diff --git a/MAINTAINERS b/MAINTAINERS
index a316907e76..b3f9f2680b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -498,8 +498,8 @@ F: include/exec/target_long.h
 F: include/qemu/accel.h
 F: include/system/accel-*.h
 F: include/system/cpus.h
-F: include/accel/accel-cpu-target.h
-F: accel/accel-*.c
+F: include/accel/accel-cpu*.h
+F: accel/accel-*.?
 F: accel/Makefile.objs
 F: accel/stubs/Makefile.objs
 F: cpu-common.c
@@ -1581,7 +1581,7 @@ F: hw/pci-host/ppc440_pcix.c
 F: hw/display/sm501*
 F: hw/ide/sii3112.c
 F: hw/rtc/m41t80.c
-F: pc-bios/canyonlands.dt[sb]
+F: pc-bios/dtb/canyonlands.dt[sb]
 F: pc-bios/u-boot-sam460ex-20100605.bin
 F: roms/u-boot-sam460ex
 F: docs/system/ppc/amigang.rst
@@ -1926,6 +1926,13 @@ F: tests/functional/test_empty_cpu_model.py
 F: tests/unit/test-smp-parse.c
 T: git https://gitlab.com/ehabkost/qemu.git machine-next
 
+TargetInfo API
+M: Pierrick Bouvier <pierrick.bouvier@linaro.org>
+M: Philippe Mathieu-Daudé <philmd@linaro.org>
+S: Supported
+F: include/qemu/target-info*.h
+F: target-info*.c
+
 Xtensa Machines
 ---------------
 sim
diff --git a/accel/accel-common.c b/accel/accel-common.c
new file mode 100644
index 0000000000..4894b98d64
--- /dev/null
+++ b/accel/accel-common.c
@@ -0,0 +1,142 @@
+/*
+ * QEMU accel class, components common to system emulation and user mode
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2014 Red Hat Inc.
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/accel.h"
+#include "qemu/target-info.h"
+#include "accel/accel-cpu.h"
+#include "accel-internal.h"
+
+/* Lookup AccelClass from opt_name. Returns NULL if not found */
+AccelClass *accel_find(const char *opt_name)
+{
+    char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s"), opt_name);
+    AccelClass *ac = ACCEL_CLASS(module_object_class_by_name(class_name));
+    g_free(class_name);
+    return ac;
+}
+
+/* Return the name of the current accelerator */
+const char *current_accel_name(void)
+{
+    AccelClass *ac = ACCEL_GET_CLASS(current_accel());
+
+    return ac->name;
+}
+
+static void accel_init_cpu_int_aux(ObjectClass *klass, void *opaque)
+{
+    CPUClass *cc = CPU_CLASS(klass);
+    AccelCPUClass *accel_cpu = opaque;
+
+    /*
+     * The first callback allows accel-cpu to run initializations
+     * for the CPU, customizing CPU behavior according to the accelerator.
+     *
+     * The second one allows the CPU to customize the accel-cpu
+     * behavior according to the CPU.
+     *
+     * The second is currently only used by TCG, to specialize the
+     * TCGCPUOps depending on the CPU type.
+     */
+    cc->accel_cpu = accel_cpu;
+    if (accel_cpu->cpu_class_init) {
+        accel_cpu->cpu_class_init(cc);
+    }
+    if (cc->init_accel_cpu) {
+        cc->init_accel_cpu(accel_cpu, cc);
+    }
+}
+
+/* initialize the arch-specific accel CpuClass interfaces */
+static void accel_init_cpu_interfaces(AccelClass *ac)
+{
+    const char *ac_name; /* AccelClass name */
+    char *acc_name;      /* AccelCPUClass name */
+    ObjectClass *acc;    /* AccelCPUClass */
+    const char *cpu_resolving_type = target_cpu_type();
+
+    ac_name = object_class_get_name(OBJECT_CLASS(ac));
+    g_assert(ac_name != NULL);
+
+    acc_name = g_strdup_printf("%s-%s", ac_name, cpu_resolving_type);
+    acc = object_class_by_name(acc_name);
+    g_free(acc_name);
+
+    if (acc) {
+        object_class_foreach(accel_init_cpu_int_aux,
+                             cpu_resolving_type, false, acc);
+    }
+}
+
+void accel_init_interfaces(AccelClass *ac)
+{
+    accel_init_ops_interfaces(ac);
+    accel_init_cpu_interfaces(ac);
+}
+
+void accel_cpu_instance_init(CPUState *cpu)
+{
+    if (cpu->cc->accel_cpu && cpu->cc->accel_cpu->cpu_instance_init) {
+        cpu->cc->accel_cpu->cpu_instance_init(cpu);
+    }
+}
+
+bool accel_cpu_common_realize(CPUState *cpu, Error **errp)
+{
+    AccelState *accel = current_accel();
+    AccelClass *acc = ACCEL_GET_CLASS(accel);
+
+    /* target specific realization */
+    if (cpu->cc->accel_cpu
+        && cpu->cc->accel_cpu->cpu_target_realize
+        && !cpu->cc->accel_cpu->cpu_target_realize(cpu, errp)) {
+        return false;
+    }
+
+    /* generic realization */
+    if (acc->cpu_common_realize && !acc->cpu_common_realize(cpu, errp)) {
+        return false;
+    }
+
+    return true;
+}
+
+void accel_cpu_common_unrealize(CPUState *cpu)
+{
+    AccelState *accel = current_accel();
+    AccelClass *acc = ACCEL_GET_CLASS(accel);
+
+    /* generic unrealization */
+    if (acc->cpu_common_unrealize) {
+        acc->cpu_common_unrealize(cpu);
+    }
+}
+
+int accel_supported_gdbstub_sstep_flags(void)
+{
+    AccelState *accel = current_accel();
+    AccelClass *acc = ACCEL_GET_CLASS(accel);
+    if (acc->gdbstub_supported_sstep_flags) {
+        return acc->gdbstub_supported_sstep_flags();
+    }
+    return 0;
+}
+
+static const TypeInfo accel_types[] = {
+    {
+        .name           = TYPE_ACCEL,
+        .parent         = TYPE_OBJECT,
+        .class_size     = sizeof(AccelClass),
+        .instance_size  = sizeof(AccelState),
+        .abstract       = true,
+    },
+};
+
+DEFINE_TYPES(accel_types)
diff --git a/accel/accel-system.h b/accel/accel-internal.h
similarity index 56%
rename from accel/accel-system.h
rename to accel/accel-internal.h
index 2d37c73c97..d3a4422cbf 100644
--- a/accel/accel-system.h
+++ b/accel/accel-internal.h
@@ -1,5 +1,5 @@
 /*
- * QEMU System Emulation accel internal functions
+ * QEMU accel internal functions
  *
  * Copyright 2021 SUSE LLC
  *
@@ -7,9 +7,11 @@
  * See the COPYING file in the top-level directory.
  */
 
-#ifndef ACCEL_SYSTEM_H
-#define ACCEL_SYSTEM_H
+#ifndef ACCEL_INTERNAL_H
+#define ACCEL_INTERNAL_H
 
-void accel_system_init_ops_interfaces(AccelClass *ac);
+#include "qemu/accel.h"
+
+void accel_init_ops_interfaces(AccelClass *ac);
 
 #endif /* ACCEL_SYSTEM_H */
diff --git a/accel/accel-system.c b/accel/accel-system.c
index 5df49fbe83..a0f562ae9f 100644
--- a/accel/accel-system.c
+++ b/accel/accel-system.c
@@ -29,7 +29,7 @@
 #include "system/accel-ops.h"
 #include "system/cpus.h"
 #include "qemu/error-report.h"
-#include "accel-system.h"
+#include "accel-internal.h"
 
 int accel_init_machine(AccelState *accel, MachineState *ms)
 {
@@ -63,7 +63,7 @@ void accel_setup_post(MachineState *ms)
 }
 
 /* initialize the arch-independent accel operation interfaces */
-void accel_system_init_ops_interfaces(AccelClass *ac)
+void accel_init_ops_interfaces(AccelClass *ac)
 {
     const char *ac_name;
     char *ops_name;
diff --git a/accel/accel-target.c b/accel/accel-target.c
index 33a539b4cb..7fd392fbc4 100644
--- a/accel/accel-target.c
+++ b/accel/accel-target.c
@@ -24,141 +24,8 @@
  */
 
 #include "qemu/osdep.h"
-#include "qemu/accel.h"
-
-#include "cpu.h"
 #include "accel/accel-cpu-target.h"
 
-#ifndef CONFIG_USER_ONLY
-#include "accel-system.h"
-#endif /* !CONFIG_USER_ONLY */
-
-static const TypeInfo accel_type = {
-    .name = TYPE_ACCEL,
-    .parent = TYPE_OBJECT,
-    .class_size = sizeof(AccelClass),
-    .instance_size = sizeof(AccelState),
-    .abstract = true,
-};
-
-/* Lookup AccelClass from opt_name. Returns NULL if not found */
-AccelClass *accel_find(const char *opt_name)
-{
-    char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s"), opt_name);
-    AccelClass *ac = ACCEL_CLASS(module_object_class_by_name(class_name));
-    g_free(class_name);
-    return ac;
-}
-
-/* Return the name of the current accelerator */
-const char *current_accel_name(void)
-{
-    AccelClass *ac = ACCEL_GET_CLASS(current_accel());
-
-    return ac->name;
-}
-
-static void accel_init_cpu_int_aux(ObjectClass *klass, void *opaque)
-{
-    CPUClass *cc = CPU_CLASS(klass);
-    AccelCPUClass *accel_cpu = opaque;
-
-    /*
-     * The first callback allows accel-cpu to run initializations
-     * for the CPU, customizing CPU behavior according to the accelerator.
-     *
-     * The second one allows the CPU to customize the accel-cpu
-     * behavior according to the CPU.
-     *
-     * The second is currently only used by TCG, to specialize the
-     * TCGCPUOps depending on the CPU type.
-     */
-    cc->accel_cpu = accel_cpu;
-    if (accel_cpu->cpu_class_init) {
-        accel_cpu->cpu_class_init(cc);
-    }
-    if (cc->init_accel_cpu) {
-        cc->init_accel_cpu(accel_cpu, cc);
-    }
-}
-
-/* initialize the arch-specific accel CpuClass interfaces */
-static void accel_init_cpu_interfaces(AccelClass *ac)
-{
-    const char *ac_name; /* AccelClass name */
-    char *acc_name;      /* AccelCPUClass name */
-    ObjectClass *acc;    /* AccelCPUClass */
-
-    ac_name = object_class_get_name(OBJECT_CLASS(ac));
-    g_assert(ac_name != NULL);
-
-    acc_name = g_strdup_printf("%s-%s", ac_name, CPU_RESOLVING_TYPE);
-    acc = object_class_by_name(acc_name);
-    g_free(acc_name);
-
-    if (acc) {
-        object_class_foreach(accel_init_cpu_int_aux,
-                             CPU_RESOLVING_TYPE, false, acc);
-    }
-}
-
-void accel_init_interfaces(AccelClass *ac)
-{
-#ifndef CONFIG_USER_ONLY
-    accel_system_init_ops_interfaces(ac);
-#endif /* !CONFIG_USER_ONLY */
-
-    accel_init_cpu_interfaces(ac);
-}
-
-void accel_cpu_instance_init(CPUState *cpu)
-{
-    if (cpu->cc->accel_cpu && cpu->cc->accel_cpu->cpu_instance_init) {
-        cpu->cc->accel_cpu->cpu_instance_init(cpu);
-    }
-}
-
-bool accel_cpu_common_realize(CPUState *cpu, Error **errp)
-{
-    AccelState *accel = current_accel();
-    AccelClass *acc = ACCEL_GET_CLASS(accel);
-
-    /* target specific realization */
-    if (cpu->cc->accel_cpu
-        && cpu->cc->accel_cpu->cpu_target_realize
-        && !cpu->cc->accel_cpu->cpu_target_realize(cpu, errp)) {
-        return false;
-    }
-
-    /* generic realization */
-    if (acc->cpu_common_realize && !acc->cpu_common_realize(cpu, errp)) {
-        return false;
-    }
-
-    return true;
-}
-
-void accel_cpu_common_unrealize(CPUState *cpu)
-{
-    AccelState *accel = current_accel();
-    AccelClass *acc = ACCEL_GET_CLASS(accel);
-
-    /* generic unrealization */
-    if (acc->cpu_common_unrealize) {
-        acc->cpu_common_unrealize(cpu);
-    }
-}
-
-int accel_supported_gdbstub_sstep_flags(void)
-{
-    AccelState *accel = current_accel();
-    AccelClass *acc = ACCEL_GET_CLASS(accel);
-    if (acc->gdbstub_supported_sstep_flags) {
-        return acc->gdbstub_supported_sstep_flags();
-    }
-    return 0;
-}
-
 static const TypeInfo accel_cpu_type = {
     .name = TYPE_ACCEL_CPU,
     .parent = TYPE_OBJECT,
@@ -168,7 +35,6 @@ static const TypeInfo accel_cpu_type = {
 
 static void register_accel_types(void)
 {
-    type_register_static(&accel_type);
     type_register_static(&accel_cpu_type);
 }
 
diff --git a/accel/accel-user.c b/accel/accel-user.c
index 22b6a1a1a8..7d192306a6 100644
--- a/accel/accel-user.c
+++ b/accel/accel-user.c
@@ -9,6 +9,12 @@
 
 #include "qemu/osdep.h"
 #include "qemu/accel.h"
+#include "accel-internal.h"
+
+void accel_init_ops_interfaces(AccelClass *ac)
+{
+    /* nothing */
+}
 
 AccelState *current_accel(void)
 {
diff --git a/accel/hvf/hvf-accel-ops.c b/accel/hvf/hvf-accel-ops.c
index 601c3bc0ac..5375de7bcf 100644
--- a/accel/hvf/hvf-accel-ops.c
+++ b/accel/hvf/hvf-accel-ops.c
@@ -355,7 +355,7 @@ static inline int hvf_gdbstub_sstep_flags(void)
     return SSTEP_ENABLE | SSTEP_NOIRQ;
 }
 
-static void hvf_accel_class_init(ObjectClass *oc, void *data)
+static void hvf_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
     ac->name = "HVF";
@@ -578,7 +578,7 @@ static void hvf_remove_all_breakpoints(CPUState *cpu)
     }
 }
 
-static void hvf_accel_ops_class_init(ObjectClass *oc, void *data)
+static void hvf_accel_ops_class_init(ObjectClass *oc, const void *data)
 {
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
 
diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c
index 54ea60909e..e5c15449aa 100644
--- a/accel/kvm/kvm-accel-ops.c
+++ b/accel/kvm/kvm-accel-ops.c
@@ -90,7 +90,7 @@ static int kvm_update_guest_debug_ops(CPUState *cpu)
 }
 #endif
 
-static void kvm_accel_ops_class_init(ObjectClass *oc, void *data)
+static void kvm_accel_ops_class_init(ObjectClass *oc, const void *data)
 {
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
 
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index cba9c78d2f..278a50690c 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -33,6 +33,7 @@
 #include "system/cpus.h"
 #include "system/accel-blocker.h"
 #include "qemu/bswap.h"
+#include "exec/tswap.h"
 #include "system/memory.h"
 #include "system/ram_addr.h"
 #include "qemu/event_notifier.h"
@@ -1318,21 +1319,22 @@ bool kvm_hwpoisoned_mem(void)
 
 static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size)
 {
-#if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN
-    /* The kernel expects ioeventfd values in HOST_BIG_ENDIAN
-     * endianness, but the memory core hands them in target endianness.
-     * For example, PPC is always treated as big-endian even if running
-     * on KVM and on PPC64LE.  Correct here.
-     */
-    switch (size) {
-    case 2:
-        val = bswap16(val);
-        break;
-    case 4:
-        val = bswap32(val);
-        break;
+    if (target_needs_bswap()) {
+        /*
+         * The kernel expects ioeventfd values in HOST_BIG_ENDIAN
+         * endianness, but the memory core hands them in target endianness.
+         * For example, PPC is always treated as big-endian even if running
+         * on KVM and on PPC64LE.  Correct here, swapping back.
+         */
+        switch (size) {
+        case 2:
+            val = bswap16(val);
+            break;
+        case 4:
+            val = bswap32(val);
+            break;
+        }
     }
-#endif
     return val;
 }
 
@@ -3964,7 +3966,7 @@ static int kvm_gdbstub_sstep_flags(void)
     return kvm_sstep_flags;
 }
 
-static void kvm_accel_class_init(ObjectClass *oc, void *data)
+static void kvm_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
     ac->name = "KVM";
diff --git a/accel/meson.build b/accel/meson.build
index 5eaeb68338..52909314bf 100644
--- a/accel/meson.build
+++ b/accel/meson.build
@@ -1,3 +1,4 @@
+common_ss.add(files('accel-common.c'))
 specific_ss.add(files('accel-target.c'))
 system_ss.add(files('accel-system.c', 'accel-blocker.c'))
 user_ss.add(files('accel-user.c'))
diff --git a/accel/qtest/qtest.c b/accel/qtest/qtest.c
index 7fae80f6a1..92bed9264c 100644
--- a/accel/qtest/qtest.c
+++ b/accel/qtest/qtest.c
@@ -42,7 +42,7 @@ static int qtest_init_accel(MachineState *ms)
     return 0;
 }
 
-static void qtest_accel_class_init(ObjectClass *oc, void *data)
+static void qtest_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
     ac->name = "QTest";
@@ -59,7 +59,7 @@ static const TypeInfo qtest_accel_type = {
 };
 module_obj(TYPE_QTEST_ACCEL);
 
-static void qtest_accel_ops_class_init(ObjectClass *oc, void *data)
+static void qtest_accel_ops_class_init(ObjectClass *oc, const void *data)
 {
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
 
diff --git a/accel/stubs/tcg-stub.c b/accel/stubs/tcg-stub.c
index b2b9881bdf..3b76b8b17c 100644
--- a/accel/stubs/tcg-stub.c
+++ b/accel/stubs/tcg-stub.c
@@ -11,8 +11,7 @@
  */
 
 #include "qemu/osdep.h"
-#include "exec/tb-flush.h"
-#include "exec/exec-all.h"
+#include "exec/cpu-common.h"
 
 G_NORETURN void cpu_loop_exit(CPUState *cpu)
 {
diff --git a/accel/tcg/tcg-accel-ops.c b/accel/tcg/tcg-accel-ops.c
index ccdb781eef..b24d6a7562 100644
--- a/accel/tcg/tcg-accel-ops.c
+++ b/accel/tcg/tcg-accel-ops.c
@@ -224,7 +224,7 @@ static void tcg_accel_ops_init(AccelOpsClass *ops)
     ops->remove_all_breakpoints = tcg_remove_all_breakpoints;
 }
 
-static void tcg_accel_ops_class_init(ObjectClass *oc, void *data)
+static void tcg_accel_ops_class_init(ObjectClass *oc, const void *data)
 {
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
 
diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c
index b0d4e3e136..0ce34ac912 100644
--- a/accel/tcg/tcg-all.c
+++ b/accel/tcg/tcg-all.c
@@ -35,6 +35,7 @@
 #include "qapi/qapi-types-common.h"
 #include "qapi/qapi-builtin-visit.h"
 #include "qemu/units.h"
+#include "qemu/target-info.h"
 #if defined(CONFIG_USER_ONLY)
 #include "hw/qdev-core.h"
 #else
@@ -43,7 +44,7 @@
 #endif
 #include "accel/tcg/cpu-ops.h"
 #include "internal-common.h"
-#include "cpu.h"
+#include "cpu-param.h"
 
 
 struct TCGState {
@@ -89,7 +90,7 @@ static int tcg_init_machine(MachineState *ms)
     unsigned max_threads = 1;
 
 #ifndef CONFIG_USER_ONLY
-    CPUClass *cc = CPU_CLASS(object_class_by_name(CPU_RESOLVING_TYPE));
+    CPUClass *cc = CPU_CLASS(object_class_by_name(target_cpu_type()));
     bool mttcg_supported = cc->tcg_ops->mttcg_supported;
 
     switch (s->mttcg_enabled) {
@@ -237,7 +238,7 @@ static int tcg_gdbstub_supported_sstep_flags(void)
     }
 }
 
-static void tcg_accel_class_init(ObjectClass *oc, void *data)
+static void tcg_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
     ac->name = "tcg";
diff --git a/accel/xen/xen-all.c b/accel/xen/xen-all.c
index 7aa28b9ab9..de52a8f882 100644
--- a/accel/xen/xen-all.c
+++ b/accel/xen/xen-all.c
@@ -116,7 +116,7 @@ static int xen_init(MachineState *ms)
     return 0;
 }
 
-static void xen_accel_class_init(ObjectClass *oc, void *data)
+static void xen_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
     static GlobalProperty compat[] = {
@@ -147,7 +147,7 @@ static const TypeInfo xen_accel_type = {
     .class_init = xen_accel_class_init,
 };
 
-static void xen_accel_ops_class_init(ObjectClass *oc, void *data)
+static void xen_accel_ops_class_init(ObjectClass *oc, const void *data)
 {
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
 
diff --git a/authz/list.c b/authz/list.c
index 0e17eed897..17aa0efd80 100644
--- a/authz/list.c
+++ b/authz/list.c
@@ -116,7 +116,7 @@ qauthz_list_finalize(Object *obj)
 
 
 static void
-qauthz_list_class_init(ObjectClass *oc, void *data)
+qauthz_list_class_init(ObjectClass *oc, const void *data)
 {
     QAuthZClass *authz = QAUTHZ_CLASS(oc);
 
@@ -253,7 +253,7 @@ static const TypeInfo qauthz_list_info = {
     .instance_size = sizeof(QAuthZList),
     .instance_finalize = qauthz_list_finalize,
     .class_init = qauthz_list_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/authz/listfile.c b/authz/listfile.c
index d31d9103f7..13741d5a72 100644
--- a/authz/listfile.c
+++ b/authz/listfile.c
@@ -220,7 +220,7 @@ qauthz_list_file_finalize(Object *obj)
 
 
 static void
-qauthz_list_file_class_init(ObjectClass *oc, void *data)
+qauthz_list_file_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
     QAuthZClass *authz = QAUTHZ_CLASS(oc);
@@ -272,7 +272,7 @@ static const TypeInfo qauthz_list_file_info = {
     .instance_size = sizeof(QAuthZListFile),
     .instance_finalize = qauthz_list_file_finalize,
     .class_init = qauthz_list_file_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/authz/pamacct.c b/authz/pamacct.c
index c862d9ff39..c0ad67479a 100644
--- a/authz/pamacct.c
+++ b/authz/pamacct.c
@@ -103,7 +103,7 @@ qauthz_pam_finalize(Object *obj)
 
 
 static void
-qauthz_pam_class_init(ObjectClass *oc, void *data)
+qauthz_pam_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
     QAuthZClass *authz = QAUTHZ_CLASS(oc);
@@ -136,7 +136,7 @@ static const TypeInfo qauthz_pam_info = {
     .instance_size = sizeof(QAuthZPAM),
     .instance_finalize = qauthz_pam_finalize,
     .class_init = qauthz_pam_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/authz/simple.c b/authz/simple.c
index 0597dcd8ea..f8f2b98518 100644
--- a/authz/simple.c
+++ b/authz/simple.c
@@ -78,7 +78,7 @@ qauthz_simple_complete(UserCreatable *uc, Error **errp)
 
 
 static void
-qauthz_simple_class_init(ObjectClass *oc, void *data)
+qauthz_simple_class_init(ObjectClass *oc, const void *data)
 {
     QAuthZClass *authz = QAUTHZ_CLASS(oc);
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
@@ -111,7 +111,7 @@ static const TypeInfo qauthz_simple_info = {
     .instance_size = sizeof(QAuthZSimple),
     .instance_finalize = qauthz_simple_finalize,
     .class_init = qauthz_simple_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/backends/confidential-guest-support.c b/backends/confidential-guest-support.c
index 1cd9bed505..8ff7bfa857 100644
--- a/backends/confidential-guest-support.c
+++ b/backends/confidential-guest-support.c
@@ -20,7 +20,8 @@ OBJECT_DEFINE_ABSTRACT_TYPE(ConfidentialGuestSupport,
                             CONFIDENTIAL_GUEST_SUPPORT,
                             OBJECT)
 
-static void confidential_guest_support_class_init(ObjectClass *oc, void *data)
+static void confidential_guest_support_class_init(ObjectClass *oc,
+                                                  const void *data)
 {
 }
 
diff --git a/backends/cryptodev-builtin.c b/backends/cryptodev-builtin.c
index 764cee4311..0414c01e06 100644
--- a/backends/cryptodev-builtin.c
+++ b/backends/cryptodev-builtin.c
@@ -608,7 +608,7 @@ static void cryptodev_builtin_cleanup(
 }
 
 static void
-cryptodev_builtin_class_init(ObjectClass *oc, void *data)
+cryptodev_builtin_class_init(ObjectClass *oc, const void *data)
 {
     CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
 
diff --git a/backends/cryptodev-lkcf.c b/backends/cryptodev-lkcf.c
index 352c3e8958..bb7a81d5d0 100644
--- a/backends/cryptodev-lkcf.c
+++ b/backends/cryptodev-lkcf.c
@@ -619,7 +619,7 @@ static int cryptodev_lkcf_close_session(CryptoDevBackend *backend,
     return 0;
 }
 
-static void cryptodev_lkcf_class_init(ObjectClass *oc, void *data)
+static void cryptodev_lkcf_class_init(ObjectClass *oc, const void *data)
 {
     CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
 
diff --git a/backends/cryptodev-vhost-user.c b/backends/cryptodev-vhost-user.c
index 3295c6198a..cb04e68b02 100644
--- a/backends/cryptodev-vhost-user.c
+++ b/backends/cryptodev-vhost-user.c
@@ -393,7 +393,7 @@ static void cryptodev_vhost_user_finalize(Object *obj)
 }
 
 static void
-cryptodev_vhost_user_class_init(ObjectClass *oc, void *data)
+cryptodev_vhost_user_class_init(ObjectClass *oc, const void *data)
 {
     CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
 
diff --git a/backends/cryptodev.c b/backends/cryptodev.c
index 1187b08dac..79f8882d3b 100644
--- a/backends/cryptodev.c
+++ b/backends/cryptodev.c
@@ -608,7 +608,7 @@ static void cryptodev_backend_schemas_cb(StatsSchemaList **result,
 }
 
 static void
-cryptodev_backend_class_init(ObjectClass *oc, void *data)
+cryptodev_backend_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -641,7 +641,7 @@ static const TypeInfo cryptodev_backend_info = {
     .instance_finalize = cryptodev_backend_finalize,
     .class_size = sizeof(CryptoDevBackendClass),
     .class_init = cryptodev_backend_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/backends/dbus-vmstate.c b/backends/dbus-vmstate.c
index be6c4d8e0a..7d5b58b4c9 100644
--- a/backends/dbus-vmstate.c
+++ b/backends/dbus-vmstate.c
@@ -485,7 +485,7 @@ dbus_vmstate_get_id(VMStateIf *vmif)
 }
 
 static void
-dbus_vmstate_class_init(ObjectClass *oc, void *data)
+dbus_vmstate_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
     VMStateIfClass *vc = VMSTATE_IF_CLASS(oc);
@@ -505,7 +505,7 @@ static const TypeInfo dbus_vmstate_info = {
     .instance_size = sizeof(DBusVMState),
     .instance_finalize = dbus_vmstate_finalize,
     .class_init = dbus_vmstate_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { TYPE_VMSTATE_IF },
         { }
diff --git a/backends/host_iommu_device.c b/backends/host_iommu_device.c
index cea76c6925..f6965e4027 100644
--- a/backends/host_iommu_device.c
+++ b/backends/host_iommu_device.c
@@ -17,7 +17,7 @@ OBJECT_DEFINE_ABSTRACT_TYPE(HostIOMMUDevice,
                             HOST_IOMMU_DEVICE,
                             OBJECT)
 
-static void host_iommu_device_class_init(ObjectClass *oc, void *data)
+static void host_iommu_device_class_init(ObjectClass *oc, const void *data)
 {
 }
 
diff --git a/backends/hostmem-epc.c b/backends/hostmem-epc.c
index 1fa2d031e4..ab20b18233 100644
--- a/backends/hostmem-epc.c
+++ b/backends/hostmem-epc.c
@@ -50,7 +50,7 @@ static void sgx_epc_backend_instance_init(Object *obj)
     m->dump = false;
 }
 
-static void sgx_epc_backend_class_init(ObjectClass *oc, void *data)
+static void sgx_epc_backend_class_init(ObjectClass *oc, const void *data)
 {
     HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
 
diff --git a/backends/hostmem-file.c b/backends/hostmem-file.c
index 691a827819..8e3219c061 100644
--- a/backends/hostmem-file.c
+++ b/backends/hostmem-file.c
@@ -270,7 +270,7 @@ static void file_backend_unparent(Object *obj)
 }
 
 static void
-file_backend_class_init(ObjectClass *oc, void *data)
+file_backend_class_init(ObjectClass *oc, const void *data)
 {
     HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
 
diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c
index 85daa1432c..923239f9cf 100644
--- a/backends/hostmem-memfd.c
+++ b/backends/hostmem-memfd.c
@@ -133,7 +133,7 @@ memfd_backend_instance_init(Object *obj)
 }
 
 static void
-memfd_backend_class_init(ObjectClass *oc, void *data)
+memfd_backend_class_init(ObjectClass *oc, const void *data)
 {
     HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
 
diff --git a/backends/hostmem-ram.c b/backends/hostmem-ram.c
index 868ae6ca80..062b1abb11 100644
--- a/backends/hostmem-ram.c
+++ b/backends/hostmem-ram.c
@@ -37,7 +37,7 @@ ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
 }
 
 static void
-ram_backend_class_init(ObjectClass *oc, void *data)
+ram_backend_class_init(ObjectClass *oc, const void *data)
 {
     HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
 
diff --git a/backends/hostmem-shm.c b/backends/hostmem-shm.c
index f67ad2740b..f66211a2ec 100644
--- a/backends/hostmem-shm.c
+++ b/backends/hostmem-shm.c
@@ -69,7 +69,7 @@ shm_backend_instance_init(Object *obj)
 }
 
 static void
-shm_backend_class_init(ObjectClass *oc, void *data)
+shm_backend_class_init(ObjectClass *oc, const void *data)
 {
     HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
 
diff --git a/backends/hostmem.c b/backends/hostmem.c
index bceca1a8d9..35734d6f4d 100644
--- a/backends/hostmem.c
+++ b/backends/hostmem.c
@@ -501,7 +501,7 @@ host_memory_backend_set_use_canonical_path(Object *obj, bool value,
 }
 
 static void
-host_memory_backend_class_init(ObjectClass *oc, void *data)
+host_memory_backend_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -586,7 +586,7 @@ static const TypeInfo host_memory_backend_info = {
     .instance_size = sizeof(HostMemoryBackend),
     .instance_init = host_memory_backend_init,
     .instance_post_init = host_memory_backend_post_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/backends/iommufd.c b/backends/iommufd.c
index 9587e4d99b..b73f75cd0b 100644
--- a/backends/iommufd.c
+++ b/backends/iommufd.c
@@ -64,7 +64,7 @@ static bool iommufd_backend_can_be_deleted(UserCreatable *uc)
     return !be->users;
 }
 
-static void iommufd_backend_class_init(ObjectClass *oc, void *data)
+static void iommufd_backend_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -326,7 +326,7 @@ static int hiod_iommufd_get_cap(HostIOMMUDevice *hiod, int cap, Error **errp)
     }
 }
 
-static void hiod_iommufd_class_init(ObjectClass *oc, void *data)
+static void hiod_iommufd_class_init(ObjectClass *oc, const void *data)
 {
     HostIOMMUDeviceClass *hioc = HOST_IOMMU_DEVICE_CLASS(oc);
 
@@ -342,7 +342,7 @@ static const TypeInfo types[] = {
         .instance_finalize = iommufd_backend_finalize,
         .class_size = sizeof(IOMMUFDBackendClass),
         .class_init = iommufd_backend_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { TYPE_USER_CREATABLE },
             { }
         }
diff --git a/backends/rng-builtin.c b/backends/rng-builtin.c
index 4cfa7e578b..41b7bfaa27 100644
--- a/backends/rng-builtin.c
+++ b/backends/rng-builtin.c
@@ -55,7 +55,7 @@ static void rng_builtin_finalize(Object *obj)
     qemu_bh_delete(s->bh);
 }
 
-static void rng_builtin_class_init(ObjectClass *klass, void *data)
+static void rng_builtin_class_init(ObjectClass *klass, const void *data)
 {
     RngBackendClass *rbc = RNG_BACKEND_CLASS(klass);
 
diff --git a/backends/rng-egd.c b/backends/rng-egd.c
index 82da46365d..9fd3393ede 100644
--- a/backends/rng-egd.c
+++ b/backends/rng-egd.c
@@ -143,7 +143,7 @@ static void rng_egd_finalize(Object *obj)
     g_free(s->chr_name);
 }
 
-static void rng_egd_class_init(ObjectClass *klass, void *data)
+static void rng_egd_class_init(ObjectClass *klass, const void *data)
 {
     RngBackendClass *rbc = RNG_BACKEND_CLASS(klass);
 
diff --git a/backends/rng-random.c b/backends/rng-random.c
index 3ce6cc9b4a..820bf48c9b 100644
--- a/backends/rng-random.c
+++ b/backends/rng-random.c
@@ -121,7 +121,7 @@ static void rng_random_finalize(Object *obj)
     g_free(s->filename);
 }
 
-static void rng_random_class_init(ObjectClass *klass, void *data)
+static void rng_random_class_init(ObjectClass *klass, const void *data)
 {
     RngBackendClass *rbc = RNG_BACKEND_CLASS(klass);
 
diff --git a/backends/rng.c b/backends/rng.c
index 1f6fb106ae..ab94dfea85 100644
--- a/backends/rng.c
+++ b/backends/rng.c
@@ -99,7 +99,7 @@ static void rng_backend_finalize(Object *obj)
     rng_backend_free_requests(s);
 }
 
-static void rng_backend_class_init(ObjectClass *oc, void *data)
+static void rng_backend_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -119,7 +119,7 @@ static const TypeInfo rng_backend_info = {
     .class_size = sizeof(RngBackendClass),
     .class_init = rng_backend_class_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/backends/tpm/tpm_emulator.c b/backends/tpm/tpm_emulator.c
index 00fe015a94..43d350e895 100644
--- a/backends/tpm/tpm_emulator.c
+++ b/backends/tpm/tpm_emulator.c
@@ -1056,7 +1056,7 @@ static void tpm_emulator_inst_finalize(Object *obj)
     vmstate_unregister(NULL, &vmstate_tpm_emulator, obj);
 }
 
-static void tpm_emulator_class_init(ObjectClass *klass, void *data)
+static void tpm_emulator_class_init(ObjectClass *klass, const void *data)
 {
     TPMBackendClass *tbc = TPM_BACKEND_CLASS(klass);
 
diff --git a/backends/tpm/tpm_passthrough.c b/backends/tpm/tpm_passthrough.c
index 09a6abf02d..b7c7074c2a 100644
--- a/backends/tpm/tpm_passthrough.c
+++ b/backends/tpm/tpm_passthrough.c
@@ -364,7 +364,7 @@ static void tpm_passthrough_inst_finalize(Object *obj)
     qapi_free_TPMPassthroughOptions(tpm_pt->options);
 }
 
-static void tpm_passthrough_class_init(ObjectClass *klass, void *data)
+static void tpm_passthrough_class_init(ObjectClass *klass, const void *data)
 {
     TPMBackendClass *tbc = TPM_BACKEND_CLASS(klass);
 
diff --git a/backends/vhost-user.c b/backends/vhost-user.c
index d0e4d71a63..94274a619d 100644
--- a/backends/vhost-user.c
+++ b/backends/vhost-user.c
@@ -163,7 +163,7 @@ static char *get_chardev(Object *obj, Error **errp)
     return NULL;
 }
 
-static void vhost_user_backend_class_init(ObjectClass *oc, void *data)
+static void vhost_user_backend_class_init(ObjectClass *oc, const void *data)
 {
     object_class_property_add_str(oc, "chardev", get_chardev, set_chardev);
 }
diff --git a/block/throttle-groups.c b/block/throttle-groups.c
index 9f4d252c74..66fdce9a90 100644
--- a/block/throttle-groups.c
+++ b/block/throttle-groups.c
@@ -933,7 +933,8 @@ static bool throttle_group_can_be_deleted(UserCreatable *uc)
     return OBJECT(uc)->ref == 1;
 }
 
-static void throttle_group_obj_class_init(ObjectClass *klass, void *class_data)
+static void throttle_group_obj_class_init(ObjectClass *klass,
+                                          const void *class_data)
 {
     size_t i = 0;
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(klass);
@@ -966,7 +967,7 @@ static const TypeInfo throttle_group_info = {
     .instance_size = sizeof(ThrottleGroup),
     .instance_init = throttle_group_obj_init,
     .instance_finalize = throttle_group_obj_finalize,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     },
diff --git a/chardev/baum.c b/chardev/baum.c
index a1d9784d92..f3e8cd27f0 100644
--- a/chardev/baum.c
+++ b/chardev/baum.c
@@ -668,7 +668,7 @@ static void baum_chr_open(Chardev *chr,
     qemu_set_fd_handler(baum->brlapi_fd, baum_chr_read, NULL, baum);
 }
 
-static void char_braille_class_init(ObjectClass *oc, void *data)
+static void char_braille_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-console.c b/chardev/char-console.c
index 6c4ce5dbce..7e1bf642eb 100644
--- a/chardev/char-console.c
+++ b/chardev/char-console.c
@@ -34,7 +34,7 @@ static void qemu_chr_open_win_con(Chardev *chr,
     win_chr_set_file(chr, GetStdHandle(STD_OUTPUT_HANDLE), true);
 }
 
-static void char_console_class_init(ObjectClass *oc, void *data)
+static void char_console_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-fd.c b/chardev/char-fd.c
index d2c4923359..23bfe3c0b1 100644
--- a/chardev/char-fd.c
+++ b/chardev/char-fd.c
@@ -238,7 +238,7 @@ void qemu_chr_open_fd(Chardev *chr,
     }
 }
 
-static void char_fd_class_init(ObjectClass *oc, void *data)
+static void char_fd_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-file.c b/chardev/char-file.c
index 263e6da563..a9e8c5e0d7 100644
--- a/chardev/char-file.c
+++ b/chardev/char-file.c
@@ -123,7 +123,7 @@ static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
     file->append = qemu_opt_get_bool(opts, "append", false);
 }
 
-static void char_file_class_init(ObjectClass *oc, void *data)
+static void char_file_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-hub.c b/chardev/char-hub.c
index 3a4aae3289..16ffee2017 100644
--- a/chardev/char-hub.c
+++ b/chardev/char-hub.c
@@ -272,7 +272,7 @@ static void qemu_chr_parse_hub(QemuOpts *opts, ChardevBackend *backend,
     }
 }
 
-static void char_hub_class_init(ObjectClass *oc, void *data)
+static void char_hub_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-mux.c b/chardev/char-mux.c
index d5f7e1a9cf..6b36290e2c 100644
--- a/chardev/char-mux.c
+++ b/chardev/char-mux.c
@@ -447,7 +447,7 @@ void resume_mux_open(void)
                          chardev_options_parsed_cb, NULL);
 }
 
-static void char_mux_class_init(ObjectClass *oc, void *data)
+static void char_mux_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-null.c b/chardev/char-null.c
index 1c6a2900f9..89cb85da79 100644
--- a/chardev/char-null.c
+++ b/chardev/char-null.c
@@ -34,7 +34,7 @@ static void null_chr_open(Chardev *chr,
     *be_opened = false;
 }
 
-static void char_null_class_init(ObjectClass *oc, void *data)
+static void char_null_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-parallel.c b/chardev/char-parallel.c
index 78697d7522..62a44b2f96 100644
--- a/chardev/char-parallel.c
+++ b/chardev/char-parallel.c
@@ -270,7 +270,7 @@ static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
     parallel->device = g_strdup(device);
 }
 
-static void char_parallel_class_init(ObjectClass *oc, void *data)
+static void char_parallel_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-pipe.c b/chardev/char-pipe.c
index 5ad30bcc59..3d1b0ce2d2 100644
--- a/chardev/char-pipe.c
+++ b/chardev/char-pipe.c
@@ -171,7 +171,7 @@ static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
     dev->device = g_strdup(device);
 }
 
-static void char_pipe_class_init(ObjectClass *oc, void *data)
+static void char_pipe_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-pty.c b/chardev/char-pty.c
index 6a2c1dc13a..c28554e6e0 100644
--- a/chardev/char-pty.c
+++ b/chardev/char-pty.c
@@ -390,7 +390,7 @@ static void char_pty_parse(QemuOpts *opts, ChardevBackend *backend,
     pty->path = g_strdup(path);
 }
 
-static void char_pty_class_init(ObjectClass *oc, void *data)
+static void char_pty_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-ringbuf.c b/chardev/char-ringbuf.c
index d40d21d3cf..98aadb6acf 100644
--- a/chardev/char-ringbuf.c
+++ b/chardev/char-ringbuf.c
@@ -223,7 +223,7 @@ static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
     }
 }
 
-static void char_ringbuf_class_init(ObjectClass *oc, void *data)
+static void char_ringbuf_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-serial.c b/chardev/char-serial.c
index 4b0b83d5b4..0a68b4b4e0 100644
--- a/chardev/char-serial.c
+++ b/chardev/char-serial.c
@@ -298,7 +298,7 @@ static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
     serial->device = g_strdup(device);
 }
 
-static void char_serial_class_init(ObjectClass *oc, void *data)
+static void char_serial_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-socket.c b/chardev/char-socket.c
index 2f842f9f88..e8dd2931dc 100644
--- a/chardev/char-socket.c
+++ b/chardev/char-socket.c
@@ -1581,7 +1581,7 @@ char_socket_get_connected(Object *obj, Error **errp)
     return s->state == TCP_CHARDEV_STATE_CONNECTED;
 }
 
-static void char_socket_class_init(ObjectClass *oc, void *data)
+static void char_socket_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-stdio.c b/chardev/char-stdio.c
index b960ddd4e4..48db8d2f30 100644
--- a/chardev/char-stdio.c
+++ b/chardev/char-stdio.c
@@ -136,7 +136,7 @@ static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
     stdio->signal = qemu_opt_get_bool(opts, "signal", true);
 }
 
-static void char_stdio_class_init(ObjectClass *oc, void *data)
+static void char_stdio_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-udp.c b/chardev/char-udp.c
index 3d9a2d5e77..572fab0ad1 100644
--- a/chardev/char-udp.c
+++ b/chardev/char-udp.c
@@ -219,7 +219,7 @@ static void qmp_chardev_open_udp(Chardev *chr,
     *be_opened = false;
 }
 
-static void char_udp_class_init(ObjectClass *oc, void *data)
+static void char_udp_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-win-stdio.c b/chardev/char-win-stdio.c
index 13325ca967..fb802a00b1 100644
--- a/chardev/char-win-stdio.c
+++ b/chardev/char-win-stdio.c
@@ -256,7 +256,7 @@ static int win_stdio_write(Chardev *chr, const uint8_t *buf, int len)
     return len - len1;
 }
 
-static void char_win_stdio_class_init(ObjectClass *oc, void *data)
+static void char_win_stdio_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char-win.c b/chardev/char-win.c
index d4fb44c4dc..fef45e83aa 100644
--- a/chardev/char-win.c
+++ b/chardev/char-win.c
@@ -220,7 +220,7 @@ void win_chr_set_file(Chardev *chr, HANDLE file, bool keep_open)
     s->file = file;
 }
 
-static void char_win_class_init(ObjectClass *oc, void *data)
+static void char_win_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/char.c b/chardev/char.c
index 5a9e9762ad..bbebd246c3 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -295,7 +295,7 @@ static int null_chr_write(Chardev *chr, const uint8_t *buf, int len)
     return len;
 }
 
-static void char_class_init(ObjectClass *oc, void *data)
+static void char_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/msmouse.c b/chardev/msmouse.c
index 2279694cfa..1a55755d39 100644
--- a/chardev/msmouse.c
+++ b/chardev/msmouse.c
@@ -267,7 +267,7 @@ static void msmouse_chr_open(Chardev *chr,
     fifo8_create(&mouse->outbuf, MSMOUSE_BUF_SZ);
 }
 
-static void char_msmouse_class_init(ObjectClass *oc, void *data)
+static void char_msmouse_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/spice.c b/chardev/spice.c
index e843d961a7..db53b49da2 100644
--- a/chardev/spice.c
+++ b/chardev/spice.c
@@ -347,7 +347,7 @@ static void qemu_chr_parse_spice_port(QemuOpts *opts, ChardevBackend *backend,
     spiceport->fqdn = g_strdup(name);
 }
 
-static void char_spice_class_init(ObjectClass *oc, void *data)
+static void char_spice_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
@@ -366,7 +366,7 @@ static const TypeInfo char_spice_type_info = {
 };
 module_obj(TYPE_CHARDEV_SPICE);
 
-static void char_spicevmc_class_init(ObjectClass *oc, void *data)
+static void char_spicevmc_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
@@ -382,7 +382,7 @@ static const TypeInfo char_spicevmc_type_info = {
 };
 module_obj(TYPE_CHARDEV_SPICEVMC);
 
-static void char_spiceport_class_init(ObjectClass *oc, void *data)
+static void char_spiceport_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/testdev.c b/chardev/testdev.c
index a92caca3c3..e91f4e8343 100644
--- a/chardev/testdev.c
+++ b/chardev/testdev.c
@@ -110,7 +110,7 @@ static int testdev_chr_write(Chardev *chr, const uint8_t *buf, int len)
     return orig_len;
 }
 
-static void char_testdev_class_init(ObjectClass *oc, void *data)
+static void char_testdev_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/chardev/wctablet.c b/chardev/wctablet.c
index f4008bf35b..0dc6ef08f5 100644
--- a/chardev/wctablet.c
+++ b/chardev/wctablet.c
@@ -342,7 +342,7 @@ static void wctablet_chr_open(Chardev *chr,
                                              &wctablet_handler);
 }
 
-static void wctablet_chr_class_init(ObjectClass *oc, void *data)
+static void wctablet_chr_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/contrib/plugins/cache.c b/contrib/plugins/cache.c
index 7cfd3df249..56508587d3 100644
--- a/contrib/plugins/cache.c
+++ b/contrib/plugins/cache.c
@@ -576,7 +576,7 @@ static void sum_stats(void)
     }
 }
 
-static int dcmp(gconstpointer a, gconstpointer b)
+static int dcmp(gconstpointer a, gconstpointer b, gpointer d)
 {
     InsnData *insn_a = (InsnData *) a;
     InsnData *insn_b = (InsnData *) b;
@@ -584,7 +584,7 @@ static int dcmp(gconstpointer a, gconstpointer b)
     return insn_a->l1_dmisses < insn_b->l1_dmisses ? 1 : -1;
 }
 
-static int icmp(gconstpointer a, gconstpointer b)
+static int icmp(gconstpointer a, gconstpointer b, gpointer d)
 {
     InsnData *insn_a = (InsnData *) a;
     InsnData *insn_b = (InsnData *) b;
@@ -592,7 +592,7 @@ static int icmp(gconstpointer a, gconstpointer b)
     return insn_a->l1_imisses < insn_b->l1_imisses ? 1 : -1;
 }
 
-static int l2_cmp(gconstpointer a, gconstpointer b)
+static int l2_cmp(gconstpointer a, gconstpointer b, gpointer d)
 {
     InsnData *insn_a = (InsnData *) a;
     InsnData *insn_b = (InsnData *) b;
@@ -645,7 +645,7 @@ static void log_top_insns(void)
     InsnData *insn;
 
     miss_insns = g_hash_table_get_values(miss_ht);
-    miss_insns = g_list_sort(miss_insns, dcmp);
+    miss_insns = g_list_sort_with_data(miss_insns, dcmp, NULL);
     g_autoptr(GString) rep = g_string_new("");
     g_string_append_printf(rep, "%s", "address, data misses, instruction\n");
 
@@ -659,7 +659,7 @@ static void log_top_insns(void)
                                insn->l1_dmisses, insn->disas_str);
     }
 
-    miss_insns = g_list_sort(miss_insns, icmp);
+    miss_insns = g_list_sort_with_data(miss_insns, icmp, NULL);
     g_string_append_printf(rep, "%s", "\naddress, fetch misses, instruction\n");
 
     for (curr = miss_insns, i = 0; curr && i < limit; i++, curr = curr->next) {
@@ -676,7 +676,7 @@ static void log_top_insns(void)
         goto finish;
     }
 
-    miss_insns = g_list_sort(miss_insns, l2_cmp);
+    miss_insns = g_list_sort_with_data(miss_insns, l2_cmp, NULL);
     g_string_append_printf(rep, "%s", "\naddress, L2 misses, instruction\n");
 
     for (curr = miss_insns, i = 0; curr && i < limit; i++, curr = curr->next) {
diff --git a/contrib/plugins/cflow.c b/contrib/plugins/cflow.c
index 930ecb46fc..b5e33f25f9 100644
--- a/contrib/plugins/cflow.c
+++ b/contrib/plugins/cflow.c
@@ -98,7 +98,7 @@ static GHashTable *nodes;
 struct qemu_plugin_scoreboard *state;
 
 /* SORT_HOTTEST */
-static gint hottest(gconstpointer a, gconstpointer b)
+static gint hottest(gconstpointer a, gconstpointer b, gpointer d)
 {
     NodeData *na = (NodeData *) a;
     NodeData *nb = (NodeData *) b;
@@ -107,7 +107,7 @@ static gint hottest(gconstpointer a, gconstpointer b)
         na->dest_count == nb->dest_count ? 0 : 1;
 }
 
-static gint exception(gconstpointer a, gconstpointer b)
+static gint exception(gconstpointer a, gconstpointer b, gpointer d)
 {
     NodeData *na = (NodeData *) a;
     NodeData *nb = (NodeData *) b;
@@ -116,7 +116,7 @@ static gint exception(gconstpointer a, gconstpointer b)
         na->early_exit == nb->early_exit ? 0 : 1;
 }
 
-static gint popular(gconstpointer a, gconstpointer b)
+static gint popular(gconstpointer a, gconstpointer b, gpointer d)
 {
     NodeData *na = (NodeData *) a;
     NodeData *nb = (NodeData *) b;
@@ -138,7 +138,7 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
 {
     g_autoptr(GString) result = g_string_new("collected ");
     GList *data;
-    GCompareFunc sort = &hottest;
+    GCompareDataFunc sort = &hottest;
     int i = 0;
 
     g_mutex_lock(&node_lock);
@@ -162,7 +162,7 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
         break;
     }
 
-    data = g_list_sort(data, sort);
+    data = g_list_sort_with_data(data, sort, NULL);
 
     for (GList *l = data;
          l != NULL && i < topn;
diff --git a/contrib/plugins/hotblocks.c b/contrib/plugins/hotblocks.c
index f12bfb7a26..98404b6885 100644
--- a/contrib/plugins/hotblocks.c
+++ b/contrib/plugins/hotblocks.c
@@ -39,7 +39,7 @@ typedef struct {
     unsigned long insns;
 } ExecCount;
 
-static gint cmp_exec_count(gconstpointer a, gconstpointer b)
+static gint cmp_exec_count(gconstpointer a, gconstpointer b, gpointer d)
 {
     ExecCount *ea = (ExecCount *) a;
     ExecCount *eb = (ExecCount *) b;
@@ -79,7 +79,7 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
     g_string_append_printf(report, "%d entries in the hash table\n",
                            g_hash_table_size(hotblocks));
     counts = g_hash_table_get_values(hotblocks);
-    it = g_list_sort(counts, cmp_exec_count);
+    it = g_list_sort_with_data(counts, cmp_exec_count, NULL);
 
     if (it) {
         g_string_append_printf(report, "pc, tcount, icount, ecount\n");
diff --git a/contrib/plugins/hotpages.c b/contrib/plugins/hotpages.c
index c6e6493719..9d48ac969e 100644
--- a/contrib/plugins/hotpages.c
+++ b/contrib/plugins/hotpages.c
@@ -48,7 +48,7 @@ typedef struct {
 static GMutex lock;
 static GHashTable *pages;
 
-static gint cmp_access_count(gconstpointer a, gconstpointer b)
+static gint cmp_access_count(gconstpointer a, gconstpointer b, gpointer d)
 {
     PageCounters *ea = (PageCounters *) a;
     PageCounters *eb = (PageCounters *) b;
@@ -83,7 +83,7 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
     if (counts && g_list_next(counts)) {
         GList *it;
 
-        it = g_list_sort(counts, cmp_access_count);
+        it = g_list_sort_with_data(counts, cmp_access_count, NULL);
 
         for (i = 0; i < limit && it->next; i++, it = it->next) {
             PageCounters *rec = (PageCounters *) it->data;
diff --git a/contrib/plugins/howvec.c b/contrib/plugins/howvec.c
index 2aa9029c3f..42bddb6566 100644
--- a/contrib/plugins/howvec.c
+++ b/contrib/plugins/howvec.c
@@ -155,7 +155,7 @@ static ClassSelector class_tables[] = {
 static InsnClassExecCount *class_table;
 static int class_table_sz;
 
-static gint cmp_exec_count(gconstpointer a, gconstpointer b)
+static gint cmp_exec_count(gconstpointer a, gconstpointer b, gpointer d)
 {
     InsnExecCount *ea = (InsnExecCount *) a;
     InsnExecCount *eb = (InsnExecCount *) b;
@@ -208,7 +208,7 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
     counts = g_hash_table_get_values(insns);
     if (counts && g_list_next(counts)) {
         g_string_append_printf(report, "Individual Instructions:\n");
-        counts = g_list_sort(counts, cmp_exec_count);
+        counts = g_list_sort_with_data(counts, cmp_exec_count, NULL);
 
         for (i = 0; i < limit && g_list_next(counts);
              i++, counts = g_list_next(counts)) {
diff --git a/contrib/plugins/hwprofile.c b/contrib/plugins/hwprofile.c
index 2a4cbc47d4..a9838ccc87 100644
--- a/contrib/plugins/hwprofile.c
+++ b/contrib/plugins/hwprofile.c
@@ -71,7 +71,7 @@ static void plugin_init(void)
     devices = g_hash_table_new(NULL, NULL);
 }
 
-static gint sort_cmp(gconstpointer a, gconstpointer b)
+static gint sort_cmp(gconstpointer a, gconstpointer b, gpointer d)
 {
     DeviceCounts *ea = (DeviceCounts *) a;
     DeviceCounts *eb = (DeviceCounts *) b;
@@ -79,7 +79,7 @@ static gint sort_cmp(gconstpointer a, gconstpointer b)
            eb->totals.reads + eb->totals.writes ? -1 : 1;
 }
 
-static gint sort_loc(gconstpointer a, gconstpointer b)
+static gint sort_loc(gconstpointer a, gconstpointer b, gpointer d)
 {
     IOLocationCounts *ea = (IOLocationCounts *) a;
     IOLocationCounts *eb = (IOLocationCounts *) b;
@@ -126,13 +126,13 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
     if (counts && g_list_next(counts)) {
         GList *it;
 
-        it = g_list_sort(counts, sort_cmp);
+        it = g_list_sort_with_data(counts, sort_cmp, NULL);
 
         while (it) {
             DeviceCounts *rec = (DeviceCounts *) it->data;
             if (rec->detail) {
                 GList *accesses = g_hash_table_get_values(rec->detail);
-                GList *io_it = g_list_sort(accesses, sort_loc);
+                GList *io_it = g_list_sort_with_data(accesses, sort_loc, NULL);
                 const char *prefix = pattern ? "off" : "pc";
                 g_string_append_printf(report, "%s @ 0x%"PRIx64"\n",
                                        rec->name, rec->base);
diff --git a/cpu-target.c b/cpu-target.c
index 14cd623bff..1c90a30759 100644
--- a/cpu-target.c
+++ b/cpu-target.c
@@ -19,94 +19,19 @@
 
 #include "qemu/osdep.h"
 #include "cpu.h"
-#include "qapi/error.h"
-#include "qemu/error-report.h"
-#include "qemu/qemu-print.h"
 #include "system/accel-ops.h"
 #include "system/cpus.h"
 #include "exec/cpu-common.h"
 #include "exec/tswap.h"
 #include "exec/replay-core.h"
 #include "exec/log.h"
-#include "accel/accel-cpu-target.h"
+#include "hw/core/cpu.h"
 #include "trace/trace-root.h"
 
 /* Validate correct placement of CPUArchState. */
 QEMU_BUILD_BUG_ON(offsetof(ArchCPU, parent_obj) != 0);
 QEMU_BUILD_BUG_ON(offsetof(ArchCPU, env) != sizeof(CPUState));
 
-char *cpu_model_from_type(const char *typename)
-{
-    const char *suffix = "-" CPU_RESOLVING_TYPE;
-
-    if (!object_class_by_name(typename)) {
-        return NULL;
-    }
-
-    if (g_str_has_suffix(typename, suffix)) {
-        return g_strndup(typename, strlen(typename) - strlen(suffix));
-    }
-
-    return g_strdup(typename);
-}
-
-const char *parse_cpu_option(const char *cpu_option)
-{
-    ObjectClass *oc;
-    CPUClass *cc;
-    gchar **model_pieces;
-    const char *cpu_type;
-
-    model_pieces = g_strsplit(cpu_option, ",", 2);
-    if (!model_pieces[0]) {
-        error_report("-cpu option cannot be empty");
-        exit(1);
-    }
-
-    oc = cpu_class_by_name(CPU_RESOLVING_TYPE, model_pieces[0]);
-    if (oc == NULL) {
-        error_report("unable to find CPU model '%s'", model_pieces[0]);
-        g_strfreev(model_pieces);
-        exit(EXIT_FAILURE);
-    }
-
-    cpu_type = object_class_get_name(oc);
-    cc = CPU_CLASS(oc);
-    cc->parse_features(cpu_type, model_pieces[1], &error_fatal);
-    g_strfreev(model_pieces);
-    return cpu_type;
-}
-
-#ifndef cpu_list
-static void cpu_list_entry(gpointer data, gpointer user_data)
-{
-    CPUClass *cc = CPU_CLASS(OBJECT_CLASS(data));
-    const char *typename = object_class_get_name(OBJECT_CLASS(data));
-    g_autofree char *model = cpu_model_from_type(typename);
-
-    if (cc->deprecation_note) {
-        qemu_printf("  %s (deprecated)\n", model);
-    } else {
-        qemu_printf("  %s\n", model);
-    }
-}
-
-static void cpu_list(void)
-{
-    GSList *list;
-
-    list = object_class_get_list_sorted(TYPE_CPU, false);
-    qemu_printf("Available CPUs:\n");
-    g_slist_foreach(list, cpu_list_entry, NULL);
-    g_slist_free(list);
-}
-#endif
-
-void list_cpus(void)
-{
-    cpu_list();
-}
-
 /* enable or disable single step mode. EXCP_DEBUG is returned by the
    CPU loop after each instruction */
 void cpu_single_step(CPUState *cpu, int enabled)
@@ -161,13 +86,8 @@ void cpu_abort(CPUState *cpu, const char *fmt, ...)
     abort();
 }
 
-#undef target_words_bigendian
-bool target_words_bigendian(void)
+#undef target_big_endian
+bool target_big_endian(void)
 {
     return TARGET_BIG_ENDIAN;
 }
-
-const char *target_name(void)
-{
-    return TARGET_NAME;
-}
diff --git a/crypto/secret.c b/crypto/secret.c
index 44eaff16f6..61a4584286 100644
--- a/crypto/secret.c
+++ b/crypto/secret.c
@@ -117,7 +117,7 @@ qcrypto_secret_finalize(Object *obj)
 }
 
 static void
-qcrypto_secret_class_init(ObjectClass *oc, void *data)
+qcrypto_secret_class_init(ObjectClass *oc, const void *data)
 {
     QCryptoSecretCommonClass *sic = QCRYPTO_SECRET_COMMON_CLASS(oc);
     sic->load_data = qcrypto_secret_load_data;
diff --git a/crypto/secret_common.c b/crypto/secret_common.c
index dbda998940..a5ecb876ae 100644
--- a/crypto/secret_common.c
+++ b/crypto/secret_common.c
@@ -263,7 +263,7 @@ qcrypto_secret_finalize(Object *obj)
 }
 
 static void
-qcrypto_secret_class_init(ObjectClass *oc, void *data)
+qcrypto_secret_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -375,7 +375,7 @@ static const TypeInfo qcrypto_secret_info = {
     .class_size = sizeof(QCryptoSecretCommonClass),
     .class_init = qcrypto_secret_class_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/crypto/secret_keyring.c b/crypto/secret_keyring.c
index 1b7edec84a..78d7f09b3b 100644
--- a/crypto/secret_keyring.c
+++ b/crypto/secret_keyring.c
@@ -103,7 +103,7 @@ qcrypto_secret_prop_get_key(Object *obj, Visitor *v,
 
 
 static void
-qcrypto_secret_keyring_class_init(ObjectClass *oc, void *data)
+qcrypto_secret_keyring_class_init(ObjectClass *oc, const void *data)
 {
     QCryptoSecretCommonClass *sic = QCRYPTO_SECRET_COMMON_CLASS(oc);
     sic->load_data = qcrypto_secret_keyring_load_data;
diff --git a/crypto/tls-cipher-suites.c b/crypto/tls-cipher-suites.c
index d0df4badc0..d9b61d0c08 100644
--- a/crypto/tls-cipher-suites.c
+++ b/crypto/tls-cipher-suites.c
@@ -102,7 +102,8 @@ static GByteArray *qcrypto_tls_cipher_suites_fw_cfg_gen_data(Object *obj,
                                               errp);
 }
 
-static void qcrypto_tls_cipher_suites_class_init(ObjectClass *oc, void *data)
+static void qcrypto_tls_cipher_suites_class_init(ObjectClass *oc,
+                                                 const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
     FWCfgDataGeneratorClass *fwgc = FW_CFG_DATA_GENERATOR_CLASS(oc);
@@ -117,7 +118,7 @@ static const TypeInfo qcrypto_tls_cipher_suites_info = {
     .instance_size = sizeof(QCryptoTLSCipherSuites),
     .class_size = sizeof(QCryptoTLSCredsClass),
     .class_init = qcrypto_tls_cipher_suites_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { TYPE_FW_CFG_DATA_GENERATOR_INTERFACE },
         { }
diff --git a/crypto/tlscreds.c b/crypto/tlscreds.c
index 084ce0d51a..9e59594d67 100644
--- a/crypto/tlscreds.c
+++ b/crypto/tlscreds.c
@@ -223,7 +223,7 @@ qcrypto_tls_creds_prop_get_endpoint(Object *obj,
 
 
 static void
-qcrypto_tls_creds_class_init(ObjectClass *oc, void *data)
+qcrypto_tls_creds_class_init(ObjectClass *oc, const void *data)
 {
     object_class_property_add_bool(oc, "verify-peer",
                                    qcrypto_tls_creds_prop_get_verify,
diff --git a/crypto/tlscredsanon.c b/crypto/tlscredsanon.c
index 476cf89c96..44af9e6c9a 100644
--- a/crypto/tlscredsanon.c
+++ b/crypto/tlscredsanon.c
@@ -137,7 +137,7 @@ qcrypto_tls_creds_anon_finalize(Object *obj)
 
 
 static void
-qcrypto_tls_creds_anon_class_init(ObjectClass *oc, void *data)
+qcrypto_tls_creds_anon_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -152,7 +152,7 @@ static const TypeInfo qcrypto_tls_creds_anon_info = {
     .instance_finalize = qcrypto_tls_creds_anon_finalize,
     .class_size = sizeof(QCryptoTLSCredsAnonClass),
     .class_init = qcrypto_tls_creds_anon_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/crypto/tlscredspsk.c b/crypto/tlscredspsk.c
index aa270d7988..5b68a6b7ba 100644
--- a/crypto/tlscredspsk.c
+++ b/crypto/tlscredspsk.c
@@ -236,7 +236,7 @@ qcrypto_tls_creds_psk_prop_get_username(Object *obj,
 }
 
 static void
-qcrypto_tls_creds_psk_class_init(ObjectClass *oc, void *data)
+qcrypto_tls_creds_psk_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -255,7 +255,7 @@ static const TypeInfo qcrypto_tls_creds_psk_info = {
     .instance_finalize = qcrypto_tls_creds_psk_finalize,
     .class_size = sizeof(QCryptoTLSCredsPSKClass),
     .class_init = qcrypto_tls_creds_psk_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/crypto/tlscredsx509.c b/crypto/tlscredsx509.c
index 24ec584922..63a72fe47c 100644
--- a/crypto/tlscredsx509.c
+++ b/crypto/tlscredsx509.c
@@ -802,7 +802,7 @@ qcrypto_tls_creds_x509_finalize(Object *obj)
 
 
 static void
-qcrypto_tls_creds_x509_class_init(ObjectClass *oc, void *data)
+qcrypto_tls_creds_x509_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
     QCryptoTLSCredsClass *ctcc = QCRYPTO_TLS_CREDS_CLASS(oc);
@@ -828,7 +828,7 @@ static const TypeInfo qcrypto_tls_creds_x509_info = {
     .instance_finalize = qcrypto_tls_creds_x509_finalize,
     .class_size = sizeof(QCryptoTLSCredsX509Class),
     .class_init = qcrypto_tls_creds_x509_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/docs/devel/qom.rst b/docs/devel/qom.rst
index 0889ca949c..5870745ba2 100644
--- a/docs/devel/qom.rst
+++ b/docs/devel/qom.rst
@@ -147,7 +147,7 @@ to introduce an overridden virtual function:
 
    #include "qdev.h"
 
-   void my_device_class_init(ObjectClass *klass, void *class_data)
+   void my_device_class_init(ObjectClass *klass, const void *class_data)
    {
        DeviceClass *dc = DEVICE_CLASS(klass);
        dc->reset = my_device_reset;
@@ -249,7 +249,7 @@ class, which someone might choose to change at some point.
        // do something
    }
 
-   static void my_class_init(ObjectClass *oc, void *data)
+   static void my_class_init(ObjectClass *oc, const void *data)
    {
        MyClass *mc = MY_CLASS(oc);
 
@@ -279,7 +279,7 @@ class, which someone might choose to change at some point.
        // do something else here
    }
 
-   static void derived_class_init(ObjectClass *oc, void *data)
+   static void derived_class_init(ObjectClass *oc, const void *data)
    {
        MyClass *mc = MY_CLASS(oc);
        DerivedClass *dc = DERIVED_CLASS(oc);
@@ -363,7 +363,7 @@ This is equivalent to the following:
    :caption: Expansion from defining a simple type
 
    static void my_device_finalize(Object *obj);
-   static void my_device_class_init(ObjectClass *oc, void *data);
+   static void my_device_class_init(ObjectClass *oc, const void *data);
    static void my_device_init(Object *obj);
 
    static const TypeInfo my_device_info = {
diff --git a/docs/devel/reset.rst b/docs/devel/reset.rst
index 0b8b2fa5f4..c02fe0a405 100644
--- a/docs/devel/reset.rst
+++ b/docs/devel/reset.rst
@@ -216,7 +216,7 @@ in reset.
         ResettablePhases parent_phases;
     } MyDevClass;
 
-    static void mydev_class_init(ObjectClass *class, void *data)
+    static void mydev_class_init(ObjectClass *class, const void *data)
     {
         MyDevClass *myclass = MYDEV_CLASS(class);
         ResettableClass *rc = RESETTABLE_CLASS(class);
diff --git a/docs/devel/virtio-backends.rst b/docs/devel/virtio-backends.rst
index 679d7544b8..ebddc3b9f5 100644
--- a/docs/devel/virtio-backends.rst
+++ b/docs/devel/virtio-backends.rst
@@ -119,7 +119,7 @@ manually instantiated:
       qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
   }
 
-  static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
+  static void virtio_blk_pci_class_init(ObjectClass *klass, const void *data)
   {
       DeviceClass *dc = DEVICE_CLASS(klass);
       VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/event-loop-base.c b/event-loop-base.c
index ddf8400a6b..8ca143bea4 100644
--- a/event-loop-base.c
+++ b/event-loop-base.c
@@ -97,7 +97,8 @@ static bool event_loop_base_can_be_deleted(UserCreatable *uc)
     return true;
 }
 
-static void event_loop_base_class_init(ObjectClass *klass, void *class_data)
+static void event_loop_base_class_init(ObjectClass *klass,
+                                       const void *class_data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(klass);
     ucc->complete = event_loop_base_complete;
@@ -125,7 +126,7 @@ static const TypeInfo event_loop_base_info = {
     .class_size = sizeof(EventLoopBaseClass),
     .class_init = event_loop_base_class_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 282e13e163..565f6b33a9 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -565,15 +565,30 @@ static void gdb_register_feature(CPUState *cpu, int base_reg,
     g_array_append_val(cpu->gdb_regs, s);
 }
 
+static const char *gdb_get_core_xml_file(CPUState *cpu)
+{
+    CPUClass *cc = cpu->cc;
+
+    /*
+     * The CPU class can provide the XML filename via a method,
+     * or as a simple fixed string field.
+     */
+    if (cc->gdb_get_core_xml_file) {
+        return cc->gdb_get_core_xml_file(cpu);
+    }
+    return cc->gdb_core_xml_file;
+}
+
 void gdb_init_cpu(CPUState *cpu)
 {
     CPUClass *cc = cpu->cc;
     const GDBFeature *feature;
+    const char *xmlfile = gdb_get_core_xml_file(cpu);
 
     cpu->gdb_regs = g_array_new(false, false, sizeof(GDBRegisterState));
 
-    if (cc->gdb_core_xml_file) {
-        feature = gdb_find_static_feature(cc->gdb_core_xml_file);
+    if (xmlfile) {
+        feature = gdb_find_static_feature(xmlfile);
         gdb_register_feature(cpu, 0,
                              cc->gdb_read_register, cc->gdb_write_register,
                              feature);
@@ -1644,7 +1659,7 @@ void gdb_extend_qsupported_features(char *qflags)
 static void handle_query_supported(GArray *params, void *user_ctx)
 {
     g_string_printf(gdbserver_state.str_buf, "PacketSize=%x", MAX_PACKET_LENGTH);
-    if (first_cpu->cc->gdb_core_xml_file) {
+    if (gdb_get_core_xml_file(first_cpu)) {
         g_string_append(gdbserver_state.str_buf, ";qXfer:features:read+");
     }
 
@@ -1701,7 +1716,7 @@ static void handle_query_xfer_features(GArray *params, void *user_ctx)
     }
 
     process = gdb_get_cpu_process(gdbserver_state.g_cpu);
-    if (!gdbserver_state.g_cpu->cc->gdb_core_xml_file) {
+    if (!gdb_get_core_xml_file(gdbserver_state.g_cpu)) {
         gdb_put_packet("");
         return;
     }
diff --git a/gdbstub/system.c b/gdbstub/system.c
index dd22ff0fb3..8a32d8e1a1 100644
--- a/gdbstub/system.c
+++ b/gdbstub/system.c
@@ -243,7 +243,7 @@ static void gdb_monitor_open(Chardev *chr, ChardevBackend *backend,
     *be_opened = false;
 }
 
-static void char_gdb_class_init(ObjectClass *oc, void *data)
+static void char_gdb_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index bb2843da0f..81b91e47c6 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -248,7 +248,7 @@ static const Property virtio_9p_properties[] = {
     DEFINE_PROP_STRING("fsdev", V9fsVirtioState, state.fsconf.fsdev_id),
 };
 
-static void virtio_9p_class_init(ObjectClass *klass, void *data)
+static void virtio_9p_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/acpi/erst.c b/hw/acpi/erst.c
index 2e49b551f2..099cabb7ab 100644
--- a/hw/acpi/erst.c
+++ b/hw/acpi/erst.c
@@ -1018,7 +1018,7 @@ static const Property erst_properties[] = {
                      default_record_size, ERST_RECORD_SIZE),
 };
 
-static void erst_class_init(ObjectClass *klass, void *data)
+static void erst_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1044,7 +1044,7 @@ static const TypeInfo erst_type_info = {
     .parent        = TYPE_PCI_DEVICE,
     .class_init    = erst_class_init,
     .instance_size = sizeof(ERSTDeviceState),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
     }
diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index c85d97ca37..d8adfea648 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -469,7 +469,7 @@ static void acpi_ged_initfn(Object *obj)
     sysbus_init_mmio(sbd, &ged_st->regs);
 }
 
-static void acpi_ged_class_init(ObjectClass *class, void *data)
+static void acpi_ged_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(class);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(class);
@@ -494,7 +494,7 @@ static const TypeInfo acpi_ged_info = {
     .instance_size = sizeof(AcpiGedState),
     .instance_init  = acpi_ged_initfn,
     .class_init    = acpi_ged_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { TYPE_ACPI_DEVICE_IF },
         { }
diff --git a/hw/acpi/pci.c b/hw/acpi/pci.c
index f88f450af3..d511a85029 100644
--- a/hw/acpi/pci.c
+++ b/hw/acpi/pci.c
@@ -133,7 +133,7 @@ static void acpi_generic_initiator_set_node(Object *obj, Visitor *v,
     ms->numa_state->nodes[gi->node].has_gi = true;
 }
 
-static void acpi_generic_initiator_class_init(ObjectClass *oc, void *data)
+static void acpi_generic_initiator_class_init(ObjectClass *oc, const void *data)
 {
     object_class_property_add_str(oc, "pci-dev", NULL,
         acpi_generic_initiator_set_pci_device);
@@ -247,7 +247,7 @@ static void acpi_generic_port_set_node(Object *obj, Visitor *v,
     gp->node = value;
 }
 
-static void acpi_generic_port_class_init(ObjectClass *oc, void *data)
+static void acpi_generic_port_class_init(ObjectClass *oc, const void *data)
 {
     object_class_property_add_str(oc, "pci-bus", NULL,
         acpi_generic_port_set_pci_bus);
diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 6d023e595b..b16d45f03e 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -619,7 +619,7 @@ static const Property piix4_pm_properties[] = {
                       not_migrate_acpi_index, false),
 };
 
-static void piix4_pm_class_init(ObjectClass *klass, void *data)
+static void piix4_pm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -657,7 +657,7 @@ static const TypeInfo piix4_pm_info = {
     .instance_init  = piix4_pm_init,
     .instance_size = sizeof(PIIX4PMState),
     .class_init    = piix4_pm_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { TYPE_ACPI_DEVICE_IF },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
diff --git a/hw/acpi/vmclock.c b/hw/acpi/vmclock.c
index 7387e5c9ca..c582c0c1f8 100644
--- a/hw/acpi/vmclock.c
+++ b/hw/acpi/vmclock.c
@@ -154,7 +154,7 @@ static void vmclock_realize(DeviceState *dev, Error **errp)
     vmclock_update_guest(vms);
 }
 
-static void vmclock_device_class_init(ObjectClass *klass, void *data)
+static void vmclock_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/acpi/vmgenid.c b/hw/acpi/vmgenid.c
index 008768e036..fac3d6d97e 100644
--- a/hw/acpi/vmgenid.c
+++ b/hw/acpi/vmgenid.c
@@ -218,7 +218,7 @@ static const Property vmgenid_device_properties[] = {
     DEFINE_PROP_UUID(VMGENID_GUID, VmGenIdState, guid),
 };
 
-static void vmgenid_device_class_init(ObjectClass *klass, void *data)
+static void vmgenid_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/adc/aspeed_adc.c b/hw/adc/aspeed_adc.c
index 1cc554f179..3e820cae1e 100644
--- a/hw/adc/aspeed_adc.c
+++ b/hw/adc/aspeed_adc.c
@@ -291,7 +291,7 @@ static const Property aspeed_adc_engine_properties[] = {
     DEFINE_PROP_UINT32("nr-channels", AspeedADCEngineState, nr_channels, 0),
 };
 
-static void aspeed_adc_engine_class_init(ObjectClass *klass, void *data)
+static void aspeed_adc_engine_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -369,7 +369,7 @@ static void aspeed_adc_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void aspeed_adc_class_init(ObjectClass *klass, void *data)
+static void aspeed_adc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedADCClass *aac = ASPEED_ADC_CLASS(klass);
@@ -379,7 +379,7 @@ static void aspeed_adc_class_init(ObjectClass *klass, void *data)
     aac->nr_engines = 1;
 }
 
-static void aspeed_2600_adc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_adc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedADCClass *aac = ASPEED_ADC_CLASS(klass);
@@ -388,7 +388,7 @@ static void aspeed_2600_adc_class_init(ObjectClass *klass, void *data)
     aac->nr_engines = 2;
 }
 
-static void aspeed_1030_adc_class_init(ObjectClass *klass, void *data)
+static void aspeed_1030_adc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedADCClass *aac = ASPEED_ADC_CLASS(klass);
@@ -397,7 +397,7 @@ static void aspeed_1030_adc_class_init(ObjectClass *klass, void *data)
     aac->nr_engines = 2;
 }
 
-static void aspeed_2700_adc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_adc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedADCClass *aac = ASPEED_ADC_CLASS(klass);
diff --git a/hw/adc/npcm7xx_adc.c b/hw/adc/npcm7xx_adc.c
index 0a83d28605..ddb219d456 100644
--- a/hw/adc/npcm7xx_adc.c
+++ b/hw/adc/npcm7xx_adc.c
@@ -271,7 +271,7 @@ static const Property npcm7xx_timer_properties[] = {
     DEFINE_PROP_UINT32("iref", NPCM7xxADCState, iref, NPCM7XX_ADC_DEFAULT_IREF),
 };
 
-static void npcm7xx_adc_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_adc_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/adc/stm32f2xx_adc.c b/hw/adc/stm32f2xx_adc.c
index e3b21f9077..a490ae640d 100644
--- a/hw/adc/stm32f2xx_adc.c
+++ b/hw/adc/stm32f2xx_adc.c
@@ -284,7 +284,7 @@ static void stm32f2xx_adc_init(Object *obj)
     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 }
 
-static void stm32f2xx_adc_class_init(ObjectClass *klass, void *data)
+static void stm32f2xx_adc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/adc/zynq-xadc.c b/hw/adc/zynq-xadc.c
index 26d9a7b9a5..748a51ba78 100644
--- a/hw/adc/zynq-xadc.c
+++ b/hw/adc/zynq-xadc.c
@@ -281,7 +281,7 @@ static const VMStateDescription vmstate_zynq_xadc = {
     }
 };
 
-static void zynq_xadc_class_init(ObjectClass *klass, void *data)
+static void zynq_xadc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/alpha/typhoon.c b/hw/alpha/typhoon.c
index 9718e1a579..4c56f981d7 100644
--- a/hw/alpha/typhoon.c
+++ b/hw/alpha/typhoon.c
@@ -935,7 +935,7 @@ static const TypeInfo typhoon_pcihost_info = {
 };
 
 static void typhoon_iommu_memory_region_class_init(ObjectClass *klass,
-                                                   void *data)
+                                                   const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/arm/allwinner-a10.c b/hw/arm/allwinner-a10.c
index f1b399759a..dc910d4177 100644
--- a/hw/arm/allwinner-a10.c
+++ b/hw/arm/allwinner-a10.c
@@ -208,7 +208,7 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->wdt), 0, AW_A10_WDT_BASE, 1);
 }
 
-static void aw_a10_class_init(ObjectClass *oc, void *data)
+static void aw_a10_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/allwinner-h3.c b/hw/arm/allwinner-h3.c
index 1b1afa4fb6..edffc21dd8 100644
--- a/hw/arm/allwinner-h3.c
+++ b/hw/arm/allwinner-h3.c
@@ -466,7 +466,7 @@ static void allwinner_h3_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void allwinner_h3_class_init(ObjectClass *oc, void *data)
+static void allwinner_h3_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/allwinner-r40.c b/hw/arm/allwinner-r40.c
index cef6e4d18c..0bf700865c 100644
--- a/hw/arm/allwinner-r40.c
+++ b/hw/arm/allwinner-r40.c
@@ -539,7 +539,7 @@ static void allwinner_r40_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void allwinner_r40_class_init(ObjectClass *oc, void *data)
+static void allwinner_r40_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
index ffd732f806..50ab7f4810 100644
--- a/hw/arm/armsse.c
+++ b/hw/arm/armsse.c
@@ -1691,7 +1691,7 @@ static void armsse_reset(DeviceState *dev)
     s->nsccfg = 0;
 }
 
-static void armsse_class_init(ObjectClass *klass, void *data)
+static void armsse_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IDAUInterfaceClass *iic = IDAU_INTERFACE_CLASS(klass);
@@ -1713,7 +1713,7 @@ static const TypeInfo armsse_info = {
     .class_size = sizeof(ARMSSEClass),
     .instance_init = armsse_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_IDAU_INTERFACE },
         { }
     }
@@ -1730,7 +1730,7 @@ static void armsse_register_types(void)
             .name = armsse_variants[i].name,
             .parent = TYPE_ARM_SSE,
             .class_init = armsse_class_init,
-            .class_data = (void *)&armsse_variants[i],
+            .class_data = &armsse_variants[i],
         };
         type_register_static(&ti);
     }
diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index 64009174b9..cea3eb49ee 100644
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -565,7 +565,7 @@ static const VMStateDescription vmstate_armv7m = {
     }
 };
 
-static void armv7m_class_init(ObjectClass *klass, void *data)
+static void armv7m_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -636,7 +636,7 @@ static const Property bitband_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void bitband_class_init(ObjectClass *klass, void *data)
+static void bitband_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index 82f42582fa..20f418fb63 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -1227,7 +1227,7 @@ static void aspeed_machine_ast2600_class_emmc_init(ObjectClass *oc)
                                           "Set or unset boot from EMMC");
 }
 
-static void aspeed_machine_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1243,7 +1243,8 @@ static void aspeed_machine_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_props_init(oc);
 }
 
-static void aspeed_machine_palmetto_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_palmetto_class_init(ObjectClass *oc,
+                                               const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1260,7 +1261,8 @@ static void aspeed_machine_palmetto_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 };
 
-static void aspeed_machine_quanta_q71l_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_quanta_q71l_class_init(ObjectClass *oc,
+                                                  const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1278,7 +1280,7 @@ static void aspeed_machine_quanta_q71l_class_init(ObjectClass *oc, void *data)
 }
 
 static void aspeed_machine_supermicrox11_bmc_class_init(ObjectClass *oc,
-                                                        void *data)
+                                                        const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1297,7 +1299,7 @@ static void aspeed_machine_supermicrox11_bmc_class_init(ObjectClass *oc,
 }
 
 static void aspeed_machine_supermicro_x11spi_bmc_class_init(ObjectClass *oc,
-                                                            void *data)
+                                                            const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1315,7 +1317,8 @@ static void aspeed_machine_supermicro_x11spi_bmc_class_init(ObjectClass *oc,
     aspeed_machine_class_init_cpus_defaults(mc);
 }
 
-static void aspeed_machine_ast2500_evb_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_ast2500_evb_class_init(ObjectClass *oc,
+                                                  const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1332,7 +1335,8 @@ static void aspeed_machine_ast2500_evb_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 };
 
-static void aspeed_machine_yosemitev2_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_yosemitev2_class_init(ObjectClass *oc,
+                                                 const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1350,7 +1354,8 @@ static void aspeed_machine_yosemitev2_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 };
 
-static void aspeed_machine_romulus_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_romulus_class_init(ObjectClass *oc,
+                                              const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1367,7 +1372,8 @@ static void aspeed_machine_romulus_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 };
 
-static void aspeed_machine_tiogapass_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_tiogapass_class_init(ObjectClass *oc,
+                                                const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1385,7 +1391,8 @@ static void aspeed_machine_tiogapass_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 };
 
-static void aspeed_machine_sonorapass_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_sonorapass_class_init(ObjectClass *oc,
+                                                 const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1402,7 +1409,8 @@ static void aspeed_machine_sonorapass_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 };
 
-static void aspeed_machine_witherspoon_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_witherspoon_class_init(ObjectClass *oc,
+                                                  const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1419,7 +1427,8 @@ static void aspeed_machine_witherspoon_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 };
 
-static void aspeed_machine_ast2600_evb_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_ast2600_evb_class_init(ObjectClass *oc,
+                                                  const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1441,7 +1450,7 @@ static void aspeed_machine_ast2600_evb_class_init(ObjectClass *oc, void *data)
     aspeed_machine_ast2600_class_emmc_init(oc);
 };
 
-static void aspeed_machine_g220a_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_g220a_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1459,7 +1468,8 @@ static void aspeed_machine_g220a_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 };
 
-static void aspeed_machine_fp5280g2_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_fp5280g2_class_init(ObjectClass *oc,
+                                               const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1477,7 +1487,7 @@ static void aspeed_machine_fp5280g2_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 };
 
-static void aspeed_machine_rainier_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_rainier_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1499,7 +1509,7 @@ static void aspeed_machine_rainier_class_init(ObjectClass *oc, void *data)
 
 #define FUJI_BMC_RAM_SIZE ASPEED_RAM_SIZE(2 * GiB)
 
-static void aspeed_machine_fuji_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_fuji_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1521,7 +1531,8 @@ static void aspeed_machine_fuji_class_init(ObjectClass *oc, void *data)
 
 #define BLETCHLEY_BMC_RAM_SIZE ASPEED_RAM_SIZE(2 * GiB)
 
-static void aspeed_machine_bletchley_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_bletchley_class_init(ObjectClass *oc,
+                                                const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1566,7 +1577,7 @@ static void fby35_reset(MachineState *state, ResetType type)
     object_property_set_bool(OBJECT(gpio), "gpioB5", false, &error_fatal);
 }
 
-static void aspeed_machine_fby35_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_fby35_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1644,7 +1655,7 @@ static void ast1030_evb_i2c_init(AspeedMachineState *bmc)
 }
 
 static void aspeed_minibmc_machine_ast1030_evb_class_init(ObjectClass *oc,
-                                                          void *data)
+                                                          const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1673,7 +1684,8 @@ static void ast2700_evb_i2c_init(AspeedMachineState *bmc)
                             TYPE_TMP105, 0x4d);
 }
 
-static void aspeed_machine_ast2700a0_evb_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_ast2700a0_evb_class_init(ObjectClass *oc,
+                                                    const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1694,7 +1706,8 @@ static void aspeed_machine_ast2700a0_evb_class_init(ObjectClass *oc, void *data)
     aspeed_machine_class_init_cpus_defaults(mc);
 }
 
-static void aspeed_machine_ast2700a1_evb_class_init(ObjectClass *oc, void *data)
+static void aspeed_machine_ast2700a1_evb_class_init(ObjectClass *oc,
+                                                    const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1716,7 +1729,7 @@ static void aspeed_machine_ast2700a1_evb_class_init(ObjectClass *oc, void *data)
 #endif
 
 static void aspeed_machine_qcom_dc_scm_v1_class_init(ObjectClass *oc,
-                                                     void *data)
+                                                     const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
@@ -1736,7 +1749,7 @@ static void aspeed_machine_qcom_dc_scm_v1_class_init(ObjectClass *oc,
 };
 
 static void aspeed_machine_qcom_firework_class_init(ObjectClass *oc,
-                                                    void *data)
+                                                    const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
diff --git a/hw/arm/aspeed_ast10x0.c b/hw/arm/aspeed_ast10x0.c
index 21ffab10f3..e6e1ee63c1 100644
--- a/hw/arm/aspeed_ast10x0.c
+++ b/hw/arm/aspeed_ast10x0.c
@@ -415,7 +415,7 @@ static void aspeed_soc_ast1030_realize(DeviceState *dev_soc, Error **errp)
                                   sc->memmap[ASPEED_DEV_JTAG1], 0x20);
 }
 
-static void aspeed_soc_ast1030_class_init(ObjectClass *klass, void *data)
+static void aspeed_soc_ast1030_class_init(ObjectClass *klass, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("cortex-m4"), /* TODO cortex-m4f */
diff --git a/hw/arm/aspeed_ast2400.c b/hw/arm/aspeed_ast2400.c
index 0158f6e9c2..c7b0f21887 100644
--- a/hw/arm/aspeed_ast2400.c
+++ b/hw/arm/aspeed_ast2400.c
@@ -502,7 +502,7 @@ static void aspeed_ast2400_soc_realize(DeviceState *dev, Error **errp)
                        aspeed_soc_get_irq(s, ASPEED_DEV_HACE));
 }
 
-static void aspeed_soc_ast2400_class_init(ObjectClass *oc, void *data)
+static void aspeed_soc_ast2400_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("arm926"),
@@ -530,7 +530,7 @@ static void aspeed_soc_ast2400_class_init(ObjectClass *oc, void *data)
     sc->get_irq      = aspeed_soc_ast2400_get_irq;
 }
 
-static void aspeed_soc_ast2500_class_init(ObjectClass *oc, void *data)
+static void aspeed_soc_ast2500_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("arm1176"),
diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index 1f994ba26c..d12707f0ab 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -653,7 +653,7 @@ static bool aspeed_soc_ast2600_boot_from_emmc(AspeedSoCState *s)
     return !!(hw_strap1 & SCU_AST2600_HW_STRAP_BOOT_SRC_EMMC);
 }
 
-static void aspeed_soc_ast2600_class_init(ObjectClass *oc, void *data)
+static void aspeed_soc_ast2600_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("cortex-a7"),
diff --git a/hw/arm/aspeed_ast27x0.c b/hw/arm/aspeed_ast27x0.c
index dce7255a2c..63a366f7e8 100644
--- a/hw/arm/aspeed_ast27x0.c
+++ b/hw/arm/aspeed_ast27x0.c
@@ -883,7 +883,7 @@ static void aspeed_soc_ast2700_realize(DeviceState *dev, Error **errp)
     create_unimplemented_device("ast2700.io", 0x0, 0x4000000);
 }
 
-static void aspeed_soc_ast2700a0_class_init(ObjectClass *oc, void *data)
+static void aspeed_soc_ast2700a0_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("cortex-a35"),
@@ -910,7 +910,7 @@ static void aspeed_soc_ast2700a0_class_init(ObjectClass *oc, void *data)
     sc->get_irq      = aspeed_soc_ast2700_get_irq;
 }
 
-static void aspeed_soc_ast2700a1_class_init(ObjectClass *oc, void *data)
+static void aspeed_soc_ast2700a1_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("cortex-a35"),
diff --git a/hw/arm/aspeed_soc_common.c b/hw/arm/aspeed_soc_common.c
index 1ddcb26c1e..1c4ac93a0f 100644
--- a/hw/arm/aspeed_soc_common.c
+++ b/hw/arm/aspeed_soc_common.c
@@ -146,7 +146,7 @@ static const Property aspeed_soc_properties[] = {
                      MemoryRegion *),
 };
 
-static void aspeed_soc_class_init(ObjectClass *oc, void *data)
+static void aspeed_soc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     AspeedSoCClass *sc = ASPEED_SOC_CLASS(oc);
diff --git a/hw/arm/b-l475e-iot01a.c b/hw/arm/b-l475e-iot01a.c
index c9a5209216..34ed2e0851 100644
--- a/hw/arm/b-l475e-iot01a.c
+++ b/hw/arm/b-l475e-iot01a.c
@@ -110,7 +110,7 @@ static void bl475e_init(MachineState *machine)
     }
 }
 
-static void bl475e_machine_init(ObjectClass *oc, void *data)
+static void bl475e_machine_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     static const char *machine_valid_cpu_types[] = {
diff --git a/hw/arm/bcm2835_peripherals.c b/hw/arm/bcm2835_peripherals.c
index adc9730c2e..8a1e72dfab 100644
--- a/hw/arm/bcm2835_peripherals.c
+++ b/hw/arm/bcm2835_peripherals.c
@@ -520,7 +520,7 @@ void bcm_soc_peripherals_common_realize(DeviceState *dev, Error **errp)
     create_unimp(s, &s->sdramc, "bcm2835-sdramc", SDRAMC_OFFSET, 0x100);
 }
 
-static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
+static void bcm2835_peripherals_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     BCMSocPeripheralBaseClass *bc = BCM_SOC_PERIPHERALS_BASE_CLASS(oc);
diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index 95e16806fa..cd61ba1505 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -163,7 +163,7 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void bcm283x_base_class_init(ObjectClass *oc, void *data)
+static void bcm283x_base_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -171,7 +171,7 @@ static void bcm283x_base_class_init(ObjectClass *oc, void *data)
     dc->user_creatable = false;
 }
 
-static void bcm2835_class_init(ObjectClass *oc, void *data)
+static void bcm2835_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     BCM283XBaseClass *bc = BCM283X_BASE_CLASS(oc);
@@ -182,7 +182,7 @@ static void bcm2835_class_init(ObjectClass *oc, void *data)
     dc->realize = bcm2835_realize;
 };
 
-static void bcm2836_class_init(ObjectClass *oc, void *data)
+static void bcm2836_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     BCM283XBaseClass *bc = BCM283X_BASE_CLASS(oc);
@@ -196,7 +196,7 @@ static void bcm2836_class_init(ObjectClass *oc, void *data)
 };
 
 #ifdef TARGET_AARCH64
-static void bcm2837_class_init(ObjectClass *oc, void *data)
+static void bcm2837_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     BCM283XBaseClass *bc = BCM283X_BASE_CLASS(oc);
diff --git a/hw/arm/bcm2838.c b/hw/arm/bcm2838.c
index ddb7c5f757..22aa754613 100644
--- a/hw/arm/bcm2838.c
+++ b/hw/arm/bcm2838.c
@@ -233,7 +233,7 @@ static void bcm2838_realize(DeviceState *dev, Error **errp)
     qdev_pass_gpios(DEVICE(&s->gic), DEVICE(&s->peripherals), NULL);
 }
 
-static void bcm2838_class_init(ObjectClass *oc, void *data)
+static void bcm2838_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     BCM283XBaseClass *bc_base = BCM283X_BASE_CLASS(oc);
diff --git a/hw/arm/bcm2838_peripherals.c b/hw/arm/bcm2838_peripherals.c
index e28bef4a37..812b5b8480 100644
--- a/hw/arm/bcm2838_peripherals.c
+++ b/hw/arm/bcm2838_peripherals.c
@@ -196,7 +196,7 @@ static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp)
     create_unimp(s_base, &s->asb, "bcm2838-asb", BRDG_OFFSET, 0x24);
 }
 
-static void bcm2838_peripherals_class_init(ObjectClass *oc, void *data)
+static void bcm2838_peripherals_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     BCM2838PeripheralClass *bc = BCM2838_PERIPHERALS_CLASS(oc);
diff --git a/hw/arm/collie.c b/hw/arm/collie.c
index e83aee58c6..93bb190f1f 100644
--- a/hw/arm/collie.c
+++ b/hw/arm/collie.c
@@ -69,7 +69,7 @@ static void collie_init(MachineState *machine)
     arm_load_kernel(cms->sa1110->cpu, machine, &collie_binfo);
 }
 
-static void collie_machine_class_init(ObjectClass *oc, void *data)
+static void collie_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/arm/digic.c b/hw/arm/digic.c
index 5836619d9f..d831bc974d 100644
--- a/hw/arm/digic.c
+++ b/hw/arm/digic.c
@@ -79,7 +79,7 @@ static void digic_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(sbd, 0, DIGIC_UART_BASE);
 }
 
-static void digic_class_init(ObjectClass *oc, void *data)
+static void digic_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/exynos4210.c b/hw/arm/exynos4210.c
index 0c27588116..76001ff0df 100644
--- a/hw/arm/exynos4210.c
+++ b/hw/arm/exynos4210.c
@@ -842,7 +842,7 @@ static void exynos4210_init(Object *obj)
                             TYPE_EXYNOS4210_COMBINER);
 }
 
-static void exynos4210_class_init(ObjectClass *klass, void *data)
+static void exynos4210_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/exynos4_boards.c b/hw/arm/exynos4_boards.c
index 2d8f2d7326..7304974131 100644
--- a/hw/arm/exynos4_boards.c
+++ b/hw/arm/exynos4_boards.c
@@ -154,7 +154,7 @@ static const char * const valid_cpu_types[] = {
     NULL
 };
 
-static void nuri_class_init(ObjectClass *oc, void *data)
+static void nuri_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -174,7 +174,7 @@ static const TypeInfo nuri_type = {
     .class_init = nuri_class_init,
 };
 
-static void smdkc210_class_init(ObjectClass *oc, void *data)
+static void smdkc210_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/arm/fby35.c b/hw/arm/fby35.c
index 6d3663f14a..e123fa69e1 100644
--- a/hw/arm/fby35.c
+++ b/hw/arm/fby35.c
@@ -162,7 +162,7 @@ static void fby35_instance_init(Object *obj)
     FBY35(obj)->mmio_exec = false;
 }
 
-static void fby35_class_init(ObjectClass *oc, void *data)
+static void fby35_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/arm/fsl-imx25.c b/hw/arm/fsl-imx25.c
index 02214ca1a1..7aad6359ea 100644
--- a/hw/arm/fsl-imx25.c
+++ b/hw/arm/fsl-imx25.c
@@ -311,7 +311,7 @@ static const Property fsl_imx25_properties[] = {
     DEFINE_PROP_UINT32("fec-phy-num", FslIMX25State, phy_num, 0),
 };
 
-static void fsl_imx25_class_init(ObjectClass *oc, void *data)
+static void fsl_imx25_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/fsl-imx31.c b/hw/arm/fsl-imx31.c
index 2a8ffb15f7..e9f70ad94b 100644
--- a/hw/arm/fsl-imx31.c
+++ b/hw/arm/fsl-imx31.c
@@ -218,7 +218,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
                                 &s->iram_alias);
 }
 
-static void fsl_imx31_class_init(ObjectClass *oc, void *data)
+static void fsl_imx31_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/fsl-imx6.c b/hw/arm/fsl-imx6.c
index a114dc0d63..f3a60022d8 100644
--- a/hw/arm/fsl-imx6.c
+++ b/hw/arm/fsl-imx6.c
@@ -484,7 +484,7 @@ static const Property fsl_imx6_properties[] = {
     DEFINE_PROP_UINT32("fec-phy-num", FslIMX6State, phy_num, 0),
 };
 
-static void fsl_imx6_class_init(ObjectClass *oc, void *data)
+static void fsl_imx6_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/fsl-imx6ul.c b/hw/arm/fsl-imx6ul.c
index ce8d3ef535..883c7fc534 100644
--- a/hw/arm/fsl-imx6ul.c
+++ b/hw/arm/fsl-imx6ul.c
@@ -715,7 +715,7 @@ static const Property fsl_imx6ul_properties[] = {
                      true),
 };
 
-static void fsl_imx6ul_class_init(ObjectClass *oc, void *data)
+static void fsl_imx6ul_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/fsl-imx7.c b/hw/arm/fsl-imx7.c
index ed1f10bca2..02f7602077 100644
--- a/hw/arm/fsl-imx7.c
+++ b/hw/arm/fsl-imx7.c
@@ -748,7 +748,7 @@ static const Property fsl_imx7_properties[] = {
                      true),
 };
 
-static void fsl_imx7_class_init(ObjectClass *oc, void *data)
+static void fsl_imx7_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/fsl-imx8mp.c b/hw/arm/fsl-imx8mp.c
index af7a7e6745..23e662c16c 100644
--- a/hw/arm/fsl-imx8mp.c
+++ b/hw/arm/fsl-imx8mp.c
@@ -689,7 +689,7 @@ static const Property fsl_imx8mp_properties[] = {
     DEFINE_PROP_BOOL("fec1-phy-connected", FslImx8mpState, phy_connected, true),
 };
 
-static void fsl_imx8mp_class_init(ObjectClass *oc, void *data)
+static void fsl_imx8mp_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c
index 0f3c207d54..3ae26ebebd 100644
--- a/hw/arm/highbank.c
+++ b/hw/arm/highbank.c
@@ -139,7 +139,7 @@ static void highbank_regs_init(Object *obj)
     sysbus_init_mmio(dev, &s->iomem);
 }
 
-static void highbank_regs_class_init(ObjectClass *klass, void *data)
+static void highbank_regs_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -341,7 +341,7 @@ static void midway_init(MachineState *machine)
     calxeda_init(machine, CALXEDA_MIDWAY);
 }
 
-static void highbank_class_init(ObjectClass *oc, void *data)
+static void highbank_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("cortex-a9"),
@@ -365,7 +365,7 @@ static const TypeInfo highbank_type = {
     .class_init = highbank_class_init,
 };
 
-static void midway_class_init(ObjectClass *oc, void *data)
+static void midway_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("cortex-a15"),
diff --git a/hw/arm/integratorcp.c b/hw/arm/integratorcp.c
index ac0c6c6096..b1d8fbd470 100644
--- a/hw/arm/integratorcp.c
+++ b/hw/arm/integratorcp.c
@@ -699,7 +699,7 @@ static const Property core_properties[] = {
     DEFINE_PROP_UINT32("memsz", IntegratorCMState, memsz, 0),
 };
 
-static void core_class_init(ObjectClass *klass, void *data)
+static void core_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -708,14 +708,14 @@ static void core_class_init(ObjectClass *klass, void *data)
     dc->vmsd = &vmstate_integratorcm;
 }
 
-static void icp_pic_class_init(ObjectClass *klass, void *data)
+static void icp_pic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->vmsd = &vmstate_icp_pic;
 }
 
-static void icp_control_class_init(ObjectClass *klass, void *data)
+static void icp_control_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/microbit.c b/hw/arm/microbit.c
index ade363daaa..525443fdb9 100644
--- a/hw/arm/microbit.c
+++ b/hw/arm/microbit.c
@@ -60,7 +60,7 @@ static void microbit_init(MachineState *machine)
                        0, s->nrf51.flash_size);
 }
 
-static void microbit_machine_class_init(ObjectClass *oc, void *data)
+static void microbit_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/arm/mps2-tz.c b/hw/arm/mps2-tz.c
index b0633a5a69..5dd87cc028 100644
--- a/hw/arm/mps2-tz.c
+++ b/hw/arm/mps2-tz.c
@@ -1267,7 +1267,7 @@ static void mps2_machine_reset(MachineState *machine, ResetType type)
     qemu_devices_reset(type);
 }
 
-static void mps2tz_class_init(ObjectClass *oc, void *data)
+static void mps2tz_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     IDAUInterfaceClass *iic = IDAU_INTERFACE_CLASS(oc);
@@ -1304,7 +1304,7 @@ static void mps2tz_set_default_ram_info(MPS2TZMachineClass *mmc)
     g_assert_not_reached();
 }
 
-static void mps2tz_an505_class_init(ObjectClass *oc, void *data)
+static void mps2tz_an505_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MPS2TZMachineClass *mmc = MPS2TZ_MACHINE_CLASS(oc);
@@ -1338,7 +1338,7 @@ static void mps2tz_an505_class_init(ObjectClass *oc, void *data)
     mps2tz_set_default_ram_info(mmc);
 }
 
-static void mps2tz_an521_class_init(ObjectClass *oc, void *data)
+static void mps2tz_an521_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MPS2TZMachineClass *mmc = MPS2TZ_MACHINE_CLASS(oc);
@@ -1372,7 +1372,7 @@ static void mps2tz_an521_class_init(ObjectClass *oc, void *data)
     mps2tz_set_default_ram_info(mmc);
 }
 
-static void mps3tz_an524_class_init(ObjectClass *oc, void *data)
+static void mps3tz_an524_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MPS2TZMachineClass *mmc = MPS2TZ_MACHINE_CLASS(oc);
@@ -1411,7 +1411,7 @@ static void mps3tz_an524_class_init(ObjectClass *oc, void *data)
                                           "are BRAM (default) and QSPI.");
 }
 
-static void mps3tz_an547_class_init(ObjectClass *oc, void *data)
+static void mps3tz_an547_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MPS2TZMachineClass *mmc = MPS2TZ_MACHINE_CLASS(oc);
@@ -1453,7 +1453,7 @@ static const TypeInfo mps2tz_info = {
     .instance_size = sizeof(MPS2TZMachineState),
     .class_size = sizeof(MPS2TZMachineClass),
     .class_init = mps2tz_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_IDAU_INTERFACE },
         { }
     },
diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
index 6958485a66..58efb41e6d 100644
--- a/hw/arm/mps2.c
+++ b/hw/arm/mps2.c
@@ -464,7 +464,7 @@ static void mps2_common_init(MachineState *machine)
                        0, 0x400000);
 }
 
-static void mps2_class_init(ObjectClass *oc, void *data)
+static void mps2_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -474,7 +474,7 @@ static void mps2_class_init(ObjectClass *oc, void *data)
     mc->default_ram_id = "mps.ram";
 }
 
-static void mps2_an385_class_init(ObjectClass *oc, void *data)
+static void mps2_an385_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MPS2MachineClass *mmc = MPS2_MACHINE_CLASS(oc);
@@ -493,7 +493,7 @@ static void mps2_an385_class_init(ObjectClass *oc, void *data)
     mmc->has_block_ram = true;
 }
 
-static void mps2_an386_class_init(ObjectClass *oc, void *data)
+static void mps2_an386_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MPS2MachineClass *mmc = MPS2_MACHINE_CLASS(oc);
@@ -512,7 +512,7 @@ static void mps2_an386_class_init(ObjectClass *oc, void *data)
     mmc->has_block_ram = true;
 }
 
-static void mps2_an500_class_init(ObjectClass *oc, void *data)
+static void mps2_an500_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MPS2MachineClass *mmc = MPS2_MACHINE_CLASS(oc);
@@ -531,7 +531,7 @@ static void mps2_an500_class_init(ObjectClass *oc, void *data)
     mmc->has_block_ram = false;
 }
 
-static void mps2_an511_class_init(ObjectClass *oc, void *data)
+static void mps2_an511_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MPS2MachineClass *mmc = MPS2_MACHINE_CLASS(oc);
diff --git a/hw/arm/mps3r.c b/hw/arm/mps3r.c
index 4dd1e8a718..48c73acc62 100644
--- a/hw/arm/mps3r.c
+++ b/hw/arm/mps3r.c
@@ -583,14 +583,14 @@ static void mps3r_set_default_ram_info(MPS3RMachineClass *mmc)
     g_assert_not_reached();
 }
 
-static void mps3r_class_init(ObjectClass *oc, void *data)
+static void mps3r_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->init = mps3r_common_init;
 }
 
-static void mps3r_an536_class_init(ObjectClass *oc, void *data)
+static void mps3r_an536_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MPS3RMachineClass *mmc = MPS3R_MACHINE_CLASS(oc);
diff --git a/hw/arm/msf2-soc.c b/hw/arm/msf2-soc.c
index bc9b419e37..c5e9c7175a 100644
--- a/hw/arm/msf2-soc.c
+++ b/hw/arm/msf2-soc.c
@@ -236,7 +236,7 @@ static const Property m2sxxx_soc_properties[] = {
     DEFINE_PROP_UINT8("apb1div", MSF2State, apb1div, 2),
 };
 
-static void m2sxxx_soc_class_init(ObjectClass *klass, void *data)
+static void m2sxxx_soc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/musca.c b/hw/arm/musca.c
index a4f43f1992..250b3b5bf8 100644
--- a/hw/arm/musca.c
+++ b/hw/arm/musca.c
@@ -594,7 +594,7 @@ static void musca_init(MachineState *machine)
                        0, 0x2000000);
 }
 
-static void musca_class_init(ObjectClass *oc, void *data)
+static void musca_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     static const char * const valid_cpu_types[] = {
@@ -609,7 +609,7 @@ static void musca_class_init(ObjectClass *oc, void *data)
     mc->init = musca_init;
 }
 
-static void musca_a_class_init(ObjectClass *oc, void *data)
+static void musca_a_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MuscaMachineClass *mmc = MUSCA_MACHINE_CLASS(oc);
@@ -623,7 +623,7 @@ static void musca_a_class_init(ObjectClass *oc, void *data)
     mmc->num_mpcs = ARRAY_SIZE(a_mpc_info);
 }
 
-static void musca_b1_class_init(ObjectClass *oc, void *data)
+static void musca_b1_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MuscaMachineClass *mmc = MUSCA_MACHINE_CLASS(oc);
diff --git a/hw/arm/musicpal.c b/hw/arm/musicpal.c
index 48a32c2407..329b162eb2 100644
--- a/hw/arm/musicpal.c
+++ b/hw/arm/musicpal.c
@@ -286,7 +286,7 @@ static const VMStateDescription musicpal_lcd_vmsd = {
     }
 };
 
-static void musicpal_lcd_class_init(ObjectClass *klass, void *data)
+static void musicpal_lcd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -407,7 +407,7 @@ static const VMStateDescription mv88w8618_pic_vmsd = {
     }
 };
 
-static void mv88w8618_pic_class_init(ObjectClass *klass, void *data)
+static void mv88w8618_pic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -601,7 +601,7 @@ static const VMStateDescription mv88w8618_pit_vmsd = {
     }
 };
 
-static void mv88w8618_pit_class_init(ObjectClass *klass, void *data)
+static void mv88w8618_pit_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -687,7 +687,7 @@ static const VMStateDescription mv88w8618_flashcfg_vmsd = {
     }
 };
 
-static void mv88w8618_flashcfg_class_init(ObjectClass *klass, void *data)
+static void mv88w8618_flashcfg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1026,7 +1026,7 @@ static const VMStateDescription musicpal_gpio_vmsd = {
     }
 };
 
-static void musicpal_gpio_class_init(ObjectClass *klass, void *data)
+static void musicpal_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1171,7 +1171,7 @@ static const VMStateDescription musicpal_key_vmsd = {
     }
 };
 
-static void musicpal_key_class_init(ObjectClass *klass, void *data)
+static void musicpal_key_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1348,7 +1348,7 @@ static void musicpal_machine_init(MachineClass *mc)
 
 DEFINE_MACHINE("musicpal", musicpal_machine_init)
 
-static void mv88w8618_wlan_class_init(ObjectClass *klass, void *data)
+static void mv88w8618_wlan_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index 2d6e08b72b..2f30c49df5 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -821,7 +821,7 @@ static const Property npcm7xx_properties[] = {
                      MemoryRegion *),
 };
 
-static void npcm7xx_class_init(ObjectClass *oc, void *data)
+static void npcm7xx_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -830,7 +830,7 @@ static void npcm7xx_class_init(ObjectClass *oc, void *data)
     device_class_set_props(dc, npcm7xx_properties);
 }
 
-static void npcm730_class_init(ObjectClass *oc, void *data)
+static void npcm730_class_init(ObjectClass *oc, const void *data)
 {
     NPCM7xxClass *nc = NPCM7XX_CLASS(oc);
 
@@ -839,7 +839,7 @@ static void npcm730_class_init(ObjectClass *oc, void *data)
     nc->num_cpus = 2;
 }
 
-static void npcm750_class_init(ObjectClass *oc, void *data)
+static void npcm750_class_init(ObjectClass *oc, const void *data)
 {
     NPCM7xxClass *nc = NPCM7XX_CLASS(oc);
 
diff --git a/hw/arm/npcm7xx_boards.c b/hw/arm/npcm7xx_boards.c
index eb28b97ad8..465a0e5ace 100644
--- a/hw/arm/npcm7xx_boards.c
+++ b/hw/arm/npcm7xx_boards.c
@@ -453,7 +453,7 @@ static void npcm7xx_set_soc_type(NPCM7xxMachineClass *nmc, const char *type)
     mc->default_cpus = mc->min_cpus = mc->max_cpus = sc->num_cpus;
 }
 
-static void npcm7xx_machine_class_init(ObjectClass *oc, void *data)
+static void npcm7xx_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     static const char * const valid_cpu_types[] = {
@@ -472,7 +472,7 @@ static void npcm7xx_machine_class_init(ObjectClass *oc, void *data)
  * Schematics:
  * https://github.com/Nuvoton-Israel/nuvoton-info/blob/master/npcm7xx-poleg/evaluation-board/board_deliverables/NPCM750x_EB_ver.A1.1_COMPLETE.pdf
  */
-static void npcm750_evb_machine_class_init(ObjectClass *oc, void *data)
+static void npcm750_evb_machine_class_init(ObjectClass *oc, const void *data)
 {
     NPCM7xxMachineClass *nmc = NPCM7XX_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
@@ -485,7 +485,7 @@ static void npcm750_evb_machine_class_init(ObjectClass *oc, void *data)
     mc->default_ram_size = 512 * MiB;
 };
 
-static void gsj_machine_class_init(ObjectClass *oc, void *data)
+static void gsj_machine_class_init(ObjectClass *oc, const void *data)
 {
     NPCM7xxMachineClass *nmc = NPCM7XX_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
@@ -498,7 +498,7 @@ static void gsj_machine_class_init(ObjectClass *oc, void *data)
     mc->default_ram_size = 512 * MiB;
 };
 
-static void gbs_bmc_machine_class_init(ObjectClass *oc, void *data)
+static void gbs_bmc_machine_class_init(ObjectClass *oc, const void *data)
 {
     NPCM7xxMachineClass *nmc = NPCM7XX_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
@@ -511,7 +511,7 @@ static void gbs_bmc_machine_class_init(ObjectClass *oc, void *data)
     mc->default_ram_size = 1 * GiB;
 }
 
-static void kudo_bmc_machine_class_init(ObjectClass *oc, void *data)
+static void kudo_bmc_machine_class_init(ObjectClass *oc, const void *data)
 {
     NPCM7xxMachineClass *nmc = NPCM7XX_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
@@ -524,7 +524,7 @@ static void kudo_bmc_machine_class_init(ObjectClass *oc, void *data)
     mc->default_ram_size = 1 * GiB;
 };
 
-static void mori_bmc_machine_class_init(ObjectClass *oc, void *data)
+static void mori_bmc_machine_class_init(ObjectClass *oc, const void *data)
 {
     NPCM7xxMachineClass *nmc = NPCM7XX_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
diff --git a/hw/arm/npcm8xx.c b/hw/arm/npcm8xx.c
index f182accc47..5cc67b132f 100644
--- a/hw/arm/npcm8xx.c
+++ b/hw/arm/npcm8xx.c
@@ -779,7 +779,7 @@ static const Property npcm8xx_properties[] = {
                      MemoryRegion *),
 };
 
-static void npcm8xx_class_init(ObjectClass *oc, void *data)
+static void npcm8xx_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     NPCM8xxClass *nc = NPCM8XX_CLASS(oc);
diff --git a/hw/arm/npcm8xx_boards.c b/hw/arm/npcm8xx_boards.c
index 3fb8478e72..9d9f6d0c9a 100644
--- a/hw/arm/npcm8xx_boards.c
+++ b/hw/arm/npcm8xx_boards.c
@@ -209,7 +209,7 @@ static void npcm8xx_set_soc_type(NPCM8xxMachineClass *nmc, const char *type)
     mc->default_cpus = mc->min_cpus = mc->max_cpus = sc->num_cpus;
 }
 
-static void npcm8xx_machine_class_init(ObjectClass *oc, void *data)
+static void npcm8xx_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     static const char * const valid_cpu_types[] = {
@@ -224,7 +224,7 @@ static void npcm8xx_machine_class_init(ObjectClass *oc, void *data)
     mc->valid_cpu_types = valid_cpu_types;
 }
 
-static void npcm845_evb_machine_class_init(ObjectClass *oc, void *data)
+static void npcm845_evb_machine_class_init(ObjectClass *oc, const void *data)
 {
     NPCM8xxMachineClass *nmc = NPCM8XX_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
diff --git a/hw/arm/nrf51_soc.c b/hw/arm/nrf51_soc.c
index dee06ab565..d8cc3214ed 100644
--- a/hw/arm/nrf51_soc.c
+++ b/hw/arm/nrf51_soc.c
@@ -216,7 +216,7 @@ static const Property nrf51_soc_properties[] = {
                        NRF51822_FLASH_SIZE),
 };
 
-static void nrf51_soc_class_init(ObjectClass *klass, void *data)
+static void nrf51_soc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/omap_sx1.c b/hw/arm/omap_sx1.c
index aa1e96b3ad..1d89a202bb 100644
--- a/hw/arm/omap_sx1.c
+++ b/hw/arm/omap_sx1.c
@@ -202,7 +202,7 @@ static void sx1_init_v2(MachineState *machine)
     sx1_init(machine, 2);
 }
 
-static void sx1_machine_v2_class_init(ObjectClass *oc, void *data)
+static void sx1_machine_v2_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -221,7 +221,7 @@ static const TypeInfo sx1_machine_v2_type = {
     .class_init = sx1_machine_v2_class_init,
 };
 
-static void sx1_machine_v1_class_init(ObjectClass *oc, void *data)
+static void sx1_machine_v1_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c
index dce35ca11a..9d9af63d65 100644
--- a/hw/arm/raspi.c
+++ b/hw/arm/raspi.c
@@ -337,7 +337,7 @@ static void raspi_machine_class_init(MachineClass *mc,
     mc->init = raspi_machine_init;
 };
 
-static void raspi0_machine_class_init(ObjectClass *oc, void *data)
+static void raspi0_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc);
@@ -347,7 +347,7 @@ static void raspi0_machine_class_init(ObjectClass *oc, void *data)
     raspi_machine_class_init(mc, rmc->board_rev);
 };
 
-static void raspi1ap_machine_class_init(ObjectClass *oc, void *data)
+static void raspi1ap_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc);
@@ -357,7 +357,7 @@ static void raspi1ap_machine_class_init(ObjectClass *oc, void *data)
     raspi_machine_class_init(mc, rmc->board_rev);
 };
 
-static void raspi2b_machine_class_init(ObjectClass *oc, void *data)
+static void raspi2b_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc);
@@ -368,7 +368,7 @@ static void raspi2b_machine_class_init(ObjectClass *oc, void *data)
 };
 
 #ifdef TARGET_AARCH64
-static void raspi3ap_machine_class_init(ObjectClass *oc, void *data)
+static void raspi3ap_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc);
@@ -378,7 +378,7 @@ static void raspi3ap_machine_class_init(ObjectClass *oc, void *data)
     raspi_machine_class_init(mc, rmc->board_rev);
 };
 
-static void raspi3b_machine_class_init(ObjectClass *oc, void *data)
+static void raspi3b_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc);
diff --git a/hw/arm/raspi4b.c b/hw/arm/raspi4b.c
index f6de103a3e..20082d5266 100644
--- a/hw/arm/raspi4b.c
+++ b/hw/arm/raspi4b.c
@@ -107,7 +107,7 @@ static void raspi4b_machine_init(MachineState *machine)
     raspi_base_machine_init(machine, &soc->parent_obj);
 }
 
-static void raspi4b_machine_class_init(ObjectClass *oc, void *data)
+static void raspi4b_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc);
diff --git a/hw/arm/realview.c b/hw/arm/realview.c
index 008eeaf049..5c9050490b 100644
--- a/hw/arm/realview.c
+++ b/hw/arm/realview.c
@@ -413,7 +413,7 @@ static void realview_pbx_a9_init(MachineState *machine)
     realview_init(machine, BOARD_PBX_A9);
 }
 
-static void realview_eb_class_init(ObjectClass *oc, void *data)
+static void realview_eb_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -433,7 +433,7 @@ static const TypeInfo realview_eb_type = {
     .class_init = realview_eb_class_init,
 };
 
-static void realview_eb_mpcore_class_init(ObjectClass *oc, void *data)
+static void realview_eb_mpcore_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -454,7 +454,7 @@ static const TypeInfo realview_eb_mpcore_type = {
     .class_init = realview_eb_mpcore_class_init,
 };
 
-static void realview_pb_a8_class_init(ObjectClass *oc, void *data)
+static void realview_pb_a8_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -473,7 +473,7 @@ static const TypeInfo realview_pb_a8_type = {
     .class_init = realview_pb_a8_class_init,
 };
 
-static void realview_pbx_a9_class_init(ObjectClass *oc, void *data)
+static void realview_pbx_a9_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c
index aa09d7a091..deae5cf986 100644
--- a/hw/arm/sbsa-ref.c
+++ b/hw/arm/sbsa-ref.c
@@ -880,7 +880,7 @@ static void sbsa_ref_instance_init(Object *obj)
     sbsa_flash_create(sms);
 }
 
-static void sbsa_ref_class_init(ObjectClass *oc, void *data)
+static void sbsa_ref_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     static const char * const valid_cpu_types[] = {
diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c
index 1aa2eabfbd..f39b99e526 100644
--- a/hw/arm/smmu-common.c
+++ b/hw/arm/smmu-common.c
@@ -965,7 +965,7 @@ static const Property smmu_dev_properties[] = {
                      TYPE_PCI_BUS, PCIBus *),
 };
 
-static void smmu_base_class_init(ObjectClass *klass, void *data)
+static void smmu_base_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 4362ae6aa1..ab67972353 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -1984,7 +1984,7 @@ static void smmuv3_instance_init(Object *obj)
     /* Nothing much to do here as of now */
 }
 
-static void smmuv3_class_init(ObjectClass *klass, void *data)
+static void smmuv3_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -2031,7 +2031,7 @@ static int smmuv3_notify_flag_changed(IOMMUMemoryRegion *iommu,
 }
 
 static void smmuv3_iommu_memory_region_class_init(ObjectClass *klass,
-                                                  void *data)
+                                                  const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c
index cbe914c93e..031ea3a24e 100644
--- a/hw/arm/stellaris.c
+++ b/hw/arm/stellaris.c
@@ -1413,7 +1413,7 @@ static void lm3s6965evb_init(MachineState *machine)
  * Stellaris LM3S811 Evaluation Board Schematics:
  * https://www.ti.com/lit/ug/symlink/spmu030.pdf
  */
-static void lm3s811evb_class_init(ObjectClass *oc, void *data)
+static void lm3s811evb_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -1433,7 +1433,7 @@ static const TypeInfo lm3s811evb_type = {
  * Stellaris: LM3S6965 Evaluation Board Schematics:
  * https://www.ti.com/lit/ug/symlink/spmu029.pdf
  */
-static void lm3s6965evb_class_init(ObjectClass *oc, void *data)
+static void lm3s6965evb_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -1458,7 +1458,7 @@ static void stellaris_machine_init(void)
 
 type_init(stellaris_machine_init)
 
-static void stellaris_i2c_class_init(ObjectClass *klass, void *data)
+static void stellaris_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -1477,7 +1477,7 @@ static const TypeInfo stellaris_i2c_info = {
     .class_init    = stellaris_i2c_class_init,
 };
 
-static void stellaris_adc_class_init(ObjectClass *klass, void *data)
+static void stellaris_adc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -1494,7 +1494,7 @@ static const TypeInfo stellaris_adc_info = {
     .class_init    = stellaris_adc_class_init,
 };
 
-static void stellaris_sys_class_init(ObjectClass *klass, void *data)
+static void stellaris_sys_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/arm/stm32f100_soc.c b/hw/arm/stm32f100_soc.c
index 0eabaf8d9b..0702d51cc3 100644
--- a/hw/arm/stm32f100_soc.c
+++ b/hw/arm/stm32f100_soc.c
@@ -181,7 +181,7 @@ static void stm32f100_soc_realize(DeviceState *dev_soc, Error **errp)
     create_unimplemented_device("CRC",       0x40023000, 0x400);
 }
 
-static void stm32f100_soc_class_init(ObjectClass *klass, void *data)
+static void stm32f100_soc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/stm32f205_soc.c b/hw/arm/stm32f205_soc.c
index 32e96912f0..229af7fb10 100644
--- a/hw/arm/stm32f205_soc.c
+++ b/hw/arm/stm32f205_soc.c
@@ -202,7 +202,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
     }
 }
 
-static void stm32f205_soc_class_init(ObjectClass *klass, void *data)
+static void stm32f205_soc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/stm32f405_soc.c b/hw/arm/stm32f405_soc.c
index bba9060daf..c8684e2b4c 100644
--- a/hw/arm/stm32f405_soc.c
+++ b/hw/arm/stm32f405_soc.c
@@ -298,7 +298,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     create_unimplemented_device("RNG",         0x50060800, 0x400);
 }
 
-static void stm32f405_soc_class_init(ObjectClass *klass, void *data)
+static void stm32f405_soc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/stm32l4x5_soc.c b/hw/arm/stm32l4x5_soc.c
index 6278d354c8..64da5559c0 100644
--- a/hw/arm/stm32l4x5_soc.c
+++ b/hw/arm/stm32l4x5_soc.c
@@ -435,7 +435,7 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
     create_unimplemented_device("QUADSPI",   0xA0001000, 0x400);
 }
 
-static void stm32l4x5_soc_class_init(ObjectClass *klass, void *data)
+static void stm32l4x5_soc_class_init(ObjectClass *klass, const void *data)
 {
 
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -446,21 +446,21 @@ static void stm32l4x5_soc_class_init(ObjectClass *klass, void *data)
     /* No vmstate or reset required: device has no internal state */
 }
 
-static void stm32l4x5xc_soc_class_init(ObjectClass *oc, void *data)
+static void stm32l4x5xc_soc_class_init(ObjectClass *oc, const void *data)
 {
     Stm32l4x5SocClass *ssc = STM32L4X5_SOC_CLASS(oc);
 
     ssc->flash_size = 256 * KiB;
 }
 
-static void stm32l4x5xe_soc_class_init(ObjectClass *oc, void *data)
+static void stm32l4x5xe_soc_class_init(ObjectClass *oc, const void *data)
 {
     Stm32l4x5SocClass *ssc = STM32L4X5_SOC_CLASS(oc);
 
     ssc->flash_size = 512 * KiB;
 }
 
-static void stm32l4x5xg_soc_class_init(ObjectClass *oc, void *data)
+static void stm32l4x5xg_soc_class_init(ObjectClass *oc, const void *data)
 {
     Stm32l4x5SocClass *ssc = STM32L4X5_SOC_CLASS(oc);
 
diff --git a/hw/arm/strongarm.c b/hw/arm/strongarm.c
index a31f4b4c65..229c98ddd9 100644
--- a/hw/arm/strongarm.c
+++ b/hw/arm/strongarm.c
@@ -215,7 +215,7 @@ static const VMStateDescription vmstate_strongarm_pic_regs = {
     },
 };
 
-static void strongarm_pic_class_init(ObjectClass *klass, void *data)
+static void strongarm_pic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -448,7 +448,8 @@ static const VMStateDescription vmstate_strongarm_rtc_regs = {
     },
 };
 
-static void strongarm_rtc_sysbus_class_init(ObjectClass *klass, void *data)
+static void strongarm_rtc_sysbus_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -693,7 +694,7 @@ static const VMStateDescription vmstate_strongarm_gpio_regs = {
     },
 };
 
-static void strongarm_gpio_class_init(ObjectClass *klass, void *data)
+static void strongarm_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -865,7 +866,7 @@ static const VMStateDescription vmstate_strongarm_ppc_regs = {
     },
 };
 
-static void strongarm_ppc_class_init(ObjectClass *klass, void *data)
+static void strongarm_ppc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1336,7 +1337,7 @@ static const Property strongarm_uart_properties[] = {
     DEFINE_PROP_CHR("chardev", StrongARMUARTState, chr),
 };
 
-static void strongarm_uart_class_init(ObjectClass *klass, void *data)
+static void strongarm_uart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1589,7 +1590,7 @@ static const VMStateDescription vmstate_strongarm_ssp_regs = {
     },
 };
 
-static void strongarm_ssp_class_init(ObjectClass *klass, void *data)
+static void strongarm_ssp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/versatilepb.c b/hw/arm/versatilepb.c
index 35766445fa..5cf1a70d10 100644
--- a/hw/arm/versatilepb.c
+++ b/hw/arm/versatilepb.c
@@ -412,7 +412,7 @@ static void vab_init(MachineState *machine)
     versatile_init(machine, 0x25e);
 }
 
-static void versatilepb_class_init(ObjectClass *oc, void *data)
+static void versatilepb_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -433,7 +433,7 @@ static const TypeInfo versatilepb_type = {
     .class_init = versatilepb_class_init,
 };
 
-static void versatileab_class_init(ObjectClass *oc, void *data)
+static void versatileab_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -462,7 +462,7 @@ static void versatile_machine_init(void)
 
 type_init(versatile_machine_init)
 
-static void vpb_sic_class_init(ObjectClass *klass, void *data)
+static void vpb_sic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c
index 76c6107766..35f8d05ea1 100644
--- a/hw/arm/vexpress.c
+++ b/hw/arm/vexpress.c
@@ -777,7 +777,7 @@ static void vexpress_a9_instance_init(Object *obj)
     vms->virt = false;
 }
 
-static void vexpress_class_init(ObjectClass *oc, void *data)
+static void vexpress_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -795,7 +795,7 @@ static void vexpress_class_init(ObjectClass *oc, void *data)
                                           "Security Extensions (TrustZone)");
 }
 
-static void vexpress_a9_class_init(ObjectClass *oc, void *data)
+static void vexpress_a9_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("cortex-a9"),
@@ -811,7 +811,7 @@ static void vexpress_a9_class_init(ObjectClass *oc, void *data)
     vmc->daughterboard = &a9_daughterboard;
 }
 
-static void vexpress_a15_class_init(ObjectClass *oc, void *data)
+static void vexpress_a15_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("cortex-a15"),
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 3e72adaa91..177f3dd22c 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -107,7 +107,7 @@ static void arm_virt_compat_set(MachineClass *mc)
 #define DEFINE_VIRT_MACHINE_IMPL(latest, ...) \
     static void MACHINE_VER_SYM(class_init, virt, __VA_ARGS__)( \
         ObjectClass *oc, \
-        void *data) \
+        const void *data) \
     { \
         MachineClass *mc = MACHINE_CLASS(oc); \
         arm_virt_compat_set(mc); \
@@ -3124,7 +3124,7 @@ static int virt_hvf_get_physical_address_range(MachineState *ms)
     return requested_ipa_size;
 }
 
-static void virt_machine_class_init(ObjectClass *oc, void *data)
+static void virt_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
@@ -3396,7 +3396,7 @@ static const TypeInfo virt_machine_info = {
     .class_size    = sizeof(VirtMachineClass),
     .class_init    = virt_machine_class_init,
     .instance_init = virt_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
          { TYPE_HOTPLUG_HANDLER },
          { }
     },
diff --git a/hw/arm/xen-pvh.c b/hw/arm/xen-pvh.c
index d1509bd235..4b26bcff7a 100644
--- a/hw/arm/xen-pvh.c
+++ b/hw/arm/xen-pvh.c
@@ -49,7 +49,7 @@ static void xen_pvh_set_pci_intx_irq(void *opaque, int intx_irq, int level)
     }
 }
 
-static void xen_arm_machine_class_init(ObjectClass *oc, void *data)
+static void xen_arm_machine_class_init(ObjectClass *oc, const void *data)
 {
     XenPVHMachineClass *xpc = XEN_PVH_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index b8916665ed..0372cd0ac4 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -453,7 +453,7 @@ static void zynq_init(MachineState *machine)
     arm_load_kernel(zynq_machine->cpu[0], machine, &zynq_binfo);
 }
 
-static void zynq_machine_class_init(ObjectClass *oc, void *data)
+static void zynq_machine_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         ARM_CPU_TYPE_NAME("cortex-a9"),
diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c
index 0c6f0359e3..adadbb7290 100644
--- a/hw/arm/xlnx-versal-virt.c
+++ b/hw/arm/xlnx-versal-virt.c
@@ -808,7 +808,7 @@ static void versal_virt_machine_finalize(Object *obj)
     g_free(s->ospi_model);
 }
 
-static void versal_virt_machine_class_init(ObjectClass *oc, void *data)
+static void versal_virt_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
index f0b383b29e..a42b9e7140 100644
--- a/hw/arm/xlnx-versal.c
+++ b/hw/arm/xlnx-versal.c
@@ -975,7 +975,7 @@ static const Property versal_properties[] = {
                       TYPE_CAN_BUS, CanBusState *),
 };
 
-static void versal_class_init(ObjectClass *klass, void *data)
+static void versal_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/arm/xlnx-zcu102.c b/hw/arm/xlnx-zcu102.c
index 4fdb153e4d..14b6641a71 100644
--- a/hw/arm/xlnx-zcu102.c
+++ b/hw/arm/xlnx-zcu102.c
@@ -267,7 +267,7 @@ static void xlnx_zcu102_machine_instance_init(Object *obj)
                              0);
 }
 
-static void xlnx_zcu102_machine_class_init(ObjectClass *oc, void *data)
+static void xlnx_zcu102_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index ec2b3a41ed..ec96a46eec 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -853,7 +853,7 @@ static const Property xlnx_zynqmp_props[] = {
                      CanBusState *),
 };
 
-static void xlnx_zynqmp_class_init(ObjectClass *oc, void *data)
+static void xlnx_zynqmp_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/audio/ac97.c b/hw/audio/ac97.c
index 05c573776e..669a0463cc 100644
--- a/hw/audio/ac97.c
+++ b/hw/audio/ac97.c
@@ -1328,7 +1328,7 @@ static const Property ac97_properties[] = {
     DEFINE_AUDIO_PROPERTIES(AC97LinkState, card),
 };
 
-static void ac97_class_init(ObjectClass *klass, void *data)
+static void ac97_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1351,7 +1351,7 @@ static const TypeInfo ac97_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(AC97LinkState),
     .class_init    = ac97_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/audio/adlib.c b/hw/audio/adlib.c
index 8c9767b537..1f29a7e319 100644
--- a/hw/audio/adlib.c
+++ b/hw/audio/adlib.c
@@ -303,7 +303,7 @@ static const Property adlib_properties[] = {
     DEFINE_PROP_UINT32 ("freq",    AdlibState, freq,  44100),
 };
 
-static void adlib_class_initfn (ObjectClass *klass, void *data)
+static void adlib_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS (klass);
 
diff --git a/hw/audio/asc.c b/hw/audio/asc.c
index cea7a1c053..18382ccf6a 100644
--- a/hw/audio/asc.c
+++ b/hw/audio/asc.c
@@ -699,7 +699,7 @@ static const Property asc_properties[] = {
     DEFINE_PROP_UINT8("asctype", ASCState, type, ASC_TYPE_ASC),
 };
 
-static void asc_class_init(ObjectClass *oc, void *data)
+static void asc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ResettableClass *rc = RESETTABLE_CLASS(oc);
diff --git a/hw/audio/cs4231.c b/hw/audio/cs4231.c
index 8321f89c88..97cceb44d8 100644
--- a/hw/audio/cs4231.c
+++ b/hw/audio/cs4231.c
@@ -160,7 +160,7 @@ static void cs4231_init(Object *obj)
     sysbus_init_irq(dev, &s->irq);
 }
 
-static void cs4231_class_init(ObjectClass *klass, void *data)
+static void cs4231_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/audio/cs4231a.c b/hw/audio/cs4231a.c
index 5a9be80ba3..06b44da869 100644
--- a/hw/audio/cs4231a.c
+++ b/hw/audio/cs4231a.c
@@ -696,7 +696,7 @@ static const Property cs4231a_properties[] = {
     DEFINE_PROP_UINT32 ("dma",     CSState, dma,  3),
 };
 
-static void cs4231a_class_initfn (ObjectClass *klass, void *data)
+static void cs4231a_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS (klass);
 
diff --git a/hw/audio/es1370.c b/hw/audio/es1370.c
index 75f71e5d78..8efb969212 100644
--- a/hw/audio/es1370.c
+++ b/hw/audio/es1370.c
@@ -872,7 +872,7 @@ static const Property es1370_properties[] = {
     DEFINE_AUDIO_PROPERTIES(ES1370State, card),
 };
 
-static void es1370_class_init (ObjectClass *klass, void *data)
+static void es1370_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS (klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS (klass);
@@ -896,7 +896,7 @@ static const TypeInfo es1370_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof (ES1370State),
     .class_init    = es1370_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/audio/gus.c b/hw/audio/gus.c
index e718c1183e..87e8634893 100644
--- a/hw/audio/gus.c
+++ b/hw/audio/gus.c
@@ -298,7 +298,7 @@ static const Property gus_properties[] = {
     DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
 };
 
-static void gus_class_initfn (ObjectClass *klass, void *data)
+static void gus_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS (klass);
 
diff --git a/hw/audio/hda-codec.c b/hw/audio/hda-codec.c
index 6f3a8f691b..66edad280f 100644
--- a/hw/audio/hda-codec.c
+++ b/hw/audio/hda-codec.c
@@ -900,7 +900,7 @@ static void hda_audio_init_micro(HDACodecDevice *hda, Error **errp)
     hda_audio_init(hda, desc, errp);
 }
 
-static void hda_audio_base_class_init(ObjectClass *klass, void *data)
+static void hda_audio_base_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     HDACodecDeviceClass *k = HDA_CODEC_DEVICE_CLASS(klass);
@@ -922,7 +922,7 @@ static const TypeInfo hda_audio_info = {
     .abstract      = true,
 };
 
-static void hda_audio_output_class_init(ObjectClass *klass, void *data)
+static void hda_audio_output_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     HDACodecDeviceClass *k = HDA_CODEC_DEVICE_CLASS(klass);
@@ -937,7 +937,7 @@ static const TypeInfo hda_audio_output_info = {
     .class_init    = hda_audio_output_class_init,
 };
 
-static void hda_audio_duplex_class_init(ObjectClass *klass, void *data)
+static void hda_audio_duplex_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     HDACodecDeviceClass *k = HDA_CODEC_DEVICE_CLASS(klass);
@@ -952,7 +952,7 @@ static const TypeInfo hda_audio_duplex_info = {
     .class_init    = hda_audio_duplex_class_init,
 };
 
-static void hda_audio_micro_class_init(ObjectClass *klass, void *data)
+static void hda_audio_micro_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     HDACodecDeviceClass *k = HDA_CODEC_DEVICE_CLASS(klass);
diff --git a/hw/audio/intel-hda.c b/hw/audio/intel-hda.c
index 3214992ddc..b256c8ccea 100644
--- a/hw/audio/intel-hda.c
+++ b/hw/audio/intel-hda.c
@@ -1220,7 +1220,7 @@ static const Property intel_hda_properties[] = {
     DEFINE_PROP_BOOL("old_msi_addr", IntelHDAState, old_msi_addr, false),
 };
 
-static void intel_hda_class_init(ObjectClass *klass, void *data)
+static void intel_hda_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1234,7 +1234,7 @@ static void intel_hda_class_init(ObjectClass *klass, void *data)
     device_class_set_props(dc, intel_hda_properties);
 }
 
-static void intel_hda_class_init_ich6(ObjectClass *klass, void *data)
+static void intel_hda_class_init_ich6(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1245,7 +1245,7 @@ static void intel_hda_class_init_ich6(ObjectClass *klass, void *data)
     dc->desc = "Intel HD Audio Controller (ich6)";
 }
 
-static void intel_hda_class_init_ich9(ObjectClass *klass, void *data)
+static void intel_hda_class_init_ich9(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1262,7 +1262,7 @@ static const TypeInfo intel_hda_info = {
     .instance_size = sizeof(IntelHDAState),
     .class_init    = intel_hda_class_init,
     .abstract      = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -1280,7 +1280,7 @@ static const TypeInfo intel_hda_info_ich9 = {
     .class_init    = intel_hda_class_init_ich9,
 };
 
-static void hda_codec_device_class_init(ObjectClass *klass, void *data)
+static void hda_codec_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->realize = hda_codec_dev_realize;
diff --git a/hw/audio/marvell_88w8618.c b/hw/audio/marvell_88w8618.c
index 28f9af320d..6d3ebbb0c8 100644
--- a/hw/audio/marvell_88w8618.c
+++ b/hw/audio/marvell_88w8618.c
@@ -287,7 +287,7 @@ static const VMStateDescription mv88w8618_audio_vmsd = {
     }
 };
 
-static void mv88w8618_audio_class_init(ObjectClass *klass, void *data)
+static void mv88w8618_audio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/audio/pcspk.c b/hw/audio/pcspk.c
index 17be185547..a419161b5b 100644
--- a/hw/audio/pcspk.c
+++ b/hw/audio/pcspk.c
@@ -221,7 +221,7 @@ static const Property pcspk_properties[] = {
     DEFINE_PROP_BOOL("migrate", PCSpkState, migrate,  true),
 };
 
-static void pcspk_class_initfn(ObjectClass *klass, void *data)
+static void pcspk_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/audio/pl041.c b/hw/audio/pl041.c
index f771d725fa..5d9d6c1178 100644
--- a/hw/audio/pl041.c
+++ b/hw/audio/pl041.c
@@ -632,7 +632,7 @@ static const Property pl041_device_properties[] = {
                        DEFAULT_FIFO_DEPTH),
 };
 
-static void pl041_device_class_init(ObjectClass *klass, void *data)
+static void pl041_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/audio/sb16.c b/hw/audio/sb16.c
index 0c661b4947..19fd3b9020 100644
--- a/hw/audio/sb16.c
+++ b/hw/audio/sb16.c
@@ -1449,7 +1449,7 @@ static const Property sb16_properties[] = {
     DEFINE_PROP_UINT32 ("dma16",   SB16State, hdma, 5),
 };
 
-static void sb16_class_initfn (ObjectClass *klass, void *data)
+static void sb16_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS (klass);
 
diff --git a/hw/audio/via-ac97.c b/hw/audio/via-ac97.c
index 4e115e011e..1e0a5c7398 100644
--- a/hw/audio/via-ac97.c
+++ b/hw/audio/via-ac97.c
@@ -463,7 +463,7 @@ static const Property via_ac97_properties[] = {
     DEFINE_AUDIO_PROPERTIES(ViaAC97State, card),
 };
 
-static void via_ac97_class_init(ObjectClass *klass, void *data)
+static void via_ac97_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -487,7 +487,7 @@ static const TypeInfo via_ac97_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(ViaAC97State),
     .class_init    = via_ac97_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -501,7 +501,7 @@ static void via_mc97_realize(PCIDevice *pci_dev, Error **errp)
     pci_set_long(pci_dev->config + PCI_INTERRUPT_PIN, 0x03);
 }
 
-static void via_mc97_class_init(ObjectClass *klass, void *data)
+static void via_mc97_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -522,7 +522,7 @@ static const TypeInfo via_mc97_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init    = via_mc97_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/audio/virtio-snd-pci.c b/hw/audio/virtio-snd-pci.c
index 74d93f4e9c..9eb0007392 100644
--- a/hw/audio/virtio-snd-pci.c
+++ b/hw/audio/virtio-snd-pci.c
@@ -42,7 +42,7 @@ static void virtio_snd_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void virtio_snd_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_snd_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/audio/virtio-snd.c b/hw/audio/virtio-snd.c
index 0b47741f01..eca3319e59 100644
--- a/hw/audio/virtio-snd.c
+++ b/hw/audio/virtio-snd.c
@@ -1361,7 +1361,7 @@ static void virtio_snd_reset(VirtIODevice *vdev)
     }
 }
 
-static void virtio_snd_class_init(ObjectClass *klass, void *data)
+static void virtio_snd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/audio/wm8750.c b/hw/audio/wm8750.c
index 8d381dbc65..2846b55fe2 100644
--- a/hw/audio/wm8750.c
+++ b/hw/audio/wm8750.c
@@ -710,7 +710,7 @@ static const Property wm8750_properties[] = {
     DEFINE_AUDIO_PROPERTIES(WM8750State, card),
 };
 
-static void wm8750_class_init(ObjectClass *klass, void *data)
+static void wm8750_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
diff --git a/hw/avr/arduino.c b/hw/avr/arduino.c
index 48ef478346..e166ca18e1 100644
--- a/hw/avr/arduino.c
+++ b/hw/avr/arduino.c
@@ -56,7 +56,7 @@ static void arduino_machine_init(MachineState *machine)
     }
 }
 
-static void arduino_machine_class_init(ObjectClass *oc, void *data)
+static void arduino_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -69,7 +69,7 @@ static void arduino_machine_class_init(ObjectClass *oc, void *data)
     mc->no_parallel = 1;
 }
 
-static void arduino_duemilanove_class_init(ObjectClass *oc, void *data)
+static void arduino_duemilanove_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     ArduinoMachineClass *amc = ARDUINO_MACHINE_CLASS(oc);
@@ -84,7 +84,7 @@ static void arduino_duemilanove_class_init(ObjectClass *oc, void *data)
     amc->xtal_hz    = 16 * 1000 * 1000;
 };
 
-static void arduino_uno_class_init(ObjectClass *oc, void *data)
+static void arduino_uno_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     ArduinoMachineClass *amc = ARDUINO_MACHINE_CLASS(oc);
@@ -99,7 +99,7 @@ static void arduino_uno_class_init(ObjectClass *oc, void *data)
     amc->xtal_hz    = 16 * 1000 * 1000;
 };
 
-static void arduino_mega_class_init(ObjectClass *oc, void *data)
+static void arduino_mega_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     ArduinoMachineClass *amc = ARDUINO_MACHINE_CLASS(oc);
@@ -114,7 +114,7 @@ static void arduino_mega_class_init(ObjectClass *oc, void *data)
     amc->xtal_hz    = 16 * 1000 * 1000;
 };
 
-static void arduino_mega2560_class_init(ObjectClass *oc, void *data)
+static void arduino_mega2560_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     ArduinoMachineClass *amc = ARDUINO_MACHINE_CLASS(oc);
diff --git a/hw/avr/atmega.c b/hw/avr/atmega.c
index c105d2a97c..95b6da5e34 100644
--- a/hw/avr/atmega.c
+++ b/hw/avr/atmega.c
@@ -386,7 +386,7 @@ static const Property atmega_props[] = {
                        xtal_freq_hz, 0),
 };
 
-static void atmega_class_init(ObjectClass *oc, void *data)
+static void atmega_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -396,7 +396,7 @@ static void atmega_class_init(ObjectClass *oc, void *data)
     dc->user_creatable = false;
 }
 
-static void atmega168_class_init(ObjectClass *oc, void *data)
+static void atmega168_class_init(ObjectClass *oc, const void *data)
 {
     AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
 
@@ -411,7 +411,7 @@ static void atmega168_class_init(ObjectClass *oc, void *data)
     amc->dev = dev168_328;
 };
 
-static void atmega328_class_init(ObjectClass *oc, void *data)
+static void atmega328_class_init(ObjectClass *oc, const void *data)
 {
     AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
 
@@ -426,7 +426,7 @@ static void atmega328_class_init(ObjectClass *oc, void *data)
     amc->dev = dev168_328;
 };
 
-static void atmega1280_class_init(ObjectClass *oc, void *data)
+static void atmega1280_class_init(ObjectClass *oc, const void *data)
 {
     AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
 
@@ -441,7 +441,7 @@ static void atmega1280_class_init(ObjectClass *oc, void *data)
     amc->dev = dev1280_2560;
 };
 
-static void atmega2560_class_init(ObjectClass *oc, void *data)
+static void atmega2560_class_init(ObjectClass *oc, const void *data)
 {
     AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
 
diff --git a/hw/block/fdc-isa.c b/hw/block/fdc-isa.c
index 561cfa47c1..6d1790e0e6 100644
--- a/hw/block/fdc-isa.c
+++ b/hw/block/fdc-isa.c
@@ -298,7 +298,7 @@ static const Property isa_fdc_properties[] = {
                         FloppyDriveType),
 };
 
-static void isabus_fdc_class_init(ObjectClass *klass, void *data)
+static void isabus_fdc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
@@ -331,7 +331,7 @@ static const TypeInfo isa_fdc_info = {
     .instance_size = sizeof(FDCtrlISABus),
     .class_init    = isabus_fdc_class_init,
     .instance_init = isabus_fdc_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
diff --git a/hw/block/fdc-sysbus.c b/hw/block/fdc-sysbus.c
index 4955e478cd..956860ab29 100644
--- a/hw/block/fdc-sysbus.c
+++ b/hw/block/fdc-sysbus.c
@@ -176,7 +176,7 @@ static const VMStateDescription vmstate_sysbus_fdc = {
     }
 };
 
-static void sysbus_fdc_common_class_init(ObjectClass *klass, void *data)
+static void sysbus_fdc_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -208,7 +208,7 @@ static const Property sysbus_fdc_properties[] = {
                         FloppyDriveType),
 };
 
-static void sysbus_fdc_class_init(ObjectClass *klass, void *data)
+static void sysbus_fdc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -231,7 +231,7 @@ static const Property sun4m_fdc_properties[] = {
                         FloppyDriveType),
 };
 
-static void sun4m_fdc_class_init(ObjectClass *klass, void *data)
+static void sun4m_fdc_class_init(ObjectClass *klass, const void *data)
 {
     FDCtrlSysBusClass *sbdc = SYSBUS_FDC_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 2df941d3f4..d0f08c7be5 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -553,7 +553,7 @@ static void floppy_drive_realize(DeviceState *qdev, Error **errp)
     fd_revalidate(drive);
 }
 
-static void floppy_drive_class_init(ObjectClass *klass, void *data)
+static void floppy_drive_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->realize = floppy_drive_realize;
diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index 0887c103e4..a5336d92ff 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -528,7 +528,7 @@ struct Flash {
 
 struct M25P80Class {
     SSIPeripheralClass parent_class;
-    FlashPartInfo *pi;
+    const FlashPartInfo *pi;
 };
 
 OBJECT_DECLARE_TYPE(Flash, M25P80Class, M25P80)
@@ -1857,7 +1857,7 @@ static const VMStateDescription vmstate_m25p80 = {
     }
 };
 
-static void m25p80_class_init(ObjectClass *klass, void *data)
+static void m25p80_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
@@ -1893,7 +1893,7 @@ static void m25p80_register_types(void)
             .name       = known_devices[i].part_name,
             .parent     = TYPE_M25P80,
             .class_init = m25p80_class_init,
-            .class_data = (void *)&known_devices[i],
+            .class_data = &known_devices[i],
         };
         type_register_static(&ti);
     }
diff --git a/hw/block/nand.c b/hw/block/nand.c
index e98c55b729..c80bf78fe5 100644
--- a/hw/block/nand.c
+++ b/hw/block/nand.c
@@ -451,7 +451,7 @@ static const Property nand_properties[] = {
     DEFINE_PROP_DRIVE("drive", NANDFlashState, blk),
 };
 
-static void nand_class_init(ObjectClass *klass, void *data)
+static void nand_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c
index b5ea927f36..168101d8df 100644
--- a/hw/block/pflash_cfi01.c
+++ b/hw/block/pflash_cfi01.c
@@ -934,7 +934,7 @@ static const Property pflash_cfi01_properties[] = {
                      old_multiple_chip_handling, false),
 };
 
-static void pflash_cfi01_class_init(ObjectClass *klass, void *data)
+static void pflash_cfi01_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c
index 315a53629a..3244b699b9 100644
--- a/hw/block/pflash_cfi02.c
+++ b/hw/block/pflash_cfi02.c
@@ -968,7 +968,7 @@ static void pflash_cfi02_unrealize(DeviceState *dev)
     g_free(pfl->sector_erase_map);
 }
 
-static void pflash_cfi02_class_init(ObjectClass *klass, void *data)
+static void pflash_cfi02_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/block/swim.c b/hw/block/swim.c
index 4645468dcf..ad047362f8 100644
--- a/hw/block/swim.c
+++ b/hw/block/swim.c
@@ -253,7 +253,7 @@ static void swim_drive_realize(DeviceState *qdev, Error **errp)
     blk_set_dev_ops(drive->blk, &swim_block_ops, drive);
 }
 
-static void swim_drive_class_init(ObjectClass *klass, void *data)
+static void swim_drive_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->realize = swim_drive_realize;
@@ -550,7 +550,7 @@ static const VMStateDescription vmstate_sysbus_swim = {
     }
 };
 
-static void sysbus_swim_class_init(ObjectClass *oc, void *data)
+static void sysbus_swim_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c
index ae42327cf8..4bb5ed299e 100644
--- a/hw/block/vhost-user-blk.c
+++ b/hw/block/vhost-user-blk.c
@@ -583,7 +583,7 @@ static const Property vhost_user_blk_properties[] = {
                       VIRTIO_BLK_F_WRITE_ZEROES, true),
 };
 
-static void vhost_user_blk_class_init(ObjectClass *klass, void *data)
+static void vhost_user_blk_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 5077793e5e..b54d01d3a2 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -1886,7 +1886,7 @@ static const Property virtio_blk_properties[] = {
                      conf.x_enable_wce_if_config_wce, true),
 };
 
-static void virtio_blk_class_init(ObjectClass *klass, void *data)
+static void virtio_blk_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/block/xen-block.c b/hw/block/xen-block.c
index ec04102b66..74de897c79 100644
--- a/hw/block/xen-block.c
+++ b/hw/block/xen-block.c
@@ -679,7 +679,7 @@ static const Property xen_block_props[] = {
                      TYPE_IOTHREAD, IOThread *),
 };
 
-static void xen_block_class_init(ObjectClass *class, void *data)
+static void xen_block_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dev_class = DEVICE_CLASS(class);
     XenDeviceClass *xendev_class = XEN_DEVICE_CLASS(class);
@@ -724,7 +724,7 @@ static void xen_disk_realize(XenBlockDevice *blockdev, Error **errp)
     blockdev->info = blk_supports_write_perm(conf->blk) ? 0 : VDISK_READONLY;
 }
 
-static void xen_disk_class_init(ObjectClass *class, void *data)
+static void xen_disk_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dev_class = DEVICE_CLASS(class);
     XenBlockDeviceClass *blockdev_class = XEN_BLOCK_DEVICE_CLASS(class);
@@ -771,7 +771,7 @@ static void xen_cdrom_realize(XenBlockDevice *blockdev, Error **errp)
     blockdev->info = VDISK_READONLY | VDISK_CDROM;
 }
 
-static void xen_cdrom_class_init(ObjectClass *class, void *data)
+static void xen_cdrom_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dev_class = DEVICE_CLASS(class);
     XenBlockDeviceClass *blockdev_class = XEN_BLOCK_DEVICE_CLASS(class);
diff --git a/hw/char/avr_usart.c b/hw/char/avr_usart.c
index e8012cae3a..fae15217e9 100644
--- a/hw/char/avr_usart.c
+++ b/hw/char/avr_usart.c
@@ -295,7 +295,7 @@ static void avr_usart_realize(DeviceState *dev, Error **errp)
     avr_usart_reset(dev);
 }
 
-static void avr_usart_class_init(ObjectClass *klass, void *data)
+static void avr_usart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/bcm2835_aux.c b/hw/char/bcm2835_aux.c
index 9b073fc330..2b397f2ff3 100644
--- a/hw/char/bcm2835_aux.c
+++ b/hw/char/bcm2835_aux.c
@@ -296,7 +296,7 @@ static const Property bcm2835_aux_props[] = {
     DEFINE_PROP_CHR("chardev", BCM2835AuxState, chr),
 };
 
-static void bcm2835_aux_class_init(ObjectClass *oc, void *data)
+static void bcm2835_aux_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c
index ebd846a083..0dfa356b6d 100644
--- a/hw/char/cadence_uart.c
+++ b/hw/char/cadence_uart.c
@@ -621,7 +621,7 @@ static const Property cadence_uart_properties[] = {
     DEFINE_PROP_CHR("chardev", CadenceUARTState, chr),
 };
 
-static void cadence_uart_class_init(ObjectClass *klass, void *data)
+static void cadence_uart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/char/cmsdk-apb-uart.c b/hw/char/cmsdk-apb-uart.c
index 0506500215..32090f3516 100644
--- a/hw/char/cmsdk-apb-uart.c
+++ b/hw/char/cmsdk-apb-uart.c
@@ -382,7 +382,7 @@ static const Property cmsdk_apb_uart_properties[] = {
     DEFINE_PROP_UINT32("pclk-frq", CMSDKAPBUART, pclk_frq, 0),
 };
 
-static void cmsdk_apb_uart_class_init(ObjectClass *klass, void *data)
+static void cmsdk_apb_uart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/debugcon.c b/hw/char/debugcon.c
index 1bc3bf85fe..bf44aaf9e4 100644
--- a/hw/char/debugcon.c
+++ b/hw/char/debugcon.c
@@ -120,7 +120,7 @@ static const Property debugcon_isa_properties[] = {
     DEFINE_PROP_UINT32("readback", ISADebugconState, state.readback, 0xe9),
 };
 
-static void debugcon_isa_class_initfn(ObjectClass *klass, void *data)
+static void debugcon_isa_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/digic-uart.c b/hw/char/digic-uart.c
index b0b0714e0f..0f6af51bb7 100644
--- a/hw/char/digic-uart.c
+++ b/hw/char/digic-uart.c
@@ -176,7 +176,7 @@ static const Property digic_uart_properties[] = {
     DEFINE_PROP_CHR("chardev", DigicUartState, chr),
 };
 
-static void digic_uart_class_init(ObjectClass *klass, void *data)
+static void digic_uart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/diva-gsp.c b/hw/char/diva-gsp.c
index ecec1f7bb1..60f933191d 100644
--- a/hw/char/diva-gsp.c
+++ b/hw/char/diva-gsp.c
@@ -183,7 +183,7 @@ static const Property diva_serial_properties[] = {
                                     PCI_DEVICE_ID_HP_DIVA_TOSCA1),
 };
 
-static void diva_serial_class_initfn(ObjectClass *klass, void *data)
+static void diva_serial_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
@@ -242,7 +242,7 @@ static void diva_aux_exit(PCIDevice *dev)
     qemu_free_irq(pci->irq);
 }
 
-static void diva_aux_class_initfn(ObjectClass *klass, void *data)
+static void diva_aux_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
@@ -268,7 +268,7 @@ static const TypeInfo diva_aux_info = {
     .instance_size = sizeof(DivaAuxState),
     .instance_init = diva_aux_init,
     .class_init    = diva_aux_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -282,7 +282,7 @@ static const TypeInfo diva_serial_pci_info = {
     .instance_size = sizeof(PCIDivaSerialState),
     .instance_init = diva_serial_init,
     .class_init    = diva_serial_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/char/escc.c b/hw/char/escc.c
index a5fdd8f698..afe4ca483e 100644
--- a/hw/char/escc.c
+++ b/hw/char/escc.c
@@ -1101,7 +1101,7 @@ static const Property escc_properties[] = {
     DEFINE_PROP_STRING("chnA-sunkbd-layout", ESCCState, chn[1].sunkbd_layout),
 };
 
-static void escc_class_init(ObjectClass *klass, void *data)
+static void escc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/exynos4210_uart.c b/hw/char/exynos4210_uart.c
index a1a9a12caf..6521b4cedd 100644
--- a/hw/char/exynos4210_uart.c
+++ b/hw/char/exynos4210_uart.c
@@ -711,7 +711,7 @@ static const Property exynos4210_uart_properties[] = {
     DEFINE_PROP_UINT32("tx-size", Exynos4210UartState, tx.size, 16),
 };
 
-static void exynos4210_uart_class_init(ObjectClass *klass, void *data)
+static void exynos4210_uart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/goldfish_tty.c b/hw/char/goldfish_tty.c
index f0891ffa4d..a37408adae 100644
--- a/hw/char/goldfish_tty.c
+++ b/hw/char/goldfish_tty.c
@@ -256,7 +256,7 @@ static void goldfish_tty_instance_init(Object *obj)
     sysbus_init_irq(dev, &s->irq);
 }
 
-static void goldfish_tty_class_init(ObjectClass *oc, void *data)
+static void goldfish_tty_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/char/grlib_apbuart.c b/hw/char/grlib_apbuart.c
index db6bcdad41..81c26e3389 100644
--- a/hw/char/grlib_apbuart.c
+++ b/hw/char/grlib_apbuart.c
@@ -281,7 +281,7 @@ static const Property grlib_apbuart_properties[] = {
     DEFINE_PROP_CHR("chrdev", UART, chr),
 };
 
-static void grlib_apbuart_class_init(ObjectClass *klass, void *data)
+static void grlib_apbuart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/ibex_uart.c b/hw/char/ibex_uart.c
index 392375ad55..d6f0d18c77 100644
--- a/hw/char/ibex_uart.c
+++ b/hw/char/ibex_uart.c
@@ -542,7 +542,7 @@ static void ibex_uart_realize(DeviceState *dev, Error **errp)
                              s, NULL, true);
 }
 
-static void ibex_uart_class_init(ObjectClass *klass, void *data)
+static void ibex_uart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/imx_serial.c b/hw/char/imx_serial.c
index 6f14f8403a..509b0141d0 100644
--- a/hw/char/imx_serial.c
+++ b/hw/char/imx_serial.c
@@ -467,7 +467,7 @@ static const Property imx_serial_properties[] = {
     DEFINE_PROP_CHR("chardev", IMXSerialState, chr),
 };
 
-static void imx_serial_class_init(ObjectClass *klass, void *data)
+static void imx_serial_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/ipoctal232.c b/hw/char/ipoctal232.c
index a2879977fb..752c6c818a 100644
--- a/hw/char/ipoctal232.c
+++ b/hw/char/ipoctal232.c
@@ -569,7 +569,7 @@ static const Property ipoctal_properties[] = {
     DEFINE_PROP_CHR("chardev7", IPOctalState, ch[7].dev),
 };
 
-static void ipoctal_class_init(ObjectClass *klass, void *data)
+static void ipoctal_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IPackDeviceClass *ic = IPACK_DEVICE_CLASS(klass);
diff --git a/hw/char/mcf_uart.c b/hw/char/mcf_uart.c
index 529c26be93..87bfcbebdc 100644
--- a/hw/char/mcf_uart.c
+++ b/hw/char/mcf_uart.c
@@ -322,7 +322,7 @@ static const Property mcf_uart_properties[] = {
     DEFINE_PROP_CHR("chardev", mcf_uart_state, chr),
 };
 
-static void mcf_uart_class_init(ObjectClass *oc, void *data)
+static void mcf_uart_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/char/mchp_pfsoc_mmuart.c b/hw/char/mchp_pfsoc_mmuart.c
index 3c3224c05d..6149f9d204 100644
--- a/hw/char/mchp_pfsoc_mmuart.c
+++ b/hw/char/mchp_pfsoc_mmuart.c
@@ -121,7 +121,7 @@ static const VMStateDescription mchp_pfsoc_mmuart_vmstate = {
     }
 };
 
-static void mchp_pfsoc_mmuart_class_init(ObjectClass *oc, void *data)
+static void mchp_pfsoc_mmuart_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/char/nrf51_uart.c b/hw/char/nrf51_uart.c
index 82a61ee95f..41d423446f 100644
--- a/hw/char/nrf51_uart.c
+++ b/hw/char/nrf51_uart.c
@@ -308,7 +308,7 @@ static const Property nrf51_uart_properties[] = {
     DEFINE_PROP_CHR("chardev", NRF51UARTState, chr),
 };
 
-static void nrf51_uart_class_init(ObjectClass *klass, void *data)
+static void nrf51_uart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/parallel.c b/hw/char/parallel.c
index e1651d52a4..8732e4e9f9 100644
--- a/hw/char/parallel.c
+++ b/hw/char/parallel.c
@@ -610,7 +610,7 @@ static const Property parallel_isa_properties[] = {
     DEFINE_PROP_CHR("chardev",  ISAParallelState, state.chr),
 };
 
-static void parallel_isa_class_initfn(ObjectClass *klass, void *data)
+static void parallel_isa_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
@@ -627,7 +627,7 @@ static const TypeInfo parallel_isa_info = {
     .parent        = TYPE_ISA_DEVICE,
     .instance_size = sizeof(ISAParallelState),
     .class_init    = parallel_isa_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
diff --git a/hw/char/pl011.c b/hw/char/pl011.c
index 0e9ec1301d..01335d9437 100644
--- a/hw/char/pl011.c
+++ b/hw/char/pl011.c
@@ -669,7 +669,7 @@ static void pl011_reset(DeviceState *dev)
     pl011_reset_tx_fifo(s);
 }
 
-static void pl011_class_init(ObjectClass *oc, void *data)
+static void pl011_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/char/renesas_sci.c b/hw/char/renesas_sci.c
index ea94494932..b9d0ed1c89 100644
--- a/hw/char/renesas_sci.c
+++ b/hw/char/renesas_sci.c
@@ -324,7 +324,7 @@ static const Property rsci_properties[] = {
     DEFINE_PROP_CHR("chardev", RSCIState, chr),
 };
 
-static void rsci_class_init(ObjectClass *klass, void *data)
+static void rsci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/sclpconsole-lm.c b/hw/char/sclpconsole-lm.c
index ddb9a726d5..e9580aacba 100644
--- a/hw/char/sclpconsole-lm.c
+++ b/hw/char/sclpconsole-lm.c
@@ -339,7 +339,7 @@ static const Property console_properties[] = {
     DEFINE_PROP_BOOL("echo", SCLPConsoleLM, echo, true),
 };
 
-static void console_class_init(ObjectClass *klass, void *data)
+static void console_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SCLPEventClass *ec = SCLP_EVENT_CLASS(klass);
diff --git a/hw/char/sclpconsole.c b/hw/char/sclpconsole.c
index 01233b933d..95e3045178 100644
--- a/hw/char/sclpconsole.c
+++ b/hw/char/sclpconsole.c
@@ -255,7 +255,7 @@ static const Property console_properties[] = {
     DEFINE_PROP_CHR("chardev", SCLPConsole, chr),
 };
 
-static void console_class_init(ObjectClass *klass, void *data)
+static void console_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SCLPEventClass *ec = SCLP_EVENT_CLASS(klass);
diff --git a/hw/char/serial-isa.c b/hw/char/serial-isa.c
index 3d913891dc..0ea59a3d5c 100644
--- a/hw/char/serial-isa.c
+++ b/hw/char/serial-isa.c
@@ -119,7 +119,7 @@ static const Property serial_isa_properties[] = {
     DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
 };
 
-static void serial_isa_class_initfn(ObjectClass *klass, void *data)
+static void serial_isa_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
@@ -146,7 +146,7 @@ static const TypeInfo serial_isa_info = {
     .instance_size = sizeof(ISASerialState),
     .instance_init = serial_isa_initfn,
     .class_init    = serial_isa_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
diff --git a/hw/char/serial-mm.c b/hw/char/serial-mm.c
index 6338e7c0ba..13aba780ec 100644
--- a/hw/char/serial-mm.c
+++ b/hw/char/serial-mm.c
@@ -134,7 +134,7 @@ static const Property serial_mm_properties[] = {
     DEFINE_PROP_UINT8("endianness", SerialMM, endianness, DEVICE_NATIVE_ENDIAN),
 };
 
-static void serial_mm_class_init(ObjectClass *oc, void *data)
+static void serial_mm_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/char/serial-pci-multi.c b/hw/char/serial-pci-multi.c
index 718ae25131..fb184c2e6d 100644
--- a/hw/char/serial-pci-multi.c
+++ b/hw/char/serial-pci-multi.c
@@ -144,7 +144,8 @@ static const Property multi_4x_serial_pci_properties[] = {
     DEFINE_PROP_UINT8("prog_if",  PCIMultiSerialState, prog_if, 0x02),
 };
 
-static void multi_2x_serial_pci_class_initfn(ObjectClass *klass, void *data)
+static void multi_2x_serial_pci_class_initfn(ObjectClass *klass,
+                                             const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
@@ -159,7 +160,8 @@ static void multi_2x_serial_pci_class_initfn(ObjectClass *klass, void *data)
     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 }
 
-static void multi_4x_serial_pci_class_initfn(ObjectClass *klass, void *data)
+static void multi_4x_serial_pci_class_initfn(ObjectClass *klass,
+                                             const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
@@ -192,7 +194,7 @@ static const TypeInfo multi_2x_serial_pci_info = {
     .instance_size = sizeof(PCIMultiSerialState),
     .instance_init = multi_serial_init,
     .class_init    = multi_2x_serial_pci_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -204,7 +206,7 @@ static const TypeInfo multi_4x_serial_pci_info = {
     .instance_size = sizeof(PCIMultiSerialState),
     .instance_init = multi_serial_init,
     .class_init    = multi_4x_serial_pci_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/char/serial-pci.c b/hw/char/serial-pci.c
index 6659cef5d4..8707e81914 100644
--- a/hw/char/serial-pci.c
+++ b/hw/char/serial-pci.c
@@ -85,7 +85,7 @@ static const Property serial_pci_properties[] = {
     DEFINE_PROP_UINT8("prog_if",  PCISerialState, prog_if, 0x02),
 };
 
-static void serial_pci_class_initfn(ObjectClass *klass, void *data)
+static void serial_pci_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
@@ -115,7 +115,7 @@ static const TypeInfo serial_pci_info = {
     .instance_size = sizeof(PCISerialState),
     .instance_init = serial_pci_init,
     .class_init    = serial_pci_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/char/serial.c b/hw/char/serial.c
index 70044e14a0..03fec3fe75 100644
--- a/hw/char/serial.c
+++ b/hw/char/serial.c
@@ -970,7 +970,7 @@ static const Property serial_properties[] = {
     DEFINE_PROP_BOOL("wakeup", SerialState, wakeup, false),
 };
 
-static void serial_class_init(ObjectClass *klass, void* data)
+static void serial_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/sh_serial.c b/hw/char/sh_serial.c
index 41c8175a63..6abd80386f 100644
--- a/hw/char/sh_serial.c
+++ b/hw/char/sh_serial.c
@@ -450,7 +450,7 @@ static const Property sh_serial_properties[] = {
     DEFINE_PROP_UINT8("features", SHSerialState, feat, 0),
 };
 
-static void sh_serial_class_init(ObjectClass *oc, void *data)
+static void sh_serial_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/char/shakti_uart.c b/hw/char/shakti_uart.c
index 09975d9d34..6e216edb0f 100644
--- a/hw/char/shakti_uart.c
+++ b/hw/char/shakti_uart.c
@@ -161,7 +161,7 @@ static const Property shakti_uart_properties[] = {
     DEFINE_PROP_CHR("chardev", ShaktiUartState, chr),
 };
 
-static void shakti_uart_class_init(ObjectClass *klass, void *data)
+static void shakti_uart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     device_class_set_legacy_reset(dc, shakti_uart_reset);
diff --git a/hw/char/sifive_uart.c b/hw/char/sifive_uart.c
index b45e6c098c..0fc89e76d1 100644
--- a/hw/char/sifive_uart.c
+++ b/hw/char/sifive_uart.c
@@ -334,7 +334,7 @@ static const VMStateDescription vmstate_sifive_uart = {
 };
 
 
-static void sifive_uart_class_init(ObjectClass *oc, void *data)
+static void sifive_uart_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ResettableClass *rc = RESETTABLE_CLASS(oc);
diff --git a/hw/char/spapr_vty.c b/hw/char/spapr_vty.c
index 6451d010ac..fc8ea604f8 100644
--- a/hw/char/spapr_vty.c
+++ b/hw/char/spapr_vty.c
@@ -182,7 +182,7 @@ static const VMStateDescription vmstate_spapr_vty = {
     },
 };
 
-static void spapr_vty_class_init(ObjectClass *klass, void *data)
+static void spapr_vty_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SpaprVioDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
diff --git a/hw/char/stm32f2xx_usart.c b/hw/char/stm32f2xx_usart.c
index 87882daa71..45c30643a7 100644
--- a/hw/char/stm32f2xx_usart.c
+++ b/hw/char/stm32f2xx_usart.c
@@ -220,7 +220,7 @@ static void stm32f2xx_usart_realize(DeviceState *dev, Error **errp)
                              s, NULL, true);
 }
 
-static void stm32f2xx_usart_class_init(ObjectClass *klass, void *data)
+static void stm32f2xx_usart_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/char/stm32l4x5_usart.c b/hw/char/stm32l4x5_usart.c
index bcc310bd97..afbe4bab29 100644
--- a/hw/char/stm32l4x5_usart.c
+++ b/hw/char/stm32l4x5_usart.c
@@ -594,7 +594,8 @@ static void stm32l4x5_usart_base_realize(DeviceState *dev, Error **errp)
                              s, NULL, true);
 }
 
-static void stm32l4x5_usart_base_class_init(ObjectClass *klass, void *data)
+static void stm32l4x5_usart_base_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -605,21 +606,21 @@ static void stm32l4x5_usart_base_class_init(ObjectClass *klass, void *data)
     dc->vmsd = &vmstate_stm32l4x5_usart_base;
 }
 
-static void stm32l4x5_usart_class_init(ObjectClass *oc, void *data)
+static void stm32l4x5_usart_class_init(ObjectClass *oc, const void *data)
 {
     Stm32l4x5UsartBaseClass *subc = STM32L4X5_USART_BASE_CLASS(oc);
 
     subc->type = STM32L4x5_USART;
 }
 
-static void stm32l4x5_uart_class_init(ObjectClass *oc, void *data)
+static void stm32l4x5_uart_class_init(ObjectClass *oc, const void *data)
 {
     Stm32l4x5UsartBaseClass *subc = STM32L4X5_USART_BASE_CLASS(oc);
 
     subc->type = STM32L4x5_UART;
 }
 
-static void stm32l4x5_lpuart_class_init(ObjectClass *oc, void *data)
+static void stm32l4x5_lpuart_class_init(ObjectClass *oc, const void *data)
 {
     Stm32l4x5UsartBaseClass *subc = STM32L4X5_USART_BASE_CLASS(oc);
 
diff --git a/hw/char/terminal3270.c b/hw/char/terminal3270.c
index 04ee26dcbd..d950c17292 100644
--- a/hw/char/terminal3270.c
+++ b/hw/char/terminal3270.c
@@ -292,7 +292,7 @@ static const VMStateDescription terminal3270_vmstate = {
     .unmigratable = 1,
 };
 
-static void terminal_class_init(ObjectClass *klass, void *data)
+static void terminal_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     EmulatedCcw3270Class *ck = EMULATED_CCW_3270_CLASS(klass);
diff --git a/hw/char/virtio-console.c b/hw/char/virtio-console.c
index aa6d611a47..0932a3572b 100644
--- a/hw/char/virtio-console.c
+++ b/hw/char/virtio-console.c
@@ -261,7 +261,7 @@ static void virtconsole_unrealize(DeviceState *dev)
     }
 }
 
-static void virtconsole_class_init(ObjectClass *klass, void *data)
+static void virtconsole_class_init(ObjectClass *klass, const void *data)
 {
     VirtIOSerialPortClass *k = VIRTIO_SERIAL_PORT_CLASS(klass);
 
@@ -278,7 +278,7 @@ static const Property virtserialport_properties[] = {
     DEFINE_PROP_CHR("chardev", VirtConsole, chr),
 };
 
-static void virtserialport_class_init(ObjectClass *klass, void *data)
+static void virtserialport_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOSerialPortClass *k = VIRTIO_SERIAL_PORT_CLASS(klass);
diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
index b6d2743a9c..eb79f5258b 100644
--- a/hw/char/virtio-serial-bus.c
+++ b/hw/char/virtio-serial-bus.c
@@ -840,7 +840,7 @@ static const Property virtser_props[] = {
     DEFINE_PROP_STRING("name", VirtIOSerialPort, name),
 };
 
-static void virtser_bus_class_init(ObjectClass *klass, void *data)
+static void virtser_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
     k->print_dev = virtser_bus_dev_print;
@@ -1092,7 +1092,7 @@ static void virtio_serial_device_realize(DeviceState *dev, Error **errp)
     QLIST_INSERT_HEAD(&vserdevices.devices, vser, next);
 }
 
-static void virtio_serial_port_class_init(ObjectClass *klass, void *data)
+static void virtio_serial_port_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
 
@@ -1159,7 +1159,7 @@ static const Property virtio_serial_properties[] = {
                       VIRTIO_CONSOLE_F_EMERG_WRITE, true),
 };
 
-static void virtio_serial_class_init(ObjectClass *klass, void *data)
+static void virtio_serial_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
@@ -1188,7 +1188,7 @@ static const TypeInfo virtio_device_info = {
     .parent = TYPE_VIRTIO_DEVICE,
     .instance_size = sizeof(VirtIOSerial),
     .class_init = virtio_serial_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
diff --git a/hw/char/xen_console.c b/hw/char/xen_console.c
index d03c188d1d..9c34a554bf 100644
--- a/hw/char/xen_console.c
+++ b/hw/char/xen_console.c
@@ -492,7 +492,7 @@ static const Property xen_console_properties[] = {
     DEFINE_PROP_INT32("idx", XenConsole, dev, -1),
 };
 
-static void xen_console_class_init(ObjectClass *class, void *data)
+static void xen_console_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dev_class = DEVICE_CLASS(class);
     XenDeviceClass *xendev_class = XEN_DEVICE_CLASS(class);
diff --git a/hw/char/xilinx_uartlite.c b/hw/char/xilinx_uartlite.c
index 4037c937ee..8008171eea 100644
--- a/hw/char/xilinx_uartlite.c
+++ b/hw/char/xilinx_uartlite.c
@@ -241,7 +241,7 @@ static void xilinx_uartlite_init(Object *obj)
     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 }
 
-static void xilinx_uartlite_class_init(ObjectClass *klass, void *data)
+static void xilinx_uartlite_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/core/bus.c b/hw/core/bus.c
index b9d89495cd..bddfc22d38 100644
--- a/hw/core/bus.c
+++ b/hw/core/bus.c
@@ -232,7 +232,7 @@ static char *default_bus_get_fw_dev_path(DeviceState *dev)
     return g_strdup(object_get_typename(OBJECT(dev)));
 }
 
-static void bus_class_init(ObjectClass *class, void *data)
+static void bus_class_init(ObjectClass *class, const void *data)
 {
     BusClass *bc = BUS_CLASS(class);
     ResettableClass *rc = RESETTABLE_CLASS(class);
@@ -260,7 +260,7 @@ static const TypeInfo bus_info = {
     .instance_init = qbus_initfn,
     .instance_finalize = qbus_finalize,
     .class_init = bus_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_RESETTABLE_INTERFACE },
         { }
     },
diff --git a/hw/core/clock.c b/hw/core/clock.c
index a81f888e62..9c906761e1 100644
--- a/hw/core/clock.c
+++ b/hw/core/clock.c
@@ -206,7 +206,7 @@ static void clock_finalizefn(Object *obj)
     g_free(clk->canonical_path);
 }
 
-static void clock_class_init(ObjectClass *klass, void *data)
+static void clock_class_init(ObjectClass *klass, const void *data)
 {
     klass->unparent = clock_unparent;
 }
diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c
index 9064dd24f8..92c40b6bf8 100644
--- a/hw/core/cpu-common.c
+++ b/hw/core/cpu-common.c
@@ -25,6 +25,9 @@
 #include "qemu/log.h"
 #include "qemu/main-loop.h"
 #include "qemu/lockcnt.h"
+#include "qemu/error-report.h"
+#include "qemu/qemu-print.h"
+#include "qemu/target-info.h"
 #include "exec/log.h"
 #include "exec/gdbstub.h"
 #include "system/tcg.h"
@@ -152,6 +155,21 @@ ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
     return NULL;
 }
 
+char *cpu_model_from_type(const char *typename)
+{
+    g_autofree char *suffix = g_strdup_printf("-%s", target_cpu_type());
+
+    if (!object_class_by_name(typename)) {
+        return NULL;
+    }
+
+    if (g_str_has_suffix(typename, suffix)) {
+        return g_strndup(typename, strlen(typename) - strlen(suffix));
+    }
+
+    return g_strdup(typename);
+}
+
 static void cpu_common_parse_features(const char *typename, char *features,
                                       Error **errp)
 {
@@ -183,6 +201,33 @@ static void cpu_common_parse_features(const char *typename, char *features,
     }
 }
 
+const char *parse_cpu_option(const char *cpu_option)
+{
+    ObjectClass *oc;
+    CPUClass *cc;
+    gchar **model_pieces;
+    const char *cpu_type;
+
+    model_pieces = g_strsplit(cpu_option, ",", 2);
+    if (!model_pieces[0]) {
+        error_report("-cpu option cannot be empty");
+        exit(1);
+    }
+
+    oc = cpu_class_by_name(target_cpu_type(), model_pieces[0]);
+    if (oc == NULL) {
+        error_report("unable to find CPU model '%s'", model_pieces[0]);
+        g_strfreev(model_pieces);
+        exit(EXIT_FAILURE);
+    }
+
+    cpu_type = object_class_get_name(oc);
+    cc = CPU_CLASS(oc);
+    cc->parse_features(cpu_type, model_pieces[1], &error_fatal);
+    g_strfreev(model_pieces);
+    return cpu_type;
+}
+
 bool cpu_exec_realizefn(CPUState *cpu, Error **errp)
 {
     if (!accel_cpu_common_realize(cpu, errp)) {
@@ -320,7 +365,7 @@ static int64_t cpu_common_get_arch_id(CPUState *cpu)
     return cpu->cpu_index;
 }
 
-static void cpu_common_class_init(ObjectClass *klass, void *data)
+static void cpu_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -359,3 +404,32 @@ static void cpu_register_types(void)
 }
 
 type_init(cpu_register_types)
+
+static void cpu_list_entry(gpointer data, gpointer user_data)
+{
+    CPUClass *cc = CPU_CLASS(OBJECT_CLASS(data));
+    const char *typename = object_class_get_name(OBJECT_CLASS(data));
+    g_autofree char *model = cpu_model_from_type(typename);
+
+    if (cc->deprecation_note) {
+        qemu_printf("  %s (deprecated)\n", model);
+    } else {
+        qemu_printf("  %s\n", model);
+    }
+}
+
+void list_cpus(void)
+{
+    CPUClass *cc = CPU_CLASS(object_class_by_name(target_cpu_type()));
+
+    if (cc->list_cpus) {
+        cc->list_cpus();
+    } else {
+        GSList *list;
+
+        list = object_class_get_list_sorted(TYPE_CPU, false);
+        qemu_printf("Available CPUs:\n");
+        g_slist_foreach(list, cpu_list_entry, NULL);
+        g_slist_free(list);
+    }
+}
diff --git a/hw/core/cpu-system.c b/hw/core/cpu-system.c
index 82b68b8927..3c84176a0c 100644
--- a/hw/core/cpu-system.c
+++ b/hw/core/cpu-system.c
@@ -133,7 +133,7 @@ bool cpu_virtio_is_big_endian(CPUState *cpu)
     if (cpu->cc->sysemu_ops->virtio_is_big_endian) {
         return cpu->cc->sysemu_ops->virtio_is_big_endian(cpu);
     }
-    return target_words_bigendian();
+    return target_big_endian();
 }
 
 GuestPanicInformation *cpu_get_crash_info(CPUState *cpu)
diff --git a/hw/core/generic-loader.c b/hw/core/generic-loader.c
index d3a426a1a2..e72bbde2a2 100644
--- a/hw/core/generic-loader.c
+++ b/hw/core/generic-loader.c
@@ -182,7 +182,7 @@ static const Property generic_loader_props[] = {
     DEFINE_PROP_STRING("file", GenericLoaderState, file),
 };
 
-static void generic_loader_class_init(ObjectClass *klass, void *data)
+static void generic_loader_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/core/guest-loader.c b/hw/core/guest-loader.c
index 76271df9f5..3db89d7a2e 100644
--- a/hw/core/guest-loader.c
+++ b/hw/core/guest-loader.c
@@ -118,7 +118,7 @@ static const Property guest_loader_props[] = {
     DEFINE_PROP_STRING("initrd", GuestLoaderState, initrd),
 };
 
-static void guest_loader_class_init(ObjectClass *klass, void *data)
+static void guest_loader_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/core/loader.c b/hw/core/loader.c
index a3aa62d132..b792a54bb0 100644
--- a/hw/core/loader.c
+++ b/hw/core/loader.c
@@ -1410,7 +1410,7 @@ typedef struct RomSec {
  * work, but this way saves a little work later by avoiding
  * dealing with "gaps" of 0 length.
  */
-static gint sort_secs(gconstpointer a, gconstpointer b)
+static gint sort_secs(gconstpointer a, gconstpointer b, gpointer d)
 {
     RomSec *ra = (RomSec *) a;
     RomSec *rb = (RomSec *) b;
@@ -1463,7 +1463,7 @@ RomGap rom_find_largest_gap_between(hwaddr base, size_t size)
     /* sentinel */
     secs = add_romsec_to_list(secs, base + size, 1);
 
-    secs = g_list_sort(secs, sort_secs);
+    secs = g_list_sort_with_data(secs, sort_secs, NULL);
 
     for (it = g_list_first(secs); it; it = g_list_next(it)) {
         cand = (RomSec *) it->data;
diff --git a/hw/core/machine-qmp-cmds.c b/hw/core/machine-qmp-cmds.c
index fd8b4e0b44..d82043e1c6 100644
--- a/hw/core/machine-qmp-cmds.c
+++ b/hw/core/machine-qmp-cmds.c
@@ -19,6 +19,7 @@
 #include "qapi/qobject-input-visitor.h"
 #include "qapi/type-helpers.h"
 #include "qemu/uuid.h"
+#include "qemu/target-info.h"
 #include "qom/qom-qobject.h"
 #include "system/hostmem.h"
 #include "system/hw_accel.h"
@@ -73,6 +74,7 @@ MachineInfoList *qmp_query_machines(bool has_compat_props, bool compat_props,
 
     for (el = machines; el; el = el->next) {
         MachineClass *mc = el->data;
+        const char *default_cpu_type = machine_class_default_cpu_type(mc);
         MachineInfo *info;
 
         info = g_malloc0(sizeof(*info));
@@ -91,8 +93,8 @@ MachineInfoList *qmp_query_machines(bool has_compat_props, bool compat_props,
         info->numa_mem_supported = mc->numa_mem_supported;
         info->deprecated = !!mc->deprecation_reason;
         info->acpi = !!object_class_property_find(OBJECT_CLASS(mc), "acpi");
-        if (mc->default_cpu_type) {
-            info->default_cpu_type = g_strdup(mc->default_cpu_type);
+        if (default_cpu_type) {
+            info->default_cpu_type = g_strdup(default_cpu_type);
         }
         if (mc->default_ram_id) {
             info->default_ram_id = g_strdup(mc->default_ram_id);
@@ -133,9 +135,9 @@ CurrentMachineParams *qmp_query_current_machine(Error **errp)
     return params;
 }
 
-TargetInfo *qmp_query_target(Error **errp)
+QemuTargetInfo *qmp_query_target(Error **errp)
 {
-    TargetInfo *info = g_malloc0(sizeof(*info));
+    QemuTargetInfo *info = g_malloc0(sizeof(*info));
 
     info->arch = qapi_enum_parse(&SysEmuTarget_lookup, target_name(), -1,
                                  &error_abort);
diff --git a/hw/core/machine.c b/hw/core/machine.c
index abfcedd4a5..ed01798d37 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -1100,7 +1100,7 @@ out:
     return r;
 }
 
-static void machine_class_init(ObjectClass *oc, void *data)
+static void machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -1243,7 +1243,7 @@ static void machine_class_init(ObjectClass *oc, void *data)
         "Memory size configuration");
 }
 
-static void machine_class_base_init(ObjectClass *oc, void *data)
+static void machine_class_base_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     mc->max_cpus = mc->max_cpus ?: 1;
diff --git a/hw/core/or-irq.c b/hw/core/or-irq.c
index 4d0d3cabf1..3942c70993 100644
--- a/hw/core/or-irq.c
+++ b/hw/core/or-irq.c
@@ -119,7 +119,7 @@ static const Property or_irq_properties[] = {
     DEFINE_PROP_UINT16("num-lines", OrIRQState, num_lines, 1),
 };
 
-static void or_irq_class_init(ObjectClass *klass, void *data)
+static void or_irq_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/core/platform-bus.c b/hw/core/platform-bus.c
index 1d00c4d36d..6950063de4 100644
--- a/hw/core/platform-bus.c
+++ b/hw/core/platform-bus.c
@@ -209,7 +209,7 @@ static const Property platform_bus_properties[] = {
     DEFINE_PROP_UINT32("mmio_size", PlatformBusDevice, mmio_size, 0),
 };
 
-static void platform_bus_class_init(ObjectClass *klass, void *data)
+static void platform_bus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 2745b5e092..f600226176 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -693,7 +693,7 @@ static void device_finalize(Object *obj)
     g_free(dev->id);
 }
 
-static void device_class_base_init(ObjectClass *class, void *data)
+static void device_class_base_init(ObjectClass *class, const void *data)
 {
     DeviceClass *klass = DEVICE_CLASS(class);
 
@@ -731,7 +731,7 @@ device_vmstate_if_get_id(VMStateIf *obj)
     return qdev_get_dev_path(dev);
 }
 
-static void device_class_init(ObjectClass *class, void *data)
+static void device_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(class);
     VMStateIfClass *vc = VMSTATE_IF_CLASS(class);
@@ -870,7 +870,7 @@ static const TypeInfo device_type_info = {
     .class_init = device_class_init,
     .abstract = true,
     .class_size = sizeof(DeviceClass),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_VMSTATE_IF },
         { TYPE_RESETTABLE_INTERFACE },
         { }
diff --git a/hw/core/register.c b/hw/core/register.c
index 95b0150c0a..8f63d9f227 100644
--- a/hw/core/register.c
+++ b/hw/core/register.c
@@ -319,7 +319,7 @@ void register_finalize_block(RegisterInfoArray *r_array)
     g_free(r_array);
 }
 
-static void register_class_init(ObjectClass *oc, void *data)
+static void register_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/core/reset.c b/hw/core/reset.c
index 8a3e0e518f..65f82fa43d 100644
--- a/hw/core/reset.c
+++ b/hw/core/reset.c
@@ -84,7 +84,7 @@ static void legacy_reset_finalize(Object *obj)
 {
 }
 
-static void legacy_reset_class_init(ObjectClass *klass, void *data)
+static void legacy_reset_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
 
diff --git a/hw/core/resetcontainer.c b/hw/core/resetcontainer.c
index e4ece68e83..5ff17002e7 100644
--- a/hw/core/resetcontainer.c
+++ b/hw/core/resetcontainer.c
@@ -68,7 +68,8 @@ static void resettable_container_finalize(Object *obj)
 {
 }
 
-static void resettable_container_class_init(ObjectClass *klass, void *data)
+static void resettable_container_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
 
diff --git a/hw/core/split-irq.c b/hw/core/split-irq.c
index fc12274811..f8b48750c5 100644
--- a/hw/core/split-irq.c
+++ b/hw/core/split-irq.c
@@ -63,7 +63,7 @@ static const Property split_irq_properties[] = {
     DEFINE_PROP_UINT16("num-lines", SplitIRQ, num_lines, 1),
 };
 
-static void split_irq_class_init(ObjectClass *klass, void *data)
+static void split_irq_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/core/sysbus.c b/hw/core/sysbus.c
index 6eb4c0f15a..e71367adfb 100644
--- a/hw/core/sysbus.c
+++ b/hw/core/sysbus.c
@@ -71,7 +71,7 @@ void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque)
 }
 
 
-static void system_bus_class_init(ObjectClass *klass, void *data)
+static void system_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
@@ -280,7 +280,7 @@ static char *sysbus_get_fw_dev_path(DeviceState *dev)
     return g_strdup(qdev_fw_name(dev));
 }
 
-static void sysbus_device_class_init(ObjectClass *klass, void *data)
+static void sysbus_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->realize = sysbus_device_realize;
@@ -320,7 +320,8 @@ BusState *sysbus_get_default(void)
     return main_system_bus;
 }
 
-static void dynamic_sysbus_device_class_init(ObjectClass *klass, void *data)
+static void dynamic_sysbus_device_class_init(ObjectClass *klass,
+                                             const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
 
diff --git a/hw/cpu/a15mpcore.c b/hw/cpu/a15mpcore.c
index 676f65a0af..bd36dd94d4 100644
--- a/hw/cpu/a15mpcore.c
+++ b/hw/cpu/a15mpcore.c
@@ -161,7 +161,7 @@ static const Property a15mp_priv_properties[] = {
     DEFINE_PROP_UINT32("num-irq", A15MPPrivState, num_irq, 0),
 };
 
-static void a15mp_priv_class_init(ObjectClass *klass, void *data)
+static void a15mp_priv_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/cpu/a9mpcore.c b/hw/cpu/a9mpcore.c
index 1b9f2bef93..64bebbd19c 100644
--- a/hw/cpu/a9mpcore.c
+++ b/hw/cpu/a9mpcore.c
@@ -175,7 +175,7 @@ static const Property a9mp_priv_properties[] = {
     DEFINE_PROP_UINT32("num-irq", A9MPPrivState, num_irq, 0),
 };
 
-static void a9mp_priv_class_init(ObjectClass *klass, void *data)
+static void a9mp_priv_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/cpu/arm11mpcore.c b/hw/cpu/arm11mpcore.c
index b56bee6d54..01772e7f77 100644
--- a/hw/cpu/arm11mpcore.c
+++ b/hw/cpu/arm11mpcore.c
@@ -144,7 +144,7 @@ static const Property mpcore_priv_properties[] = {
     DEFINE_PROP_UINT32("num-irq", ARM11MPCorePriveState, num_irq, 64),
 };
 
-static void mpcore_priv_class_init(ObjectClass *klass, void *data)
+static void mpcore_priv_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/cpu/cluster.c b/hw/cpu/cluster.c
index 9da5221f88..ef3b3d1e94 100644
--- a/hw/cpu/cluster.c
+++ b/hw/cpu/cluster.c
@@ -72,7 +72,7 @@ static void cpu_cluster_realize(DeviceState *dev, Error **errp)
     assert(cbdata.cpu_count > 0);
 }
 
-static void cpu_cluster_class_init(ObjectClass *klass, void *data)
+static void cpu_cluster_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/cpu/core.c b/hw/cpu/core.c
index 495a5c30ff..5cb2e9a7f5 100644
--- a/hw/cpu/core.c
+++ b/hw/cpu/core.c
@@ -77,7 +77,7 @@ static void cpu_core_instance_init(Object *obj)
     }
 }
 
-static void cpu_core_class_init(ObjectClass *oc, void *data)
+static void cpu_core_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/cpu/realview_mpcore.c b/hw/cpu/realview_mpcore.c
index b140888618..099b71a9ef 100644
--- a/hw/cpu/realview_mpcore.c
+++ b/hw/cpu/realview_mpcore.c
@@ -107,7 +107,7 @@ static void mpcore_rirq_init(Object *obj)
     }
 }
 
-static void mpcore_rirq_class_init(ObjectClass *klass, void *data)
+static void mpcore_rirq_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/cxl/switch-mailbox-cci.c b/hw/cxl/switch-mailbox-cci.c
index 833b824619..223f220433 100644
--- a/hw/cxl/switch-mailbox-cci.c
+++ b/hw/cxl/switch-mailbox-cci.c
@@ -72,7 +72,7 @@ static const Property cxl_switch_cci_props[] = {
                      target, TYPE_CXL_USP, PCIDevice *),
 };
 
-static void cswmbcci_class_init(ObjectClass *oc, void *data)
+static void cswmbcci_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
@@ -99,7 +99,7 @@ static const TypeInfo cswmbcci_info = {
     .parent = TYPE_PCI_DEVICE,
     .class_init = cswmbcci_class_init,
     .instance_size = sizeof(CSWMBCCIDev),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { }
     },
diff --git a/hw/display/apple-gfx-mmio.m b/hw/display/apple-gfx-mmio.m
index b2e0e7a30f..b0b6e2993e 100644
--- a/hw/display/apple-gfx-mmio.m
+++ b/hw/display/apple-gfx-mmio.m
@@ -261,7 +261,7 @@ static const Property apple_gfx_mmio_properties[] = {
                       qdev_prop_apple_gfx_display_mode, AppleGFXDisplayMode),
 };
 
-static void apple_gfx_mmio_class_init(ObjectClass *klass, void *data)
+static void apple_gfx_mmio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/display/apple-gfx-pci.m b/hw/display/apple-gfx-pci.m
index b939bb9b23..b0694f4cb8 100644
--- a/hw/display/apple-gfx-pci.m
+++ b/hw/display/apple-gfx-pci.m
@@ -121,7 +121,7 @@ static const Property apple_gfx_pci_properties[] = {
                       qdev_prop_apple_gfx_display_mode, AppleGFXDisplayMode),
 };
 
-static void apple_gfx_pci_class_init(ObjectClass *klass, void *data)
+static void apple_gfx_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pci = PCI_DEVICE_CLASS(klass);
@@ -147,7 +147,7 @@ static const TypeInfo apple_gfx_pci_types[] = {
         .instance_size = sizeof(AppleGFXPCIState),
         .class_init    = apple_gfx_pci_class_init,
         .instance_init = apple_gfx_pci_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { INTERFACE_PCIE_DEVICE },
             { },
         },
diff --git a/hw/display/artist.c b/hw/display/artist.c
index f24c1d83dd..3fafc8a222 100644
--- a/hw/display/artist.c
+++ b/hw/display/artist.c
@@ -1487,7 +1487,7 @@ static void artist_reset(DeviceState *qdev)
 {
 }
 
-static void artist_class_init(ObjectClass *klass, void *data)
+static void artist_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/ati.c b/hw/display/ati.c
index 864fa4fc2c..7de27732cd 100644
--- a/hw/display/ati.c
+++ b/hw/display/ati.c
@@ -1049,7 +1049,7 @@ static const Property ati_vga_properties[] = {
     DEFINE_PROP_UINT8("x-pixman", ATIVGAState, use_pixman, DEFAULT_X_PIXMAN),
 };
 
-static void ati_vga_class_init(ObjectClass *klass, void *data)
+static void ati_vga_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1079,7 +1079,7 @@ static const TypeInfo ati_vga_info = {
     .instance_size = sizeof(ATIVGAState),
     .class_init = ati_vga_class_init,
     .instance_init = ati_vga_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
           { INTERFACE_CONVENTIONAL_PCI_DEVICE },
           { },
     },
diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index a5bded5156..820e67ac8b 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -442,7 +442,7 @@ static const Property bcm2835_fb_props[] = {
                        initial_config.alpha, 2), /* alpha ignored */
 };
 
-static void bcm2835_fb_class_init(ObjectClass *klass, void *data)
+static void bcm2835_fb_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/bochs-display.c b/hw/display/bochs-display.c
index 086f7a0f06..ad2821c974 100644
--- a/hw/display/bochs-display.c
+++ b/hw/display/bochs-display.c
@@ -351,7 +351,7 @@ static const Property bochs_display_properties[] = {
     DEFINE_EDID_PROPERTIES(BochsDisplayState, edid_info),
 };
 
-static void bochs_display_class_init(ObjectClass *klass, void *data)
+static void bochs_display_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -374,7 +374,7 @@ static const TypeInfo bochs_display_type_info = {
     .instance_size  = sizeof(BochsDisplayState),
     .instance_init  = bochs_display_init,
     .class_init     = bochs_display_class_init,
-    .interfaces     = (InterfaceInfo[]) {
+    .interfaces     = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
diff --git a/hw/display/cg3.c b/hw/display/cg3.c
index 3f971d875f..daeef15217 100644
--- a/hw/display/cg3.c
+++ b/hw/display/cg3.c
@@ -368,7 +368,7 @@ static const Property cg3_properties[] = {
     DEFINE_PROP_UINT16("depth",        CG3State, depth,     -1),
 };
 
-static void cg3_class_init(ObjectClass *klass, void *data)
+static void cg3_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c
index 76124d3656..ef08694626 100644
--- a/hw/display/cirrus_vga.c
+++ b/hw/display/cirrus_vga.c
@@ -2991,7 +2991,7 @@ static const Property pci_vga_cirrus_properties[] = {
                      cirrus_vga.vga.global_vmstate, false),
 };
 
-static void cirrus_vga_class_init(ObjectClass *klass, void *data)
+static void cirrus_vga_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -3013,7 +3013,7 @@ static const TypeInfo cirrus_vga_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCICirrusVGAState),
     .class_init    = cirrus_vga_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/display/cirrus_vga_isa.c b/hw/display/cirrus_vga_isa.c
index 60b7fd20f1..4b55c48eff 100644
--- a/hw/display/cirrus_vga_isa.c
+++ b/hw/display/cirrus_vga_isa.c
@@ -76,7 +76,7 @@ static const Property isa_cirrus_vga_properties[] = {
                      cirrus_vga.enable_blitter, true),
 };
 
-static void isa_cirrus_vga_class_init(ObjectClass *klass, void *data)
+static void isa_cirrus_vga_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/dm163.c b/hw/display/dm163.c
index f6f0ec0c63..f8340d8275 100644
--- a/hw/display/dm163.c
+++ b/hw/display/dm163.c
@@ -325,7 +325,7 @@ static void dm163_realize(DeviceState *dev, Error **errp)
                         RGB_MATRIX_NUM_ROWS * LED_SQUARE_SIZE);
 }
 
-static void dm163_class_init(ObjectClass *klass, void *data)
+static void dm163_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/display/dpcd.c b/hw/display/dpcd.c
index 108faf7887..a157dc64e7 100644
--- a/hw/display/dpcd.c
+++ b/hw/display/dpcd.c
@@ -141,7 +141,7 @@ static const VMStateDescription vmstate_dpcd = {
     }
 };
 
-static void dpcd_class_init(ObjectClass *oc, void *data)
+static void dpcd_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/display/exynos4210_fimd.c b/hw/display/exynos4210_fimd.c
index 04c864a308..c61e0280a7 100644
--- a/hw/display/exynos4210_fimd.c
+++ b/hw/display/exynos4210_fimd.c
@@ -1958,7 +1958,7 @@ static void exynos4210_fimd_realize(DeviceState *dev, Error **errp)
     s->console = graphic_console_init(dev, 0, &exynos4210_fimd_ops, s);
 }
 
-static void exynos4210_fimd_class_init(ObjectClass *klass, void *data)
+static void exynos4210_fimd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/g364fb.c b/hw/display/g364fb.c
index 30b5ea67f2..a6ddc21d3e 100644
--- a/hw/display/g364fb.c
+++ b/hw/display/g364fb.c
@@ -526,7 +526,7 @@ static const VMStateDescription vmstate_g364fb_sysbus = {
     }
 };
 
-static void g364fb_sysbus_class_init(ObjectClass *klass, void *data)
+static void g364fb_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/i2c-ddc.c b/hw/display/i2c-ddc.c
index d8ab9eee40..2adfc1a147 100644
--- a/hw/display/i2c-ddc.c
+++ b/hw/display/i2c-ddc.c
@@ -99,7 +99,7 @@ static const Property i2c_ddc_properties[] = {
     DEFINE_EDID_PROPERTIES(I2CDDCState, edid_info),
 };
 
-static void i2c_ddc_class_init(ObjectClass *oc, void *data)
+static void i2c_ddc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     I2CSlaveClass *isc = I2C_SLAVE_CLASS(oc);
diff --git a/hw/display/jazz_led.c b/hw/display/jazz_led.c
index 1448488d06..90e82b58be 100644
--- a/hw/display/jazz_led.c
+++ b/hw/display/jazz_led.c
@@ -294,7 +294,7 @@ static void jazz_led_reset(DeviceState *d)
     qemu_console_resize(s->con, 60, 80);
 }
 
-static void jazz_led_class_init(ObjectClass *klass, void *data)
+static void jazz_led_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/macfb.c b/hw/display/macfb.c
index b08eb06cbd..574d667173 100644
--- a/hw/display/macfb.c
+++ b/hw/display/macfb.c
@@ -793,7 +793,7 @@ static const VMStateDescription vmstate_macfb_nubus = {
     }
 };
 
-static void macfb_sysbus_class_init(ObjectClass *klass, void *data)
+static void macfb_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -804,7 +804,7 @@ static void macfb_sysbus_class_init(ObjectClass *klass, void *data)
     device_class_set_props(dc, macfb_sysbus_properties);
 }
 
-static void macfb_nubus_class_init(ObjectClass *klass, void *data)
+static void macfb_nubus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     MacfbNubusDeviceClass *ndc = NUBUS_MACFB_CLASS(klass);
diff --git a/hw/display/next-fb.c b/hw/display/next-fb.c
index 8446ff3c00..ec81b766a7 100644
--- a/hw/display/next-fb.c
+++ b/hw/display/next-fb.c
@@ -119,7 +119,7 @@ static void nextfb_realize(DeviceState *dev, Error **errp)
     qemu_console_resize(s->con, s->cols, s->rows);
 }
 
-static void nextfb_class_init(ObjectClass *oc, void *data)
+static void nextfb_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/display/pl110.c b/hw/display/pl110.c
index 4d4f477b94..09c3c59e0e 100644
--- a/hw/display/pl110.c
+++ b/hw/display/pl110.c
@@ -580,7 +580,7 @@ static void pl111_init(Object *obj)
     s->version = VERSION_PL111;
 }
 
-static void pl110_class_init(ObjectClass *klass, void *data)
+static void pl110_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index da14da5209..18f482ca7f 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -2498,7 +2498,7 @@ static const Property qxl_properties[] = {
         DEFINE_PROP_BOOL("global-vmstate", PCIQXLDevice, vga.global_vmstate, false),
 };
 
-static void qxl_pci_class_init(ObjectClass *klass, void *data)
+static void qxl_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -2517,13 +2517,13 @@ static const TypeInfo qxl_pci_type_info = {
     .instance_size = sizeof(PCIQXLDevice),
     .abstract = true,
     .class_init = qxl_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-static void qxl_primary_class_init(ObjectClass *klass, void *data)
+static void qxl_primary_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -2543,7 +2543,7 @@ static const TypeInfo qxl_primary_info = {
 module_obj("qxl-vga");
 module_kconfig(QXL);
 
-static void qxl_secondary_class_init(ObjectClass *klass, void *data)
+static void qxl_secondary_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/display/ramfb-standalone.c b/hw/display/ramfb-standalone.c
index 1be106b57f..08f2d5db4e 100644
--- a/hw/display/ramfb-standalone.c
+++ b/hw/display/ramfb-standalone.c
@@ -64,7 +64,7 @@ static const Property ramfb_properties[] = {
     DEFINE_PROP_BOOL("x-migrate", RAMFBStandaloneState, migrate,  true),
 };
 
-static void ramfb_class_initfn(ObjectClass *klass, void *data)
+static void ramfb_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/sii9022.c b/hw/display/sii9022.c
index 16f8cb487c..d00d3e9fc5 100644
--- a/hw/display/sii9022.c
+++ b/hw/display/sii9022.c
@@ -167,7 +167,7 @@ static void sii9022_realize(DeviceState *dev, Error **errp)
     i2c_slave_create_simple(bus, TYPE_I2CDDC, 0x50);
 }
 
-static void sii9022_class_init(ObjectClass *klass, void *data)
+static void sii9022_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
diff --git a/hw/display/sm501.c b/hw/display/sm501.c
index 09edcf86f8..6d2f18684c 100644
--- a/hw/display/sm501.c
+++ b/hw/display/sm501.c
@@ -2077,7 +2077,7 @@ static const VMStateDescription vmstate_sm501_sysbus = {
      }
 };
 
-static void sm501_sysbus_class_init(ObjectClass *klass, void *data)
+static void sm501_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -2167,7 +2167,7 @@ static const VMStateDescription vmstate_sm501_pci = {
      }
 };
 
-static void sm501_pci_class_init(ObjectClass *klass, void *data)
+static void sm501_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -2196,7 +2196,7 @@ static const TypeInfo sm501_pci_info = {
     .instance_size = sizeof(SM501PCIState),
     .class_init    = sm501_pci_class_init,
     .instance_init = sm501_pci_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/display/ssd0303.c b/hw/display/ssd0303.c
index e292cff44e..87781438cd 100644
--- a/hw/display/ssd0303.c
+++ b/hw/display/ssd0303.c
@@ -311,7 +311,7 @@ static void ssd0303_realize(DeviceState *dev, Error **errp)
     qemu_console_resize(s->con, 96 * MAGNIFY, 16 * MAGNIFY);
 }
 
-static void ssd0303_class_init(ObjectClass *klass, void *data)
+static void ssd0303_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
diff --git a/hw/display/ssd0323.c b/hw/display/ssd0323.c
index 96cf0dc662..af5ff4fecd 100644
--- a/hw/display/ssd0323.c
+++ b/hw/display/ssd0323.c
@@ -361,7 +361,7 @@ static void ssd0323_realize(SSIPeripheral *d, Error **errp)
     qdev_init_gpio_in(dev, ssd0323_cd, 1);
 }
 
-static void ssd0323_class_init(ObjectClass *klass, void *data)
+static void ssd0323_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
diff --git a/hw/display/tcx.c b/hw/display/tcx.c
index 5968d33e48..4853c5e142 100644
--- a/hw/display/tcx.c
+++ b/hw/display/tcx.c
@@ -885,7 +885,7 @@ static const Property tcx_properties[] = {
     DEFINE_PROP_UINT16("depth",    TCXState, depth,     -1),
 };
 
-static void tcx_class_init(ObjectClass *klass, void *data)
+static void tcx_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/vga-isa.c b/hw/display/vga-isa.c
index 2920628f78..3618913b3b 100644
--- a/hw/display/vga-isa.c
+++ b/hw/display/vga-isa.c
@@ -92,7 +92,7 @@ static const Property vga_isa_properties[] = {
     DEFINE_PROP_UINT32("vgamem_mb", ISAVGAState, state.vram_size_mb, 8),
 };
 
-static void vga_isa_class_initfn(ObjectClass *klass, void *data)
+static void vga_isa_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/vga-mmio.c b/hw/display/vga-mmio.c
index 1e0c2dbf74..33263856b7 100644
--- a/hw/display/vga-mmio.c
+++ b/hw/display/vga-mmio.c
@@ -116,7 +116,7 @@ static const Property vga_mmio_properties[] = {
     DEFINE_PROP_UINT32("vgamem_mb", VGAMmioState, vga.vram_size_mb, 8),
 };
 
-static void vga_mmio_class_initfn(ObjectClass *klass, void *data)
+static void vga_mmio_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/display/vga-pci.c b/hw/display/vga-pci.c
index dd084c20b1..b81f7fd2d0 100644
--- a/hw/display/vga-pci.c
+++ b/hw/display/vga-pci.c
@@ -350,7 +350,7 @@ static const Property secondary_pci_properties[] = {
     DEFINE_EDID_PROPERTIES(PCIVGAState, edid_info),
 };
 
-static void vga_pci_class_init(ObjectClass *klass, void *data)
+static void vga_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -369,14 +369,14 @@ static const TypeInfo vga_pci_type_info = {
     .instance_size = sizeof(PCIVGAState),
     .abstract = true,
     .class_init = vga_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
 };
 
-static void vga_class_init(ObjectClass *klass, void *data)
+static void vga_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -392,7 +392,7 @@ static void vga_class_init(ObjectClass *klass, void *data)
                                    vga_get_big_endian_fb, vga_set_big_endian_fb);
 }
 
-static void secondary_class_init(ObjectClass *klass, void *data)
+static void secondary_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/display/vga.c b/hw/display/vga.c
index b01f67c65f..20475ebbd3 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -2264,7 +2264,7 @@ bool vga_common_init(VGACommonState *s, Object *obj, Error **errp)
      * into a device attribute set by the machine/platform to remove
      * all target endian dependencies from this file.
      */
-    s->default_endian_fb = target_words_bigendian();
+    s->default_endian_fb = target_big_endian();
     s->big_endian_fb = s->default_endian_fb;
 
     vga_dirty_log_start(s);
diff --git a/hw/display/vhost-user-gpu.c b/hw/display/vhost-user-gpu.c
index 2aed6243f6..06c4e7e190 100644
--- a/hw/display/vhost-user-gpu.c
+++ b/hw/display/vhost-user-gpu.c
@@ -658,7 +658,7 @@ static const Property vhost_user_gpu_properties[] = {
 };
 
 static void
-vhost_user_gpu_class_init(ObjectClass *klass, void *data)
+vhost_user_gpu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c
index 321a6f4998..9eb806b71f 100644
--- a/hw/display/virtio-gpu-base.c
+++ b/hw/display/virtio-gpu-base.c
@@ -262,7 +262,7 @@ virtio_gpu_base_device_unrealize(DeviceState *qdev)
 }
 
 static void
-virtio_gpu_base_class_init(ObjectClass *klass, void *data)
+virtio_gpu_base_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/display/virtio-gpu-gl.c b/hw/display/virtio-gpu-gl.c
index 683fad3bf8..c06a078fb3 100644
--- a/hw/display/virtio-gpu-gl.c
+++ b/hw/display/virtio-gpu-gl.c
@@ -182,7 +182,7 @@ static void virtio_gpu_gl_device_unrealize(DeviceState *qdev)
     g_array_unref(g->capset_ids);
 }
 
-static void virtio_gpu_gl_class_init(ObjectClass *klass, void *data)
+static void virtio_gpu_gl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/display/virtio-gpu-pci-rutabaga.c b/hw/display/virtio-gpu-pci-rutabaga.c
index abbb898c65..5fdff37f2c 100644
--- a/hw/display/virtio-gpu-pci-rutabaga.c
+++ b/hw/display/virtio-gpu-pci-rutabaga.c
@@ -34,7 +34,7 @@ static const TypeInfo virtio_gpu_rutabaga_pci_info[] = {
         .parent = TYPE_VIRTIO_GPU_PCI_BASE,
         .instance_size = sizeof(VirtIOGPURutabagaPCI),
         .instance_init = virtio_gpu_rutabaga_initfn,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { INTERFACE_CONVENTIONAL_PCI_DEVICE },
             { },
         }
diff --git a/hw/display/virtio-gpu-pci.c b/hw/display/virtio-gpu-pci.c
index 6d789701a3..c0d71b6254 100644
--- a/hw/display/virtio-gpu-pci.c
+++ b/hw/display/virtio-gpu-pci.c
@@ -57,7 +57,7 @@ static void virtio_gpu_pci_base_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     }
 }
 
-static void virtio_gpu_pci_base_class_init(ObjectClass *klass, void *data)
+static void virtio_gpu_pci_base_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/display/virtio-gpu-rutabaga.c b/hw/display/virtio-gpu-rutabaga.c
index f6eb29472e..ed5ae52acb 100644
--- a/hw/display/virtio-gpu-rutabaga.c
+++ b/hw/display/virtio-gpu-rutabaga.c
@@ -1110,7 +1110,7 @@ static const Property virtio_gpu_rutabaga_properties[] = {
     DEFINE_PROP_STRING("wsi", VirtIOGPURutabaga, wsi),
 };
 
-static void virtio_gpu_rutabaga_class_init(ObjectClass *klass, void *data)
+static void virtio_gpu_rutabaga_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 11a7a85750..0a1a625b0e 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -1684,7 +1684,7 @@ static const Property virtio_gpu_properties[] = {
     DEFINE_PROP_UINT8("x-scanout-vmstate-version", VirtIOGPU, scanout_vmstate_version, 2),
 };
 
-static void virtio_gpu_class_init(ObjectClass *klass, void *data)
+static void virtio_gpu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/display/virtio-vga.c b/hw/display/virtio-vga.c
index fefbdb61e1..40e60f70fc 100644
--- a/hw/display/virtio-vga.c
+++ b/hw/display/virtio-vga.c
@@ -213,7 +213,7 @@ static const Property virtio_vga_base_properties[] = {
     DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy),
 };
 
-static void virtio_vga_base_class_init(ObjectClass *klass, void *data)
+static void virtio_vga_base_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/display/vmware_vga.c b/hw/display/vmware_vga.c
index 2dd661e3c1..544bb65320 100644
--- a/hw/display/vmware_vga.c
+++ b/hw/display/vmware_vga.c
@@ -1339,7 +1339,7 @@ static const Property vga_vmware_properties[] = {
                      chip.vga.global_vmstate, false),
 };
 
-static void vmsvga_class_init(ObjectClass *klass, void *data)
+static void vmsvga_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1363,7 +1363,7 @@ static const TypeInfo vmsvga_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(struct pci_vmsvga_state_s),
     .class_init    = vmsvga_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/display/xlnx_dp.c b/hw/display/xlnx_dp.c
index 1272da0133..7c980ee642 100644
--- a/hw/display/xlnx_dp.c
+++ b/hw/display/xlnx_dp.c
@@ -1391,7 +1391,7 @@ static const Property xlnx_dp_device_properties[] = {
     DEFINE_AUDIO_PROPERTIES(XlnxDPState, aud_card),
 };
 
-static void xlnx_dp_class_init(ObjectClass *oc, void *data)
+static void xlnx_dp_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/dma/bcm2835_dma.c b/hw/dma/bcm2835_dma.c
index 9b2fca2c7c..a2771ddcb5 100644
--- a/hw/dma/bcm2835_dma.c
+++ b/hw/dma/bcm2835_dma.c
@@ -385,7 +385,7 @@ static void bcm2835_dma_realize(DeviceState *dev, Error **errp)
     bcm2835_dma_reset(dev);
 }
 
-static void bcm2835_dma_class_init(ObjectClass *klass, void *data)
+static void bcm2835_dma_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/dma/i82374.c b/hw/dma/i82374.c
index 0bf69ef399..e226eda6d1 100644
--- a/hw/dma/i82374.c
+++ b/hw/dma/i82374.c
@@ -143,7 +143,7 @@ static const Property i82374_properties[] = {
     DEFINE_PROP_UINT32("iobase", I82374State, iobase, 0x400),
 };
 
-static void i82374_class_init(ObjectClass *klass, void *data)
+static void i82374_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     
diff --git a/hw/dma/i8257.c b/hw/dma/i8257.c
index 74c38d2ee8..2463952ada 100644
--- a/hw/dma/i8257.c
+++ b/hw/dma/i8257.c
@@ -592,7 +592,7 @@ static const Property i8257_properties[] = {
     DEFINE_PROP_INT32("dshift", I8257State, dshift, 0),
 };
 
-static void i8257_class_init(ObjectClass *klass, void *data)
+static void i8257_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IsaDmaClass *idc = ISADMA_CLASS(klass);
@@ -618,7 +618,7 @@ static const TypeInfo i8257_info = {
     .parent = TYPE_ISA_DEVICE,
     .instance_size = sizeof(I8257State),
     .class_init = i8257_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ISADMA },
         { }
     }
diff --git a/hw/dma/pl080.c b/hw/dma/pl080.c
index 8a9b073b24..277d934322 100644
--- a/hw/dma/pl080.c
+++ b/hw/dma/pl080.c
@@ -413,7 +413,7 @@ static const Property pl080_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void pl080_class_init(ObjectClass *oc, void *data)
+static void pl080_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/dma/pl330.c b/hw/dma/pl330.c
index 545aa44e45..a570bb08ec 100644
--- a/hw/dma/pl330.c
+++ b/hw/dma/pl330.c
@@ -1671,7 +1671,7 @@ static const Property pl330_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void pl330_class_init(ObjectClass *klass, void *data)
+static void pl330_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/dma/rc4030.c b/hw/dma/rc4030.c
index 6842e7d491..b6ed1d4643 100644
--- a/hw/dma/rc4030.c
+++ b/hw/dma/rc4030.c
@@ -701,7 +701,7 @@ static void rc4030_unrealize(DeviceState *dev)
     object_unparent(OBJECT(&s->dma_mr));
 }
 
-static void rc4030_class_init(ObjectClass *klass, void *class_data)
+static void rc4030_class_init(ObjectClass *klass, const void *class_data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -720,7 +720,7 @@ static const TypeInfo rc4030_info = {
 };
 
 static void rc4030_iommu_memory_region_class_init(ObjectClass *klass,
-                                                  void *data)
+                                                  const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/dma/sifive_pdma.c b/hw/dma/sifive_pdma.c
index a115af8d60..48de3a2478 100644
--- a/hw/dma/sifive_pdma.c
+++ b/hw/dma/sifive_pdma.c
@@ -464,7 +464,7 @@ static void sifive_pdma_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void sifive_pdma_class_init(ObjectClass *klass, void *data)
+static void sifive_pdma_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/dma/sparc32_dma.c b/hw/dma/sparc32_dma.c
index 280b747521..60c23b69e5 100644
--- a/hw/dma/sparc32_dma.c
+++ b/hw/dma/sparc32_dma.c
@@ -274,7 +274,7 @@ static void sparc32_dma_device_init(Object *obj)
     qdev_init_gpio_out(dev, s->gpio, 2);
 }
 
-static void sparc32_dma_device_class_init(ObjectClass *klass, void *data)
+static void sparc32_dma_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -316,7 +316,8 @@ static void sparc32_espdma_device_realize(DeviceState *dev, Error **errp)
     sysbus_realize(SYS_BUS_DEVICE(sysbus), &error_fatal);
 }
 
-static void sparc32_espdma_device_class_init(ObjectClass *klass, void *data)
+static void sparc32_espdma_device_class_init(ObjectClass *klass,
+                                             const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -351,7 +352,8 @@ static void sparc32_ledma_device_realize(DeviceState *dev, Error **errp)
     sysbus_realize(SYS_BUS_DEVICE(lance), &error_fatal);
 }
 
-static void sparc32_ledma_device_class_init(ObjectClass *klass, void *data)
+static void sparc32_ledma_device_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -426,7 +428,7 @@ static void sparc32_dma_init(Object *obj)
                             TYPE_SPARC32_LEDMA_DEVICE);
 }
 
-static void sparc32_dma_class_init(ObjectClass *klass, void *data)
+static void sparc32_dma_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/dma/xilinx_axidma.c b/hw/dma/xilinx_axidma.c
index 22fe35751a..2020399fd5 100644
--- a/hw/dma/xilinx_axidma.c
+++ b/hw/dma/xilinx_axidma.c
@@ -621,7 +621,7 @@ static const Property axidma_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void axidma_class_init(ObjectClass *klass, void *data)
+static void axidma_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -639,7 +639,8 @@ static StreamSinkClass xilinx_axidma_control_stream_class = {
     .push = xilinx_axidma_control_stream_push,
 };
 
-static void xilinx_axidma_stream_class_init(ObjectClass *klass, void *data)
+static void xilinx_axidma_stream_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     StreamSinkClass *ssc = STREAM_SINK_CLASS(klass);
 
@@ -661,7 +662,7 @@ static const TypeInfo xilinx_axidma_data_stream_info = {
     .instance_size = sizeof(XilinxAXIDMAStreamSink),
     .class_init    = xilinx_axidma_stream_class_init,
     .class_data    = &xilinx_axidma_data_stream_class,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_STREAM_SINK },
         { }
     }
@@ -673,7 +674,7 @@ static const TypeInfo xilinx_axidma_control_stream_info = {
     .instance_size = sizeof(XilinxAXIDMAStreamSink),
     .class_init    = xilinx_axidma_stream_class_init,
     .class_data    = &xilinx_axidma_control_stream_class,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_STREAM_SINK },
         { }
     }
diff --git a/hw/dma/xlnx-zdma.c b/hw/dma/xlnx-zdma.c
index bb27cb2e64..0c075e7d0d 100644
--- a/hw/dma/xlnx-zdma.c
+++ b/hw/dma/xlnx-zdma.c
@@ -816,7 +816,7 @@ static const Property zdma_props[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void zdma_class_init(ObjectClass *klass, void *data)
+static void zdma_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/dma/xlnx-zynq-devcfg.c b/hw/dma/xlnx-zynq-devcfg.c
index 0fd0d23f57..26845713ee 100644
--- a/hw/dma/xlnx-zynq-devcfg.c
+++ b/hw/dma/xlnx-zynq-devcfg.c
@@ -380,7 +380,7 @@ static void xlnx_zynq_devcfg_init(Object *obj)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void xlnx_zynq_devcfg_class_init(ObjectClass *klass, void *data)
+static void xlnx_zynq_devcfg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/dma/xlnx_csu_dma.c b/hw/dma/xlnx_csu_dma.c
index 1afaa0bf51..3db3904d83 100644
--- a/hw/dma/xlnx_csu_dma.c
+++ b/hw/dma/xlnx_csu_dma.c
@@ -712,7 +712,7 @@ static const Property xlnx_csu_dma_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void xlnx_csu_dma_class_init(ObjectClass *klass, void *data)
+static void xlnx_csu_dma_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     StreamSinkClass *ssc = STREAM_SINK_CLASS(klass);
@@ -744,7 +744,7 @@ static const TypeInfo xlnx_csu_dma_info = {
     .class_init    = xlnx_csu_dma_class_init,
     .class_size    = sizeof(XlnxCSUDMAClass),
     .instance_init = xlnx_csu_dma_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_STREAM_SINK },
         { }
     }
diff --git a/hw/dma/xlnx_dpdma.c b/hw/dma/xlnx_dpdma.c
index 2657808d37..3d88ccc8da 100644
--- a/hw/dma/xlnx_dpdma.c
+++ b/hw/dma/xlnx_dpdma.c
@@ -593,7 +593,7 @@ static void xlnx_dpdma_reset(DeviceState *dev)
     }
 }
 
-static void xlnx_dpdma_class_init(ObjectClass *oc, void *data)
+static void xlnx_dpdma_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/fsi/aspeed_apb2opb.c b/hw/fsi/aspeed_apb2opb.c
index 0e2cc143f1..172ba16b0c 100644
--- a/hw/fsi/aspeed_apb2opb.c
+++ b/hw/fsi/aspeed_apb2opb.c
@@ -320,7 +320,7 @@ static void fsi_aspeed_apb2opb_reset(DeviceState *dev)
     memcpy(s->regs, aspeed_apb2opb_reset, ASPEED_APB2OPB_NR_REGS);
 }
 
-static void fsi_aspeed_apb2opb_class_init(ObjectClass *klass, void *data)
+static void fsi_aspeed_apb2opb_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/fsi/cfam.c b/hw/fsi/cfam.c
index c62f0f78de..e2145c5934 100644
--- a/hw/fsi/cfam.c
+++ b/hw/fsi/cfam.c
@@ -145,7 +145,7 @@ static void fsi_cfam_realize(DeviceState *dev, Error **errp)
     memory_region_add_subregion(&cfam->lbus.mr, 0, &fsi_dev->iomem);
 }
 
-static void fsi_cfam_class_init(ObjectClass *klass, void *data)
+static void fsi_cfam_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->bus_type = TYPE_FSI_BUS;
diff --git a/hw/fsi/fsi-master.c b/hw/fsi/fsi-master.c
index 50fb1cd467..083a5507ab 100644
--- a/hw/fsi/fsi-master.c
+++ b/hw/fsi/fsi-master.c
@@ -144,7 +144,7 @@ static void fsi_master_reset(DeviceState *dev)
     s->regs[FSI_MVER] = 0xe0050101;
 }
 
-static void fsi_master_class_init(ObjectClass *klass, void *data)
+static void fsi_master_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/fsi/fsi.c b/hw/fsi/fsi.c
index 83ddb17ae6..6c52d5e745 100644
--- a/hw/fsi/fsi.c
+++ b/hw/fsi/fsi.c
@@ -76,7 +76,7 @@ static void fsi_slave_init(Object *o)
                           s, TYPE_FSI_SLAVE, 0x400);
 }
 
-static void fsi_slave_class_init(ObjectClass *klass, void *data)
+static void fsi_slave_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/fsi/lbus.c b/hw/fsi/lbus.c
index 4f87b28a22..8ec7f5fd78 100644
--- a/hw/fsi/lbus.c
+++ b/hw/fsi/lbus.c
@@ -91,7 +91,7 @@ static void fsi_scratchpad_reset(DeviceState *dev)
     memset(s->regs, 0, sizeof(s->regs));
 }
 
-static void fsi_scratchpad_class_init(ObjectClass *klass, void *data)
+static void fsi_scratchpad_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/gpio/aspeed_gpio.c b/hw/gpio/aspeed_gpio.c
index aedaf5238b..609a556908 100644
--- a/hw/gpio/aspeed_gpio.c
+++ b/hw/gpio/aspeed_gpio.c
@@ -1473,7 +1473,7 @@ static const VMStateDescription vmstate_aspeed_gpio = {
    }
 };
 
-static void aspeed_gpio_class_init(ObjectClass *klass, void *data)
+static void aspeed_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1483,7 +1483,7 @@ static void aspeed_gpio_class_init(ObjectClass *klass, void *data)
     dc->vmsd = &vmstate_aspeed_gpio;
 }
 
-static void aspeed_gpio_ast2400_class_init(ObjectClass *klass, void *data)
+static void aspeed_gpio_ast2400_class_init(ObjectClass *klass, const void *data)
 {
     AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);
 
@@ -1496,7 +1496,7 @@ static void aspeed_gpio_ast2400_class_init(ObjectClass *klass, void *data)
     agc->reg_ops = &aspeed_gpio_ops;
 }
 
-static void aspeed_gpio_2500_class_init(ObjectClass *klass, void *data)
+static void aspeed_gpio_2500_class_init(ObjectClass *klass, const void *data)
 {
     AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);
 
@@ -1509,7 +1509,8 @@ static void aspeed_gpio_2500_class_init(ObjectClass *klass, void *data)
     agc->reg_ops = &aspeed_gpio_ops;
 }
 
-static void aspeed_gpio_ast2600_3_3v_class_init(ObjectClass *klass, void *data)
+static void aspeed_gpio_ast2600_3_3v_class_init(ObjectClass *klass,
+                                                const void *data)
 {
     AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);
 
@@ -1522,7 +1523,8 @@ static void aspeed_gpio_ast2600_3_3v_class_init(ObjectClass *klass, void *data)
     agc->reg_ops = &aspeed_gpio_ops;
 }
 
-static void aspeed_gpio_ast2600_1_8v_class_init(ObjectClass *klass, void *data)
+static void aspeed_gpio_ast2600_1_8v_class_init(ObjectClass *klass,
+                                                const void *data)
 {
     AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);
 
@@ -1535,7 +1537,7 @@ static void aspeed_gpio_ast2600_1_8v_class_init(ObjectClass *klass, void *data)
     agc->reg_ops = &aspeed_gpio_ops;
 }
 
-static void aspeed_gpio_1030_class_init(ObjectClass *klass, void *data)
+static void aspeed_gpio_1030_class_init(ObjectClass *klass, const void *data)
 {
     AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);
 
@@ -1548,7 +1550,7 @@ static void aspeed_gpio_1030_class_init(ObjectClass *klass, void *data)
     agc->reg_ops = &aspeed_gpio_ops;
 }
 
-static void aspeed_gpio_2700_class_init(ObjectClass *klass, void *data)
+static void aspeed_gpio_2700_class_init(ObjectClass *klass, const void *data)
 {
     AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);
 
diff --git a/hw/gpio/bcm2835_gpio.c b/hw/gpio/bcm2835_gpio.c
index 5a5f1df5e8..dfb5d5cb57 100644
--- a/hw/gpio/bcm2835_gpio.c
+++ b/hw/gpio/bcm2835_gpio.c
@@ -319,7 +319,7 @@ static void bcm2835_gpio_realize(DeviceState *dev, Error **errp)
     s->sdbus_sdhost = SD_BUS(obj);
 }
 
-static void bcm2835_gpio_class_init(ObjectClass *klass, void *data)
+static void bcm2835_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/gpio/bcm2838_gpio.c b/hw/gpio/bcm2838_gpio.c
index 53be8f2d23..1069e7811b 100644
--- a/hw/gpio/bcm2838_gpio.c
+++ b/hw/gpio/bcm2838_gpio.c
@@ -364,7 +364,7 @@ static void bcm2838_gpio_realize(DeviceState *dev, Error **errp)
     s->sdbus_sdhost = SD_BUS(obj);
 }
 
-static void bcm2838_gpio_class_init(ObjectClass *klass, void *data)
+static void bcm2838_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/gpio/gpio_key.c b/hw/gpio/gpio_key.c
index 2fcab9ead6..40c028bed9 100644
--- a/hw/gpio/gpio_key.c
+++ b/hw/gpio/gpio_key.c
@@ -85,7 +85,7 @@ static void gpio_key_realize(DeviceState *dev, Error **errp)
     s->timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, gpio_key_timer_expired, s);
 }
 
-static void gpio_key_class_init(ObjectClass *klass, void *data)
+static void gpio_key_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/gpio/imx_gpio.c b/hw/gpio/imx_gpio.c
index 8c8299c4c4..f23c52af26 100644
--- a/hw/gpio/imx_gpio.c
+++ b/hw/gpio/imx_gpio.c
@@ -321,7 +321,7 @@ static void imx_gpio_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
 }
 
-static void imx_gpio_class_init(ObjectClass *klass, void *data)
+static void imx_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/gpio/mpc8xxx.c b/hw/gpio/mpc8xxx.c
index a3c1d2fbf4..257497af58 100644
--- a/hw/gpio/mpc8xxx.c
+++ b/hw/gpio/mpc8xxx.c
@@ -199,7 +199,7 @@ static void mpc8xxx_gpio_initfn(Object *obj)
     qdev_init_gpio_out(dev, s->out, 32);
 }
 
-static void mpc8xxx_gpio_class_init(ObjectClass *klass, void *data)
+static void mpc8xxx_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/gpio/npcm7xx_gpio.c b/hw/gpio/npcm7xx_gpio.c
index 2916056fae..66f8256a7a 100644
--- a/hw/gpio/npcm7xx_gpio.c
+++ b/hw/gpio/npcm7xx_gpio.c
@@ -396,7 +396,7 @@ static const Property npcm7xx_gpio_properties[] = {
     DEFINE_PROP_UINT32("reset-odsc", NPCM7xxGPIOState, reset_odsc, 0),
 };
 
-static void npcm7xx_gpio_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_gpio_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *reset = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/gpio/nrf51_gpio.c b/hw/gpio/nrf51_gpio.c
index d08c254e36..d94c0c47da 100644
--- a/hw/gpio/nrf51_gpio.c
+++ b/hw/gpio/nrf51_gpio.c
@@ -304,7 +304,7 @@ static void nrf51_gpio_init(Object *obj)
     qdev_init_gpio_out_named(DEVICE(s), &s->detect, "detect", 1);
 }
 
-static void nrf51_gpio_class_init(ObjectClass *klass, void *data)
+static void nrf51_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/gpio/omap_gpio.c b/hw/gpio/omap_gpio.c
index 8a9f14ba15..61ea7862af 100644
--- a/hw/gpio/omap_gpio.c
+++ b/hw/gpio/omap_gpio.c
@@ -229,7 +229,7 @@ static const Property omap_gpio_properties[] = {
     DEFINE_PROP_INT32("mpu_model", Omap1GpioState, mpu_model, 0),
 };
 
-static void omap_gpio_class_init(ObjectClass *klass, void *data)
+static void omap_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/gpio/pca9552.c b/hw/gpio/pca9552.c
index 1ac0cf6c46..d65c0a2e90 100644
--- a/hw/gpio/pca9552.c
+++ b/hw/gpio/pca9552.c
@@ -432,7 +432,7 @@ static const Property pca955x_properties[] = {
     DEFINE_PROP_STRING("description", PCA955xState, description),
 };
 
-static void pca955x_class_init(ObjectClass *klass, void *data)
+static void pca955x_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
@@ -454,7 +454,7 @@ static const TypeInfo pca955x_info = {
     .abstract      = true,
 };
 
-static void pca9552_class_init(ObjectClass *oc, void *data)
+static void pca9552_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCA955xClass *pc = PCA955X_CLASS(oc);
diff --git a/hw/gpio/pca9554.c b/hw/gpio/pca9554.c
index 7301fce934..de3f883aee 100644
--- a/hw/gpio/pca9554.c
+++ b/hw/gpio/pca9554.c
@@ -292,7 +292,7 @@ static const Property pca9554_properties[] = {
     DEFINE_PROP_STRING("description", PCA9554State, description),
 };
 
-static void pca9554_class_init(ObjectClass *klass, void *data)
+static void pca9554_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
diff --git a/hw/gpio/pcf8574.c b/hw/gpio/pcf8574.c
index 208efe69ea..274b44bb61 100644
--- a/hw/gpio/pcf8574.c
+++ b/hw/gpio/pcf8574.c
@@ -138,7 +138,7 @@ static void pcf8574_realize(DeviceState *dev, Error **errp)
     qdev_init_gpio_out_named(dev, &s->intrq, "nINT", 1);
 }
 
-static void pcf8574_class_init(ObjectClass *klass, void *data)
+static void pcf8574_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass   *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k  = I2C_SLAVE_CLASS(klass);
diff --git a/hw/gpio/pl061.c b/hw/gpio/pl061.c
index 2e69785f2a..1acca3f2f8 100644
--- a/hw/gpio/pl061.c
+++ b/hw/gpio/pl061.c
@@ -566,7 +566,7 @@ static const Property pl061_props[] = {
     DEFINE_PROP_UINT32("pulldowns", PL061State, pulldowns, 0x0),
 };
 
-static void pl061_class_init(ObjectClass *klass, void *data)
+static void pl061_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/gpio/sifive_gpio.c b/hw/gpio/sifive_gpio.c
index 0d5206ae6b..5831647b4d 100644
--- a/hw/gpio/sifive_gpio.c
+++ b/hw/gpio/sifive_gpio.c
@@ -370,7 +370,7 @@ static void sifive_gpio_realize(DeviceState *dev, Error **errp)
     qdev_init_gpio_out(DEVICE(s), s->output, s->ngpio);
 }
 
-static void sifive_gpio_class_init(ObjectClass *klass, void *data)
+static void sifive_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/gpio/stm32l4x5_gpio.c b/hw/gpio/stm32l4x5_gpio.c
index f69fc1db4f..414ce83039 100644
--- a/hw/gpio/stm32l4x5_gpio.c
+++ b/hw/gpio/stm32l4x5_gpio.c
@@ -454,7 +454,7 @@ static const Property stm32l4x5_gpio_properties[] = {
     DEFINE_PROP_UINT32("pupd-reset", Stm32l4x5GpioState, pupdr_reset, 0),
 };
 
-static void stm32l4x5_gpio_class_init(ObjectClass *klass, void *data)
+static void stm32l4x5_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/gpio/zaurus.c b/hw/gpio/zaurus.c
index 7342440b95..b8d27f5973 100644
--- a/hw/gpio/zaurus.c
+++ b/hw/gpio/zaurus.c
@@ -243,7 +243,7 @@ static const VMStateDescription vmstate_scoop_regs = {
     },
 };
 
-static void scoop_sysbus_class_init(ObjectClass *klass, void *data)
+static void scoop_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index c430bf28dd..dacedc5409 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -683,7 +683,7 @@ static void hppa_nmi(NMIState *n, int cpu_index, Error **errp)
     }
 }
 
-static void HP_B160L_machine_init_class_init(ObjectClass *oc, void *data)
+static void HP_B160L_machine_init_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         TYPE_HPPA_CPU,
@@ -713,13 +713,13 @@ static const TypeInfo HP_B160L_machine_init_typeinfo = {
     .name = MACHINE_TYPE_NAME("B160L"),
     .parent = TYPE_MACHINE,
     .class_init = HP_B160L_machine_init_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_NMI },
         { }
     },
 };
 
-static void HP_C3700_machine_init_class_init(ObjectClass *oc, void *data)
+static void HP_C3700_machine_init_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         TYPE_HPPA64_CPU,
@@ -749,7 +749,7 @@ static const TypeInfo HP_C3700_machine_init_typeinfo = {
     .name = MACHINE_TYPE_NAME("C3700"),
     .parent = TYPE_MACHINE,
     .class_init = HP_C3700_machine_init_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_NMI },
         { }
     },
diff --git a/hw/hyperv/hv-balloon.c b/hw/hyperv/hv-balloon.c
index acabff2c4a..94b0abbd68 100644
--- a/hw/hyperv/hv-balloon.c
+++ b/hw/hyperv/hv-balloon.c
@@ -1743,7 +1743,7 @@ static const Property hv_balloon_properties[] = {
     DEFINE_PROP_UINT64(HV_BALLOON_ADDR_PROP, HvBalloon, addr, 0),
 };
 
-static void hv_balloon_class_init(ObjectClass *klass, void *data)
+static void hv_balloon_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VMBusDeviceClass *vdc = VMBUS_DEVICE_CLASS(klass);
diff --git a/hw/hyperv/hyperv.c b/hw/hyperv/hyperv.c
index 8f193fd0bd..0271cfd271 100644
--- a/hw/hyperv/hyperv.c
+++ b/hw/hyperv/hyperv.c
@@ -133,7 +133,7 @@ static void synic_reset(DeviceState *dev)
     assert(QLIST_EMPTY(&synic->sint_routes));
 }
 
-static void synic_class_init(ObjectClass *klass, void *data)
+static void synic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/hyperv/hyperv_testdev.c b/hw/hyperv/hyperv_testdev.c
index a630ca7047..2d4a63693b 100644
--- a/hw/hyperv/hyperv_testdev.c
+++ b/hw/hyperv/hyperv_testdev.c
@@ -303,7 +303,7 @@ static void hv_test_dev_realizefn(DeviceState *d, Error **errp)
     memory_region_add_subregion(io, 0x3000, &dev->sint_control);
 }
 
-static void hv_test_dev_class_init(ObjectClass *klass, void *data)
+static void hv_test_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/hyperv/syndbg.c b/hw/hyperv/syndbg.c
index a410b55b9a..ca291826a0 100644
--- a/hw/hyperv/syndbg.c
+++ b/hw/hyperv/syndbg.c
@@ -373,7 +373,7 @@ static const Property hv_syndbg_properties[] = {
     DEFINE_PROP_BOOL("use_hcalls", HvSynDbg, use_hcalls, false),
 };
 
-static void hv_syndbg_class_init(ObjectClass *klass, void *data)
+static void hv_syndbg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/hyperv/vmbus.c b/hw/hyperv/vmbus.c
index 98ea968e51..b147ea06d8 100644
--- a/hw/hyperv/vmbus.c
+++ b/hw/hyperv/vmbus.c
@@ -2351,7 +2351,7 @@ static const Property vmbus_dev_props[] = {
 };
 
 
-static void vmbus_dev_class_init(ObjectClass *klass, void *data)
+static void vmbus_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *kdev = DEVICE_CLASS(klass);
     device_class_set_props(kdev, vmbus_dev_props);
@@ -2469,7 +2469,7 @@ static char *vmbus_get_fw_dev_path(DeviceState *dev)
     return g_strdup_printf("%s@%s", qdev_fw_name(dev), uuid);
 }
 
-static void vmbus_class_init(ObjectClass *klass, void *data)
+static void vmbus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -2656,7 +2656,7 @@ static const Property vmbus_bridge_props[] = {
     DEFINE_PROP_UINT8("irq", VMBusBridge, irq, 7),
 };
 
-static void vmbus_bridge_class_init(ObjectClass *klass, void *data)
+static void vmbus_bridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     SysBusDeviceClass *sk = SYS_BUS_DEVICE_CLASS(klass);
diff --git a/hw/i2c/allwinner-i2c.c b/hw/i2c/allwinner-i2c.c
index 66d6431c50..fe887e1c6a 100644
--- a/hw/i2c/allwinner-i2c.c
+++ b/hw/i2c/allwinner-i2c.c
@@ -438,7 +438,7 @@ static void allwinner_i2c_realize(DeviceState *dev, Error **errp)
     s->bus = i2c_init_bus(dev, "i2c");
 }
 
-static void allwinner_i2c_class_init(ObjectClass *klass, void *data)
+static void allwinner_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c
index a8fbb9f44a..83fb906bdc 100644
--- a/hw/i2c/aspeed_i2c.c
+++ b/hw/i2c/aspeed_i2c.c
@@ -1263,7 +1263,7 @@ static const Property aspeed_i2c_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void aspeed_i2c_class_init(ObjectClass *klass, void *data)
+static void aspeed_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1390,7 +1390,8 @@ static void aspeed_i2c_bus_slave_send_async(I2CSlave *slave, uint8_t data)
     aspeed_i2c_bus_raise_interrupt(bus);
 }
 
-static void aspeed_i2c_bus_slave_class_init(ObjectClass *klass, void *data)
+static void aspeed_i2c_bus_slave_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
@@ -1451,7 +1452,7 @@ static const Property aspeed_i2c_bus_properties[] = {
                      AspeedI2CState *),
 };
 
-static void aspeed_i2c_bus_class_init(ObjectClass *klass, void *data)
+static void aspeed_i2c_bus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1483,7 +1484,7 @@ static uint8_t *aspeed_2400_i2c_bus_pool_base(AspeedI2CBus *bus)
     return &pool_page[ARRAY_FIELD_EX32(bus->regs, I2CD_POOL_CTRL, OFFSET)];
 }
 
-static void aspeed_2400_i2c_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
@@ -1517,7 +1518,7 @@ static uint8_t *aspeed_2500_i2c_bus_pool_base(AspeedI2CBus *bus)
     return bus->pool;
 }
 
-static void aspeed_2500_i2c_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
@@ -1547,7 +1548,7 @@ static qemu_irq aspeed_2600_i2c_bus_get_irq(AspeedI2CBus *bus)
     return bus->irq;
 }
 
-static void aspeed_2600_i2c_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
@@ -1571,7 +1572,7 @@ static const TypeInfo aspeed_2600_i2c_info = {
     .class_init = aspeed_2600_i2c_class_init,
 };
 
-static void aspeed_1030_i2c_class_init(ObjectClass *klass, void *data)
+static void aspeed_1030_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
@@ -1595,7 +1596,7 @@ static const TypeInfo aspeed_1030_i2c_info = {
     .class_init = aspeed_1030_i2c_class_init,
 };
 
-static void aspeed_2700_i2c_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
diff --git a/hw/i2c/bcm2835_i2c.c b/hw/i2c/bcm2835_i2c.c
index 67bfdef3b4..be11cca2a9 100644
--- a/hw/i2c/bcm2835_i2c.c
+++ b/hw/i2c/bcm2835_i2c.c
@@ -258,7 +258,7 @@ static const VMStateDescription vmstate_bcm2835_i2c = {
     }
 };
 
-static void bcm2835_i2c_class_init(ObjectClass *klass, void *data)
+static void bcm2835_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i2c/bitbang_i2c.c b/hw/i2c/bitbang_i2c.c
index de5f5aacf5..e020f314e2 100644
--- a/hw/i2c/bitbang_i2c.c
+++ b/hw/i2c/bitbang_i2c.c
@@ -222,7 +222,7 @@ static void gpio_i2c_init(Object *obj)
     qdev_init_gpio_out(dev, &s->out, 1);
 }
 
-static void gpio_i2c_class_init(ObjectClass *klass, void *data)
+static void gpio_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i2c/core.c b/hw/i2c/core.c
index 26bb18514a..4b6345b588 100644
--- a/hw/i2c/core.c
+++ b/hw/i2c/core.c
@@ -401,7 +401,7 @@ static bool i2c_slave_match(I2CSlave *candidate, uint8_t address,
     return false;
 }
 
-static void i2c_slave_class_init(ObjectClass *klass, void *data)
+static void i2c_slave_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
diff --git a/hw/i2c/exynos4210_i2c.c b/hw/i2c/exynos4210_i2c.c
index b1d00096ee..9d0c1cdaa8 100644
--- a/hw/i2c/exynos4210_i2c.c
+++ b/hw/i2c/exynos4210_i2c.c
@@ -309,7 +309,7 @@ static void exynos4210_i2c_init(Object *obj)
     s->bus = i2c_init_bus(dev, "i2c");
 }
 
-static void exynos4210_i2c_class_init(ObjectClass *klass, void *data)
+static void exynos4210_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i2c/i2c_mux_pca954x.c b/hw/i2c/i2c_mux_pca954x.c
index 779cc4e66e..a8ef640cd2 100644
--- a/hw/i2c/i2c_mux_pca954x.c
+++ b/hw/i2c/i2c_mux_pca954x.c
@@ -172,13 +172,13 @@ I2CBus *pca954x_i2c_get_bus(I2CSlave *mux, uint8_t channel)
     return pca954x->bus[channel];
 }
 
-static void pca9546_class_init(ObjectClass *klass, void *data)
+static void pca9546_class_init(ObjectClass *klass, const void *data)
 {
     Pca954xClass *s = PCA954X_CLASS(klass);
     s->nchans = PCA9546_CHANNEL_COUNT;
 }
 
-static void pca9548_class_init(ObjectClass *klass, void *data)
+static void pca9548_class_init(ObjectClass *klass, const void *data)
 {
     Pca954xClass *s = PCA954X_CLASS(klass);
     s->nchans = PCA9548_CHANNEL_COUNT;
@@ -215,7 +215,7 @@ static const Property pca954x_props[] = {
     DEFINE_PROP_STRING("name", Pca954xState, name),
 };
 
-static void pca954x_class_init(ObjectClass *klass, void *data)
+static void pca954x_class_init(ObjectClass *klass, const void *data)
 {
     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/i2c/imx_i2c.c b/hw/i2c/imx_i2c.c
index d62213b9e0..91f84c2ad7 100644
--- a/hw/i2c/imx_i2c.c
+++ b/hw/i2c/imx_i2c.c
@@ -297,7 +297,7 @@ static void imx_i2c_realize(DeviceState *dev, Error **errp)
     s->bus = i2c_init_bus(dev, NULL);
 }
 
-static void imx_i2c_class_init(ObjectClass *klass, void *data)
+static void imx_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i2c/microbit_i2c.c b/hw/i2c/microbit_i2c.c
index 06fbd18a78..2291d6370e 100644
--- a/hw/i2c/microbit_i2c.c
+++ b/hw/i2c/microbit_i2c.c
@@ -105,7 +105,7 @@ static void microbit_i2c_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void microbit_i2c_class_init(ObjectClass *klass, void *data)
+static void microbit_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i2c/mpc_i2c.c b/hw/i2c/mpc_i2c.c
index 913d044ac1..25f91b7bc8 100644
--- a/hw/i2c/mpc_i2c.c
+++ b/hw/i2c/mpc_i2c.c
@@ -334,7 +334,7 @@ static void mpc_i2c_realize(DeviceState *dev, Error **errp)
     i2c->bus = i2c_init_bus(dev, "i2c");
 }
 
-static void mpc_i2c_class_init(ObjectClass *klass, void *data)
+static void mpc_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i2c/npcm7xx_smbus.c b/hw/i2c/npcm7xx_smbus.c
index 22d68fc67d..179852a4fd 100644
--- a/hw/i2c/npcm7xx_smbus.c
+++ b/hw/i2c/npcm7xx_smbus.c
@@ -1075,7 +1075,7 @@ static const VMStateDescription vmstate_npcm7xx_smbus = {
     },
 };
 
-static void npcm7xx_smbus_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_smbus_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/i2c/omap_i2c.c b/hw/i2c/omap_i2c.c
index a641db2348..2e45266e74 100644
--- a/hw/i2c/omap_i2c.c
+++ b/hw/i2c/omap_i2c.c
@@ -515,7 +515,7 @@ static const Property omap_i2c_properties[] = {
     DEFINE_PROP_UINT8("revision", OMAPI2CState, revision, 0),
 };
 
-static void omap_i2c_class_init(ObjectClass *klass, void *data)
+static void omap_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c
index ba1d2fd716..853dc4b434 100644
--- a/hw/i2c/pmbus_device.c
+++ b/hw/i2c/pmbus_device.c
@@ -1902,7 +1902,7 @@ static void pmbus_device_finalize(Object *obj)
     g_free(pmdev->pages);
 }
 
-static void pmbus_device_class_init(ObjectClass *klass, void *data)
+static void pmbus_device_class_init(ObjectClass *klass, const void *data)
 {
     SMBusDeviceClass *k = SMBUS_DEVICE_CLASS(klass);
 
diff --git a/hw/i2c/ppc4xx_i2c.c b/hw/i2c/ppc4xx_i2c.c
index 7b124a7e33..09d4c49d65 100644
--- a/hw/i2c/ppc4xx_i2c.c
+++ b/hw/i2c/ppc4xx_i2c.c
@@ -354,7 +354,7 @@ static void ppc4xx_i2c_init(Object *o)
     bitbang_i2c_init(&s->bitbang, s->bus);
 }
 
-static void ppc4xx_i2c_class_init(ObjectClass *klass, void *data)
+static void ppc4xx_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i2c/smbus_eeprom.c b/hw/i2c/smbus_eeprom.c
index e3e96d4a2d..0a1088fbb0 100644
--- a/hw/i2c/smbus_eeprom.c
+++ b/hw/i2c/smbus_eeprom.c
@@ -137,7 +137,7 @@ static void smbus_eeprom_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void smbus_eeprom_class_initfn(ObjectClass *klass, void *data)
+static void smbus_eeprom_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SMBusDeviceClass *sc = SMBUS_DEVICE_CLASS(klass);
diff --git a/hw/i2c/smbus_ich9.c b/hw/i2c/smbus_ich9.c
index 208f263ac5..956c9b59bb 100644
--- a/hw/i2c/smbus_ich9.c
+++ b/hw/i2c/smbus_ich9.c
@@ -118,7 +118,7 @@ static void build_ich9_smb_aml(AcpiDevAmlIf *adev, Aml *scope)
     qbus_build_aml(bus, scope);
 }
 
-static void ich9_smb_class_init(ObjectClass *klass, void *data)
+static void ich9_smb_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -145,7 +145,7 @@ static const TypeInfo ich9_smb_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(ICH9SMBState),
     .class_init = ich9_smb_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { TYPE_ACPI_DEV_AML_IF },
         { },
diff --git a/hw/i2c/smbus_slave.c b/hw/i2c/smbus_slave.c
index 9f9afc25a4..cfb61c879e 100644
--- a/hw/i2c/smbus_slave.c
+++ b/hw/i2c/smbus_slave.c
@@ -201,7 +201,7 @@ static int smbus_i2c_send(I2CSlave *s, uint8_t data)
     return 0;
 }
 
-static void smbus_device_class_init(ObjectClass *klass, void *data)
+static void smbus_device_class_init(ObjectClass *klass, const void *data)
 {
     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
 
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index 5f9b952799..2cf7e24a21 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -1677,7 +1677,7 @@ static void amdvi_sysbus_instance_init(Object *klass)
     object_initialize(&s->pci, sizeof(s->pci), TYPE_AMD_IOMMU_PCI);
 }
 
-static void amdvi_sysbus_class_init(ObjectClass *klass, void *data)
+static void amdvi_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     X86IOMMUClass *dc_class = X86_IOMMU_DEVICE_CLASS(klass);
@@ -1700,7 +1700,7 @@ static const TypeInfo amdvi_sysbus = {
     .class_init = amdvi_sysbus_class_init
 };
 
-static void amdvi_pci_class_init(ObjectClass *klass, void *data)
+static void amdvi_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1719,13 +1719,14 @@ static const TypeInfo amdvi_pci = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(AMDVIPCIState),
     .class_init = amdvi_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-static void amdvi_iommu_memory_region_class_init(ObjectClass *klass, void *data)
+static void amdvi_iommu_memory_region_class_init(ObjectClass *klass,
+                                                 const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 0608aec8c5..5f8ed1243d 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -4859,7 +4859,7 @@ static void vtd_realize(DeviceState *dev, Error **errp)
     qemu_add_machine_init_done_notifier(&vtd_machine_done_notify);
 }
 
-static void vtd_class_init(ObjectClass *klass, void *data)
+static void vtd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     X86IOMMUClass *x86_class = X86_IOMMU_DEVICE_CLASS(klass);
@@ -4887,7 +4887,7 @@ static const TypeInfo vtd_info = {
 };
 
 static void vtd_iommu_memory_region_class_init(ObjectClass *klass,
-                                                     void *data)
+                                               const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/i386/kvm/apic.c b/hw/i386/kvm/apic.c
index 7575106000..39035db042 100644
--- a/hw/i386/kvm/apic.c
+++ b/hw/i386/kvm/apic.c
@@ -240,7 +240,7 @@ static void kvm_apic_unrealize(DeviceState *dev)
 {
 }
 
-static void kvm_apic_class_init(ObjectClass *klass, void *data)
+static void kvm_apic_class_init(ObjectClass *klass, const void *data)
 {
     APICCommonClass *k = APIC_COMMON_CLASS(klass);
 
diff --git a/hw/i386/kvm/clock.c b/hw/i386/kvm/clock.c
index 17443552e9..f56382717f 100644
--- a/hw/i386/kvm/clock.c
+++ b/hw/i386/kvm/clock.c
@@ -309,7 +309,7 @@ static const Property kvmclock_properties[] = {
                       mach_use_reliable_get_clock, true),
 };
 
-static void kvmclock_class_init(ObjectClass *klass, void *data)
+static void kvmclock_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/kvm/i8254.c b/hw/i386/kvm/i8254.c
index 3b92771c79..14b78f30a8 100644
--- a/hw/i386/kvm/i8254.c
+++ b/hw/i386/kvm/i8254.c
@@ -292,7 +292,7 @@ static const Property kvm_pit_properties[] = {
                                lost_tick_policy, LOST_TICK_POLICY_DELAY),
 };
 
-static void kvm_pit_class_init(ObjectClass *klass, void *data)
+static void kvm_pit_class_init(ObjectClass *klass, const void *data)
 {
     KVMPITClass *kpc = KVM_PIT_CLASS(klass);
     PITCommonClass *k = PIT_COMMON_CLASS(klass);
diff --git a/hw/i386/kvm/i8259.c b/hw/i386/kvm/i8259.c
index 272c04df0b..8a72d6e4dd 100644
--- a/hw/i386/kvm/i8259.c
+++ b/hw/i386/kvm/i8259.c
@@ -139,7 +139,7 @@ qemu_irq *kvm_i8259_init(ISABus *bus)
     return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS);
 }
 
-static void kvm_i8259_class_init(ObjectClass *klass, void *data)
+static void kvm_i8259_class_init(ObjectClass *klass, const void *data)
 {
     KVMPICClass *kpc = KVM_PIC_CLASS(klass);
     PICCommonClass *k = PIC_COMMON_CLASS(klass);
diff --git a/hw/i386/kvm/ioapic.c b/hw/i386/kvm/ioapic.c
index 5419e191b5..693ee978a1 100644
--- a/hw/i386/kvm/ioapic.c
+++ b/hw/i386/kvm/ioapic.c
@@ -137,7 +137,7 @@ static const Property kvm_ioapic_properties[] = {
     DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0),
 };
 
-static void kvm_ioapic_class_init(ObjectClass *klass, void *data)
+static void kvm_ioapic_class_init(ObjectClass *klass, const void *data)
 {
     IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index f9223ef1a1..b5190549a8 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -271,7 +271,7 @@ static const VMStateDescription xen_evtchn_vmstate = {
     }
 };
 
-static void xen_evtchn_class_init(ObjectClass *klass, void *data)
+static void xen_evtchn_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/kvm/xen_gnttab.c b/hw/i386/kvm/xen_gnttab.c
index 430ba62896..4b9e272c5e 100644
--- a/hw/i386/kvm/xen_gnttab.c
+++ b/hw/i386/kvm/xen_gnttab.c
@@ -135,7 +135,7 @@ static const VMStateDescription xen_gnttab_vmstate = {
     }
 };
 
-static void xen_gnttab_class_init(ObjectClass *klass, void *data)
+static void xen_gnttab_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/kvm/xen_overlay.c b/hw/i386/kvm/xen_overlay.c
index a2b26e9906..3cb7361937 100644
--- a/hw/i386/kvm/xen_overlay.c
+++ b/hw/i386/kvm/xen_overlay.c
@@ -151,7 +151,7 @@ static void xen_overlay_reset(DeviceState *dev)
     kvm_xen_soft_reset();
 }
 
-static void xen_overlay_class_init(ObjectClass *klass, void *data)
+static void xen_overlay_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/kvm/xen_primary_console.c b/hw/i386/kvm/xen_primary_console.c
index 8ad2363d18..6e9d6417c3 100644
--- a/hw/i386/kvm/xen_primary_console.c
+++ b/hw/i386/kvm/xen_primary_console.c
@@ -67,7 +67,7 @@ static void xen_primary_console_realize(DeviceState *dev, Error **errp)
     xen_primary_console_singleton = s;
 }
 
-static void xen_primary_console_class_init(ObjectClass *klass, void *data)
+static void xen_primary_console_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c
index 227ad7ace3..42955cccd9 100644
--- a/hw/i386/kvm/xen_xenstore.c
+++ b/hw/i386/kvm/xen_xenstore.c
@@ -259,7 +259,7 @@ static const VMStateDescription xen_xenstore_vmstate = {
     }
 };
 
-static void xen_xenstore_class_init(ObjectClass *klass, void *data)
+static void xen_xenstore_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
index d0a236c74f..e0daf0d4fc 100644
--- a/hw/i386/microvm.c
+++ b/hw/i386/microvm.c
@@ -635,7 +635,7 @@ GlobalProperty microvm_properties[] = {
     { "pcie-root-port", "io-reserve", "0" },
 };
 
-static void microvm_class_init(ObjectClass *oc, void *data)
+static void microvm_class_init(ObjectClass *oc, const void *data)
 {
     X86MachineClass *x86mc = X86_MACHINE_CLASS(oc);
     MicrovmMachineClass *mmc = MICROVM_MACHINE_CLASS(oc);
@@ -726,7 +726,7 @@ static const TypeInfo microvm_machine_info = {
     .instance_init = microvm_machine_initfn,
     .class_size    = sizeof(MicrovmMachineClass),
     .class_init    = microvm_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
          { TYPE_HOTPLUG_HANDLER },
          { }
     },
diff --git a/hw/i386/nitro_enclave.c b/hw/i386/nitro_enclave.c
index 4b69f265cc..5ee50f3b85 100644
--- a/hw/i386/nitro_enclave.c
+++ b/hw/i386/nitro_enclave.c
@@ -293,7 +293,7 @@ static void nitro_enclave_set_parent_id(Object *obj, const char *value,
     nems->parent_id = g_strdup(value);
 }
 
-static void nitro_enclave_class_init(ObjectClass *oc, void *data)
+static void nitro_enclave_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     MicrovmMachineClass *mmc = MICROVM_MACHINE_CLASS(oc);
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 5481fe40be..70656157ca 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1766,7 +1766,7 @@ static bool pc_hotplug_allowed(MachineState *ms, DeviceState *dev, Error **errp)
     return true;
 }
 
-static void pc_machine_class_init(ObjectClass *oc, void *data)
+static void pc_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     X86MachineClass *x86mc = X86_MACHINE_CLASS(oc);
@@ -1870,7 +1870,7 @@ static const TypeInfo pc_machine_info = {
     .instance_init = pc_machine_initfn,
     .class_size = sizeof(PCMachineClass),
     .class_init = pc_machine_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
          { TYPE_HOTPLUG_HANDLER },
          { }
     },
diff --git a/hw/i386/port92.c b/hw/i386/port92.c
index 1ba3f32887..39b6f3178f 100644
--- a/hw/i386/port92.c
+++ b/hw/i386/port92.c
@@ -97,7 +97,7 @@ static void port92_realizefn(DeviceState *dev, Error **errp)
     isa_register_ioport(isadev, &s->io, 0x92);
 }
 
-static void port92_class_initfn(ObjectClass *klass, void *data)
+static void port92_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/sgx-epc.c b/hw/i386/sgx-epc.c
index 00b220d4d6..2b3b2823b5 100644
--- a/hw/i386/sgx-epc.c
+++ b/hw/i386/sgx-epc.c
@@ -147,7 +147,7 @@ static void sgx_epc_md_fill_device_info(const MemoryDeviceState *md,
     info->type = MEMORY_DEVICE_INFO_KIND_SGX_EPC;
 }
 
-static void sgx_epc_class_init(ObjectClass *oc, void *data)
+static void sgx_epc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
@@ -173,7 +173,7 @@ static const TypeInfo sgx_epc_info = {
     .instance_init = sgx_epc_init,
     .class_init    = sgx_epc_class_init,
     .class_size    = sizeof(DeviceClass),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_MEMORY_DEVICE },
         { }
     },
diff --git a/hw/i386/vapic.c b/hw/i386/vapic.c
index 347431eeef..0c1c92c479 100644
--- a/hw/i386/vapic.c
+++ b/hw/i386/vapic.c
@@ -847,7 +847,7 @@ static const VMStateDescription vmstate_vapic = {
     }
 };
 
-static void vapic_class_init(ObjectClass *klass, void *data)
+static void vapic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/vmmouse.c b/hw/i386/vmmouse.c
index 3e07d12512..3896159b05 100644
--- a/hw/i386/vmmouse.c
+++ b/hw/i386/vmmouse.c
@@ -321,7 +321,7 @@ static const Property vmmouse_properties[] = {
     DEFINE_PROP_LINK("i8042", VMMouseState, i8042, TYPE_I8042, ISAKBDState *),
 };
 
-static void vmmouse_class_initfn(ObjectClass *klass, void *data)
+static void vmmouse_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/vmport.c b/hw/i386/vmport.c
index 2f19b970b5..6d93457c52 100644
--- a/hw/i386/vmport.c
+++ b/hw/i386/vmport.c
@@ -286,7 +286,7 @@ static const Property vmport_properties[] = {
     DEFINE_PROP_UINT8("vmware-vmx-type", VMPortState, vmware_vmx_type, 2),
 };
 
-static void vmport_class_initfn(ObjectClass *klass, void *data)
+static void vmport_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index 5cdd165af0..d34a6849f4 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -132,7 +132,7 @@ static const Property x86_iommu_properties[] = {
     DEFINE_PROP_BOOL("pt", X86IOMMUState, pt_supported, true),
 };
 
-static void x86_iommu_class_init(ObjectClass *klass, void *data)
+static void x86_iommu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = x86_iommu_realize;
diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index 69bfc00b9a..e2d0409299 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -372,7 +372,7 @@ static void x86_machine_initfn(Object *obj)
     x86ms->above_4g_mem_start = 4 * GiB;
 }
 
-static void x86_machine_class_init(ObjectClass *oc, void *data)
+static void x86_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     X86MachineClass *x86mc = X86_MACHINE_CLASS(oc);
@@ -450,7 +450,7 @@ static const TypeInfo x86_machine_info = {
     .instance_init = x86_machine_initfn,
     .class_size = sizeof(X86MachineClass),
     .class_init = x86_machine_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
          { TYPE_NMI },
          { }
     },
diff --git a/hw/i386/xen/xen-pvh.c b/hw/i386/xen/xen-pvh.c
index f6356f2a7e..067f73e977 100644
--- a/hw/i386/xen/xen-pvh.c
+++ b/hw/i386/xen/xen-pvh.c
@@ -76,7 +76,7 @@ static void xen_pvh_set_pci_intx_irq(void *opaque, int irq, int level)
     }
 }
 
-static void xen_pvh_machine_class_init(ObjectClass *oc, void *data)
+static void xen_pvh_machine_class_init(ObjectClass *oc, const void *data)
 {
     XenPVHMachineClass *xpc = XEN_PVH_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
diff --git a/hw/i386/xen/xen_apic.c b/hw/i386/xen/xen_apic.c
index a94e9005cb..f30398fa4a 100644
--- a/hw/i386/xen/xen_apic.c
+++ b/hw/i386/xen/xen_apic.c
@@ -76,7 +76,7 @@ static void xen_send_msi(MSIMessage *msi)
     xen_hvm_inject_msi(msi->address, msi->data);
 }
 
-static void xen_apic_class_init(ObjectClass *klass, void *data)
+static void xen_apic_class_init(ObjectClass *klass, const void *data)
 {
     APICCommonClass *k = APIC_COMMON_CLASS(klass);
 
diff --git a/hw/i386/xen/xen_platform.c b/hw/i386/xen/xen_platform.c
index dd648a2ee9..c8b852be0c 100644
--- a/hw/i386/xen/xen_platform.c
+++ b/hw/i386/xen/xen_platform.c
@@ -581,7 +581,7 @@ static void platform_reset(DeviceState *dev)
     platform_fixed_ioport_reset(s);
 }
 
-static void xen_platform_class_init(ObjectClass *klass, void *data)
+static void xen_platform_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -604,7 +604,7 @@ static const TypeInfo xen_platform_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIXenPlatformState),
     .class_init    = xen_platform_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/i386/xen/xen_pvdevice.c b/hw/i386/xen/xen_pvdevice.c
index 9453da97bd..87a974ae5a 100644
--- a/hw/i386/xen/xen_pvdevice.c
+++ b/hw/i386/xen/xen_pvdevice.c
@@ -122,7 +122,7 @@ static const Property xen_pv_props[] = {
     DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),
 };
 
-static void xen_pv_class_init(ObjectClass *klass, void *data)
+static void xen_pv_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -139,7 +139,7 @@ static const TypeInfo xen_pv_type_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(XenPVDevice),
     .class_init    = xen_pv_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/ide/ahci-allwinner.c b/hw/ide/ahci-allwinner.c
index 575be36fc5..bc7a116a89 100644
--- a/hw/ide/ahci-allwinner.c
+++ b/hw/ide/ahci-allwinner.c
@@ -103,7 +103,7 @@ static const VMStateDescription vmstate_allwinner_ahci = {
     }
 };
 
-static void allwinner_ahci_class_init(ObjectClass *klass, void *data)
+static void allwinner_ahci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ide/ahci-sysbus.c b/hw/ide/ahci-sysbus.c
index 3c1935d81c..210818d047 100644
--- a/hw/ide/ahci-sysbus.c
+++ b/hw/ide/ahci-sysbus.c
@@ -66,7 +66,7 @@ static const Property sysbus_ahci_properties[] = {
     DEFINE_PROP_UINT32("num-ports", SysbusAHCIState, ahci.ports, 1),
 };
 
-static void sysbus_ahci_class_init(ObjectClass *klass, void *data)
+static void sysbus_ahci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ide/cf.c b/hw/ide/cf.c
index cfb4394f80..f87cd413b6 100644
--- a/hw/ide/cf.c
+++ b/hw/ide/cf.c
@@ -31,7 +31,7 @@ static const Property ide_cf_properties[] = {
                 IDEDrive, dev.chs_trans, BIOS_ATA_TRANSLATION_AUTO),
 };
 
-static void ide_cf_class_init(ObjectClass *klass, void *data)
+static void ide_cf_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
diff --git a/hw/ide/cmd646.c b/hw/ide/cmd646.c
index 8e568e4c35..2a59516a9d 100644
--- a/hw/ide/cmd646.c
+++ b/hw/ide/cmd646.c
@@ -317,7 +317,7 @@ static const Property cmd646_ide_properties[] = {
     DEFINE_PROP_UINT32("secondary", PCIIDEState, secondary, 0),
 };
 
-static void cmd646_ide_class_init(ObjectClass *klass, void *data)
+static void cmd646_ide_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/ide/ich.c b/hw/ide/ich.c
index a83128465f..4cade0d121 100644
--- a/hw/ide/ich.c
+++ b/hw/ide/ich.c
@@ -175,7 +175,7 @@ static void pci_ich9_uninit(PCIDevice *dev)
     ahci_uninit(&d->ahci);
 }
 
-static void ich_ahci_class_init(ObjectClass *klass, void *data)
+static void ich_ahci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -197,7 +197,7 @@ static const TypeInfo ich_ahci_info = {
     .instance_size = sizeof(AHCIPCIState),
     .instance_init = pci_ich9_ahci_init,
     .class_init    = ich_ahci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/ide/ide-bus.c b/hw/ide/ide-bus.c
index 437502b5b4..b24e4d17b4 100644
--- a/hw/ide/ide-bus.c
+++ b/hw/ide/ide-bus.c
@@ -29,7 +29,7 @@
 static char *idebus_get_fw_dev_path(DeviceState *dev);
 static void idebus_unrealize(BusState *qdev);
 
-static void ide_bus_class_init(ObjectClass *klass, void *data)
+static void ide_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
diff --git a/hw/ide/ide-dev.c b/hw/ide/ide-dev.c
index 26f0517019..5d478588c6 100644
--- a/hw/ide/ide-dev.c
+++ b/hw/ide/ide-dev.c
@@ -198,7 +198,7 @@ static const Property ide_hd_properties[] = {
     DEFINE_PROP_UINT16("rotation_rate", IDEDrive, dev.rotation_rate, 0),
 };
 
-static void ide_hd_class_init(ObjectClass *klass, void *data)
+static void ide_hd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
@@ -220,7 +220,7 @@ static const Property ide_cd_properties[] = {
     DEFINE_IDE_DEV_PROPERTIES(),
 };
 
-static void ide_cd_class_init(ObjectClass *klass, void *data)
+static void ide_cd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
@@ -238,7 +238,7 @@ static const TypeInfo ide_cd_info = {
     .class_init    = ide_cd_class_init,
 };
 
-static void ide_device_class_init(ObjectClass *klass, void *data)
+static void ide_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->realize = ide_qdev_realize;
diff --git a/hw/ide/isa.c b/hw/ide/isa.c
index 4863ad8080..5f418413c1 100644
--- a/hw/ide/isa.c
+++ b/hw/ide/isa.c
@@ -107,7 +107,7 @@ static const Property isa_ide_properties[] = {
     DEFINE_PROP_UINT32("irq",     ISAIDEState, irqnum,  14),
 };
 
-static void isa_ide_class_initfn(ObjectClass *klass, void *data)
+static void isa_ide_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ide/macio.c b/hw/ide/macio.c
index c8e8e44cc9..c23bf32d2b 100644
--- a/hw/ide/macio.c
+++ b/hw/ide/macio.c
@@ -463,7 +463,7 @@ static const Property macio_ide_properties[] = {
     DEFINE_PROP_UINT32("addr", MACIOIDEState, addr, -1),
 };
 
-static void macio_ide_class_init(ObjectClass *oc, void *data)
+static void macio_ide_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ide/mmio.c b/hw/ide/mmio.c
index 13f16170ff..699874db78 100644
--- a/hw/ide/mmio.c
+++ b/hw/ide/mmio.c
@@ -145,7 +145,7 @@ static const Property mmio_ide_properties[] = {
     DEFINE_PROP_UINT32("shift", MMIOIDEState, shift, 0),
 };
 
-static void mmio_ide_class_init(ObjectClass *oc, void *data)
+static void mmio_ide_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ide/pci.c b/hw/ide/pci.c
index 0ed72e4223..1e50bb9e48 100644
--- a/hw/ide/pci.c
+++ b/hw/ide/pci.c
@@ -625,7 +625,7 @@ static const TypeInfo pci_ide_type_info = {
     .instance_size = sizeof(PCIIDEState),
     .instance_init = pci_ide_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index 818ff60d6f..a0f2709c69 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -178,7 +178,7 @@ static void pci_piix_ide_exitfn(PCIDevice *dev)
 }
 
 /* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */
-static void piix3_ide_class_init(ObjectClass *klass, void *data)
+static void piix3_ide_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -201,7 +201,7 @@ static const TypeInfo piix3_ide_info = {
 };
 
 /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */
-static void piix4_ide_class_init(ObjectClass *klass, void *data)
+static void piix4_ide_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/ide/sii3112.c b/hw/ide/sii3112.c
index ce8a1e4cba..9b28c691fd 100644
--- a/hw/ide/sii3112.c
+++ b/hw/ide/sii3112.c
@@ -290,7 +290,7 @@ static void sii3112_pci_realize(PCIDevice *dev, Error **errp)
     }
 }
 
-static void sii3112_pci_class_init(ObjectClass *klass, void *data)
+static void sii3112_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pd = PCI_DEVICE_CLASS(klass);
diff --git a/hw/ide/via.c b/hw/ide/via.c
index 89fd28f646..dedc2674c0 100644
--- a/hw/ide/via.c
+++ b/hw/ide/via.c
@@ -245,7 +245,7 @@ static void via_ide_exitfn(PCIDevice *dev)
     }
 }
 
-static void via_ide_class_init(ObjectClass *klass, void *data)
+static void via_ide_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/input/adb-kbd.c b/hw/input/adb-kbd.c
index 3649d03ef2..507557deec 100644
--- a/hw/input/adb-kbd.c
+++ b/hw/input/adb-kbd.c
@@ -375,7 +375,7 @@ static void adb_kbd_initfn(Object *obj)
     d->devaddr = ADB_DEVID_KEYBOARD;
 }
 
-static void adb_kbd_class_init(ObjectClass *oc, void *data)
+static void adb_kbd_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc);
diff --git a/hw/input/adb-mouse.c b/hw/input/adb-mouse.c
index 77b280d242..373ef3f953 100644
--- a/hw/input/adb-mouse.c
+++ b/hw/input/adb-mouse.c
@@ -287,7 +287,7 @@ static void adb_mouse_initfn(Object *obj)
     d->devaddr = ADB_DEVID_MOUSE;
 }
 
-static void adb_mouse_class_init(ObjectClass *oc, void *data)
+static void adb_mouse_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc);
diff --git a/hw/input/adb.c b/hw/input/adb.c
index aff7130fd0..bcb11edca3 100644
--- a/hw/input/adb.c
+++ b/hw/input/adb.c
@@ -259,7 +259,7 @@ static void adb_bus_unrealize(BusState *qbus)
     vmstate_unregister(NULL, &vmstate_adb_bus, adb_bus);
 }
 
-static void adb_bus_class_init(ObjectClass *klass, void *data)
+static void adb_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -299,7 +299,7 @@ static void adb_device_realizefn(DeviceState *dev, Error **errp)
     bus->devices[bus->nb_devices++] = d;
 }
 
-static void adb_device_class_init(ObjectClass *oc, void *data)
+static void adb_device_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/input/lasips2.c b/hw/input/lasips2.c
index 987034efd3..de625723c7 100644
--- a/hw/input/lasips2.c
+++ b/hw/input/lasips2.c
@@ -306,7 +306,7 @@ static void lasips2_init(Object *obj)
                             "lasips2-port-input-irq", 2);
 }
 
-static void lasips2_class_init(ObjectClass *klass, void *data)
+static void lasips2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -347,7 +347,7 @@ static void lasips2_port_init(Object *obj)
                             "ps2-input-irq", 1);
 }
 
-static void lasips2_port_class_init(ObjectClass *klass, void *data)
+static void lasips2_port_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -397,7 +397,7 @@ static void lasips2_kbd_port_init(Object *obj)
     lp->lasips2 = container_of(s, LASIPS2State, kbd_port);
 }
 
-static void lasips2_kbd_port_class_init(ObjectClass *klass, void *data)
+static void lasips2_kbd_port_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     LASIPS2PortDeviceClass *lpdc = LASIPS2_PORT_CLASS(klass);
@@ -447,7 +447,7 @@ static void lasips2_mouse_port_init(Object *obj)
     lp->lasips2 = container_of(s, LASIPS2State, mouse_port);
 }
 
-static void lasips2_mouse_port_class_init(ObjectClass *klass, void *data)
+static void lasips2_mouse_port_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     LASIPS2PortDeviceClass *lpdc = LASIPS2_PORT_CLASS(klass);
diff --git a/hw/input/pckbd.c b/hw/input/pckbd.c
index fa0c549eb9..71f5f976e9 100644
--- a/hw/input/pckbd.c
+++ b/hw/input/pckbd.c
@@ -750,7 +750,7 @@ static const VMStateDescription vmstate_kbd_mmio = {
     }
 };
 
-static void i8042_mmio_class_init(ObjectClass *klass, void *data)
+static void i8042_mmio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -939,7 +939,7 @@ static const Property i8042_properties[] = {
     DEFINE_PROP_UINT8("mouse-irq", ISAKBDState, mouse_irq, 12),
 };
 
-static void i8042_class_initfn(ObjectClass *klass, void *data)
+static void i8042_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
@@ -958,7 +958,7 @@ static const TypeInfo i8042_info = {
     .instance_size = sizeof(ISAKBDState),
     .instance_init = i8042_initfn,
     .class_init    = i8042_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
diff --git a/hw/input/pl050.c b/hw/input/pl050.c
index 6519e260ed..c5f4a3fa84 100644
--- a/hw/input/pl050.c
+++ b/hw/input/pl050.c
@@ -203,7 +203,7 @@ static void pl050_mouse_init(Object *obj)
     object_initialize_child(obj, "mouse", &s->mouse, TYPE_PS2_MOUSE_DEVICE);
 }
 
-static void pl050_kbd_class_init(ObjectClass *oc, void *data)
+static void pl050_kbd_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PL050DeviceClass *pdc = PL050_CLASS(oc);
@@ -220,7 +220,7 @@ static const TypeInfo pl050_kbd_info = {
     .class_init    = pl050_kbd_class_init,
 };
 
-static void pl050_mouse_class_init(ObjectClass *oc, void *data)
+static void pl050_mouse_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PL050DeviceClass *pdc = PL050_CLASS(oc);
@@ -249,7 +249,7 @@ static void pl050_init(Object *obj)
     qdev_init_gpio_in_named(DEVICE(obj), pl050_set_irq, "ps2-input-irq", 1);
 }
 
-static void pl050_class_init(ObjectClass *oc, void *data)
+static void pl050_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/input/ps2.c b/hw/input/ps2.c
index 6a41b024c8..7f7b1fce2e 100644
--- a/hw/input/ps2.c
+++ b/hw/input/ps2.c
@@ -1254,7 +1254,7 @@ static void ps2_mouse_realize(DeviceState *dev, Error **errp)
     qemu_input_handler_register(dev, &ps2_mouse_handler);
 }
 
-static void ps2_kbd_class_init(ObjectClass *klass, void *data)
+static void ps2_kbd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -1273,7 +1273,7 @@ static const TypeInfo ps2_kbd_info = {
     .class_init    = ps2_kbd_class_init
 };
 
-static void ps2_mouse_class_init(ObjectClass *klass, void *data)
+static void ps2_mouse_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -1299,7 +1299,7 @@ static void ps2_init(Object *obj)
     qdev_init_gpio_out(DEVICE(obj), &s->irq, 1);
 }
 
-static void ps2_class_init(ObjectClass *klass, void *data)
+static void ps2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/input/stellaris_gamepad.c b/hw/input/stellaris_gamepad.c
index 98382a0e15..fec1161c9c 100644
--- a/hw/input/stellaris_gamepad.c
+++ b/hw/input/stellaris_gamepad.c
@@ -82,7 +82,7 @@ static const Property stellaris_gamepad_properties[] = {
                       keycodes, qdev_prop_uint32, uint32_t),
 };
 
-static void stellaris_gamepad_class_init(ObjectClass *klass, void *data)
+static void stellaris_gamepad_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/input/virtio-input-hid.c b/hw/input/virtio-input-hid.c
index 812faaef8f..d986c3c16e 100644
--- a/hw/input/virtio-input-hid.c
+++ b/hw/input/virtio-input-hid.c
@@ -242,7 +242,7 @@ static const Property virtio_input_hid_properties[] = {
     DEFINE_PROP_UINT32("head", VirtIOInputHID, head, 0),
 };
 
-static void virtio_input_hid_class_init(ObjectClass *klass, void *data)
+static void virtio_input_hid_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOInputClass *vic = VIRTIO_INPUT_CLASS(klass);
@@ -383,7 +383,7 @@ static const Property virtio_mouse_properties[] = {
     DEFINE_PROP_BOOL("wheel-axis", VirtIOInputHID, wheel_axis, true),
 };
 
-static void virtio_mouse_class_init(ObjectClass *klass, void *data)
+static void virtio_mouse_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -507,7 +507,7 @@ static const Property virtio_tablet_properties[] = {
     DEFINE_PROP_BOOL("wheel-axis", VirtIOInputHID, wheel_axis, true),
 };
 
-static void virtio_tablet_class_init(ObjectClass *klass, void *data)
+static void virtio_tablet_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/input/virtio-input-host.c b/hw/input/virtio-input-host.c
index b21a79046e..bbfee9d3b9 100644
--- a/hw/input/virtio-input-host.c
+++ b/hw/input/virtio-input-host.c
@@ -224,7 +224,7 @@ static const Property virtio_input_host_properties[] = {
     DEFINE_PROP_STRING("evdev", VirtIOInputHost, evdev),
 };
 
-static void virtio_input_host_class_init(ObjectClass *klass, void *data)
+static void virtio_input_host_class_init(ObjectClass *klass, const void *data)
 {
     VirtIOInputClass *vic = VIRTIO_INPUT_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/input/virtio-input.c b/hw/input/virtio-input.c
index 1394d99c6b..1818cbddc7 100644
--- a/hw/input/virtio-input.c
+++ b/hw/input/virtio-input.c
@@ -304,7 +304,7 @@ static const Property virtio_input_properties[] = {
     DEFINE_PROP_STRING("serial", VirtIOInput, serial),
 };
 
-static void virtio_input_class_init(ObjectClass *klass, void *data)
+static void virtio_input_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/intc/allwinner-a10-pic.c b/hw/intc/allwinner-a10-pic.c
index 93a604f7a0..0409734155 100644
--- a/hw/intc/allwinner-a10-pic.c
+++ b/hw/intc/allwinner-a10-pic.c
@@ -187,7 +187,7 @@ static void aw_a10_pic_reset(DeviceState *d)
     }
 }
 
-static void aw_a10_pic_class_init(ObjectClass *klass, void *data)
+static void aw_a10_pic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/apic.c b/hw/intc/apic.c
index d18c1dbf2c..bcb103560c 100644
--- a/hw/intc/apic.c
+++ b/hw/intc/apic.c
@@ -1176,7 +1176,7 @@ static void apic_unrealize(DeviceState *dev)
     local_apics[s->initial_apic_id] = NULL;
 }
 
-static void apic_class_init(ObjectClass *klass, void *data)
+static void apic_class_init(ObjectClass *klass, const void *data)
 {
     APICCommonClass *k = APIC_COMMON_CLASS(klass);
 
diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c
index 2a3e878c4d..37a7a7019d 100644
--- a/hw/intc/apic_common.c
+++ b/hw/intc/apic_common.c
@@ -466,7 +466,7 @@ static void apic_common_initfn(Object *obj)
                         apic_common_set_id, NULL, NULL);
 }
 
-static void apic_common_class_init(ObjectClass *klass, void *data)
+static void apic_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/arm_gic.c b/hw/intc/arm_gic.c
index 3581ff8e8a..d18bef40fc 100644
--- a/hw/intc/arm_gic.c
+++ b/hw/intc/arm_gic.c
@@ -2162,7 +2162,7 @@ static void arm_gic_realize(DeviceState *dev, Error **errp)
 
 }
 
-static void arm_gic_class_init(ObjectClass *klass, void *data)
+static void arm_gic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ARMGICClass *agc = ARM_GIC_CLASS(klass);
diff --git a/hw/intc/arm_gic_common.c b/hw/intc/arm_gic_common.c
index 5ac56e3389..0f0c48d89a 100644
--- a/hw/intc/arm_gic_common.c
+++ b/hw/intc/arm_gic_common.c
@@ -362,7 +362,7 @@ static const Property arm_gic_common_properties[] = {
     DEFINE_PROP_UINT32("num-priority-bits", GICState, n_prio_bits, 8),
 };
 
-static void arm_gic_common_class_init(ObjectClass *klass, void *data)
+static void arm_gic_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -382,7 +382,7 @@ static const TypeInfo arm_gic_common_type = {
     .class_size = sizeof(ARMGICCommonClass),
     .class_init = arm_gic_common_class_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo []) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ARM_LINUX_BOOT_IF },
         { },
     },
diff --git a/hw/intc/arm_gic_kvm.c b/hw/intc/arm_gic_kvm.c
index 40adb02865..1e9232f47c 100644
--- a/hw/intc/arm_gic_kvm.c
+++ b/hw/intc/arm_gic_kvm.c
@@ -584,7 +584,7 @@ static void kvm_arm_gic_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void kvm_arm_gic_class_init(ObjectClass *klass, void *data)
+static void kvm_arm_gic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/intc/arm_gicv2m.c b/hw/intc/arm_gicv2m.c
index 3a8c62698c..cef0688221 100644
--- a/hw/intc/arm_gicv2m.c
+++ b/hw/intc/arm_gicv2m.c
@@ -175,7 +175,7 @@ static const Property gicv2m_properties[] = {
     DEFINE_PROP_UINT32("num-spi", ARMGICv2mState, num_spi, 64),
 };
 
-static void gicv2m_class_init(ObjectClass *klass, void *data)
+static void gicv2m_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/arm_gicv3.c b/hw/intc/arm_gicv3.c
index 58e18fff54..6059ce926a 100644
--- a/hw/intc/arm_gicv3.c
+++ b/hw/intc/arm_gicv3.c
@@ -452,7 +452,7 @@ static void arm_gic_realize(DeviceState *dev, Error **errp)
     gicv3_init_cpuif(s);
 }
 
-static void arm_gicv3_class_init(ObjectClass *klass, void *data)
+static void arm_gicv3_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ARMGICv3CommonClass *agcc = ARM_GICV3_COMMON_CLASS(klass);
diff --git a/hw/intc/arm_gicv3_common.c b/hw/intc/arm_gicv3_common.c
index 76b2283c92..1cee68193c 100644
--- a/hw/intc/arm_gicv3_common.c
+++ b/hw/intc/arm_gicv3_common.c
@@ -623,7 +623,7 @@ static const Property arm_gicv3_common_properties[] = {
                      MemoryRegion *),
 };
 
-static void arm_gicv3_common_class_init(ObjectClass *klass, void *data)
+static void arm_gicv3_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -644,7 +644,7 @@ static const TypeInfo arm_gicv3_common_type = {
     .class_init = arm_gicv3_common_class_init,
     .instance_finalize = arm_gicv3_finalize,
     .abstract = true,
-    .interfaces = (InterfaceInfo []) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ARM_LINUX_BOOT_IF },
         { },
     },
diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 936368c901..577b445405 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -2007,7 +2007,7 @@ static const Property gicv3_its_props[] = {
                      GICv3State *),
 };
 
-static void gicv3_its_class_init(ObjectClass *klass, void *data)
+static void gicv3_its_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/intc/arm_gicv3_its_common.c b/hw/intc/arm_gicv3_its_common.c
index 70dbee83a6..e946e3fb87 100644
--- a/hw/intc/arm_gicv3_its_common.c
+++ b/hw/intc/arm_gicv3_its_common.c
@@ -135,7 +135,7 @@ static void gicv3_its_common_reset_hold(Object *obj, ResetType type)
     memset(&s->baser, 0, sizeof(s->baser));
 }
 
-static void gicv3_its_common_class_init(ObjectClass *klass, void *data)
+static void gicv3_its_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c
index e198974560..9812d50859 100644
--- a/hw/intc/arm_gicv3_its_kvm.c
+++ b/hw/intc/arm_gicv3_its_kvm.c
@@ -239,7 +239,7 @@ static const Property kvm_arm_its_props[] = {
                      GICv3State *),
 };
 
-static void kvm_arm_its_class_init(ObjectClass *klass, void *data)
+static void kvm_arm_its_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/intc/arm_gicv3_kvm.c b/hw/intc/arm_gicv3_kvm.c
index 8e17cab2a0..3be3bf6c28 100644
--- a/hw/intc/arm_gicv3_kvm.c
+++ b/hw/intc/arm_gicv3_kvm.c
@@ -893,7 +893,7 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void kvm_arm_gicv3_class_init(ObjectClass *klass, void *data)
+static void kvm_arm_gicv3_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
index 7212c87c68..83ff74f899 100644
--- a/hw/intc/armv7m_nvic.c
+++ b/hw/intc/armv7m_nvic.c
@@ -2730,7 +2730,7 @@ static void armv7m_nvic_instance_init(Object *obj)
     qdev_init_gpio_in_named(dev, nvic_nmi_trigger, "NMI", 1);
 }
 
-static void armv7m_nvic_class_init(ObjectClass *klass, void *data)
+static void armv7m_nvic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/aspeed_intc.c b/hw/intc/aspeed_intc.c
index bae7dc95ea..be7f516a3b 100644
--- a/hw/intc/aspeed_intc.c
+++ b/hw/intc/aspeed_intc.c
@@ -583,7 +583,7 @@ static void aspeed_intc_unrealize(DeviceState *dev)
     s->regs = NULL;
 }
 
-static void aspeed_intc_class_init(ObjectClass *klass, void *data)
+static void aspeed_intc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedINTCClass *aic = ASPEED_INTC_CLASS(klass);
@@ -620,7 +620,7 @@ static AspeedINTCIRQ aspeed_2700_intc_irqs[ASPEED_INTC_MAX_INPINS] = {
     {9, 18, 1, R_GICINT136_EN, R_GICINT136_STATUS},
 };
 
-static void aspeed_2700_intc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_intc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedINTCClass *aic = ASPEED_INTC_CLASS(klass);
@@ -651,7 +651,7 @@ static AspeedINTCIRQ aspeed_2700_intcio_irqs[ASPEED_INTC_MAX_INPINS] = {
     {5, 5, 1, R_GICINT197_EN, R_GICINT197_STATUS},
 };
 
-static void aspeed_2700_intcio_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_intcio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedINTCClass *aic = ASPEED_INTC_CLASS(klass);
diff --git a/hw/intc/aspeed_vic.c b/hw/intc/aspeed_vic.c
index 55fe51a667..7120088454 100644
--- a/hw/intc/aspeed_vic.c
+++ b/hw/intc/aspeed_vic.c
@@ -339,7 +339,7 @@ static const VMStateDescription vmstate_aspeed_vic = {
     }
 };
 
-static void aspeed_vic_class_init(ObjectClass *klass, void *data)
+static void aspeed_vic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = aspeed_vic_realize;
diff --git a/hw/intc/bcm2835_ic.c b/hw/intc/bcm2835_ic.c
index 4a42fcf60d..55e0a5a503 100644
--- a/hw/intc/bcm2835_ic.c
+++ b/hw/intc/bcm2835_ic.c
@@ -219,7 +219,7 @@ static const VMStateDescription vmstate_bcm2835_ic = {
     }
 };
 
-static void bcm2835_ic_class_init(ObjectClass *klass, void *data)
+static void bcm2835_ic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/bcm2836_control.c b/hw/intc/bcm2836_control.c
index 197a0e2ccf..1c02853669 100644
--- a/hw/intc/bcm2836_control.c
+++ b/hw/intc/bcm2836_control.c
@@ -384,7 +384,7 @@ static const VMStateDescription vmstate_bcm2836_control = {
     }
 };
 
-static void bcm2836_control_class_init(ObjectClass *klass, void *data)
+static void bcm2836_control_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/exynos4210_combiner.c b/hw/intc/exynos4210_combiner.c
index 6ddbcd4c6d..ebbe23436f 100644
--- a/hw/intc/exynos4210_combiner.c
+++ b/hw/intc/exynos4210_combiner.c
@@ -329,7 +329,7 @@ static const Property exynos4210_combiner_properties[] = {
     DEFINE_PROP_UINT32("external", Exynos4210CombinerState, external, 0),
 };
 
-static void exynos4210_combiner_class_init(ObjectClass *klass, void *data)
+static void exynos4210_combiner_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/exynos4210_gic.c b/hw/intc/exynos4210_gic.c
index 01a53936d3..7e2d79d00c 100644
--- a/hw/intc/exynos4210_gic.c
+++ b/hw/intc/exynos4210_gic.c
@@ -115,7 +115,7 @@ static const Property exynos4210_gic_properties[] = {
     DEFINE_PROP_UINT32("num-cpu", Exynos4210GicState, num_cpu, 1),
 };
 
-static void exynos4210_gic_class_init(ObjectClass *klass, void *data)
+static void exynos4210_gic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/goldfish_pic.c b/hw/intc/goldfish_pic.c
index aa5162c18f..2359861785 100644
--- a/hw/intc/goldfish_pic.c
+++ b/hw/intc/goldfish_pic.c
@@ -185,7 +185,7 @@ static const Property goldfish_pic_properties[] = {
     DEFINE_PROP_UINT8("index", GoldfishPICState, idx, 0),
 };
 
-static void goldfish_pic_class_init(ObjectClass *oc, void *data)
+static void goldfish_pic_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(oc);
@@ -204,7 +204,7 @@ static const TypeInfo goldfish_pic_info = {
     .class_init = goldfish_pic_class_init,
     .instance_init = goldfish_pic_instance_init,
     .instance_size = sizeof(GoldfishPICState),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
          { TYPE_INTERRUPT_STATS_PROVIDER },
          { }
     },
diff --git a/hw/intc/grlib_irqmp.c b/hw/intc/grlib_irqmp.c
index 95cdb411d2..e0f26466ba 100644
--- a/hw/intc/grlib_irqmp.c
+++ b/hw/intc/grlib_irqmp.c
@@ -380,7 +380,7 @@ static const Property grlib_irqmp_properties[] = {
     DEFINE_PROP_UINT32("ncpus", IRQMP, ncpus, 1),
 };
 
-static void grlib_irqmp_class_init(ObjectClass *klass, void *data)
+static void grlib_irqmp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/heathrow_pic.c b/hw/intc/heathrow_pic.c
index 729498f1df..447e8c25d8 100644
--- a/hw/intc/heathrow_pic.c
+++ b/hw/intc/heathrow_pic.c
@@ -184,7 +184,7 @@ static void heathrow_init(Object *obj)
     sysbus_init_mmio(sbd, &s->mem);
 }
 
-static void heathrow_class_init(ObjectClass *oc, void *data)
+static void heathrow_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/intc/i8259.c b/hw/intc/i8259.c
index d88b20f40b..b6f96bf208 100644
--- a/hw/intc/i8259.c
+++ b/hw/intc/i8259.c
@@ -32,10 +32,7 @@
 #include "trace.h"
 #include "qom/object.h"
 
-/* debug PIC */
-//#define DEBUG_PIC
-
-//#define DEBUG_IRQ_LATENCY
+/*#define DEBUG_IRQ_LATENCY*/
 
 #define TYPE_I8259 "isa-i8259"
 typedef struct PICClass PICClass;
@@ -436,7 +433,7 @@ qemu_irq *i8259_init(ISABus *bus, qemu_irq parent_irq_in)
     return irq_set;
 }
 
-static void i8259_class_init(ObjectClass *klass, void *data)
+static void i8259_class_init(ObjectClass *klass, const void *data)
 {
     PICClass *k = PIC_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/intc/i8259_common.c b/hw/intc/i8259_common.c
index c77ff683bb..602e44c8ea 100644
--- a/hw/intc/i8259_common.c
+++ b/hw/intc/i8259_common.c
@@ -200,7 +200,7 @@ static const Property pic_properties_common[] = {
     DEFINE_PROP_BIT("master", PICCommonState, master,  0, false),
 };
 
-static void pic_common_class_init(ObjectClass *klass, void *data)
+static void pic_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(klass);
@@ -226,7 +226,7 @@ static const TypeInfo pic_common_type = {
     .class_size = sizeof(PICCommonClass),
     .class_init = pic_common_class_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_INTERRUPT_STATS_PROVIDER },
         { }
     },
diff --git a/hw/intc/imx_avic.c b/hw/intc/imx_avic.c
index e1c9ce769d..09c3bfac0b 100644
--- a/hw/intc/imx_avic.c
+++ b/hw/intc/imx_avic.c
@@ -341,7 +341,7 @@ static void imx_avic_init(Object *obj)
 }
 
 
-static void imx_avic_class_init(ObjectClass *klass, void *data)
+static void imx_avic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/imx_gpcv2.c b/hw/intc/imx_gpcv2.c
index 9e5cf28371..58d286c1cf 100644
--- a/hw/intc/imx_gpcv2.c
+++ b/hw/intc/imx_gpcv2.c
@@ -102,7 +102,7 @@ static const VMStateDescription vmstate_imx_gpcv2 = {
     },
 };
 
-static void imx_gpcv2_class_init(ObjectClass *klass, void *data)
+static void imx_gpcv2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c
index 8cd1d85e06..133bef852d 100644
--- a/hw/intc/ioapic.c
+++ b/hw/intc/ioapic.c
@@ -480,7 +480,7 @@ static const Property ioapic_properties[] = {
     DEFINE_PROP_UINT8("version", IOAPICCommonState, version, IOAPIC_VER_DEF),
 };
 
-static void ioapic_class_init(ObjectClass *klass, void *data)
+static void ioapic_class_init(ObjectClass *klass, const void *data)
 {
     IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/intc/ioapic_common.c b/hw/intc/ioapic_common.c
index 769896353a..fce3486e51 100644
--- a/hw/intc/ioapic_common.c
+++ b/hw/intc/ioapic_common.c
@@ -197,7 +197,7 @@ static const VMStateDescription vmstate_ioapic_common = {
     }
 };
 
-static void ioapic_common_class_init(ObjectClass *klass, void *data)
+static void ioapic_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(klass);
@@ -215,7 +215,7 @@ static const TypeInfo ioapic_common_type = {
     .class_size = sizeof(IOAPICCommonClass),
     .class_init = ioapic_common_class_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_INTERRUPT_STATS_PROVIDER },
         { }
     },
diff --git a/hw/intc/loongarch_extioi.c b/hw/intc/loongarch_extioi.c
index a558c50185..f4fe961a98 100644
--- a/hw/intc/loongarch_extioi.c
+++ b/hw/intc/loongarch_extioi.c
@@ -401,7 +401,7 @@ static int vmstate_extioi_post_load(void *opaque, int version_id)
     return 0;
 }
 
-static void loongarch_extioi_class_init(ObjectClass *klass, void *data)
+static void loongarch_extioi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     LoongArchExtIOIClass *lec = LOONGARCH_EXTIOI_CLASS(klass);
diff --git a/hw/intc/loongarch_extioi_common.c b/hw/intc/loongarch_extioi_common.c
index ff3974f2a1..9e1589060c 100644
--- a/hw/intc/loongarch_extioi_common.c
+++ b/hw/intc/loongarch_extioi_common.c
@@ -174,7 +174,8 @@ static const Property extioi_properties[] = {
                     features, EXTIOI_HAS_VIRT_EXTENSION, 0),
 };
 
-static void loongarch_extioi_common_class_init(ObjectClass *klass, void *data)
+static void loongarch_extioi_common_class_init(ObjectClass *klass,
+                                               const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     LoongArchExtIOICommonClass *lecc = LOONGARCH_EXTIOI_COMMON_CLASS(klass);
@@ -195,7 +196,7 @@ static const TypeInfo loongarch_extioi_common_types[] = {
         .instance_size      = sizeof(LoongArchExtIOICommonState),
         .class_size         = sizeof(LoongArchExtIOICommonClass),
         .class_init         = loongarch_extioi_common_class_init,
-        .interfaces         = (InterfaceInfo[]) {
+        .interfaces         = (const InterfaceInfo[]) {
             { TYPE_HOTPLUG_HANDLER },
             { }
         },
diff --git a/hw/intc/loongarch_ipi.c b/hw/intc/loongarch_ipi.c
index b10641dd03..2f8bb57828 100644
--- a/hw/intc/loongarch_ipi.c
+++ b/hw/intc/loongarch_ipi.c
@@ -140,7 +140,7 @@ static void loongarch_ipi_cpu_unplug(HotplugHandler *hotplug_dev,
     core->cpu = NULL;
 }
 
-static void loongarch_ipi_class_init(ObjectClass *klass, void *data)
+static void loongarch_ipi_class_init(ObjectClass *klass, const void *data)
 {
     LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
@@ -162,7 +162,7 @@ static const TypeInfo loongarch_ipi_types[] = {
         .instance_size      = sizeof(LoongarchIPIState),
         .class_size         = sizeof(LoongarchIPIClass),
         .class_init         = loongarch_ipi_class_init,
-        .interfaces         = (InterfaceInfo[]) {
+        .interfaces         = (const InterfaceInfo[]) {
             { TYPE_HOTPLUG_HANDLER },
             { }
         },
diff --git a/hw/intc/loongarch_pch_msi.c b/hw/intc/loongarch_pch_msi.c
index bc93504ff7..06eb944da0 100644
--- a/hw/intc/loongarch_pch_msi.c
+++ b/hw/intc/loongarch_pch_msi.c
@@ -79,7 +79,7 @@ static const Property loongarch_msi_properties[] = {
     DEFINE_PROP_UINT32("msi_irq_num",  LoongArchPCHMSI, irq_num, 0),
 };
 
-static void loongarch_pch_msi_class_init(ObjectClass *klass, void *data)
+static void loongarch_pch_msi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/loongarch_pch_pic.c b/hw/intc/loongarch_pch_pic.c
index acd75ccb0c..6c2b6de3f0 100644
--- a/hw/intc/loongarch_pch_pic.c
+++ b/hw/intc/loongarch_pch_pic.c
@@ -404,7 +404,7 @@ static void loongarch_pic_realize(DeviceState *dev, Error **errp)
 
 }
 
-static void loongarch_pic_class_init(ObjectClass *klass, void *data)
+static void loongarch_pic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     LoongarchPICClass *lpc = LOONGARCH_PIC_CLASS(klass);
diff --git a/hw/intc/loongarch_pic_common.c b/hw/intc/loongarch_pic_common.c
index e7f541db4b..fdb250c418 100644
--- a/hw/intc/loongarch_pic_common.c
+++ b/hw/intc/loongarch_pic_common.c
@@ -71,7 +71,8 @@ static const VMStateDescription vmstate_loongarch_pic_common = {
     }
 };
 
-static void loongarch_pic_common_class_init(ObjectClass *klass, void *data)
+static void loongarch_pic_common_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     LoongArchPICCommonClass *lpcc = LOONGARCH_PIC_COMMON_CLASS(klass);
diff --git a/hw/intc/loongson_ipi.c b/hw/intc/loongson_ipi.c
index d2268a27f8..fbc73e8b00 100644
--- a/hw/intc/loongson_ipi.c
+++ b/hw/intc/loongson_ipi.c
@@ -101,7 +101,7 @@ static const Property loongson_ipi_properties[] = {
     DEFINE_PROP_UINT32("num-cpu", LoongsonIPICommonState, num_cpu, 1),
 };
 
-static void loongson_ipi_class_init(ObjectClass *klass, void *data)
+static void loongson_ipi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     LoongsonIPIClass *lic = LOONGSON_IPI_CLASS(klass);
diff --git a/hw/intc/loongson_ipi_common.c b/hw/intc/loongson_ipi_common.c
index f5ab5024c0..f32661c40f 100644
--- a/hw/intc/loongson_ipi_common.c
+++ b/hw/intc/loongson_ipi_common.c
@@ -303,7 +303,7 @@ static const VMStateDescription vmstate_loongson_ipi_common = {
     }
 };
 
-static void loongson_ipi_common_class_init(ObjectClass *klass, void *data)
+static void loongson_ipi_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass);
diff --git a/hw/intc/m68k_irqc.c b/hw/intc/m68k_irqc.c
index a82b80f5c6..2532322618 100644
--- a/hw/intc/m68k_irqc.c
+++ b/hw/intc/m68k_irqc.c
@@ -90,7 +90,7 @@ static const Property m68k_irqc_properties[] = {
                      TYPE_M68K_CPU, ArchCPU *),
 };
 
-static void m68k_irqc_class_init(ObjectClass *oc, void *data)
+static void m68k_irqc_class_init(ObjectClass *oc, const void *data)
  {
     DeviceClass *dc = DEVICE_CLASS(oc);
     NMIClass *nc = NMI_CLASS(oc);
@@ -110,7 +110,7 @@ static const TypeInfo m68k_irqc_type_info = {
     .instance_size = sizeof(M68KIRQCState),
     .instance_init = m68k_irqc_instance_init,
     .class_init = m68k_irqc_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
          { TYPE_NMI },
          { TYPE_INTERRUPT_STATS_PROVIDER },
          { }
diff --git a/hw/intc/mips_gic.c b/hw/intc/mips_gic.c
index 627a76ba7b..0c50ba41f6 100644
--- a/hw/intc/mips_gic.c
+++ b/hw/intc/mips_gic.c
@@ -442,7 +442,7 @@ static const Property mips_gic_properties[] = {
     DEFINE_PROP_UINT32("num-irq", MIPSGICState, num_irq, 256),
 };
 
-static void mips_gic_class_init(ObjectClass *klass, void *data)
+static void mips_gic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/omap_intc.c b/hw/intc/omap_intc.c
index 095a3d504f..9e8737be33 100644
--- a/hw/intc/omap_intc.c
+++ b/hw/intc/omap_intc.c
@@ -379,7 +379,7 @@ static const Property omap_intc_properties[] = {
     DEFINE_PROP_UINT32("size", OMAPIntcState, size, 0x100),
 };
 
-static void omap_intc_class_init(ObjectClass *klass, void *data)
+static void omap_intc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/ompic.c b/hw/intc/ompic.c
index 169baf2ded..047c367478 100644
--- a/hw/intc/ompic.c
+++ b/hw/intc/ompic.c
@@ -155,7 +155,7 @@ static const VMStateDescription vmstate_or1k_ompic = {
     }
 };
 
-static void or1k_ompic_class_init(ObjectClass *klass, void *data)
+static void or1k_ompic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/openpic.c b/hw/intc/openpic.c
index 78a82d0d30..87733eb7c3 100644
--- a/hw/intc/openpic.c
+++ b/hw/intc/openpic.c
@@ -1611,7 +1611,7 @@ static const Property openpic_properties[] = {
     DEFINE_PROP_UINT32("nb_cpus", OpenPICState, nb_cpus, 1),
 };
 
-static void openpic_class_init(ObjectClass *oc, void *data)
+static void openpic_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/intc/openpic_kvm.c b/hw/intc/openpic_kvm.c
index 9cdaa97004..673ea9ca05 100644
--- a/hw/intc/openpic_kvm.c
+++ b/hw/intc/openpic_kvm.c
@@ -267,7 +267,7 @@ static const Property kvm_openpic_properties[] = {
                        OPENPIC_MODEL_FSL_MPIC_20),
 };
 
-static void kvm_openpic_class_init(ObjectClass *oc, void *data)
+static void kvm_openpic_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/intc/pl190.c b/hw/intc/pl190.c
index a5e2d76315..838c21c4a0 100644
--- a/hw/intc/pl190.c
+++ b/hw/intc/pl190.c
@@ -273,7 +273,7 @@ static const VMStateDescription vmstate_pl190 = {
     }
 };
 
-static void pl190_class_init(ObjectClass *klass, void *data)
+static void pl190_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/pnv_xive.c b/hw/intc/pnv_xive.c
index ccbe95a58e..935c0e4742 100644
--- a/hw/intc/pnv_xive.c
+++ b/hw/intc/pnv_xive.c
@@ -2068,7 +2068,7 @@ static const Property pnv_xive_properties[] = {
     DEFINE_PROP_LINK("chip", PnvXive, chip, TYPE_PNV_CHIP, PnvChip *),
 };
 
-static void pnv_xive_class_init(ObjectClass *klass, void *data)
+static void pnv_xive_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
@@ -2106,7 +2106,7 @@ static const TypeInfo pnv_xive_info = {
     .instance_size = sizeof(PnvXive),
     .class_init    = pnv_xive_class_init,
     .class_size    = sizeof(PnvXiveClass),
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
diff --git a/hw/intc/pnv_xive2.c b/hw/intc/pnv_xive2.c
index 0b81dad6ba..ec8b0c68f1 100644
--- a/hw/intc/pnv_xive2.c
+++ b/hw/intc/pnv_xive2.c
@@ -2505,7 +2505,7 @@ static int pnv_xive2_dt_xscom(PnvXScomInterface *dev, void *fdt,
     return 0;
 }
 
-static void pnv_xive2_class_init(ObjectClass *klass, void *data)
+static void pnv_xive2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
@@ -2547,7 +2547,7 @@ static const TypeInfo pnv_xive2_info = {
     .instance_size = sizeof(PnvXive2),
     .class_init    = pnv_xive2_class_init,
     .class_size    = sizeof(PnvXive2Class),
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
diff --git a/hw/intc/ppc-uic.c b/hw/intc/ppc-uic.c
index 7de4bf9885..bc4dc90ade 100644
--- a/hw/intc/ppc-uic.c
+++ b/hw/intc/ppc-uic.c
@@ -281,7 +281,7 @@ static const VMStateDescription ppc_uic_vmstate = {
     },
 };
 
-static void ppc_uic_class_init(ObjectClass *klass, void *data)
+static void ppc_uic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/realview_gic.c b/hw/intc/realview_gic.c
index 9b12116b2a..63e25c2a78 100644
--- a/hw/intc/realview_gic.c
+++ b/hw/intc/realview_gic.c
@@ -63,7 +63,7 @@ static void realview_gic_init(Object *obj)
     qdev_prop_set_uint32(DEVICE(&s->gic), "num-cpu", 1);
 }
 
-static void realview_gic_class_init(ObjectClass *oc, void *data)
+static void realview_gic_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/intc/riscv_aclint.c b/hw/intc/riscv_aclint.c
index db374a7c2d..b0139f03f5 100644
--- a/hw/intc/riscv_aclint.c
+++ b/hw/intc/riscv_aclint.c
@@ -328,7 +328,7 @@ static const VMStateDescription vmstate_riscv_mtimer = {
         }
 };
 
-static void riscv_aclint_mtimer_class_init(ObjectClass *klass, void *data)
+static void riscv_aclint_mtimer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = riscv_aclint_mtimer_realize;
@@ -509,7 +509,7 @@ static void riscv_aclint_swi_reset_enter(Object *obj, ResetType type)
     }
 }
 
-static void riscv_aclint_swi_class_init(ObjectClass *klass, void *data)
+static void riscv_aclint_swi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = riscv_aclint_swi_realize;
diff --git a/hw/intc/riscv_aplic.c b/hw/intc/riscv_aplic.c
index 789c4a4d6e..8bcd9f4697 100644
--- a/hw/intc/riscv_aplic.c
+++ b/hw/intc/riscv_aplic.c
@@ -997,7 +997,7 @@ static const VMStateDescription vmstate_riscv_aplic = {
         }
 };
 
-static void riscv_aplic_class_init(ObjectClass *klass, void *data)
+static void riscv_aplic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/riscv_imsic.c b/hw/intc/riscv_imsic.c
index 852f413e5a..2169988167 100644
--- a/hw/intc/riscv_imsic.c
+++ b/hw/intc/riscv_imsic.c
@@ -416,7 +416,7 @@ static const VMStateDescription vmstate_riscv_imsic = {
         }
 };
 
-static void riscv_imsic_class_init(ObjectClass *klass, void *data)
+static void riscv_imsic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/rx_icu.c b/hw/intc/rx_icu.c
index ca13c5fb37..f8615527b7 100644
--- a/hw/intc/rx_icu.c
+++ b/hw/intc/rx_icu.c
@@ -368,7 +368,7 @@ static const Property rxicu_properties[] = {
                       qdev_prop_uint8, uint8_t),
 };
 
-static void rxicu_class_init(ObjectClass *klass, void *data)
+static void rxicu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/s390_flic.c b/hw/intc/s390_flic.c
index 4fae023197..8f4c9fd52e 100644
--- a/hw/intc/s390_flic.c
+++ b/hw/intc/s390_flic.c
@@ -450,7 +450,7 @@ static const Property qemu_s390_flic_properties[] = {
                      migrate_all_state, true),
 };
 
-static void qemu_s390_flic_class_init(ObjectClass *oc, void *data)
+static void qemu_s390_flic_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc);
@@ -477,7 +477,7 @@ static void s390_flic_common_realize(DeviceState *dev, Error **errp)
     fs->ais_supported = s390_has_feat(S390_FEAT_ADAPTER_INT_SUPPRESSION);
 }
 
-static void s390_flic_class_init(ObjectClass *oc, void *data)
+static void s390_flic_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/intc/s390_flic_kvm.c b/hw/intc/s390_flic_kvm.c
index 10aaafbb31..f833a3996a 100644
--- a/hw/intc/s390_flic_kvm.c
+++ b/hw/intc/s390_flic_kvm.c
@@ -670,7 +670,7 @@ static void kvm_s390_flic_reset(DeviceState *dev)
     flic_enable_pfault(flic);
 }
 
-static void kvm_s390_flic_class_init(ObjectClass *oc, void *data)
+static void kvm_s390_flic_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc);
diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c
index a5b0f6ef1b..3160b216fd 100644
--- a/hw/intc/sifive_plic.c
+++ b/hw/intc/sifive_plic.c
@@ -446,7 +446,7 @@ static const Property sifive_plic_properties[] = {
     DEFINE_PROP_UINT32("aperture-size", SiFivePLICState, aperture_size, 0),
 };
 
-static void sifive_plic_class_init(ObjectClass *klass, void *data)
+static void sifive_plic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/slavio_intctl.c b/hw/intc/slavio_intctl.c
index f83709a857..00b80bb177 100644
--- a/hw/intc/slavio_intctl.c
+++ b/hw/intc/slavio_intctl.c
@@ -441,7 +441,7 @@ static void slavio_intctl_init(Object *obj)
     }
 }
 
-static void slavio_intctl_class_init(ObjectClass *klass, void *data)
+static void slavio_intctl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(klass);
@@ -460,7 +460,7 @@ static const TypeInfo slavio_intctl_info = {
     .instance_size = sizeof(SLAVIO_INTCTLState),
     .instance_init = slavio_intctl_init,
     .class_init    = slavio_intctl_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_INTERRUPT_STATS_PROVIDER },
         { }
     },
diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c
index ce734b03ab..440edb97d8 100644
--- a/hw/intc/spapr_xive.c
+++ b/hw/intc/spapr_xive.c
@@ -809,7 +809,7 @@ static bool spapr_xive_in_kernel_xptr(const XivePresenter *xptr)
     return spapr_xive_in_kernel(SPAPR_XIVE(xptr));
 }
 
-static void spapr_xive_class_init(ObjectClass *klass, void *data)
+static void spapr_xive_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XiveRouterClass *xrc = XIVE_ROUTER_CLASS(klass);
@@ -856,7 +856,7 @@ static const TypeInfo spapr_xive_info = {
     .instance_size = sizeof(SpaprXive),
     .class_init = spapr_xive_class_init,
     .class_size = sizeof(SpaprXiveClass),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_SPAPR_INTC },
         { }
     },
diff --git a/hw/intc/xics.c b/hw/intc/xics.c
index 9c1b7bbe9e..d9a199e883 100644
--- a/hw/intc/xics.c
+++ b/hw/intc/xics.c
@@ -350,7 +350,7 @@ static const Property icp_properties[] = {
     DEFINE_PROP_LINK(ICP_PROP_CPU, ICPState, cs, TYPE_CPU, CPUState *),
 };
 
-static void icp_class_init(ObjectClass *klass, void *data)
+static void icp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -681,7 +681,7 @@ static const Property ics_properties[] = {
                      XICSFabric *),
 };
 
-static void ics_class_init(ObjectClass *klass, void *data)
+static void ics_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/intc/xics_pnv.c b/hw/intc/xics_pnv.c
index 753c067f17..ff602d9a34 100644
--- a/hw/intc/xics_pnv.c
+++ b/hw/intc/xics_pnv.c
@@ -176,7 +176,7 @@ static void pnv_icp_realize(DeviceState *dev, Error **errp)
                           icp, "icp-thread", 0x1000);
 }
 
-static void pnv_icp_class_init(ObjectClass *klass, void *data)
+static void pnv_icp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ICPStateClass *icpc = ICP_CLASS(klass);
diff --git a/hw/intc/xics_spapr.c b/hw/intc/xics_spapr.c
index a0d97bdefe..7663596a4a 100644
--- a/hw/intc/xics_spapr.c
+++ b/hw/intc/xics_spapr.c
@@ -436,7 +436,7 @@ static void xics_spapr_deactivate(SpaprInterruptController *intc)
     }
 }
 
-static void ics_spapr_class_init(ObjectClass *klass, void *data)
+static void ics_spapr_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ICSStateClass *isc = ICS_CLASS(klass);
@@ -461,7 +461,7 @@ static const TypeInfo ics_spapr_info = {
     .name = TYPE_ICS_SPAPR,
     .parent = TYPE_ICS,
     .class_init = ics_spapr_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_SPAPR_INTC },
         { }
     },
diff --git a/hw/intc/xilinx_intc.c b/hw/intc/xilinx_intc.c
index ab1c4a3222..5257ad54b1 100644
--- a/hw/intc/xilinx_intc.c
+++ b/hw/intc/xilinx_intc.c
@@ -214,7 +214,7 @@ static const Property xilinx_intc_properties[] = {
     DEFINE_PROP_UINT32("kind-of-intr", XpsIntc, c_kind_of_intr, 0),
 };
 
-static void xilinx_intc_class_init(ObjectClass *klass, void *data)
+static void xilinx_intc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index 3eb28c2265..27b473e4d7 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -930,7 +930,7 @@ static const Property xive_tctx_properties[] = {
                      XivePresenter *),
 };
 
-static void xive_tctx_class_init(ObjectClass *klass, void *data)
+static void xive_tctx_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1412,7 +1412,7 @@ static const Property xive_source_properties[] = {
                      XiveNotifier *),
 };
 
-static void xive_source_class_init(ObjectClass *klass, void *data)
+static void xive_source_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -2085,7 +2085,7 @@ static const Property xive_router_properties[] = {
                      TYPE_XIVE_FABRIC, XiveFabric *),
 };
 
-static void xive_router_class_init(ObjectClass *klass, void *data)
+static void xive_router_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass);
@@ -2108,7 +2108,7 @@ static const TypeInfo xive_router_info = {
     .instance_size = sizeof(XiveRouter),
     .class_size    = sizeof(XiveRouterClass),
     .class_init    = xive_router_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_XIVE_NOTIFIER },
         { TYPE_XIVE_PRESENTER },
         { }
@@ -2254,7 +2254,7 @@ static const Property xive_end_source_properties[] = {
                      XiveRouter *),
 };
 
-static void xive_end_source_class_init(ObjectClass *klass, void *data)
+static void xive_end_source_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c
index 7d584dfafa..a08cf906d0 100644
--- a/hw/intc/xive2.c
+++ b/hw/intc/xive2.c
@@ -1590,7 +1590,7 @@ static const Property xive2_router_properties[] = {
                      TYPE_XIVE_FABRIC, XiveFabric *),
 };
 
-static void xive2_router_class_init(ObjectClass *klass, void *data)
+static void xive2_router_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass);
@@ -1609,7 +1609,7 @@ static const TypeInfo xive2_router_info = {
     .instance_size = sizeof(Xive2Router),
     .class_size    = sizeof(Xive2RouterClass),
     .class_init    = xive2_router_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_XIVE_NOTIFIER },
         { TYPE_XIVE_PRESENTER },
         { }
@@ -1805,7 +1805,7 @@ static const Property xive2_end_source_properties[] = {
                      Xive2Router *),
 };
 
-static void xive2_end_source_class_init(ObjectClass *klass, void *data)
+static void xive2_end_source_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/xlnx-pmu-iomod-intc.c b/hw/intc/xlnx-pmu-iomod-intc.c
index ccdab244b3..9200585e32 100644
--- a/hw/intc/xlnx-pmu-iomod-intc.c
+++ b/hw/intc/xlnx-pmu-iomod-intc.c
@@ -531,7 +531,7 @@ static const VMStateDescription vmstate_xlnx_pmu_io_intc = {
     }
 };
 
-static void xlnx_pmu_io_intc_class_init(ObjectClass *klass, void *data)
+static void xlnx_pmu_io_intc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/intc/xlnx-zynqmp-ipi.c b/hw/intc/xlnx-zynqmp-ipi.c
index 7241377298..610cd0e316 100644
--- a/hw/intc/xlnx-zynqmp-ipi.c
+++ b/hw/intc/xlnx-zynqmp-ipi.c
@@ -355,7 +355,7 @@ static const VMStateDescription vmstate_zynqmp_pmu_ipi = {
     }
 };
 
-static void xlnx_zynqmp_ipi_class_init(ObjectClass *klass, void *data)
+static void xlnx_zynqmp_ipi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ipack/ipack.c b/hw/ipack/ipack.c
index b6defae602..ab602bff73 100644
--- a/hw/ipack/ipack.c
+++ b/hw/ipack/ipack.c
@@ -74,7 +74,7 @@ static const Property ipack_device_props[] = {
     DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
 };
 
-static void ipack_device_class_init(ObjectClass *klass, void *data)
+static void ipack_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
 
diff --git a/hw/ipack/tpci200.c b/hw/ipack/tpci200.c
index 470a4203ae..40b30517c7 100644
--- a/hw/ipack/tpci200.c
+++ b/hw/ipack/tpci200.c
@@ -629,7 +629,7 @@ static const VMStateDescription vmstate_tpci200 = {
     }
 };
 
-static void tpci200_class_init(ObjectClass *klass, void *data)
+static void tpci200_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -650,7 +650,7 @@ static const TypeInfo tpci200_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(TPCI200State),
     .class_init    = tpci200_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/ipmi/ipmi.c b/hw/ipmi/ipmi.c
index fdeaa5269f..b91e487e1b 100644
--- a/hw/ipmi/ipmi.c
+++ b/hw/ipmi/ipmi.c
@@ -78,7 +78,7 @@ static int ipmi_do_hw_op(IPMIInterface *s, enum ipmi_op op, int checkonly)
     }
 }
 
-static void ipmi_interface_class_init(ObjectClass *class, void *data)
+static void ipmi_interface_class_init(ObjectClass *class, const void *data)
 {
     IPMIInterfaceClass *ik = IPMI_INTERFACE_CLASS(class);
 
@@ -112,7 +112,7 @@ static const Property ipmi_bmc_properties[] = {
     DEFINE_PROP_UINT8("slave_addr",  IPMIBmc, slave_addr, 0x20),
 };
 
-static void bmc_class_init(ObjectClass *oc, void *data)
+static void bmc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ipmi/ipmi_bmc_extern.c b/hw/ipmi/ipmi_bmc_extern.c
index e563214390..9f1ba7b2f8 100644
--- a/hw/ipmi/ipmi_bmc_extern.c
+++ b/hw/ipmi/ipmi_bmc_extern.c
@@ -513,7 +513,7 @@ static const Property ipmi_bmc_extern_properties[] = {
     DEFINE_PROP_CHR("chardev", IPMIBmcExtern, chr),
 };
 
-static void ipmi_bmc_extern_class_init(ObjectClass *oc, void *data)
+static void ipmi_bmc_extern_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     IPMIBmcClass *bk = IPMI_BMC_CLASS(oc);
diff --git a/hw/ipmi/ipmi_bmc_sim.c b/hw/ipmi/ipmi_bmc_sim.c
index 41fe6835a7..04e1dcd0e7 100644
--- a/hw/ipmi/ipmi_bmc_sim.c
+++ b/hw/ipmi/ipmi_bmc_sim.c
@@ -2278,7 +2278,7 @@ static const Property ipmi_sim_properties[] = {
     DEFINE_PROP_UUID_NODEFAULT("guid", IPMIBmcSim, uuid),
 };
 
-static void ipmi_sim_class_init(ObjectClass *oc, void *data)
+static void ipmi_sim_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     IPMIBmcClass *bk = IPMI_BMC_CLASS(oc);
diff --git a/hw/ipmi/isa_ipmi_bt.c b/hw/ipmi/isa_ipmi_bt.c
index 76585e786e..0ad91ccf68 100644
--- a/hw/ipmi/isa_ipmi_bt.c
+++ b/hw/ipmi/isa_ipmi_bt.c
@@ -139,7 +139,7 @@ static const Property ipmi_isa_properties[] = {
     DEFINE_PROP_INT32("irq",   ISAIPMIBTDevice, isairq,  5),
 };
 
-static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
+static void isa_ipmi_bt_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
@@ -161,7 +161,7 @@ static const TypeInfo isa_ipmi_bt_info = {
     .instance_size = sizeof(ISAIPMIBTDevice),
     .instance_init = isa_ipmi_bt_init,
     .class_init    = isa_ipmi_bt_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_IPMI_INTERFACE },
         { TYPE_ACPI_DEV_AML_IF },
         { }
diff --git a/hw/ipmi/isa_ipmi_kcs.c b/hw/ipmi/isa_ipmi_kcs.c
index ba3ae208b2..418d234e0f 100644
--- a/hw/ipmi/isa_ipmi_kcs.c
+++ b/hw/ipmi/isa_ipmi_kcs.c
@@ -145,7 +145,7 @@ static const Property ipmi_isa_properties[] = {
     DEFINE_PROP_INT32("irq",   ISAIPMIKCSDevice, isairq,  5),
 };
 
-static void isa_ipmi_kcs_class_init(ObjectClass *oc, void *data)
+static void isa_ipmi_kcs_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
@@ -167,7 +167,7 @@ static const TypeInfo isa_ipmi_kcs_info = {
     .instance_size = sizeof(ISAIPMIKCSDevice),
     .instance_init = isa_ipmi_kcs_init,
     .class_init    = isa_ipmi_kcs_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_IPMI_INTERFACE },
         { TYPE_ACPI_DEV_AML_IF },
         { }
diff --git a/hw/ipmi/pci_ipmi_bt.c b/hw/ipmi/pci_ipmi_bt.c
index 7ba8b3ab96..905101dcaf 100644
--- a/hw/ipmi/pci_ipmi_bt.c
+++ b/hw/ipmi/pci_ipmi_bt.c
@@ -119,7 +119,7 @@ static void *pci_ipmi_bt_get_backend_data(IPMIInterface *ii)
     return &pib->bt;
 }
 
-static void pci_ipmi_bt_class_init(ObjectClass *oc, void *data)
+static void pci_ipmi_bt_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pdc = PCI_DEVICE_CLASS(oc);
@@ -145,7 +145,7 @@ static const TypeInfo pci_ipmi_bt_info = {
     .instance_size = sizeof(PCIIPMIBTDevice),
     .instance_init = pci_ipmi_bt_instance_init,
     .class_init    = pci_ipmi_bt_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_IPMI_INTERFACE },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
diff --git a/hw/ipmi/pci_ipmi_kcs.c b/hw/ipmi/pci_ipmi_kcs.c
index 0aa35143e9..4d6cde826e 100644
--- a/hw/ipmi/pci_ipmi_kcs.c
+++ b/hw/ipmi/pci_ipmi_kcs.c
@@ -118,7 +118,7 @@ static void *pci_ipmi_kcs_get_backend_data(IPMIInterface *ii)
     return &pik->kcs;
 }
 
-static void pci_ipmi_kcs_class_init(ObjectClass *oc, void *data)
+static void pci_ipmi_kcs_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pdc = PCI_DEVICE_CLASS(oc);
@@ -144,7 +144,7 @@ static const TypeInfo pci_ipmi_kcs_info = {
     .instance_size = sizeof(PCIIPMIKCSDevice),
     .instance_init = pci_ipmi_kcs_instance_init,
     .class_init    = pci_ipmi_kcs_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_IPMI_INTERFACE },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
diff --git a/hw/ipmi/smbus_ipmi.c b/hw/ipmi/smbus_ipmi.c
index 56865df7db..78c332de54 100644
--- a/hw/ipmi/smbus_ipmi.c
+++ b/hw/ipmi/smbus_ipmi.c
@@ -351,7 +351,7 @@ static void smbus_ipmi_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
     info->uuid = sid->uuid;
 }
 
-static void smbus_ipmi_class_init(ObjectClass *oc, void *data)
+static void smbus_ipmi_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
@@ -376,7 +376,7 @@ static const TypeInfo smbus_ipmi_info = {
     .instance_size = sizeof(SMBusIPMIDevice),
     .instance_init = smbus_ipmi_init,
     .class_init    = smbus_ipmi_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_IPMI_INTERFACE },
         { TYPE_ACPI_DEV_AML_IF },
         { }
diff --git a/hw/isa/fdc37m81x-superio.c b/hw/isa/fdc37m81x-superio.c
index 55e91fbca1..c2a38f04b1 100644
--- a/hw/isa/fdc37m81x-superio.c
+++ b/hw/isa/fdc37m81x-superio.c
@@ -11,7 +11,7 @@
 #include "qemu/osdep.h"
 #include "hw/isa/superio.h"
 
-static void fdc37m81x_class_init(ObjectClass *klass, void *data)
+static void fdc37m81x_class_init(ObjectClass *klass, const void *data)
 {
     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);
 
diff --git a/hw/isa/i82378.c b/hw/isa/i82378.c
index cbaa152a89..06e8f0ce3e 100644
--- a/hw/isa/i82378.c
+++ b/hw/isa/i82378.c
@@ -122,7 +122,7 @@ static void i82378_init(Object *obj)
     qdev_init_gpio_in(dev, i82378_request_pic_irq, 16);
 }
 
-static void i82378_class_init(ObjectClass *klass, void *data)
+static void i82378_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -142,7 +142,7 @@ static const TypeInfo i82378_type_info = {
     .instance_size = sizeof(I82378State),
     .instance_init = i82378_init,
     .class_init = i82378_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/isa/isa-bus.c b/hw/isa/isa-bus.c
index 2599c1219a..6c9802eb7a 100644
--- a/hw/isa/isa-bus.c
+++ b/hw/isa/isa-bus.c
@@ -29,7 +29,7 @@ static ISABus *isabus;
 
 static char *isabus_get_fw_dev_path(DeviceState *dev);
 
-static void isa_bus_class_init(ObjectClass *klass, void *data)
+static void isa_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
@@ -205,7 +205,7 @@ ISADevice *isa_vga_init(ISABus *bus)
     }
 }
 
-static void isabus_bridge_class_init(ObjectClass *klass, void *data)
+static void isabus_bridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -220,7 +220,7 @@ static const TypeInfo isabus_bridge_info = {
     .class_init    = isabus_bridge_class_init,
 };
 
-static void isa_device_class_init(ObjectClass *klass, void *data)
+static void isa_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->bus_type = TYPE_ISA_BUS;
diff --git a/hw/isa/isa-superio.c b/hw/isa/isa-superio.c
index 4260da547c..2853485977 100644
--- a/hw/isa/isa-superio.c
+++ b/hw/isa/isa-superio.c
@@ -172,7 +172,7 @@ static void isa_superio_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void isa_superio_class_init(ObjectClass *oc, void *data)
+static void isa_superio_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index dcb0ac2848..71afb45b63 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -875,7 +875,7 @@ static void build_ich9_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
     qbus_build_aml(bus, scope);
 }
 
-static void ich9_lpc_class_init(ObjectClass *klass, void *data)
+static void ich9_lpc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -915,7 +915,7 @@ static const TypeInfo ich9_lpc_info = {
     .instance_size = sizeof(ICH9LPCState),
     .instance_init = ich9_lpc_initfn,
     .class_init  = ich9_lpc_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { TYPE_ACPI_DEVICE_IF },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
diff --git a/hw/isa/pc87312.c b/hw/isa/pc87312.c
index 5f5868442a..388da8f590 100644
--- a/hw/isa/pc87312.c
+++ b/hw/isa/pc87312.c
@@ -332,7 +332,7 @@ static const Property pc87312_properties[] = {
     DEFINE_PROP_UINT8("config", PC87312State, config, 1),
 };
 
-static void pc87312_class_init(ObjectClass *klass, void *data)
+static void pc87312_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);
diff --git a/hw/isa/piix.c b/hw/isa/piix.c
index 7fc9e3ec9d..52c14d3cd5 100644
--- a/hw/isa/piix.c
+++ b/hw/isa/piix.c
@@ -417,7 +417,7 @@ static const Property pci_piix_props[] = {
     DEFINE_PROP_BOOL("smm-enabled", PIIXState, smm_enabled, false),
 };
 
-static void pci_piix_class_init(ObjectClass *klass, void *data)
+static void pci_piix_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -445,7 +445,7 @@ static const TypeInfo piix_pci_type_info = {
     .instance_init = pci_piix_init,
     .abstract = true,
     .class_init = pci_piix_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { TYPE_ACPI_DEV_AML_IF },
         { },
@@ -464,7 +464,7 @@ static void piix3_init(Object *obj)
     object_initialize_child(obj, "ide", &d->ide, TYPE_PIIX3_IDE);
 }
 
-static void piix3_class_init(ObjectClass *klass, void *data)
+static void piix3_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -494,7 +494,7 @@ static void piix4_init(Object *obj)
     object_initialize_child(obj, "ide", &s->ide, TYPE_PIIX4_IDE);
 }
 
-static void piix4_class_init(ObjectClass *klass, void *data)
+static void piix4_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/isa/smc37c669-superio.c b/hw/isa/smc37c669-superio.c
index d2e58c9a89..0ec63f520c 100644
--- a/hw/isa/smc37c669-superio.c
+++ b/hw/isa/smc37c669-superio.c
@@ -58,7 +58,7 @@ static unsigned int get_fdc_dma(ISASuperIODevice *sio, uint8_t index)
     return 2;
 }
 
-static void smc37c669_class_init(ObjectClass *klass, void *data)
+static void smc37c669_class_init(ObjectClass *klass, const void *data)
 {
     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);
 
diff --git a/hw/isa/vt82c686.c b/hw/isa/vt82c686.c
index 43bd67eeef..337958617a 100644
--- a/hw/isa/vt82c686.c
+++ b/hw/isa/vt82c686.c
@@ -220,7 +220,7 @@ typedef struct via_pm_init_info {
     uint16_t device_id;
 } ViaPMInitInfo;
 
-static void via_pm_class_init(ObjectClass *klass, void *data)
+static void via_pm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -243,7 +243,7 @@ static const TypeInfo via_pm_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(ViaPMState),
     .abstract      = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -259,7 +259,7 @@ static const TypeInfo vt82c686b_pm_info = {
     .name          = TYPE_VT82C686B_PM,
     .parent        = TYPE_VIA_PM,
     .class_init    = via_pm_class_init,
-    .class_data    = (void *)&vt82c686b_pm_init_info,
+    .class_data    = &vt82c686b_pm_init_info,
 };
 
 static const ViaPMInitInfo vt8231_pm_init_info = {
@@ -272,7 +272,7 @@ static const TypeInfo vt8231_pm_info = {
     .name          = TYPE_VT8231_PM,
     .parent        = TYPE_VIA_PM,
     .class_init    = via_pm_class_init,
-    .class_data    = (void *)&vt8231_pm_init_info,
+    .class_data    = &vt8231_pm_init_info,
 };
 
 
@@ -337,7 +337,7 @@ static void via_superio_devices_enable(ViaSuperIOState *s, uint8_t data)
     isa_fdc_set_enabled(s->superio.floppy, data & BIT(4));
 }
 
-static void via_superio_class_init(ObjectClass *klass, void *data)
+static void via_superio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);
@@ -456,7 +456,7 @@ static void vt82c686b_superio_init(Object *obj)
     VIA_SUPERIO(obj)->io_ops = &vt82c686b_superio_cfg_ops;
 }
 
-static void vt82c686b_superio_class_init(ObjectClass *klass, void *data)
+static void vt82c686b_superio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);
@@ -565,7 +565,7 @@ static void vt8231_superio_init(Object *obj)
     VIA_SUPERIO(obj)->io_ops = &vt8231_superio_cfg_ops;
 }
 
-static void vt8231_superio_class_init(ObjectClass *klass, void *data)
+static void vt8231_superio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);
@@ -634,7 +634,7 @@ static const TypeInfo via_isa_info = {
     .instance_size = sizeof(ViaISAState),
     .instance_init = via_isa_init,
     .abstract      = true,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -833,7 +833,7 @@ static void vt82c686b_init(Object *obj)
     object_initialize_child(obj, "pm", &s->pm, TYPE_VT82C686B_PM);
 }
 
-static void vt82c686b_class_init(ObjectClass *klass, void *data)
+static void vt82c686b_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -898,7 +898,7 @@ static void vt8231_init(Object *obj)
     object_initialize_child(obj, "pm", &s->pm, TYPE_VT8231_PM);
 }
 
-static void vt8231_class_init(ObjectClass *klass, void *data)
+static void vt8231_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index aaaea64c4c..779544fada 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -1133,7 +1133,7 @@ static int64_t virt_get_default_cpu_node_id(const MachineState *ms, int idx)
     }
 }
 
-static void virt_class_init(ObjectClass *oc, void *data)
+static void virt_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
@@ -1186,7 +1186,7 @@ static const TypeInfo virt_machine_types[] = {
         .instance_size  = sizeof(LoongArchVirtMachineState),
         .class_init     = virt_class_init,
         .instance_init  = virt_initfn,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
          { TYPE_HOTPLUG_HANDLER },
          { }
         },
diff --git a/hw/m68k/mcf5206.c b/hw/m68k/mcf5206.c
index c22e615f7a..a25e782403 100644
--- a/hw/m68k/mcf5206.c
+++ b/hw/m68k/mcf5206.c
@@ -605,7 +605,7 @@ static const Property mcf5206_mbar_properties[] = {
                      TYPE_M68K_CPU, M68kCPU *),
 };
 
-static void mcf5206_mbar_class_init(ObjectClass *oc, void *data)
+static void mcf5206_mbar_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/m68k/mcf_intc.c b/hw/m68k/mcf_intc.c
index 7b9213947d..e3055b841e 100644
--- a/hw/m68k/mcf_intc.c
+++ b/hw/m68k/mcf_intc.c
@@ -182,7 +182,7 @@ static const Property mcf_intc_properties[] = {
                      TYPE_M68K_CPU, M68kCPU *),
 };
 
-static void mcf_intc_class_init(ObjectClass *oc, void *data)
+static void mcf_intc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/m68k/next-cube.c b/hw/m68k/next-cube.c
index 1d5925c17b..957644b2d1 100644
--- a/hw/m68k/next-cube.c
+++ b/hw/m68k/next-cube.c
@@ -794,7 +794,7 @@ static const VMStateDescription next_scsi_vmstate = {
     },
 };
 
-static void next_scsi_class_init(ObjectClass *klass, void *data)
+static void next_scsi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1064,7 +1064,7 @@ static const VMStateDescription next_rtc_vmstate = {
     },
 };
 
-static void next_rtc_class_init(ObjectClass *klass, void *data)
+static void next_rtc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -1228,7 +1228,7 @@ static const VMStateDescription next_pc_vmstate = {
     },
 };
 
-static void next_pc_class_init(ObjectClass *klass, void *data)
+static void next_pc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -1348,7 +1348,7 @@ static void next_cube_init(MachineState *machine)
     memory_region_add_subregion(sysmem, 0x02000000, &m->dmamem);
 }
 
-static void next_machine_class_init(ObjectClass *oc, void *data)
+static void next_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/m68k/next-kbd.c b/hw/m68k/next-kbd.c
index 68b17786b2..2bec945acf 100644
--- a/hw/m68k/next-kbd.c
+++ b/hw/m68k/next-kbd.c
@@ -312,7 +312,7 @@ static const VMStateDescription nextkbd_vmstate = {
     .unmigratable = 1,    /* TODO: Implement this when m68k CPU is migratable */
 };
 
-static void nextkbd_class_init(ObjectClass *oc, void *data)
+static void nextkbd_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/m68k/q800-glue.c b/hw/m68k/q800-glue.c
index 168665b382..36de67c328 100644
--- a/hw/m68k/q800-glue.c
+++ b/hw/m68k/q800-glue.c
@@ -228,7 +228,7 @@ static void glue_init(Object *obj)
     s->nmi_release = timer_new_ms(QEMU_CLOCK_VIRTUAL, glue_nmi_release, s);
 }
 
-static void glue_class_init(ObjectClass *klass, void *data)
+static void glue_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -248,7 +248,7 @@ static const TypeInfo glue_info_types[] = {
         .instance_init = glue_init,
         .instance_finalize = glue_finalize,
         .class_init = glue_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
              { TYPE_NMI },
              { }
         },
diff --git a/hw/m68k/q800.c b/hw/m68k/q800.c
index 46435238d2..793b23f815 100644
--- a/hw/m68k/q800.c
+++ b/hw/m68k/q800.c
@@ -727,7 +727,7 @@ static GlobalProperty hw_compat_q800[] = {
 };
 static const size_t hw_compat_q800_len = G_N_ELEMENTS(hw_compat_q800);
 
-static void q800_machine_class_init(ObjectClass *oc, void *data)
+static void q800_machine_class_init(ObjectClass *oc, const void *data)
 {
     static const char * const valid_cpu_types[] = {
         M68K_CPU_TYPE_NAME("m68040"),
diff --git a/hw/m68k/virt.c b/hw/m68k/virt.c
index e74d709a18..875fd00ef8 100644
--- a/hw/m68k/virt.c
+++ b/hw/m68k/virt.c
@@ -310,7 +310,7 @@ static void virt_init(MachineState *machine)
     }
 }
 
-static void virt_machine_class_init(ObjectClass *oc, void *data)
+static void virt_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     mc->desc = "QEMU M68K Virtual Machine";
@@ -339,7 +339,7 @@ type_init(virt_machine_register_types)
 #define DEFINE_VIRT_MACHINE_IMPL(latest, ...) \
     static void MACHINE_VER_SYM(class_init, virt, __VA_ARGS__)( \
         ObjectClass *oc, \
-        void *data) \
+        const void *data) \
     { \
         MachineClass *mc = MACHINE_CLASS(oc); \
         MACHINE_VER_SYM(options, virt, __VA_ARGS__)(mc); \
diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c
index 43aa02ab2a..bba923f8ea 100644
--- a/hw/mem/cxl_type3.c
+++ b/hw/mem/cxl_type3.c
@@ -2141,7 +2141,7 @@ void qmp_cxl_release_dynamic_capacity(const char *path, uint16_t host_id,
     }
 }
 
-static void ct3_class_init(ObjectClass *oc, void *data)
+static void ct3_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
@@ -2174,7 +2174,7 @@ static const TypeInfo ct3d_info = {
     .class_size = sizeof(struct CXLType3Class),
     .class_init = ct3_class_init,
     .instance_size = sizeof(CXLType3Dev),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CXL_DEVICE },
         { INTERFACE_PCIE_DEVICE },
         {}
diff --git a/hw/mem/npcm7xx_mc.c b/hw/mem/npcm7xx_mc.c
index abc5af5620..07fc108e0a 100644
--- a/hw/mem/npcm7xx_mc.c
+++ b/hw/mem/npcm7xx_mc.c
@@ -65,7 +65,7 @@ static void npcm7xx_mc_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->mmio);
 }
 
-static void npcm7xx_mc_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_mc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/mem/nvdimm.c b/hw/mem/nvdimm.c
index c05007ab21..23ab143ef8 100644
--- a/hw/mem/nvdimm.c
+++ b/hw/mem/nvdimm.c
@@ -250,7 +250,7 @@ static const Property nvdimm_properties[] = {
     DEFINE_PROP_BOOL(NVDIMM_UNARMED_PROP, NVDIMMDevice, unarmed, false),
 };
 
-static void nvdimm_class_init(ObjectClass *oc, void *data)
+static void nvdimm_class_init(ObjectClass *oc, const void *data)
 {
     PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
     MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 799a618c1c..f701d5b5f9 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -276,7 +276,7 @@ static void pc_dimm_md_fill_device_info(const MemoryDeviceState *md,
     }
 }
 
-static void pc_dimm_class_init(ObjectClass *oc, void *data)
+static void pc_dimm_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
@@ -301,7 +301,7 @@ static const TypeInfo pc_dimm_info = {
     .instance_init = pc_dimm_init,
     .class_init    = pc_dimm_class_init,
     .class_size    = sizeof(PCDIMMDeviceClass),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_MEMORY_DEVICE },
         { }
     },
diff --git a/hw/mem/sparse-mem.c b/hw/mem/sparse-mem.c
index 8bed5dbe16..d7b00e563a 100644
--- a/hw/mem/sparse-mem.c
+++ b/hw/mem/sparse-mem.c
@@ -136,7 +136,7 @@ static void sparse_mem_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &s->mmio);
 }
 
-static void sparse_mem_class_init(ObjectClass *klass, void *data)
+static void sparse_mem_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/microblaze/boot.c b/hw/microblaze/boot.c
index 60b4ef0abe..4a9c9df318 100644
--- a/hw/microblaze/boot.c
+++ b/hw/microblaze/boot.c
@@ -130,7 +130,7 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, bool is_little_endian,
     dtb_arg = current_machine->dtb;
     /* default to pcbios dtb as passed by machine_init */
     if (!dtb_arg && dtb_filename) {
-        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
+        filename = qemu_find_file(QEMU_FILE_TYPE_DTB, dtb_filename);
     }
 
     boot_info.machine_cpu_reset = machine_cpu_reset;
diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
index c887c7a99e..bea6b689fd 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -218,12 +218,12 @@ petalogix_ml605_init(MachineState *machine)
 
 static void petalogix_ml605_machine_init(MachineClass *mc)
 {
-#if TARGET_BIG_ENDIAN
-    mc->desc = "PetaLogix linux refdesign for xilinx ml605 (big endian)";
-    mc->deprecation_reason = "big endian support is not tested";
-#else
-    mc->desc = "PetaLogix linux refdesign for xilinx ml605 (little endian)";
-#endif
+    if (TARGET_BIG_ENDIAN) {
+        mc->desc = "PetaLogix linux refdesign for xilinx ml605 (big endian)";
+        mc->deprecation_reason = "big endian support is not tested";
+    } else {
+        mc->desc = "PetaLogix linux refdesign for xilinx ml605 (little endian)";
+    }
     mc->init = petalogix_ml605_init;
 }
 
diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
index f976c90bd2..032f6f70ea 100644
--- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
+++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
@@ -141,7 +141,8 @@ petalogix_s3adsp1800_init(MachineState *machine)
                            NULL);
 }
 
-static void petalogix_s3adsp1800_machine_class_init(ObjectClass *oc, void *data)
+static void petalogix_s3adsp1800_machine_class_init(ObjectClass *oc,
+                                                    const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/microblaze/xlnx-zynqmp-pmu.c b/hw/microblaze/xlnx-zynqmp-pmu.c
index 0922c65295..ed40b5f2e0 100644
--- a/hw/microblaze/xlnx-zynqmp-pmu.c
+++ b/hw/microblaze/xlnx-zynqmp-pmu.c
@@ -121,7 +121,7 @@ static void xlnx_zynqmp_pmu_soc_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void xlnx_zynqmp_pmu_soc_class_init(ObjectClass *oc, void *data)
+static void xlnx_zynqmp_pmu_soc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -181,12 +181,12 @@ static void xlnx_zynqmp_pmu_init(MachineState *machine)
 
 static void xlnx_zynqmp_pmu_machine_init(MachineClass *mc)
 {
-#if TARGET_BIG_ENDIAN
-    mc->desc = "Xilinx ZynqMP PMU machine (big endian)";
-    mc->deprecation_reason = "big endian support is not tested";
-#else
-    mc->desc = "Xilinx ZynqMP PMU machine (little endian)";
-#endif
+    if (TARGET_BIG_ENDIAN) {
+        mc->desc = "Xilinx ZynqMP PMU machine (big endian)";
+        mc->deprecation_reason = "big endian support is not tested";
+    } else {
+        mc->desc = "Xilinx ZynqMP PMU machine (little endian)";
+    }
     mc->init = xlnx_zynqmp_pmu_init;
 }
 
diff --git a/hw/mips/cps.c b/hw/mips/cps.c
index 0d8cbdc892..2a3ba3f58d 100644
--- a/hw/mips/cps.c
+++ b/hw/mips/cps.c
@@ -173,7 +173,7 @@ static const Property mips_cps_properties[] = {
     DEFINE_PROP_BOOL("cpu-big-endian", MIPSCPSState, cpu_is_bigendian, false),
 };
 
-static void mips_cps_class_init(ObjectClass *klass, void *data)
+static void mips_cps_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/mips/jazz.c b/hw/mips/jazz.c
index 1700c3765d..7fb0b97a38 100644
--- a/hw/mips/jazz.c
+++ b/hw/mips/jazz.c
@@ -59,12 +59,6 @@ enum jazz_model_e {
     JAZZ_PICA61,
 };
 
-#if TARGET_BIG_ENDIAN
-#define BIOS_FILENAME "mips_bios.bin"
-#else
-#define BIOS_FILENAME "mipsel_bios.bin"
-#endif
-
 static void main_cpu_reset(void *opaque)
 {
     MIPSCPU *cpu = opaque;
@@ -168,6 +162,8 @@ static void mips_jazz_init_net(IOMMUMemoryRegion *rc4030_dma_mr,
 static void mips_jazz_init(MachineState *machine,
                            enum jazz_model_e jazz_model)
 {
+    const char *bios_name = TARGET_BIG_ENDIAN ? "mips_bios.bin"
+                                              : "mipsel_bios.bin";
     MemoryRegion *address_space = get_system_memory();
     char *filename;
     int bios_size, n;
@@ -245,7 +241,8 @@ static void mips_jazz_init(MachineState *machine,
     memory_region_add_subregion(address_space, 0xfff00000LL, bios2);
 
     /* load the BIOS image. */
-    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, machine->firmware ?: BIOS_FILENAME);
+    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
+                              machine->firmware ?: bios_name);
     if (filename) {
         bios_size = load_image_targphys(filename, 0xfff00000LL,
                                         MAGNUM_BIOS_SIZE);
@@ -415,7 +412,7 @@ void mips_pica61_init(MachineState *machine)
     mips_jazz_init(machine, JAZZ_PICA61);
 }
 
-static void mips_magnum_class_init(ObjectClass *oc, void *data)
+static void mips_magnum_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -432,7 +429,7 @@ static const TypeInfo mips_magnum_type = {
     .class_init = mips_magnum_class_init,
 };
 
-static void mips_pica61_class_init(ObjectClass *oc, void *data)
+static void mips_pica61_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/mips/loongson3_virt.c b/hw/mips/loongson3_virt.c
index 1da20dccec..de6fbcc0cb 100644
--- a/hw/mips/loongson3_virt.c
+++ b/hw/mips/loongson3_virt.c
@@ -667,7 +667,7 @@ static void mips_loongson3_virt_init(MachineState *machine)
     loongson3_virt_devices_init(machine, liointc);
 }
 
-static void loongson3v_machine_class_init(ObjectClass *oc, void *data)
+static void loongson3v_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/mips/malta.c b/hw/mips/malta.c
index 8e9cea70b1..cbdbb21056 100644
--- a/hw/mips/malta.c
+++ b/hw/mips/malta.c
@@ -94,12 +94,6 @@ typedef struct {
     bool display_inited;
 } MaltaFPGAState;
 
-#if TARGET_BIG_ENDIAN
-#define BIOS_FILENAME "mips_bios.bin"
-#else
-#define BIOS_FILENAME "mipsel_bios.bin"
-#endif
-
 #define TYPE_MIPS_MALTA "mips-malta"
 OBJECT_DECLARE_SIMPLE_TYPE(MaltaState, MIPS_MALTA)
 
@@ -383,11 +377,7 @@ static uint64_t malta_fpga_read(void *opaque, hwaddr addr,
 
     /* STATUS Register */
     case 0x00208:
-#if TARGET_BIG_ENDIAN
-        val = 0x00000012;
-#else
-        val = 0x00000010;
-#endif
+        val = TARGET_BIG_ENDIAN ? 0x00000012 : 0x00000010;
         break;
 
     /* JMPRS Register */
@@ -1177,9 +1167,12 @@ void mips_malta_init(MachineState *machine)
         target_long bios_size = FLASH_SIZE;
         /* Load firmware from flash. */
         if (!dinfo) {
+            const char *bios_name = TARGET_BIG_ENDIAN ? "mips_bios.bin"
+                                                        : "mipsel_bios.bin";
+
             /* Load a BIOS image. */
             filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
-                                      machine->firmware ?: BIOS_FILENAME);
+                                      machine->firmware ?: bios_name);
             if (filename) {
                 bios_size = load_image_targphys(filename, FLASH_ADDRESS,
                                                 BIOS_SIZE);
@@ -1197,8 +1190,7 @@ void mips_malta_init(MachineState *machine)
          * In little endian mode the 32bit words in the bios are swapped,
          * a neat trick which allows bi-endian firmware.
          */
-#if !TARGET_BIG_ENDIAN
-        {
+        if (!TARGET_BIG_ENDIAN) {
             uint32_t *end, *addr;
             const size_t swapsize = MIN(bios_size, 0x3e0000);
             addr = rom_ptr(FLASH_ADDRESS, swapsize);
@@ -1211,7 +1203,6 @@ void mips_malta_init(MachineState *machine)
                 addr++;
             }
         }
-#endif
     }
 
     /*
diff --git a/hw/mips/mipssim.c b/hw/mips/mipssim.c
index b6dabf2893..e843307b9b 100644
--- a/hw/mips/mipssim.c
+++ b/hw/mips/mipssim.c
@@ -46,12 +46,6 @@
 
 #define BIOS_SIZE (4 * MiB)
 
-#if TARGET_BIG_ENDIAN
-#define BIOS_FILENAME "mips_bios.bin"
-#else
-#define BIOS_FILENAME "mipsel_bios.bin"
-#endif
-
 static struct _loaderparams {
     int ram_size;
     const char *kernel_filename;
@@ -143,6 +137,8 @@ mips_mipssim_init(MachineState *machine)
     const char *kernel_filename = machine->kernel_filename;
     const char *kernel_cmdline = machine->kernel_cmdline;
     const char *initrd_filename = machine->initrd_filename;
+    const char *bios_name = TARGET_BIG_ENDIAN ? "mips_bios.bin"
+                                              : "mipsel_bios.bin";
     char *filename;
     MemoryRegion *address_space_mem = get_system_memory();
     MemoryRegion *isa = g_new(MemoryRegion, 1);
@@ -179,7 +175,8 @@ mips_mipssim_init(MachineState *machine)
     /* Map the BIOS / boot exception handler. */
     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
     /* Load a BIOS / boot exception handler image. */
-    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, machine->firmware ?: BIOS_FILENAME);
+    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
+                              machine->firmware ?: bios_name);
     if (filename) {
         bios_size = load_image_targphys(filename, 0x1fc00000LL, BIOS_SIZE);
         g_free(filename);
diff --git a/hw/misc/a9scu.c b/hw/misc/a9scu.c
index 088d4adb0d..bb00ae2969 100644
--- a/hw/misc/a9scu.c
+++ b/hw/misc/a9scu.c
@@ -127,7 +127,7 @@ static const Property a9_scu_properties[] = {
     DEFINE_PROP_UINT32("num-cpu", A9SCUState, num_cpu, 1),
 };
 
-static void a9_scu_class_init(ObjectClass *klass, void *data)
+static void a9_scu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/allwinner-a10-ccm.c b/hw/misc/allwinner-a10-ccm.c
index 6ca1daaff8..6b188c25a5 100644
--- a/hw/misc/allwinner-a10-ccm.c
+++ b/hw/misc/allwinner-a10-ccm.c
@@ -199,7 +199,7 @@ static const VMStateDescription allwinner_a10_ccm_vmstate = {
     }
 };
 
-static void allwinner_a10_ccm_class_init(ObjectClass *klass, void *data)
+static void allwinner_a10_ccm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/misc/allwinner-a10-dramc.c b/hw/misc/allwinner-a10-dramc.c
index badc4c56eb..c16814cc5b 100644
--- a/hw/misc/allwinner-a10-dramc.c
+++ b/hw/misc/allwinner-a10-dramc.c
@@ -154,7 +154,7 @@ static const VMStateDescription allwinner_a10_dramc_vmstate = {
     }
 };
 
-static void allwinner_a10_dramc_class_init(ObjectClass *klass, void *data)
+static void allwinner_a10_dramc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/misc/allwinner-cpucfg.c b/hw/misc/allwinner-cpucfg.c
index a4f7a01141..90dd872abf 100644
--- a/hw/misc/allwinner-cpucfg.c
+++ b/hw/misc/allwinner-cpucfg.c
@@ -258,7 +258,7 @@ static const VMStateDescription allwinner_cpucfg_vmstate = {
     }
 };
 
-static void allwinner_cpucfg_class_init(ObjectClass *klass, void *data)
+static void allwinner_cpucfg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/allwinner-h3-ccu.c b/hw/misc/allwinner-h3-ccu.c
index e765f4c54b..be91c0c1ca 100644
--- a/hw/misc/allwinner-h3-ccu.c
+++ b/hw/misc/allwinner-h3-ccu.c
@@ -218,7 +218,7 @@ static const VMStateDescription allwinner_h3_ccu_vmstate = {
     }
 };
 
-static void allwinner_h3_ccu_class_init(ObjectClass *klass, void *data)
+static void allwinner_h3_ccu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/allwinner-h3-dramc.c b/hw/misc/allwinner-h3-dramc.c
index 74ff71b753..8834524c30 100644
--- a/hw/misc/allwinner-h3-dramc.c
+++ b/hw/misc/allwinner-h3-dramc.c
@@ -331,7 +331,7 @@ static const VMStateDescription allwinner_h3_dramc_vmstate = {
     }
 };
 
-static void allwinner_h3_dramc_class_init(ObjectClass *klass, void *data)
+static void allwinner_h3_dramc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/allwinner-h3-sysctrl.c b/hw/misc/allwinner-h3-sysctrl.c
index 32a0ceb01a..6b86524606 100644
--- a/hw/misc/allwinner-h3-sysctrl.c
+++ b/hw/misc/allwinner-h3-sysctrl.c
@@ -116,7 +116,8 @@ static const VMStateDescription allwinner_h3_sysctrl_vmstate = {
     }
 };
 
-static void allwinner_h3_sysctrl_class_init(ObjectClass *klass, void *data)
+static void allwinner_h3_sysctrl_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/allwinner-r40-ccu.c b/hw/misc/allwinner-r40-ccu.c
index 8f37a9213c..4e21eeafdd 100644
--- a/hw/misc/allwinner-r40-ccu.c
+++ b/hw/misc/allwinner-r40-ccu.c
@@ -185,7 +185,7 @@ static const VMStateDescription allwinner_r40_ccu_vmstate = {
     }
 };
 
-static void allwinner_r40_ccu_class_init(ObjectClass *klass, void *data)
+static void allwinner_r40_ccu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/allwinner-r40-dramc.c b/hw/misc/allwinner-r40-dramc.c
index 5908a059e8..1c8e17e3c0 100644
--- a/hw/misc/allwinner-r40-dramc.c
+++ b/hw/misc/allwinner-r40-dramc.c
@@ -484,7 +484,7 @@ static const VMStateDescription allwinner_r40_dramc_vmstate = {
     }
 };
 
-static void allwinner_r40_dramc_class_init(ObjectClass *klass, void *data)
+static void allwinner_r40_dramc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/allwinner-sid.c b/hw/misc/allwinner-sid.c
index 2bb81f9c54..1e66c14567 100644
--- a/hw/misc/allwinner-sid.c
+++ b/hw/misc/allwinner-sid.c
@@ -143,7 +143,7 @@ static const VMStateDescription allwinner_sid_vmstate = {
     }
 };
 
-static void allwinner_sid_class_init(ObjectClass *klass, void *data)
+static void allwinner_sid_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/allwinner-sramc.c b/hw/misc/allwinner-sramc.c
index 51df5e45aa..ed299ecaae 100644
--- a/hw/misc/allwinner-sramc.c
+++ b/hw/misc/allwinner-sramc.c
@@ -135,7 +135,7 @@ static void allwinner_sramc_reset(DeviceState *dev)
     }
 }
 
-static void allwinner_sramc_class_init(ObjectClass *klass, void *data)
+static void allwinner_sramc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -163,7 +163,7 @@ static const TypeInfo allwinner_sramc_info = {
     .class_init    = allwinner_sramc_class_init,
 };
 
-static void allwinner_r40_sramc_class_init(ObjectClass *klass, void *data)
+static void allwinner_r40_sramc_class_init(ObjectClass *klass, const void *data)
 {
     AwSRAMCClass *sc = AW_SRAMC_CLASS(klass);
 
diff --git a/hw/misc/applesmc.c b/hw/misc/applesmc.c
index 97ea842d60..a015d4a9b8 100644
--- a/hw/misc/applesmc.c
+++ b/hw/misc/applesmc.c
@@ -375,7 +375,7 @@ static void build_applesmc_aml(AcpiDevAmlIf *adev, Aml *scope)
     aml_append(scope, dev);
 }
 
-static void qdev_applesmc_class_init(ObjectClass *klass, void *data)
+static void qdev_applesmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
@@ -393,7 +393,7 @@ static const TypeInfo applesmc_isa_info = {
     .parent        = TYPE_ISA_DEVICE,
     .instance_size = sizeof(AppleSMCState),
     .class_init    = qdev_applesmc_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
diff --git a/hw/misc/arm11scu.c b/hw/misc/arm11scu.c
index 02493cec31..2ad4fd1d21 100644
--- a/hw/misc/arm11scu.c
+++ b/hw/misc/arm11scu.c
@@ -79,7 +79,7 @@ static const Property arm11_scu_properties[] = {
     DEFINE_PROP_UINT32("num-cpu", ARM11SCUState, num_cpu, 1),
 };
 
-static void arm11_scu_class_init(ObjectClass *oc, void *data)
+static void arm11_scu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/misc/arm_l2x0.c b/hw/misc/arm_l2x0.c
index 39b4642da7..8b4b61eed0 100644
--- a/hw/misc/arm_l2x0.c
+++ b/hw/misc/arm_l2x0.c
@@ -177,7 +177,7 @@ static const Property l2x0_properties[] = {
     DEFINE_PROP_UINT32("cache-type", L2x0State, cache_type, 0x1c100100),
 };
 
-static void l2x0_class_init(ObjectClass *klass, void *data)
+static void l2x0_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/arm_sysctl.c b/hw/misc/arm_sysctl.c
index 01663407ec..0f4e37cd47 100644
--- a/hw/misc/arm_sysctl.c
+++ b/hw/misc/arm_sysctl.c
@@ -634,7 +634,7 @@ static const Property arm_sysctl_properties[] = {
                       db_clock_reset, qdev_prop_uint32, uint32_t),
 };
 
-static void arm_sysctl_class_init(ObjectClass *klass, void *data)
+static void arm_sysctl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/armsse-cpu-pwrctrl.c b/hw/misc/armsse-cpu-pwrctrl.c
index 2d3a0ac29c..66e9218f27 100644
--- a/hw/misc/armsse-cpu-pwrctrl.c
+++ b/hw/misc/armsse-cpu-pwrctrl.c
@@ -125,7 +125,7 @@ static void pwrctrl_init(Object *obj)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void pwrctrl_class_init(ObjectClass *klass, void *data)
+static void pwrctrl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/armsse-cpuid.c b/hw/misc/armsse-cpuid.c
index 58cb37333f..a57764d731 100644
--- a/hw/misc/armsse-cpuid.c
+++ b/hw/misc/armsse-cpuid.c
@@ -106,7 +106,7 @@ static void armsse_cpuid_init(Object *obj)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void armsse_cpuid_class_init(ObjectClass *klass, void *data)
+static void armsse_cpuid_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/armsse-mhu.c b/hw/misc/armsse-mhu.c
index 91c49108b0..d5d307a186 100644
--- a/hw/misc/armsse-mhu.c
+++ b/hw/misc/armsse-mhu.c
@@ -176,7 +176,7 @@ static void armsse_mhu_init(Object *obj)
     sysbus_init_irq(sbd, &s->cpu1irq);
 }
 
-static void armsse_mhu_class_init(ObjectClass *klass, void *data)
+static void armsse_mhu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/armv7m_ras.c b/hw/misc/armv7m_ras.c
index de24922c94..7bf5acd0a5 100644
--- a/hw/misc/armv7m_ras.c
+++ b/hw/misc/armv7m_ras.c
@@ -72,7 +72,7 @@ static void armv7m_ras_init(Object *obj)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void armv7m_ras_class_init(ObjectClass *klass, void *data)
+static void armv7m_ras_class_init(ObjectClass *klass, const void *data)
 {
     /* This device has no state: no need for vmstate or reset */
 }
diff --git a/hw/misc/aspeed_hace.c b/hw/misc/aspeed_hace.c
index d75da33353..f4bff32a00 100644
--- a/hw/misc/aspeed_hace.c
+++ b/hw/misc/aspeed_hace.c
@@ -479,7 +479,7 @@ static const VMStateDescription vmstate_aspeed_hace = {
     }
 };
 
-static void aspeed_hace_class_init(ObjectClass *klass, void *data)
+static void aspeed_hace_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -497,7 +497,7 @@ static const TypeInfo aspeed_hace_info = {
     .class_size = sizeof(AspeedHACEClass)
 };
 
-static void aspeed_ast2400_hace_class_init(ObjectClass *klass, void *data)
+static void aspeed_ast2400_hace_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedHACEClass *ahc = ASPEED_HACE_CLASS(klass);
@@ -516,7 +516,7 @@ static const TypeInfo aspeed_ast2400_hace_info = {
     .class_init = aspeed_ast2400_hace_class_init,
 };
 
-static void aspeed_ast2500_hace_class_init(ObjectClass *klass, void *data)
+static void aspeed_ast2500_hace_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedHACEClass *ahc = ASPEED_HACE_CLASS(klass);
@@ -535,7 +535,7 @@ static const TypeInfo aspeed_ast2500_hace_info = {
     .class_init = aspeed_ast2500_hace_class_init,
 };
 
-static void aspeed_ast2600_hace_class_init(ObjectClass *klass, void *data)
+static void aspeed_ast2600_hace_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedHACEClass *ahc = ASPEED_HACE_CLASS(klass);
@@ -554,7 +554,7 @@ static const TypeInfo aspeed_ast2600_hace_info = {
     .class_init = aspeed_ast2600_hace_class_init,
 };
 
-static void aspeed_ast1030_hace_class_init(ObjectClass *klass, void *data)
+static void aspeed_ast1030_hace_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedHACEClass *ahc = ASPEED_HACE_CLASS(klass);
@@ -573,7 +573,7 @@ static const TypeInfo aspeed_ast1030_hace_info = {
     .class_init = aspeed_ast1030_hace_class_init,
 };
 
-static void aspeed_ast2700_hace_class_init(ObjectClass *klass, void *data)
+static void aspeed_ast2700_hace_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedHACEClass *ahc = ASPEED_HACE_CLASS(klass);
diff --git a/hw/misc/aspeed_i3c.c b/hw/misc/aspeed_i3c.c
index ab39c6435b..3bef1c84dd 100644
--- a/hw/misc/aspeed_i3c.c
+++ b/hw/misc/aspeed_i3c.c
@@ -327,7 +327,7 @@ static const Property aspeed_i3c_device_properties[] = {
     DEFINE_PROP_UINT8("device-id", AspeedI3CDevice, id, 0),
 };
 
-static void aspeed_i3c_device_class_init(ObjectClass *klass, void *data)
+static void aspeed_i3c_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -356,7 +356,7 @@ static const VMStateDescription vmstate_aspeed_i3c = {
     }
 };
 
-static void aspeed_i3c_class_init(ObjectClass *klass, void *data)
+static void aspeed_i3c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/aspeed_lpc.c b/hw/misc/aspeed_lpc.c
index 228d250dc0..78406dae24 100644
--- a/hw/misc/aspeed_lpc.c
+++ b/hw/misc/aspeed_lpc.c
@@ -458,7 +458,7 @@ static const Property aspeed_lpc_properties[] = {
     DEFINE_PROP_UINT32("hicr7", AspeedLPCState, hicr7, 0),
 };
 
-static void aspeed_lpc_class_init(ObjectClass *klass, void *data)
+static void aspeed_lpc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/aspeed_peci.c b/hw/misc/aspeed_peci.c
index 9025b35f83..a7a449a923 100644
--- a/hw/misc/aspeed_peci.c
+++ b/hw/misc/aspeed_peci.c
@@ -130,7 +130,7 @@ static void aspeed_peci_reset(DeviceState *dev)
     memset(s->regs, 0, sizeof(s->regs));
 }
 
-static void aspeed_peci_class_init(ObjectClass *klass, void *data)
+static void aspeed_peci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/aspeed_sbc.c b/hw/misc/aspeed_sbc.c
index e4a6bd1581..a7d101ba71 100644
--- a/hw/misc/aspeed_sbc.c
+++ b/hw/misc/aspeed_sbc.c
@@ -141,7 +141,7 @@ static const Property aspeed_sbc_properties[] = {
     DEFINE_PROP_UINT32("signing-settings", AspeedSBCState, signing_settings, 0),
 };
 
-static void aspeed_sbc_class_init(ObjectClass *klass, void *data)
+static void aspeed_sbc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -159,7 +159,7 @@ static const TypeInfo aspeed_sbc_info = {
     .class_size = sizeof(AspeedSBCClass)
 };
 
-static void aspeed_ast2600_sbc_class_init(ObjectClass *klass, void *data)
+static void aspeed_ast2600_sbc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/aspeed_scu.c b/hw/misc/aspeed_scu.c
index 1af1a35a08..4930e00fed 100644
--- a/hw/misc/aspeed_scu.c
+++ b/hw/misc/aspeed_scu.c
@@ -618,7 +618,7 @@ static const Property aspeed_scu_properties[] = {
     DEFINE_PROP_UINT32("hw-prot-key", AspeedSCUState, hw_prot_key, 0),
 };
 
-static void aspeed_scu_class_init(ObjectClass *klass, void *data)
+static void aspeed_scu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = aspeed_scu_realize;
@@ -637,7 +637,7 @@ static const TypeInfo aspeed_scu_info = {
     .abstract      = true,
 };
 
-static void aspeed_2400_scu_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_scu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
@@ -659,7 +659,7 @@ static const TypeInfo aspeed_2400_scu_info = {
     .class_init = aspeed_2400_scu_class_init,
 };
 
-static void aspeed_2500_scu_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_scu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
@@ -835,7 +835,7 @@ static void aspeed_ast2600_scu_reset(DeviceState *dev)
     s->regs[PROT_KEY] = s->hw_prot_key;
 }
 
-static void aspeed_2600_scu_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_scu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
@@ -954,7 +954,7 @@ static void aspeed_ast2700_scu_reset(DeviceState *dev)
     s->regs[AST2700_HW_STRAP1] = s->hw_strap1;
 }
 
-static void aspeed_2700_scu_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_scu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
@@ -1068,7 +1068,7 @@ static const uint32_t ast2700_a0_resets_io[ASPEED_AST2700_SCU_NR_REGS] = {
     [AST2700_SCUIO_CLK_DUTY_MEAS_RST]   = 0x0c9100d2,
 };
 
-static void aspeed_2700_scuio_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_scuio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
@@ -1126,7 +1126,7 @@ static void aspeed_ast1030_scu_reset(DeviceState *dev)
     s->regs[PROT_KEY] = s->hw_prot_key;
 }
 
-static void aspeed_1030_scu_class_init(ObjectClass *klass, void *data)
+static void aspeed_1030_scu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
diff --git a/hw/misc/aspeed_sdmc.c b/hw/misc/aspeed_sdmc.c
index f359640a9a..f04d9930dd 100644
--- a/hw/misc/aspeed_sdmc.c
+++ b/hw/misc/aspeed_sdmc.c
@@ -299,7 +299,7 @@ static const Property aspeed_sdmc_properties[] = {
     DEFINE_PROP_BOOL("unlocked", AspeedSDMCState, unlocked, false),
 };
 
-static void aspeed_sdmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_sdmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = aspeed_sdmc_realize;
@@ -380,7 +380,7 @@ static void aspeed_2400_sdmc_write(AspeedSDMCState *s, uint32_t reg,
 static const uint64_t
 aspeed_2400_ram_sizes[] = { 64 * MiB, 128 * MiB, 256 * MiB, 512 * MiB, 0};
 
-static void aspeed_2400_sdmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_sdmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);
@@ -448,7 +448,7 @@ static void aspeed_2500_sdmc_write(AspeedSDMCState *s, uint32_t reg,
 static const uint64_t
 aspeed_2500_ram_sizes[] = { 128 * MiB, 256 * MiB, 512 * MiB, 1024 * MiB, 0};
 
-static void aspeed_2500_sdmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_sdmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);
@@ -542,7 +542,7 @@ static void aspeed_2600_sdmc_write(AspeedSDMCState *s, uint32_t reg,
 static const uint64_t
 aspeed_2600_ram_sizes[] = { 256 * MiB, 512 * MiB, 1024 * MiB, 2048 * MiB, 0};
 
-static void aspeed_2600_sdmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_sdmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);
@@ -670,7 +670,7 @@ static const uint64_t
     aspeed_2700_ram_sizes[] = { 256 * MiB, 512 * MiB, 1024 * MiB,
                                 2048 * MiB, 4096 * MiB, 8192 * MiB, 0};
 
-static void aspeed_2700_sdmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_sdmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);
diff --git a/hw/misc/aspeed_sli.c b/hw/misc/aspeed_sli.c
index fe720ead50..c51484035e 100644
--- a/hw/misc/aspeed_sli.c
+++ b/hw/misc/aspeed_sli.c
@@ -124,7 +124,7 @@ static void aspeed_sliio_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void aspeed_sli_class_init(ObjectClass *klass, void *data)
+static void aspeed_sli_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -140,14 +140,14 @@ static const TypeInfo aspeed_sli_info = {
     .abstract      = true,
 };
 
-static void aspeed_2700_sli_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_sli_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->desc = "AST2700 SLI Controller";
 }
 
-static void aspeed_2700_sliio_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_sliio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/aspeed_xdma.c b/hw/misc/aspeed_xdma.c
index 1dd32f72f4..cc03c422b0 100644
--- a/hw/misc/aspeed_xdma.c
+++ b/hw/misc/aspeed_xdma.c
@@ -150,7 +150,7 @@ static const VMStateDescription aspeed_xdma_vmstate = {
     },
 };
 
-static void aspeed_2600_xdma_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_xdma_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedXDMAClass *axc = ASPEED_XDMA_CLASS(klass);
@@ -173,7 +173,7 @@ static const TypeInfo aspeed_2600_xdma_info = {
     .class_init = aspeed_2600_xdma_class_init,
 };
 
-static void aspeed_2500_xdma_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_xdma_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedXDMAClass *axc = ASPEED_XDMA_CLASS(klass);
@@ -195,7 +195,7 @@ static const TypeInfo aspeed_2500_xdma_info = {
     .class_init = aspeed_2500_xdma_class_init,
 };
 
-static void aspeed_2400_xdma_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_xdma_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedXDMAClass *axc = ASPEED_XDMA_CLASS(klass);
@@ -217,7 +217,7 @@ static const TypeInfo aspeed_2400_xdma_info = {
     .class_init = aspeed_2400_xdma_class_init,
 };
 
-static void aspeed_xdma_class_init(ObjectClass *classp, void *data)
+static void aspeed_xdma_class_init(ObjectClass *classp, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(classp);
 
diff --git a/hw/misc/auxbus.c b/hw/misc/auxbus.c
index 28d50d9d09..877f345606 100644
--- a/hw/misc/auxbus.c
+++ b/hw/misc/auxbus.c
@@ -50,7 +50,7 @@ static void aux_slave_dev_print(Monitor *mon, DeviceState *dev, int indent);
 static inline I2CBus *aux_bridge_get_i2c_bus(AUXTOI2CState *bridge);
 
 /* aux-bus implementation (internal not public) */
-static void aux_bus_class_init(ObjectClass *klass, void *data)
+static void aux_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
@@ -256,7 +256,7 @@ struct AUXTOI2CState {
     I2CBus *i2c_bus;
 };
 
-static void aux_bridge_class_init(ObjectClass *oc, void *data)
+static void aux_bridge_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -311,7 +311,7 @@ void aux_init_mmio(AUXSlave *aux_slave, MemoryRegion *mmio)
     aux_slave->mmio = mmio;
 }
 
-static void aux_slave_class_init(ObjectClass *klass, void *data)
+static void aux_slave_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/avr_power.c b/hw/misc/avr_power.c
index ac7b96f53e..411f016c99 100644
--- a/hw/misc/avr_power.c
+++ b/hw/misc/avr_power.c
@@ -90,7 +90,7 @@ static void avr_mask_init(Object *dev)
     s->val = 0x00;
 }
 
-static void avr_mask_class_init(ObjectClass *klass, void *data)
+static void avr_mask_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/axp2xx.c b/hw/misc/axp2xx.c
index af646878cd..46d17712dd 100644
--- a/hw/misc/axp2xx.c
+++ b/hw/misc/axp2xx.c
@@ -225,7 +225,7 @@ static const VMStateDescription vmstate_axp2xx = {
     }
 };
 
-static void axp2xx_class_init(ObjectClass *oc, void *data)
+static void axp2xx_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     I2CSlaveClass *isc = I2C_SLAVE_CLASS(oc);
@@ -247,7 +247,7 @@ static const TypeInfo axp2xx_info = {
     .abstract = true,
 };
 
-static void axp209_class_init(ObjectClass *oc, void *data)
+static void axp209_class_init(ObjectClass *oc, const void *data)
 {
     AXP2xxClass *sc = AXP2XX_CLASS(oc);
 
@@ -260,7 +260,7 @@ static const TypeInfo axp209_info = {
     .class_init = axp209_class_init
 };
 
-static void axp221_class_init(ObjectClass *oc, void *data)
+static void axp221_class_init(ObjectClass *oc, const void *data)
 {
     AXP2xxClass *sc = AXP2XX_CLASS(oc);
 
diff --git a/hw/misc/bcm2835_cprman.c b/hw/misc/bcm2835_cprman.c
index 0c4d4b7de5..efe6f900db 100644
--- a/hw/misc/bcm2835_cprman.c
+++ b/hw/misc/bcm2835_cprman.c
@@ -131,7 +131,7 @@ static const VMStateDescription pll_vmstate = {
     }
 };
 
-static void pll_class_init(ObjectClass *klass, void *data)
+static void pll_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -237,7 +237,7 @@ static const VMStateDescription pll_channel_vmstate = {
     }
 };
 
-static void pll_channel_class_init(ObjectClass *klass, void *data)
+static void pll_channel_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -360,7 +360,7 @@ static const VMStateDescription clock_mux_vmstate = {
     }
 };
 
-static void clock_mux_class_init(ObjectClass *klass, void *data)
+static void clock_mux_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -417,7 +417,7 @@ static const VMStateDescription dsi0hsck_mux_vmstate = {
     }
 };
 
-static void dsi0hsck_mux_class_init(ObjectClass *klass, void *data)
+static void dsi0hsck_mux_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -790,7 +790,7 @@ static const Property cprman_properties[] = {
     DEFINE_PROP_UINT32("xosc-freq-hz", BCM2835CprmanState, xosc_freq, 19200000),
 };
 
-static void cprman_class_init(ObjectClass *klass, void *data)
+static void cprman_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/bcm2835_mbox.c b/hw/misc/bcm2835_mbox.c
index ed6dbea191..603eaaa710 100644
--- a/hw/misc/bcm2835_mbox.c
+++ b/hw/misc/bcm2835_mbox.c
@@ -314,7 +314,7 @@ static void bcm2835_mbox_realize(DeviceState *dev, Error **errp)
     bcm2835_mbox_reset(dev);
 }
 
-static void bcm2835_mbox_class_init(ObjectClass *klass, void *data)
+static void bcm2835_mbox_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/bcm2835_mphi.c b/hw/misc/bcm2835_mphi.c
index 7309cf22fc..55d79e7e87 100644
--- a/hw/misc/bcm2835_mphi.c
+++ b/hw/misc/bcm2835_mphi.c
@@ -166,7 +166,7 @@ const VMStateDescription vmstate_mphi_state = {
     }
 };
 
-static void mphi_class_init(ObjectClass *klass, void *data)
+static void mphi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/bcm2835_powermgt.c b/hw/misc/bcm2835_powermgt.c
index e4e9bae374..3ec7abad0e 100644
--- a/hw/misc/bcm2835_powermgt.c
+++ b/hw/misc/bcm2835_powermgt.c
@@ -136,7 +136,7 @@ static void bcm2835_powermgt_reset(DeviceState *dev)
     s->wdog = 0x00000000;
 }
 
-static void bcm2835_powermgt_class_init(ObjectClass *klass, void *data)
+static void bcm2835_powermgt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index 2bae64b64c..a21c6a541c 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -556,7 +556,7 @@ static const Property bcm2835_property_props[] = {
     DEFINE_PROP_STRING("command-line", BCM2835PropertyState, command_line),
 };
 
-static void bcm2835_property_class_init(ObjectClass *klass, void *data)
+static void bcm2835_property_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/bcm2835_rng.c b/hw/misc/bcm2835_rng.c
index 06f40817df..e4d2c224c8 100644
--- a/hw/misc/bcm2835_rng.c
+++ b/hw/misc/bcm2835_rng.c
@@ -123,7 +123,7 @@ static void bcm2835_rng_reset(DeviceState *dev)
     s->rng_status = 0;
 }
 
-static void bcm2835_rng_class_init(ObjectClass *klass, void *data)
+static void bcm2835_rng_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/bcm2835_thermal.c b/hw/misc/bcm2835_thermal.c
index 1c1b0671cc..33bfc91c7a 100644
--- a/hw/misc/bcm2835_thermal.c
+++ b/hw/misc/bcm2835_thermal.c
@@ -113,7 +113,7 @@ static const VMStateDescription bcm2835_thermal_vmstate = {
     }
 };
 
-static void bcm2835_thermal_class_init(ObjectClass *klass, void *data)
+static void bcm2835_thermal_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/debugexit.c b/hw/misc/debugexit.c
index 577b884494..04a9fc3122 100644
--- a/hw/misc/debugexit.c
+++ b/hw/misc/debugexit.c
@@ -61,7 +61,7 @@ static const Property debug_exit_properties[] = {
     DEFINE_PROP_UINT32("iosize", ISADebugExitState, iosize, 0x02),
 };
 
-static void debug_exit_class_initfn(ObjectClass *klass, void *data)
+static void debug_exit_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/djmemc.c b/hw/misc/djmemc.c
index 96d5efb5e3..c5b09f551b 100644
--- a/hw/misc/djmemc.c
+++ b/hw/misc/djmemc.c
@@ -113,7 +113,7 @@ static const VMStateDescription vmstate_djmemc = {
     }
 };
 
-static void djmemc_class_init(ObjectClass *oc, void *data)
+static void djmemc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ResettableClass *rc = RESETTABLE_CLASS(oc);
diff --git a/hw/misc/eccmemctl.c b/hw/misc/eccmemctl.c
index d7452c4cc8..81fc536131 100644
--- a/hw/misc/eccmemctl.c
+++ b/hw/misc/eccmemctl.c
@@ -329,7 +329,7 @@ static const Property ecc_properties[] = {
     DEFINE_PROP_UINT32("version", ECCState, version, -1),
 };
 
-static void ecc_class_init(ObjectClass *klass, void *data)
+static void ecc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/edu.c b/hw/misc/edu.c
index 504178b4a2..cece633e11 100644
--- a/hw/misc/edu.c
+++ b/hw/misc/edu.c
@@ -415,7 +415,7 @@ static void edu_instance_init(Object *obj)
                                    &edu->dma_mask, OBJ_PROP_FLAG_READWRITE);
 }
 
-static void edu_class_init(ObjectClass *class, void *data)
+static void edu_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(class);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(class);
@@ -429,21 +429,18 @@ static void edu_class_init(ObjectClass *class, void *data)
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 }
 
-static void pci_edu_register_types(void)
-{
-    static InterfaceInfo interfaces[] = {
-        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
-        { },
-    };
-    static const TypeInfo edu_info = {
+static const TypeInfo edu_types[] = {
+    {
         .name          = TYPE_PCI_EDU_DEVICE,
         .parent        = TYPE_PCI_DEVICE,
         .instance_size = sizeof(EduState),
         .instance_init = edu_instance_init,
         .class_init    = edu_class_init,
-        .interfaces = interfaces,
-    };
+        .interfaces    = (const InterfaceInfo[]) {
+            { INTERFACE_CONVENTIONAL_PCI_DEVICE },
+            { },
+        },
+    }
+};
 
-    type_register_static(&edu_info);
-}
-type_init(pci_edu_register_types)
+DEFINE_TYPES(edu_types)
diff --git a/hw/misc/empty_slot.c b/hw/misc/empty_slot.c
index 221ea7cb54..239d760320 100644
--- a/hw/misc/empty_slot.c
+++ b/hw/misc/empty_slot.c
@@ -84,7 +84,7 @@ static const Property empty_slot_properties[] = {
     DEFINE_PROP_STRING("name", EmptySlot, name),
 };
 
-static void empty_slot_class_init(ObjectClass *klass, void *data)
+static void empty_slot_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/exynos4210_clk.c b/hw/misc/exynos4210_clk.c
index 886d10bbab..fdf5bdd603 100644
--- a/hw/misc/exynos4210_clk.c
+++ b/hw/misc/exynos4210_clk.c
@@ -141,7 +141,7 @@ static const VMStateDescription exynos4210_clk_vmstate = {
     }
 };
 
-static void exynos4210_clk_class_init(ObjectClass *klass, void *data)
+static void exynos4210_clk_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/exynos4210_pmu.c b/hw/misc/exynos4210_pmu.c
index d44aac3af5..a86ec9aba8 100644
--- a/hw/misc/exynos4210_pmu.c
+++ b/hw/misc/exynos4210_pmu.c
@@ -498,7 +498,7 @@ static const VMStateDescription exynos4210_pmu_vmstate = {
     }
 };
 
-static void exynos4210_pmu_class_init(ObjectClass *klass, void *data)
+static void exynos4210_pmu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/exynos4210_rng.c b/hw/misc/exynos4210_rng.c
index a741cf176b..2d0ebc457b 100644
--- a/hw/misc/exynos4210_rng.c
+++ b/hw/misc/exynos4210_rng.c
@@ -255,7 +255,7 @@ static const VMStateDescription exynos4210_rng_vmstate = {
     }
 };
 
-static void exynos4210_rng_class_init(ObjectClass *klass, void *data)
+static void exynos4210_rng_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/grlib_ahb_apb_pnp.c b/hw/misc/grlib_ahb_apb_pnp.c
index 5b05f15859..cdca00ad54 100644
--- a/hw/misc/grlib_ahb_apb_pnp.c
+++ b/hw/misc/grlib_ahb_apb_pnp.c
@@ -168,7 +168,7 @@ static void grlib_ahb_pnp_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &ahb_pnp->iomem);
 }
 
-static void grlib_ahb_pnp_class_init(ObjectClass *klass, void *data)
+static void grlib_ahb_pnp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -280,7 +280,7 @@ static void grlib_apb_pnp_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &apb_pnp->iomem);
 }
 
-static void grlib_apb_pnp_class_init(ObjectClass *klass, void *data)
+static void grlib_apb_pnp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/i2c-echo.c b/hw/misc/i2c-echo.c
index fcd407dfc6..2bb99ec0db 100644
--- a/hw/misc/i2c-echo.c
+++ b/hw/misc/i2c-echo.c
@@ -145,7 +145,7 @@ static void i2c_echo_realize(DeviceState *dev, Error **errp)
     state->bh = qemu_bh_new(i2c_echo_bh, state);
 }
 
-static void i2c_echo_class_init(ObjectClass *oc, void *data)
+static void i2c_echo_class_init(ObjectClass *oc, const void *data)
 {
     I2CSlaveClass *sc = I2C_SLAVE_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
diff --git a/hw/misc/imx25_ccm.c b/hw/misc/imx25_ccm.c
index 9654d23f19..a6665d5535 100644
--- a/hw/misc/imx25_ccm.c
+++ b/hw/misc/imx25_ccm.c
@@ -292,7 +292,7 @@ static void imx25_ccm_init(Object *obj)
     sysbus_init_mmio(sd, &s->iomem);
 }
 
-static void imx25_ccm_class_init(ObjectClass *klass, void *data)
+static void imx25_ccm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IMXCCMClass *ccm = IMX_CCM_CLASS(klass);
diff --git a/hw/misc/imx31_ccm.c b/hw/misc/imx31_ccm.c
index 93130b24e5..339458e859 100644
--- a/hw/misc/imx31_ccm.c
+++ b/hw/misc/imx31_ccm.c
@@ -319,7 +319,7 @@ static void imx31_ccm_init(Object *obj)
     sysbus_init_mmio(sd, &s->iomem);
 }
 
-static void imx31_ccm_class_init(ObjectClass *klass, void *data)
+static void imx31_ccm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc  = DEVICE_CLASS(klass);
     IMXCCMClass *ccm = IMX_CCM_CLASS(klass);
diff --git a/hw/misc/imx6_ccm.c b/hw/misc/imx6_ccm.c
index 7d522ed7c5..a10b67d396 100644
--- a/hw/misc/imx6_ccm.c
+++ b/hw/misc/imx6_ccm.c
@@ -741,7 +741,7 @@ static void imx6_ccm_init(Object *obj)
     sysbus_init_mmio(sd, &s->container);
 }
 
-static void imx6_ccm_class_init(ObjectClass *klass, void *data)
+static void imx6_ccm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IMXCCMClass *ccm = IMX_CCM_CLASS(klass);
diff --git a/hw/misc/imx6_src.c b/hw/misc/imx6_src.c
index 06cc46292e..8d2c4175e4 100644
--- a/hw/misc/imx6_src.c
+++ b/hw/misc/imx6_src.c
@@ -273,7 +273,7 @@ static void imx6_src_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
 }
 
-static void imx6_src_class_init(ObjectClass *klass, void *data)
+static void imx6_src_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/imx6ul_ccm.c b/hw/misc/imx6ul_ccm.c
index c836dfe494..7f3ae61710 100644
--- a/hw/misc/imx6ul_ccm.c
+++ b/hw/misc/imx6ul_ccm.c
@@ -904,7 +904,7 @@ static void imx6ul_ccm_init(Object *obj)
     sysbus_init_mmio(sd, &s->container);
 }
 
-static void imx6ul_ccm_class_init(ObjectClass *klass, void *data)
+static void imx6ul_ccm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IMXCCMClass *ccm = IMX_CCM_CLASS(klass);
diff --git a/hw/misc/imx7_ccm.c b/hw/misc/imx7_ccm.c
index c3ecfd78c1..c061a584e4 100644
--- a/hw/misc/imx7_ccm.c
+++ b/hw/misc/imx7_ccm.c
@@ -262,7 +262,7 @@ static uint32_t imx7_ccm_get_clock_frequency(IMXCCMState *dev, IMXClk clock)
     return freq;
 }
 
-static void imx7_ccm_class_init(ObjectClass *klass, void *data)
+static void imx7_ccm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IMXCCMClass *ccm = IMX_CCM_CLASS(klass);
@@ -293,7 +293,7 @@ static const VMStateDescription vmstate_imx7_analog = {
     },
 };
 
-static void imx7_analog_class_init(ObjectClass *klass, void *data)
+static void imx7_analog_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/imx7_gpr.c b/hw/misc/imx7_gpr.c
index b03341a2eb..e12b496273 100644
--- a/hw/misc/imx7_gpr.c
+++ b/hw/misc/imx7_gpr.c
@@ -102,7 +102,7 @@ static void imx7_gpr_init(Object *obj)
     sysbus_init_mmio(sd, &s->mmio);
 }
 
-static void imx7_gpr_class_init(ObjectClass *klass, void *data)
+static void imx7_gpr_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/imx7_snvs.c b/hw/misc/imx7_snvs.c
index c8a096bc13..6a8733d23d 100644
--- a/hw/misc/imx7_snvs.c
+++ b/hw/misc/imx7_snvs.c
@@ -143,7 +143,7 @@ static void imx7_snvs_init(Object *obj)
         qemu_clock_get_ns(rtc_clock) / NANOSECONDS_PER_SECOND;
 }
 
-static void imx7_snvs_class_init(ObjectClass *klass, void *data)
+static void imx7_snvs_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/imx7_src.c b/hw/misc/imx7_src.c
index 35341c6819..df0b0a6905 100644
--- a/hw/misc/imx7_src.c
+++ b/hw/misc/imx7_src.c
@@ -251,7 +251,7 @@ static void imx7_src_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
 }
 
-static void imx7_src_class_init(ObjectClass *klass, void *data)
+static void imx7_src_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/imx8mp_analog.c b/hw/misc/imx8mp_analog.c
index f7e7c83cc4..23ffae84f8 100644
--- a/hw/misc/imx8mp_analog.c
+++ b/hw/misc/imx8mp_analog.c
@@ -138,7 +138,7 @@ static const VMStateDescription imx8mp_analog_vmstate = {
     },
 };
 
-static void imx8mp_analog_class_init(ObjectClass *klass, void *data)
+static void imx8mp_analog_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/imx8mp_ccm.c b/hw/misc/imx8mp_ccm.c
index 1a1c932427..911911ed86 100644
--- a/hw/misc/imx8mp_ccm.c
+++ b/hw/misc/imx8mp_ccm.c
@@ -150,7 +150,7 @@ static uint32_t imx8mp_ccm_get_clock_frequency(IMXCCMState *dev, IMXClk clock)
     return freq;
 }
 
-static void imx8mp_ccm_class_init(ObjectClass *klass, void *data)
+static void imx8mp_ccm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IMXCCMClass *ccm = IMX_CCM_CLASS(klass);
diff --git a/hw/misc/imx_rngc.c b/hw/misc/imx_rngc.c
index 0cbf28db5d..630f6cb54b 100644
--- a/hw/misc/imx_rngc.c
+++ b/hw/misc/imx_rngc.c
@@ -254,7 +254,7 @@ static const VMStateDescription vmstate_imx_rngc = {
     }
 };
 
-static void imx_rngc_class_init(ObjectClass *klass, void *data)
+static void imx_rngc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/iosb.c b/hw/misc/iosb.c
index 31927eaedb..96221e1ee5 100644
--- a/hw/misc/iosb.c
+++ b/hw/misc/iosb.c
@@ -111,7 +111,7 @@ static const VMStateDescription vmstate_iosb = {
     }
 };
 
-static void iosb_class_init(ObjectClass *oc, void *data)
+static void iosb_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ResettableClass *rc = RESETTABLE_CLASS(oc);
diff --git a/hw/misc/iotkit-secctl.c b/hw/misc/iotkit-secctl.c
index 04ced3559c..afd9ab48df 100644
--- a/hw/misc/iotkit-secctl.c
+++ b/hw/misc/iotkit-secctl.c
@@ -818,7 +818,7 @@ static const Property iotkit_secctl_props[] = {
     DEFINE_PROP_UINT32("sse-version", IoTKitSecCtl, sse_version, 0),
 };
 
-static void iotkit_secctl_class_init(ObjectClass *klass, void *data)
+static void iotkit_secctl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/iotkit-sysctl.c b/hw/misc/iotkit-sysctl.c
index c654af2e88..d70e51ab2e 100644
--- a/hw/misc/iotkit-sysctl.c
+++ b/hw/misc/iotkit-sysctl.c
@@ -844,7 +844,7 @@ static const Property iotkit_sysctl_props[] = {
                        0x10000000),
 };
 
-static void iotkit_sysctl_class_init(ObjectClass *klass, void *data)
+static void iotkit_sysctl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/iotkit-sysinfo.c b/hw/misc/iotkit-sysinfo.c
index 75260f7fab..57405cb7e1 100644
--- a/hw/misc/iotkit-sysinfo.c
+++ b/hw/misc/iotkit-sysinfo.c
@@ -158,7 +158,7 @@ static void iotkit_sysinfo_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void iotkit_sysinfo_class_init(ObjectClass *klass, void *data)
+static void iotkit_sysinfo_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/ivshmem-flat.c b/hw/misc/ivshmem-flat.c
index c4e82a0827..be28c24d73 100644
--- a/hw/misc/ivshmem-flat.c
+++ b/hw/misc/ivshmem-flat.c
@@ -431,7 +431,7 @@ static const Property ivshmem_flat_props[] = {
     DEFINE_PROP_UINT32("shmem-size", IvshmemFTState, shmem_size, 4 * MiB),
 };
 
-static void ivshmem_flat_class_init(ObjectClass *klass, void *data)
+static void ivshmem_flat_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/ivshmem-pci.c b/hw/misc/ivshmem-pci.c
index 900d523334..5a10bca633 100644
--- a/hw/misc/ivshmem-pci.c
+++ b/hw/misc/ivshmem-pci.c
@@ -979,7 +979,7 @@ static int ivshmem_post_load(void *opaque, int version_id)
     return 0;
 }
 
-static void ivshmem_common_class_init(ObjectClass *klass, void *data)
+static void ivshmem_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1002,7 +1002,7 @@ static const TypeInfo ivshmem_common_info = {
     .instance_size = sizeof(IVShmemState),
     .abstract      = true,
     .class_init    = ivshmem_common_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -1044,7 +1044,7 @@ static void ivshmem_plain_realize(PCIDevice *dev, Error **errp)
     ivshmem_common_realize(dev, errp);
 }
 
-static void ivshmem_plain_class_init(ObjectClass *klass, void *data)
+static void ivshmem_plain_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1103,7 +1103,7 @@ static void ivshmem_doorbell_realize(PCIDevice *dev, Error **errp)
     ivshmem_common_realize(dev, errp);
 }
 
-static void ivshmem_doorbell_class_init(ObjectClass *klass, void *data)
+static void ivshmem_doorbell_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/misc/lasi.c b/hw/misc/lasi.c
index 24d20ffcb8..9f758c6a86 100644
--- a/hw/misc/lasi.c
+++ b/hw/misc/lasi.c
@@ -263,7 +263,7 @@ static void lasi_init(Object *obj)
     qdev_init_gpio_in(DEVICE(obj), lasi_set_irq, LASI_IRQS);
 }
 
-static void lasi_class_init(ObjectClass *klass, void *data)
+static void lasi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/led.c b/hw/misc/led.c
index 9364d9945e..f7f709072a 100644
--- a/hw/misc/led.c
+++ b/hw/misc/led.c
@@ -107,7 +107,7 @@ static const Property led_properties[] = {
     DEFINE_PROP_BOOL("gpio-active-high", LEDState, gpio_active_high, true),
 };
 
-static void led_class_init(ObjectClass *klass, void *data)
+static void led_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c
index 3c0819c58a..bc37e2a2cb 100644
--- a/hw/misc/mac_via.c
+++ b/hw/misc/mac_via.c
@@ -1326,7 +1326,7 @@ static const Property mos6522_q800_via1_properties[] = {
     DEFINE_PROP_DRIVE("drive", MOS6522Q800VIA1State, blk),
 };
 
-static void mos6522_q800_via1_class_init(ObjectClass *oc, void *data)
+static void mos6522_q800_via1_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ResettableClass *rc = RESETTABLE_CLASS(oc);
@@ -1415,7 +1415,7 @@ static const VMStateDescription vmstate_q800_via2 = {
     }
 };
 
-static void mos6522_q800_via2_class_init(ObjectClass *oc, void *data)
+static void mos6522_q800_via2_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ResettableClass *rc = RESETTABLE_CLASS(oc);
diff --git a/hw/misc/macio/cuda.c b/hw/misc/macio/cuda.c
index 34731ae560..bcd00c9bb1 100644
--- a/hw/misc/macio/cuda.c
+++ b/hw/misc/macio/cuda.c
@@ -558,7 +558,7 @@ static const Property cuda_properties[] = {
     DEFINE_PROP_UINT64("timebase-frequency", CUDAState, tb_frequency, 0),
 };
 
-static void cuda_class_init(ObjectClass *oc, void *data)
+static void cuda_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -598,7 +598,7 @@ static void mos6522_cuda_reset_hold(Object *obj, ResetType type)
     ms->timers[1].frequency = (SCALE_US * 6000) / 4700;
 }
 
-static void mos6522_cuda_class_init(ObjectClass *oc, void *data)
+static void mos6522_cuda_class_init(ObjectClass *oc, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(oc);
     MOS6522DeviceClass *mdc = MOS6522_CLASS(oc);
diff --git a/hw/misc/macio/gpio.c b/hw/misc/macio/gpio.c
index e87bfca1f5..990551f91f 100644
--- a/hw/misc/macio/gpio.c
+++ b/hw/misc/macio/gpio.c
@@ -194,7 +194,7 @@ static void macio_gpio_nmi(NMIState *n, int cpu_index, Error **errp)
     macio_set_gpio(MACIO_GPIO(n), 9, false);
 }
 
-static void macio_gpio_class_init(ObjectClass *oc, void *data)
+static void macio_gpio_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     NMIClass *nc = NMI_CLASS(oc);
@@ -210,7 +210,7 @@ static const TypeInfo macio_gpio_init_info = {
     .instance_size = sizeof(MacIOGPIOState),
     .instance_init = macio_gpio_init,
     .class_init    = macio_gpio_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_NMI },
         { }
     },
diff --git a/hw/misc/macio/mac_dbdma.c b/hw/misc/macio/mac_dbdma.c
index de0f934f7d..b2b42dd562 100644
--- a/hw/misc/macio/mac_dbdma.c
+++ b/hw/misc/macio/mac_dbdma.c
@@ -917,7 +917,7 @@ static void mac_dbdma_realize(DeviceState *dev, Error **errp)
     s->bh = qemu_bh_new_guarded(DBDMA_run_bh, s, &dev->mem_reentrancy_guard);
 }
 
-static void mac_dbdma_class_init(ObjectClass *oc, void *data)
+static void mac_dbdma_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/misc/macio/macio.c b/hw/misc/macio/macio.c
index 194b152eff..6710485d72 100644
--- a/hw/misc/macio/macio.c
+++ b/hw/misc/macio/macio.c
@@ -385,7 +385,7 @@ static const VMStateDescription vmstate_macio_oldworld = {
     }
 };
 
-static void macio_oldworld_class_init(ObjectClass *oc, void *data)
+static void macio_oldworld_class_init(ObjectClass *oc, const void *data)
 {
     PCIDeviceClass *pdc = PCI_DEVICE_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -410,7 +410,7 @@ static const Property macio_newworld_properties[] = {
     DEFINE_PROP_BOOL("has-adb", NewWorldMacIOState, has_adb, false),
 };
 
-static void macio_newworld_class_init(ObjectClass *oc, void *data)
+static void macio_newworld_class_init(ObjectClass *oc, const void *data)
 {
     PCIDeviceClass *pdc = PCI_DEVICE_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -425,7 +425,7 @@ static const Property macio_properties[] = {
     DEFINE_PROP_UINT64("frequency", MacIOState, frequency, 0),
 };
 
-static void macio_class_init(ObjectClass *klass, void *data)
+static void macio_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -465,7 +465,7 @@ static const TypeInfo macio_type_info = {
     .instance_init = macio_instance_init,
     .abstract      = true,
     .class_init    = macio_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/misc/macio/pmu.c b/hw/misc/macio/pmu.c
index 73190559a8..3734913994 100644
--- a/hw/misc/macio/pmu.c
+++ b/hw/misc/macio/pmu.c
@@ -764,7 +764,7 @@ static const Property pmu_properties[] = {
     DEFINE_PROP_BOOL("has-adb", PMUState, has_adb, true),
 };
 
-static void pmu_class_init(ObjectClass *oc, void *data)
+static void pmu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -808,7 +808,7 @@ static void mos6522_pmu_reset_hold(Object *obj, ResetType type)
     s->last_b = ms->b = TACK | TREQ;
 }
 
-static void mos6522_pmu_class_init(ObjectClass *oc, void *data)
+static void mos6522_pmu_class_init(ObjectClass *oc, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(oc);
     MOS6522DeviceClass *mdc = MOS6522_CLASS(oc);
diff --git a/hw/misc/mchp_pfsoc_dmc.c b/hw/misc/mchp_pfsoc_dmc.c
index 43d8e970ab..599f845f45 100644
--- a/hw/misc/mchp_pfsoc_dmc.c
+++ b/hw/misc/mchp_pfsoc_dmc.c
@@ -110,7 +110,8 @@ static void mchp_pfsoc_ddr_sgmii_phy_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->sgmii_phy);
 }
 
-static void mchp_pfsoc_ddr_sgmii_phy_class_init(ObjectClass *klass, void *data)
+static void mchp_pfsoc_ddr_sgmii_phy_class_init(ObjectClass *klass,
+                                                const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -192,7 +193,7 @@ static void mchp_pfsoc_ddr_cfg_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->cfg);
 }
 
-static void mchp_pfsoc_ddr_cfg_class_init(ObjectClass *klass, void *data)
+static void mchp_pfsoc_ddr_cfg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/mchp_pfsoc_ioscb.c b/hw/misc/mchp_pfsoc_ioscb.c
index a71d134295..10fc7ea2a9 100644
--- a/hw/misc/mchp_pfsoc_ioscb.c
+++ b/hw/misc/mchp_pfsoc_ioscb.c
@@ -292,7 +292,7 @@ static void mchp_pfsoc_ioscb_realize(DeviceState *dev, Error **errp)
     sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
 }
 
-static void mchp_pfsoc_ioscb_class_init(ObjectClass *klass, void *data)
+static void mchp_pfsoc_ioscb_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/mchp_pfsoc_sysreg.c b/hw/misc/mchp_pfsoc_sysreg.c
index 7876fe0c5b..bfa78d3d2f 100644
--- a/hw/misc/mchp_pfsoc_sysreg.c
+++ b/hw/misc/mchp_pfsoc_sysreg.c
@@ -85,7 +85,7 @@ static void mchp_pfsoc_sysreg_realize(DeviceState *dev, Error **errp)
     sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
 }
 
-static void mchp_pfsoc_sysreg_class_init(ObjectClass *klass, void *data)
+static void mchp_pfsoc_sysreg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/mips_cmgcr.c b/hw/misc/mips_cmgcr.c
index 95f19912b4..5484b73967 100644
--- a/hw/misc/mips_cmgcr.c
+++ b/hw/misc/mips_cmgcr.c
@@ -229,7 +229,7 @@ static void mips_gcr_realize(DeviceState *dev, Error **errp)
     s->vps = g_new(MIPSGCRVPState, s->num_vps);
 }
 
-static void mips_gcr_class_init(ObjectClass *klass, void *data)
+static void mips_gcr_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     device_class_set_props(dc, mips_gcr_properties);
diff --git a/hw/misc/mips_cpc.c b/hw/misc/mips_cpc.c
index b7a13d1afb..9bfb7c9721 100644
--- a/hw/misc/mips_cpc.c
+++ b/hw/misc/mips_cpc.c
@@ -166,7 +166,7 @@ static const Property mips_cpc_properties[] = {
     DEFINE_PROP_UINT64("vp-start-running", MIPSCPCState, vp_start_running, 0x1),
 };
 
-static void mips_cpc_class_init(ObjectClass *klass, void *data)
+static void mips_cpc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/mips_itu.c b/hw/misc/mips_itu.c
index 2d126ebaf8..fc17385cde 100644
--- a/hw/misc/mips_itu.c
+++ b/hw/misc/mips_itu.c
@@ -540,7 +540,7 @@ static const Property mips_itu_properties[] = {
                       ITC_SEMAPH_NUM_MAX),
 };
 
-static void mips_itu_class_init(ObjectClass *klass, void *data)
+static void mips_itu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/mos6522.c b/hw/misc/mos6522.c
index 0b8f6a4cb4..8dd6b82ac5 100644
--- a/hw/misc/mos6522.c
+++ b/hw/misc/mos6522.c
@@ -700,7 +700,7 @@ static const Property mos6522_properties[] = {
     DEFINE_PROP_UINT64("frequency", MOS6522State, frequency, 0),
 };
 
-static void mos6522_class_init(ObjectClass *oc, void *data)
+static void mos6522_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ResettableClass *rc = RESETTABLE_CLASS(oc);
diff --git a/hw/misc/mps2-fpgaio.c b/hw/misc/mps2-fpgaio.c
index 04a3da5db0..bee1309f5a 100644
--- a/hw/misc/mps2-fpgaio.c
+++ b/hw/misc/mps2-fpgaio.c
@@ -328,7 +328,7 @@ static const Property mps2_fpgaio_properties[] = {
     DEFINE_PROP_BOOL("has-dbgctrl", MPS2FPGAIO, has_dbgctrl, false),
 };
 
-static void mps2_fpgaio_class_init(ObjectClass *klass, void *data)
+static void mps2_fpgaio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/mps2-scc.c b/hw/misc/mps2-scc.c
index 5f8d6bca43..a9a5d4a535 100644
--- a/hw/misc/mps2-scc.c
+++ b/hw/misc/mps2-scc.c
@@ -474,7 +474,7 @@ static const Property mps2_scc_properties[] = {
                       qdev_prop_uint32, uint32_t),
 };
 
-static void mps2_scc_class_init(ObjectClass *klass, void *data)
+static void mps2_scc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/msf2-sysreg.c b/hw/misc/msf2-sysreg.c
index 20009adbd9..ce0ad50c1b 100644
--- a/hw/misc/msf2-sysreg.c
+++ b/hw/misc/msf2-sysreg.c
@@ -136,7 +136,7 @@ static void msf2_sysreg_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void msf2_sysreg_class_init(ObjectClass *klass, void *data)
+static void msf2_sysreg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/npcm7xx_mft.c b/hw/misc/npcm7xx_mft.c
index e565cac05d..b35e971fe5 100644
--- a/hw/misc/npcm7xx_mft.c
+++ b/hw/misc/npcm7xx_mft.c
@@ -515,7 +515,7 @@ static const VMStateDescription vmstate_npcm7xx_mft = {
     },
 };
 
-static void npcm7xx_mft_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_mft_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/misc/npcm7xx_pwm.c b/hw/misc/npcm7xx_pwm.c
index f7f77e30a2..2de18d09b8 100644
--- a/hw/misc/npcm7xx_pwm.c
+++ b/hw/misc/npcm7xx_pwm.c
@@ -543,7 +543,7 @@ static const VMStateDescription vmstate_npcm7xx_pwm_module = {
     },
 };
 
-static void npcm7xx_pwm_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_pwm_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/misc/npcm7xx_rng.c b/hw/misc/npcm7xx_rng.c
index 7f7e5eca62..7d47a1caa0 100644
--- a/hw/misc/npcm7xx_rng.c
+++ b/hw/misc/npcm7xx_rng.c
@@ -158,7 +158,7 @@ static const VMStateDescription vmstate_npcm7xx_rng = {
     },
 };
 
-static void npcm7xx_rng_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_rng_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/misc/npcm_clk.c b/hw/misc/npcm_clk.c
index b6a893ffb2..c48d40b446 100644
--- a/hw/misc/npcm_clk.c
+++ b/hw/misc/npcm_clk.c
@@ -1102,7 +1102,7 @@ static const VMStateDescription vmstate_npcm_clk = {
     },
 };
 
-static void npcm7xx_clk_pll_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_clk_pll_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1112,7 +1112,7 @@ static void npcm7xx_clk_pll_class_init(ObjectClass *klass, void *data)
     dc->user_creatable = false;
 }
 
-static void npcm7xx_clk_sel_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_clk_sel_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1122,7 +1122,7 @@ static void npcm7xx_clk_sel_class_init(ObjectClass *klass, void *data)
     dc->user_creatable = false;
 }
 
-static void npcm7xx_clk_divider_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_clk_divider_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1132,7 +1132,7 @@ static void npcm7xx_clk_divider_class_init(ObjectClass *klass, void *data)
     dc->user_creatable = false;
 }
 
-static void npcm_clk_class_init(ObjectClass *klass, void *data)
+static void npcm_clk_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -1142,7 +1142,7 @@ static void npcm_clk_class_init(ObjectClass *klass, void *data)
     rc->phases.enter = npcm_clk_enter_reset;
 }
 
-static void npcm7xx_clk_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_clk_class_init(ObjectClass *klass, const void *data)
 {
     NPCMCLKClass *c = NPCM_CLK_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -1152,7 +1152,7 @@ static void npcm7xx_clk_class_init(ObjectClass *klass, void *data)
     c->cold_reset_values = npcm7xx_cold_reset_values;
 }
 
-static void npcm8xx_clk_class_init(ObjectClass *klass, void *data)
+static void npcm8xx_clk_class_init(ObjectClass *klass, const void *data)
 {
     NPCMCLKClass *c = NPCM_CLK_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/misc/npcm_gcr.c b/hw/misc/npcm_gcr.c
index 4e8ce2cb89..2acaa16771 100644
--- a/hw/misc/npcm_gcr.c
+++ b/hw/misc/npcm_gcr.c
@@ -422,7 +422,7 @@ static const Property npcm_gcr_properties[] = {
     DEFINE_PROP_UINT32("power-on-straps", NPCMGCRState, reset_pwron, 0),
 };
 
-static void npcm_gcr_class_init(ObjectClass *klass, void *data)
+static void npcm_gcr_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -432,7 +432,7 @@ static void npcm_gcr_class_init(ObjectClass *klass, void *data)
     device_class_set_props(dc, npcm_gcr_properties);
 }
 
-static void npcm7xx_gcr_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_gcr_class_init(ObjectClass *klass, const void *data)
 {
     NPCMGCRClass *c = NPCM_GCR_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -446,7 +446,7 @@ static void npcm7xx_gcr_class_init(ObjectClass *klass, void *data)
     rc->phases.enter = npcm7xx_gcr_enter_reset;
 }
 
-static void npcm8xx_gcr_class_init(ObjectClass *klass, void *data)
+static void npcm8xx_gcr_class_init(ObjectClass *klass, const void *data)
 {
     NPCMGCRClass *c = NPCM_GCR_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/misc/nrf51_rng.c b/hw/misc/nrf51_rng.c
index 1e67acdf23..8cd7ffe3f5 100644
--- a/hw/misc/nrf51_rng.c
+++ b/hw/misc/nrf51_rng.c
@@ -240,7 +240,7 @@ static const VMStateDescription vmstate_rng = {
     }
 };
 
-static void nrf51_rng_class_init(ObjectClass *klass, void *data)
+static void nrf51_rng_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/pc-testdev.c b/hw/misc/pc-testdev.c
index e389651869..67c486f347 100644
--- a/hw/misc/pc-testdev.c
+++ b/hw/misc/pc-testdev.c
@@ -193,7 +193,7 @@ static void testdev_realizefn(DeviceState *d, Error **errp)
     memory_region_add_subregion(mem, 0xff000000, &dev->iomem);
 }
 
-static void testdev_class_init(ObjectClass *klass, void *data)
+static void testdev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/pci-testdev.c b/hw/misc/pci-testdev.c
index f6718a7c37..3f6a8bba84 100644
--- a/hw/misc/pci-testdev.c
+++ b/hw/misc/pci-testdev.c
@@ -323,7 +323,7 @@ static const Property pci_testdev_properties[] = {
     DEFINE_PROP_SIZE("membar", PCITestDevState, membar_size, 0),
 };
 
-static void pci_testdev_class_init(ObjectClass *klass, void *data)
+static void pci_testdev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -345,7 +345,7 @@ static const TypeInfo pci_testdev_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCITestDevState),
     .class_init    = pci_testdev_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/misc/pvpanic-isa.c b/hw/misc/pvpanic-isa.c
index c3713dc5c4..f7b421c713 100644
--- a/hw/misc/pvpanic-isa.c
+++ b/hw/misc/pvpanic-isa.c
@@ -104,7 +104,7 @@ static const Property pvpanic_isa_properties[] = {
                       PVPANIC_EVENTS),
 };
 
-static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
+static void pvpanic_isa_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
@@ -121,7 +121,7 @@ static const TypeInfo pvpanic_isa_info = {
     .instance_size = sizeof(PVPanicISAState),
     .instance_init = pvpanic_isa_initfn,
     .class_init    = pvpanic_isa_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
diff --git a/hw/misc/pvpanic-mmio.c b/hw/misc/pvpanic-mmio.c
index 70097cecc7..2a363106b2 100644
--- a/hw/misc/pvpanic-mmio.c
+++ b/hw/misc/pvpanic-mmio.c
@@ -36,7 +36,7 @@ static const Property pvpanic_mmio_properties[] = {
                       PVPANIC_PANICKED | PVPANIC_CRASH_LOADED),
 };
 
-static void pvpanic_mmio_class_init(ObjectClass *klass, void *data)
+static void pvpanic_mmio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/pvpanic-pci.c b/hw/misc/pvpanic-pci.c
index e5f0788ec0..2869b6a7ff 100644
--- a/hw/misc/pvpanic-pci.c
+++ b/hw/misc/pvpanic-pci.c
@@ -58,7 +58,7 @@ static const Property pvpanic_pci_properties[] = {
                       PVPANIC_EVENTS),
 };
 
-static void pvpanic_pci_class_init(ObjectClass *klass, void *data)
+static void pvpanic_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
@@ -80,7 +80,7 @@ static const TypeInfo pvpanic_pci_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PVPanicPCIState),
     .class_init    = pvpanic_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
     }
diff --git a/hw/misc/sbsa_ec.c b/hw/misc/sbsa_ec.c
index a1e813691e..dfee1af5ad 100644
--- a/hw/misc/sbsa_ec.c
+++ b/hw/misc/sbsa_ec.c
@@ -73,7 +73,7 @@ static void sbsa_ec_init(Object *obj)
     sysbus_init_mmio(dev, &s->iomem);
 }
 
-static void sbsa_ec_class_init(ObjectClass *klass, void *data)
+static void sbsa_ec_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/sifive_e_aon.c b/hw/misc/sifive_e_aon.c
index 17a522ccf9..6eef38d622 100644
--- a/hw/misc/sifive_e_aon.c
+++ b/hw/misc/sifive_e_aon.c
@@ -294,7 +294,7 @@ static const Property sifive_e_aon_properties[] = {
                        SIFIVE_E_LFCLK_DEFAULT_FREQ),
 };
 
-static void sifive_e_aon_class_init(ObjectClass *oc, void *data)
+static void sifive_e_aon_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/misc/sifive_u_otp.c b/hw/misc/sifive_u_otp.c
index d6df867fbd..1ebed2fd8b 100644
--- a/hw/misc/sifive_u_otp.c
+++ b/hw/misc/sifive_u_otp.c
@@ -270,7 +270,7 @@ static void sifive_u_otp_realize(DeviceState *dev, Error **errp)
     memset(s->fuse_wo, 0x00, sizeof(s->fuse_wo));
 }
 
-static void sifive_u_otp_class_init(ObjectClass *klass, void *data)
+static void sifive_u_otp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/sifive_u_prci.c b/hw/misc/sifive_u_prci.c
index cafe6a66f4..6e75cb6d0d 100644
--- a/hw/misc/sifive_u_prci.c
+++ b/hw/misc/sifive_u_prci.c
@@ -146,7 +146,7 @@ static void sifive_u_prci_reset(DeviceState *dev)
     s->coreclksel = SIFIVE_U_PRCI_CORECLKSEL_HFCLK;
 }
 
-static void sifive_u_prci_class_init(ObjectClass *klass, void *data)
+static void sifive_u_prci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/slavio_misc.c b/hw/misc/slavio_misc.c
index dace6d28cc..a034df3592 100644
--- a/hw/misc/slavio_misc.c
+++ b/hw/misc/slavio_misc.c
@@ -483,7 +483,7 @@ static void slavio_misc_init(Object *obj)
     qdev_init_gpio_in(dev, slavio_set_power_fail, 1);
 }
 
-static void slavio_misc_class_init(ObjectClass *klass, void *data)
+static void slavio_misc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/stm32_rcc.c b/hw/misc/stm32_rcc.c
index 26672b5b24..94e8dae441 100644
--- a/hw/misc/stm32_rcc.c
+++ b/hw/misc/stm32_rcc.c
@@ -138,7 +138,7 @@ static const VMStateDescription vmstate_stm32_rcc = {
     }
 };
 
-static void stm32_rcc_class_init(ObjectClass *klass, void *data)
+static void stm32_rcc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/stm32f2xx_syscfg.c b/hw/misc/stm32f2xx_syscfg.c
index 6c7b722274..d285896ea7 100644
--- a/hw/misc/stm32f2xx_syscfg.c
+++ b/hw/misc/stm32f2xx_syscfg.c
@@ -138,7 +138,7 @@ static void stm32f2xx_syscfg_init(Object *obj)
     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 }
 
-static void stm32f2xx_syscfg_class_init(ObjectClass *klass, void *data)
+static void stm32f2xx_syscfg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/stm32f4xx_exti.c b/hw/misc/stm32f4xx_exti.c
index efd996df94..0688e6e73e 100644
--- a/hw/misc/stm32f4xx_exti.c
+++ b/hw/misc/stm32f4xx_exti.c
@@ -164,7 +164,7 @@ static const VMStateDescription vmstate_stm32f4xx_exti = {
     }
 };
 
-static void stm32f4xx_exti_class_init(ObjectClass *klass, void *data)
+static void stm32f4xx_exti_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/stm32f4xx_syscfg.c b/hw/misc/stm32f4xx_syscfg.c
index 7d0f3eb5f5..addfb031e8 100644
--- a/hw/misc/stm32f4xx_syscfg.c
+++ b/hw/misc/stm32f4xx_syscfg.c
@@ -147,7 +147,7 @@ static const VMStateDescription vmstate_stm32f4xx_syscfg = {
     }
 };
 
-static void stm32f4xx_syscfg_class_init(ObjectClass *klass, void *data)
+static void stm32f4xx_syscfg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/stm32l4x5_exti.c b/hw/misc/stm32l4x5_exti.c
index e281841dcf..9c002164c8 100644
--- a/hw/misc/stm32l4x5_exti.c
+++ b/hw/misc/stm32l4x5_exti.c
@@ -271,7 +271,7 @@ static const VMStateDescription vmstate_stm32l4x5_exti = {
     }
 };
 
-static void stm32l4x5_exti_class_init(ObjectClass *klass, void *data)
+static void stm32l4x5_exti_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/misc/stm32l4x5_rcc.c b/hw/misc/stm32l4x5_rcc.c
index 158b743cae..0e1f27fbdd 100644
--- a/hw/misc/stm32l4x5_rcc.c
+++ b/hw/misc/stm32l4x5_rcc.c
@@ -141,7 +141,7 @@ static const VMStateDescription clock_mux_vmstate = {
     }
 };
 
-static void clock_mux_class_init(ObjectClass *klass, void *data)
+static void clock_mux_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -295,7 +295,7 @@ static const VMStateDescription pll_vmstate = {
     }
 };
 
-static void pll_class_init(ObjectClass *klass, void *data)
+static void pll_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -1439,7 +1439,7 @@ static const Property stm32l4x5_rcc_properties[] = {
         sai2_extclk_frequency, 0),
 };
 
-static void stm32l4x5_rcc_class_init(ObjectClass *klass, void *data)
+static void stm32l4x5_rcc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/misc/stm32l4x5_syscfg.c b/hw/misc/stm32l4x5_syscfg.c
index a947a9e036..4e21756e0b 100644
--- a/hw/misc/stm32l4x5_syscfg.c
+++ b/hw/misc/stm32l4x5_syscfg.c
@@ -259,7 +259,7 @@ static const VMStateDescription vmstate_stm32l4x5_syscfg = {
     }
 };
 
-static void stm32l4x5_syscfg_class_init(ObjectClass *klass, void *data)
+static void stm32l4x5_syscfg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/misc/tz-mpc.c b/hw/misc/tz-mpc.c
index 6d827d21dc..a158d4a294 100644
--- a/hw/misc/tz-mpc.c
+++ b/hw/misc/tz-mpc.c
@@ -592,7 +592,7 @@ static const Property tz_mpc_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void tz_mpc_class_init(ObjectClass *klass, void *data)
+static void tz_mpc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -611,7 +611,7 @@ static const TypeInfo tz_mpc_info = {
 };
 
 static void tz_mpc_iommu_memory_region_class_init(ObjectClass *klass,
-                                                  void *data)
+                                                  const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/misc/tz-msc.c b/hw/misc/tz-msc.c
index 505df4e190..af0cc5d471 100644
--- a/hw/misc/tz-msc.c
+++ b/hw/misc/tz-msc.c
@@ -285,7 +285,7 @@ static const Property tz_msc_properties[] = {
                      TYPE_IDAU_INTERFACE, IDAUInterface *),
 };
 
-static void tz_msc_class_init(ObjectClass *klass, void *data)
+static void tz_msc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/tz-ppc.c b/hw/misc/tz-ppc.c
index 1daa54c5e6..e4235a846d 100644
--- a/hw/misc/tz-ppc.c
+++ b/hw/misc/tz-ppc.c
@@ -325,7 +325,7 @@ static const Property tz_ppc_properties[] = {
     DEFINE_PORT(15),
 };
 
-static void tz_ppc_class_init(ObjectClass *klass, void *data)
+static void tz_ppc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/unimp.c b/hw/misc/unimp.c
index 257282a3a9..4370c14ef1 100644
--- a/hw/misc/unimp.c
+++ b/hw/misc/unimp.c
@@ -75,7 +75,7 @@ static const Property unimp_properties[] = {
     DEFINE_PROP_STRING("name", UnimplementedDeviceState, name),
 };
 
-static void unimp_class_init(ObjectClass *klass, void *data)
+static void unimp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/misc/virt_ctrl.c b/hw/misc/virt_ctrl.c
index a210a5924c..9f16093ca2 100644
--- a/hw/misc/virt_ctrl.c
+++ b/hw/misc/virt_ctrl.c
@@ -125,7 +125,7 @@ static void virt_ctrl_instance_init(Object *obj)
     sysbus_init_irq(dev, &s->irq);
 }
 
-static void virt_ctrl_class_init(ObjectClass *oc, void *data)
+static void virt_ctrl_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/misc/vmcoreinfo.c b/hw/misc/vmcoreinfo.c
index b0145fa504..9c2e9005ad 100644
--- a/hw/misc/vmcoreinfo.c
+++ b/hw/misc/vmcoreinfo.c
@@ -83,7 +83,7 @@ static const VMStateDescription vmstate_vmcoreinfo = {
     },
 };
 
-static void vmcoreinfo_device_class_init(ObjectClass *klass, void *data)
+static void vmcoreinfo_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/misc/xlnx-versal-cframe-reg.c b/hw/misc/xlnx-versal-cframe-reg.c
index 8db0f7e658..1ce083e240 100644
--- a/hw/misc/xlnx-versal-cframe-reg.c
+++ b/hw/misc/xlnx-versal-cframe-reg.c
@@ -803,7 +803,7 @@ static const Property cframe_bcast_regs_props[] = {
                      TYPE_XLNX_CFI_IF, XlnxCfiIf *),
 };
 
-static void cframe_reg_class_init(ObjectClass *klass, void *data)
+static void cframe_reg_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -817,7 +817,7 @@ static void cframe_reg_class_init(ObjectClass *klass, void *data)
     xcic->cfi_transfer_packet = cframe_reg_cfi_transfer_packet;
 }
 
-static void cframe_bcast_reg_class_init(ObjectClass *klass, void *data)
+static void cframe_bcast_reg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -833,7 +833,7 @@ static const TypeInfo cframe_reg_info = {
     .instance_size = sizeof(XlnxVersalCFrameReg),
     .class_init    = cframe_reg_class_init,
     .instance_init = cframe_reg_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_XLNX_CFI_IF },
         { }
     }
diff --git a/hw/misc/xlnx-versal-cfu.c b/hw/misc/xlnx-versal-cfu.c
index 26d06e2557..b920fc77c3 100644
--- a/hw/misc/xlnx-versal-cfu.c
+++ b/hw/misc/xlnx-versal-cfu.c
@@ -496,7 +496,7 @@ static const VMStateDescription vmstate_cfu_sfr = {
     }
 };
 
-static void cfu_apb_class_init(ObjectClass *klass, void *data)
+static void cfu_apb_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -505,7 +505,7 @@ static void cfu_apb_class_init(ObjectClass *klass, void *data)
     device_class_set_props(dc, cfu_props);
 }
 
-static void cfu_fdro_class_init(ObjectClass *klass, void *data)
+static void cfu_fdro_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -516,7 +516,7 @@ static void cfu_fdro_class_init(ObjectClass *klass, void *data)
     rc->phases.enter = cfu_fdro_reset_enter;
 }
 
-static void cfu_sfr_class_init(ObjectClass *klass, void *data)
+static void cfu_sfr_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -532,7 +532,7 @@ static const TypeInfo cfu_apb_info = {
     .instance_size = sizeof(XlnxVersalCFUAPB),
     .class_init    = cfu_apb_class_init,
     .instance_init = cfu_apb_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_XLNX_CFI_IF },
         { }
     }
@@ -545,7 +545,7 @@ static const TypeInfo cfu_fdro_info = {
     .class_init    = cfu_fdro_class_init,
     .instance_init = cfu_fdro_init,
     .instance_finalize = cfu_fdro_finalize,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_XLNX_CFI_IF },
         { }
     }
diff --git a/hw/misc/xlnx-versal-crl.c b/hw/misc/xlnx-versal-crl.c
index f143900d5b..08ff2fcc24 100644
--- a/hw/misc/xlnx-versal-crl.c
+++ b/hw/misc/xlnx-versal-crl.c
@@ -394,7 +394,7 @@ static const VMStateDescription vmstate_crl = {
     }
 };
 
-static void crl_class_init(ObjectClass *klass, void *data)
+static void crl_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/misc/xlnx-versal-pmc-iou-slcr.c b/hw/misc/xlnx-versal-pmc-iou-slcr.c
index e469c04d76..d76df468d4 100644
--- a/hw/misc/xlnx-versal-pmc-iou-slcr.c
+++ b/hw/misc/xlnx-versal-pmc-iou-slcr.c
@@ -1419,7 +1419,8 @@ static const VMStateDescription vmstate_pmc_iou_slcr = {
     }
 };
 
-static void xlnx_versal_pmc_iou_slcr_class_init(ObjectClass *klass, void *data)
+static void xlnx_versal_pmc_iou_slcr_class_init(ObjectClass *klass,
+                                                const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/misc/xlnx-versal-trng.c b/hw/misc/xlnx-versal-trng.c
index ba93f93cab..f34dd3ef35 100644
--- a/hw/misc/xlnx-versal-trng.c
+++ b/hw/misc/xlnx-versal-trng.c
@@ -682,7 +682,7 @@ static const VMStateDescription vmstate_trng = {
     }
 };
 
-static void trng_class_init(ObjectClass *klass, void *data)
+static void trng_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/misc/xlnx-versal-xramc.c b/hw/misc/xlnx-versal-xramc.c
index d1e76be027..07370b80c0 100644
--- a/hw/misc/xlnx-versal-xramc.c
+++ b/hw/misc/xlnx-versal-xramc.c
@@ -222,7 +222,7 @@ static const Property xram_ctrl_properties[] = {
     DEFINE_PROP_UINT64("size", XlnxXramCtrl, cfg.size, 1 * MiB),
 };
 
-static void xram_ctrl_class_init(ObjectClass *klass, void *data)
+static void xram_ctrl_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/misc/xlnx-zynqmp-apu-ctrl.c b/hw/misc/xlnx-zynqmp-apu-ctrl.c
index 87e4a14067..e85da32d99 100644
--- a/hw/misc/xlnx-zynqmp-apu-ctrl.c
+++ b/hw/misc/xlnx-zynqmp-apu-ctrl.c
@@ -224,7 +224,7 @@ static const VMStateDescription vmstate_zynqmp_apu = {
     }
 };
 
-static void zynqmp_apu_class_init(ObjectClass *klass, void *data)
+static void zynqmp_apu_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/misc/xlnx-zynqmp-crf.c b/hw/misc/xlnx-zynqmp-crf.c
index e5aba56f69..cccca0e814 100644
--- a/hw/misc/xlnx-zynqmp-crf.c
+++ b/hw/misc/xlnx-zynqmp-crf.c
@@ -239,7 +239,7 @@ static const VMStateDescription vmstate_crf = {
     }
 };
 
-static void crf_class_init(ObjectClass *klass, void *data)
+static void crf_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/misc/zynq_slcr.c b/hw/misc/zynq_slcr.c
index a766bab182..010387beec 100644
--- a/hw/misc/zynq_slcr.c
+++ b/hw/misc/zynq_slcr.c
@@ -627,7 +627,7 @@ static const Property zynq_slcr_props[] = {
     DEFINE_PROP_UINT8("boot-mode", ZynqSLCRState, boot_mode, 1),
 };
 
-static void zynq_slcr_class_init(ObjectClass *klass, void *data)
+static void zynq_slcr_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/net/allwinner-sun8i-emac.c b/hw/net/allwinner-sun8i-emac.c
index 5adb41dc46..30a81576b4 100644
--- a/hw/net/allwinner-sun8i-emac.c
+++ b/hw/net/allwinner-sun8i-emac.c
@@ -875,7 +875,8 @@ static const VMStateDescription vmstate_aw_emac = {
     }
 };
 
-static void allwinner_sun8i_emac_class_init(ObjectClass *klass, void *data)
+static void allwinner_sun8i_emac_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/allwinner_emac.c b/hw/net/allwinner_emac.c
index 47f1e7f086..77d089d988 100644
--- a/hw/net/allwinner_emac.c
+++ b/hw/net/allwinner_emac.c
@@ -514,7 +514,7 @@ static const VMStateDescription vmstate_aw_emac = {
     }
 };
 
-static void aw_emac_class_init(ObjectClass *klass, void *data)
+static void aw_emac_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c
index 80fbbacc1e..50025d5a6f 100644
--- a/hw/net/cadence_gem.c
+++ b/hw/net/cadence_gem.c
@@ -1817,7 +1817,7 @@ static const Property gem_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void gem_class_init(ObjectClass *klass, void *data)
+static void gem_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/can/can_kvaser_pci.c b/hw/net/can/can_kvaser_pci.c
index 9e363d532f..be16769de2 100644
--- a/hw/net/can/can_kvaser_pci.c
+++ b/hw/net/can/can_kvaser_pci.c
@@ -282,7 +282,7 @@ static void kvaser_pci_instance_init(Object *obj)
                              0);
 }
 
-static void kvaser_pci_class_init(ObjectClass *klass, void *data)
+static void kvaser_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -305,7 +305,7 @@ static const TypeInfo kvaser_pci_info = {
     .instance_size = sizeof(KvaserPCIState),
     .class_init    = kvaser_pci_class_init,
     .instance_init = kvaser_pci_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/net/can/can_mioe3680_pci.c b/hw/net/can/can_mioe3680_pci.c
index 580f099e00..44f3ba370d 100644
--- a/hw/net/can/can_mioe3680_pci.c
+++ b/hw/net/can/can_mioe3680_pci.c
@@ -223,7 +223,7 @@ static void mioe3680_pci_instance_init(Object *obj)
                              0);
 }
 
-static void mioe3680_pci_class_init(ObjectClass *klass, void *data)
+static void mioe3680_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -248,7 +248,7 @@ static const TypeInfo mioe3680_pci_info = {
     .instance_size = sizeof(Mioe3680PCIState),
     .class_init    = mioe3680_pci_class_init,
     .instance_init = mioe3680_pci_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/net/can/can_pcm3680_pci.c b/hw/net/can/can_pcm3680_pci.c
index 3195b79954..7296d63be7 100644
--- a/hw/net/can/can_pcm3680_pci.c
+++ b/hw/net/can/can_pcm3680_pci.c
@@ -224,7 +224,7 @@ static void pcm3680i_pci_instance_init(Object *obj)
                              0);
 }
 
-static void pcm3680i_pci_class_init(ObjectClass *klass, void *data)
+static void pcm3680i_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -249,7 +249,7 @@ static const TypeInfo pcm3680i_pci_info = {
     .instance_size = sizeof(Pcm3680iPCIState),
     .class_init    = pcm3680i_pci_class_init,
     .instance_init = pcm3680i_pci_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/net/can/ctucan_pci.c b/hw/net/can/ctucan_pci.c
index a8c77b9194..bed6785433 100644
--- a/hw/net/can/ctucan_pci.c
+++ b/hw/net/can/ctucan_pci.c
@@ -237,7 +237,7 @@ static void ctucan_pci_instance_init(Object *obj)
 #endif
 }
 
-static void ctucan_pci_class_init(ObjectClass *klass, void *data)
+static void ctucan_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -262,7 +262,7 @@ static const TypeInfo ctucan_pci_info = {
     .instance_size = sizeof(CtuCanPCIState),
     .class_init    = ctucan_pci_class_init,
     .instance_init = ctucan_pci_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/net/can/xlnx-versal-canfd.c b/hw/net/can/xlnx-versal-canfd.c
index b5a4a4af7e..3eb111949f 100644
--- a/hw/net/can/xlnx-versal-canfd.c
+++ b/hw/net/can/xlnx-versal-canfd.c
@@ -1278,7 +1278,7 @@ static void tx_fifo_stamp(XlnxVersalCANFDState *s, uint32_t tb0_regid)
     }
 }
 
-static gint g_cmp_ids(gconstpointer data1, gconstpointer data2)
+static gint g_cmp_ids(gconstpointer data1, gconstpointer data2, gpointer d)
 {
     tx_ready_reg_info *tx_reg_1 = (tx_ready_reg_info *) data1;
     tx_ready_reg_info *tx_reg_2 = (tx_ready_reg_info *) data2;
@@ -1316,7 +1316,7 @@ static GSList *prepare_tx_data(XlnxVersalCANFDState *s)
             temp->can_id = s->regs[reg_num];
             temp->reg_num = reg_num;
             list = g_slist_prepend(list, temp);
-            list = g_slist_sort(list, g_cmp_ids);
+            list = g_slist_sort_with_data(list, g_cmp_ids, NULL);
         }
 
         reg_ready >>= 1;
@@ -2052,7 +2052,7 @@ static const Property canfd_core_properties[] = {
                      CanBusState *),
 };
 
-static void canfd_class_init(ObjectClass *klass, void *data)
+static void canfd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/can/xlnx-zynqmp-can.c b/hw/net/can/xlnx-zynqmp-can.c
index 9fbdeea368..ca9edd4a5b 100644
--- a/hw/net/can/xlnx-zynqmp-can.c
+++ b/hw/net/can/xlnx-zynqmp-can.c
@@ -1176,7 +1176,7 @@ static const Property xlnx_zynqmp_can_properties[] = {
                      CanBusState *),
 };
 
-static void xlnx_zynqmp_can_class_init(ObjectClass *klass, void *data)
+static void xlnx_zynqmp_can_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c
index c80ddb12e3..d49032059b 100644
--- a/hw/net/dp8393x.c
+++ b/hw/net/dp8393x.c
@@ -939,7 +939,7 @@ static const Property dp8393x_properties[] = {
     DEFINE_PROP_BOOL("big_endian", dp8393xState, big_endian, false),
 };
 
-static void dp8393x_class_init(ObjectClass *klass, void *data)
+static void dp8393x_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/e1000.c b/hw/net/e1000.c
index 3d0b227703..cba4999e6d 100644
--- a/hw/net/e1000.c
+++ b/hw/net/e1000.c
@@ -1694,7 +1694,7 @@ typedef struct E1000Info {
     uint16_t   phy_id2;
 } E1000Info;
 
-static void e1000_class_init(ObjectClass *klass, void *data)
+static void e1000_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -1732,7 +1732,7 @@ static const TypeInfo e1000_base_info = {
     .instance_init = e1000_instance_init,
     .class_size    = sizeof(E1000BaseClass),
     .abstract      = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -1770,7 +1770,7 @@ static void e1000_register_types(void)
 
         type_info.name = info->name;
         type_info.parent = TYPE_E1000_BASE;
-        type_info.class_data = (void *)info;
+        type_info.class_data = info;
         type_info.class_init = e1000_class_init;
 
         type_register_static(&type_info);
diff --git a/hw/net/e1000e.c b/hw/net/e1000e.c
index b72cbab7e8..89e6d52ba0 100644
--- a/hw/net/e1000e.c
+++ b/hw/net/e1000e.c
@@ -673,7 +673,7 @@ static const Property e1000e_properties[] = {
     DEFINE_PROP_BOOL("migrate-timadj", E1000EState, timadj, true),
 };
 
-static void e1000e_class_init(ObjectClass *class, void *data)
+static void e1000e_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(class);
     ResettableClass *rc = RESETTABLE_CLASS(class);
@@ -721,7 +721,7 @@ static const TypeInfo e1000e_info = {
     .instance_size = sizeof(E1000EState),
     .class_init = e1000e_class_init,
     .instance_init = e1000e_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { }
     },
diff --git a/hw/net/eepro100.c b/hw/net/eepro100.c
index 29a39865a6..d47df5a97f 100644
--- a/hw/net/eepro100.c
+++ b/hw/net/eepro100.c
@@ -2060,7 +2060,7 @@ static const Property e100_properties[] = {
     DEFINE_NIC_PROPERTIES(EEPRO100State, conf),
 };
 
-static void eepro100_class_init(ObjectClass *klass, void *data)
+static void eepro100_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -2094,7 +2094,7 @@ static void eepro100_register_types(void)
         type_info.class_init = eepro100_class_init;
         type_info.instance_size = sizeof(EEPRO100State);
         type_info.instance_init = eepro100_instance_init;
-        type_info.interfaces = (InterfaceInfo[]) {
+        type_info.interfaces = (const InterfaceInfo[]) {
             { INTERFACE_CONVENTIONAL_PCI_DEVICE },
             { },
         };
diff --git a/hw/net/fsl_etsec/etsec.c b/hw/net/fsl_etsec/etsec.c
index adde644892..d14cb2a101 100644
--- a/hw/net/fsl_etsec/etsec.c
+++ b/hw/net/fsl_etsec/etsec.c
@@ -418,7 +418,7 @@ static const Property etsec_properties[] = {
     DEFINE_NIC_PROPERTIES(eTSEC, conf),
 };
 
-static void etsec_class_init(ObjectClass *klass, void *data)
+static void etsec_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/ftgmac100.c b/hw/net/ftgmac100.c
index 1f524d7a01..c41ce889cf 100644
--- a/hw/net/ftgmac100.c
+++ b/hw/net/ftgmac100.c
@@ -1260,7 +1260,7 @@ static const Property ftgmac100_properties[] = {
     DEFINE_PROP_BOOL("dma64", FTGMAC100State, dma64, false),
 };
 
-static void ftgmac100_class_init(ObjectClass *klass, void *data)
+static void ftgmac100_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1419,7 +1419,7 @@ static const Property aspeed_mii_properties[] = {
                      FTGMAC100State *),
 };
 
-static void aspeed_mii_class_init(ObjectClass *klass, void *data)
+static void aspeed_mii_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/igb.c b/hw/net/igb.c
index e318df40e0..e4c02365d6 100644
--- a/hw/net/igb.c
+++ b/hw/net/igb.c
@@ -599,7 +599,7 @@ static const Property igb_properties[] = {
     DEFINE_PROP_BOOL("x-pcie-flr-init", IGBState, has_flr, true),
 };
 
-static void igb_class_init(ObjectClass *class, void *data)
+static void igb_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(class);
     ResettableClass *rc = RESETTABLE_CLASS(class);
@@ -635,7 +635,7 @@ static const TypeInfo igb_info = {
     .instance_size = sizeof(IGBState),
     .class_init = igb_class_init,
     .instance_init = igb_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { }
     },
diff --git a/hw/net/igbvf.c b/hw/net/igbvf.c
index 21a97d4d61..31d72c4977 100644
--- a/hw/net/igbvf.c
+++ b/hw/net/igbvf.c
@@ -299,7 +299,7 @@ static void igbvf_pci_uninit(PCIDevice *dev)
     msix_uninit(dev, &s->msix, &s->msix);
 }
 
-static void igbvf_class_init(ObjectClass *class, void *data)
+static void igbvf_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(class);
     PCIDeviceClass *c = PCI_DEVICE_CLASS(class);
@@ -325,7 +325,7 @@ static const TypeInfo igbvf_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(IgbVfState),
     .class_init = igbvf_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { }
     },
diff --git a/hw/net/imx_fec.c b/hw/net/imx_fec.c
index b7c9ee0b9a..e5e34dd1a4 100644
--- a/hw/net/imx_fec.c
+++ b/hw/net/imx_fec.c
@@ -1230,7 +1230,7 @@ static const Property imx_eth_properties[] = {
                      IMXFECState *),
 };
 
-static void imx_eth_class_init(ObjectClass *klass, void *data)
+static void imx_eth_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/lan9118.c b/hw/net/lan9118.c
index afee68c7db..6dda1e5c94 100644
--- a/hw/net/lan9118.c
+++ b/hw/net/lan9118.c
@@ -1309,7 +1309,7 @@ static const Property lan9118_properties[] = {
     DEFINE_PROP_UINT32("mode_16bit", lan9118_state, mode_16bit, 0),
 };
 
-static void lan9118_class_init(ObjectClass *klass, void *data)
+static void lan9118_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/lan9118_phy.c b/hw/net/lan9118_phy.c
index 5c53a4a1e3..4c4e03df11 100644
--- a/hw/net/lan9118_phy.c
+++ b/hw/net/lan9118_phy.c
@@ -200,7 +200,7 @@ static const VMStateDescription vmstate_lan9118_phy = {
     }
 };
 
-static void lan9118_phy_class_init(ObjectClass *klass, void *data)
+static void lan9118_phy_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/net/lance.c b/hw/net/lance.c
index 15492382f9..dfb855c23a 100644
--- a/hw/net/lance.c
+++ b/hw/net/lance.c
@@ -143,7 +143,7 @@ static const Property lance_properties[] = {
     DEFINE_NIC_PROPERTIES(SysBusPCNetState, state.conf),
 };
 
-static void lance_class_init(ObjectClass *klass, void *data)
+static void lance_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/lasi_i82596.c b/hw/net/lasi_i82596.c
index cad01f5351..9e1dd21546 100644
--- a/hw/net/lasi_i82596.c
+++ b/hw/net/lasi_i82596.c
@@ -162,7 +162,7 @@ static const Property lasi_82596_properties[] = {
     DEFINE_NIC_PROPERTIES(SysBusI82596State, state.conf),
 };
 
-static void lasi_82596_class_init(ObjectClass *klass, void *data)
+static void lasi_82596_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/mcf_fec.c b/hw/net/mcf_fec.c
index d5572a81d3..ae128fa311 100644
--- a/hw/net/mcf_fec.c
+++ b/hw/net/mcf_fec.c
@@ -664,7 +664,7 @@ static const Property mcf_fec_properties[] = {
     DEFINE_NIC_PROPERTIES(mcf_fec_state, conf),
 };
 
-static void mcf_fec_class_init(ObjectClass *oc, void *data)
+static void mcf_fec_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/net/mipsnet.c b/hw/net/mipsnet.c
index 8852b6f3a1..583aa1c7de 100644
--- a/hw/net/mipsnet.c
+++ b/hw/net/mipsnet.c
@@ -270,7 +270,7 @@ static const Property mipsnet_properties[] = {
     DEFINE_NIC_PROPERTIES(MIPSnetState, conf),
 };
 
-static void mipsnet_class_init(ObjectClass *klass, void *data)
+static void mipsnet_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/msf2-emac.c b/hw/net/msf2-emac.c
index 80f75f19dd..59045973ab 100644
--- a/hw/net/msf2-emac.c
+++ b/hw/net/msf2-emac.c
@@ -565,7 +565,7 @@ static const VMStateDescription vmstate_msf2_emac = {
     }
 };
 
-static void msf2_emac_class_init(ObjectClass *klass, void *data)
+static void msf2_emac_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/mv88w8618_eth.c b/hw/net/mv88w8618_eth.c
index 5a9d14bef6..6f08846c81 100644
--- a/hw/net/mv88w8618_eth.c
+++ b/hw/net/mv88w8618_eth.c
@@ -377,7 +377,7 @@ static const Property mv88w8618_eth_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void mv88w8618_eth_class_init(ObjectClass *klass, void *data)
+static void mv88w8618_eth_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/ne2000-isa.c b/hw/net/ne2000-isa.c
index 20973651f3..673c785abc 100644
--- a/hw/net/ne2000-isa.c
+++ b/hw/net/ne2000-isa.c
@@ -85,7 +85,7 @@ static const Property ne2000_isa_properties[] = {
     DEFINE_NIC_PROPERTIES(ISANE2000State, ne2000.c),
 };
 
-static void isa_ne2000_class_initfn(ObjectClass *klass, void *data)
+static void isa_ne2000_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/ne2000-pci.c b/hw/net/ne2000-pci.c
index 6840d0e720..ce937e1b61 100644
--- a/hw/net/ne2000-pci.c
+++ b/hw/net/ne2000-pci.c
@@ -100,7 +100,7 @@ static const Property ne2000_properties[] = {
     DEFINE_NIC_PROPERTIES(PCINE2000State, ne2000.c),
 };
 
-static void ne2000_class_init(ObjectClass *klass, void *data)
+static void ne2000_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -122,7 +122,7 @@ static const TypeInfo ne2000_info = {
     .instance_size = sizeof(PCINE2000State),
     .class_init    = ne2000_class_init,
     .instance_init = ne2000_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/net/npcm7xx_emc.c b/hw/net/npcm7xx_emc.c
index e06f652629..9ba35e2c81 100644
--- a/hw/net/npcm7xx_emc.c
+++ b/hw/net/npcm7xx_emc.c
@@ -849,7 +849,7 @@ static const Property npcm7xx_emc_properties[] = {
     DEFINE_NIC_PROPERTIES(NPCM7xxEMCState, conf),
 };
 
-static void npcm7xx_emc_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_emc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/npcm_gmac.c b/hw/net/npcm_gmac.c
index e1fb383772..a434112580 100644
--- a/hw/net/npcm_gmac.c
+++ b/hw/net/npcm_gmac.c
@@ -916,7 +916,7 @@ static const Property npcm_gmac_properties[] = {
     DEFINE_NIC_PROPERTIES(NPCMGMACState, conf),
 };
 
-static void npcm_gmac_class_init(ObjectClass *klass, void *data)
+static void npcm_gmac_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/npcm_pcs.c b/hw/net/npcm_pcs.c
index ce5034e234..6aec105271 100644
--- a/hw/net/npcm_pcs.c
+++ b/hw/net/npcm_pcs.c
@@ -387,7 +387,7 @@ static const VMStateDescription vmstate_npcm_pcs = {
     },
 };
 
-static void npcm_pcs_class_init(ObjectClass *klass, void *data)
+static void npcm_pcs_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/net/opencores_eth.c b/hw/net/opencores_eth.c
index 54daab7b04..7e955c0132 100644
--- a/hw/net/opencores_eth.c
+++ b/hw/net/opencores_eth.c
@@ -747,7 +747,7 @@ static const Property open_eth_properties[] = {
     DEFINE_NIC_PROPERTIES(OpenEthState, conf),
 };
 
-static void open_eth_class_init(ObjectClass *klass, void *data)
+static void open_eth_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/pcnet-pci.c b/hw/net/pcnet-pci.c
index b314ea7d6d..0ca5bc2193 100644
--- a/hw/net/pcnet-pci.c
+++ b/hw/net/pcnet-pci.c
@@ -256,7 +256,7 @@ static const Property pcnet_properties[] = {
     DEFINE_NIC_PROPERTIES(PCIPCNetState, state.conf),
 };
 
-static void pcnet_class_init(ObjectClass *klass, void *data)
+static void pcnet_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -280,7 +280,7 @@ static const TypeInfo pcnet_info = {
     .instance_size = sizeof(PCIPCNetState),
     .class_init    = pcnet_class_init,
     .instance_init = pcnet_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/net/rocker/rocker.c b/hw/net/rocker/rocker.c
index aa5d87fbc5..cc49701dd3 100644
--- a/hw/net/rocker/rocker.c
+++ b/hw/net/rocker/rocker.c
@@ -1475,7 +1475,7 @@ static const VMStateDescription rocker_vmsd = {
     .unmigratable = 1,
 };
 
-static void rocker_class_init(ObjectClass *klass, void *data)
+static void rocker_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1498,7 +1498,7 @@ static const TypeInfo rocker_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(Rocker),
     .class_init    = rocker_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
index 135ab57160..15b8f7501a 100644
--- a/hw/net/rtl8139.c
+++ b/hw/net/rtl8139.c
@@ -3414,7 +3414,7 @@ static const Property rtl8139_properties[] = {
     DEFINE_NIC_PROPERTIES(RTL8139State, conf),
 };
 
-static void rtl8139_class_init(ObjectClass *klass, void *data)
+static void rtl8139_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -3438,7 +3438,7 @@ static const TypeInfo rtl8139_info = {
     .instance_size = sizeof(RTL8139State),
     .class_init    = rtl8139_class_init,
     .instance_init = rtl8139_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/net/smc91c111.c b/hw/net/smc91c111.c
index 9ce42b5615..5cd78e334b 100644
--- a/hw/net/smc91c111.c
+++ b/hw/net/smc91c111.c
@@ -913,7 +913,7 @@ static const Property smc91c111_properties[] = {
     DEFINE_NIC_PROPERTIES(smc91c111_state, conf),
 };
 
-static void smc91c111_class_init(ObjectClass *klass, void *data)
+static void smc91c111_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/spapr_llan.c b/hw/net/spapr_llan.c
index 13fc6565f0..f6f217d632 100644
--- a/hw/net/spapr_llan.c
+++ b/hw/net/spapr_llan.c
@@ -848,7 +848,7 @@ static const VMStateDescription vmstate_spapr_llan = {
     }
 };
 
-static void spapr_vlan_class_init(ObjectClass *klass, void *data)
+static void spapr_vlan_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SpaprVioDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
diff --git a/hw/net/stellaris_enet.c b/hw/net/stellaris_enet.c
index a420732d48..2fc51e1e16 100644
--- a/hw/net/stellaris_enet.c
+++ b/hw/net/stellaris_enet.c
@@ -501,7 +501,7 @@ static const Property stellaris_enet_properties[] = {
     DEFINE_NIC_PROPERTIES(stellaris_enet_state, conf),
 };
 
-static void stellaris_enet_class_init(ObjectClass *klass, void *data)
+static void stellaris_enet_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/sungem.c b/hw/net/sungem.c
index 12a9a9df46..b405eb89fa 100644
--- a/hw/net/sungem.c
+++ b/hw/net/sungem.c
@@ -1454,7 +1454,7 @@ static const VMStateDescription vmstate_sungem = {
     }
 };
 
-static void sungem_class_init(ObjectClass *klass, void *data)
+static void sungem_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1477,7 +1477,7 @@ static const TypeInfo sungem_info = {
     .instance_size = sizeof(SunGEMState),
     .class_init    = sungem_class_init,
     .instance_init = sungem_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
     }
diff --git a/hw/net/sunhme.c b/hw/net/sunhme.c
index fa234d0da1..c2f7a8483d 100644
--- a/hw/net/sunhme.c
+++ b/hw/net/sunhme.c
@@ -937,7 +937,7 @@ static const VMStateDescription vmstate_hme = {
     }
 };
 
-static void sunhme_class_init(ObjectClass *klass, void *data)
+static void sunhme_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -958,7 +958,7 @@ static const TypeInfo sunhme_info = {
     .class_init    = sunhme_class_init,
     .instance_size = sizeof(SunHMEState),
     .instance_init = sunhme_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
     }
diff --git a/hw/net/tulip.c b/hw/net/tulip.c
index a0646bb84c..63fe513458 100644
--- a/hw/net/tulip.c
+++ b/hw/net/tulip.c
@@ -1011,7 +1011,7 @@ static const Property tulip_properties[] = {
     DEFINE_NIC_PROPERTIES(TULIPState, c),
 };
 
-static void tulip_class_init(ObjectClass *klass, void *data)
+static void tulip_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1035,7 +1035,7 @@ static const TypeInfo tulip_info = {
     .instance_size = sizeof(TULIPState),
     .class_init    = tulip_class_init,
     .instance_init = tulip_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index bd37651dab..2de037c273 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -4134,7 +4134,7 @@ static const Property virtio_net_properties[] = {
                       VIRTIO_NET_F_HOST_USO, true),
 };
 
-static void virtio_net_class_init(ObjectClass *klass, void *data)
+static void virtio_net_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/net/vmxnet3.c b/hw/net/vmxnet3.c
index f370d4a2ec..83d942af17 100644
--- a/hw/net/vmxnet3.c
+++ b/hw/net/vmxnet3.c
@@ -2491,7 +2491,7 @@ static void vmxnet3_realize(DeviceState *qdev, Error **errp)
     vc->parent_dc_realize(qdev, errp);
 }
 
-static void vmxnet3_class_init(ObjectClass *class, void *data)
+static void vmxnet3_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(class);
     PCIDeviceClass *c = PCI_DEVICE_CLASS(class);
@@ -2522,7 +2522,7 @@ static const TypeInfo vmxnet3_info = {
     .instance_size = sizeof(VMXNET3State),
     .class_init    = vmxnet3_class_init,
     .instance_init = vmxnet3_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c
index c48691207d..34c6a1d0b0 100644
--- a/hw/net/xen_nic.c
+++ b/hw/net/xen_nic.c
@@ -559,7 +559,7 @@ static const Property xen_netdev_properties[] = {
     DEFINE_PROP_INT32("idx", XenNetDev, dev, -1),
 };
 
-static void xen_netdev_class_init(ObjectClass *class, void *data)
+static void xen_netdev_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dev_class = DEVICE_CLASS(class);
     XenDeviceClass *xendev_class = XEN_DEVICE_CLASS(class);
diff --git a/hw/net/xgmac.c b/hw/net/xgmac.c
index e3cc4c60eb..9c87c4e70f 100644
--- a/hw/net/xgmac.c
+++ b/hw/net/xgmac.c
@@ -418,7 +418,7 @@ static const Property xgmac_properties[] = {
     DEFINE_NIC_PROPERTIES(XgmacState, conf),
 };
 
-static void xgmac_enet_class_init(ObjectClass *klass, void *data)
+static void xgmac_enet_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/net/xilinx_axienet.c b/hw/net/xilinx_axienet.c
index 457952af19..1f5c748047 100644
--- a/hw/net/xilinx_axienet.c
+++ b/hw/net/xilinx_axienet.c
@@ -1007,7 +1007,7 @@ static const Property xilinx_enet_properties[] = {
                      tx_control_dev, TYPE_STREAM_SINK, StreamSink *),
 };
 
-static void xilinx_enet_class_init(ObjectClass *klass, void *data)
+static void xilinx_enet_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1017,14 +1017,15 @@ static void xilinx_enet_class_init(ObjectClass *klass, void *data)
 }
 
 static void xilinx_enet_control_stream_class_init(ObjectClass *klass,
-                                                  void *data)
+                                                  const void *data)
 {
     StreamSinkClass *ssc = STREAM_SINK_CLASS(klass);
 
     ssc->push = xilinx_axienet_control_stream_push;
 }
 
-static void xilinx_enet_data_stream_class_init(ObjectClass *klass, void *data)
+static void xilinx_enet_data_stream_class_init(ObjectClass *klass,
+                                               const void *data)
 {
     StreamSinkClass *ssc = STREAM_SINK_CLASS(klass);
 
@@ -1044,7 +1045,7 @@ static const TypeInfo xilinx_enet_data_stream_info = {
     .parent        = TYPE_OBJECT,
     .instance_size = sizeof(XilinxAXIEnetStreamSink),
     .class_init    = xilinx_enet_data_stream_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
             { TYPE_STREAM_SINK },
             { }
     }
@@ -1055,7 +1056,7 @@ static const TypeInfo xilinx_enet_control_stream_info = {
     .parent        = TYPE_OBJECT,
     .instance_size = sizeof(XilinxAXIEnetStreamSink),
     .class_init    = xilinx_enet_control_stream_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
             { TYPE_STREAM_SINK },
             { }
     }
diff --git a/hw/net/xilinx_ethlite.c b/hw/net/xilinx_ethlite.c
index 15d9b95aa8..42b19d07c7 100644
--- a/hw/net/xilinx_ethlite.c
+++ b/hw/net/xilinx_ethlite.c
@@ -385,7 +385,7 @@ static const Property xilinx_ethlite_properties[] = {
     DEFINE_NIC_PROPERTIES(XlnxXpsEthLite, conf),
 };
 
-static void xilinx_ethlite_class_init(ObjectClass *klass, void *data)
+static void xilinx_ethlite_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/nubus/mac-nubus-bridge.c b/hw/nubus/mac-nubus-bridge.c
index a0da5a8b2f..0dac8d19b3 100644
--- a/hw/nubus/mac-nubus-bridge.c
+++ b/hw/nubus/mac-nubus-bridge.c
@@ -40,7 +40,7 @@ static void mac_nubus_bridge_init(Object *obj)
     sysbus_init_mmio(sbd, &s->slot_alias);
 }
 
-static void mac_nubus_bridge_class_init(ObjectClass *klass, void *data)
+static void mac_nubus_bridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/nubus/nubus-bridge.c b/hw/nubus/nubus-bridge.c
index 8fe4362723..fb14402c4f 100644
--- a/hw/nubus/nubus-bridge.c
+++ b/hw/nubus/nubus-bridge.c
@@ -28,7 +28,7 @@ static const Property nubus_bridge_properties[] = {
                        bus.slot_available_mask, 0xffff),
 };
 
-static void nubus_bridge_class_init(ObjectClass *klass, void *data)
+static void nubus_bridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/nubus/nubus-bus.c b/hw/nubus/nubus-bus.c
index 07c279bde5..44820f13a8 100644
--- a/hw/nubus/nubus-bus.c
+++ b/hw/nubus/nubus-bus.c
@@ -162,7 +162,7 @@ static bool nubus_check_address(BusState *bus, DeviceState *dev, Error **errp)
     return true;
 }
 
-static void nubus_class_init(ObjectClass *oc, void *data)
+static void nubus_class_init(ObjectClass *oc, const void *data)
 {
     BusClass *bc = BUS_CLASS(oc);
 
diff --git a/hw/nubus/nubus-device.c b/hw/nubus/nubus-device.c
index 6755c3dc43..7797e61c7f 100644
--- a/hw/nubus/nubus-device.c
+++ b/hw/nubus/nubus-device.c
@@ -112,7 +112,7 @@ static const Property nubus_device_properties[] = {
     DEFINE_PROP_STRING("romfile", NubusDevice, romfile),
 };
 
-static void nubus_device_class_init(ObjectClass *oc, void *data)
+static void nubus_device_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/nubus/nubus-virtio-mmio.c b/hw/nubus/nubus-virtio-mmio.c
index 7a98731c45..63aeca5b12 100644
--- a/hw/nubus/nubus-virtio-mmio.c
+++ b/hw/nubus/nubus-virtio-mmio.c
@@ -81,7 +81,7 @@ static void nubus_virtio_mmio_init(Object *obj)
                             "pic-input-irq", 1);
 }
 
-static void nubus_virtio_mmio_class_init(ObjectClass *oc, void *data)
+static void nubus_virtio_mmio_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     NubusVirtioMMIODeviceClass *nvmdc = NUBUS_VIRTIO_MMIO_CLASS(oc);
diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index d6b77d4fbc..fd935507bc 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -9183,7 +9183,7 @@ static const VMStateDescription nvme_vmstate = {
     .unmigratable = 1,
 };
 
-static void nvme_class_init(ObjectClass *oc, void *data)
+static void nvme_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
@@ -9221,7 +9221,7 @@ static const TypeInfo nvme_info = {
     .instance_size = sizeof(NvmeCtrl),
     .instance_init = nvme_instance_init,
     .class_init    = nvme_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { }
     },
diff --git a/hw/nvme/ns.c b/hw/nvme/ns.c
index 4ab8ba74f5..6df2e8e7c5 100644
--- a/hw/nvme/ns.c
+++ b/hw/nvme/ns.c
@@ -806,7 +806,7 @@ static const Property nvme_ns_props[] = {
     DEFINE_PROP_STRING("fdp.ruhs", NvmeNamespace, params.fdp.ruhs),
 };
 
-static void nvme_ns_class_init(ObjectClass *oc, void *data)
+static void nvme_ns_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/nvme/subsys.c b/hw/nvme/subsys.c
index b617ac3892..38271d78c8 100644
--- a/hw/nvme/subsys.c
+++ b/hw/nvme/subsys.c
@@ -218,7 +218,7 @@ static const Property nvme_subsystem_props[] = {
     DEFINE_PROP_UINT16("fdp.nruh", NvmeSubsystem, params.fdp.nruh, 0),
 };
 
-static void nvme_subsys_class_init(ObjectClass *oc, void *data)
+static void nvme_subsys_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/nvram/bcm2835_otp.c b/hw/nvram/bcm2835_otp.c
index c4aed28472..6816b53417 100644
--- a/hw/nvram/bcm2835_otp.c
+++ b/hw/nvram/bcm2835_otp.c
@@ -164,7 +164,7 @@ static const VMStateDescription vmstate_bcm2835_otp = {
     }
 };
 
-static void bcm2835_otp_class_init(ObjectClass *klass, void *data)
+static void bcm2835_otp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/nvram/ds1225y.c b/hw/nvram/ds1225y.c
index 6b2aa8c7d2..dbfd0d2e53 100644
--- a/hw/nvram/ds1225y.c
+++ b/hw/nvram/ds1225y.c
@@ -147,7 +147,7 @@ static const Property nvram_sysbus_properties[] = {
     DEFINE_PROP_STRING("filename", SysBusNvRamState, nvram.filename),
 };
 
-static void nvram_sysbus_class_init(ObjectClass *klass, void *data)
+static void nvram_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/nvram/eeprom_at24c.c b/hw/nvram/eeprom_at24c.c
index ff7a21eee7..82ea97e552 100644
--- a/hw/nvram/eeprom_at24c.c
+++ b/hw/nvram/eeprom_at24c.c
@@ -235,7 +235,7 @@ static const Property at24c_eeprom_props[] = {
 };
 
 static
-void at24c_eeprom_class_init(ObjectClass *klass, void *data)
+void at24c_eeprom_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index cbfb2b5303..237b9f7d1f 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -1228,7 +1228,7 @@ void load_image_to_fw_cfg(FWCfgState *fw_cfg, uint16_t size_key,
     fw_cfg_add_bytes(fw_cfg, data_key, data, size);
 }
 
-static void fw_cfg_class_init(ObjectClass *klass, void *data)
+static void fw_cfg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1303,7 +1303,7 @@ static void fw_cfg_io_realize(DeviceState *dev, Error **errp)
     fw_cfg_common_realize(dev, errp);
 }
 
-static void fw_cfg_io_class_init(ObjectClass *klass, void *data)
+static void fw_cfg_io_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1364,7 +1364,7 @@ static void fw_cfg_mem_realize(DeviceState *dev, Error **errp)
     fw_cfg_common_realize(dev, errp);
 }
 
-static void fw_cfg_mem_class_init(ObjectClass *klass, void *data)
+static void fw_cfg_mem_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/nvram/mac_nvram.c b/hw/nvram/mac_nvram.c
index 0d82e5a128..66526a2291 100644
--- a/hw/nvram/mac_nvram.c
+++ b/hw/nvram/mac_nvram.c
@@ -140,7 +140,7 @@ static const Property macio_nvram_properties[] = {
     DEFINE_PROP_DRIVE("drive", MacIONVRAMState, blk),
 };
 
-static void macio_nvram_class_init(ObjectClass *oc, void *data)
+static void macio_nvram_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/nvram/npcm7xx_otp.c b/hw/nvram/npcm7xx_otp.c
index f00ebfa931..1fb752b20f 100644
--- a/hw/nvram/npcm7xx_otp.c
+++ b/hw/nvram/npcm7xx_otp.c
@@ -391,7 +391,7 @@ static const VMStateDescription vmstate_npcm7xx_otp = {
     },
 };
 
-static void npcm7xx_otp_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_otp_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -403,14 +403,14 @@ static void npcm7xx_otp_class_init(ObjectClass *klass, void *data)
     rc->phases.enter = npcm7xx_otp_enter_reset;
 }
 
-static void npcm7xx_key_storage_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_key_storage_class_init(ObjectClass *klass, const void *data)
 {
     NPCM7xxOTPClass *oc = NPCM7XX_OTP_CLASS(klass);
 
     oc->mmio_ops = &npcm7xx_key_storage_ops;
 }
 
-static void npcm7xx_fuse_array_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_fuse_array_class_init(ObjectClass *klass, const void *data)
 {
     NPCM7xxOTPClass *oc = NPCM7XX_OTP_CLASS(klass);
 
diff --git a/hw/nvram/nrf51_nvm.c b/hw/nvram/nrf51_nvm.c
index 2ed4078858..23cc9fe9b3 100644
--- a/hw/nvram/nrf51_nvm.c
+++ b/hw/nvram/nrf51_nvm.c
@@ -370,7 +370,7 @@ static const VMStateDescription vmstate_nvm = {
     }
 };
 
-static void nrf51_nvm_class_init(ObjectClass *klass, void *data)
+static void nrf51_nvm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/nvram/spapr_nvram.c b/hw/nvram/spapr_nvram.c
index a45827f6aa..d0ac4e5735 100644
--- a/hw/nvram/spapr_nvram.c
+++ b/hw/nvram/spapr_nvram.c
@@ -257,7 +257,7 @@ static const Property spapr_nvram_properties[] = {
     DEFINE_PROP_DRIVE("drive", SpaprNvram, blk),
 };
 
-static void spapr_nvram_class_init(ObjectClass *klass, void *data)
+static void spapr_nvram_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SpaprVioDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
diff --git a/hw/nvram/xlnx-bbram.c b/hw/nvram/xlnx-bbram.c
index 14cc9073c7..5702bb3f31 100644
--- a/hw/nvram/xlnx-bbram.c
+++ b/hw/nvram/xlnx-bbram.c
@@ -525,7 +525,7 @@ static const Property bbram_ctrl_props[] = {
     DEFINE_PROP_UINT32("crc-zpads", XlnxBBRam, crc_zpads, 1),
 };
 
-static void bbram_ctrl_class_init(ObjectClass *klass, void *data)
+static void bbram_ctrl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/nvram/xlnx-efuse.c b/hw/nvram/xlnx-efuse.c
index 176e88fcd1..4c23f8b931 100644
--- a/hw/nvram/xlnx-efuse.c
+++ b/hw/nvram/xlnx-efuse.c
@@ -274,7 +274,7 @@ static const Property efuse_properties[] = {
                       qdev_prop_uint32, uint32_t),
 };
 
-static void efuse_class_init(ObjectClass *klass, void *data)
+static void efuse_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/nvram/xlnx-versal-efuse-cache.c b/hw/nvram/xlnx-versal-efuse-cache.c
index 2fb599422c..d4ec96a626 100644
--- a/hw/nvram/xlnx-versal-efuse-cache.c
+++ b/hw/nvram/xlnx-versal-efuse-cache.c
@@ -89,7 +89,7 @@ static const Property efuse_cache_props[] = {
                      TYPE_XLNX_EFUSE, XlnxEFuse *),
 };
 
-static void efuse_cache_class_init(ObjectClass *klass, void *data)
+static void efuse_cache_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/nvram/xlnx-versal-efuse-ctrl.c b/hw/nvram/xlnx-versal-efuse-ctrl.c
index ff4d544ad6..9096219800 100644
--- a/hw/nvram/xlnx-versal-efuse-ctrl.c
+++ b/hw/nvram/xlnx-versal-efuse-ctrl.c
@@ -751,7 +751,7 @@ static const Property efuse_ctrl_props[] = {
                       extra_pg0_lock_spec, qdev_prop_uint16, uint16_t),
 };
 
-static void efuse_ctrl_class_init(ObjectClass *klass, void *data)
+static void efuse_ctrl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/nvram/xlnx-zynqmp-efuse.c b/hw/nvram/xlnx-zynqmp-efuse.c
index 15024daf4f..5a218c32e8 100644
--- a/hw/nvram/xlnx-zynqmp-efuse.c
+++ b/hw/nvram/xlnx-zynqmp-efuse.c
@@ -839,7 +839,7 @@ static const Property zynqmp_efuse_props[] = {
                      TYPE_XLNX_EFUSE, XlnxEFuse *),
 };
 
-static void zynqmp_efuse_class_init(ObjectClass *klass, void *data)
+static void zynqmp_efuse_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/openrisc/openrisc_sim.c b/hw/openrisc/openrisc_sim.c
index c2284a7d41..880c8ebbb8 100644
--- a/hw/openrisc/openrisc_sim.c
+++ b/hw/openrisc/openrisc_sim.c
@@ -357,7 +357,7 @@ static void openrisc_sim_init(MachineState *machine)
     }
 }
 
-static void openrisc_sim_machine_init(ObjectClass *oc, void *data)
+static void openrisc_sim_machine_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/openrisc/virt.c b/hw/openrisc/virt.c
index 0d1c1f103c..a98071c936 100644
--- a/hw/openrisc/virt.c
+++ b/hw/openrisc/virt.c
@@ -543,7 +543,7 @@ static void openrisc_virt_init(MachineState *machine)
     }
 }
 
-static void openrisc_virt_machine_init(ObjectClass *oc, void *data)
+static void openrisc_virt_machine_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/pci-bridge/cxl_downstream.c b/hw/pci-bridge/cxl_downstream.c
index e337f1ac50..1065245a8b 100644
--- a/hw/pci-bridge/cxl_downstream.c
+++ b/hw/pci-bridge/cxl_downstream.c
@@ -219,7 +219,7 @@ static const Property cxl_dsp_props[] = {
                                 width, PCIE_LINK_WIDTH_16),
 };
 
-static void cxl_dsp_class_init(ObjectClass *oc, void *data)
+static void cxl_dsp_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(oc);
@@ -241,7 +241,7 @@ static const TypeInfo cxl_dsp_info = {
     .instance_size = sizeof(CXLDownstreamPort),
     .parent = TYPE_PCIE_SLOT,
     .class_init = cxl_dsp_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { INTERFACE_CXL_DEVICE },
         { }
diff --git a/hw/pci-bridge/cxl_root_port.c b/hw/pci-bridge/cxl_root_port.c
index c0037f2cfb..e6a4035d26 100644
--- a/hw/pci-bridge/cxl_root_port.c
+++ b/hw/pci-bridge/cxl_root_port.c
@@ -262,7 +262,7 @@ static void cxl_rp_write_config(PCIDevice *d, uint32_t address, uint32_t val,
     cxl_rp_dvsec_write_config(d, address, val, len);
 }
 
-static void cxl_root_port_class_init(ObjectClass *oc, void *data)
+static void cxl_root_port_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc        = DEVICE_CLASS(oc);
     PCIDeviceClass *k      = PCI_DEVICE_CLASS(oc);
@@ -294,7 +294,7 @@ static const TypeInfo cxl_root_port_info = {
     .parent = TYPE_PCIE_ROOT_PORT,
     .instance_size = sizeof(CXLRootPort),
     .class_init = cxl_root_port_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CXL_DEVICE },
         { }
     },
diff --git a/hw/pci-bridge/cxl_upstream.c b/hw/pci-bridge/cxl_upstream.c
index 28b109c49a..208e0c6172 100644
--- a/hw/pci-bridge/cxl_upstream.c
+++ b/hw/pci-bridge/cxl_upstream.c
@@ -371,7 +371,7 @@ static const Property cxl_upstream_props[] = {
                                 width, PCIE_LINK_WIDTH_16),
 };
 
-static void cxl_upstream_class_init(ObjectClass *oc, void *data)
+static void cxl_upstream_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(oc);
@@ -394,7 +394,7 @@ static const TypeInfo cxl_usp_info = {
     .parent = TYPE_PCIE_PORT,
     .instance_size = sizeof(CXLUpstreamPort),
     .class_init = cxl_upstream_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { INTERFACE_CXL_DEVICE },
         { }
diff --git a/hw/pci-bridge/gen_pcie_root_port.c b/hw/pci-bridge/gen_pcie_root_port.c
index 3c0b41ef1a..d9078e783b 100644
--- a/hw/pci-bridge/gen_pcie_root_port.c
+++ b/hw/pci-bridge/gen_pcie_root_port.c
@@ -147,7 +147,7 @@ static const Property gen_rp_props[] = {
                                 width, PCIE_LINK_WIDTH_32),
 };
 
-static void gen_rp_dev_class_init(ObjectClass *klass, void *data)
+static void gen_rp_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/pci-bridge/i82801b11.c b/hw/pci-bridge/i82801b11.c
index 00d2fbd7cf..1d73c14c1f 100644
--- a/hw/pci-bridge/i82801b11.c
+++ b/hw/pci-bridge/i82801b11.c
@@ -87,7 +87,7 @@ static const VMStateDescription i82801b11_bridge_dev_vmstate = {
     }
 };
 
-static void i82801b11_bridge_class_init(ObjectClass *klass, void *data)
+static void i82801b11_bridge_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -107,7 +107,7 @@ static const TypeInfo i82801b11_bridge_info = {
     .parent        = TYPE_PCI_BRIDGE,
     .instance_size = sizeof(I82801b11Bridge),
     .class_init    = i82801b11_bridge_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/pci-bridge/ioh3420.c b/hw/pci-bridge/ioh3420.c
index be752a4bda..bba640f495 100644
--- a/hw/pci-bridge/ioh3420.c
+++ b/hw/pci-bridge/ioh3420.c
@@ -96,7 +96,7 @@ static const VMStateDescription vmstate_ioh3420 = {
     }
 };
 
-static void ioh3420_class_init(ObjectClass *klass, void *data)
+static void ioh3420_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/pci-bridge/pci_bridge_dev.c b/hw/pci-bridge/pci_bridge_dev.c
index 4931ea24f6..b328e50ab3 100644
--- a/hw/pci-bridge/pci_bridge_dev.c
+++ b/hw/pci-bridge/pci_bridge_dev.c
@@ -240,7 +240,7 @@ void pci_bridge_dev_unplug_request_cb(HotplugHandler *hotplug_dev,
     shpc_device_unplug_request_cb(hotplug_dev, dev, errp);
 }
 
-static void pci_bridge_dev_class_init(ObjectClass *klass, void *data)
+static void pci_bridge_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -268,7 +268,7 @@ static const TypeInfo pci_bridge_dev_info = {
     .instance_size     = sizeof(PCIBridgeDev),
     .class_init        = pci_bridge_dev_class_init,
     .instance_finalize = pci_bridge_dev_instance_finalize,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
@@ -280,7 +280,7 @@ static const TypeInfo pci_bridge_dev_info = {
  * different pci id, so we can match it easily in the guest for
  * automagic multiseat configuration.  See docs/multiseat.txt for more.
  */
-static void pci_bridge_dev_seat_class_init(ObjectClass *klass, void *data)
+static void pci_bridge_dev_seat_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/pci-bridge/pci_expander_bridge.c b/hw/pci-bridge/pci_expander_bridge.c
index 3396ab4bdd..3a29dfefc2 100644
--- a/hw/pci-bridge/pci_expander_bridge.c
+++ b/hw/pci-bridge/pci_expander_bridge.c
@@ -92,7 +92,7 @@ static void prop_pxb_uid_get(Object *obj, Visitor *v, const char *name,
     visit_type_uint32(v, name, &uid, errp);
 }
 
-static void pxb_bus_class_init(ObjectClass *class, void *data)
+static void pxb_bus_class_init(ObjectClass *class, const void *data)
 {
     PCIBusClass *pbc = PCI_BUS_CLASS(class);
 
@@ -169,7 +169,7 @@ static char *pxb_host_ofw_unit_address(const SysBusDevice *dev)
     return NULL;
 }
 
-static void pxb_host_class_init(ObjectClass *class, void *data)
+static void pxb_host_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(class);
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(class);
@@ -224,7 +224,7 @@ void pxb_cxl_hook_up_registers(CXLState *cxl_state, PCIBus *bus, Error **errp)
     cxl_state->next_mr_idx++;
 }
 
-static void pxb_cxl_host_class_init(ObjectClass *class, void *data)
+static void pxb_cxl_host_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(class);
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(class);
@@ -427,7 +427,7 @@ static const Property pxb_dev_properties[] = {
     DEFINE_PROP_BOOL("bypass_iommu", PXBDev, bypass_iommu, false),
 };
 
-static void pxb_dev_class_init(ObjectClass *klass, void *data)
+static void pxb_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -449,7 +449,7 @@ static const TypeInfo pxb_dev_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PXBDev),
     .class_init    = pxb_dev_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -465,7 +465,7 @@ static void pxb_pcie_dev_realize(PCIDevice *dev, Error **errp)
     pxb_dev_realize_common(dev, PCIE, errp);
 }
 
-static void pxb_pcie_dev_class_init(ObjectClass *klass, void *data)
+static void pxb_pcie_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -486,7 +486,7 @@ static const TypeInfo pxb_pcie_dev_info = {
     .parent        = TYPE_PXB_DEV,
     .instance_size = sizeof(PXBPCIEDev),
     .class_init    = pxb_pcie_dev_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -510,7 +510,7 @@ static const Property pxb_cxl_dev_properties[] = {
     DEFINE_PROP_BOOL("hdm_for_passthrough", PXBCXLDev, hdm_for_passthrough, false),
 };
 
-static void pxb_cxl_dev_class_init(ObjectClass *klass, void *data)
+static void pxb_cxl_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc   = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -537,7 +537,7 @@ static const TypeInfo pxb_cxl_dev_info = {
     .instance_size = sizeof(PXBCXLDev),
     .class_init    = pxb_cxl_dev_class_init,
     .interfaces =
-        (InterfaceInfo[]){
+        (const InterfaceInfo[]){
             { INTERFACE_CONVENTIONAL_PCI_DEVICE },
             {},
         },
diff --git a/hw/pci-bridge/pcie_pci_bridge.c b/hw/pci-bridge/pcie_pci_bridge.c
index 2429503cfb..fce292a519 100644
--- a/hw/pci-bridge/pcie_pci_bridge.c
+++ b/hw/pci-bridge/pcie_pci_bridge.c
@@ -137,7 +137,7 @@ static const VMStateDescription pcie_pci_bridge_dev_vmstate = {
         }
 };
 
-static void pcie_pci_bridge_class_init(ObjectClass *klass, void *data)
+static void pcie_pci_bridge_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -162,7 +162,7 @@ static const TypeInfo pcie_pci_bridge_info = {
         .parent = TYPE_PCI_BRIDGE,
         .instance_size = sizeof(PCIEPCIBridge),
         .class_init = pcie_pci_bridge_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { TYPE_HOTPLUG_HANDLER },
             { INTERFACE_PCIE_DEVICE },
             { },
diff --git a/hw/pci-bridge/pcie_root_port.c b/hw/pci-bridge/pcie_root_port.c
index dd40b366bf..22c2fdb71e 100644
--- a/hw/pci-bridge/pcie_root_port.c
+++ b/hw/pci-bridge/pcie_root_port.c
@@ -167,7 +167,7 @@ static void rp_instance_post_init(Object *obj)
     }
 }
 
-static void rp_class_init(ObjectClass *klass, void *data)
+static void rp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -188,7 +188,7 @@ static const TypeInfo rp_info = {
     .class_init    = rp_class_init,
     .abstract      = true,
     .class_size = sizeof(PCIERootPortClass),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { }
     },
diff --git a/hw/pci-bridge/simba.c b/hw/pci-bridge/simba.c
index 5fe090df6c..bbae594e11 100644
--- a/hw/pci-bridge/simba.c
+++ b/hw/pci-bridge/simba.c
@@ -66,7 +66,7 @@ static void simba_pci_bridge_realize(PCIDevice *dev, Error **errp)
     pci_bridge_update_mappings(PCI_BRIDGE(br));
 }
 
-static void simba_pci_bridge_class_init(ObjectClass *klass, void *data)
+static void simba_pci_bridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -87,7 +87,7 @@ static const TypeInfo simba_pci_bridge_info = {
     .parent        = TYPE_PCI_BRIDGE,
     .class_init    = simba_pci_bridge_class_init,
     .instance_size = sizeof(SimbaPCIBridge),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/pci-bridge/xio3130_downstream.c b/hw/pci-bridge/xio3130_downstream.c
index d4e94f2657..dc7d1aa7d7 100644
--- a/hw/pci-bridge/xio3130_downstream.c
+++ b/hw/pci-bridge/xio3130_downstream.c
@@ -153,7 +153,7 @@ static const VMStateDescription vmstate_xio3130_downstream = {
     }
 };
 
-static void xio3130_downstream_class_init(ObjectClass *klass, void *data)
+static void xio3130_downstream_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -175,7 +175,7 @@ static const TypeInfo xio3130_downstream_info = {
     .name          = TYPE_XIO3130_DOWNSTREAM,
     .parent        = TYPE_PCIE_SLOT,
     .class_init    = xio3130_downstream_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { }
     },
diff --git a/hw/pci-bridge/xio3130_upstream.c b/hw/pci-bridge/xio3130_upstream.c
index fb1547b74a..40057b749b 100644
--- a/hw/pci-bridge/xio3130_upstream.c
+++ b/hw/pci-bridge/xio3130_upstream.c
@@ -123,7 +123,7 @@ static const VMStateDescription vmstate_xio3130_upstream = {
     }
 };
 
-static void xio3130_upstream_class_init(ObjectClass *klass, void *data)
+static void xio3130_upstream_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -144,7 +144,7 @@ static const TypeInfo xio3130_upstream_info = {
     .name          = "x3130-upstream",
     .parent        = TYPE_PCIE_PORT,
     .class_init    = xio3130_upstream_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { }
     },
diff --git a/hw/pci-host/articia.c b/hw/pci-host/articia.c
index f3fcc49f81..cc65aac2a8 100644
--- a/hw/pci-host/articia.c
+++ b/hw/pci-host/articia.c
@@ -195,7 +195,7 @@ static void articia_realize(DeviceState *dev, Error **errp)
     qdev_init_gpio_out(dev, s->irq, ARRAY_SIZE(s->irq));
 }
 
-static void articia_class_init(ObjectClass *klass, void *data)
+static void articia_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -228,7 +228,7 @@ static void articia_pci_host_cfg_write(PCIDevice *d, uint32_t addr,
     }
 }
 
-static void articia_pci_host_class_init(ObjectClass *klass, void *data)
+static void articia_pci_host_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -246,7 +246,7 @@ static void articia_pci_host_class_init(ObjectClass *klass, void *data)
 
 /* TYPE_ARTICIA_PCI_BRIDGE */
 
-static void articia_pci_bridge_class_init(ObjectClass *klass, void *data)
+static void articia_pci_bridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -273,7 +273,7 @@ static const TypeInfo articia_types[] = {
         .parent        = TYPE_PCI_DEVICE,
         .instance_size = sizeof(ArticiaHostState),
         .class_init    = articia_pci_host_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
               { INTERFACE_CONVENTIONAL_PCI_DEVICE },
               { },
         },
@@ -283,7 +283,7 @@ static const TypeInfo articia_types[] = {
         .parent        = TYPE_PCI_DEVICE,
         .instance_size = sizeof(PCIDevice),
         .class_init    = articia_pci_bridge_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
               { INTERFACE_CONVENTIONAL_PCI_DEVICE },
               { },
         },
diff --git a/hw/pci-host/astro.c b/hw/pci-host/astro.c
index c6f2d4f494..859e308c57 100644
--- a/hw/pci-host/astro.c
+++ b/hw/pci-host/astro.c
@@ -482,7 +482,7 @@ static const VMStateDescription vmstate_elroy = {
     }
 };
 
-static void elroy_pcihost_class_init(ObjectClass *klass, void *data)
+static void elroy_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -909,7 +909,7 @@ static void astro_realize(DeviceState *obj, Error **errp)
     }
 }
 
-static void astro_class_init(ObjectClass *klass, void *data)
+static void astro_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -932,7 +932,7 @@ static const TypeInfo astro_chip_info = {
 };
 
 static void astro_iommu_memory_region_class_init(ObjectClass *klass,
-                                                   void *data)
+                                                 const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/pci-host/bonito.c b/hw/pci-host/bonito.c
index 4966914892..7d6251a78d 100644
--- a/hw/pci-host/bonito.c
+++ b/hw/pci-host/bonito.c
@@ -757,7 +757,7 @@ PCIBus *bonito_init(qemu_irq *pic)
     return phb->bus;
 }
 
-static void bonito_pci_class_init(ObjectClass *klass, void *data)
+static void bonito_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -783,13 +783,13 @@ static const TypeInfo bonito_pci_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIBonitoState),
     .class_init    = bonito_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-static void bonito_host_class_init(ObjectClass *klass, void *data)
+static void bonito_host_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/pci-host/designware.c b/hw/pci-host/designware.c
index 5598d18f47..183f838392 100644
--- a/hw/pci-host/designware.c
+++ b/hw/pci-host/designware.c
@@ -22,6 +22,7 @@
 #include "qapi/error.h"
 #include "qemu/module.h"
 #include "qemu/log.h"
+#include "qemu/bitops.h"
 #include "hw/pci/msi.h"
 #include "hw/pci/pci_bridge.h"
 #include "hw/pci/pci_host.h"
@@ -55,7 +56,8 @@
 #define DESIGNWARE_PCIE_ATU_DEVFN(x)               (((x) >> 16) & 0xff)
 #define DESIGNWARE_PCIE_ATU_UPPER_TARGET           0x91C
 
-static void designware_pcie_root_bus_class_init(ObjectClass *klass, void *data)
+static void designware_pcie_root_bus_class_init(ObjectClass *klass,
+                                                const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
@@ -162,11 +164,9 @@ designware_pcie_root_config_read(PCIDevice *d, uint32_t address, int len)
         break;
 
     case DESIGNWARE_PCIE_MSI_ADDR_LO:
-        val = root->msi.base;
-        break;
-
     case DESIGNWARE_PCIE_MSI_ADDR_HI:
-        val = root->msi.base >> 32;
+        val = extract64(root->msi.base,
+                        address == DESIGNWARE_PCIE_MSI_ADDR_LO ? 0 : 32, 32);
         break;
 
     case DESIGNWARE_PCIE_MSI_INTR0_ENABLE:
@@ -190,19 +190,16 @@ designware_pcie_root_config_read(PCIDevice *d, uint32_t address, int len)
         break;
 
     case DESIGNWARE_PCIE_ATU_LOWER_BASE:
-        val = viewport->base;
-        break;
-
     case DESIGNWARE_PCIE_ATU_UPPER_BASE:
-        val = viewport->base >> 32;
+        val = extract64(viewport->base,
+                        address == DESIGNWARE_PCIE_ATU_LOWER_BASE ? 0 : 32, 32);
         break;
 
     case DESIGNWARE_PCIE_ATU_LOWER_TARGET:
-        val = viewport->target;
-        break;
-
     case DESIGNWARE_PCIE_ATU_UPPER_TARGET:
-        val = viewport->target >> 32;
+        val = extract64(viewport->target,
+                        address == DESIGNWARE_PCIE_ATU_LOWER_TARGET ? 0 : 32,
+                        32);
         break;
 
     case DESIGNWARE_PCIE_ATU_LIMIT:
@@ -321,14 +318,10 @@ static void designware_pcie_root_config_write(PCIDevice *d, uint32_t address,
         break;
 
     case DESIGNWARE_PCIE_MSI_ADDR_LO:
-        root->msi.base &= 0xFFFFFFFF00000000ULL;
-        root->msi.base |= val;
-        designware_pcie_root_update_msi_mapping(root);
-        break;
-
     case DESIGNWARE_PCIE_MSI_ADDR_HI:
-        root->msi.base &= 0x00000000FFFFFFFFULL;
-        root->msi.base |= (uint64_t)val << 32;
+        root->msi.base = deposit64(root->msi.base,
+                                   address == DESIGNWARE_PCIE_MSI_ADDR_LO
+                                   ? 0 : 32, 32, val);
         designware_pcie_root_update_msi_mapping(root);
         break;
 
@@ -355,23 +348,17 @@ static void designware_pcie_root_config_write(PCIDevice *d, uint32_t address,
         break;
 
     case DESIGNWARE_PCIE_ATU_LOWER_BASE:
-        viewport->base &= 0xFFFFFFFF00000000ULL;
-        viewport->base |= val;
-        break;
-
     case DESIGNWARE_PCIE_ATU_UPPER_BASE:
-        viewport->base &= 0x00000000FFFFFFFFULL;
-        viewport->base |= (uint64_t)val << 32;
+        viewport->base = deposit64(root->msi.base,
+                                   address == DESIGNWARE_PCIE_ATU_LOWER_BASE
+                                   ? 0 : 32, 32, val);
         break;
 
     case DESIGNWARE_PCIE_ATU_LOWER_TARGET:
-        viewport->target &= 0xFFFFFFFF00000000ULL;
-        viewport->target |= val;
-        break;
-
     case DESIGNWARE_PCIE_ATU_UPPER_TARGET:
-        viewport->target &= 0x00000000FFFFFFFFULL;
-        viewport->target |= (uint64_t)val << 32;
+        viewport->target = deposit64(root->msi.base,
+                                     address == DESIGNWARE_PCIE_ATU_LOWER_TARGET
+                                     ? 0 : 32, 32, val);
         break;
 
     case DESIGNWARE_PCIE_ATU_LIMIT:
@@ -601,7 +588,8 @@ static const VMStateDescription vmstate_designware_pcie_root = {
     }
 };
 
-static void designware_pcie_root_class_init(ObjectClass *klass, void *data)
+static void designware_pcie_root_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -741,7 +729,8 @@ static const VMStateDescription vmstate_designware_pcie_host = {
     }
 };
 
-static void designware_pcie_host_class_init(ObjectClass *klass, void *data)
+static void designware_pcie_host_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
@@ -780,7 +769,7 @@ static const TypeInfo designware_pcie_types[] = {
         .parent         = TYPE_PCI_BRIDGE,
         .instance_size  = sizeof(DesignwarePCIERoot),
         .class_init     = designware_pcie_root_class_init,
-        .interfaces     = (InterfaceInfo[]) {
+        .interfaces     = (const InterfaceInfo[]) {
             { INTERFACE_PCIE_DEVICE },
             { }
         },
diff --git a/hw/pci-host/dino.c b/hw/pci-host/dino.c
index 58fdbf7bc9..11b353be2e 100644
--- a/hw/pci-host/dino.c
+++ b/hw/pci-host/dino.c
@@ -497,7 +497,7 @@ static const Property dino_pcihost_properties[] = {
                      MemoryRegion *),
 };
 
-static void dino_pcihost_class_init(ObjectClass *klass, void *data)
+static void dino_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/pci-host/fsl_imx8m_phy.c b/hw/pci-host/fsl_imx8m_phy.c
index aa304b102b..04da3f99a0 100644
--- a/hw/pci-host/fsl_imx8m_phy.c
+++ b/hw/pci-host/fsl_imx8m_phy.c
@@ -76,7 +76,7 @@ static const VMStateDescription fsl_imx8m_pcie_phy_vmstate = {
     }
 };
 
-static void fsl_imx8m_pcie_phy_class_init(ObjectClass *klass, void *data)
+static void fsl_imx8m_pcie_phy_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/pci-host/gpex.c b/hw/pci-host/gpex.c
index 9fcedd7fc5..b806a2286f 100644
--- a/hw/pci-host/gpex.c
+++ b/hw/pci-host/gpex.c
@@ -192,7 +192,7 @@ static const Property gpex_host_properties[] = {
     DEFINE_PROP_UINT8("num-irqs", GPEXHost, num_irqs, PCI_NUM_PINS),
 };
 
-static void gpex_host_class_init(ObjectClass *klass, void *data)
+static void gpex_host_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
@@ -237,7 +237,7 @@ static const VMStateDescription vmstate_gpex_root = {
     }
 };
 
-static void gpex_root_class_init(ObjectClass *klass, void *data)
+static void gpex_root_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -261,7 +261,7 @@ static const TypeInfo gpex_root_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(GPEXRootState),
     .class_init = gpex_root_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/pci-host/grackle.c b/hw/pci-host/grackle.c
index 84e5ee8c6e..f9da5a908c 100644
--- a/hw/pci-host/grackle.c
+++ b/hw/pci-host/grackle.c
@@ -94,7 +94,7 @@ static void grackle_pci_realize(PCIDevice *d, Error **errp)
     d->config[PCI_CLASS_PROG] = 0x01;
 }
 
-static void grackle_pci_class_init(ObjectClass *klass, void *data)
+static void grackle_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -116,7 +116,7 @@ static const TypeInfo grackle_pci_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = grackle_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -133,7 +133,7 @@ static const Property grackle_properties[] = {
     DEFINE_PROP_UINT32("ofw-addr", GrackleState, ofw_addr, -1),
 };
 
-static void grackle_class_init(ObjectClass *klass, void *data)
+static void grackle_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
diff --git a/hw/pci-host/gt64120.c b/hw/pci-host/gt64120.c
index d5c13a89b6..56a6ef93b7 100644
--- a/hw/pci-host/gt64120.c
+++ b/hw/pci-host/gt64120.c
@@ -1244,7 +1244,7 @@ static void gt64120_pci_reset_hold(Object *obj, ResetType type)
     pci_set_byte(d->config + 0x3d, 0x01);
 }
 
-static void gt64120_pci_class_init(ObjectClass *klass, void *data)
+static void gt64120_pci_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -1268,7 +1268,7 @@ static const TypeInfo gt64120_pci_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init    = gt64120_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -1279,7 +1279,7 @@ static const Property gt64120_properties[] = {
                      cpu_little_endian, false),
 };
 
-static void gt64120_class_init(ObjectClass *klass, void *data)
+static void gt64120_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/pci-host/i440fx.c b/hw/pci-host/i440fx.c
index 1e69691c6d..e13bb1b53e 100644
--- a/hw/pci-host/i440fx.c
+++ b/hw/pci-host/i440fx.c
@@ -315,7 +315,7 @@ static void i440fx_pcihost_realize(DeviceState *dev, Error **errp)
     i440fx_update_memory_mappings(f);
 }
 
-static void i440fx_class_init(ObjectClass *klass, void *data)
+static void i440fx_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -341,7 +341,7 @@ static const TypeInfo i440fx_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCII440FXState),
     .class_init    = i440fx_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -364,7 +364,7 @@ static const Property i440fx_props[] = {
     DEFINE_PROP_STRING(I440FX_HOST_PROP_PCI_TYPE, I440FXState, pci_type),
 };
 
-static void i440fx_pcihost_class_init(ObjectClass *klass, void *data)
+static void i440fx_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
diff --git a/hw/pci-host/mv64361.c b/hw/pci-host/mv64361.c
index a297318c6e..e05b677010 100644
--- a/hw/pci-host/mv64361.c
+++ b/hw/pci-host/mv64361.c
@@ -26,7 +26,7 @@
 
 #define TYPE_MV64361_PCI_BRIDGE "mv64361-pcibridge"
 
-static void mv64361_pcibridge_class_init(ObjectClass *klass, void *data)
+static void mv64361_pcibridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -46,7 +46,7 @@ static const TypeInfo mv64361_pcibridge_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init    = mv64361_pcibridge_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -102,7 +102,7 @@ static const Property mv64361_pcihost_props[] = {
     DEFINE_PROP_UINT8("index", MV64361PCIState, index, 0),
 };
 
-static void mv64361_pcihost_class_init(ObjectClass *klass, void *data)
+static void mv64361_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -923,7 +923,7 @@ static void mv64361_reset(DeviceState *dev)
     set_mem_windows(s, 0xfbfff);
 }
 
-static void mv64361_class_init(ObjectClass *klass, void *data)
+static void mv64361_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/pci-host/pnv_phb.c b/hw/pci-host/pnv_phb.c
index 6c1e76fbbb..4b0ced79b0 100644
--- a/hw/pci-host/pnv_phb.c
+++ b/hw/pci-host/pnv_phb.c
@@ -194,7 +194,7 @@ static const Property pnv_phb_properties[] = {
                      PnvPhb4PecState *),
 };
 
-static void pnv_phb_class_init(ObjectClass *klass, void *data)
+static void pnv_phb_class_init(ObjectClass *klass, const void *data)
 {
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -304,7 +304,7 @@ static const Property pnv_phb_root_port_properties[] = {
     DEFINE_PROP_UINT32("version", PnvPHBRootPort, version, 0),
 };
 
-static void pnv_phb_root_port_class_init(ObjectClass *klass, void *data)
+static void pnv_phb_root_port_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/pci-host/pnv_phb3.c b/hw/pci-host/pnv_phb3.c
index 82884e1e92..a4335f44f2 100644
--- a/hw/pci-host/pnv_phb3.c
+++ b/hw/pci-host/pnv_phb3.c
@@ -888,7 +888,7 @@ DECLARE_INSTANCE_CHECKER(IOMMUMemoryRegion, PNV_PHB3_IOMMU_MEMORY_REGION,
                          TYPE_PNV_PHB3_IOMMU_MEMORY_REGION)
 
 static void pnv_phb3_iommu_memory_region_class_init(ObjectClass *klass,
-                                                    void *data)
+                                                    const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
@@ -1097,7 +1097,7 @@ static const Property pnv_phb3_properties[] = {
     DEFINE_PROP_LINK("phb-base", PnvPHB3, phb_base, TYPE_PNV_PHB, PnvPHB *),
 };
 
-static void pnv_phb3_class_init(ObjectClass *klass, void *data)
+static void pnv_phb3_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1149,7 +1149,7 @@ static void pnv_phb3_root_bus_set_prop(Object *obj, Visitor *v,
     }
 }
 
-static void pnv_phb3_root_bus_class_init(ObjectClass *klass, void *data)
+static void pnv_phb3_root_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
diff --git a/hw/pci-host/pnv_phb3_msi.c b/hw/pci-host/pnv_phb3_msi.c
index 81986644b1..3a83311faf 100644
--- a/hw/pci-host/pnv_phb3_msi.c
+++ b/hw/pci-host/pnv_phb3_msi.c
@@ -284,7 +284,7 @@ static void phb3_msi_instance_init(Object *obj)
     ics->offset = 0;
 }
 
-static void phb3_msi_class_init(ObjectClass *klass, void *data)
+static void phb3_msi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ICSStateClass *isc = ICS_CLASS(klass);
diff --git a/hw/pci-host/pnv_phb3_pbcq.c b/hw/pci-host/pnv_phb3_pbcq.c
index 82f70efa43..1f7a149580 100644
--- a/hw/pci-host/pnv_phb3_pbcq.c
+++ b/hw/pci-host/pnv_phb3_pbcq.c
@@ -337,7 +337,7 @@ static void phb3_pbcq_instance_init(Object *obj)
                              OBJ_PROP_LINK_STRONG);
 }
 
-static void pnv_pbcq_class_init(ObjectClass *klass, void *data)
+static void pnv_pbcq_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
@@ -354,7 +354,7 @@ static const TypeInfo pnv_pbcq_type_info = {
     .instance_size = sizeof(PnvPBCQState),
     .instance_init = phb3_pbcq_instance_init,
     .class_init    = pnv_pbcq_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
diff --git a/hw/pci-host/pnv_phb4.c b/hw/pci-host/pnv_phb4.c
index 178c73f519..77ea35299d 100644
--- a/hw/pci-host/pnv_phb4.c
+++ b/hw/pci-host/pnv_phb4.c
@@ -1362,7 +1362,7 @@ DECLARE_INSTANCE_CHECKER(IOMMUMemoryRegion, PNV_PHB4_IOMMU_MEMORY_REGION,
                          TYPE_PNV_PHB4_IOMMU_MEMORY_REGION)
 
 static void pnv_phb4_iommu_memory_region_class_init(ObjectClass *klass,
-                                                    void *data)
+                                                    const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
@@ -1696,7 +1696,7 @@ static const Property pnv_phb4_properties[] = {
     DEFINE_PROP_LINK("phb-base", PnvPHB4, phb_base, TYPE_PNV_PHB, PnvPHB *),
 };
 
-static void pnv_phb4_class_init(ObjectClass *klass, void *data)
+static void pnv_phb4_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XiveNotifierClass *xfc = XIVE_NOTIFIER_CLASS(klass);
@@ -1714,7 +1714,7 @@ static const TypeInfo pnv_phb4_type_info = {
     .instance_init = pnv_phb4_instance_init,
     .instance_size = sizeof(PnvPHB4),
     .class_init    = pnv_phb4_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
             { TYPE_XIVE_NOTIFIER },
             { },
     }
@@ -1761,7 +1761,7 @@ static void pnv_phb4_root_bus_set_prop(Object *obj, Visitor *v,
     }
 }
 
-static void pnv_phb4_root_bus_class_init(ObjectClass *klass, void *data)
+static void pnv_phb4_root_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
diff --git a/hw/pci-host/pnv_phb4_pec.c b/hw/pci-host/pnv_phb4_pec.c
index cb8a7e3afa..5bac1c42ed 100644
--- a/hw/pci-host/pnv_phb4_pec.c
+++ b/hw/pci-host/pnv_phb4_pec.c
@@ -354,7 +354,7 @@ static uint32_t pnv_pec_xscom_nest_base(PnvPhb4PecState *pec)
  */
 static const uint32_t pnv_pec_num_phbs[] = { 1, 2, 3 };
 
-static void pnv_pec_class_init(ObjectClass *klass, void *data)
+static void pnv_pec_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
@@ -388,7 +388,7 @@ static const TypeInfo pnv_pec_type_info = {
     .instance_size = sizeof(PnvPhb4PecState),
     .class_init    = pnv_pec_class_init,
     .class_size    = sizeof(PnvPhb4PecClass),
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
@@ -419,7 +419,7 @@ static uint32_t pnv_phb5_pec_xscom_nest_base(PnvPhb4PecState *pec)
  */
 static const uint32_t pnv_phb5_pec_num_stacks[] = { 3, 3 };
 
-static void pnv_phb5_pec_class_init(ObjectClass *klass, void *data)
+static void pnv_phb5_pec_class_init(ObjectClass *klass, const void *data)
 {
     PnvPhb4PecClass *pecc = PNV_PHB4_PEC_CLASS(klass);
     static const char compat[] = "ibm,power10-pbcq";
@@ -445,7 +445,7 @@ static const TypeInfo pnv_phb5_pec_type_info = {
     .instance_size = sizeof(PnvPhb4PecState),
     .class_init    = pnv_phb5_pec_class_init,
     .class_size    = sizeof(PnvPhb4PecClass),
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
diff --git a/hw/pci-host/ppc440_pcix.c b/hw/pci-host/ppc440_pcix.c
index 07924bce28..744b85e49c 100644
--- a/hw/pci-host/ppc440_pcix.c
+++ b/hw/pci-host/ppc440_pcix.c
@@ -519,7 +519,7 @@ static void ppc440_pcix_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void ppc440_pcix_class_init(ObjectClass *klass, void *data)
+static void ppc440_pcix_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/pci-host/ppc4xx_pci.c b/hw/pci-host/ppc4xx_pci.c
index 292cb308ba..2547817688 100644
--- a/hw/pci-host/ppc4xx_pci.c
+++ b/hw/pci-host/ppc4xx_pci.c
@@ -349,7 +349,7 @@ static void ppc4xx_pcihost_realize(DeviceState *dev, Error **errp)
     qemu_register_reset(ppc4xx_pci_reset, s);
 }
 
-static void ppc4xx_host_bridge_class_init(ObjectClass *klass, void *data)
+static void ppc4xx_host_bridge_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -370,13 +370,13 @@ static const TypeInfo ppc4xx_host_bridge_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init    = ppc4xx_host_bridge_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-static void ppc4xx_pcihost_class_init(ObjectClass *klass, void *data)
+static void ppc4xx_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/pci-host/ppce500.c b/hw/pci-host/ppce500.c
index 9b905d1971..e97a515d5f 100644
--- a/hw/pci-host/ppce500.c
+++ b/hw/pci-host/ppce500.c
@@ -490,7 +490,7 @@ static void e500_pcihost_realize(DeviceState *dev, Error **errp)
     pci_bus_set_route_irq_fn(b, e500_route_intx_pin_to_irq);
 }
 
-static void e500_host_bridge_class_init(ObjectClass *klass, void *data)
+static void e500_host_bridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -512,7 +512,7 @@ static const Property pcihost_properties[] = {
     DEFINE_PROP_UINT32("first_pin_irq", PPCE500PCIState, first_pin_irq, 0x1),
 };
 
-static void e500_pcihost_class_init(ObjectClass *klass, void *data)
+static void e500_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -528,7 +528,7 @@ static const TypeInfo e500_pci_types[] = {
         .parent        = TYPE_PCI_DEVICE,
         .instance_size = sizeof(PPCE500PCIBridgeState),
         .class_init    = e500_host_bridge_class_init,
-        .interfaces    = (InterfaceInfo[]) {
+        .interfaces    = (const InterfaceInfo[]) {
             { INTERFACE_CONVENTIONAL_PCI_DEVICE },
             { },
         },
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index 06be3d77cb..1951ae440c 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -184,7 +184,7 @@ static const Property q35_host_props[] = {
     DEFINE_PROP_BOOL("x-pci-hole64-fix", Q35PCIHost, pci_hole64_fix, true),
 };
 
-static void q35_host_class_init(ObjectClass *klass, void *data)
+static void q35_host_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
@@ -667,7 +667,7 @@ static const Property mch_props[] = {
     DEFINE_PROP_BOOL("smbase-smram", MCHPCIState, has_smram_at_smbase, true),
 };
 
-static void mch_class_init(ObjectClass *klass, void *data)
+static void mch_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -703,7 +703,7 @@ static const TypeInfo mch_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(MCHPCIState),
     .class_init = mch_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index e3d8d206b7..21f7ca65e0 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -392,7 +392,7 @@ static const VMStateDescription vmstate_raven = {
     },
 };
 
-static void raven_class_init(ObjectClass *klass, void *data)
+static void raven_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -416,7 +416,7 @@ static const TypeInfo raven_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(RavenPCIState),
     .class_init = raven_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -431,7 +431,7 @@ static const Property raven_pcihost_properties[] = {
                      false),
 };
 
-static void raven_pcihost_class_init(ObjectClass *klass, void *data)
+static void raven_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/pci-host/remote.c b/hw/pci-host/remote.c
index be077d075e..e6d2af4502 100644
--- a/hw/pci-host/remote.c
+++ b/hw/pci-host/remote.c
@@ -46,7 +46,7 @@ static void remote_pcihost_realize(DeviceState *dev, Error **errp)
                                 0, TYPE_PCIE_BUS);
 }
 
-static void remote_pcihost_class_init(ObjectClass *klass, void *data)
+static void remote_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
diff --git a/hw/pci-host/sabre.c b/hw/pci-host/sabre.c
index be6641de15..538624c507 100644
--- a/hw/pci-host/sabre.c
+++ b/hw/pci-host/sabre.c
@@ -456,7 +456,7 @@ static void sabre_pci_realize(PCIDevice *d, Error **errp)
                  PCI_STATUS_DEVSEL_MEDIUM);
 }
 
-static void sabre_pci_class_init(ObjectClass *klass, void *data)
+static void sabre_pci_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -477,7 +477,7 @@ static const TypeInfo sabre_pci_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(SabrePCIState),
     .class_init    = sabre_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -497,7 +497,7 @@ static const Property sabre_properties[] = {
     DEFINE_PROP_UINT64("mem-base", SabreState, mem_base, 0),
 };
 
-static void sabre_class_init(ObjectClass *klass, void *data)
+static void sabre_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
diff --git a/hw/pci-host/sh_pci.c b/hw/pci-host/sh_pci.c
index 4edebced5e..de8f6a84aa 100644
--- a/hw/pci-host/sh_pci.c
+++ b/hw/pci-host/sh_pci.c
@@ -153,7 +153,7 @@ static void sh_pcic_pci_realize(PCIDevice *d, Error **errp)
                  PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM);
 }
 
-static void sh_pcic_pci_class_init(ObjectClass *klass, void *data)
+static void sh_pcic_pci_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -168,7 +168,7 @@ static void sh_pcic_pci_class_init(ObjectClass *klass, void *data)
     dc->user_creatable = false;
 }
 
-static void sh_pcic_host_class_init(ObjectClass *klass, void *data)
+static void sh_pcic_host_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -186,7 +186,7 @@ static const TypeInfo sh_pcic_types[] = {
         .parent         = TYPE_PCI_DEVICE,
         .instance_size  = sizeof(PCIDevice),
         .class_init     = sh_pcic_pci_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { INTERFACE_CONVENTIONAL_PCI_DEVICE },
             { },
         },
diff --git a/hw/pci-host/uninorth.c b/hw/pci-host/uninorth.c
index 37e2461bbb..194037d6e7 100644
--- a/hw/pci-host/uninorth.c
+++ b/hw/pci-host/uninorth.c
@@ -311,7 +311,7 @@ static void unin_internal_pci_host_realize(PCIDevice *d, Error **errp)
     d->config[PCI_CAPABILITY_LIST] = 0x00;
 }
 
-static void unin_main_pci_host_class_init(ObjectClass *klass, void *data)
+static void unin_main_pci_host_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -333,13 +333,13 @@ static const TypeInfo unin_main_pci_host_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = unin_main_pci_host_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-static void u3_agp_pci_host_class_init(ObjectClass *klass, void *data)
+static void u3_agp_pci_host_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -361,13 +361,13 @@ static const TypeInfo u3_agp_pci_host_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = u3_agp_pci_host_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-static void unin_agp_pci_host_class_init(ObjectClass *klass, void *data)
+static void unin_agp_pci_host_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -389,13 +389,14 @@ static const TypeInfo unin_agp_pci_host_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = unin_agp_pci_host_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-static void unin_internal_pci_host_class_init(ObjectClass *klass, void *data)
+static void unin_internal_pci_host_class_init(ObjectClass *klass,
+                                              const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -417,7 +418,7 @@ static const TypeInfo unin_internal_pci_host_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = unin_internal_pci_host_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -427,7 +428,7 @@ static const Property pci_unin_main_pci_host_props[] = {
     DEFINE_PROP_UINT32("ofw-addr", UNINHostState, ofw_addr, -1),
 };
 
-static void pci_unin_main_class_init(ObjectClass *klass, void *data)
+static void pci_unin_main_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
@@ -447,7 +448,7 @@ static const TypeInfo pci_unin_main_info = {
     .class_init    = pci_unin_main_class_init,
 };
 
-static void pci_u3_agp_class_init(ObjectClass *klass, void *data)
+static void pci_u3_agp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -463,7 +464,7 @@ static const TypeInfo pci_u3_agp_info = {
     .class_init    = pci_u3_agp_class_init,
 };
 
-static void pci_unin_agp_class_init(ObjectClass *klass, void *data)
+static void pci_unin_agp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -479,7 +480,7 @@ static const TypeInfo pci_unin_agp_info = {
     .class_init    = pci_unin_agp_class_init,
 };
 
-static void pci_unin_internal_class_init(ObjectClass *klass, void *data)
+static void pci_unin_internal_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -535,7 +536,7 @@ static void unin_init(Object *obj)
     sysbus_init_mmio(sbd, &s->mem);
 }
 
-static void unin_class_init(ObjectClass *klass, void *data)
+static void unin_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/pci-host/versatile.c b/hw/pci-host/versatile.c
index 33a8ceb3b5..8ea26e3ff0 100644
--- a/hw/pci-host/versatile.c
+++ b/hw/pci-host/versatile.c
@@ -471,7 +471,7 @@ static void versatile_pci_host_realize(PCIDevice *d, Error **errp)
     pci_set_byte(d->config + PCI_LATENCY_TIMER, 0x10);
 }
 
-static void versatile_pci_host_class_init(ObjectClass *klass, void *data)
+static void versatile_pci_host_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -492,7 +492,7 @@ static const TypeInfo versatile_pci_host_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init    = versatile_pci_host_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -503,7 +503,7 @@ static const Property pci_vpb_properties[] = {
                       PCI_VPB_IRQMAP_ASSUME_OK),
 };
 
-static void pci_vpb_class_init(ObjectClass *klass, void *data)
+static void pci_vpb_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/pci-host/xen_igd_pt.c b/hw/pci-host/xen_igd_pt.c
index d094b675d6..5dd17ef236 100644
--- a/hw/pci-host/xen_igd_pt.c
+++ b/hw/pci-host/xen_igd_pt.c
@@ -95,7 +95,8 @@ static void igd_pt_i440fx_realize(PCIDevice *pci_dev, Error **errp)
     }
 }
 
-static void igd_passthrough_i440fx_class_init(ObjectClass *klass, void *data)
+static void igd_passthrough_i440fx_class_init(ObjectClass *klass,
+                                              const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/pci-host/xilinx-pcie.c b/hw/pci-host/xilinx-pcie.c
index 18688485f4..c71492de9e 100644
--- a/hw/pci-host/xilinx-pcie.c
+++ b/hw/pci-host/xilinx-pcie.c
@@ -165,7 +165,7 @@ static const Property xilinx_pcie_host_props[] = {
     DEFINE_PROP_BOOL("link_up", XilinxPCIEHost, link_up, true),
 };
 
-static void xilinx_pcie_host_class_init(ObjectClass *klass, void *data)
+static void xilinx_pcie_host_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
@@ -286,7 +286,7 @@ static void xilinx_pcie_root_realize(PCIDevice *pci_dev, Error **errp)
     }
 }
 
-static void xilinx_pcie_root_class_init(ObjectClass *klass, void *data)
+static void xilinx_pcie_root_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -314,7 +314,7 @@ static const TypeInfo xilinx_pcie_root_info = {
     .parent = TYPE_PCI_BRIDGE,
     .instance_size = sizeof(XilinxPCIERoot),
     .class_init = xilinx_pcie_root_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { }
     },
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 2844ec5556..fe38c4c028 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -261,7 +261,7 @@ static GByteArray *pci_bus_fw_cfg_gen_data(Object *obj, Error **errp)
     return byte_array;
 }
 
-static void pci_bus_class_init(ObjectClass *klass, void *data)
+static void pci_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
     PCIBusClass *pbc = PCI_BUS_CLASS(klass);
@@ -288,7 +288,7 @@ static const TypeInfo pci_bus_info = {
     .instance_size = sizeof(PCIBus),
     .class_size = sizeof(PCIBusClass),
     .class_init = pci_bus_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_FW_CFG_DATA_GENERATOR_INTERFACE },
         { }
     }
@@ -309,7 +309,7 @@ static const TypeInfo conventional_pci_interface_info = {
     .parent        = TYPE_INTERFACE,
 };
 
-static void pcie_bus_class_init(ObjectClass *klass, void *data)
+static void pcie_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
@@ -2795,7 +2795,7 @@ MemoryRegion *pci_address_space_io(PCIDevice *dev)
     return pci_get_bus(dev)->address_space_io;
 }
 
-static void pci_device_class_init(ObjectClass *klass, void *data)
+static void pci_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
 
@@ -2809,7 +2809,7 @@ static void pci_device_class_init(ObjectClass *klass, void *data)
         "access to indirect DMA memory");
 }
 
-static void pci_device_class_base_init(ObjectClass *klass, void *data)
+static void pci_device_class_base_init(ObjectClass *klass, const void *data)
 {
     if (!object_class_is_abstract(klass)) {
         ObjectClass *conventional =
diff --git a/hw/pci/pci_bridge.c b/hw/pci/pci_bridge.c
index aee4dd7d1f..76255c4cd8 100644
--- a/hw/pci/pci_bridge.c
+++ b/hw/pci/pci_bridge.c
@@ -482,7 +482,7 @@ static const Property pci_bridge_properties[] = {
                      pcie_writeable_slt_bug, false),
 };
 
-static void pci_bridge_class_init(ObjectClass *klass, void *data)
+static void pci_bridge_class_init(ObjectClass *klass, const void *data)
 {
     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
     DeviceClass *k = DEVICE_CLASS(klass);
@@ -497,7 +497,7 @@ static const TypeInfo pci_bridge_type_info = {
     .instance_size = sizeof(PCIBridge),
     .class_init = pci_bridge_class_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
diff --git a/hw/pci/pci_host.c b/hw/pci/pci_host.c
index 80f91f409f..abe83bbab8 100644
--- a/hw/pci/pci_host.c
+++ b/hw/pci/pci_host.c
@@ -246,7 +246,7 @@ static const Property pci_host_properties_common[] = {
     DEFINE_PROP_BOOL(PCI_HOST_BYPASS_IOMMU, PCIHostState, bypass_iommu, false),
 };
 
-static void pci_host_class_init(ObjectClass *klass, void *data)
+static void pci_host_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     device_class_set_props(dc, pci_host_properties_common);
diff --git a/hw/pci/pcie_port.c b/hw/pci/pcie_port.c
index c73db30e98..54f639e3d4 100644
--- a/hw/pci/pcie_port.c
+++ b/hw/pci/pcie_port.c
@@ -118,7 +118,7 @@ static const Property pcie_port_props[] = {
                        PCIE_AER_LOG_MAX_DEFAULT),
 };
 
-static void pcie_port_class_init(ObjectClass *oc, void *data)
+static void pcie_port_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -211,7 +211,7 @@ static const Property pcie_slot_props[] = {
                      hide_native_hotplug_cap, false),
 };
 
-static void pcie_slot_class_init(ObjectClass *oc, void *data)
+static void pcie_slot_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
@@ -230,7 +230,7 @@ static const TypeInfo pcie_slot_type_info = {
     .instance_size = sizeof(PCIESlot),
     .abstract = true,
     .class_init = pcie_slot_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
diff --git a/hw/ppc/amigaone.c b/hw/ppc/amigaone.c
index e9407a51b5..12279f42bc 100644
--- a/hw/ppc/amigaone.c
+++ b/hw/ppc/amigaone.c
@@ -173,7 +173,7 @@ static const Property nvram_properties[] = {
     DEFINE_PROP_DRIVE("drive", A1NVRAMState, blk),
 };
 
-static void nvram_class_init(ObjectClass *oc, void *data)
+static void nvram_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ppc/e500plat.c b/hw/ppc/e500plat.c
index 70a8033373..775b9d8da0 100644
--- a/hw/ppc/e500plat.c
+++ b/hw/ppc/e500plat.c
@@ -68,7 +68,7 @@ HotplugHandler *e500plat_machine_get_hotpug_handler(MachineState *machine,
 
 #define TYPE_E500PLAT_MACHINE  MACHINE_TYPE_NAME("ppce500")
 
-static void e500plat_machine_class_init(ObjectClass *oc, void *data)
+static void e500plat_machine_class_init(ObjectClass *oc, const void *data)
 {
     PPCE500MachineClass *pmc = PPCE500_MACHINE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
@@ -107,7 +107,7 @@ static const TypeInfo e500plat_info = {
     .name          = TYPE_E500PLAT_MACHINE,
     .parent        = TYPE_PPCE500_MACHINE,
     .class_init    = e500plat_machine_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
          { TYPE_HOTPLUG_HANDLER },
          { }
     }
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index 5a827846ed..0b6e096116 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -563,7 +563,7 @@ static int core99_kvm_type(MachineState *machine, const char *arg)
     return 2;
 }
 
-static void core99_machine_class_init(ObjectClass *oc, void *data)
+static void core99_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(oc);
@@ -639,7 +639,7 @@ static const TypeInfo core99_machine_info = {
     .class_init    = core99_machine_class_init,
     .instance_init = core99_instance_init,
     .instance_size = sizeof(Core99MachineState),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_FW_PATH_PROVIDER },
         { }
     },
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 0d34e6bfda..40ae936ad8 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -402,7 +402,7 @@ static int heathrow_kvm_type(MachineState *machine, const char *arg)
     return 2;
 }
 
-static void heathrow_class_init(ObjectClass *oc, void *data)
+static void heathrow_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(oc);
@@ -430,7 +430,7 @@ static const TypeInfo ppc_heathrow_machine_info = {
     .name          = MACHINE_TYPE_NAME("g3beige"),
     .parent        = TYPE_MACHINE,
     .class_init    = heathrow_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_FW_PATH_PROVIDER },
         { }
     },
diff --git a/hw/ppc/mpc8544ds.c b/hw/ppc/mpc8544ds.c
index d74af766ee..97fb0f35ba 100644
--- a/hw/ppc/mpc8544ds.c
+++ b/hw/ppc/mpc8544ds.c
@@ -37,7 +37,7 @@ static void mpc8544ds_init(MachineState *machine)
     ppce500_init(machine);
 }
 
-static void mpc8544ds_machine_class_init(ObjectClass *oc, void *data)
+static void mpc8544ds_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     PPCE500MachineClass *pmc = PPCE500_MACHINE_CLASS(oc);
diff --git a/hw/ppc/pef.c b/hw/ppc/pef.c
index 8b2d726e00..254f570787 100644
--- a/hw/ppc/pef.c
+++ b/hw/ppc/pef.c
@@ -128,7 +128,7 @@ OBJECT_DEFINE_TYPE_WITH_INTERFACES(PefGuest,
                                    { TYPE_USER_CREATABLE },
                                    { NULL })
 
-static void pef_guest_class_init(ObjectClass *oc, void *data)
+static void pef_guest_class_init(ObjectClass *oc, const void *data)
 {
     ConfidentialGuestSupportClass *klass = CONFIDENTIAL_GUEST_SUPPORT_CLASS(oc);
 
diff --git a/hw/ppc/pegasos2.c b/hw/ppc/pegasos2.c
index 7b2dc6985c..e15cf96427 100644
--- a/hw/ppc/pegasos2.c
+++ b/hw/ppc/pegasos2.c
@@ -588,7 +588,7 @@ static bool pegasos2_setprop(MachineState *ms, const char *path,
     return true;
 }
 
-static void pegasos2_machine_class_init(ObjectClass *oc, void *data)
+static void pegasos2_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     PPCVirtualHypervisorClass *vhc = PPC_VIRTUAL_HYPERVISOR_CLASS(oc);
@@ -619,7 +619,7 @@ static const TypeInfo pegasos2_machine_info = {
     .parent        = TYPE_MACHINE,
     .class_init    = pegasos2_machine_class_init,
     .instance_size = sizeof(Pegasos2MachineState),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_PPC_VIRTUAL_HYPERVISOR },
         { TYPE_VOF_MACHINE_IF },
         { }
diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 63f2232f32..4a49e9d1a8 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -1618,7 +1618,7 @@ static uint32_t pnv_chip_power8_xscom_pcba(PnvChip *chip, uint64_t addr)
     return ((addr >> 4) & ~0xfull) | ((addr >> 3) & 0xf);
 }
 
-static void pnv_chip_power8e_class_init(ObjectClass *klass, void *data)
+static void pnv_chip_power8e_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvChipClass *k = PNV_CHIP_CLASS(klass);
@@ -1642,7 +1642,7 @@ static void pnv_chip_power8e_class_init(ObjectClass *klass, void *data)
                                     &k->parent_realize);
 }
 
-static void pnv_chip_power8_class_init(ObjectClass *klass, void *data)
+static void pnv_chip_power8_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvChipClass *k = PNV_CHIP_CLASS(klass);
@@ -1666,7 +1666,7 @@ static void pnv_chip_power8_class_init(ObjectClass *klass, void *data)
                                     &k->parent_realize);
 }
 
-static void pnv_chip_power8nvl_class_init(ObjectClass *klass, void *data)
+static void pnv_chip_power8nvl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvChipClass *k = PNV_CHIP_CLASS(klass);
@@ -1954,7 +1954,7 @@ static uint32_t pnv_chip_power9_xscom_pcba(PnvChip *chip, uint64_t addr)
     return addr >> 3;
 }
 
-static void pnv_chip_power9_class_init(ObjectClass *klass, void *data)
+static void pnv_chip_power9_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvChipClass *k = PNV_CHIP_CLASS(klass);
@@ -2302,7 +2302,7 @@ static uint32_t pnv_chip_power10_xscom_pcba(PnvChip *chip, uint64_t addr)
     return addr >> 3;
 }
 
-static void pnv_chip_power10_class_init(ObjectClass *klass, void *data)
+static void pnv_chip_power10_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvChipClass *k = PNV_CHIP_CLASS(klass);
@@ -2461,7 +2461,7 @@ static const Property pnv_chip_properties[] = {
     DEFINE_PROP_BOOL("lpar-per-core", PnvChip, lpar_per_core, false),
 };
 
-static void pnv_chip_class_init(ObjectClass *klass, void *data)
+static void pnv_chip_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -2724,7 +2724,7 @@ static void pnv_machine_set_hb(Object *obj, bool value, Error **errp)
     }
 }
 
-static void pnv_machine_power8_class_init(ObjectClass *oc, void *data)
+static void pnv_machine_power8_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     XICSFabricClass *xic = XICS_FABRIC_CLASS(oc);
@@ -2753,7 +2753,7 @@ static void pnv_machine_power8_class_init(ObjectClass *oc, void *data)
     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_PNV_PHB);
 }
 
-static void pnv_machine_power9_class_init(ObjectClass *oc, void *data)
+static void pnv_machine_power9_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     XiveFabricClass *xfc = XIVE_FABRIC_CLASS(oc);
@@ -2792,7 +2792,7 @@ static void pnv_machine_power9_class_init(ObjectClass *oc, void *data)
                               "Use 1 LPAR per core mode");
 }
 
-static void pnv_machine_p10_common_class_init(ObjectClass *oc, void *data)
+static void pnv_machine_p10_common_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     PnvMachineClass *pmc = PNV_MACHINE_CLASS(oc);
@@ -2822,7 +2822,7 @@ static void pnv_machine_p10_common_class_init(ObjectClass *oc, void *data)
     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_PNV_PHB);
 }
 
-static void pnv_machine_power10_class_init(ObjectClass *oc, void *data)
+static void pnv_machine_power10_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -2847,7 +2847,8 @@ static void pnv_machine_power10_class_init(ObjectClass *oc, void *data)
                               "Use 1 LPAR per core mode");
 }
 
-static void pnv_machine_p10_rainier_class_init(ObjectClass *oc, void *data)
+static void pnv_machine_p10_rainier_class_init(ObjectClass *oc,
+                                               const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     PnvMachineClass *pmc = PNV_MACHINE_CLASS(oc);
@@ -2912,7 +2913,7 @@ static void pnv_nmi(NMIState *n, int cpu_index, Error **errp)
     }
 }
 
-static void pnv_machine_class_init(ObjectClass *oc, void *data)
+static void pnv_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     InterruptStatsProviderClass *ispc = INTERRUPT_STATS_PROVIDER_CLASS(oc);
@@ -2972,7 +2973,7 @@ static const TypeInfo types[] = {
         .name          = MACHINE_TYPE_NAME("powernv10"),
         .parent        = TYPE_PNV_MACHINE,
         .class_init    = pnv_machine_power10_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { TYPE_XIVE_FABRIC },
             { },
         },
@@ -2981,7 +2982,7 @@ static const TypeInfo types[] = {
         .name          = MACHINE_TYPE_NAME("powernv9"),
         .parent        = TYPE_PNV_MACHINE,
         .class_init    = pnv_machine_power9_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { TYPE_XIVE_FABRIC },
             { },
         },
@@ -2990,7 +2991,7 @@ static const TypeInfo types[] = {
         .name          = MACHINE_TYPE_NAME("powernv8"),
         .parent        = TYPE_PNV_MACHINE,
         .class_init    = pnv_machine_power8_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { TYPE_XICS_FABRIC },
             { },
         },
@@ -3002,7 +3003,7 @@ static const TypeInfo types[] = {
         .instance_size = sizeof(PnvMachineState),
         .class_init    = pnv_machine_class_init,
         .class_size    = sizeof(PnvMachineClass),
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { TYPE_INTERRUPT_STATS_PROVIDER },
             { TYPE_NMI },
             { },
diff --git a/hw/ppc/pnv_adu.c b/hw/ppc/pnv_adu.c
index d09a167466..005fbda475 100644
--- a/hw/ppc/pnv_adu.c
+++ b/hw/ppc/pnv_adu.c
@@ -189,7 +189,7 @@ static const Property pnv_adu_properties[] = {
     DEFINE_PROP_LINK("lpc", PnvADU, lpc, TYPE_PNV_LPC, PnvLpcController *),
 };
 
-static void pnv_adu_class_init(ObjectClass *klass, void *data)
+static void pnv_adu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -204,7 +204,7 @@ static const TypeInfo pnv_adu_type_info = {
     .parent        = TYPE_DEVICE,
     .instance_size = sizeof(PnvADU),
     .class_init    = pnv_adu_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { } },
 };
diff --git a/hw/ppc/pnv_chiptod.c b/hw/ppc/pnv_chiptod.c
index c8987ae67a..b9e9c7ba3d 100644
--- a/hw/ppc/pnv_chiptod.c
+++ b/hw/ppc/pnv_chiptod.c
@@ -456,7 +456,7 @@ static const Property pnv_chiptod_properties[] = {
     DEFINE_PROP_LINK("chip", PnvChipTOD , chip, TYPE_PNV_CHIP, PnvChip *),
 };
 
-static void pnv_chiptod_power9_class_init(ObjectClass *klass, void *data)
+static void pnv_chiptod_power9_class_init(ObjectClass *klass, const void *data)
 {
     PnvChipTODClass *pctc = PNV_CHIPTOD_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -478,7 +478,7 @@ static const TypeInfo pnv_chiptod_power9_type_info = {
     .parent        = TYPE_PNV_CHIPTOD,
     .instance_size = sizeof(PnvChipTOD),
     .class_init    = pnv_chiptod_power9_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
@@ -492,7 +492,7 @@ static int pnv_chiptod_power10_dt_xscom(PnvXScomInterface *dev, void *fdt,
     return pnv_chiptod_dt_xscom(dev, fdt, xscom_offset, compat, sizeof(compat));
 }
 
-static void pnv_chiptod_power10_class_init(ObjectClass *klass, void *data)
+static void pnv_chiptod_power10_class_init(ObjectClass *klass, const void *data)
 {
     PnvChipTODClass *pctc = PNV_CHIPTOD_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -514,7 +514,7 @@ static const TypeInfo pnv_chiptod_power10_type_info = {
     .parent        = TYPE_PNV_CHIPTOD,
     .instance_size = sizeof(PnvChipTOD),
     .class_init    = pnv_chiptod_power10_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
@@ -555,7 +555,7 @@ static void pnv_chiptod_unrealize(DeviceState *dev)
     qemu_unregister_reset(pnv_chiptod_reset, chiptod);
 }
 
-static void pnv_chiptod_class_init(ObjectClass *klass, void *data)
+static void pnv_chiptod_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/pnv_core.c b/hw/ppc/pnv_core.c
index a33977da18..08c20224b9 100644
--- a/hw/ppc/pnv_core.c
+++ b/hw/ppc/pnv_core.c
@@ -449,7 +449,7 @@ static const Property pnv_core_properties[] = {
     DEFINE_PROP_LINK("chip", PnvCore, chip, TYPE_PNV_CHIP, PnvChip *),
 };
 
-static void pnv_core_power8_class_init(ObjectClass *oc, void *data)
+static void pnv_core_power8_class_init(ObjectClass *oc, const void *data)
 {
     PnvCoreClass *pcc = PNV_CORE_CLASS(oc);
 
@@ -457,7 +457,7 @@ static void pnv_core_power8_class_init(ObjectClass *oc, void *data)
     pcc->xscom_size = PNV_XSCOM_EX_SIZE;
 }
 
-static void pnv_core_power9_class_init(ObjectClass *oc, void *data)
+static void pnv_core_power9_class_init(ObjectClass *oc, const void *data)
 {
     PnvCoreClass *pcc = PNV_CORE_CLASS(oc);
 
@@ -465,7 +465,7 @@ static void pnv_core_power9_class_init(ObjectClass *oc, void *data)
     pcc->xscom_size = PNV_XSCOM_EX_SIZE;
 }
 
-static void pnv_core_power10_class_init(ObjectClass *oc, void *data)
+static void pnv_core_power10_class_init(ObjectClass *oc, const void *data)
 {
     PnvCoreClass *pcc = PNV_CORE_CLASS(oc);
 
@@ -473,7 +473,7 @@ static void pnv_core_power10_class_init(ObjectClass *oc, void *data)
     pcc->xscom_size = PNV10_XSCOM_EC_SIZE;
 }
 
-static void pnv_core_class_init(ObjectClass *oc, void *data)
+static void pnv_core_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -700,7 +700,7 @@ static const Property pnv_quad_properties[] = {
     DEFINE_PROP_UINT32("quad-id", PnvQuad, quad_id, 0),
 };
 
-static void pnv_quad_power9_class_init(ObjectClass *oc, void *data)
+static void pnv_quad_power9_class_init(ObjectClass *oc, const void *data)
 {
     PnvQuadClass *pqc = PNV_QUAD_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -711,7 +711,7 @@ static void pnv_quad_power9_class_init(ObjectClass *oc, void *data)
     pqc->xscom_size = PNV9_XSCOM_EQ_SIZE;
 }
 
-static void pnv_quad_power10_class_init(ObjectClass *oc, void *data)
+static void pnv_quad_power10_class_init(ObjectClass *oc, const void *data)
 {
     PnvQuadClass *pqc = PNV_QUAD_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -725,7 +725,7 @@ static void pnv_quad_power10_class_init(ObjectClass *oc, void *data)
     pqc->xscom_qme_size = PNV10_XSCOM_QME_SIZE;
 }
 
-static void pnv_quad_class_init(ObjectClass *oc, void *data)
+static void pnv_quad_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ppc/pnv_homer.c b/hw/ppc/pnv_homer.c
index 0521f9a428..2208ffe632 100644
--- a/hw/ppc/pnv_homer.c
+++ b/hw/ppc/pnv_homer.c
@@ -89,7 +89,7 @@ static hwaddr pnv_homer_power8_get_base(PnvChip *chip)
     return PNV_HOMER_BASE(chip);
 }
 
-static void pnv_homer_power8_class_init(ObjectClass *klass, void *data)
+static void pnv_homer_power8_class_init(ObjectClass *klass, const void *data)
 {
     PnvHomerClass *homer = PNV_HOMER_CLASS(klass);
 
@@ -156,7 +156,7 @@ static hwaddr pnv_homer_power9_get_base(PnvChip *chip)
     return PNV9_HOMER_BASE(chip);
 }
 
-static void pnv_homer_power9_class_init(ObjectClass *klass, void *data)
+static void pnv_homer_power9_class_init(ObjectClass *klass, const void *data)
 {
     PnvHomerClass *homer = PNV_HOMER_CLASS(klass);
 
@@ -223,7 +223,7 @@ static hwaddr pnv_homer_power10_get_base(PnvChip *chip)
     return PNV10_HOMER_BASE(chip);
 }
 
-static void pnv_homer_power10_class_init(ObjectClass *klass, void *data)
+static void pnv_homer_power10_class_init(ObjectClass *klass, const void *data)
 {
     PnvHomerClass *homer = PNV_HOMER_CLASS(klass);
 
@@ -266,7 +266,7 @@ static const Property pnv_homer_properties[] = {
     DEFINE_PROP_LINK("chip", PnvHomer, chip, TYPE_PNV_CHIP, PnvChip *),
 };
 
-static void pnv_homer_class_init(ObjectClass *klass, void *data)
+static void pnv_homer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/pnv_i2c.c b/hw/ppc/pnv_i2c.c
index 8d35f452a2..60de479491 100644
--- a/hw/ppc/pnv_i2c.c
+++ b/hw/ppc/pnv_i2c.c
@@ -549,7 +549,7 @@ static const Property pnv_i2c_properties[] = {
     DEFINE_PROP_UINT32("num-busses", PnvI2C, num_busses, 1),
 };
 
-static void pnv_i2c_class_init(ObjectClass *klass, void *data)
+static void pnv_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvXScomInterfaceClass *xscomc = PNV_XSCOM_INTERFACE_CLASS(klass);
@@ -569,7 +569,7 @@ static const TypeInfo pnv_i2c_info = {
     .parent        = TYPE_DEVICE,
     .instance_size = sizeof(PnvI2C),
     .class_init    = pnv_i2c_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
diff --git a/hw/ppc/pnv_lpc.c b/hw/ppc/pnv_lpc.c
index d812dc8268..f6beba0917 100644
--- a/hw/ppc/pnv_lpc.c
+++ b/hw/ppc/pnv_lpc.c
@@ -714,7 +714,7 @@ static void pnv_lpc_power8_realize(DeviceState *dev, Error **errp)
                           PNV_XSCOM_LPC_SIZE);
 }
 
-static void pnv_lpc_power8_class_init(ObjectClass *klass, void *data)
+static void pnv_lpc_power8_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
@@ -732,7 +732,7 @@ static const TypeInfo pnv_lpc_power8_info = {
     .name          = TYPE_PNV8_LPC,
     .parent        = TYPE_PNV_LPC,
     .class_init    = pnv_lpc_power8_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
@@ -760,7 +760,7 @@ static void pnv_lpc_power9_realize(DeviceState *dev, Error **errp)
     qdev_init_gpio_out_named(dev, lpc->psi_irq_serirq, "SERIRQ", 4);
 }
 
-static void pnv_lpc_power9_class_init(ObjectClass *klass, void *data)
+static void pnv_lpc_power9_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvLpcClass *plc = PNV_LPC_CLASS(klass);
@@ -777,7 +777,7 @@ static const TypeInfo pnv_lpc_power9_info = {
     .class_init    = pnv_lpc_power9_class_init,
 };
 
-static void pnv_lpc_power10_class_init(ObjectClass *klass, void *data)
+static void pnv_lpc_power10_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -843,7 +843,7 @@ static const Property pnv_lpc_properties[] = {
     DEFINE_PROP_BOOL("psi-serirq", PnvLpcController, psi_has_serirq, false),
 };
 
-static void pnv_lpc_class_init(ObjectClass *klass, void *data)
+static void pnv_lpc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/pnv_n1_chiplet.c b/hw/ppc/pnv_n1_chiplet.c
index 03ff9fbad0..053f6473f2 100644
--- a/hw/ppc/pnv_n1_chiplet.c
+++ b/hw/ppc/pnv_n1_chiplet.c
@@ -136,7 +136,7 @@ static void pnv_n1_chiplet_realize(DeviceState *dev, Error **errp)
                           PNV10_XSCOM_N1_PB_SCOM_ES_SIZE);
 }
 
-static void pnv_n1_chiplet_class_init(ObjectClass *klass, void *data)
+static void pnv_n1_chiplet_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -159,7 +159,7 @@ static const TypeInfo pnv_n1_chiplet_info = {
     .instance_init = pnv_n1_chiplet_instance_init,
     .instance_size = sizeof(PnvN1Chiplet),
     .class_init    = pnv_n1_chiplet_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
diff --git a/hw/ppc/pnv_nest_pervasive.c b/hw/ppc/pnv_nest_pervasive.c
index 780fa69dde..1b1b14fed9 100644
--- a/hw/ppc/pnv_nest_pervasive.c
+++ b/hw/ppc/pnv_nest_pervasive.c
@@ -181,7 +181,7 @@ static void pnv_nest_pervasive_realize(DeviceState *dev, Error **errp)
                           PNV10_XSCOM_CHIPLET_CTRL_REGS_SIZE);
 }
 
-static void pnv_nest_pervasive_class_init(ObjectClass *klass, void *data)
+static void pnv_nest_pervasive_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -194,7 +194,7 @@ static const TypeInfo pnv_nest_pervasive_info = {
     .parent        = TYPE_DEVICE,
     .instance_size = sizeof(PnvNestChipletPervasive),
     .class_init    = pnv_nest_pervasive_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
diff --git a/hw/ppc/pnv_occ.c b/hw/ppc/pnv_occ.c
index 0c9d3daec2..fa6f31cb8d 100644
--- a/hw/ppc/pnv_occ.c
+++ b/hw/ppc/pnv_occ.c
@@ -172,7 +172,7 @@ const MemoryRegionOps pnv_occ_sram_ops = {
     .endianness = DEVICE_BIG_ENDIAN,
 };
 
-static void pnv_occ_power8_class_init(ObjectClass *klass, void *data)
+static void pnv_occ_power8_class_init(ObjectClass *klass, const void *data)
 {
     PnvOCCClass *poc = PNV_OCC_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -246,7 +246,7 @@ static const MemoryRegionOps pnv_occ_power9_xscom_ops = {
     .endianness = DEVICE_BIG_ENDIAN,
 };
 
-static void pnv_occ_power9_class_init(ObjectClass *klass, void *data)
+static void pnv_occ_power9_class_init(ObjectClass *klass, const void *data)
 {
     PnvOCCClass *poc = PNV_OCC_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -266,7 +266,7 @@ static const TypeInfo pnv_occ_power9_type_info = {
     .class_init    = pnv_occ_power9_class_init,
 };
 
-static void pnv_occ_power10_class_init(ObjectClass *klass, void *data)
+static void pnv_occ_power10_class_init(ObjectClass *klass, const void *data)
 {
     PnvOCCClass *poc = PNV_OCC_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -335,7 +335,7 @@ static const Property pnv_occ_properties[] = {
     DEFINE_PROP_LINK("homer", PnvOCC, homer, TYPE_PNV_HOMER, PnvHomer *),
 };
 
-static void pnv_occ_class_init(ObjectClass *klass, void *data)
+static void pnv_occ_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/pnv_pnor.c b/hw/ppc/pnv_pnor.c
index 9db44ca21d..af7cfd028b 100644
--- a/hw/ppc/pnv_pnor.c
+++ b/hw/ppc/pnv_pnor.c
@@ -119,7 +119,7 @@ static const Property pnv_pnor_properties[] = {
     DEFINE_PROP_DRIVE("drive", PnvPnor, blk),
 };
 
-static void pnv_pnor_class_init(ObjectClass *klass, void *data)
+static void pnv_pnor_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/pnv_psi.c b/hw/ppc/pnv_psi.c
index f832ee61e8..5d947d8b52 100644
--- a/hw/ppc/pnv_psi.c
+++ b/hw/ppc/pnv_psi.c
@@ -557,7 +557,7 @@ static const Property pnv_psi_properties[] = {
     DEFINE_PROP_UINT64("fsp-bar", PnvPsi, fsp_bar, 0),
 };
 
-static void pnv_psi_power8_class_init(ObjectClass *klass, void *data)
+static void pnv_psi_power8_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
@@ -887,7 +887,7 @@ static void pnv_psi_power9_realize(DeviceState *dev, Error **errp)
     pnv_psi_realize(dev, errp);
 }
 
-static void pnv_psi_power9_class_init(ObjectClass *klass, void *data)
+static void pnv_psi_power9_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
@@ -913,13 +913,13 @@ static const TypeInfo pnv_psi_power9_info = {
     .instance_size = sizeof(Pnv9Psi),
     .instance_init = pnv_psi_power9_instance_init,
     .class_init    = pnv_psi_power9_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
             { TYPE_XIVE_NOTIFIER },
             { },
     },
 };
 
-static void pnv_psi_power10_class_init(ObjectClass *klass, void *data)
+static void pnv_psi_power10_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
@@ -939,7 +939,7 @@ static const TypeInfo pnv_psi_power10_info = {
     .class_init    = pnv_psi_power10_class_init,
 };
 
-static void pnv_psi_class_init(ObjectClass *klass, void *data)
+static void pnv_psi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
@@ -959,7 +959,7 @@ static const TypeInfo pnv_psi_info = {
     .class_init    = pnv_psi_class_init,
     .class_size    = sizeof(PnvPsiClass),
     .abstract      = true,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
diff --git a/hw/ppc/pnv_sbe.c b/hw/ppc/pnv_sbe.c
index 74cee4eea7..34dc013d47 100644
--- a/hw/ppc/pnv_sbe.c
+++ b/hw/ppc/pnv_sbe.c
@@ -331,7 +331,7 @@ static const MemoryRegionOps pnv_sbe_power9_xscom_mbox_ops = {
     .endianness = DEVICE_BIG_ENDIAN,
 };
 
-static void pnv_sbe_power9_class_init(ObjectClass *klass, void *data)
+static void pnv_sbe_power9_class_init(ObjectClass *klass, const void *data)
 {
     PnvSBEClass *psc = PNV_SBE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -350,7 +350,7 @@ static const TypeInfo pnv_sbe_power9_type_info = {
     .class_init    = pnv_sbe_power9_class_init,
 };
 
-static void pnv_sbe_power10_class_init(ObjectClass *klass, void *data)
+static void pnv_sbe_power10_class_init(ObjectClass *klass, const void *data)
 {
     PnvSBEClass *psc = PNV_SBE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -386,7 +386,7 @@ static void pnv_sbe_realize(DeviceState *dev, Error **errp)
     sbe->timer = timer_new_us(QEMU_CLOCK_VIRTUAL, sbe_timer, sbe);
 }
 
-static void pnv_sbe_class_init(ObjectClass *klass, void *data)
+static void pnv_sbe_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/ppc440_bamboo.c b/hw/ppc/ppc440_bamboo.c
index 099fda3909..6fff0d8afb 100644
--- a/hw/ppc/ppc440_bamboo.c
+++ b/hw/ppc/ppc440_bamboo.c
@@ -64,7 +64,7 @@ static int bamboo_load_device_tree(MachineState *machine,
     uint32_t tb_freq = 400000000;
     uint32_t clock_freq = 400000000;
 
-    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
+    filename = qemu_find_file(QEMU_FILE_TYPE_DTB, BINARY_DEVICE_TREE_FILE);
     if (!filename) {
         return -1;
     }
diff --git a/hw/ppc/ppc440_uc.c b/hw/ppc/ppc440_uc.c
index 9da30a1724..89e3fae08d 100644
--- a/hw/ppc/ppc440_uc.c
+++ b/hw/ppc/ppc440_uc.c
@@ -1027,7 +1027,7 @@ static const Property ppc460ex_pcie_props[] = {
                      PowerPCCPU *),
 };
 
-static void ppc460ex_pcie_class_init(ObjectClass *klass, void *data)
+static void ppc460ex_pcie_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/ppc4xx_devs.c b/hw/ppc/ppc4xx_devs.c
index 9ce9777510..f36c519c8b 100644
--- a/hw/ppc/ppc4xx_devs.c
+++ b/hw/ppc/ppc4xx_devs.c
@@ -236,7 +236,7 @@ static const Property ppc4xx_mal_properties[] = {
     DEFINE_PROP_UINT8("rxc-num", Ppc4xxMalState, rxcnum, 0),
 };
 
-static void ppc4xx_mal_class_init(ObjectClass *oc, void *data)
+static void ppc4xx_mal_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -326,7 +326,7 @@ static void ppc405_plb_realize(DeviceState *dev, Error **errp)
     ppc4xx_dcr_register(dcr, PLB4A1_ACR, plb, &dcr_read_plb, &dcr_write_plb);
 }
 
-static void ppc405_plb_class_init(ObjectClass *oc, void *data)
+static void ppc405_plb_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -512,7 +512,7 @@ static void ppc405_ebc_realize(DeviceState *dev, Error **errp)
     ppc4xx_dcr_register(dcr, EBC0_CFGDATA, ebc, &dcr_read_ebc, &dcr_write_ebc);
 }
 
-static void ppc405_ebc_class_init(ObjectClass *oc, void *data)
+static void ppc405_ebc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -543,7 +543,7 @@ static const Property ppc4xx_dcr_properties[] = {
                      PowerPCCPU *),
 };
 
-static void ppc4xx_dcr_class_init(ObjectClass *oc, void *data)
+static void ppc4xx_dcr_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ppc/ppc4xx_sdram.c b/hw/ppc/ppc4xx_sdram.c
index bf0faad9e7..592769826b 100644
--- a/hw/ppc/ppc4xx_sdram.c
+++ b/hw/ppc/ppc4xx_sdram.c
@@ -431,7 +431,7 @@ static const Property ppc4xx_sdram_ddr_props[] = {
     DEFINE_PROP_UINT32("nbanks", Ppc4xxSdramDdrState, nbanks, 4),
 };
 
-static void ppc4xx_sdram_ddr_class_init(ObjectClass *oc, void *data)
+static void ppc4xx_sdram_ddr_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -715,7 +715,7 @@ static const Property ppc4xx_sdram_ddr2_props[] = {
     DEFINE_PROP_UINT32("nbanks", Ppc4xxSdramDdr2State, nbanks, 4),
 };
 
-static void ppc4xx_sdram_ddr2_class_init(ObjectClass *oc, void *data)
+static void ppc4xx_sdram_ddr2_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ppc/ppce500_spin.c b/hw/ppc/ppce500_spin.c
index baab74c4ed..2310f62a91 100644
--- a/hw/ppc/ppce500_spin.c
+++ b/hw/ppc/ppce500_spin.c
@@ -175,7 +175,7 @@ static void ppce500_spin_initfn(Object *obj)
     sysbus_init_mmio(dev, &s->iomem);
 }
 
-static void ppce500_spin_class_init(ObjectClass *klass, void *data)
+static void ppce500_spin_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/prep_systemio.c b/hw/ppc/prep_systemio.c
index 08f29e72e4..41cd923b94 100644
--- a/hw/ppc/prep_systemio.c
+++ b/hw/ppc/prep_systemio.c
@@ -290,7 +290,7 @@ static const Property prep_systemio_properties[] = {
     DEFINE_PROP_UINT8("equipment", PrepSystemIoState, equipment, 0),
 };
 
-static void prep_systemio_class_initfn(ObjectClass *klass, void *data)
+static void prep_systemio_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/rs6000_mc.c b/hw/ppc/rs6000_mc.c
index 27f1c90f06..a0964051d1 100644
--- a/hw/ppc/rs6000_mc.c
+++ b/hw/ppc/rs6000_mc.c
@@ -212,7 +212,7 @@ static const Property rs6000mc_properties[] = {
     DEFINE_PROP_BOOL("auto-configure", RS6000MCState, autoconfigure, true),
 };
 
-static void rs6000mc_class_initfn(ObjectClass *klass, void *data)
+static void rs6000mc_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ppc/sam460ex.c b/hw/ppc/sam460ex.c
index a070de23cf..ee31bd8f34 100644
--- a/hw/ppc/sam460ex.c
+++ b/hw/ppc/sam460ex.c
@@ -142,7 +142,7 @@ static int sam460ex_load_device_tree(MachineState *machine,
     uint32_t clock_freq = CPU_FREQ;
     int offset;
 
-    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
+    filename = qemu_find_file(QEMU_FILE_TYPE_DTB, BINARY_DEVICE_TREE_FILE);
     if (!filename) {
         error_report("Couldn't find dtb file `%s'", BINARY_DEVICE_TREE_FILE);
         exit(1);
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index c1a7ac3536..702f774cda 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4595,7 +4595,7 @@ static void spapr_cpu_exec_exit(PPCVirtualHypervisor *vhyp, PowerPCCPU *cpu)
     }
 }
 
-static void spapr_machine_class_init(ObjectClass *oc, void *data)
+static void spapr_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     SpaprMachineClass *smc = SPAPR_MACHINE_CLASS(oc);
@@ -4717,7 +4717,7 @@ static const TypeInfo spapr_machine_info = {
     .instance_finalize = spapr_machine_finalizefn,
     .class_size    = sizeof(SpaprMachineClass),
     .class_init    = spapr_machine_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_FW_PATH_PROVIDER },
         { TYPE_NMI },
         { TYPE_HOTPLUG_HANDLER },
@@ -4739,7 +4739,7 @@ static void spapr_machine_latest_class_options(MachineClass *mc)
 #define DEFINE_SPAPR_MACHINE_IMPL(latest, ...)                       \
     static void MACHINE_VER_SYM(class_init, spapr, __VA_ARGS__)(     \
         ObjectClass *oc,                                             \
-        void *data)                                                  \
+        const void *data)                                            \
     {                                                                \
         MachineClass *mc = MACHINE_CLASS(oc);                        \
         MACHINE_VER_SYM(class_options, spapr, __VA_ARGS__)(mc);      \
diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index faf9170ba6..4952f9bd2c 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -373,7 +373,7 @@ static const Property spapr_cpu_core_properties[] = {
     DEFINE_PROP_INT32("node-id", SpaprCpuCore, node_id, CPU_UNSET_NUMA_NODE_ID),
 };
 
-static void spapr_cpu_core_class_init(ObjectClass *oc, void *data)
+static void spapr_cpu_core_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     SpaprCpuCoreClass *scc = SPAPR_CPU_CORE_CLASS(oc);
@@ -388,7 +388,7 @@ static void spapr_cpu_core_class_init(ObjectClass *oc, void *data)
 #define DEFINE_SPAPR_CPU_CORE_TYPE(cpu_model) \
     {                                                   \
         .parent = TYPE_SPAPR_CPU_CORE,                  \
-        .class_data = (void *) POWERPC_CPU_TYPE_NAME(cpu_model), \
+        .class_data = POWERPC_CPU_TYPE_NAME(cpu_model), \
         .class_init = spapr_cpu_core_class_init,        \
         .name = SPAPR_CPU_CORE_TYPE_NAME(cpu_model),    \
     }
diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c
index 549b652c20..d2044b4fb5 100644
--- a/hw/ppc/spapr_drc.c
+++ b/hw/ppc/spapr_drc.c
@@ -589,7 +589,7 @@ static void spapr_dr_connector_instance_init(Object *obj)
     drc->state = drck->empty_state;
 }
 
-static void spapr_dr_connector_class_init(ObjectClass *k, void *data)
+static void spapr_dr_connector_class_init(ObjectClass *k, const void *data)
 {
     DeviceClass *dk = DEVICE_CLASS(k);
 
@@ -665,7 +665,7 @@ static void unrealize_physical(DeviceState *d)
     qemu_unregister_reset(drc_physical_reset, drcp);
 }
 
-static void spapr_drc_physical_class_init(ObjectClass *k, void *data)
+static void spapr_drc_physical_class_init(ObjectClass *k, const void *data)
 {
     DeviceClass *dk = DEVICE_CLASS(k);
     SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
@@ -679,7 +679,7 @@ static void spapr_drc_physical_class_init(ObjectClass *k, void *data)
     drck->empty_state = SPAPR_DRC_STATE_PHYSICAL_POWERON;
 }
 
-static void spapr_drc_logical_class_init(ObjectClass *k, void *data)
+static void spapr_drc_logical_class_init(ObjectClass *k, const void *data)
 {
     SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
 
@@ -690,7 +690,7 @@ static void spapr_drc_logical_class_init(ObjectClass *k, void *data)
     drck->empty_state = SPAPR_DRC_STATE_LOGICAL_UNUSABLE;
 }
 
-static void spapr_drc_cpu_class_init(ObjectClass *k, void *data)
+static void spapr_drc_cpu_class_init(ObjectClass *k, const void *data)
 {
     SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
 
@@ -701,7 +701,7 @@ static void spapr_drc_cpu_class_init(ObjectClass *k, void *data)
     drck->dt_populate = spapr_core_dt_populate;
 }
 
-static void spapr_drc_pci_class_init(ObjectClass *k, void *data)
+static void spapr_drc_pci_class_init(ObjectClass *k, const void *data)
 {
     SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
 
@@ -712,7 +712,7 @@ static void spapr_drc_pci_class_init(ObjectClass *k, void *data)
     drck->dt_populate = spapr_pci_dt_populate;
 }
 
-static void spapr_drc_lmb_class_init(ObjectClass *k, void *data)
+static void spapr_drc_lmb_class_init(ObjectClass *k, const void *data)
 {
     SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
 
@@ -723,7 +723,7 @@ static void spapr_drc_lmb_class_init(ObjectClass *k, void *data)
     drck->dt_populate = spapr_lmb_dt_populate;
 }
 
-static void spapr_drc_phb_class_init(ObjectClass *k, void *data)
+static void spapr_drc_phb_class_init(ObjectClass *k, const void *data)
 {
     SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
 
@@ -734,7 +734,7 @@ static void spapr_drc_phb_class_init(ObjectClass *k, void *data)
     drck->dt_populate = spapr_phb_dt_populate;
 }
 
-static void spapr_drc_pmem_class_init(ObjectClass *k, void *data)
+static void spapr_drc_pmem_class_init(ObjectClass *k, const void *data)
 {
     SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
 
diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
index db3a14c1df..c2432a0c00 100644
--- a/hw/ppc/spapr_iommu.c
+++ b/hw/ppc/spapr_iommu.c
@@ -668,7 +668,7 @@ int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname,
                         tcet->liobn, 0, tcet->nb_table << tcet->page_shift);
 }
 
-static void spapr_tce_table_class_init(ObjectClass *klass, void *data)
+static void spapr_tce_table_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = spapr_tce_table_realize;
@@ -693,7 +693,8 @@ static const TypeInfo spapr_tce_table_info = {
     .class_init = spapr_tce_table_class_init,
 };
 
-static void spapr_iommu_memory_region_class_init(ObjectClass *klass, void *data)
+static void spapr_iommu_memory_region_class_init(ObjectClass *klass,
+                                                 const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/ppc/spapr_nvdimm.c b/hw/ppc/spapr_nvdimm.c
index 6e93ff9b33..72b4a6329f 100644
--- a/hw/ppc/spapr_nvdimm.c
+++ b/hw/ppc/spapr_nvdimm.c
@@ -888,7 +888,7 @@ static const Property spapr_nvdimm_properties[] = {
 };
 #endif
 
-static void spapr_nvdimm_class_init(ObjectClass *oc, void *data)
+static void spapr_nvdimm_class_init(ObjectClass *oc, const void *data)
 {
     NVDIMMClass *nvc = NVDIMM_CLASS(oc);
 
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 384269b831..1ac1185825 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -2173,7 +2173,7 @@ static const char *spapr_phb_root_bus_path(PCIHostState *host_bridge,
     return sphb->dtbusname;
 }
 
-static void spapr_phb_class_init(ObjectClass *klass, void *data)
+static void spapr_phb_class_init(ObjectClass *klass, const void *data)
 {
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -2200,7 +2200,7 @@ static const TypeInfo spapr_phb_info = {
     .instance_size = sizeof(SpaprPhbState),
     .instance_finalize = spapr_phb_finalizefn,
     .class_init    = spapr_phb_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
diff --git a/hw/ppc/spapr_rng.c b/hw/ppc/spapr_rng.c
index 95def5b1e5..6fec607037 100644
--- a/hw/ppc/spapr_rng.c
+++ b/hw/ppc/spapr_rng.c
@@ -136,7 +136,7 @@ static const Property spapr_rng_properties[] = {
                      RngBackend *),
 };
 
-static void spapr_rng_class_init(ObjectClass *oc, void *data)
+static void spapr_rng_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ppc/spapr_rtc.c b/hw/ppc/spapr_rtc.c
index 46fbc78900..1f7d2d8f89 100644
--- a/hw/ppc/spapr_rtc.c
+++ b/hw/ppc/spapr_rtc.c
@@ -163,7 +163,7 @@ static const VMStateDescription vmstate_spapr_rtc = {
     },
 };
 
-static void spapr_rtc_class_init(ObjectClass *oc, void *data)
+static void spapr_rtc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ppc/spapr_tpm_proxy.c b/hw/ppc/spapr_tpm_proxy.c
index ceaa0acaa1..862eeaa50a 100644
--- a/hw/ppc/spapr_tpm_proxy.c
+++ b/hw/ppc/spapr_tpm_proxy.c
@@ -149,7 +149,7 @@ static const Property spapr_tpm_proxy_properties[] = {
     DEFINE_PROP_STRING("host-path", SpaprTpmProxy, host_path),
 };
 
-static void spapr_tpm_proxy_class_init(ObjectClass *k, void *data)
+static void spapr_tpm_proxy_class_init(ObjectClass *k, const void *data)
 {
     DeviceClass *dk = DEVICE_CLASS(k);
 
diff --git a/hw/ppc/spapr_vio.c b/hw/ppc/spapr_vio.c
index 09243c183b..7759436a4f 100644
--- a/hw/ppc/spapr_vio.c
+++ b/hw/ppc/spapr_vio.c
@@ -50,7 +50,7 @@ static char *spapr_vio_get_dev_name(DeviceState *qdev)
     return g_strdup_printf("%s@%x", pc->dt_name, dev->reg);
 }
 
-static void spapr_vio_bus_class_init(ObjectClass *klass, void *data)
+static void spapr_vio_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
@@ -599,7 +599,7 @@ SpaprVioBus *spapr_vio_bus_init(void)
     return bus;
 }
 
-static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data)
+static void spapr_vio_bridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -631,7 +631,7 @@ const VMStateDescription vmstate_spapr_vio = {
     },
 };
 
-static void vio_spapr_device_class_init(ObjectClass *klass, void *data)
+static void vio_spapr_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->realize = spapr_vio_busdev_realize;
diff --git a/hw/ppc/virtex_ml507.c b/hw/ppc/virtex_ml507.c
index 17115be74d..c9969ae48a 100644
--- a/hw/ppc/virtex_ml507.c
+++ b/hw/ppc/virtex_ml507.c
@@ -146,7 +146,7 @@ static int xilinx_load_device_tree(MachineState *machine,
         /* Try the local "ppc.dtb" override.  */
         fdt = load_device_tree("ppc.dtb", &fdt_size);
         if (!fdt) {
-            path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
+            path = qemu_find_file(QEMU_FILE_TYPE_DTB, BINARY_DEVICE_TREE_FILE);
             if (path) {
                 fdt = load_device_tree(path, &fdt_size);
                 g_free(path);
diff --git a/hw/remote/machine.c b/hw/remote/machine.c
index d4616025e8..e4b47838ba 100644
--- a/hw/remote/machine.c
+++ b/hw/remote/machine.c
@@ -121,7 +121,7 @@ static void remote_machine_dev_unplug_cb(HotplugHandler *hotplug_dev,
     }
 }
 
-static void remote_machine_class_init(ObjectClass *oc, void *data)
+static void remote_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
@@ -146,7 +146,7 @@ static const TypeInfo remote_machine = {
     .instance_size = sizeof(RemoteMachineState),
     .instance_init = remote_machine_instance_init,
     .class_init = remote_machine_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
diff --git a/hw/remote/proxy.c b/hw/remote/proxy.c
index 96d831a579..b0165aa2a1 100644
--- a/hw/remote/proxy.c
+++ b/hw/remote/proxy.c
@@ -195,7 +195,7 @@ static const Property proxy_properties[] = {
     DEFINE_PROP_STRING("fd", PCIProxyDev, fd),
 };
 
-static void pci_proxy_dev_class_init(ObjectClass *klass, void *data)
+static void pci_proxy_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -215,7 +215,7 @@ static const TypeInfo pci_proxy_dev_type_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIProxyDev),
     .class_init    = pci_proxy_dev_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/remote/remote-obj.c b/hw/remote/remote-obj.c
index 2f25f92dcd..85882902d7 100644
--- a/hw/remote/remote-obj.c
+++ b/hw/remote/remote-obj.c
@@ -163,7 +163,7 @@ static void remote_object_finalize(Object *obj)
     g_free(o->devid);
 }
 
-static void remote_object_class_init(ObjectClass *klass, void *data)
+static void remote_object_class_init(ObjectClass *klass, const void *data)
 {
     RemoteObjectClass *k = REMOTE_OBJECT_CLASS(klass);
 
@@ -188,7 +188,7 @@ static const TypeInfo remote_object_info = {
     .instance_finalize = remote_object_finalize,
     .class_size = sizeof(RemoteObjectClass),
     .class_init = remote_object_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c
index 9bdd0a465b..ea6165ebdc 100644
--- a/hw/remote/vfio-user-obj.c
+++ b/hw/remote/vfio-user-obj.c
@@ -917,7 +917,7 @@ static void vfu_object_finalize(Object *obj)
     }
 }
 
-static void vfu_object_class_init(ObjectClass *klass, void *data)
+static void vfu_object_class_init(ObjectClass *klass, const void *data)
 {
     VfuObjectClass *k = VFU_OBJECT_CLASS(klass);
 
@@ -944,7 +944,7 @@ static const TypeInfo vfu_object_info = {
     .instance_finalize = vfu_object_finalize,
     .class_size = sizeof(VfuObjectClass),
     .class_init = vfu_object_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
index 9c846f9b5b..e39ee657cd 100644
--- a/hw/riscv/microchip_pfsoc.c
+++ b/hw/riscv/microchip_pfsoc.c
@@ -479,7 +479,7 @@ static void microchip_pfsoc_soc_realize(DeviceState *dev, Error **errp)
                                 qspi_xip_mem);
 }
 
-static void microchip_pfsoc_soc_class_init(ObjectClass *oc, void *data)
+static void microchip_pfsoc_soc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -639,7 +639,8 @@ static void microchip_icicle_kit_machine_init(MachineState *machine)
     }
 }
 
-static void microchip_icicle_kit_machine_class_init(ObjectClass *oc, void *data)
+static void microchip_icicle_kit_machine_class_init(ObjectClass *oc,
+                                                    const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/riscv/opentitan.c b/hw/riscv/opentitan.c
index 019d6b3986..d369a8a7dc 100644
--- a/hw/riscv/opentitan.c
+++ b/hw/riscv/opentitan.c
@@ -112,7 +112,7 @@ static void opentitan_machine_init(MachineState *machine)
     }
 }
 
-static void opentitan_machine_class_init(ObjectClass *oc, void *data)
+static void opentitan_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -313,7 +313,7 @@ static const Property lowrisc_ibex_soc_props[] = {
     DEFINE_PROP_UINT32("resetvec", LowRISCIbexSoCState, resetvec, 0x20000400),
 };
 
-static void lowrisc_ibex_soc_class_init(ObjectClass *oc, void *data)
+static void lowrisc_ibex_soc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/riscv/riscv-iommu-pci.c b/hw/riscv/riscv-iommu-pci.c
index a795464803..1f44eef74e 100644
--- a/hw/riscv/riscv-iommu-pci.c
+++ b/hw/riscv/riscv-iommu-pci.c
@@ -184,7 +184,7 @@ static void riscv_iommu_pci_reset_hold(Object *obj, ResetType type)
     trace_riscv_iommu_pci_reset_hold(type);
 }
 
-static void riscv_iommu_pci_class_init(ObjectClass *klass, void *data)
+static void riscv_iommu_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -209,7 +209,7 @@ static const TypeInfo riscv_iommu_pci = {
     .class_init = riscv_iommu_pci_class_init,
     .instance_init = riscv_iommu_pci_init,
     .instance_size = sizeof(RISCVIOMMUStatePci),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { },
     },
diff --git a/hw/riscv/riscv-iommu-sys.c b/hw/riscv/riscv-iommu-sys.c
index 65b24fb07d..be2e3944dc 100644
--- a/hw/riscv/riscv-iommu-sys.c
+++ b/hw/riscv/riscv-iommu-sys.c
@@ -227,7 +227,7 @@ static void riscv_iommu_sys_reset_hold(Object *obj, ResetType type)
     trace_riscv_iommu_sys_reset_hold(type);
 }
 
-static void riscv_iommu_sys_class_init(ObjectClass *klass, void *data)
+static void riscv_iommu_sys_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/riscv/riscv-iommu.c b/hw/riscv/riscv-iommu.c
index 65411b3e4c..a877e5da84 100644
--- a/hw/riscv/riscv-iommu.c
+++ b/hw/riscv/riscv-iommu.c
@@ -2513,7 +2513,7 @@ static const Property riscv_iommu_properties[] = {
                       RISCV_IOMMU_IOCOUNT_NUM),
 };
 
-static void riscv_iommu_class_init(ObjectClass *klass, void* data)
+static void riscv_iommu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -2654,7 +2654,7 @@ static int riscv_iommu_memory_region_index_len(IOMMUMemoryRegion *iommu_mr)
     return 1 << as->iommu->pid_bits;
 }
 
-static void riscv_iommu_memory_region_init(ObjectClass *klass, void *data)
+static void riscv_iommu_memory_region_init(ObjectClass *klass, const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/riscv/riscv_hart.c b/hw/riscv/riscv_hart.c
index a55d156668..ac6539bd3e 100644
--- a/hw/riscv/riscv_hart.c
+++ b/hw/riscv/riscv_hart.c
@@ -160,7 +160,7 @@ static void riscv_harts_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void riscv_harts_class_init(ObjectClass *klass, void *data)
+static void riscv_harts_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/riscv/shakti_c.c b/hw/riscv/shakti_c.c
index 17c5c72102..3e7f441172 100644
--- a/hw/riscv/shakti_c.c
+++ b/hw/riscv/shakti_c.c
@@ -71,7 +71,7 @@ static void shakti_c_machine_instance_init(Object *obj)
 {
 }
 
-static void shakti_c_machine_class_init(ObjectClass *klass, void *data)
+static void shakti_c_machine_class_init(ObjectClass *klass, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(klass);
     static const char * const valid_cpu_types[] = {
@@ -142,7 +142,7 @@ static void shakti_c_soc_state_realize(DeviceState *dev, Error **errp)
         shakti_c_memmap[SHAKTI_C_ROM].base, &sss->rom);
 }
 
-static void shakti_c_soc_class_init(ObjectClass *klass, void *data)
+static void shakti_c_soc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = shakti_c_soc_state_realize;
diff --git a/hw/riscv/sifive_e.c b/hw/riscv/sifive_e.c
index 73d3b74281..7baed1958e 100644
--- a/hw/riscv/sifive_e.c
+++ b/hw/riscv/sifive_e.c
@@ -143,7 +143,7 @@ static void sifive_e_machine_instance_init(Object *obj)
     s->revb = false;
 }
 
-static void sifive_e_machine_class_init(ObjectClass *oc, void *data)
+static void sifive_e_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -284,7 +284,7 @@ static void sifive_e_soc_realize(DeviceState *dev, Error **errp)
         &s->xip_mem);
 }
 
-static void sifive_e_soc_class_init(ObjectClass *oc, void *data)
+static void sifive_e_soc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index 679f2024bc..d69f942cfb 100644
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -713,7 +713,7 @@ static void sifive_u_machine_instance_init(Object *obj)
     object_property_set_description(obj, "serial", "Board serial number");
 }
 
-static void sifive_u_machine_class_init(ObjectClass *oc, void *data)
+static void sifive_u_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -946,7 +946,7 @@ static const Property sifive_u_soc_props[] = {
     DEFINE_PROP_STRING("cpu-type", SiFiveUSoCState, cpu_type),
 };
 
-static void sifive_u_soc_class_init(ObjectClass *oc, void *data)
+static void sifive_u_soc_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/riscv/spike.c b/hw/riscv/spike.c
index 74a20016f1..641aae8c01 100644
--- a/hw/riscv/spike.c
+++ b/hw/riscv/spike.c
@@ -342,7 +342,7 @@ static void spike_machine_instance_init(Object *obj)
 {
 }
 
-static void spike_machine_class_init(ObjectClass *oc, void *data)
+static void spike_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 85849e604c..be1bf0f646 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -1906,7 +1906,7 @@ static void virt_machine_device_plug_cb(HotplugHandler *hotplug_dev,
     }
 }
 
-static void virt_machine_class_init(ObjectClass *oc, void *data)
+static void virt_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
@@ -1980,7 +1980,7 @@ static const TypeInfo virt_machine_typeinfo = {
     .class_init = virt_machine_class_init,
     .instance_init = virt_machine_instance_init,
     .instance_size = sizeof(RISCVVirtState),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
          { TYPE_HOTPLUG_HANDLER },
          { }
     },
diff --git a/hw/rtc/allwinner-rtc.c b/hw/rtc/allwinner-rtc.c
index fd8355a867..a747bff534 100644
--- a/hw/rtc/allwinner-rtc.c
+++ b/hw/rtc/allwinner-rtc.c
@@ -315,7 +315,7 @@ static const Property allwinner_rtc_properties[] = {
     DEFINE_PROP_INT32("base-year", AwRtcState, base_year, 0),
 };
 
-static void allwinner_rtc_class_init(ObjectClass *klass, void *data)
+static void allwinner_rtc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -330,7 +330,7 @@ static void allwinner_rtc_sun4i_init(Object *obj)
     s->base_year = 2010;
 }
 
-static void allwinner_rtc_sun4i_class_init(ObjectClass *klass, void *data)
+static void allwinner_rtc_sun4i_class_init(ObjectClass *klass, const void *data)
 {
     AwRtcClass *arc = AW_RTC_CLASS(klass);
 
@@ -346,7 +346,7 @@ static void allwinner_rtc_sun6i_init(Object *obj)
     s->base_year = 1970;
 }
 
-static void allwinner_rtc_sun6i_class_init(ObjectClass *klass, void *data)
+static void allwinner_rtc_sun6i_class_init(ObjectClass *klass, const void *data)
 {
     AwRtcClass *arc = AW_RTC_CLASS(klass);
 
@@ -362,7 +362,7 @@ static void allwinner_rtc_sun7i_init(Object *obj)
     s->base_year = 1970;
 }
 
-static void allwinner_rtc_sun7i_class_init(ObjectClass *klass, void *data)
+static void allwinner_rtc_sun7i_class_init(ObjectClass *klass, const void *data)
 {
     AwRtcClass *arc = AW_RTC_CLASS(klass);
     allwinner_rtc_sun4i_class_init(klass, arc);
diff --git a/hw/rtc/aspeed_rtc.c b/hw/rtc/aspeed_rtc.c
index fbdeb0781f..c4feea23a0 100644
--- a/hw/rtc/aspeed_rtc.c
+++ b/hw/rtc/aspeed_rtc.c
@@ -156,7 +156,7 @@ static void aspeed_rtc_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void aspeed_rtc_class_init(ObjectClass *klass, void *data)
+static void aspeed_rtc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/rtc/ds1338.c b/hw/rtc/ds1338.c
index 8dd17fdc07..5f1ee2e410 100644
--- a/hw/rtc/ds1338.c
+++ b/hw/rtc/ds1338.c
@@ -220,7 +220,7 @@ static void ds1338_reset(DeviceState *dev)
     s->addr_byte = false;
 }
 
-static void ds1338_class_init(ObjectClass *klass, void *data)
+static void ds1338_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
diff --git a/hw/rtc/exynos4210_rtc.c b/hw/rtc/exynos4210_rtc.c
index aa1b3cd115..624b4f61a8 100644
--- a/hw/rtc/exynos4210_rtc.c
+++ b/hw/rtc/exynos4210_rtc.c
@@ -592,7 +592,7 @@ static void exynos4210_rtc_finalize(Object *obj)
     ptimer_free(s->ptimer_1Hz);
 }
 
-static void exynos4210_rtc_class_init(ObjectClass *klass, void *data)
+static void exynos4210_rtc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/rtc/goldfish_rtc.c b/hw/rtc/goldfish_rtc.c
index d83cc26481..78df031cf2 100644
--- a/hw/rtc/goldfish_rtc.c
+++ b/hw/rtc/goldfish_rtc.c
@@ -273,7 +273,7 @@ static const Property goldfish_rtc_properties[] = {
                       false),
 };
 
-static void goldfish_rtc_class_init(ObjectClass *klass, void *data)
+static void goldfish_rtc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/rtc/ls7a_rtc.c b/hw/rtc/ls7a_rtc.c
index fce23a3dbe..10097b2db7 100644
--- a/hw/rtc/ls7a_rtc.c
+++ b/hw/rtc/ls7a_rtc.c
@@ -464,7 +464,7 @@ static const VMStateDescription vmstate_ls7a_rtc = {
     }
 };
 
-static void ls7a_rtc_class_init(ObjectClass *klass, void *data)
+static void ls7a_rtc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->vmsd = &vmstate_ls7a_rtc;
diff --git a/hw/rtc/m41t80.c b/hw/rtc/m41t80.c
index 9600695679..c631ec3ea1 100644
--- a/hw/rtc/m41t80.c
+++ b/hw/rtc/m41t80.c
@@ -94,7 +94,7 @@ static int m41t80_event(I2CSlave *i2c, enum i2c_event event)
     return 0;
 }
 
-static void m41t80_class_init(ObjectClass *klass, void *data)
+static void m41t80_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
diff --git a/hw/rtc/m48t59-isa.c b/hw/rtc/m48t59-isa.c
index 9c3855a3ef..9e2f6563a0 100644
--- a/hw/rtc/m48t59-isa.c
+++ b/hw/rtc/m48t59-isa.c
@@ -113,7 +113,7 @@ static void m48t59_isa_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void m48txx_isa_class_init(ObjectClass *klass, void *data)
+static void m48txx_isa_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     NvramClass *nc = NVRAM_CLASS(klass);
@@ -126,7 +126,7 @@ static void m48txx_isa_class_init(ObjectClass *klass, void *data)
     nc->toggle_lock = m48txx_isa_toggle_lock;
 }
 
-static void m48txx_isa_concrete_class_init(ObjectClass *klass, void *data)
+static void m48txx_isa_concrete_class_init(ObjectClass *klass, const void *data)
 {
     M48txxISADeviceClass *u = M48TXX_ISA_CLASS(klass);
     const M48txxInfo *info = data;
@@ -140,7 +140,7 @@ static const TypeInfo m48txx_isa_type_info = {
     .instance_size = sizeof(M48txxISAState),
     .abstract = true,
     .class_init = m48txx_isa_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_NVRAM },
         { }
     }
diff --git a/hw/rtc/m48t59.c b/hw/rtc/m48t59.c
index 3fb2f27d9d..68be2dad6f 100644
--- a/hw/rtc/m48t59.c
+++ b/hw/rtc/m48t59.c
@@ -622,7 +622,7 @@ static const Property m48t59_sysbus_properties[] = {
     DEFINE_PROP_INT32("base-year", M48txxSysBusState, state.base_year, 0),
 };
 
-static void m48txx_sysbus_class_init(ObjectClass *klass, void *data)
+static void m48txx_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     NvramClass *nc = NVRAM_CLASS(klass);
@@ -636,7 +636,8 @@ static void m48txx_sysbus_class_init(ObjectClass *klass, void *data)
     nc->toggle_lock = m48txx_sysbus_toggle_lock;
 }
 
-static void m48txx_sysbus_concrete_class_init(ObjectClass *klass, void *data)
+static void m48txx_sysbus_concrete_class_init(ObjectClass *klass,
+                                              const void *data)
 {
     M48txxSysBusDeviceClass *u = M48TXX_SYS_BUS_CLASS(klass);
     const M48txxInfo *info = data;
@@ -657,7 +658,7 @@ static const TypeInfo m48txx_sysbus_type_info = {
     .instance_init = m48t59_init1,
     .abstract = true,
     .class_init = m48txx_sysbus_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_NVRAM },
         { }
     }
diff --git a/hw/rtc/mc146818rtc.c b/hw/rtc/mc146818rtc.c
index e322fc2ffb..6f787be7af 100644
--- a/hw/rtc/mc146818rtc.c
+++ b/hw/rtc/mc146818rtc.c
@@ -1018,7 +1018,7 @@ static void rtc_build_aml(AcpiDevAmlIf *adev, Aml *scope)
     aml_append(scope, dev);
 }
 
-static void rtc_class_initfn(ObjectClass *klass, void *data)
+static void rtc_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -1038,7 +1038,7 @@ static const TypeInfo mc146818rtc_info = {
     .parent        = TYPE_ISA_DEVICE,
     .instance_size = sizeof(MC146818RtcState),
     .class_init    = rtc_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
diff --git a/hw/rtc/pl031.c b/hw/rtc/pl031.c
index ed439bd3ad..e545b9dfd6 100644
--- a/hw/rtc/pl031.c
+++ b/hw/rtc/pl031.c
@@ -332,7 +332,7 @@ static const Property pl031_properties[] = {
                      PL031State, migrate_tick_offset, true),
 };
 
-static void pl031_class_init(ObjectClass *klass, void *data)
+static void pl031_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/rtc/rs5c372.c b/hw/rtc/rs5c372.c
index 5542f74085..bb924534a7 100644
--- a/hw/rtc/rs5c372.c
+++ b/hw/rtc/rs5c372.c
@@ -210,7 +210,7 @@ static void rs5c372_init(Object *obj)
     qdev_prop_set_uint8(DEVICE(obj), "address", 0x32);
 }
 
-static void rs5c372_class_init(ObjectClass *klass, void *data)
+static void rs5c372_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
diff --git a/hw/rtc/sun4v-rtc.c b/hw/rtc/sun4v-rtc.c
index ffcc0aa25d..29e24ef6be 100644
--- a/hw/rtc/sun4v-rtc.c
+++ b/hw/rtc/sun4v-rtc.c
@@ -75,7 +75,7 @@ static void sun4v_rtc_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void sun4v_rtc_class_init(ObjectClass *klass, void *data)
+static void sun4v_rtc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/rtc/xlnx-zynqmp-rtc.c b/hw/rtc/xlnx-zynqmp-rtc.c
index b596b608c5..500982a801 100644
--- a/hw/rtc/xlnx-zynqmp-rtc.c
+++ b/hw/rtc/xlnx-zynqmp-rtc.c
@@ -251,7 +251,7 @@ static const VMStateDescription vmstate_rtc = {
     }
 };
 
-static void rtc_class_init(ObjectClass *klass, void *data)
+static void rtc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c
index 4afd77efd5..5b9004e9e1 100644
--- a/hw/rx/rx-gdbsim.c
+++ b/hw/rx/rx-gdbsim.c
@@ -155,7 +155,7 @@ static void rx_gdbsim_init(MachineState *machine)
     }
 }
 
-static void rx_gdbsim_class_init(ObjectClass *oc, void *data)
+static void rx_gdbsim_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -165,7 +165,7 @@ static void rx_gdbsim_class_init(ObjectClass *oc, void *data)
     mc->default_ram_id = "ext-sdram";
 }
 
-static void rx62n7_class_init(ObjectClass *oc, void *data)
+static void rx62n7_class_init(ObjectClass *oc, const void *data)
 {
     RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
@@ -175,7 +175,7 @@ static void rx62n7_class_init(ObjectClass *oc, void *data)
     mc->desc = "gdb simulator (R5F562N7 MCU and external RAM)";
 };
 
-static void rx62n8_class_init(ObjectClass *oc, void *data)
+static void rx62n8_class_init(ObjectClass *oc, const void *data)
 {
     RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
diff --git a/hw/rx/rx62n.c b/hw/rx/rx62n.c
index e6bac4f053..a2a243afa4 100644
--- a/hw/rx/rx62n.c
+++ b/hw/rx/rx62n.c
@@ -264,7 +264,7 @@ static const Property rx62n_properties[] = {
     DEFINE_PROP_UINT32("xtal-frequency-hz", RX62NState, xtal_freq_hz, 0),
 };
 
-static void rx62n_class_init(ObjectClass *klass, void *data)
+static void rx62n_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -272,7 +272,7 @@ static void rx62n_class_init(ObjectClass *klass, void *data)
     device_class_set_props(dc, rx62n_properties);
 }
 
-static void r5f562n7_class_init(ObjectClass *oc, void *data)
+static void r5f562n7_class_init(ObjectClass *oc, const void *data)
 {
     RX62NClass *rxc = RX62N_MCU_CLASS(oc);
 
@@ -281,7 +281,7 @@ static void r5f562n7_class_init(ObjectClass *oc, void *data)
     rxc->data_flash_size = 32 * KiB;
 };
 
-static void r5f562n8_class_init(ObjectClass *oc, void *data)
+static void r5f562n8_class_init(ObjectClass *oc, const void *data)
 {
     RX62NClass *rxc = RX62N_MCU_CLASS(oc);
 
diff --git a/hw/s390x/3270-ccw.c b/hw/s390x/3270-ccw.c
index 3a8930dfd1..3f0d384fd8 100644
--- a/hw/s390x/3270-ccw.c
+++ b/hw/s390x/3270-ccw.c
@@ -150,7 +150,7 @@ out_err:
     g_free(sch);
 }
 
-static void emulated_ccw_3270_class_init(ObjectClass *klass, void *data)
+static void emulated_ccw_3270_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/s390x/ap-bridge.c b/hw/s390x/ap-bridge.c
index ef8fa2b15b..edeb3dbef3 100644
--- a/hw/s390x/ap-bridge.c
+++ b/hw/s390x/ap-bridge.c
@@ -22,7 +22,7 @@ static char *ap_bus_get_dev_path(DeviceState *dev)
     return g_strdup_printf("/1");
 }
 
-static void ap_bus_class_init(ObjectClass *oc, void *data)
+static void ap_bus_class_init(ObjectClass *oc, const void *data)
 {
     BusClass *k = BUS_CLASS(oc);
 
@@ -61,7 +61,7 @@ void s390_init_ap(void)
     qbus_set_hotplug_handler(bus, OBJECT(dev));
  }
 
-static void ap_bridge_class_init(ObjectClass *oc, void *data)
+static void ap_bridge_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
@@ -75,7 +75,7 @@ static const TypeInfo ap_bridge_info = {
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = 0,
     .class_init    = ap_bridge_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
diff --git a/hw/s390x/ap-device.c b/hw/s390x/ap-device.c
index 237d1f19c5..733104403e 100644
--- a/hw/s390x/ap-device.c
+++ b/hw/s390x/ap-device.c
@@ -12,7 +12,7 @@
 #include "qapi/error.h"
 #include "hw/s390x/ap-device.h"
 
-static void ap_class_init(ObjectClass *klass, void *data)
+static void ap_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/s390x/ccw-device.c b/hw/s390x/ccw-device.c
index 1ea9934f6c..19c2238f76 100644
--- a/hw/s390x/ccw-device.c
+++ b/hw/s390x/ccw-device.c
@@ -94,7 +94,7 @@ static void ccw_device_reset_hold(Object *obj, ResetType type)
     css_reset_sch(ccw_dev->sch);
 }
 
-static void ccw_device_class_init(ObjectClass *klass, void *data)
+static void ccw_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     CCWDeviceClass *k = CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/css-bridge.c b/hw/s390x/css-bridge.c
index c48d5571b5..0f87b8c5c4 100644
--- a/hw/s390x/css-bridge.c
+++ b/hw/s390x/css-bridge.c
@@ -70,7 +70,7 @@ static char *virtual_css_bus_get_dev_path(DeviceState *dev)
     return g_strdup_printf("/%02x.%1x.%04x", sch->cssid, sch->ssid, sch->devno);
 }
 
-static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
+static void virtual_css_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -117,7 +117,7 @@ static bool prop_get_true(Object *obj, Error **errp)
     return true;
 }
 
-static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
+static void virtual_css_bridge_class_init(ObjectClass *klass, const void *data)
 {
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -136,7 +136,7 @@ static const TypeInfo virtual_css_bridge_info = {
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(VirtualCssBridge),
     .class_init    = virtual_css_bridge_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
diff --git a/hw/s390x/event-facility.c b/hw/s390x/event-facility.c
index 2b0332c20e..1afe364573 100644
--- a/hw/s390x/event-facility.c
+++ b/hw/s390x/event-facility.c
@@ -460,7 +460,7 @@ static void reset_event_facility(DeviceState *dev)
     sdev->receive_mask = 0;
 }
 
-static void init_event_facility_class(ObjectClass *klass, void *data)
+static void init_event_facility_class(ObjectClass *klass, const void *data)
 {
     SysBusDeviceClass *sbdc = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(sbdc);
@@ -497,7 +497,7 @@ static void event_realize(DeviceState *qdev, Error **errp)
     }
 }
 
-static void event_class_init(ObjectClass *klass, void *data)
+static void event_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index ce6f6078d7..716a6b7869 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -736,7 +736,7 @@ static void s390_ipl_reset(DeviceState *dev)
     }
 }
 
-static void s390_ipl_class_init(ObjectClass *klass, void *data)
+static void s390_ipl_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c
index 909475f048..10c81a4c89 100644
--- a/hw/s390x/s390-ccw.c
+++ b/hw/s390x/s390-ccw.c
@@ -175,7 +175,7 @@ static void s390_ccw_instance_init(Object *obj)
                                   "/disk@0,0", DEVICE(obj));
 }
 
-static void s390_ccw_class_init(ObjectClass *klass, void *data)
+static void s390_ccw_class_init(ObjectClass *klass, const void *data)
 {
     S390CCWDeviceClass *cdc = S390_CCW_DEVICE_CLASS(klass);
 
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 501330bfa7..e6aa44531f 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -1373,7 +1373,7 @@ static void s390_pcihost_reset(DeviceState *dev)
     pci_for_each_device_under_bus(bus, s390_pci_enumerate_bridge, s);
 }
 
-static void s390_pcihost_class_init(ObjectClass *klass, void *data)
+static void s390_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
@@ -1393,7 +1393,7 @@ static const TypeInfo s390_pcihost_info = {
     .parent        = TYPE_PCI_HOST_BRIDGE,
     .instance_size = sizeof(S390pciState),
     .class_init    = s390_pcihost_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
@@ -1557,7 +1557,7 @@ static const VMStateDescription s390_pci_device_vmstate = {
     .unmigratable = 1,
 };
 
-static void s390_pci_device_class_init(ObjectClass *klass, void *data)
+static void s390_pci_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1583,7 +1583,8 @@ static const TypeInfo s390_pci_iommu_info = {
     .instance_size = sizeof(S390PCIIOMMU),
 };
 
-static void s390_iommu_memory_region_class_init(ObjectClass *klass, void *data)
+static void s390_iommu_memory_region_class_init(ObjectClass *klass,
+                                                const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/s390x/s390-skeys-kvm.c b/hw/s390x/s390-skeys-kvm.c
index 0215e94388..f3056d6d25 100644
--- a/hw/s390x/s390-skeys-kvm.c
+++ b/hw/s390x/s390-skeys-kvm.c
@@ -52,7 +52,7 @@ static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn,
     return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args);
 }
 
-static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data)
+static void kvm_s390_skeys_class_init(ObjectClass *oc, const void *data)
 {
     S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
diff --git a/hw/s390x/s390-skeys.c b/hw/s390x/s390-skeys.c
index d437fe070d..aedb62b2d3 100644
--- a/hw/s390x/s390-skeys.c
+++ b/hw/s390x/s390-skeys.c
@@ -304,7 +304,7 @@ static int qemu_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn,
     return 0;
 }
 
-static void qemu_s390_skeys_class_init(ObjectClass *oc, void *data)
+static void qemu_s390_skeys_class_init(ObjectClass *oc, const void *data)
 {
     S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -466,7 +466,7 @@ static void s390_skeys_realize(DeviceState *dev, Error **errp)
     register_savevm_live(TYPE_S390_SKEYS, 0, 1, &savevm_s390_storage_keys, ss);
 }
 
-static void s390_skeys_class_init(ObjectClass *oc, void *data)
+static void s390_skeys_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/s390x/s390-stattrib-kvm.c b/hw/s390x/s390-stattrib-kvm.c
index ebcd56368f..e1fee361dc 100644
--- a/hw/s390x/s390-stattrib-kvm.c
+++ b/hw/s390x/s390-stattrib-kvm.c
@@ -188,7 +188,7 @@ static int kvm_s390_stattrib_get_active(S390StAttribState *sa)
     return kvm_s390_cmma_active();
 }
 
-static void kvm_s390_stattrib_class_init(ObjectClass *oc, void *data)
+static void kvm_s390_stattrib_class_init(ObjectClass *oc, const void *data)
 {
     S390StAttribClass *sac = S390_STATTRIB_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
diff --git a/hw/s390x/s390-stattrib.c b/hw/s390x/s390-stattrib.c
index a86002be6a..f74cf32636 100644
--- a/hw/s390x/s390-stattrib.c
+++ b/hw/s390x/s390-stattrib.c
@@ -307,7 +307,7 @@ static int qemu_s390_get_active(S390StAttribState *sa)
     return true;
 }
 
-static void qemu_s390_stattrib_class_init(ObjectClass *oc, void *data)
+static void qemu_s390_stattrib_class_init(ObjectClass *oc, const void *data)
 {
     S390StAttribClass *sa_cl = S390_STATTRIB_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -360,7 +360,7 @@ static void s390_stattrib_realize(DeviceState *dev, Error **errp)
                          &savevm_s390_stattrib_handlers, dev);
 }
 
-static void s390_stattrib_class_init(ObjectClass *oc, void *data)
+static void s390_stattrib_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 52c273b3de..94edd42dd2 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -35,7 +35,7 @@
 #include "hw/s390x/css-bridge.h"
 #include "hw/s390x/ap-bridge.h"
 #include "migration/register.h"
-#include "cpu_models.h"
+#include "target/s390x/cpu_models.h"
 #include "hw/nmi.h"
 #include "hw/qdev-properties.h"
 #include "hw/s390x/tod.h"
@@ -804,7 +804,7 @@ static void machine_set_loadparm(Object *obj, Visitor *v,
     s390_ipl_fmt_loadparm(ms->loadparm, val, errp);
 }
 
-static void ccw_machine_class_init(ObjectClass *oc, void *data)
+static void ccw_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     NMIClass *nc = NMI_CLASS(oc);
@@ -875,7 +875,7 @@ static const TypeInfo ccw_machine_info = {
     .instance_init = s390_machine_initfn,
     .class_size = sizeof(S390CcwMachineClass),
     .class_init    = ccw_machine_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_NMI },
         { TYPE_HOTPLUG_HANDLER},
         { TYPE_DUMP_SKEYS_INTERFACE},
@@ -892,7 +892,7 @@ static const TypeInfo ccw_machine_info = {
     }                                                                         \
     static void MACHINE_VER_SYM(class_init, ccw, __VA_ARGS__)(                \
         ObjectClass *oc,                                                      \
-        void *data)                                                           \
+        const void *data)                                                     \
     {                                                                         \
         MachineClass *mc = MACHINE_CLASS(oc);                                 \
         MACHINE_VER_SYM(class_options, ccw, __VA_ARGS__)(mc);                 \
diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
index 5945c9b1d8..9718564fa4 100644
--- a/hw/s390x/sclp.c
+++ b/hw/s390x/sclp.c
@@ -424,7 +424,7 @@ static void sclp_init(Object *obj)
     sclp_memory_init(sclp);
 }
 
-static void sclp_class_init(ObjectClass *oc, void *data)
+static void sclp_class_init(ObjectClass *oc, const void *data)
 {
     SCLPDeviceClass *sc = SCLP_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
diff --git a/hw/s390x/sclpcpu.c b/hw/s390x/sclpcpu.c
index a178a9dd4c..4b6ebfed46 100644
--- a/hw/s390x/sclpcpu.c
+++ b/hw/s390x/sclpcpu.c
@@ -73,7 +73,7 @@ static int read_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr,
     return 1;
 }
 
-static void sclp_cpu_class_init(ObjectClass *oc, void *data)
+static void sclp_cpu_class_init(ObjectClass *oc, const void *data)
 {
     SCLPEventClass *k = SCLP_EVENT_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
diff --git a/hw/s390x/sclpquiesce.c b/hw/s390x/sclpquiesce.c
index 7bb5aad520..da4c8f3e36 100644
--- a/hw/s390x/sclpquiesce.c
+++ b/hw/s390x/sclpquiesce.c
@@ -112,7 +112,7 @@ static void quiesce_reset(DeviceState *dev)
    event->event_pending = false;
 }
 
-static void quiesce_class_init(ObjectClass *klass, void *data)
+static void quiesce_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SCLPEventClass *k = SCLP_EVENT_CLASS(klass);
diff --git a/hw/s390x/tod-kvm.c b/hw/s390x/tod-kvm.c
index 5da9037e0c..c9b8896b63 100644
--- a/hw/s390x/tod-kvm.c
+++ b/hw/s390x/tod-kvm.c
@@ -133,7 +133,7 @@ static void kvm_s390_tod_realize(DeviceState *dev, Error **errp)
     qemu_add_vm_change_state_handler(kvm_s390_tod_vm_state_change, td);
 }
 
-static void kvm_s390_tod_class_init(ObjectClass *oc, void *data)
+static void kvm_s390_tod_class_init(ObjectClass *oc, const void *data)
 {
     S390TODClass *tdc = S390_TOD_CLASS(oc);
 
diff --git a/hw/s390x/tod-tcg.c b/hw/s390x/tod-tcg.c
index 3b3ef8843e..0cc96624e1 100644
--- a/hw/s390x/tod-tcg.c
+++ b/hw/s390x/tod-tcg.c
@@ -52,7 +52,7 @@ static void qemu_s390_tod_set(S390TODState *td, const S390TOD *tod,
     }
 }
 
-static void qemu_s390_tod_class_init(ObjectClass *oc, void *data)
+static void qemu_s390_tod_class_init(ObjectClass *oc, const void *data)
 {
     S390TODClass *tdc = S390_TOD_CLASS(oc);
 
diff --git a/hw/s390x/tod.c b/hw/s390x/tod.c
index 6afbb23fc7..3f913cc88a 100644
--- a/hw/s390x/tod.c
+++ b/hw/s390x/tod.c
@@ -111,7 +111,7 @@ static void s390_tod_realize(DeviceState *dev, Error **errp)
     register_savevm_live("todclock", 0, 1, &savevm_tod, td);
 }
 
-static void s390_tod_class_init(ObjectClass *oc, void *data)
+static void s390_tod_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/s390x/vhost-scsi-ccw.c b/hw/s390x/vhost-scsi-ccw.c
index e6bf0c55bc..8341b23a95 100644
--- a/hw/s390x/vhost-scsi-ccw.c
+++ b/hw/s390x/vhost-scsi-ccw.c
@@ -46,7 +46,7 @@ static const Property vhost_ccw_scsi_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
+static void vhost_ccw_scsi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/vhost-user-fs-ccw.c b/hw/s390x/vhost-user-fs-ccw.c
index 6a9654d77b..cc1b8227fc 100644
--- a/hw/s390x/vhost-user-fs-ccw.c
+++ b/hw/s390x/vhost-user-fs-ccw.c
@@ -48,7 +48,7 @@ static void vhost_user_fs_ccw_instance_init(Object *obj)
                                 TYPE_VHOST_USER_FS);
 }
 
-static void vhost_user_fs_ccw_class_init(ObjectClass *klass, void *data)
+static void vhost_user_fs_ccw_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/vhost-vsock-ccw.c b/hw/s390x/vhost-vsock-ccw.c
index 875ccf3485..552e9e86a4 100644
--- a/hw/s390x/vhost-vsock-ccw.c
+++ b/hw/s390x/vhost-vsock-ccw.c
@@ -35,7 +35,7 @@ static void vhost_vsock_ccw_realize(VirtioCcwDevice *ccw_dev, Error **errp)
     qdev_realize(vdev, BUS(&ccw_dev->bus), errp);
 }
 
-static void vhost_vsock_ccw_class_init(ObjectClass *klass, void *data)
+static void vhost_vsock_ccw_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-9p.c b/hw/s390x/virtio-ccw-9p.c
index 287ae2ba76..72bf6ec80c 100644
--- a/hw/s390x/virtio-ccw-9p.c
+++ b/hw/s390x/virtio-ccw-9p.c
@@ -48,7 +48,7 @@ static const Property virtio_ccw_9p_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void virtio_ccw_9p_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_9p_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-balloon.c b/hw/s390x/virtio-ccw-balloon.c
index 1180efaf6d..399b40f366 100644
--- a/hw/s390x/virtio-ccw-balloon.c
+++ b/hw/s390x/virtio-ccw-balloon.c
@@ -53,7 +53,7 @@ static const Property virtio_ccw_balloon_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_balloon_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-blk.c b/hw/s390x/virtio-ccw-blk.c
index db9d442ffb..7d8c4a75ce 100644
--- a/hw/s390x/virtio-ccw-blk.c
+++ b/hw/s390x/virtio-ccw-blk.c
@@ -51,7 +51,7 @@ static const Property virtio_ccw_blk_properties[] = {
     DEFINE_PROP_CCW_LOADPARM("loadparm", CcwDevice, loadparm),
 };
 
-static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_blk_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-crypto.c b/hw/s390x/virtio-ccw-crypto.c
index b693f87c70..75e714603b 100644
--- a/hw/s390x/virtio-ccw-crypto.c
+++ b/hw/s390x/virtio-ccw-crypto.c
@@ -51,7 +51,7 @@ static const Property virtio_ccw_crypto_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void virtio_ccw_crypto_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_crypto_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-gpu.c b/hw/s390x/virtio-ccw-gpu.c
index a6b14c25d9..edb6a47d37 100644
--- a/hw/s390x/virtio-ccw-gpu.c
+++ b/hw/s390x/virtio-ccw-gpu.c
@@ -49,7 +49,7 @@ static const Property virtio_ccw_gpu_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void virtio_ccw_gpu_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_gpu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-input.c b/hw/s390x/virtio-ccw-input.c
index 6ca10d58ee..2250d8cf98 100644
--- a/hw/s390x/virtio-ccw-input.c
+++ b/hw/s390x/virtio-ccw-input.c
@@ -50,7 +50,7 @@ static const Property virtio_ccw_input_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void virtio_ccw_input_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_input_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-md.c b/hw/s390x/virtio-ccw-md.c
index de333282df..0370f58450 100644
--- a/hw/s390x/virtio-ccw-md.c
+++ b/hw/s390x/virtio-ccw-md.c
@@ -140,7 +140,7 @@ static const TypeInfo virtio_ccw_md_info = {
     .instance_size = sizeof(VirtIOMDCcw),
     .class_size = sizeof(VirtIOMDCcwClass),
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_MEMORY_DEVICE },
         { }
     },
diff --git a/hw/s390x/virtio-ccw-mem.c b/hw/s390x/virtio-ccw-mem.c
index 90fd89f015..daa485d189 100644
--- a/hw/s390x/virtio-ccw-mem.c
+++ b/hw/s390x/virtio-ccw-mem.c
@@ -160,7 +160,7 @@ static const Property virtio_ccw_mem_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void virtio_ccw_mem_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_mem_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-net.c b/hw/s390x/virtio-ccw-net.c
index 80a5581baf..a7d4afbeb9 100644
--- a/hw/s390x/virtio-ccw-net.c
+++ b/hw/s390x/virtio-ccw-net.c
@@ -54,7 +54,7 @@ static const Property virtio_ccw_net_properties[] = {
     DEFINE_PROP_CCW_LOADPARM("loadparm", CcwDevice, loadparm),
 };
 
-static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_net_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-rng.c b/hw/s390x/virtio-ccw-rng.c
index ccd124ee91..3263287d45 100644
--- a/hw/s390x/virtio-ccw-rng.c
+++ b/hw/s390x/virtio-ccw-rng.c
@@ -50,7 +50,7 @@ static const Property virtio_ccw_rng_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_rng_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-scsi.c b/hw/s390x/virtio-ccw-scsi.c
index bfcea3cfe7..06b4c6c4a5 100644
--- a/hw/s390x/virtio-ccw-scsi.c
+++ b/hw/s390x/virtio-ccw-scsi.c
@@ -60,7 +60,7 @@ static const Property virtio_ccw_scsi_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_scsi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw-serial.c b/hw/s390x/virtio-ccw-serial.c
index 59743d1e25..0dac590c08 100644
--- a/hw/s390x/virtio-ccw-serial.c
+++ b/hw/s390x/virtio-ccw-serial.c
@@ -60,7 +60,7 @@ static const Property virtio_ccw_serial_properties[] = {
                        VIRTIO_CCW_MAX_REV),
 };
 
-static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_serial_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index e8ecb90826..d2f85b39f3 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -1228,7 +1228,7 @@ static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
     virtio_ccw_stop_ioeventfd(_dev);
 }
 
-static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     CCWDeviceClass *k = CCW_DEVICE_CLASS(dc);
@@ -1262,7 +1262,7 @@ static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
     qbus_init(bus, bus_size, TYPE_VIRTIO_CCW_BUS, qdev, virtio_bus_name);
 }
 
-static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
+static void virtio_ccw_bus_class_init(ObjectClass *klass, const void *data)
 {
     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
     BusClass *bus_class = BUS_CLASS(klass);
diff --git a/hw/scsi/esp-pci.c b/hw/scsi/esp-pci.c
index fe4e045a6f..12c86eb7aa 100644
--- a/hw/scsi/esp-pci.c
+++ b/hw/scsi/esp-pci.c
@@ -427,7 +427,7 @@ static void esp_pci_init(Object *obj)
     object_initialize_child(obj, "esp", &pci->esp, TYPE_ESP);
 }
 
-static void esp_pci_class_init(ObjectClass *klass, void *data)
+static void esp_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -450,7 +450,7 @@ static const TypeInfo esp_pci_info = {
     .instance_init = esp_pci_init,
     .instance_size = sizeof(PCIESPState),
     .class_init = esp_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -557,7 +557,7 @@ static void dc390_scsi_realize(PCIDevice *dev, Error **errp)
     contents[EE_CHKSUM2] = chksum >> 8;
 }
 
-static void dc390_class_init(ObjectClass *klass, void *data)
+static void dc390_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c
index 01bdfe2701..f24991fd16 100644
--- a/hw/scsi/esp.c
+++ b/hw/scsi/esp.c
@@ -1568,7 +1568,7 @@ static const VMStateDescription vmstate_sysbus_esp_scsi = {
     }
 };
 
-static void sysbus_esp_class_init(ObjectClass *klass, void *data)
+static void sysbus_esp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1594,7 +1594,7 @@ static void esp_init(Object *obj)
     fifo8_create(&s->cmdfifo, ESP_CMDFIFO_SZ);
 }
 
-static void esp_class_init(ObjectClass *klass, void *data)
+static void esp_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
index 6689ebba25..f4f2ef321e 100644
--- a/hw/scsi/lsi53c895a.c
+++ b/hw/scsi/lsi53c895a.c
@@ -2375,7 +2375,7 @@ static void lsi_scsi_exit(PCIDevice *dev)
     timer_free(s->scripts_timer);
 }
 
-static void lsi_class_init(ObjectClass *klass, void *data)
+static void lsi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -2396,13 +2396,13 @@ static const TypeInfo lsi_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(LSIState),
     .class_init    = lsi_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-static void lsi53c810_class_init(ObjectClass *klass, void *data)
+static void lsi53c810_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index d56bfc711d..55cd188bd5 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -2486,7 +2486,7 @@ typedef struct MegasasInfo {
     const VMStateDescription *vmsd;
     const Property *props;
     size_t props_count;
-    InterfaceInfo *interfaces;
+    const InterfaceInfo *interfaces;
 } MegasasInfo;
 
 static struct MegasasInfo megasas_devices[] = {
@@ -2503,7 +2503,7 @@ static struct MegasasInfo megasas_devices[] = {
         .vmsd = &vmstate_megasas_gen1,
         .props = megasas_properties_gen1,
         .props_count = ARRAY_SIZE(megasas_properties_gen1),
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { INTERFACE_CONVENTIONAL_PCI_DEVICE },
             { },
         },
@@ -2520,14 +2520,14 @@ static struct MegasasInfo megasas_devices[] = {
         .vmsd = &vmstate_megasas_gen2,
         .props = megasas_properties_gen2,
         .props_count = ARRAY_SIZE(megasas_properties_gen2),
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { INTERFACE_PCIE_DEVICE },
             { }
         },
     }
 };
 
-static void megasas_class_init(ObjectClass *oc, void *data)
+static void megasas_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
@@ -2572,7 +2572,7 @@ static void megasas_register_types(void)
 
         type_info.name = info->name;
         type_info.parent = TYPE_MEGASAS_BASE;
-        type_info.class_data = (void *)info;
+        type_info.class_data = info;
         type_info.class_init = megasas_class_init;
         type_info.interfaces = info->interfaces;
 
diff --git a/hw/scsi/mptsas.c b/hw/scsi/mptsas.c
index ba7a7d0770..1ebe0b82a7 100644
--- a/hw/scsi/mptsas.c
+++ b/hw/scsi/mptsas.c
@@ -1416,7 +1416,7 @@ static const Property mptsas_properties[] = {
     DEFINE_PROP_ON_OFF_AUTO("msi", MPTSASState, msi, ON_OFF_AUTO_AUTO),
 };
 
-static void mptsas1068_class_init(ObjectClass *oc, void *data)
+static void mptsas1068_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
@@ -1441,7 +1441,7 @@ static const TypeInfo mptsas_info = {
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(MPTSASState),
     .class_init = mptsas1068_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index ece1107ee8..70be4a7367 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -2001,7 +2001,7 @@ static const Property scsi_props[] = {
     DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1),
 };
 
-static void scsi_device_class_init(ObjectClass *klass, void *data)
+static void scsi_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
@@ -2030,7 +2030,7 @@ static const TypeInfo scsi_device_type_info = {
     .instance_init = scsi_dev_instance_init,
 };
 
-static void scsi_bus_class_init(ObjectClass *klass, void *data)
+static void scsi_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
@@ -2046,7 +2046,7 @@ static const TypeInfo scsi_bus_info = {
     .parent = TYPE_BUS,
     .instance_size = sizeof(SCSIBus),
     .class_init = scsi_bus_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index e59632e9b1..cb4af1b715 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -3177,7 +3177,7 @@ static void scsi_property_add_specifics(DeviceClass *dc)
     }
 }
 
-static void scsi_disk_base_class_initfn(ObjectClass *klass, void *data)
+static void scsi_disk_base_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass);
@@ -3247,7 +3247,7 @@ static const VMStateDescription vmstate_scsi_disk_state = {
     }
 };
 
-static void scsi_hd_class_initfn(ObjectClass *klass, void *data)
+static void scsi_hd_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
@@ -3289,7 +3289,7 @@ static const Property scsi_cd_properties[] = {
                     SCSI_DISK_QUIRK_MODE_PAGE_TRUNCATED, 0),
 };
 
-static void scsi_cd_class_initfn(ObjectClass *klass, void *data)
+static void scsi_cd_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
@@ -3326,7 +3326,7 @@ static const Property scsi_block_properties[] = {
                        DEFAULT_IO_TIMEOUT),
 };
 
-static void scsi_block_class_initfn(ObjectClass *klass, void *data)
+static void scsi_block_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
diff --git a/hw/scsi/scsi-generic.c b/hw/scsi/scsi-generic.c
index 6566720064..9e380a2109 100644
--- a/hw/scsi/scsi-generic.c
+++ b/hw/scsi/scsi-generic.c
@@ -786,7 +786,7 @@ static int scsi_generic_parse_cdb(SCSIDevice *dev, SCSICommand *cmd,
     return scsi_bus_parse_cdb(dev, cmd, buf, buf_len, hba_private);
 }
 
-static void scsi_generic_class_initfn(ObjectClass *klass, void *data)
+static void scsi_generic_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
diff --git a/hw/scsi/spapr_vscsi.c b/hw/scsi/spapr_vscsi.c
index 6962194eaa..20f70fb272 100644
--- a/hw/scsi/spapr_vscsi.c
+++ b/hw/scsi/spapr_vscsi.c
@@ -1267,7 +1267,7 @@ static const VMStateDescription vmstate_spapr_vscsi = {
     },
 };
 
-static void spapr_vscsi_class_init(ObjectClass *klass, void *data)
+static void spapr_vscsi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SpaprVioDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c
index 66e0c21c22..10fde8eee0 100644
--- a/hw/scsi/vhost-scsi.c
+++ b/hw/scsi/vhost-scsi.c
@@ -363,7 +363,7 @@ static const Property vhost_scsi_properties[] = {
                      conf.worker_per_virtqueue, false),
 };
 
-static void vhost_scsi_class_init(ObjectClass *klass, void *data)
+static void vhost_scsi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
@@ -397,7 +397,7 @@ static const TypeInfo vhost_scsi_info = {
     .instance_size = sizeof(VHostSCSI),
     .class_init = vhost_scsi_class_init,
     .instance_init = vhost_scsi_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_FW_PATH_PROVIDER },
         { }
     },
diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c
index adb41b9816..8298e8cc6d 100644
--- a/hw/scsi/vhost-user-scsi.c
+++ b/hw/scsi/vhost-user-scsi.c
@@ -386,7 +386,7 @@ static const VMStateDescription vmstate_vhost_scsi = {
     },
 };
 
-static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
+static void vhost_user_scsi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
@@ -422,7 +422,7 @@ static const TypeInfo vhost_user_scsi_info = {
     .instance_size = sizeof(VHostUserSCSI),
     .class_init = vhost_user_scsi_class_init,
     .instance_init = vhost_user_scsi_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_FW_PATH_PROVIDER },
         { }
     },
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index f5a3aa2366..34ae14f7bf 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -1395,7 +1395,7 @@ static const VMStateDescription vmstate_virtio_scsi = {
     },
 };
 
-static void virtio_scsi_common_class_init(ObjectClass *klass, void *data)
+static void virtio_scsi_common_class_init(ObjectClass *klass, const void *data)
 {
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -1404,7 +1404,7 @@ static void virtio_scsi_common_class_init(ObjectClass *klass, void *data)
     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 }
 
-static void virtio_scsi_class_init(ObjectClass *klass, void *data)
+static void virtio_scsi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
@@ -1438,7 +1438,7 @@ static const TypeInfo virtio_scsi_info = {
     .parent = TYPE_VIRTIO_SCSI_COMMON,
     .instance_size = sizeof(VirtIOSCSI),
     .class_init = virtio_scsi_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
diff --git a/hw/scsi/vmw_pvscsi.c b/hw/scsi/vmw_pvscsi.c
index f07e377cb8..d5825b6786 100644
--- a/hw/scsi/vmw_pvscsi.c
+++ b/hw/scsi/vmw_pvscsi.c
@@ -1317,7 +1317,7 @@ static void pvscsi_realize(DeviceState *qdev, Error **errp)
     pvs_c->parent_dc_realize(qdev, errp);
 }
 
-static void pvscsi_class_init(ObjectClass *klass, void *data)
+static void pvscsi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1346,7 +1346,7 @@ static const TypeInfo pvscsi_info = {
     .class_size    = sizeof(PVSCSIClass),
     .instance_size = sizeof(PVSCSIState),
     .class_init    = pvscsi_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { INTERFACE_PCIE_DEVICE },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
diff --git a/hw/sd/allwinner-sdhost.c b/hw/sd/allwinner-sdhost.c
index 03980d2716..b31da5c399 100644
--- a/hw/sd/allwinner-sdhost.c
+++ b/hw/sd/allwinner-sdhost.c
@@ -888,14 +888,15 @@ static void allwinner_sdhost_reset(DeviceState *dev)
     }
 }
 
-static void allwinner_sdhost_bus_class_init(ObjectClass *klass, void *data)
+static void allwinner_sdhost_bus_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     SDBusClass *sbc = SD_BUS_CLASS(klass);
 
     sbc->set_inserted = allwinner_sdhost_set_inserted;
 }
 
-static void allwinner_sdhost_class_init(ObjectClass *klass, void *data)
+static void allwinner_sdhost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -905,7 +906,8 @@ static void allwinner_sdhost_class_init(ObjectClass *klass, void *data)
     device_class_set_props(dc, allwinner_sdhost_properties);
 }
 
-static void allwinner_sdhost_sun4i_class_init(ObjectClass *klass, void *data)
+static void allwinner_sdhost_sun4i_class_init(ObjectClass *klass,
+                                              const void *data)
 {
     AwSdHostClass *sc = AW_SDHOST_CLASS(klass);
     sc->max_desc_size = 8 * KiB;
@@ -913,7 +915,8 @@ static void allwinner_sdhost_sun4i_class_init(ObjectClass *klass, void *data)
     sc->can_calibrate = false;
 }
 
-static void allwinner_sdhost_sun5i_class_init(ObjectClass *klass, void *data)
+static void allwinner_sdhost_sun5i_class_init(ObjectClass *klass,
+                                              const void *data)
 {
     AwSdHostClass *sc = AW_SDHOST_CLASS(klass);
     sc->max_desc_size = 64 * KiB;
@@ -922,7 +925,7 @@ static void allwinner_sdhost_sun5i_class_init(ObjectClass *klass, void *data)
 }
 
 static void allwinner_sdhost_sun50i_a64_class_init(ObjectClass *klass,
-                                                   void *data)
+                                                   const void *data)
 {
     AwSdHostClass *sc = AW_SDHOST_CLASS(klass);
     sc->max_desc_size = 64 * KiB;
@@ -931,7 +934,7 @@ static void allwinner_sdhost_sun50i_a64_class_init(ObjectClass *klass,
 }
 
 static void allwinner_sdhost_sun50i_a64_emmc_class_init(ObjectClass *klass,
-                                                        void *data)
+                                                        const void *data)
 {
     AwSdHostClass *sc = AW_SDHOST_CLASS(klass);
     sc->max_desc_size = 8 * KiB;
diff --git a/hw/sd/aspeed_sdhci.c b/hw/sd/aspeed_sdhci.c
index 12cbbae5e7..fc38ad39ce 100644
--- a/hw/sd/aspeed_sdhci.c
+++ b/hw/sd/aspeed_sdhci.c
@@ -208,7 +208,7 @@ static const Property aspeed_sdhci_properties[] = {
     DEFINE_PROP_UINT8("num-slots", AspeedSDHCIState, num_slots, 0),
 };
 
-static void aspeed_sdhci_class_init(ObjectClass *classp, void *data)
+static void aspeed_sdhci_class_init(ObjectClass *classp, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(classp);
 
@@ -218,7 +218,7 @@ static void aspeed_sdhci_class_init(ObjectClass *classp, void *data)
     device_class_set_props(dc, aspeed_sdhci_properties);
 }
 
-static void aspeed_2400_sdhci_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_sdhci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSDHCIClass *asc = ASPEED_SDHCI_CLASS(klass);
@@ -227,7 +227,7 @@ static void aspeed_2400_sdhci_class_init(ObjectClass *klass, void *data)
     asc->capareg = 0x0000000001e80080;
 }
 
-static void aspeed_2500_sdhci_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_sdhci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSDHCIClass *asc = ASPEED_SDHCI_CLASS(klass);
@@ -236,7 +236,7 @@ static void aspeed_2500_sdhci_class_init(ObjectClass *klass, void *data)
     asc->capareg = 0x0000000001e80080;
 }
 
-static void aspeed_2600_sdhci_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_sdhci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSDHCIClass *asc = ASPEED_SDHCI_CLASS(klass);
@@ -245,7 +245,7 @@ static void aspeed_2600_sdhci_class_init(ObjectClass *klass, void *data)
     asc->capareg = 0x0000000701f80080;
 }
 
-static void aspeed_2700_sdhci_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_sdhci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSDHCIClass *asc = ASPEED_SDHCI_CLASS(klass);
diff --git a/hw/sd/bcm2835_sdhost.c b/hw/sd/bcm2835_sdhost.c
index 0724949d0c..29debdf59e 100644
--- a/hw/sd/bcm2835_sdhost.c
+++ b/hw/sd/bcm2835_sdhost.c
@@ -428,7 +428,7 @@ static void bcm2835_sdhost_reset(DeviceState *dev)
     s->fifo_len = 0;
 }
 
-static void bcm2835_sdhost_class_init(ObjectClass *klass, void *data)
+static void bcm2835_sdhost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/sd/cadence_sdhci.c b/hw/sd/cadence_sdhci.c
index ad9daa20ed..d576855a1a 100644
--- a/hw/sd/cadence_sdhci.c
+++ b/hw/sd/cadence_sdhci.c
@@ -165,7 +165,7 @@ static const VMStateDescription vmstate_cadence_sdhci = {
     },
 };
 
-static void cadence_sdhci_class_init(ObjectClass *classp, void *data)
+static void cadence_sdhci_class_init(ObjectClass *classp, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(classp);
 
diff --git a/hw/sd/npcm7xx_sdhci.c b/hw/sd/npcm7xx_sdhci.c
index 99028c1a2c..0233d7bd4d 100644
--- a/hw/sd/npcm7xx_sdhci.c
+++ b/hw/sd/npcm7xx_sdhci.c
@@ -149,7 +149,7 @@ static const VMStateDescription vmstate_npcm7xx_sdhci = {
     },
 };
 
-static void npcm7xx_sdhci_class_init(ObjectClass *classp, void *data)
+static void npcm7xx_sdhci_class_init(ObjectClass *classp, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(classp);
 
diff --git a/hw/sd/omap_mmc.c b/hw/sd/omap_mmc.c
index bbe7b971bb..b7648d41cc 100644
--- a/hw/sd/omap_mmc.c
+++ b/hw/sd/omap_mmc.c
@@ -612,7 +612,7 @@ static void omap_mmc_initfn(Object *obj)
     qbus_init(&s->sdbus, sizeof(s->sdbus), TYPE_SD_BUS, DEVICE(obj), "sd-bus");
 }
 
-static void omap_mmc_class_init(ObjectClass *oc, void *data)
+static void omap_mmc_class_init(ObjectClass *oc, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(oc);
 
diff --git a/hw/sd/pl181.c b/hw/sd/pl181.c
index 03d2ae7d21..b8fc9f86f1 100644
--- a/hw/sd/pl181.c
+++ b/hw/sd/pl181.c
@@ -509,7 +509,7 @@ static void pl181_init(Object *obj)
     qbus_init(&s->sdbus, sizeof(s->sdbus), TYPE_PL181_BUS, dev, "sd-bus");
 }
 
-static void pl181_class_init(ObjectClass *klass, void *data)
+static void pl181_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
 
@@ -519,7 +519,7 @@ static void pl181_class_init(ObjectClass *klass, void *data)
     k->user_creatable = false;
 }
 
-static void pl181_bus_class_init(ObjectClass *klass, void *data)
+static void pl181_bus_class_init(ObjectClass *klass, const void *data)
 {
     SDBusClass *sbc = SD_BUS_CLASS(klass);
 
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index e541c57f8c..c275fdda2d 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -2751,7 +2751,7 @@ static const Property emmc_properties[] = {
     DEFINE_PROP_UINT8("boot-config", SDState, boot_config, 0x0),
 };
 
-static void sdmmc_common_class_init(ObjectClass *klass, void *data)
+static void sdmmc_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SDCardClass *sc = SDMMC_COMMON_CLASS(klass);
@@ -2774,7 +2774,7 @@ static void sdmmc_common_class_init(ObjectClass *klass, void *data)
     sc->get_readonly = sd_get_readonly;
 }
 
-static void sd_class_init(ObjectClass *klass, void *data)
+static void sd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SDCardClass *sc = SDMMC_COMMON_CLASS(klass);
@@ -2793,7 +2793,7 @@ static void sd_class_init(ObjectClass *klass, void *data)
  * board to ensure that ssi transfers only occur when the chip select
  * is asserted.
  */
-static void sd_spi_class_init(ObjectClass *klass, void *data)
+static void sd_spi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SDCardClass *sc = SDMMC_COMMON_CLASS(klass);
@@ -2802,7 +2802,7 @@ static void sd_spi_class_init(ObjectClass *klass, void *data)
     sc->proto = &sd_proto_spi;
 }
 
-static void emmc_class_init(ObjectClass *klass, void *data)
+static void emmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SDCardClass *sc = SDMMC_COMMON_CLASS(klass);
diff --git a/hw/sd/sdhci-pci.c b/hw/sd/sdhci-pci.c
index bca149e811..c18b91fe63 100644
--- a/hw/sd/sdhci-pci.c
+++ b/hw/sd/sdhci-pci.c
@@ -54,7 +54,7 @@ static void sdhci_pci_exit(PCIDevice *dev)
     sdhci_uninitfn(s);
 }
 
-static void sdhci_pci_class_init(ObjectClass *klass, void *data)
+static void sdhci_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -75,7 +75,7 @@ static const TypeInfo sdhci_pci_types[] = {
         .parent         = TYPE_PCI_DEVICE,
         .instance_size  = sizeof(SDHCIState),
         .class_init     = sdhci_pci_class_init,
-        .interfaces     = (InterfaceInfo[]) {
+        .interfaces     = (const InterfaceInfo[]) {
             { INTERFACE_CONVENTIONAL_PCI_DEVICE },
             { },
         },
diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
index 69baf73ae9..226ff133ff 100644
--- a/hw/sd/sdhci.c
+++ b/hw/sd/sdhci.c
@@ -1620,7 +1620,7 @@ static void sdhci_sysbus_unrealize(DeviceState *dev)
     }
 }
 
-static void sdhci_sysbus_class_init(ObjectClass *klass, void *data)
+static void sdhci_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1633,7 +1633,7 @@ static void sdhci_sysbus_class_init(ObjectClass *klass, void *data)
 
 /* --- qdev bus master --- */
 
-static void sdhci_bus_class_init(ObjectClass *klass, void *data)
+static void sdhci_bus_class_init(ObjectClass *klass, const void *data)
 {
     SDBusClass *sbc = SD_BUS_CLASS(klass);
 
diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
index c4a58da0ab..6c90a86ab4 100644
--- a/hw/sd/ssi-sd.c
+++ b/hw/sd/ssi-sd.c
@@ -389,7 +389,7 @@ static void ssi_sd_reset(DeviceState *dev)
     s->stopping = 0;
 }
 
-static void ssi_sd_class_init(ObjectClass *klass, void *data)
+static void ssi_sd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
diff --git a/hw/sensor/adm1266.c b/hw/sensor/adm1266.c
index 25b87a7296..9017ce6116 100644
--- a/hw/sensor/adm1266.c
+++ b/hw/sensor/adm1266.c
@@ -223,7 +223,7 @@ static void adm1266_init(Object *obj)
     }
 }
 
-static void adm1266_class_init(ObjectClass *klass, void *data)
+static void adm1266_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/sensor/adm1272.c b/hw/sensor/adm1272.c
index 3fc1e5d0ad..0c739aa0d8 100644
--- a/hw/sensor/adm1272.c
+++ b/hw/sensor/adm1272.c
@@ -511,7 +511,7 @@ static void adm1272_init(Object *obj)
 
 }
 
-static void adm1272_class_init(ObjectClass *klass, void *data)
+static void adm1272_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/sensor/dps310.c b/hw/sensor/dps310.c
index 6966a53248..bcf615423a 100644
--- a/hw/sensor/dps310.c
+++ b/hw/sensor/dps310.c
@@ -197,7 +197,7 @@ static const VMStateDescription vmstate_dps310 = {
     }
 };
 
-static void dps310_class_init(ObjectClass *klass, void *data)
+static void dps310_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
diff --git a/hw/sensor/emc141x.c b/hw/sensor/emc141x.c
index 33c1bd330f..7b2ce383a1 100644
--- a/hw/sensor/emc141x.c
+++ b/hw/sensor/emc141x.c
@@ -277,7 +277,7 @@ static void emc141x_class_init(ObjectClass *klass, const void *data)
     dc->vmsd = &vmstate_emc141x;
 }
 
-static void emc1413_class_init(ObjectClass *klass, void *data)
+static void emc1413_class_init(ObjectClass *klass, const void *data)
 {
     EMC141XClass *ec = EMC141X_CLASS(klass);
 
@@ -286,7 +286,7 @@ static void emc1413_class_init(ObjectClass *klass, void *data)
     ec->sensors_count = 3;
 }
 
-static void emc1414_class_init(ObjectClass *klass, void *data)
+static void emc1414_class_init(ObjectClass *klass, const void *data)
 {
     EMC141XClass *ec = EMC141X_CLASS(klass);
 
diff --git a/hw/sensor/isl_pmbus_vr.c b/hw/sensor/isl_pmbus_vr.c
index c60282cfe7..e8d29b08ff 100644
--- a/hw/sensor/isl_pmbus_vr.c
+++ b/hw/sensor/isl_pmbus_vr.c
@@ -242,7 +242,7 @@ static void isl_pmbus_vr_class_init(ObjectClass *klass, const void *data,
     k->device_num_pages = pages;
 }
 
-static void isl69260_class_init(ObjectClass *klass, void *data)
+static void isl69260_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -251,7 +251,7 @@ static void isl69260_class_init(ObjectClass *klass, void *data)
     isl_pmbus_vr_class_init(klass, data, 2);
 }
 
-static void raa228000_class_init(ObjectClass *klass, void *data)
+static void raa228000_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -260,7 +260,7 @@ static void raa228000_class_init(ObjectClass *klass, void *data)
     isl_pmbus_vr_class_init(klass, data, 1);
 }
 
-static void raa229004_class_init(ObjectClass *klass, void *data)
+static void raa229004_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -269,7 +269,7 @@ static void raa229004_class_init(ObjectClass *klass, void *data)
     isl_pmbus_vr_class_init(klass, data, 2);
 }
 
-static void isl69259_class_init(ObjectClass *klass, void *data)
+static void isl69259_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/sensor/lsm303dlhc_mag.c b/hw/sensor/lsm303dlhc_mag.c
index 04471539b5..f9e501da84 100644
--- a/hw/sensor/lsm303dlhc_mag.c
+++ b/hw/sensor/lsm303dlhc_mag.c
@@ -530,7 +530,7 @@ static void lsm303dlhc_mag_initfn(Object *obj)
 /*
  * Set the virtual method pointers (bus state change, tx/rx, etc.).
  */
-static void lsm303dlhc_mag_class_init(ObjectClass *klass, void *data)
+static void lsm303dlhc_mag_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
diff --git a/hw/sensor/max31785.c b/hw/sensor/max31785.c
index 3577a7c218..c75581455a 100644
--- a/hw/sensor/max31785.c
+++ b/hw/sensor/max31785.c
@@ -544,7 +544,7 @@ static void max31785_init(Object *obj)
     }
 }
 
-static void max31785_class_init(ObjectClass *klass, void *data)
+static void max31785_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/sensor/max34451.c b/hw/sensor/max34451.c
index 93b53f3db2..a369d2b531 100644
--- a/hw/sensor/max34451.c
+++ b/hw/sensor/max34451.c
@@ -746,7 +746,7 @@ static void max34451_init(Object *obj)
 
 }
 
-static void max34451_class_init(ObjectClass *klass, void *data)
+static void max34451_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/sensor/tmp105.c b/hw/sensor/tmp105.c
index ef2824f3e1..f5b61109e3 100644
--- a/hw/sensor/tmp105.c
+++ b/hw/sensor/tmp105.c
@@ -313,7 +313,7 @@ static void tmp105_initfn(Object *obj)
                         tmp105_set_temperature, NULL, NULL);
 }
 
-static void tmp105_class_init(ObjectClass *klass, void *data)
+static void tmp105_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
diff --git a/hw/sensor/tmp421.c b/hw/sensor/tmp421.c
index 007f7cd018..3421c44086 100644
--- a/hw/sensor/tmp421.c
+++ b/hw/sensor/tmp421.c
@@ -337,7 +337,7 @@ static void tmp421_realize(DeviceState *dev, Error **errp)
     tmp421_reset(&s->i2c);
 }
 
-static void tmp421_class_init(ObjectClass *klass, void *data)
+static void tmp421_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
@@ -382,7 +382,7 @@ static void tmp421_register_types(void)
             .name       = devices[i].name,
             .parent     = TYPE_TMP421,
             .class_init = tmp421_class_init,
-            .class_data = (void *) &devices[i],
+            .class_data = &devices[i],
         };
         type_register_static(&ti);
     }
diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
index edbf19d958..8ac7e625ef 100644
--- a/hw/sparc/sun4m.c
+++ b/hw/sparc/sun4m.c
@@ -595,7 +595,7 @@ static void idreg_realize(DeviceState *ds, Error **errp)
     sysbus_init_mmio(dev, &s->mem);
 }
 
-static void idreg_class_init(ObjectClass *oc, void *data)
+static void idreg_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -645,7 +645,7 @@ static void afx_realize(DeviceState *ds, Error **errp)
     sysbus_init_mmio(dev, &s->mem);
 }
 
-static void afx_class_init(ObjectClass *oc, void *data)
+static void afx_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -727,7 +727,7 @@ static void prom_realize(DeviceState *ds, Error **errp)
     sysbus_init_mmio(dev, &s->prom);
 }
 
-static void prom_class_init(ObjectClass *klass, void *data)
+static void prom_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -771,7 +771,7 @@ static void ram_initfn(Object *obj)
                                     "Valid value is ID of a hostmem backend");
 }
 
-static void ram_class_init(ObjectClass *klass, void *data)
+static void ram_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1098,7 +1098,7 @@ enum {
     ss600mp_id,
 };
 
-static void sun4m_machine_class_init(ObjectClass *oc, void *data)
+static void sun4m_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -1109,7 +1109,7 @@ static void sun4m_machine_class_init(ObjectClass *oc, void *data)
     mc->default_ram_id = "sun4m.ram";
 }
 
-static void ss5_class_init(ObjectClass *oc, void *data)
+static void ss5_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     Sun4mMachineClass *smc = SUN4M_MACHINE_CLASS(mc);
@@ -1146,7 +1146,7 @@ static void ss5_class_init(ObjectClass *oc, void *data)
     smc->hwdef = &ss5_hwdef;
 }
 
-static void ss10_class_init(ObjectClass *oc, void *data)
+static void ss10_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     Sun4mMachineClass *smc = SUN4M_MACHINE_CLASS(mc);
@@ -1181,7 +1181,7 @@ static void ss10_class_init(ObjectClass *oc, void *data)
     smc->hwdef = &ss10_hwdef;
 }
 
-static void ss600mp_class_init(ObjectClass *oc, void *data)
+static void ss600mp_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     Sun4mMachineClass *smc = SUN4M_MACHINE_CLASS(mc);
@@ -1214,7 +1214,7 @@ static void ss600mp_class_init(ObjectClass *oc, void *data)
     smc->hwdef = &ss600mp_hwdef;
 }
 
-static void ss20_class_init(ObjectClass *oc, void *data)
+static void ss20_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     Sun4mMachineClass *smc = SUN4M_MACHINE_CLASS(mc);
@@ -1265,7 +1265,7 @@ static void ss20_class_init(ObjectClass *oc, void *data)
     smc->hwdef = &ss20_hwdef;
 }
 
-static void voyager_class_init(ObjectClass *oc, void *data)
+static void voyager_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     Sun4mMachineClass *smc = SUN4M_MACHINE_CLASS(mc);
@@ -1297,7 +1297,7 @@ static void voyager_class_init(ObjectClass *oc, void *data)
     smc->hwdef = &voyager_hwdef;
 }
 
-static void ss_lx_class_init(ObjectClass *oc, void *data)
+static void ss_lx_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     Sun4mMachineClass *smc = SUN4M_MACHINE_CLASS(mc);
@@ -1330,7 +1330,7 @@ static void ss_lx_class_init(ObjectClass *oc, void *data)
     smc->hwdef = &ss_lx_hwdef;
 }
 
-static void ss4_class_init(ObjectClass *oc, void *data)
+static void ss4_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     Sun4mMachineClass *smc = SUN4M_MACHINE_CLASS(mc);
@@ -1363,7 +1363,7 @@ static void ss4_class_init(ObjectClass *oc, void *data)
     smc->hwdef = &ss4_hwdef;
 }
 
-static void scls_class_init(ObjectClass *oc, void *data)
+static void scls_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     Sun4mMachineClass *smc = SUN4M_MACHINE_CLASS(mc);
@@ -1395,7 +1395,7 @@ static void scls_class_init(ObjectClass *oc, void *data)
     smc->hwdef = &scls_hwdef;
 }
 
-static void sbook_class_init(ObjectClass *oc, void *data)
+static void sbook_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     Sun4mMachineClass *smc = SUN4M_MACHINE_CLASS(mc);
diff --git a/hw/sparc/sun4m_iommu.c b/hw/sparc/sun4m_iommu.c
index 4a542b18d2..a7ff36ee78 100644
--- a/hw/sparc/sun4m_iommu.c
+++ b/hw/sparc/sun4m_iommu.c
@@ -372,7 +372,7 @@ static const Property iommu_properties[] = {
     DEFINE_PROP_UINT32("version", IOMMUState, version, 0),
 };
 
-static void iommu_class_init(ObjectClass *klass, void *data)
+static void iommu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -389,7 +389,8 @@ static const TypeInfo iommu_info = {
     .class_init    = iommu_class_init,
 };
 
-static void sun4m_iommu_memory_region_class_init(ObjectClass *klass, void *data)
+static void sun4m_iommu_memory_region_class_init(ObjectClass *klass,
+                                                 const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/sparc64/niagara.c b/hw/sparc64/niagara.c
index 805ba6b1e3..1ffe92060a 100644
--- a/hw/sparc64/niagara.c
+++ b/hw/sparc64/niagara.c
@@ -157,7 +157,7 @@ static void niagara_init(MachineState *machine)
     sun4v_rtc_init(NIAGARA_RTC_BASE);
 }
 
-static void niagara_class_init(ObjectClass *oc, void *data)
+static void niagara_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index becdf3ea98..e9f9b0a4cb 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -266,7 +266,7 @@ static void power_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &d->power_mmio);
 }
 
-static void power_class_init(ObjectClass *klass, void *data)
+static void power_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -373,7 +373,7 @@ static const Property ebus_properties[] = {
                        console_serial_base, 0),
 };
 
-static void ebus_class_init(ObjectClass *klass, void *data)
+static void ebus_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -391,7 +391,7 @@ static const TypeInfo ebus_info = {
     .parent        = TYPE_PCI_DEVICE,
     .class_init    = ebus_class_init,
     .instance_size = sizeof(EbusState),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
@@ -464,7 +464,7 @@ static void prom_realize(DeviceState *ds, Error **errp)
     sysbus_init_mmio(dev, &s->prom);
 }
 
-static void prom_class_init(ObjectClass *klass, void *data)
+static void prom_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -524,7 +524,7 @@ static const Property ram_properties[] = {
     DEFINE_PROP_UINT64("size", RamDevice, size, 0),
 };
 
-static void ram_class_init(ObjectClass *klass, void *data)
+static void ram_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -787,7 +787,7 @@ static GlobalProperty hw_compat_sparc64[] = {
 };
 static const size_t hw_compat_sparc64_len = G_N_ELEMENTS(hw_compat_sparc64);
 
-static void sun4u_class_init(ObjectClass *oc, void *data)
+static void sun4u_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(oc);
@@ -811,13 +811,13 @@ static const TypeInfo sun4u_type = {
     .name = MACHINE_TYPE_NAME("sun4u"),
     .parent = TYPE_MACHINE,
     .class_init = sun4u_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_FW_PATH_PROVIDER },
         { }
     },
 };
 
-static void sun4v_class_init(ObjectClass *oc, void *data)
+static void sun4v_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/sparc64/sun4u_iommu.c b/hw/sparc64/sun4u_iommu.c
index 533fcae1fb..14645f475a 100644
--- a/hw/sparc64/sun4u_iommu.c
+++ b/hw/sparc64/sun4u_iommu.c
@@ -305,7 +305,7 @@ static void iommu_init(Object *obj)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-static void iommu_class_init(ObjectClass *klass, void *data)
+static void iommu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -320,7 +320,8 @@ static const TypeInfo iommu_info = {
     .class_init    = iommu_class_init,
 };
 
-static void sun4u_iommu_memory_region_class_init(ObjectClass *klass, void *data)
+static void sun4u_iommu_memory_region_class_init(ObjectClass *klass,
+                                                 const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/ssi/allwinner-a10-spi.c b/hw/ssi/allwinner-a10-spi.c
index d2f6bb9cdc..6b7cca8d32 100644
--- a/hw/ssi/allwinner-a10-spi.c
+++ b/hw/ssi/allwinner-a10-spi.c
@@ -535,7 +535,7 @@ static void allwinner_a10_spi_realize(DeviceState *dev, Error **errp)
     fifo8_create(&s->rx_fifo, AW_A10_SPI_FIFO_SIZE);
 }
 
-static void allwinner_a10_spi_class_init(ObjectClass *klass, void *data)
+static void allwinner_a10_spi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c
index faef1a8e5b..0d38f95c7a 100644
--- a/hw/ssi/aspeed_smc.c
+++ b/hw/ssi/aspeed_smc.c
@@ -1294,7 +1294,7 @@ static const Property aspeed_smc_properties[] = {
                      TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
-static void aspeed_smc_class_init(ObjectClass *klass, void *data)
+static void aspeed_smc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1341,7 +1341,7 @@ static const Property aspeed_smc_flash_properties[] = {
                      AspeedSMCState *),
 };
 
-static void aspeed_smc_flash_class_init(ObjectClass *klass, void *data)
+static void aspeed_smc_flash_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -1383,7 +1383,7 @@ static const AspeedSegments aspeed_2400_smc_segments[] = {
     { 0x10000000, 32 * MiB },
 };
 
-static void aspeed_2400_smc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_smc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1429,7 +1429,7 @@ static const AspeedSegments aspeed_2400_fmc_segments[] = {
     { 0x2A000000, 32 * MiB }
 };
 
-static void aspeed_2400_fmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_fmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1473,7 +1473,7 @@ static int aspeed_2400_spi1_addr_width(const AspeedSMCState *s)
     return s->regs[R_SPI_CTRL0] & CTRL_AST2400_SPI_4BYTE ? 4 : 3;
 }
 
-static void aspeed_2400_spi1_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_spi1_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1515,7 +1515,7 @@ static const AspeedSegments aspeed_2500_fmc_segments[] = {
     { 0x2A000000,  32 * MiB },
 };
 
-static void aspeed_2500_fmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_fmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1555,7 +1555,7 @@ static const AspeedSegments aspeed_2500_spi1_segments[] = {
     { 0x32000000, 96 * MiB }, /* end address is readonly */
 };
 
-static void aspeed_2500_spi1_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_spi1_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1591,7 +1591,7 @@ static const AspeedSegments aspeed_2500_spi2_segments[] = {
     { 0x3A000000, 96 * MiB }, /* end address is readonly */
 };
 
-static void aspeed_2500_spi2_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_spi2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1674,7 +1674,7 @@ static const AspeedSegments aspeed_2600_fmc_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_2600_fmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_fmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1715,7 +1715,7 @@ static const AspeedSegments aspeed_2600_spi1_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_2600_spi1_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_spi1_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1756,7 +1756,7 @@ static const AspeedSegments aspeed_2600_spi2_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_2600_spi2_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_spi2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1839,7 +1839,7 @@ static const AspeedSegments aspeed_1030_fmc_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_1030_fmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_1030_fmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1879,7 +1879,7 @@ static const AspeedSegments aspeed_1030_spi1_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_1030_spi1_class_init(ObjectClass *klass, void *data)
+static void aspeed_1030_spi1_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -1917,7 +1917,7 @@ static const AspeedSegments aspeed_1030_spi2_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_1030_spi2_class_init(ObjectClass *klass, void *data)
+static void aspeed_1030_spi2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -2022,7 +2022,7 @@ static const AspeedSegments aspeed_2700_fmc_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_2700_fmc_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_fmc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -2064,7 +2064,7 @@ static const AspeedSegments aspeed_2700_spi0_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_2700_spi0_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_spi0_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -2104,7 +2104,7 @@ static const AspeedSegments aspeed_2700_spi1_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_2700_spi1_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_spi1_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
@@ -2144,7 +2144,7 @@ static const AspeedSegments aspeed_2700_spi2_segments[] = {
     { 0x0, 0 }, /* disabled */
 };
 
-static void aspeed_2700_spi2_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_spi2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedSMCClass *asc = ASPEED_SMC_CLASS(klass);
diff --git a/hw/ssi/bcm2835_spi.c b/hw/ssi/bcm2835_spi.c
index ebd8809f7c..bf8ba35e04 100644
--- a/hw/ssi/bcm2835_spi.c
+++ b/hw/ssi/bcm2835_spi.c
@@ -264,7 +264,7 @@ static const VMStateDescription vmstate_bcm2835_spi = {
     }
 };
 
-static void bcm2835_spi_class_init(ObjectClass *klass, void *data)
+static void bcm2835_spi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ssi/ibex_spi_host.c b/hw/ssi/ibex_spi_host.c
index 6b28cda200..f05be68748 100644
--- a/hw/ssi/ibex_spi_host.c
+++ b/hw/ssi/ibex_spi_host.c
@@ -622,7 +622,7 @@ static void ibex_spi_host_init(Object *obj)
     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 }
 
-static void ibex_spi_host_class_init(ObjectClass *klass, void *data)
+static void ibex_spi_host_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = ibex_spi_host_realize;
diff --git a/hw/ssi/imx_spi.c b/hw/ssi/imx_spi.c
index 2e317879b4..1312f588d2 100644
--- a/hw/ssi/imx_spi.c
+++ b/hw/ssi/imx_spi.c
@@ -475,7 +475,7 @@ static void imx_spi_realize(DeviceState *dev, Error **errp)
     fifo32_create(&s->rx_fifo, ECSPI_FIFO_SIZE);
 }
 
-static void imx_spi_class_init(ObjectClass *klass, void *data)
+static void imx_spi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ssi/mss-spi.c b/hw/ssi/mss-spi.c
index 340adcdd3f..fd7ba7eeb0 100644
--- a/hw/ssi/mss-spi.c
+++ b/hw/ssi/mss-spi.c
@@ -398,7 +398,7 @@ static const VMStateDescription vmstate_mss_spi = {
     }
 };
 
-static void mss_spi_class_init(ObjectClass *klass, void *data)
+static void mss_spi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ssi/npcm7xx_fiu.c b/hw/ssi/npcm7xx_fiu.c
index 8df4bec3f1..056ce13394 100644
--- a/hw/ssi/npcm7xx_fiu.c
+++ b/hw/ssi/npcm7xx_fiu.c
@@ -557,7 +557,7 @@ static const Property npcm7xx_fiu_properties[] = {
     DEFINE_PROP_SIZE("flash-size", NPCM7xxFIUState, flash_size, 0),
 };
 
-static void npcm7xx_fiu_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_fiu_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/ssi/npcm_pspi.c b/hw/ssi/npcm_pspi.c
index 41a5323530..a31dcc050e 100644
--- a/hw/ssi/npcm_pspi.c
+++ b/hw/ssi/npcm_pspi.c
@@ -199,7 +199,7 @@ static const VMStateDescription vmstate_npcm_pspi = {
 };
 
 
-static void npcm_pspi_class_init(ObjectClass *klass, void *data)
+static void npcm_pspi_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/ssi/pl022.c b/hw/ssi/pl022.c
index 53c9c225ad..1dc0bcbcc0 100644
--- a/hw/ssi/pl022.c
+++ b/hw/ssi/pl022.c
@@ -292,7 +292,7 @@ static void pl022_realize(DeviceState *dev, Error **errp)
     s->ssi = ssi_create_bus(dev, "ssi");
 }
 
-static void pl022_class_init(ObjectClass *klass, void *data)
+static void pl022_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ssi/pnv_spi.c b/hw/ssi/pnv_spi.c
index 367a2ff3bb..f40e8836b9 100644
--- a/hw/ssi/pnv_spi.c
+++ b/hw/ssi/pnv_spi.c
@@ -1199,7 +1199,7 @@ static int pnv_spi_dt_xscom(PnvXScomInterface *dev, void *fdt,
     return 0;
 }
 
-static void pnv_spi_class_init(ObjectClass *klass, void *data)
+static void pnv_spi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PnvXScomInterfaceClass *xscomc = PNV_XSCOM_INTERFACE_CLASS(klass);
@@ -1217,7 +1217,7 @@ static const TypeInfo pnv_spi_info = {
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(PnvSpi),
     .class_init    = pnv_spi_class_init,
-    .interfaces    = (InterfaceInfo[]) {
+    .interfaces    = (const InterfaceInfo[]) {
         { TYPE_PNV_XSCOM_INTERFACE },
         { }
     }
diff --git a/hw/ssi/sifive_spi.c b/hw/ssi/sifive_spi.c
index 76f8654f41..3e01fef61c 100644
--- a/hw/ssi/sifive_spi.c
+++ b/hw/ssi/sifive_spi.c
@@ -332,7 +332,7 @@ static const Property sifive_spi_properties[] = {
     DEFINE_PROP_UINT32("num-cs", SiFiveSPIState, num_cs, 1),
 };
 
-static void sifive_spi_class_init(ObjectClass *klass, void *data)
+static void sifive_spi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ssi/ssi.c b/hw/ssi/ssi.c
index 872c4e8036..d0de640fe6 100644
--- a/hw/ssi/ssi.c
+++ b/hw/ssi/ssi.c
@@ -55,7 +55,7 @@ static bool ssi_bus_check_address(BusState *b, DeviceState *dev, Error **errp)
     return true;
 }
 
-static void ssi_bus_class_init(ObjectClass *klass, void *data)
+static void ssi_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
 
@@ -112,7 +112,7 @@ static const Property ssi_peripheral_properties[] = {
     DEFINE_PROP_UINT8("cs", SSIPeripheral, cs_index, 0),
 };
 
-static void ssi_peripheral_class_init(ObjectClass *klass, void *data)
+static void ssi_peripheral_class_init(ObjectClass *klass, const void *data)
 {
     SSIPeripheralClass *ssc = SSI_PERIPHERAL_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/ssi/stm32f2xx_spi.c b/hw/ssi/stm32f2xx_spi.c
index ea9b74a409..871d57324d 100644
--- a/hw/ssi/stm32f2xx_spi.c
+++ b/hw/ssi/stm32f2xx_spi.c
@@ -202,7 +202,7 @@ static void stm32f2xx_spi_init(Object *obj)
     s->ssi = ssi_create_bus(dev, "ssi");
 }
 
-static void stm32f2xx_spi_class_init(ObjectClass *klass, void *data)
+static void stm32f2xx_spi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ssi/xilinx_spi.c b/hw/ssi/xilinx_spi.c
index be5baa6b35..4144c8a627 100644
--- a/hw/ssi/xilinx_spi.c
+++ b/hw/ssi/xilinx_spi.c
@@ -379,7 +379,7 @@ static const Property xilinx_spi_properties[] = {
     DEFINE_PROP_UINT8("num-ss-bits", XilinxSPI, num_cs, 1),
 };
 
-static void xilinx_spi_class_init(ObjectClass *klass, void *data)
+static void xilinx_spi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c
index 60d092039f..a79f3b8e49 100644
--- a/hw/ssi/xilinx_spips.c
+++ b/hw/ssi/xilinx_spips.c
@@ -1430,7 +1430,7 @@ static const Property xilinx_spips_properties[] = {
     DEFINE_PROP_UINT8("num-txrx-bytes", XilinxSPIPS, num_txrx_bytes, 1),
 };
 
-static void xilinx_qspips_class_init(ObjectClass *klass, void * data)
+static void xilinx_qspips_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
@@ -1442,7 +1442,7 @@ static void xilinx_qspips_class_init(ObjectClass *klass, void * data)
     xsc->tx_fifo_size = TXFF_A_Q;
 }
 
-static void xilinx_spips_class_init(ObjectClass *klass, void *data)
+static void xilinx_spips_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
@@ -1458,7 +1458,7 @@ static void xilinx_spips_class_init(ObjectClass *klass, void *data)
     xsc->tx_fifo_size = TXFF_A;
 }
 
-static void xlnx_zynqmp_qspips_class_init(ObjectClass *klass, void * data)
+static void xlnx_zynqmp_qspips_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
diff --git a/hw/ssi/xlnx-versal-ospi.c b/hw/ssi/xlnx-versal-ospi.c
index 9e96c9b69a..56d51ce0e3 100644
--- a/hw/ssi/xlnx-versal-ospi.c
+++ b/hw/ssi/xlnx-versal-ospi.c
@@ -1831,7 +1831,7 @@ static const Property xlnx_versal_ospi_properties[] = {
                      ind_write_disabled, false),
 };
 
-static void xlnx_versal_ospi_class_init(ObjectClass *klass, void *data)
+static void xlnx_versal_ospi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/a9gtimer.c b/hw/timer/a9gtimer.c
index 9835c35483..690140f5a6 100644
--- a/hw/timer/a9gtimer.c
+++ b/hw/timer/a9gtimer.c
@@ -377,7 +377,7 @@ static const Property a9_gtimer_properties[] = {
     DEFINE_PROP_UINT32("num-cpu", A9GTimerState, num_cpu, 0),
 };
 
-static void a9_gtimer_class_init(ObjectClass *klass, void *data)
+static void a9_gtimer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/allwinner-a10-pit.c b/hw/timer/allwinner-a10-pit.c
index da3d7173ef..e4c353273a 100644
--- a/hw/timer/allwinner-a10-pit.c
+++ b/hw/timer/allwinner-a10-pit.c
@@ -288,7 +288,7 @@ static void a10_pit_finalize(Object *obj)
     }
 }
 
-static void a10_pit_class_init(ObjectClass *klass, void *data)
+static void a10_pit_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/arm_mptimer.c b/hw/timer/arm_mptimer.c
index 803dad1e8a..7cc5915e9e 100644
--- a/hw/timer/arm_mptimer.c
+++ b/hw/timer/arm_mptimer.c
@@ -304,7 +304,7 @@ static const Property arm_mptimer_properties[] = {
     DEFINE_PROP_UINT32("num-cpu", ARMMPTimerState, num_cpu, 0),
 };
 
-static void arm_mptimer_class_init(ObjectClass *klass, void *data)
+static void arm_mptimer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/arm_timer.c b/hw/timer/arm_timer.c
index 1213b77aa0..56638ff5cd 100644
--- a/hw/timer/arm_timer.c
+++ b/hw/timer/arm_timer.c
@@ -392,7 +392,7 @@ static const Property sp804_properties[] = {
     DEFINE_PROP_UINT32("freq1", SP804State, freq1, 1000000),
 };
 
-static void sp804_class_init(ObjectClass *klass, void *data)
+static void sp804_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/armv7m_systick.c b/hw/timer/armv7m_systick.c
index a07febd1d1..7e4ddcd405 100644
--- a/hw/timer/armv7m_systick.c
+++ b/hw/timer/armv7m_systick.c
@@ -285,7 +285,7 @@ static const VMStateDescription vmstate_systick = {
     }
 };
 
-static void systick_class_init(ObjectClass *klass, void *data)
+static void systick_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/aspeed_timer.c b/hw/timer/aspeed_timer.c
index ecda49574e..57db03512f 100644
--- a/hw/timer/aspeed_timer.c
+++ b/hw/timer/aspeed_timer.c
@@ -895,7 +895,7 @@ static const Property aspeed_timer_properties[] = {
                      AspeedSCUState *),
 };
 
-static void timer_class_init(ObjectClass *klass, void *data)
+static void timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -915,7 +915,7 @@ static const TypeInfo aspeed_timer_info = {
     .abstract   = true,
 };
 
-static void aspeed_2400_timer_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedTimerClass *awc = ASPEED_TIMER_CLASS(klass);
@@ -931,7 +931,7 @@ static const TypeInfo aspeed_2400_timer_info = {
     .class_init = aspeed_2400_timer_class_init,
 };
 
-static void aspeed_2500_timer_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedTimerClass *awc = ASPEED_TIMER_CLASS(klass);
@@ -947,7 +947,7 @@ static const TypeInfo aspeed_2500_timer_info = {
     .class_init = aspeed_2500_timer_class_init,
 };
 
-static void aspeed_2600_timer_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedTimerClass *awc = ASPEED_TIMER_CLASS(klass);
@@ -963,7 +963,7 @@ static const TypeInfo aspeed_2600_timer_info = {
     .class_init = aspeed_2600_timer_class_init,
 };
 
-static void aspeed_1030_timer_class_init(ObjectClass *klass, void *data)
+static void aspeed_1030_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedTimerClass *awc = ASPEED_TIMER_CLASS(klass);
@@ -979,7 +979,7 @@ static const TypeInfo aspeed_1030_timer_info = {
     .class_init = aspeed_1030_timer_class_init,
 };
 
-static void aspeed_2700_timer_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedTimerClass *awc = ASPEED_TIMER_CLASS(klass);
diff --git a/hw/timer/avr_timer16.c b/hw/timer/avr_timer16.c
index 96baf9cf60..012d829001 100644
--- a/hw/timer/avr_timer16.c
+++ b/hw/timer/avr_timer16.c
@@ -595,7 +595,7 @@ static void avr_timer16_realize(DeviceState *dev, Error **errp)
     s->enabled = true;
 }
 
-static void avr_timer16_class_init(ObjectClass *klass, void *data)
+static void avr_timer16_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/bcm2835_systmr.c b/hw/timer/bcm2835_systmr.c
index 2f0fee3342..7929aaa882 100644
--- a/hw/timer/bcm2835_systmr.c
+++ b/hw/timer/bcm2835_systmr.c
@@ -154,7 +154,7 @@ static const VMStateDescription bcm2835_systmr_vmstate = {
     }
 };
 
-static void bcm2835_systmr_class_init(ObjectClass *klass, void *data)
+static void bcm2835_systmr_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/cadence_ttc.c b/hw/timer/cadence_ttc.c
index 54dbd4c564..9c7ba16876 100644
--- a/hw/timer/cadence_ttc.c
+++ b/hw/timer/cadence_ttc.c
@@ -451,7 +451,7 @@ static const VMStateDescription vmstate_cadence_ttc = {
     }
 };
 
-static void cadence_ttc_class_init(ObjectClass *klass, void *data)
+static void cadence_ttc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/cmsdk-apb-dualtimer.c b/hw/timer/cmsdk-apb-dualtimer.c
index 2ecd8dfe3c..34c550a3f9 100644
--- a/hw/timer/cmsdk-apb-dualtimer.c
+++ b/hw/timer/cmsdk-apb-dualtimer.c
@@ -534,7 +534,7 @@ static const VMStateDescription cmsdk_apb_dualtimer_vmstate = {
     }
 };
 
-static void cmsdk_apb_dualtimer_class_init(ObjectClass *klass, void *data)
+static void cmsdk_apb_dualtimer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/cmsdk-apb-timer.c b/hw/timer/cmsdk-apb-timer.c
index 16d0b2170e..4095267b4a 100644
--- a/hw/timer/cmsdk-apb-timer.c
+++ b/hw/timer/cmsdk-apb-timer.c
@@ -261,7 +261,7 @@ static const VMStateDescription cmsdk_apb_timer_vmstate = {
     }
 };
 
-static void cmsdk_apb_timer_class_init(ObjectClass *klass, void *data)
+static void cmsdk_apb_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/digic-timer.c b/hw/timer/digic-timer.c
index 00c32978d2..355138d354 100644
--- a/hw/timer/digic-timer.c
+++ b/hw/timer/digic-timer.c
@@ -161,7 +161,7 @@ static void digic_timer_finalize(Object *obj)
     ptimer_free(s->ptimer);
 }
 
-static void digic_timer_class_init(ObjectClass *klass, void *class_data)
+static void digic_timer_class_init(ObjectClass *klass, const void *class_data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/exynos4210_mct.c b/hw/timer/exynos4210_mct.c
index 5c6e139b20..bb0f9c8b9a 100644
--- a/hw/timer/exynos4210_mct.c
+++ b/hw/timer/exynos4210_mct.c
@@ -1546,7 +1546,7 @@ static void exynos4210_mct_finalize(Object *obj)
     }
 }
 
-static void exynos4210_mct_class_init(ObjectClass *klass, void *data)
+static void exynos4210_mct_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/exynos4210_pwm.c b/hw/timer/exynos4210_pwm.c
index 703d1d2b4a..69f737a8e6 100644
--- a/hw/timer/exynos4210_pwm.c
+++ b/hw/timer/exynos4210_pwm.c
@@ -420,7 +420,7 @@ static void exynos4210_pwm_finalize(Object *obj)
     }
 }
 
-static void exynos4210_pwm_class_init(ObjectClass *klass, void *data)
+static void exynos4210_pwm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/grlib_gptimer.c b/hw/timer/grlib_gptimer.c
index f0802b6eb6..0e06fa09e9 100644
--- a/hw/timer/grlib_gptimer.c
+++ b/hw/timer/grlib_gptimer.c
@@ -409,7 +409,7 @@ static const Property grlib_gptimer_properties[] = {
     DEFINE_PROP_UINT32("nr-timers", GPTimerUnit, nr_timers, 2),
 };
 
-static void grlib_gptimer_class_init(ObjectClass *klass, void *data)
+static void grlib_gptimer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/hpet.c b/hw/timer/hpet.c
index ea82472105..d1b7bc52b7 100644
--- a/hw/timer/hpet.c
+++ b/hw/timer/hpet.c
@@ -736,7 +736,7 @@ static const Property hpet_device_properties[] = {
     DEFINE_PROP_BOOL("hpet-offset-saved", HPETState, hpet_offset_saved, true),
 };
 
-static void hpet_device_class_init(ObjectClass *klass, void *data)
+static void hpet_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/i8254.c b/hw/timer/i8254.c
index 058fc61ce9..4b25c487f7 100644
--- a/hw/timer/i8254.c
+++ b/hw/timer/i8254.c
@@ -350,7 +350,7 @@ static void pit_realizefn(DeviceState *dev, Error **errp)
     pc->parent_realize(dev, errp);
 }
 
-static void pit_class_initfn(ObjectClass *klass, void *data)
+static void pit_class_initfn(ObjectClass *klass, const void *data)
 {
     PITClass *pc = PIT_CLASS(klass);
     PITCommonClass *k = PIT_COMMON_CLASS(klass);
diff --git a/hw/timer/i8254_common.c b/hw/timer/i8254_common.c
index 29105afcc3..ad091594cd 100644
--- a/hw/timer/i8254_common.c
+++ b/hw/timer/i8254_common.c
@@ -242,7 +242,7 @@ static const Property pit_common_properties[] = {
     DEFINE_PROP_UINT32("iobase", PITCommonState, iobase,  -1),
 };
 
-static void pit_common_class_init(ObjectClass *klass, void *data)
+static void pit_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/ibex_timer.c b/hw/timer/ibex_timer.c
index 3ebc870097..c7320ef30f 100644
--- a/hw/timer/ibex_timer.c
+++ b/hw/timer/ibex_timer.c
@@ -286,7 +286,7 @@ static void ibex_timer_realize(DeviceState *dev, Error **errp)
 }
 
 
-static void ibex_timer_class_init(ObjectClass *klass, void *data)
+static void ibex_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/imx_epit.c b/hw/timer/imx_epit.c
index f40ab16697..6123321c35 100644
--- a/hw/timer/imx_epit.c
+++ b/hw/timer/imx_epit.c
@@ -427,7 +427,7 @@ static void imx_epit_dev_reset(DeviceState *dev)
     imx_epit_reset(s, true);
 }
 
-static void imx_epit_class_init(ObjectClass *klass, void *data)
+static void imx_epit_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc  = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/imx_gpt.c b/hw/timer/imx_gpt.c
index 200a89225b..8c7cbfdeac 100644
--- a/hw/timer/imx_gpt.c
+++ b/hw/timer/imx_gpt.c
@@ -518,7 +518,7 @@ static void imx_gpt_realize(DeviceState *dev, Error **errp)
     s->timer = ptimer_init(imx_gpt_timeout, s, PTIMER_POLICY_LEGACY);
 }
 
-static void imx_gpt_class_init(ObjectClass *klass, void *data)
+static void imx_gpt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/mss-timer.c b/hw/timer/mss-timer.c
index 594da64eae..2ce821178b 100644
--- a/hw/timer/mss-timer.c
+++ b/hw/timer/mss-timer.c
@@ -285,7 +285,7 @@ static const Property mss_timer_properties[] = {
                       100 * 1000000),
 };
 
-static void mss_timer_class_init(ObjectClass *klass, void *data)
+static void mss_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/npcm7xx_timer.c b/hw/timer/npcm7xx_timer.c
index c55ba02235..6a116ad54b 100644
--- a/hw/timer/npcm7xx_timer.c
+++ b/hw/timer/npcm7xx_timer.c
@@ -689,7 +689,7 @@ static const VMStateDescription vmstate_npcm7xx_timer_ctrl = {
     },
 };
 
-static void npcm7xx_timer_class_init(ObjectClass *klass, void *data)
+static void npcm7xx_timer_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/timer/nrf51_timer.c b/hw/timer/nrf51_timer.c
index 11ad8b575e..e228fdebc3 100644
--- a/hw/timer/nrf51_timer.c
+++ b/hw/timer/nrf51_timer.c
@@ -383,7 +383,7 @@ static const Property nrf51_timer_properties[] = {
     DEFINE_PROP_UINT8("id", NRF51TimerState, id, 0),
 };
 
-static void nrf51_timer_class_init(ObjectClass *klass, void *data)
+static void nrf51_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/pxa2xx_timer.c b/hw/timer/pxa2xx_timer.c
index 9e4dd0fd9f..7a94366b0f 100644
--- a/hw/timer/pxa2xx_timer.c
+++ b/hw/timer/pxa2xx_timer.c
@@ -555,7 +555,7 @@ static const Property pxa25x_timer_dev_properties[] = {
                     PXA2XX_TIMER_HAVE_TM4, false),
 };
 
-static void pxa25x_timer_dev_class_init(ObjectClass *klass, void *data)
+static void pxa25x_timer_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -570,7 +570,7 @@ static const TypeInfo pxa25x_timer_dev_info = {
     .class_init    = pxa25x_timer_dev_class_init,
 };
 
-static void pxa2xx_timer_class_init(ObjectClass *oc, void *data)
+static void pxa2xx_timer_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/timer/renesas_cmt.c b/hw/timer/renesas_cmt.c
index 93e7f58cc2..cdff7f47f1 100644
--- a/hw/timer/renesas_cmt.c
+++ b/hw/timer/renesas_cmt.c
@@ -257,7 +257,7 @@ static const Property rcmt_properties[] = {
     DEFINE_PROP_UINT64("input-freq", RCMTState, input_freq, 0),
 };
 
-static void rcmt_class_init(ObjectClass *klass, void *data)
+static void rcmt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/renesas_tmr.c b/hw/timer/renesas_tmr.c
index 884349c2cc..95707f2b8c 100644
--- a/hw/timer/renesas_tmr.c
+++ b/hw/timer/renesas_tmr.c
@@ -467,7 +467,7 @@ static const Property rtmr_properties[] = {
     DEFINE_PROP_UINT64("input-freq", RTMRState, input_freq, 0),
 };
 
-static void rtmr_class_init(ObjectClass *klass, void *data)
+static void rtmr_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/sifive_pwm.c b/hw/timer/sifive_pwm.c
index fc796e9bc3..e85e389f7a 100644
--- a/hw/timer/sifive_pwm.c
+++ b/hw/timer/sifive_pwm.c
@@ -441,7 +441,7 @@ static void sifive_pwm_realize(DeviceState *dev, Error **errp)
                   sifive_pwm_interrupt_3, s);
 }
 
-static void sifive_pwm_class_init(ObjectClass *klass, void *data)
+static void sifive_pwm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/slavio_timer.c b/hw/timer/slavio_timer.c
index 65b24e4f06..3e071fbdb4 100644
--- a/hw/timer/slavio_timer.c
+++ b/hw/timer/slavio_timer.c
@@ -424,7 +424,7 @@ static const Property slavio_timer_properties[] = {
     DEFINE_PROP_UINT32("num_cpus",  SLAVIO_TIMERState, num_cpus,  0),
 };
 
-static void slavio_timer_class_init(ObjectClass *klass, void *data)
+static void slavio_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/sse-counter.c b/hw/timer/sse-counter.c
index f17064abe3..31f77acf61 100644
--- a/hw/timer/sse-counter.c
+++ b/hw/timer/sse-counter.c
@@ -448,7 +448,7 @@ static const VMStateDescription sse_counter_vmstate = {
     }
 };
 
-static void sse_counter_class_init(ObjectClass *klass, void *data)
+static void sse_counter_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/sse-timer.c b/hw/timer/sse-timer.c
index e106739ea9..866d5eef8a 100644
--- a/hw/timer/sse-timer.c
+++ b/hw/timer/sse-timer.c
@@ -444,7 +444,7 @@ static const Property sse_timer_properties[] = {
     DEFINE_PROP_LINK("counter", SSETimer, counter, TYPE_SSE_COUNTER, SSECounter *),
 };
 
-static void sse_timer_class_init(ObjectClass *klass, void *data)
+static void sse_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/stellaris-gptm.c b/hw/timer/stellaris-gptm.c
index f28958cefc..d97b2f8309 100644
--- a/hw/timer/stellaris-gptm.c
+++ b/hw/timer/stellaris-gptm.c
@@ -308,7 +308,7 @@ static void stellaris_gptm_realize(DeviceState *dev, Error **errp)
     s->timer[1] = timer_new_ns(QEMU_CLOCK_VIRTUAL, gptm_tick, &s->opaque[1]);
 }
 
-static void stellaris_gptm_class_init(ObjectClass *klass, void *data)
+static void stellaris_gptm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/stm32f2xx_timer.c b/hw/timer/stm32f2xx_timer.c
index 4707190d6a..be844e7f5a 100644
--- a/hw/timer/stm32f2xx_timer.c
+++ b/hw/timer/stm32f2xx_timer.c
@@ -320,7 +320,7 @@ static void stm32f2xx_timer_realize(DeviceState *dev, Error **errp)
     s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, stm32f2xx_timer_interrupt, s);
 }
 
-static void stm32f2xx_timer_class_init(ObjectClass *klass, void *data)
+static void stm32f2xx_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/timer/xilinx_timer.c b/hw/timer/xilinx_timer.c
index 4620528f98..ff4a224d08 100644
--- a/hw/timer/xilinx_timer.c
+++ b/hw/timer/xilinx_timer.c
@@ -268,7 +268,7 @@ static const Property xilinx_timer_properties[] = {
     DEFINE_PROP_UINT8("one-timer-only", XpsTimerState, one_timer_only, 0),
 };
 
-static void xilinx_timer_class_init(ObjectClass *klass, void *data)
+static void xilinx_timer_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c
index b668aee97a..bc7a78f898 100644
--- a/hw/tpm/tpm_crb.c
+++ b/hw/tpm/tpm_crb.c
@@ -315,7 +315,7 @@ static void tpm_crb_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static void tpm_crb_class_init(ObjectClass *klass, void *data)
+static void tpm_crb_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     TPMIfClass *tc = TPM_IF_CLASS(klass);
@@ -337,7 +337,7 @@ static const TypeInfo tpm_crb_info = {
     .parent = TYPE_DEVICE,
     .instance_size = sizeof(CRBState),
     .class_init  = tpm_crb_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_TPM_IF },
         { }
     }
diff --git a/hw/tpm/tpm_spapr.c b/hw/tpm/tpm_spapr.c
index 9a031e1e75..ea608ba4c8 100644
--- a/hw/tpm/tpm_spapr.c
+++ b/hw/tpm/tpm_spapr.c
@@ -387,7 +387,7 @@ static void tpm_spapr_realizefn(SpaprVioDevice *dev, Error **errp)
     s->buffer = g_malloc(TPM_SPAPR_BUFFER_MAX);
 }
 
-static void tpm_spapr_class_init(ObjectClass *klass, void *data)
+static void tpm_spapr_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SpaprVioDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
@@ -414,7 +414,7 @@ static const TypeInfo tpm_spapr_info = {
     .parent        = TYPE_VIO_SPAPR_DEVICE,
     .instance_size = sizeof(SpaprTpmState),
     .class_init    = tpm_spapr_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_TPM_IF },
         { }
     }
diff --git a/hw/tpm/tpm_tis_i2c.c b/hw/tpm/tpm_tis_i2c.c
index 92d3de1ea3..5ce84dc7a4 100644
--- a/hw/tpm/tpm_tis_i2c.c
+++ b/hw/tpm/tpm_tis_i2c.c
@@ -526,7 +526,7 @@ static void tpm_tis_i2c_reset(DeviceState *dev)
     return tpm_tis_reset(s);
 }
 
-static void tpm_tis_i2c_class_init(ObjectClass *klass, void *data)
+static void tpm_tis_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
@@ -552,7 +552,7 @@ static const TypeInfo tpm_tis_i2c_info = {
     .parent        = TYPE_I2C_SLAVE,
     .instance_size = sizeof(TPMStateI2C),
     .class_init    = tpm_tis_i2c_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
         { TYPE_TPM_IF },
         { }
     }
diff --git a/hw/tpm/tpm_tis_isa.c b/hw/tpm/tpm_tis_isa.c
index 876cb02cb5..dce83057a9 100644
--- a/hw/tpm/tpm_tis_isa.c
+++ b/hw/tpm/tpm_tis_isa.c
@@ -166,7 +166,7 @@ static void build_tpm_tis_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
     aml_append(scope, dev);
 }
 
-static void tpm_tis_isa_class_init(ObjectClass *klass, void *data)
+static void tpm_tis_isa_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     TPMIfClass *tc = TPM_IF_CLASS(klass);
@@ -189,7 +189,7 @@ static const TypeInfo tpm_tis_isa_info = {
     .instance_size = sizeof(TPMStateISA),
     .instance_init = tpm_tis_isa_initfn,
     .class_init  = tpm_tis_isa_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_TPM_IF },
         { TYPE_ACPI_DEV_AML_IF },
         { }
diff --git a/hw/tpm/tpm_tis_sysbus.c b/hw/tpm/tpm_tis_sysbus.c
index 4f187690a2..2ffa85852a 100644
--- a/hw/tpm/tpm_tis_sysbus.c
+++ b/hw/tpm/tpm_tis_sysbus.c
@@ -124,7 +124,7 @@ static void tpm_tis_sysbus_realizefn(DeviceState *dev, Error **errp)
     }
 }
 
-static void tpm_tis_sysbus_class_init(ObjectClass *klass, void *data)
+static void tpm_tis_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     TPMIfClass *tc = TPM_IF_CLASS(klass);
@@ -145,7 +145,7 @@ static const TypeInfo tpm_tis_sysbus_info = {
     .instance_size = sizeof(TPMStateSysBus),
     .instance_init = tpm_tis_sysbus_initfn,
     .class_init  = tpm_tis_sysbus_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_TPM_IF },
         { }
     }
diff --git a/hw/tricore/tc27x_soc.c b/hw/tricore/tc27x_soc.c
index 81bb16d89b..f3b84980e5 100644
--- a/hw/tricore/tc27x_soc.c
+++ b/hw/tricore/tc27x_soc.c
@@ -201,14 +201,14 @@ static void tc27x_soc_init(Object *obj)
     object_initialize_child(obj, "tc27x", &s->cpu, sc->cpu_type);
 }
 
-static void tc27x_soc_class_init(ObjectClass *klass, void *data)
+static void tc27x_soc_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = tc27x_soc_realize;
 }
 
-static void tc277d_soc_class_init(ObjectClass *oc, void *data)
+static void tc277d_soc_class_init(ObjectClass *oc, const void *data)
 {
     TC27XSoCClass *sc = TC27X_SOC_CLASS(oc);
 
diff --git a/hw/tricore/triboard.c b/hw/tricore/triboard.c
index f5baa8ccbb..cb45b01d2d 100644
--- a/hw/tricore/triboard.c
+++ b/hw/tricore/triboard.c
@@ -65,7 +65,7 @@ static void triboard_machine_init(MachineState *machine)
 }
 
 static void triboard_machine_tc277d_class_init(ObjectClass *oc,
-        void *data)
+                                               const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     TriBoardMachineClass *amc = TRIBOARD_MACHINE_CLASS(oc);
diff --git a/hw/tricore/tricore_testdevice.c b/hw/tricore/tricore_testdevice.c
index d2da74e384..e8daf95298 100644
--- a/hw/tricore/tricore_testdevice.c
+++ b/hw/tricore/tricore_testdevice.c
@@ -58,7 +58,7 @@ static void tricore_testdevice_init(Object *obj)
                           "tricore_testdevice", 0x4);
 }
 
-static void tricore_testdevice_class_init(ObjectClass *klass, void *data)
+static void tricore_testdevice_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/uefi/var-service-sysbus.c b/hw/uefi/var-service-sysbus.c
index 97da8672ee..a5aa218e26 100644
--- a/hw/uefi/var-service-sysbus.c
+++ b/hw/uefi/var-service-sysbus.c
@@ -64,7 +64,7 @@ static void uefi_vars_sysbus_realize(DeviceState *dev, Error **errp)
     uefi_vars_realize(&uv->state, errp);
 }
 
-static void uefi_vars_sysbus_class_init(ObjectClass *klass, void *data)
+static void uefi_vars_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -100,7 +100,7 @@ static void uefi_vars_x64_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(sysbus, 0, hwinfo.mmio_address);
 }
 
-static void uefi_vars_x64_class_init(ObjectClass *klass, void *data)
+static void uefi_vars_x64_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/ufs/lu.c b/hw/ufs/lu.c
index 1c3794b2d4..57b307ea56 100644
--- a/hw/ufs/lu.c
+++ b/hw/ufs/lu.c
@@ -419,7 +419,7 @@ static void ufs_lu_unrealize(DeviceState *dev)
     }
 }
 
-static void ufs_lu_class_init(ObjectClass *oc, void *data)
+static void ufs_lu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/ufs/ufs.c b/hw/ufs/ufs.c
index 542f13b10e..0577747f46 100644
--- a/hw/ufs/ufs.c
+++ b/hw/ufs/ufs.c
@@ -1844,7 +1844,7 @@ static const VMStateDescription ufs_vmstate = {
     .unmigratable = 1,
 };
 
-static void ufs_class_init(ObjectClass *oc, void *data)
+static void ufs_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
@@ -1880,7 +1880,7 @@ static char *ufs_bus_get_dev_path(DeviceState *dev)
     return qdev_get_dev_path(bus->parent);
 }
 
-static void ufs_bus_class_init(ObjectClass *class, void *data)
+static void ufs_bus_class_init(ObjectClass *class, const void *data)
 {
     BusClass *bc = BUS_CLASS(class);
     bc->get_dev_path = ufs_bus_get_dev_path;
@@ -1892,7 +1892,7 @@ static const TypeInfo ufs_info = {
     .parent = TYPE_PCI_DEVICE,
     .class_init = ufs_class_init,
     .instance_size = sizeof(UfsHc),
-    .interfaces = (InterfaceInfo[]){ { INTERFACE_PCIE_DEVICE }, {} },
+    .interfaces = (const InterfaceInfo[]){ { INTERFACE_PCIE_DEVICE }, {} },
 };
 
 static const TypeInfo ufs_bus_info = {
diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index f45b82c776..8dd2ce415e 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -26,7 +26,7 @@ static const Property usb_props[] = {
     DEFINE_PROP_STRING("pcap", USBDevice, pcap_filename),
 };
 
-static void usb_bus_class_init(ObjectClass *klass, void *data)
+static void usb_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *k = BUS_CLASS(klass);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
@@ -42,7 +42,7 @@ static const TypeInfo usb_bus_info = {
     .parent = TYPE_BUS,
     .instance_size = sizeof(USBBus),
     .class_init = usb_bus_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
@@ -713,7 +713,7 @@ static void usb_device_instance_init(Object *obj)
     }
 }
 
-static void usb_device_class_init(ObjectClass *klass, void *data)
+static void usb_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->bus_type = TYPE_USB_BUS;
diff --git a/hw/usb/canokey.c b/hw/usb/canokey.c
index e2d66179e0..cbefbb5daf 100644
--- a/hw/usb/canokey.c
+++ b/hw/usb/canokey.c
@@ -300,7 +300,7 @@ static const Property canokey_properties[] = {
     DEFINE_PROP_STRING("file", CanoKeyState, file),
 };
 
-static void canokey_class_init(ObjectClass *klass, void *data)
+static void canokey_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/ccid-card-emulated.c b/hw/usb/ccid-card-emulated.c
index b1e330f21d..c21cefd82d 100644
--- a/hw/usb/ccid-card-emulated.c
+++ b/hw/usb/ccid-card-emulated.c
@@ -591,7 +591,7 @@ static const Property emulated_card_properties[] = {
     DEFINE_PROP_UINT8("debug", EmulatedState, debug, 0),
 };
 
-static void emulated_class_initfn(ObjectClass *klass, void *data)
+static void emulated_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     CCIDCardClass *cc = CCID_CARD_CLASS(klass);
diff --git a/hw/usb/ccid-card-passthru.c b/hw/usb/ccid-card-passthru.c
index bf81485f87..1eea21a733 100644
--- a/hw/usb/ccid-card-passthru.c
+++ b/hw/usb/ccid-card-passthru.c
@@ -393,7 +393,7 @@ static const Property passthru_card_properties[] = {
     DEFINE_PROP_UINT8("debug", PassthruState, debug, 0),
 };
 
-static void passthru_class_initfn(ObjectClass *klass, void *data)
+static void passthru_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     CCIDCardClass *cc = CCID_CARD_CLASS(klass);
diff --git a/hw/usb/chipidea.c b/hw/usb/chipidea.c
index b1c85404d6..250c2b3bca 100644
--- a/hw/usb/chipidea.c
+++ b/hw/usb/chipidea.c
@@ -144,7 +144,7 @@ static void chipidea_init(Object *obj)
     }
 }
 
-static void chipidea_class_init(ObjectClass *klass, void *data)
+static void chipidea_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(klass);
diff --git a/hw/usb/dev-audio.c b/hw/usb/dev-audio.c
index 40f031252a..26af709f31 100644
--- a/hw/usb/dev-audio.c
+++ b/hw/usb/dev-audio.c
@@ -997,7 +997,7 @@ static const Property usb_audio_properties[] = {
     DEFINE_PROP_BOOL("multi", USBAudioState, multi, false),
 };
 
-static void usb_audio_class_init(ObjectClass *klass, void *data)
+static void usb_audio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *k = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/dev-hid.c b/hw/usb/dev-hid.c
index accdd460e3..54d064e54e 100644
--- a/hw/usb/dev-hid.c
+++ b/hw/usb/dev-hid.c
@@ -774,7 +774,7 @@ static const VMStateDescription vmstate_usb_kbd = {
     }
 };
 
-static void usb_hid_class_initfn(ObjectClass *klass, void *data)
+static void usb_hid_class_initfn(ObjectClass *klass, const void *data)
 {
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
 
@@ -799,7 +799,7 @@ static const Property usb_tablet_properties[] = {
         DEFINE_PROP_UINT32("head", USBHIDState, head, 0),
 };
 
-static void usb_tablet_class_initfn(ObjectClass *klass, void *data)
+static void usb_tablet_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
@@ -821,7 +821,7 @@ static const Property usb_mouse_properties[] = {
         DEFINE_PROP_UINT32("usb_version", USBHIDState, usb_version, 2),
 };
 
-static void usb_mouse_class_initfn(ObjectClass *klass, void *data)
+static void usb_mouse_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
@@ -844,7 +844,7 @@ static const Property usb_keyboard_properties[] = {
         DEFINE_PROP_STRING("display", USBHIDState, display),
 };
 
-static void usb_keyboard_class_initfn(ObjectClass *klass, void *data)
+static void usb_keyboard_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/dev-hub.c b/hw/usb/dev-hub.c
index 3880e2aca8..a19350d9c4 100644
--- a/hw/usb/dev-hub.c
+++ b/hw/usb/dev-hub.c
@@ -670,7 +670,7 @@ static const Property usb_hub_properties[] = {
     DEFINE_PROP_BOOL("port-power", USBHubState, port_power, false),
 };
 
-static void usb_hub_class_initfn(ObjectClass *klass, void *data)
+static void usb_hub_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/dev-mtp.c b/hw/usb/dev-mtp.c
index 4cd14c3df4..ce45c9cd06 100644
--- a/hw/usb/dev-mtp.c
+++ b/hw/usb/dev-mtp.c
@@ -2082,7 +2082,7 @@ static const Property mtp_properties[] = {
     DEFINE_PROP_BOOL("readonly", MTPState, readonly, true),
 };
 
-static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
+static void usb_mtp_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/dev-network.c b/hw/usb/dev-network.c
index a87a0ffb95..81cc09dcac 100644
--- a/hw/usb/dev-network.c
+++ b/hw/usb/dev-network.c
@@ -1411,7 +1411,7 @@ static const Property net_properties[] = {
     DEFINE_NIC_PROPERTIES(USBNetState, conf),
 };
 
-static void usb_net_class_initfn(ObjectClass *klass, void *data)
+static void usb_net_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/dev-serial.c b/hw/usb/dev-serial.c
index 31f6cf5b31..1c116d8b0f 100644
--- a/hw/usb/dev-serial.c
+++ b/hw/usb/dev-serial.c
@@ -637,7 +637,7 @@ static const Property serial_properties[] = {
     DEFINE_PROP_BOOL("always-plugged", USBSerialState, always_plugged, false),
 };
 
-static void usb_serial_dev_class_init(ObjectClass *klass, void *data)
+static void usb_serial_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
@@ -658,7 +658,7 @@ static const TypeInfo usb_serial_dev_type_info = {
     .class_init = usb_serial_dev_class_init,
 };
 
-static void usb_serial_class_initfn(ObjectClass *klass, void *data)
+static void usb_serial_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
@@ -678,7 +678,7 @@ static const Property braille_properties[] = {
     DEFINE_PROP_CHR("chardev", USBSerialState, cs),
 };
 
-static void usb_braille_class_initfn(ObjectClass *klass, void *data)
+static void usb_braille_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/dev-smartcard-reader.c b/hw/usb/dev-smartcard-reader.c
index 84ca8c48e2..6ce7154fee 100644
--- a/hw/usb/dev-smartcard-reader.c
+++ b/hw/usb/dev-smartcard-reader.c
@@ -1433,7 +1433,7 @@ static const Property ccid_properties[] = {
     DEFINE_PROP_UINT8("debug", USBCCIDState, debug, 0),
 };
 
-static void ccid_class_initfn(ObjectClass *klass, void *data)
+static void ccid_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
@@ -1458,13 +1458,13 @@ static const TypeInfo ccid_info = {
     .parent        = TYPE_USB_DEVICE,
     .instance_size = sizeof(USBCCIDState),
     .class_init    = ccid_class_initfn,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
 };
 
-static void ccid_card_class_init(ObjectClass *klass, void *data)
+static void ccid_card_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->bus_type = TYPE_CCID_BUS;
diff --git a/hw/usb/dev-storage-bot.c b/hw/usb/dev-storage-bot.c
index 1e5c5c711f..df6ab7f656 100644
--- a/hw/usb/dev-storage-bot.c
+++ b/hw/usb/dev-storage-bot.c
@@ -40,7 +40,7 @@ static void usb_msd_bot_realize(USBDevice *dev, Error **errp)
     usb_msd_handle_reset(dev);
 }
 
-static void usb_msd_class_bot_initfn(ObjectClass *klass, void *data)
+static void usb_msd_class_bot_initfn(ObjectClass *klass, const void *data)
 {
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
 
diff --git a/hw/usb/dev-storage-classic.c b/hw/usb/dev-storage-classic.c
index 56ef39da2e..dabe156359 100644
--- a/hw/usb/dev-storage-classic.c
+++ b/hw/usb/dev-storage-classic.c
@@ -74,7 +74,7 @@ static const Property msd_properties[] = {
     DEFINE_PROP_BOOL("commandlog", MSDState, commandlog, false),
 };
 
-static void usb_msd_class_storage_initfn(ObjectClass *klass, void *data)
+static void usb_msd_class_storage_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/dev-storage.c b/hw/usb/dev-storage.c
index 4f1e8b7f6c..b13fe345c4 100644
--- a/hw/usb/dev-storage.c
+++ b/hw/usb/dev-storage.c
@@ -585,7 +585,7 @@ static const VMStateDescription vmstate_usb_msd = {
     }
 };
 
-static void usb_msd_class_initfn_common(ObjectClass *klass, void *data)
+static void usb_msd_class_initfn_common(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/dev-uas.c b/hw/usb/dev-uas.c
index b1d6b6ecc3..21cc2835c6 100644
--- a/hw/usb/dev-uas.c
+++ b/hw/usb/dev-uas.c
@@ -956,7 +956,7 @@ static const Property uas_properties[] = {
     DEFINE_PROP_UINT32("log-scsi-req", UASDevice, requestlog, 0),
 };
 
-static void usb_uas_class_initfn(ObjectClass *klass, void *data)
+static void usb_uas_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/dev-wacom.c b/hw/usb/dev-wacom.c
index 7177c17f03..f4b71a2147 100644
--- a/hw/usb/dev-wacom.c
+++ b/hw/usb/dev-wacom.c
@@ -420,7 +420,7 @@ static const VMStateDescription vmstate_usb_wacom = {
     .unmigratable = 1,
 };
 
-static void usb_wacom_class_init(ObjectClass *klass, void *data)
+static void usb_wacom_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/hcd-dwc2.c b/hw/usb/hcd-dwc2.c
index e8152719f8..83864505bb 100644
--- a/hw/usb/hcd-dwc2.c
+++ b/hw/usb/hcd-dwc2.c
@@ -1452,7 +1452,7 @@ static const Property dwc2_usb_properties[] = {
     DEFINE_PROP_UINT32("usb_version", DWC2State, usb_version, 2),
 };
 
-static void dwc2_class_init(ObjectClass *klass, void *data)
+static void dwc2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     DWC2Class *c = DWC2_USB_CLASS(klass);
diff --git a/hw/usb/hcd-dwc3.c b/hw/usb/hcd-dwc3.c
index 0bceee2712..98a342b8b8 100644
--- a/hw/usb/hcd-dwc3.c
+++ b/hw/usb/hcd-dwc3.c
@@ -666,7 +666,7 @@ static const Property usb_dwc3_properties[] = {
                        0x12345678),
 };
 
-static void usb_dwc3_class_init(ObjectClass *klass, void *data)
+static void usb_dwc3_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/usb/hcd-ehci-pci.c b/hw/usb/hcd-ehci-pci.c
index e00316721a..38ad3406b3 100644
--- a/hw/usb/hcd-ehci-pci.c
+++ b/hw/usb/hcd-ehci-pci.c
@@ -150,7 +150,7 @@ static const VMStateDescription vmstate_ehci_pci = {
     }
 };
 
-static void ehci_class_init(ObjectClass *klass, void *data)
+static void ehci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -172,13 +172,13 @@ static const TypeInfo ehci_pci_type_info = {
     .instance_finalize = usb_ehci_pci_finalize,
     .abstract = true,
     .class_init = ehci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-static void ehci_data_class_init(ObjectClass *klass, void *data)
+static void ehci_data_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/usb/hcd-ehci-sysbus.c b/hw/usb/hcd-ehci-sysbus.c
index 768c3dd797..0449f5fa6d 100644
--- a/hw/usb/hcd-ehci-sysbus.c
+++ b/hw/usb/hcd-ehci-sysbus.c
@@ -80,7 +80,7 @@ static void ehci_sysbus_finalize(Object *obj)
     usb_ehci_finalize(s);
 }
 
-static void ehci_sysbus_class_init(ObjectClass *klass, void *data)
+static void ehci_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(klass);
@@ -95,7 +95,7 @@ static void ehci_sysbus_class_init(ObjectClass *klass, void *data)
     set_bit(DEVICE_CATEGORY_USB, dc->categories);
 }
 
-static void ehci_platform_class_init(ObjectClass *oc, void *data)
+static void ehci_platform_class_init(ObjectClass *oc, const void *data)
 {
     SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -105,7 +105,7 @@ static void ehci_platform_class_init(ObjectClass *oc, void *data)
     set_bit(DEVICE_CATEGORY_USB, dc->categories);
 }
 
-static void ehci_exynos4210_class_init(ObjectClass *oc, void *data)
+static void ehci_exynos4210_class_init(ObjectClass *oc, const void *data)
 {
     SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -115,7 +115,7 @@ static void ehci_exynos4210_class_init(ObjectClass *oc, void *data)
     set_bit(DEVICE_CATEGORY_USB, dc->categories);
 }
 
-static void ehci_aw_h3_class_init(ObjectClass *oc, void *data)
+static void ehci_aw_h3_class_init(ObjectClass *oc, const void *data)
 {
     SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -125,7 +125,7 @@ static void ehci_aw_h3_class_init(ObjectClass *oc, void *data)
     set_bit(DEVICE_CATEGORY_USB, dc->categories);
 }
 
-static void ehci_npcm7xx_class_init(ObjectClass *oc, void *data)
+static void ehci_npcm7xx_class_init(ObjectClass *oc, const void *data)
 {
     SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -137,7 +137,7 @@ static void ehci_npcm7xx_class_init(ObjectClass *oc, void *data)
     set_bit(DEVICE_CATEGORY_USB, dc->categories);
 }
 
-static void ehci_tegra2_class_init(ObjectClass *oc, void *data)
+static void ehci_tegra2_class_init(ObjectClass *oc, const void *data)
 {
     SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -154,7 +154,7 @@ static void ehci_ppc4xx_init(Object *o)
     s->ehci.companion_enable = true;
 }
 
-static void ehci_ppc4xx_class_init(ObjectClass *oc, void *data)
+static void ehci_ppc4xx_class_init(ObjectClass *oc, const void *data)
 {
     SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -220,7 +220,7 @@ static void fusbh200_ehci_init(Object *obj)
                                 &f->mem_vendor);
 }
 
-static void fusbh200_ehci_class_init(ObjectClass *oc, void *data)
+static void fusbh200_ehci_class_init(ObjectClass *oc, const void *data)
 {
     SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
diff --git a/hw/usb/hcd-ohci-pci.c b/hw/usb/hcd-ohci-pci.c
index b3684a2ef6..94d1077eb9 100644
--- a/hw/usb/hcd-ohci-pci.c
+++ b/hw/usb/hcd-ohci-pci.c
@@ -126,7 +126,7 @@ static const VMStateDescription vmstate_ohci = {
     }
 };
 
-static void ohci_pci_class_init(ObjectClass *klass, void *data)
+static void ohci_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -149,7 +149,7 @@ static const TypeInfo ohci_pci_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(OHCIPCIState),
     .class_init    = ohci_pci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/usb/hcd-ohci-sysbus.c b/hw/usb/hcd-ohci-sysbus.c
index 15311949b3..3fc6cce44b 100644
--- a/hw/usb/hcd-ohci-sysbus.c
+++ b/hw/usb/hcd-ohci-sysbus.c
@@ -64,7 +64,7 @@ static const Property ohci_sysbus_properties[] = {
     DEFINE_PROP_DMAADDR("dma-offset", OHCISysBusState, dma_offset, 0),
 };
 
-static void ohci_sysbus_class_init(ObjectClass *klass, void *data)
+static void ohci_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/usb/hcd-uhci.c b/hw/usb/hcd-uhci.c
index 0561a6d801..4822c704f6 100644
--- a/hw/usb/hcd-uhci.c
+++ b/hw/usb/hcd-uhci.c
@@ -1260,7 +1260,7 @@ static const Property uhci_properties_standalone[] = {
     DEFINE_PROP_UINT32("maxframes", UHCIState, maxframes, 128),
 };
 
-static void uhci_class_init(ObjectClass *klass, void *data)
+static void uhci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1278,13 +1278,13 @@ static const TypeInfo uhci_pci_type_info = {
     .class_size    = sizeof(UHCIPCIDeviceClass),
     .abstract = true,
     .class_init = uhci_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };
 
-void uhci_data_class_init(ObjectClass *klass, void *data)
+void uhci_data_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/usb/hcd-uhci.h b/hw/usb/hcd-uhci.h
index d4664297cf..e0a6525505 100644
--- a/hw/usb/hcd-uhci.h
+++ b/hw/usb/hcd-uhci.h
@@ -88,7 +88,7 @@ typedef struct UHCIInfo {
     bool       notuser; /* disallow user_creatable */
 } UHCIInfo;
 
-void uhci_data_class_init(ObjectClass *klass, void *data);
+void uhci_data_class_init(ObjectClass *klass, const void *data);
 void usb_uhci_common_realize(PCIDevice *dev, Error **errp);
 
 #define TYPE_PIIX3_USB_UHCI "piix3-usb-uhci"
diff --git a/hw/usb/hcd-xhci-nec.c b/hw/usb/hcd-xhci-nec.c
index 1df518baf5..9e0fea26f4 100644
--- a/hw/usb/hcd-xhci-nec.c
+++ b/hw/usb/hcd-xhci-nec.c
@@ -50,7 +50,7 @@ static void nec_xhci_instance_init(Object *obj)
     pci->xhci.numslots = nec->slots;
 }
 
-static void nec_xhci_class_init(ObjectClass *klass, void *data)
+static void nec_xhci_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/usb/hcd-xhci-pci.c b/hw/usb/hcd-xhci-pci.c
index d908eb787d..b93c80b09d 100644
--- a/hw/usb/hcd-xhci-pci.c
+++ b/hw/usb/hcd-xhci-pci.c
@@ -223,7 +223,7 @@ static const Property xhci_pci_properties[] = {
                      conditional_intr_mapping, false),
 };
 
-static void xhci_class_init(ObjectClass *klass, void *data)
+static void xhci_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -248,14 +248,14 @@ static const TypeInfo xhci_pci_info = {
     .class_init    = xhci_class_init,
     .instance_init = xhci_instance_init,
     .abstract      = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
     },
 };
 
-static void qemu_xhci_class_init(ObjectClass *klass, void *data)
+static void qemu_xhci_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 
diff --git a/hw/usb/hcd-xhci-sysbus.c b/hw/usb/hcd-xhci-sysbus.c
index ce43322396..244698e5f2 100644
--- a/hw/usb/hcd-xhci-sysbus.c
+++ b/hw/usb/hcd-xhci-sysbus.c
@@ -96,7 +96,7 @@ static const VMStateDescription vmstate_xhci_sysbus = {
     }
 };
 
-static void xhci_sysbus_class_init(ObjectClass *klass, void *data)
+static void xhci_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 64c3a23b9b..292c378bfc 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -1187,6 +1187,12 @@ static void xhci_ep_free_xfer(XHCITransfer *xfer)
     g_free(xfer);
 }
 
+static void xhci_xfer_unmap(XHCITransfer *xfer)
+{
+    usb_packet_unmap(&xfer->packet, &xfer->sgl);
+    qemu_sglist_destroy(&xfer->sgl);
+}
+
 static int xhci_ep_nuke_one_xfer(XHCITransfer *t, TRBCCode report)
 {
     int killed = 0;
@@ -1198,6 +1204,7 @@ static int xhci_ep_nuke_one_xfer(XHCITransfer *t, TRBCCode report)
 
     if (t->running_async) {
         usb_cancel_packet(&t->packet);
+        xhci_xfer_unmap(t);
         t->running_async = 0;
         killed = 1;
     }
@@ -1480,12 +1487,6 @@ err:
     return -1;
 }
 
-static void xhci_xfer_unmap(XHCITransfer *xfer)
-{
-    usb_packet_unmap(&xfer->packet, &xfer->sgl);
-    qemu_sglist_destroy(&xfer->sgl);
-}
-
 static void xhci_xfer_report(XHCITransfer *xfer)
 {
     uint32_t edtla = 0;
@@ -3638,7 +3639,7 @@ static const Property xhci_properties[] = {
                      DeviceState *),
 };
 
-static void xhci_class_init(ObjectClass *klass, void *data)
+static void xhci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
index c3d642c9d3..b74670ae25 100644
--- a/hw/usb/host-libusb.c
+++ b/hw/usb/host-libusb.c
@@ -1781,7 +1781,7 @@ static const Property usb_host_dev_properties[] = {
                      suppress_remote_wake, true),
 };
 
-static void usb_host_class_initfn(ObjectClass *klass, void *data)
+static void usb_host_class_initfn(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/imx-usb-phy.c b/hw/usb/imx-usb-phy.c
index f519250567..c25566d0fa 100644
--- a/hw/usb/imx-usb-phy.c
+++ b/hw/usb/imx-usb-phy.c
@@ -214,7 +214,7 @@ static void imx_usbphy_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
 }
 
-static void imx_usbphy_class_init(ObjectClass *klass, void *data)
+static void imx_usbphy_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index f3a83b3f4c..f516ff42a1 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -2582,7 +2582,7 @@ static const Property usbredir_properties[] = {
                      suppress_remote_wake, true),
 };
 
-static void usbredir_class_initfn(ObjectClass *klass, void *data)
+static void usbredir_class_initfn(ObjectClass *klass, const void *data)
 {
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/usb/u2f-emulated.c b/hw/usb/u2f-emulated.c
index e1dd19ee92..ace5eceadd 100644
--- a/hw/usb/u2f-emulated.c
+++ b/hw/usb/u2f-emulated.c
@@ -377,7 +377,7 @@ static const Property u2f_emulated_properties[] = {
     DEFINE_PROP_STRING("counter", U2FEmulatedState, counter),
 };
 
-static void u2f_emulated_class_init(ObjectClass *klass, void *data)
+static void u2f_emulated_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     U2FKeyClass *kc = U2F_KEY_CLASS(klass);
diff --git a/hw/usb/u2f-passthru.c b/hw/usb/u2f-passthru.c
index 8df5215a1f..fa8d9cdda8 100644
--- a/hw/usb/u2f-passthru.c
+++ b/hw/usb/u2f-passthru.c
@@ -520,7 +520,7 @@ static const Property u2f_passthru_properties[] = {
     DEFINE_PROP_STRING("hidraw", U2FPassthruState, hidraw),
 };
 
-static void u2f_passthru_class_init(ObjectClass *klass, void *data)
+static void u2f_passthru_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     U2FKeyClass *kc = U2F_KEY_CLASS(klass);
diff --git a/hw/usb/u2f.c b/hw/usb/u2f.c
index 1fb59cf404..b051a999d3 100644
--- a/hw/usb/u2f.c
+++ b/hw/usb/u2f.c
@@ -317,7 +317,7 @@ const VMStateDescription vmstate_u2f_key = {
     }
 };
 
-static void u2f_key_class_init(ObjectClass *klass, void *data)
+static void u2f_key_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
diff --git a/hw/usb/xlnx-usb-subsystem.c b/hw/usb/xlnx-usb-subsystem.c
index d8deeb6ced..98967ef49f 100644
--- a/hw/usb/xlnx-usb-subsystem.c
+++ b/hw/usb/xlnx-usb-subsystem.c
@@ -69,7 +69,7 @@ static void versal_usb2_init(Object *obj)
     object_property_add_alias(obj, "dma", OBJECT(&s->dwc3.sysbus_xhci), "dma");
 }
 
-static void versal_usb2_class_init(ObjectClass *klass, void *data)
+static void versal_usb2_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/usb/xlnx-versal-usb2-ctrl-regs.c b/hw/usb/xlnx-versal-usb2-ctrl-regs.c
index 66c793a602..4114672d4f 100644
--- a/hw/usb/xlnx-versal-usb2-ctrl-regs.c
+++ b/hw/usb/xlnx-versal-usb2-ctrl-regs.c
@@ -202,7 +202,7 @@ static const VMStateDescription vmstate_usb2_ctrl_regs = {
     }
 };
 
-static void usb2_ctrl_regs_class_init(ObjectClass *klass, void *data)
+static void usb2_ctrl_regs_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/vfio/amd-xgbe.c b/hw/vfio/amd-xgbe.c
index 5927503b5c..58f590e385 100644
--- a/hw/vfio/amd-xgbe.c
+++ b/hw/vfio/amd-xgbe.c
@@ -34,7 +34,7 @@ static const VMStateDescription vfio_platform_amd_xgbe_vmstate = {
     .unmigratable = 1,
 };
 
-static void vfio_amd_xgbe_class_init(ObjectClass *klass, void *data)
+static void vfio_amd_xgbe_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VFIOAmdXgbeDeviceClass *vcxc =
diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
index be2e2927c2..1207c08d8d 100644
--- a/hw/vfio/ap.c
+++ b/hw/vfio/ap.c
@@ -241,7 +241,7 @@ static void vfio_ap_set_fd(Object *obj, const char *str, Error **errp)
 }
 #endif
 
-static void vfio_ap_class_init(ObjectClass *klass, void *data)
+static void vfio_ap_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/vfio/calxeda-xgmac.c b/hw/vfio/calxeda-xgmac.c
index a5ef262def..03f2ff5763 100644
--- a/hw/vfio/calxeda-xgmac.c
+++ b/hw/vfio/calxeda-xgmac.c
@@ -34,7 +34,7 @@ static const VMStateDescription vfio_platform_calxeda_xgmac_vmstate = {
     .unmigratable = 1,
 };
 
-static void vfio_calxeda_xgmac_class_init(ObjectClass *klass, void *data)
+static void vfio_calxeda_xgmac_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VFIOCalxedaXgmacDeviceClass *vcxc =
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 3a91efce81..fde0c3fbef 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -689,7 +689,7 @@ static void vfio_ccw_set_fd(Object *obj, const char *str, Error **errp)
 }
 #endif
 
-static void vfio_ccw_class_init(ObjectClass *klass, void *data)
+static void vfio_ccw_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     S390CCWDeviceClass *cdc = S390_CCW_DEVICE_CLASS(klass);
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index 29170f0634..77ff56b43f 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -1099,7 +1099,7 @@ out_single:
     return ret;
 }
 
-static void vfio_iommu_legacy_class_init(ObjectClass *klass, void *data)
+static void vfio_iommu_legacy_class_init(ObjectClass *klass, const void *data)
 {
     VFIOIOMMUClass *vioc = VFIO_IOMMU_CLASS(klass);
 
@@ -1161,7 +1161,7 @@ static void vfio_iommu_legacy_instance_init(Object *obj)
     QLIST_INIT(&container->group_list);
 }
 
-static void hiod_legacy_vfio_class_init(ObjectClass *oc, void *data)
+static void hiod_legacy_vfio_class_init(ObjectClass *oc, const void *data)
 {
     HostIOMMUDeviceClass *hioc = HOST_IOMMU_DEVICE_CLASS(oc);
 
diff --git a/hw/vfio/igd.c b/hw/vfio/igd.c
index 6678e0e5cd..d7e4728fdc 100644
--- a/hw/vfio/igd.c
+++ b/hw/vfio/igd.c
@@ -301,7 +301,8 @@ static void vfio_pci_igd_lpc_bridge_realize(PCIDevice *pdev, Error **errp)
     }
 }
 
-static void vfio_pci_igd_lpc_bridge_class_init(ObjectClass *klass, void *data)
+static void vfio_pci_igd_lpc_bridge_class_init(ObjectClass *klass,
+                                               const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -317,7 +318,7 @@ static const TypeInfo vfio_pci_igd_lpc_bridge_info = {
     .name = "vfio-pci-igd-lpc-bridge",
     .parent = TYPE_PCI_DEVICE,
     .class_init = vfio_pci_igd_lpc_bridge_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index b2f72dc8c3..232c06dd15 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -789,7 +789,7 @@ out_single:
     return ret;
 }
 
-static void vfio_iommu_iommufd_class_init(ObjectClass *klass, void *data)
+static void vfio_iommu_iommufd_class_init(ObjectClass *klass, const void *data)
 {
     VFIOIOMMUClass *vioc = VFIO_IOMMU_CLASS(klass);
 
@@ -847,7 +847,7 @@ hiod_iommufd_vfio_get_page_size_mask(HostIOMMUDevice *hiod)
 }
 
 
-static void hiod_iommufd_vfio_class_init(ObjectClass *oc, void *data)
+static void hiod_iommufd_vfio_class_init(ObjectClass *oc, const void *data)
 {
     HostIOMMUDeviceClass *hiodc = HOST_IOMMU_DEVICE_CLASS(oc);
 
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 4a9484dfbe..6908bcc0d3 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3436,7 +3436,7 @@ static void vfio_pci_set_fd(Object *obj, const char *str, Error **errp)
 }
 #endif
 
-static void vfio_pci_dev_class_init(ObjectClass *klass, void *data)
+static void vfio_pci_dev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
@@ -3581,7 +3581,7 @@ static const TypeInfo vfio_pci_dev_info = {
     .class_init = vfio_pci_dev_class_init,
     .instance_init = vfio_instance_init,
     .instance_finalize = vfio_instance_finalize,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { }
@@ -3594,7 +3594,8 @@ static const Property vfio_pci_dev_nohotplug_properties[] = {
                             ON_OFF_AUTO_AUTO),
 };
 
-static void vfio_pci_nohotplug_dev_class_init(ObjectClass *klass, void *data)
+static void vfio_pci_nohotplug_dev_class_init(ObjectClass *klass,
+                                              const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c
index 49cd9816c3..ffb3681607 100644
--- a/hw/vfio/platform.c
+++ b/hw/vfio/platform.c
@@ -659,7 +659,7 @@ static void vfio_platform_set_fd(Object *obj, const char *str, Error **errp)
 }
 #endif
 
-static void vfio_platform_class_init(ObjectClass *klass, void *data)
+static void vfio_platform_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
diff --git a/hw/vfio/spapr.c b/hw/vfio/spapr.c
index 95ccbad418..564b70ef97 100644
--- a/hw/vfio/spapr.c
+++ b/hw/vfio/spapr.c
@@ -559,7 +559,7 @@ listener_unregister_exit:
     return false;
 }
 
-static void vfio_iommu_spapr_class_init(ObjectClass *klass, void *data)
+static void vfio_iommu_spapr_class_init(ObjectClass *klass, const void *data)
 {
     VFIOIOMMUClass *vioc = VFIO_IOMMU_CLASS(klass);
 
diff --git a/hw/virtio/vdpa-dev-pci.c b/hw/virtio/vdpa-dev-pci.c
index 787926801a..3068112146 100644
--- a/hw/virtio/vdpa-dev-pci.c
+++ b/hw/virtio/vdpa-dev-pci.c
@@ -70,7 +70,8 @@ vhost_vdpa_device_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(DEVICE(&dev->vdev), BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_vdpa_device_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_vdpa_device_pci_class_init(ObjectClass *klass,
+                                             const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vdpa-dev.c b/hw/virtio/vdpa-dev.c
index a7e73b1c99..dd8837ce4e 100644
--- a/hw/virtio/vdpa-dev.c
+++ b/hw/virtio/vdpa-dev.c
@@ -353,7 +353,7 @@ static const VMStateDescription vmstate_vhost_vdpa_device = {
     },
 };
 
-static void vhost_vdpa_device_class_init(ObjectClass *klass, void *data)
+static void vhost_vdpa_device_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/vhost-scsi-pci.c b/hw/virtio/vhost-scsi-pci.c
index 3778f6131e..7399acef8e 100644
--- a/hw/virtio/vhost-scsi-pci.c
+++ b/hw/virtio/vhost-scsi-pci.c
@@ -61,7 +61,7 @@ static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_scsi_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-base.c b/hw/virtio/vhost-user-base.c
index 2bc3423326..77143320a2 100644
--- a/hw/virtio/vhost-user-base.c
+++ b/hw/virtio/vhost-user-base.c
@@ -348,7 +348,7 @@ static void vub_device_unrealize(DeviceState *dev)
     do_vhost_user_cleanup(vdev, vub);
 }
 
-static void vub_class_init(ObjectClass *klass, void *data)
+static void vub_class_init(ObjectClass *klass, const void *data)
 {
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 
diff --git a/hw/virtio/vhost-user-blk-pci.c b/hw/virtio/vhost-user-blk-pci.c
index 1767ef2c9c..904369f5a3 100644
--- a/hw/virtio/vhost-user-blk-pci.c
+++ b/hw/virtio/vhost-user-blk-pci.c
@@ -65,7 +65,7 @@ static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_blk_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-device-pci.c b/hw/virtio/vhost-user-device-pci.c
index efaf55d3dd..f10bac874e 100644
--- a/hw/virtio/vhost-user-device-pci.c
+++ b/hw/virtio/vhost-user-device-pci.c
@@ -31,7 +31,8 @@ static void vhost_user_device_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_device_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_device_pci_class_init(ObjectClass *klass,
+                                             const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-device.c b/hw/virtio/vhost-user-device.c
index 86eba138b4..3939bdf755 100644
--- a/hw/virtio/vhost-user-device.c
+++ b/hw/virtio/vhost-user-device.c
@@ -37,7 +37,7 @@ static const Property vud_properties[] = {
     DEFINE_PROP_UINT32("config_size", VHostUserBase, config_size, 0),
 };
 
-static void vud_class_init(ObjectClass *klass, void *data)
+static void vud_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/virtio/vhost-user-fs-pci.c b/hw/virtio/vhost-user-fs-pci.c
index 116eaab907..1490c118bc 100644
--- a/hw/virtio/vhost-user-fs-pci.c
+++ b/hw/virtio/vhost-user-fs-pci.c
@@ -47,7 +47,7 @@ static void vhost_user_fs_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_fs_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_fs_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-fs.c b/hw/virtio/vhost-user-fs.c
index 0e8d4b3823..f6d1fc8804 100644
--- a/hw/virtio/vhost-user-fs.c
+++ b/hw/virtio/vhost-user-fs.c
@@ -418,7 +418,7 @@ static void vuf_instance_init(Object *obj)
                                   "/filesystem@0", DEVICE(obj));
 }
 
-static void vuf_class_init(ObjectClass *klass, void *data)
+static void vuf_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/vhost-user-gpio-pci.c b/hw/virtio/vhost-user-gpio-pci.c
index b3028a24a1..9b165b54f8 100644
--- a/hw/virtio/vhost-user-gpio-pci.c
+++ b/hw/virtio/vhost-user-gpio-pci.c
@@ -32,7 +32,7 @@ static void vhost_user_gpio_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_gpio_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_gpio_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-gpio.c b/hw/virtio/vhost-user-gpio.c
index 4a08814904..a7fd49b10a 100644
--- a/hw/virtio/vhost-user-gpio.c
+++ b/hw/virtio/vhost-user-gpio.c
@@ -36,7 +36,7 @@ static const VMStateDescription vu_gpio_vmstate = {
     .unmigratable = 1,
 };
 
-static void vu_gpio_class_init(ObjectClass *klass, void *data)
+static void vu_gpio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
diff --git a/hw/virtio/vhost-user-i2c-pci.c b/hw/virtio/vhost-user-i2c-pci.c
index 00ac10941f..692cd66fde 100644
--- a/hw/virtio/vhost-user-i2c-pci.c
+++ b/hw/virtio/vhost-user-i2c-pci.c
@@ -32,7 +32,7 @@ static void vhost_user_i2c_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_i2c_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_i2c_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c
index 1c7cde503c..ae007fe97d 100644
--- a/hw/virtio/vhost-user-i2c.c
+++ b/hw/virtio/vhost-user-i2c.c
@@ -36,7 +36,7 @@ static const VMStateDescription vu_i2c_vmstate = {
     .unmigratable = 1,
 };
 
-static void vu_i2c_class_init(ObjectClass *klass, void *data)
+static void vu_i2c_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
diff --git a/hw/virtio/vhost-user-input.c b/hw/virtio/vhost-user-input.c
index 917405329f..5cfc5bbb56 100644
--- a/hw/virtio/vhost-user-input.c
+++ b/hw/virtio/vhost-user-input.c
@@ -30,7 +30,7 @@ static const VMStateDescription vmstate_vhost_input = {
     .unmigratable = 1,
 };
 
-static void vhost_input_class_init(ObjectClass *klass, void *data)
+static void vhost_input_class_init(ObjectClass *klass, const void *data)
 {
     VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/virtio/vhost-user-rng-pci.c b/hw/virtio/vhost-user-rng-pci.c
index a4e690148d..9f45fc6f35 100644
--- a/hw/virtio/vhost-user-rng-pci.c
+++ b/hw/virtio/vhost-user-rng-pci.c
@@ -40,7 +40,7 @@ static void vhost_user_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_rng_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_rng_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-rng.c b/hw/virtio/vhost-user-rng.c
index 5aa432e5e1..61dadcda05 100644
--- a/hw/virtio/vhost-user-rng.c
+++ b/hw/virtio/vhost-user-rng.c
@@ -37,7 +37,7 @@ static void vu_rng_base_realize(DeviceState *dev, Error **errp)
     vubs->parent_realize(dev, errp);
 }
 
-static void vu_rng_class_init(ObjectClass *klass, void *data)
+static void vu_rng_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
diff --git a/hw/virtio/vhost-user-scmi-pci.c b/hw/virtio/vhost-user-scmi-pci.c
index 7f53af7fce..0ab56a50bb 100644
--- a/hw/virtio/vhost-user-scmi-pci.c
+++ b/hw/virtio/vhost-user-scmi-pci.c
@@ -31,7 +31,7 @@ static void vhost_user_scmi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_scmi_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_scmi_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-scmi.c b/hw/virtio/vhost-user-scmi.c
index 04cd36dd2e..7a0f622181 100644
--- a/hw/virtio/vhost-user-scmi.c
+++ b/hw/virtio/vhost-user-scmi.c
@@ -279,7 +279,7 @@ static const Property vu_scmi_properties[] = {
     DEFINE_PROP_CHR("chardev", VHostUserSCMI, chardev),
 };
 
-static void vu_scmi_class_init(ObjectClass *klass, void *data)
+static void vu_scmi_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/vhost-user-scsi-pci.c b/hw/virtio/vhost-user-scsi-pci.c
index 4a4128d961..994e51a37b 100644
--- a/hw/virtio/vhost-user-scsi-pci.c
+++ b/hw/virtio/vhost-user-scsi-pci.c
@@ -67,7 +67,7 @@ static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_scsi_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-snd-pci.c b/hw/virtio/vhost-user-snd-pci.c
index 0cb86b7d85..f5015fb6c4 100644
--- a/hw/virtio/vhost-user-snd-pci.c
+++ b/hw/virtio/vhost-user-snd-pci.c
@@ -33,7 +33,7 @@ static void vhost_user_snd_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_snd_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_snd_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-snd.c b/hw/virtio/vhost-user-snd.c
index b414c75c06..732411c655 100644
--- a/hw/virtio/vhost-user-snd.c
+++ b/hw/virtio/vhost-user-snd.c
@@ -54,7 +54,7 @@ static void vu_snd_base_realize(DeviceState *dev, Error **errp)
     vubs->parent_realize(dev, errp);
 }
 
-static void vu_snd_class_init(ObjectClass *klass, void *data)
+static void vu_snd_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
diff --git a/hw/virtio/vhost-user-vsock-pci.c b/hw/virtio/vhost-user-vsock-pci.c
index f730a05e78..adb877b6e0 100644
--- a/hw/virtio/vhost-user-vsock-pci.c
+++ b/hw/virtio/vhost-user-vsock-pci.c
@@ -46,7 +46,8 @@ static void vhost_user_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_user_vsock_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_user_vsock_pci_class_init(ObjectClass *klass,
+                                            const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-user-vsock.c b/hw/virtio/vhost-user-vsock.c
index d21cd4b516..2776792f59 100644
--- a/hw/virtio/vhost-user-vsock.c
+++ b/hw/virtio/vhost-user-vsock.c
@@ -151,7 +151,7 @@ static const Property vuv_properties[] = {
     DEFINE_PROP_CHR("chardev", VHostUserVSock, conf.chardev),
 };
 
-static void vuv_class_init(ObjectClass *klass, void *data)
+static void vuv_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/vhost-vsock-common.c b/hw/virtio/vhost-vsock-common.c
index 9ac587d20c..4b4fbb45cc 100644
--- a/hw/virtio/vhost-vsock-common.c
+++ b/hw/virtio/vhost-vsock-common.c
@@ -290,7 +290,7 @@ static const Property vhost_vsock_common_properties[] = {
                             ON_OFF_AUTO_AUTO),
 };
 
-static void vhost_vsock_common_class_init(ObjectClass *klass, void *data)
+static void vhost_vsock_common_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/vhost-vsock-pci.c b/hw/virtio/vhost-vsock-pci.c
index 6c618ee908..0022a713d4 100644
--- a/hw/virtio/vhost-vsock-pci.c
+++ b/hw/virtio/vhost-vsock-pci.c
@@ -56,7 +56,7 @@ static void vhost_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void vhost_vsock_pci_class_init(ObjectClass *klass, void *data)
+static void vhost_vsock_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/vhost-vsock.c b/hw/virtio/vhost-vsock.c
index 940b30fa27..b73dc723c2 100644
--- a/hw/virtio/vhost-vsock.c
+++ b/hw/virtio/vhost-vsock.c
@@ -210,7 +210,7 @@ static const Property vhost_vsock_properties[] = {
     DEFINE_PROP_STRING("vhostfd", VHostVSock, conf.vhostfd),
 };
 
-static void vhost_vsock_class_init(ObjectClass *klass, void *data)
+static void vhost_vsock_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/virtio-9p-pci.c b/hw/virtio/virtio-9p-pci.c
index aa1dce8f28..594742ff65 100644
--- a/hw/virtio/virtio-9p-pci.c
+++ b/hw/virtio/virtio-9p-pci.c
@@ -49,7 +49,7 @@ static const Property virtio_9p_pci_properties[] = {
     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 };
 
-static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_9p_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/virtio/virtio-balloon-pci.c b/hw/virtio/virtio-balloon-pci.c
index db7e1cb475..96e88b6b86 100644
--- a/hw/virtio/virtio-balloon-pci.c
+++ b/hw/virtio/virtio-balloon-pci.c
@@ -55,7 +55,7 @@ static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_balloon_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 0d0603c674..91510ec2e2 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -1058,7 +1058,7 @@ static const Property virtio_balloon_properties[] = {
                      IOThread *),
 };
 
-static void virtio_balloon_class_init(ObjectClass *klass, void *data)
+static void virtio_balloon_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/virtio-blk-pci.c b/hw/virtio/virtio-blk-pci.c
index fc06cec656..fd33bbd7e8 100644
--- a/hw/virtio/virtio-blk-pci.c
+++ b/hw/virtio/virtio-blk-pci.c
@@ -63,7 +63,7 @@ static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_blk_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c
index d1c79c567b..11adfbf3ab 100644
--- a/hw/virtio/virtio-bus.c
+++ b/hw/virtio/virtio-bus.c
@@ -348,7 +348,7 @@ bool virtio_bus_device_iommu_enabled(VirtIODevice *vdev)
     return klass->iommu_enabled(qbus->parent);
 }
 
-static void virtio_bus_class_init(ObjectClass *klass, void *data)
+static void virtio_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *bus_class = BUS_CLASS(klass);
     bus_class->get_dev_path = virtio_bus_get_dev_path;
diff --git a/hw/virtio/virtio-crypto-pci.c b/hw/virtio/virtio-crypto-pci.c
index 8699481375..868abc03a9 100644
--- a/hw/virtio/virtio-crypto-pci.c
+++ b/hw/virtio/virtio-crypto-pci.c
@@ -59,7 +59,7 @@ static void virtio_crypto_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     }
 }
 
-static void virtio_crypto_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_crypto_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c
index a1b3c90618..e24d6914b6 100644
--- a/hw/virtio/virtio-crypto.c
+++ b/hw/virtio/virtio-crypto.c
@@ -1264,7 +1264,7 @@ static struct vhost_dev *virtio_crypto_get_vhost(VirtIODevice *vdev)
     return &vhost_crypto->dev;
 }
 
-static void virtio_crypto_class_init(ObjectClass *klass, void *data)
+static void virtio_crypto_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/virtio-input-pci.c b/hw/virtio/virtio-input-pci.c
index 9e3c106777..3be5358b4c 100644
--- a/hw/virtio/virtio-input-pci.c
+++ b/hw/virtio/virtio-input-pci.c
@@ -50,7 +50,7 @@ static void virtio_input_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void virtio_input_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_input_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
@@ -63,7 +63,8 @@ static void virtio_input_pci_class_init(ObjectClass *klass, void *data)
     pcidev_k->class_id = PCI_CLASS_INPUT_OTHER;
 }
 
-static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass,
+                                                const void *data)
 {
     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 
@@ -71,7 +72,7 @@ static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data)
 }
 
 static void virtio_input_hid_mouse_pci_class_init(ObjectClass *klass,
-                                                  void *data)
+                                                  const void *data)
 {
     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 
diff --git a/hw/virtio/virtio-iommu-pci.c b/hw/virtio/virtio-iommu-pci.c
index 97e03ce803..8123c6f83a 100644
--- a/hw/virtio/virtio-iommu-pci.c
+++ b/hw/virtio/virtio-iommu-pci.c
@@ -73,7 +73,7 @@ static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void virtio_iommu_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_iommu_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index b6e7e01ef7..54060988ef 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -1664,7 +1664,7 @@ static const Property virtio_iommu_properties[] = {
     DEFINE_PROP_UINT8("aw-bits", VirtIOIOMMU, aw_bits, 64),
 };
 
-static void virtio_iommu_class_init(ObjectClass *klass, void *data)
+static void virtio_iommu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
@@ -1690,7 +1690,7 @@ static void virtio_iommu_class_init(ObjectClass *klass, void *data)
 }
 
 static void virtio_iommu_memory_region_class_init(ObjectClass *klass,
-                                                  void *data)
+                                                  const void *data)
 {
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
diff --git a/hw/virtio/virtio-md-pci.c b/hw/virtio/virtio-md-pci.c
index 9ec5067662..9278b32cf8 100644
--- a/hw/virtio/virtio-md-pci.c
+++ b/hw/virtio/virtio-md-pci.c
@@ -138,7 +138,7 @@ static const TypeInfo virtio_md_pci_info = {
     .instance_size = sizeof(VirtIOMDPCI),
     .class_size = sizeof(VirtIOMDPCIClass),
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_MEMORY_DEVICE },
         { }
     },
diff --git a/hw/virtio/virtio-mem-pci.c b/hw/virtio/virtio-mem-pci.c
index 6cc5f0fd3b..f592eb1a78 100644
--- a/hw/virtio/virtio-mem-pci.c
+++ b/hw/virtio/virtio-mem-pci.c
@@ -163,7 +163,7 @@ static const Property virtio_mem_pci_class_properties[] = {
                        DEV_NVECTORS_UNSPECIFIED),
 };
 
-static void virtio_mem_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_mem_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c
index c7968ee0c6..a3d1a676e7 100644
--- a/hw/virtio/virtio-mem.c
+++ b/hw/virtio/virtio-mem.c
@@ -1865,7 +1865,7 @@ static void virtio_mem_unplug_request_check(VirtIOMEM *vmem, Error **errp)
     }
 }
 
-static void virtio_mem_class_init(ObjectClass *klass, void *data)
+static void virtio_mem_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
@@ -1907,7 +1907,7 @@ static const TypeInfo virtio_mem_info = {
     .instance_finalize = virtio_mem_instance_finalize,
     .class_init = virtio_mem_class_init,
     .class_size = sizeof(VirtIOMEMClass),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_RAM_DISCARD_MANAGER },
         { }
     },
@@ -1957,7 +1957,8 @@ static void virtio_mem_system_reset_hold(Object *obj, ResetType type)
     virtio_mem_unplug_all(vmem);
 }
 
-static void virtio_mem_system_reset_class_init(ObjectClass *klass, void *data)
+static void virtio_mem_system_reset_class_init(ObjectClass *klass,
+                                               const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
 
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
index 029817139b..532c67107b 100644
--- a/hw/virtio/virtio-mmio.c
+++ b/hw/virtio/virtio-mmio.c
@@ -784,7 +784,7 @@ static void virtio_mmio_realizefn(DeviceState *d, Error **errp)
     sysbus_init_mmio(sbd, &proxy->iomem);
 }
 
-static void virtio_mmio_class_init(ObjectClass *klass, void *data)
+static void virtio_mmio_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -855,7 +855,7 @@ static void virtio_mmio_vmstate_change(DeviceState *d, bool running)
     }
 }
 
-static void virtio_mmio_bus_class_init(ObjectClass *klass, void *data)
+static void virtio_mmio_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *bus_class = BUS_CLASS(klass);
     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
diff --git a/hw/virtio/virtio-net-pci.c b/hw/virtio/virtio-net-pci.c
index e18953ad67..8cf9788bc3 100644
--- a/hw/virtio/virtio-net-pci.c
+++ b/hw/virtio/virtio-net-pci.c
@@ -63,7 +63,7 @@ static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_net_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
diff --git a/hw/virtio/virtio-nsm-pci.c b/hw/virtio/virtio-nsm-pci.c
index dca797315a..ec243963e1 100644
--- a/hw/virtio/virtio-nsm-pci.c
+++ b/hw/virtio/virtio-nsm-pci.c
@@ -40,7 +40,7 @@ static void virtio_nsm_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     }
 }
 
-static void virtio_nsm_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_nsm_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio-nsm.c b/hw/virtio/virtio-nsm.c
index accf7334e3..3bf5e7009a 100644
--- a/hw/virtio/virtio-nsm.c
+++ b/hw/virtio/virtio-nsm.c
@@ -1708,7 +1708,7 @@ static const Property virtio_nsm_properties[] = {
     DEFINE_PROP_STRING("module-id", VirtIONSM, module_id),
 };
 
-static void virtio_nsm_class_init(ObjectClass *klass, void *data)
+static void virtio_nsm_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 3ca3f849d3..0fa8fe4955 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -2399,7 +2399,7 @@ static int virtio_pci_sync_config(DeviceState *dev, Error **errp)
     return qdev_sync_config(DEVICE(vdev), errp);
 }
 
-static void virtio_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -2433,7 +2433,7 @@ static const Property virtio_pci_generic_properties[] = {
     DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false),
 };
 
-static void virtio_pci_base_class_init(ObjectClass *klass, void *data)
+static void virtio_pci_base_class_init(ObjectClass *klass, const void *data)
 {
     const VirtioPCIDeviceTypeInfo *t = data;
     if (t->class_init) {
@@ -2441,7 +2441,7 @@ static void virtio_pci_base_class_init(ObjectClass *klass, void *data)
     }
 }
 
-static void virtio_pci_generic_class_init(ObjectClass *klass, void *data)
+static void virtio_pci_generic_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -2481,7 +2481,7 @@ void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t)
         .name = t->generic_name,
         .parent = base_type_info.name,
         .class_init = virtio_pci_generic_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { INTERFACE_PCIE_DEVICE },
             { INTERFACE_CONVENTIONAL_PCI_DEVICE },
             { }
@@ -2497,13 +2497,13 @@ void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t)
 
         generic_type_info.parent = base_name;
         generic_type_info.class_init = virtio_pci_base_class_init;
-        generic_type_info.class_data = (void *)t;
+        generic_type_info.class_data = t;
 
         assert(!t->non_transitional_name);
         assert(!t->transitional_name);
     } else {
         base_type_info.class_init = virtio_pci_base_class_init;
-        base_type_info.class_data = (void *)t;
+        base_type_info.class_data = t;
     }
 
     type_register_static(&base_type_info);
@@ -2516,7 +2516,7 @@ void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t)
             .name          = t->non_transitional_name,
             .parent        = base_type_info.name,
             .instance_init = virtio_pci_non_transitional_instance_init,
-            .interfaces = (InterfaceInfo[]) {
+            .interfaces = (const InterfaceInfo[]) {
                 { INTERFACE_PCIE_DEVICE },
                 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
                 { }
@@ -2530,7 +2530,7 @@ void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t)
             .name          = t->transitional_name,
             .parent        = base_type_info.name,
             .instance_init = virtio_pci_transitional_instance_init,
-            .interfaces = (InterfaceInfo[]) {
+            .interfaces = (const InterfaceInfo[]) {
                 /*
                  * Transitional virtio devices work only as Conventional PCI
                  * devices because they require PIO ports.
@@ -2586,7 +2586,7 @@ static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
     qbus_init(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev, virtio_bus_name);
 }
 
-static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
+static void virtio_pci_bus_class_init(ObjectClass *klass, const void *data)
 {
     BusClass *bus_class = BUS_CLASS(klass);
     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
diff --git a/hw/virtio/virtio-pmem-pci.c b/hw/virtio/virtio-pmem-pci.c
index cfe7f3b67c..babd91c21f 100644
--- a/hw/virtio/virtio-pmem-pci.c
+++ b/hw/virtio/virtio-pmem-pci.c
@@ -80,7 +80,7 @@ static void virtio_pmem_pci_fill_device_info(const MemoryDeviceState *md,
     info->type = MEMORY_DEVICE_INFO_KIND_VIRTIO_PMEM;
 }
 
-static void virtio_pmem_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_pmem_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio-pmem.c b/hw/virtio/virtio-pmem.c
index adb3268bd4..3416ea1827 100644
--- a/hw/virtio/virtio-pmem.c
+++ b/hw/virtio/virtio-pmem.c
@@ -161,7 +161,7 @@ static const Property virtio_pmem_properties[] = {
                      TYPE_MEMORY_BACKEND, HostMemoryBackend *),
 };
 
-static void virtio_pmem_class_init(ObjectClass *klass, void *data)
+static void virtio_pmem_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/virtio-rng-pci.c b/hw/virtio/virtio-rng-pci.c
index a94ff767b2..39b600356e 100644
--- a/hw/virtio/virtio-rng-pci.c
+++ b/hw/virtio/virtio-rng-pci.c
@@ -53,7 +53,7 @@ static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     }
 }
 
-static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_rng_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index a515fc5cd9..dcb3c71d6a 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -260,7 +260,7 @@ static const Property virtio_rng_properties[] = {
     DEFINE_PROP_LINK("rng", VirtIORNG, conf.rng, TYPE_RNG_BACKEND, RngBackend *),
 };
 
-static void virtio_rng_class_init(ObjectClass *klass, void *data)
+static void virtio_rng_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/virtio/virtio-scsi-pci.c b/hw/virtio/virtio-scsi-pci.c
index d44fd2fffb..af87759207 100644
--- a/hw/virtio/virtio-scsi-pci.c
+++ b/hw/virtio/virtio-scsi-pci.c
@@ -72,7 +72,7 @@ static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
-static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_scsi_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio-serial-pci.c b/hw/virtio/virtio-serial-pci.c
index b5b77eb266..3f212ffe52 100644
--- a/hw/virtio/virtio-serial-pci.c
+++ b/hw/virtio/virtio-serial-pci.c
@@ -76,7 +76,7 @@ static const Property virtio_serial_pci_properties[] = {
     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
 };
 
-static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
+static void virtio_serial_pci_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index ffc12635ae..480c2e5036 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2248,7 +2248,7 @@ int virtio_set_status(VirtIODevice *vdev, uint8_t val)
 
 static enum virtio_device_endian virtio_default_endian(void)
 {
-    if (target_words_bigendian()) {
+    if (target_big_endian()) {
         return VIRTIO_DEVICE_ENDIAN_BIG;
     } else {
         return VIRTIO_DEVICE_ENDIAN_LITTLE;
@@ -4138,7 +4138,7 @@ void virtio_device_release_ioeventfd(VirtIODevice *vdev)
     virtio_bus_release_ioeventfd(vbus);
 }
 
-static void virtio_device_class_init(ObjectClass *klass, void *data)
+static void virtio_device_class_init(ObjectClass *klass, const void *data)
 {
     /* Set the default value here. */
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
diff --git a/hw/vmapple/aes.c b/hw/vmapple/aes.c
index 3a7641ab4b..a4853a98f8 100644
--- a/hw/vmapple/aes.c
+++ b/hw/vmapple/aes.c
@@ -558,7 +558,7 @@ static void aes_init(Object *obj)
     s->as = &address_space_memory;
 }
 
-static void aes_class_init(ObjectClass *klass, void *data)
+static void aes_class_init(ObjectClass *klass, const void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
 
diff --git a/hw/vmapple/bdif.c b/hw/vmapple/bdif.c
index 5827dd2aab..5ccd374581 100644
--- a/hw/vmapple/bdif.c
+++ b/hw/vmapple/bdif.c
@@ -250,7 +250,7 @@ static const Property bdif_properties[] = {
     DEFINE_PROP_DRIVE("root", VMAppleBdifState, root),
 };
 
-static void bdif_class_init(ObjectClass *klass, void *data)
+static void bdif_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/vmapple/cfg.c b/hw/vmapple/cfg.c
index 63414d801f..3d58a29f69 100644
--- a/hw/vmapple/cfg.c
+++ b/hw/vmapple/cfg.c
@@ -168,7 +168,7 @@ static const Property vmapple_cfg_properties[] = {
     DEFINE_PROP_STRING("soc_name", VMAppleCfgState, soc_name),
 };
 
-static void vmapple_cfg_class_init(ObjectClass *klass, void *data)
+static void vmapple_cfg_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
diff --git a/hw/vmapple/virtio-blk.c b/hw/vmapple/virtio-blk.c
index aa3f18c47d..532b5649ab 100644
--- a/hw/vmapple/virtio-blk.c
+++ b/hw/vmapple/virtio-blk.c
@@ -82,7 +82,7 @@ static void vmapple_virtio_blk_get_config(VirtIODevice *vdev, uint8_t *config)
     stl_he_p(&blkcfg->max_secure_erase_sectors, dev->apple_type);
 }
 
-static void vmapple_virtio_blk_class_init(ObjectClass *klass, void *data)
+static void vmapple_virtio_blk_class_init(ObjectClass *klass, const void *data)
 {
     VirtIOBlkClass *vbk = VIRTIO_BLK_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
@@ -165,7 +165,8 @@ static void vmapple_virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **err
                              PCI_DEVICE_ID_APPLE_VIRTIO_BLK);
 }
 
-static void vmapple_virtio_blk_pci_class_init(ObjectClass *klass, void *data)
+static void vmapple_virtio_blk_pci_class_init(ObjectClass *klass,
+                                              const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
diff --git a/hw/vmapple/vmapple.c b/hw/vmapple/vmapple.c
index fa117bf151..16e6110b68 100644
--- a/hw/vmapple/vmapple.c
+++ b/hw/vmapple/vmapple.c
@@ -570,7 +570,7 @@ static GlobalProperty vmapple_compat_defaults[] = {
     { TYPE_XHCI_PCI, "conditional-intr-mapping", "on" },
 };
 
-static void vmapple_machine_class_init(ObjectClass *oc, void *data)
+static void vmapple_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/watchdog/allwinner-wdt.c b/hw/watchdog/allwinner-wdt.c
index 78f4f9d6f6..8fcd776675 100644
--- a/hw/watchdog/allwinner-wdt.c
+++ b/hw/watchdog/allwinner-wdt.c
@@ -348,7 +348,7 @@ static void allwinner_wdt_realize(DeviceState *dev, Error **errp)
     ptimer_transaction_commit(s->timer);
 }
 
-static void allwinner_wdt_class_init(ObjectClass *klass, void *data)
+static void allwinner_wdt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -358,7 +358,7 @@ static void allwinner_wdt_class_init(ObjectClass *klass, void *data)
     dc->vmsd = &allwinner_wdt_vmstate;
 }
 
-static void allwinner_wdt_sun4i_class_init(ObjectClass *klass, void *data)
+static void allwinner_wdt_sun4i_class_init(ObjectClass *klass, const void *data)
 {
     AwWdtClass *awc = AW_WDT_CLASS(klass);
 
@@ -371,7 +371,7 @@ static void allwinner_wdt_sun4i_class_init(ObjectClass *klass, void *data)
     awc->get_intv_value = allwinner_wdt_sun4i_get_intv_value;
 }
 
-static void allwinner_wdt_sun6i_class_init(ObjectClass *klass, void *data)
+static void allwinner_wdt_sun6i_class_init(ObjectClass *klass, const void *data)
 {
     AwWdtClass *awc = AW_WDT_CLASS(klass);
 
diff --git a/hw/watchdog/cmsdk-apb-watchdog.c b/hw/watchdog/cmsdk-apb-watchdog.c
index a52121dc44..6a8d07ca56 100644
--- a/hw/watchdog/cmsdk-apb-watchdog.c
+++ b/hw/watchdog/cmsdk-apb-watchdog.c
@@ -394,7 +394,7 @@ static const VMStateDescription cmsdk_apb_watchdog_vmstate = {
     }
 };
 
-static void cmsdk_apb_watchdog_class_init(ObjectClass *klass, void *data)
+static void cmsdk_apb_watchdog_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/watchdog/sbsa_gwdt.c b/hw/watchdog/sbsa_gwdt.c
index 1dd21392a9..ce84849df0 100644
--- a/hw/watchdog/sbsa_gwdt.c
+++ b/hw/watchdog/sbsa_gwdt.c
@@ -271,7 +271,7 @@ static const Property wdt_sbsa_gwdt_props[] = {
                        62500000),
 };
 
-static void wdt_sbsa_gwdt_class_init(ObjectClass *klass, void *data)
+static void wdt_sbsa_gwdt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/watchdog/spapr_watchdog.c b/hw/watchdog/spapr_watchdog.c
index 2bb1d3c532..5b3f50de3a 100644
--- a/hw/watchdog/spapr_watchdog.c
+++ b/hw/watchdog/spapr_watchdog.c
@@ -249,7 +249,7 @@ static void spapr_wdt_realize(DeviceState *dev, Error **errp)
                                   &w->leave_others, OBJ_PROP_FLAG_READ);
 }
 
-static void spapr_wdt_class_init(ObjectClass *oc, void *data)
+static void spapr_wdt_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/hw/watchdog/wdt_aspeed.c b/hw/watchdog/wdt_aspeed.c
index a503b2aea7..30226435ef 100644
--- a/hw/watchdog/wdt_aspeed.c
+++ b/hw/watchdog/wdt_aspeed.c
@@ -307,7 +307,7 @@ static const Property aspeed_wdt_properties[] = {
                      AspeedSCUState *),
 };
 
-static void aspeed_wdt_class_init(ObjectClass *klass, void *data)
+static void aspeed_wdt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -329,7 +329,7 @@ static const TypeInfo aspeed_wdt_info = {
     .abstract      = true,
 };
 
-static void aspeed_2400_wdt_class_init(ObjectClass *klass, void *data)
+static void aspeed_2400_wdt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
@@ -366,7 +366,7 @@ static void aspeed_2500_wdt_reset_pulse(AspeedWDTState *s, uint32_t property)
     }
 }
 
-static void aspeed_2500_wdt_class_init(ObjectClass *klass, void *data)
+static void aspeed_2500_wdt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
@@ -389,7 +389,7 @@ static const TypeInfo aspeed_2500_wdt_info = {
     .class_init = aspeed_2500_wdt_class_init,
 };
 
-static void aspeed_2600_wdt_class_init(ObjectClass *klass, void *data)
+static void aspeed_2600_wdt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
@@ -412,7 +412,7 @@ static const TypeInfo aspeed_2600_wdt_info = {
     .class_init = aspeed_2600_wdt_class_init,
 };
 
-static void aspeed_1030_wdt_class_init(ObjectClass *klass, void *data)
+static void aspeed_1030_wdt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
@@ -435,7 +435,7 @@ static const TypeInfo aspeed_1030_wdt_info = {
     .class_init = aspeed_1030_wdt_class_init,
 };
 
-static void aspeed_2700_wdt_class_init(ObjectClass *klass, void *data)
+static void aspeed_2700_wdt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
diff --git a/hw/watchdog/wdt_diag288.c b/hw/watchdog/wdt_diag288.c
index 39f2894f21..1275353e8e 100644
--- a/hw/watchdog/wdt_diag288.c
+++ b/hw/watchdog/wdt_diag288.c
@@ -108,7 +108,7 @@ static void wdt_diag288_unrealize(DeviceState *dev)
     timer_free(diag288->timer);
 }
 
-static void wdt_diag288_class_init(ObjectClass *klass, void *data)
+static void wdt_diag288_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     DIAG288Class *diag288 = DIAG288_CLASS(klass);
diff --git a/hw/watchdog/wdt_i6300esb.c b/hw/watchdog/wdt_i6300esb.c
index aa1d0866c8..bb8a2766b6 100644
--- a/hw/watchdog/wdt_i6300esb.c
+++ b/hw/watchdog/wdt_i6300esb.c
@@ -457,7 +457,7 @@ static void i6300esb_exit(PCIDevice *dev)
     timer_free(d->timer);
 }
 
-static void i6300esb_class_init(ObjectClass *klass, void *data)
+static void i6300esb_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -480,7 +480,7 @@ static const TypeInfo i6300esb_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(I6300State),
     .class_init    = i6300esb_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/watchdog/wdt_ib700.c b/hw/watchdog/wdt_ib700.c
index 23519e058e..51a26a4cbb 100644
--- a/hw/watchdog/wdt_ib700.c
+++ b/hw/watchdog/wdt_ib700.c
@@ -128,7 +128,7 @@ static void wdt_ib700_reset(DeviceState *dev)
     timer_del(s->timer);
 }
 
-static void wdt_ib700_class_init(ObjectClass *klass, void *data)
+static void wdt_ib700_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/watchdog/wdt_imx2.c b/hw/watchdog/wdt_imx2.c
index 18e40bd466..10151a15d0 100644
--- a/hw/watchdog/wdt_imx2.c
+++ b/hw/watchdog/wdt_imx2.c
@@ -286,7 +286,7 @@ static const Property imx2_wdt_properties[] = {
                      false),
 };
 
-static void imx2_wdt_class_init(ObjectClass *klass, void *data)
+static void imx2_wdt_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/hw/xen/xen-bus.c b/hw/xen/xen-bus.c
index f808a01813..6bd2e546f6 100644
--- a/hw/xen/xen-bus.c
+++ b/hw/xen/xen-bus.c
@@ -380,7 +380,7 @@ static void xen_bus_unplug_request(HotplugHandler *hotplug,
     xen_device_unplug(xendev, errp);
 }
 
-static void xen_bus_class_init(ObjectClass *class, void *data)
+static void xen_bus_class_init(ObjectClass *class, const void *data)
 {
     BusClass *bus_class = BUS_CLASS(class);
     HotplugHandlerClass *hotplug_class = HOTPLUG_HANDLER_CLASS(class);
@@ -399,7 +399,7 @@ static const TypeInfo xen_bus_type_info = {
     .instance_size = sizeof(XenBus),
     .class_size = sizeof(XenBusClass),
     .class_init = xen_bus_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     },
@@ -1107,7 +1107,7 @@ static const Property xen_device_props[] = {
                        DOMID_INVALID),
 };
 
-static void xen_device_class_init(ObjectClass *class, void *data)
+static void xen_device_class_init(ObjectClass *class, const void *data)
 {
     DeviceClass *dev_class = DEVICE_CLASS(class);
 
diff --git a/hw/xen/xen-legacy-backend.c b/hw/xen/xen-legacy-backend.c
index bf58db0ca6..5ed53f8943 100644
--- a/hw/xen/xen-legacy-backend.c
+++ b/hw/xen/xen-legacy-backend.c
@@ -635,7 +635,7 @@ int xen_be_bind_evtchn(struct XenLegacyDevice *xendev)
 }
 
 
-static void xendev_class_init(ObjectClass *klass, void *data)
+static void xendev_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
@@ -650,7 +650,7 @@ static const TypeInfo xendev_type_info = {
     .instance_size = sizeof(XenLegacyDevice),
 };
 
-static void xen_sysbus_class_init(ObjectClass *klass, void *data)
+static void xen_sysbus_class_init(ObjectClass *klass, const void *data)
 {
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 
@@ -661,7 +661,7 @@ static const TypeInfo xensysbus_info = {
     .name       = TYPE_XENSYSBUS,
     .parent     = TYPE_BUS,
     .class_init = xen_sysbus_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
         { }
     }
diff --git a/hw/xen/xen-pvh-common.c b/hw/xen/xen-pvh-common.c
index d675f7a8ae..b93ff80c85 100644
--- a/hw/xen/xen-pvh-common.c
+++ b/hw/xen/xen-pvh-common.c
@@ -369,7 +369,7 @@ do {                                                                      \
 #endif
 }
 
-static void xen_pvh_class_init(ObjectClass *oc, void *data)
+static void xen_pvh_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
index 9487f68f2e..9d16644d82 100644
--- a/hw/xen/xen_pt.c
+++ b/hw/xen/xen_pt.c
@@ -1047,7 +1047,7 @@ static void xen_igd_clear_slot(DeviceState *qdev, Error **errp)
     xpdc->pci_qdev_realize(qdev, errp);
 }
 
-static void xen_pci_passthrough_class_init(ObjectClass *klass, void *data)
+static void xen_pci_passthrough_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -1079,7 +1079,7 @@ static const TypeInfo xen_pci_passthrough_info = {
     .class_init = xen_pci_passthrough_class_init,
     .class_size = sizeof(XenPTDeviceClass),
     .instance_init = xen_pci_passthrough_instance_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { INTERFACE_PCIE_DEVICE },
         { },
diff --git a/hw/xen/xen_pt_graphics.c b/hw/xen/xen_pt_graphics.c
index 6c2e3f4840..2c0cec9723 100644
--- a/hw/xen/xen_pt_graphics.c
+++ b/hw/xen/xen_pt_graphics.c
@@ -347,7 +347,7 @@ static const IGDDeviceIDInfo igd_combo_id_infos[] = {
     {0x162D, 0x9cc3, 0x03}, /* BDWGT3SRVR, BDWM_w7 */
 };
 
-static void isa_bridge_class_init(ObjectClass *klass, void *data)
+static void isa_bridge_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -363,7 +363,7 @@ static const TypeInfo isa_bridge_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = isa_bridge_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
diff --git a/hw/xtensa/xtfpga.c b/hw/xtensa/xtfpga.c
index 3bd0ef8268..6efffae466 100644
--- a/hw/xtensa/xtfpga.c
+++ b/hw/xtensa/xtfpga.c
@@ -585,7 +585,7 @@ static void xtfpga_kc705_nommu_init(MachineState *machine)
     xtfpga_init(&kc705_board, machine);
 }
 
-static void xtfpga_lx60_class_init(ObjectClass *oc, void *data)
+static void xtfpga_lx60_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -602,7 +602,7 @@ static const TypeInfo xtfpga_lx60_type = {
     .class_init = xtfpga_lx60_class_init,
 };
 
-static void xtfpga_lx60_nommu_class_init(ObjectClass *oc, void *data)
+static void xtfpga_lx60_nommu_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -619,7 +619,7 @@ static const TypeInfo xtfpga_lx60_nommu_type = {
     .class_init = xtfpga_lx60_nommu_class_init,
 };
 
-static void xtfpga_lx200_class_init(ObjectClass *oc, void *data)
+static void xtfpga_lx200_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -636,7 +636,7 @@ static const TypeInfo xtfpga_lx200_type = {
     .class_init = xtfpga_lx200_class_init,
 };
 
-static void xtfpga_lx200_nommu_class_init(ObjectClass *oc, void *data)
+static void xtfpga_lx200_nommu_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -653,7 +653,7 @@ static const TypeInfo xtfpga_lx200_nommu_type = {
     .class_init = xtfpga_lx200_nommu_class_init,
 };
 
-static void xtfpga_ml605_class_init(ObjectClass *oc, void *data)
+static void xtfpga_ml605_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -670,7 +670,7 @@ static const TypeInfo xtfpga_ml605_type = {
     .class_init = xtfpga_ml605_class_init,
 };
 
-static void xtfpga_ml605_nommu_class_init(ObjectClass *oc, void *data)
+static void xtfpga_ml605_nommu_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -687,7 +687,7 @@ static const TypeInfo xtfpga_ml605_nommu_type = {
     .class_init = xtfpga_ml605_nommu_class_init,
 };
 
-static void xtfpga_kc705_class_init(ObjectClass *oc, void *data)
+static void xtfpga_kc705_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -704,7 +704,7 @@ static const TypeInfo xtfpga_kc705_type = {
     .class_init = xtfpga_kc705_class_init,
 };
 
-static void xtfpga_kc705_nommu_class_init(ObjectClass *oc, void *data)
+static void xtfpga_kc705_nommu_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/include/accel/accel-cpu-target.h b/include/accel/accel-cpu-target.h
index 37dde7fae3..6feb344e29 100644
--- a/include/accel/accel-cpu-target.h
+++ b/include/accel/accel-cpu-target.h
@@ -21,21 +21,11 @@
  */
 
 #include "qom/object.h"
+#include "accel/accel-cpu.h"
 #include "cpu.h"
 
 #define TYPE_ACCEL_CPU "accel-" CPU_RESOLVING_TYPE
 #define ACCEL_CPU_NAME(name) (name "-" TYPE_ACCEL_CPU)
-typedef struct AccelCPUClass AccelCPUClass;
 DECLARE_CLASS_CHECKERS(AccelCPUClass, ACCEL_CPU, TYPE_ACCEL_CPU)
 
-typedef struct AccelCPUClass {
-    /*< private >*/
-    ObjectClass parent_class;
-    /*< public >*/
-
-    void (*cpu_class_init)(CPUClass *cc);
-    void (*cpu_instance_init)(CPUState *cpu);
-    bool (*cpu_target_realize)(CPUState *cpu, Error **errp);
-} AccelCPUClass;
-
 #endif /* ACCEL_CPU_H */
diff --git a/include/accel/accel-cpu.h b/include/accel/accel-cpu.h
new file mode 100644
index 0000000000..9e7eede7c3
--- /dev/null
+++ b/include/accel/accel-cpu.h
@@ -0,0 +1,23 @@
+/*
+ * Accelerator interface, specializes CPUClass
+ *
+ * Copyright 2021 SUSE LLC
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef ACCEL_CPU_H
+#define ACCEL_CPU_H
+
+#include "qom/object.h"
+#include "hw/core/cpu.h"
+
+typedef struct AccelCPUClass {
+    ObjectClass parent_class;
+
+    void (*cpu_class_init)(CPUClass *cc);
+    void (*cpu_instance_init)(CPUState *cpu);
+    bool (*cpu_target_realize)(CPUState *cpu, Error **errp);
+} AccelCPUClass;
+
+#endif /* ACCEL_CPU_H */
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index 9b83fd7ac8..dab1e7e580 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -44,12 +44,6 @@ enum device_endian {
     DEVICE_LITTLE_ENDIAN,
 };
 
-#if HOST_BIG_ENDIAN
-#define DEVICE_HOST_ENDIAN DEVICE_BIG_ENDIAN
-#else
-#define DEVICE_HOST_ENDIAN DEVICE_LITTLE_ENDIAN
-#endif
-
 /* address in the RAM (different from a physical address) */
 #if defined(CONFIG_XEN_BACKEND)
 typedef uint64_t ram_addr_t;
diff --git a/include/exec/tswap.h b/include/exec/tswap.h
index 84060a4999..49511f2611 100644
--- a/include/exec/tswap.h
+++ b/include/exec/tswap.h
@@ -11,15 +11,15 @@
 #include "qemu/bswap.h"
 
 /**
- * target_words_bigendian:
+ * target_big_endian:
  * Returns true if the (default) endianness of the target is big endian,
  * false otherwise. Common code should normally never need to know about the
  * endianness of the target, so please do *not* use this function unless you
  * know very well what you are doing!
  */
-bool target_words_bigendian(void);
+bool target_big_endian(void);
 #ifdef COMPILING_PER_TARGET
-#define target_words_bigendian()  TARGET_BIG_ENDIAN
+#define target_big_endian()   TARGET_BIG_ENDIAN
 #endif
 
 /*
@@ -29,7 +29,7 @@ bool target_words_bigendian(void);
 #ifdef COMPILING_PER_TARGET
 #define target_needs_bswap()  (HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN)
 #else
-#define target_needs_bswap()  (HOST_BIG_ENDIAN != target_words_bigendian())
+#define target_needs_bswap()  (HOST_BIG_ENDIAN != target_big_endian())
 #endif /* COMPILING_PER_TARGET */
 
 static inline uint16_t tswap16(uint16_t s)
@@ -83,7 +83,7 @@ static inline void tswap64s(uint64_t *s)
 /* Return ld{word}_{le,be}_p following target endianness. */
 #define LOAD_IMPL(word, args...)                    \
 do {                                                \
-    if (target_words_bigendian()) {                 \
+    if (target_big_endian()) {                      \
         return glue(glue(ld, word), _be_p)(args);   \
     } else {                                        \
         return glue(glue(ld, word), _le_p)(args);   \
@@ -120,7 +120,7 @@ static inline uint64_t ldn_p(const void *ptr, int sz)
 /* Call st{word}_{le,be}_p following target endianness. */
 #define STORE_IMPL(word, args...)           \
 do {                                        \
-    if (target_words_bigendian()) {         \
+    if (target_big_endian()) {              \
         glue(glue(st, word), _be_p)(args);  \
     } else {                                \
         glue(glue(st, word), _le_p)(args);  \
diff --git a/include/hw/boards.h b/include/hw/boards.h
index 8556e01e21..765dc8dd35 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -745,7 +745,7 @@ struct MachineState {
     } while (0)
 
 #define DEFINE_MACHINE(namestr, machine_initfn) \
-    static void machine_initfn##_class_init(ObjectClass *oc, void *data) \
+    static void machine_initfn##_class_init(ObjectClass *oc, const void *data) \
     { \
         MachineClass *mc = MACHINE_CLASS(oc); \
         machine_initfn(mc); \
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index c8d6abff19..12b2ff1f7d 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -102,6 +102,7 @@ struct SysemuCPUOps;
  * CPUClass:
  * @class_by_name: Callback to map -cpu command line model name to an
  *                 instantiatable CPU type.
+ * @list_cpus: list available CPU models and flags.
  * @parse_features: Callback to parse command line arguments.
  * @reset_dump_flags: #CPUDumpFlags to use for reset logging.
  * @memory_rw_debug: Callback for GDB memory access.
@@ -130,10 +131,15 @@ struct SysemuCPUOps;
  * @gdb_num_core_regs: Number of core registers accessible to GDB or 0 to infer
  *                     from @gdb_core_xml_file.
  * @gdb_core_xml_file: File name for core registers GDB XML description.
+ * @gdb_get_core_xml_file: Optional callback that returns the file name for
+ * the core registers GDB XML description. The returned value is expected to
+ * be a simple constant string: the caller will not g_free() it. If this
+ * is NULL then @gdb_core_xml_file will be used instead.
  * @gdb_stop_before_watchpoint: Indicates whether GDB expects the CPU to stop
  *           before the insn which triggers a watchpoint rather than after it.
  * @gdb_arch_name: Optional callback that returns the architecture name known
- * to GDB. The caller must free the returned string with g_free.
+ * to GDB. The returned value is expected to be a simple constant string:
+ * the caller will not g_free() it.
  * @disas_set_info: Setup architecture specific components of disassembly info
  * @adjust_watchpoint_address: Perform a target-specific adjustment to an
  * address before attempting to match it against watchpoints.
@@ -148,6 +154,7 @@ struct CPUClass {
     /*< public >*/
 
     ObjectClass *(*class_by_name)(const char *cpu_model);
+    void (*list_cpus)(void);
     void (*parse_features)(const char *typename, char *str, Error **errp);
 
     int (*memory_rw_debug)(CPUState *cpu, vaddr addr,
@@ -163,6 +170,7 @@ struct CPUClass {
 
     const char *gdb_core_xml_file;
     const gchar * (*gdb_arch_name)(CPUState *cpu);
+    const char * (*gdb_get_core_xml_file)(CPUState *cpu);
 
     void (*disas_set_info)(CPUState *cpu, disassemble_info *info);
 
@@ -1113,8 +1121,6 @@ bool cpu_exec_realizefn(CPUState *cpu, Error **errp);
 void cpu_exec_unrealizefn(CPUState *cpu);
 void cpu_exec_reset_hold(CPUState *cpu);
 
-const char *target_name(void);
-
 #ifdef COMPILING_PER_TARGET
 
 extern const VMStateDescription vmstate_cpu_common;
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 8677dc8950..9563674e2d 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -306,7 +306,8 @@ extern GlobalProperty pc_compat_2_4[];
 extern const size_t pc_compat_2_4_len;
 
 #define DEFINE_PC_MACHINE(suffix, namestr, initfn, optsfn) \
-    static void pc_machine_##suffix##_class_init(ObjectClass *oc, void *data) \
+    static void pc_machine_##suffix##_class_init(ObjectClass *oc, \
+                                                 const void *data) \
     { \
         MachineClass *mc = MACHINE_CLASS(oc); \
         optsfn(mc); \
@@ -331,7 +332,7 @@ extern const size_t pc_compat_2_4_len;
     } \
     static void MACHINE_VER_SYM(class_init, namesym, __VA_ARGS__)( \
         ObjectClass *oc, \
-        void *data) \
+        const void *data) \
     { \
         MachineClass *mc = MACHINE_CLASS(oc); \
         MACHINE_VER_SYM(options, namesym, __VA_ARGS__)(mc); \
diff --git a/include/hw/virtio/virtio-pci.h b/include/hw/virtio/virtio-pci.h
index 971c5fabd4..31ec144509 100644
--- a/include/hw/virtio/virtio-pci.h
+++ b/include/hw/virtio/virtio-pci.h
@@ -255,8 +255,8 @@ typedef struct VirtioPCIDeviceTypeInfo {
     size_t class_size;
     void (*instance_init)(Object *obj);
     void (*instance_finalize)(Object *obj);
-    void (*class_init)(ObjectClass *klass, void *data);
-    InterfaceInfo *interfaces;
+    void (*class_init)(ObjectClass *klass, const void *data);
+    const InterfaceInfo *interfaces;
 } VirtioPCIDeviceTypeInfo;
 
 /* Register virtio-pci type(s).  @t must be static. */
diff --git a/include/qemu/datadir.h b/include/qemu/datadir.h
index 21f9097f58..cca32af300 100644
--- a/include/qemu/datadir.h
+++ b/include/qemu/datadir.h
@@ -1,11 +1,16 @@
 #ifndef QEMU_DATADIR_H
 #define QEMU_DATADIR_H
 
-#define QEMU_FILE_TYPE_BIOS   0
-#define QEMU_FILE_TYPE_KEYMAP 1
+typedef enum {
+    QEMU_FILE_TYPE_BIOS,
+    QEMU_FILE_TYPE_DTB,
+    QEMU_FILE_TYPE_KEYMAP,
+} QemuFileType;
+
 /**
  * qemu_find_file:
  * @type: QEMU_FILE_TYPE_BIOS (for BIOS, VGA BIOS)
+ *        QEMU_FILE_TYPE_DTB (for device tree blobs)
  *        or QEMU_FILE_TYPE_KEYMAP (for keymaps).
  * @name: Relative or absolute file name
  *
@@ -20,7 +25,7 @@
  *
  * Returns: a path that can access @name, or NULL if no matching file exists.
  */
-char *qemu_find_file(int type, const char *name);
+char *qemu_find_file(QemuFileType type, const char *name);
 void qemu_add_default_firmwarepath(void);
 void qemu_add_data_dir(char *path);
 void qemu_list_data_dirs(void);
diff --git a/include/qemu/target-info-impl.h b/include/qemu/target-info-impl.h
new file mode 100644
index 0000000000..d30805f7f2
--- /dev/null
+++ b/include/qemu/target-info-impl.h
@@ -0,0 +1,26 @@
+/*
+ * QEMU TargetInfo structure definition
+ *
+ *  Copyright (c) Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef QEMU_TARGET_INFO_IMPL_H
+#define QEMU_TARGET_INFO_IMPL_H
+
+#include "qemu/target-info.h"
+
+typedef struct TargetInfo {
+    /* runtime equivalent of TARGET_NAME definition */
+    const char *target_name;
+} TargetInfo;
+
+/**
+ * target_info:
+ *
+ * Returns: The TargetInfo structure definition for this target binary.
+ */
+const TargetInfo *target_info(void);
+
+#endif
diff --git a/include/qemu/target-info.h b/include/qemu/target-info.h
new file mode 100644
index 0000000000..58d4136897
--- /dev/null
+++ b/include/qemu/target-info.h
@@ -0,0 +1,26 @@
+/*
+ * QEMU target info API
+ *
+ *  Copyright (c) Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef QEMU_TARGET_INFO_H
+#define QEMU_TARGET_INFO_H
+
+/**
+ * target_name:
+ *
+ * Returns: Canonical target name (i.e. "i386").
+ */
+const char *target_name(void);
+
+/**
+ * target_cpu_type:
+ *
+ * Returns: target CPU base QOM type name (i.e. TYPE_X86_CPU).
+ */
+const char *target_cpu_type(void);
+
+#endif
diff --git a/include/qom/object.h b/include/qom/object.h
index 9192265db7..1d5b033724 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -280,7 +280,7 @@ struct Object
     static void \
     module_obj_name##_finalize(Object *obj); \
     static void \
-    module_obj_name##_class_init(ObjectClass *oc, void *data); \
+    module_obj_name##_class_init(ObjectClass *oc, const void *data); \
     static void \
     module_obj_name##_init(Object *obj); \
     \
@@ -294,7 +294,7 @@ struct Object
         .class_size = CLASS_SIZE, \
         .class_init = module_obj_name##_class_init, \
         .abstract = ABSTRACT, \
-        .interfaces = (InterfaceInfo[]) { __VA_ARGS__ } , \
+        .interfaces = (const InterfaceInfo[]) { __VA_ARGS__ } , \
     }; \
     \
     static void \
@@ -486,11 +486,11 @@ struct TypeInfo
     bool abstract;
     size_t class_size;
 
-    void (*class_init)(ObjectClass *klass, void *data);
-    void (*class_base_init)(ObjectClass *klass, void *data);
-    void *class_data;
+    void (*class_init)(ObjectClass *klass, const void *data);
+    void (*class_base_init)(ObjectClass *klass, const void *data);
+    const void *class_data;
 
-    InterfaceInfo *interfaces;
+    const InterfaceInfo *interfaces;
 };
 
 /**
diff --git a/include/system/kvm.h b/include/system/kvm.h
index 18811cad6f..b690dda137 100644
--- a/include/system/kvm.h
+++ b/include/system/kvm.h
@@ -210,6 +210,10 @@ bool kvm_arm_supports_user_irq(void);
 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
 int kvm_on_sigbus(int code, void *addr);
 
+int kvm_check_extension(KVMState *s, unsigned int extension);
+
+int kvm_vm_ioctl(KVMState *s, unsigned long type, ...);
+
 void kvm_flush_coalesced_mmio_buffer(void);
 
 #ifdef COMPILING_PER_TARGET
@@ -237,8 +241,6 @@ static inline int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_t
 
 int kvm_ioctl(KVMState *s, unsigned long type, ...);
 
-int kvm_vm_ioctl(KVMState *s, unsigned long type, ...);
-
 int kvm_vcpu_ioctl(CPUState *cpu, unsigned long type, ...);
 
 /**
@@ -441,8 +443,6 @@ void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg);
 
 bool kvm_arch_stop_on_emulation_error(CPUState *cpu);
 
-int kvm_check_extension(KVMState *s, unsigned int extension);
-
 int kvm_vm_check_extension(KVMState *s, unsigned int extension);
 
 #define kvm_vm_enable_cap(s, capability, cap_flags, ...)             \
diff --git a/io/channel-buffer.c b/io/channel-buffer.c
index 8096180f85..189fa67ac2 100644
--- a/io/channel-buffer.c
+++ b/io/channel-buffer.c
@@ -225,7 +225,7 @@ static GSource *qio_channel_buffer_create_watch(QIOChannel *ioc,
 
 
 static void qio_channel_buffer_class_init(ObjectClass *klass,
-                                          void *class_data G_GNUC_UNUSED)
+                                          const void *class_data G_GNUC_UNUSED)
 {
     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 
diff --git a/io/channel-command.c b/io/channel-command.c
index 6d5f64e146..8966dd3a2b 100644
--- a/io/channel-command.c
+++ b/io/channel-command.c
@@ -358,7 +358,7 @@ static GSource *qio_channel_command_create_watch(QIOChannel *ioc,
 
 
 static void qio_channel_command_class_init(ObjectClass *klass,
-                                           void *class_data G_GNUC_UNUSED)
+                                           const void *class_data G_GNUC_UNUSED)
 {
     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 
diff --git a/io/channel-file.c b/io/channel-file.c
index 2ea8d08360..ca3f180cc2 100644
--- a/io/channel-file.c
+++ b/io/channel-file.c
@@ -290,7 +290,7 @@ static GSource *qio_channel_file_create_watch(QIOChannel *ioc,
 }
 
 static void qio_channel_file_class_init(ObjectClass *klass,
-                                        void *class_data G_GNUC_UNUSED)
+                                        const void *class_data G_GNUC_UNUSED)
 {
     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 
diff --git a/io/channel-null.c b/io/channel-null.c
index ef99586348..49f1c80a54 100644
--- a/io/channel-null.c
+++ b/io/channel-null.c
@@ -207,7 +207,7 @@ qio_channel_null_create_watch(QIOChannel *ioc,
 
 static void
 qio_channel_null_class_init(ObjectClass *klass,
-                            void *class_data G_GNUC_UNUSED)
+                            const void *class_data G_GNUC_UNUSED)
 {
     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 
diff --git a/io/channel-socket.c b/io/channel-socket.c
index 608bcf066e..088b49ffdb 100644
--- a/io/channel-socket.c
+++ b/io/channel-socket.c
@@ -949,7 +949,7 @@ static GSource *qio_channel_socket_create_watch(QIOChannel *ioc,
 }
 
 static void qio_channel_socket_class_init(ObjectClass *klass,
-                                          void *class_data G_GNUC_UNUSED)
+                                          const void *class_data G_GNUC_UNUSED)
 {
     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 
diff --git a/io/channel-tls.c b/io/channel-tls.c
index caf8301a9e..db2ac1deae 100644
--- a/io/channel-tls.c
+++ b/io/channel-tls.c
@@ -561,7 +561,7 @@ qio_channel_tls_get_session(QIOChannelTLS *ioc)
 }
 
 static void qio_channel_tls_class_init(ObjectClass *klass,
-                                       void *class_data G_GNUC_UNUSED)
+                                       const void *class_data G_GNUC_UNUSED)
 {
     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 
diff --git a/io/channel-websock.c b/io/channel-websock.c
index 55192b770a..08ddb274f0 100644
--- a/io/channel-websock.c
+++ b/io/channel-websock.c
@@ -1308,7 +1308,7 @@ static GSource *qio_channel_websock_create_watch(QIOChannel *ioc,
 }
 
 static void qio_channel_websock_class_init(ObjectClass *klass,
-                                           void *class_data G_GNUC_UNUSED)
+                                           const void *class_data G_GNUC_UNUSED)
 {
     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 
diff --git a/iothread.c b/iothread.c
index 589bcd3552..8810376dce 100644
--- a/iothread.c
+++ b/iothread.c
@@ -292,7 +292,7 @@ static void iothread_set_poll_param(Object *obj, Visitor *v,
     }
 }
 
-static void iothread_class_init(ObjectClass *klass, void *class_data)
+static void iothread_class_init(ObjectClass *klass, const void *class_data)
 {
     EventLoopBaseClass *bc = EVENT_LOOP_BASE_CLASS(klass);
 
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 99811af5e7..fbfdec2f17 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -12,6 +12,7 @@
 #include "exec/page-protection.h"
 #include "exec/mmap-lock.h"
 #include "exec/translation-block.h"
+#include "exec/tswap.h"
 #include "user/guest-base.h"
 #include "user-internals.h"
 #include "signal-common.h"
@@ -2122,9 +2123,12 @@ static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
     memcpy(to, from, n);
 }
 
-#if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN
 static void bswap_ehdr(struct elfhdr *ehdr)
 {
+    if (!target_needs_bswap()) {
+        return;
+    }
+
     bswap16s(&ehdr->e_type);            /* Object file type */
     bswap16s(&ehdr->e_machine);         /* Architecture */
     bswap32s(&ehdr->e_version);         /* Object file version */
@@ -2142,8 +2146,11 @@ static void bswap_ehdr(struct elfhdr *ehdr)
 
 static void bswap_phdr(struct elf_phdr *phdr, int phnum)
 {
-    int i;
-    for (i = 0; i < phnum; ++i, ++phdr) {
+    if (!target_needs_bswap()) {
+        return;
+    }
+
+    for (int i = 0; i < phnum; ++i, ++phdr) {
         bswap32s(&phdr->p_type);        /* Segment type */
         bswap32s(&phdr->p_flags);       /* Segment flags */
         bswaptls(&phdr->p_offset);      /* Segment file offset */
@@ -2157,8 +2164,11 @@ static void bswap_phdr(struct elf_phdr *phdr, int phnum)
 
 static void bswap_shdr(struct elf_shdr *shdr, int shnum)
 {
-    int i;
-    for (i = 0; i < shnum; ++i, ++shdr) {
+    if (!target_needs_bswap()) {
+        return;
+    }
+
+    for (int i = 0; i < shnum; ++i, ++shdr) {
         bswap32s(&shdr->sh_name);
         bswap32s(&shdr->sh_type);
         bswaptls(&shdr->sh_flags);
@@ -2174,6 +2184,10 @@ static void bswap_shdr(struct elf_shdr *shdr, int shnum)
 
 static void bswap_sym(struct elf_sym *sym)
 {
+    if (!target_needs_bswap()) {
+        return;
+    }
+
     bswap32s(&sym->st_name);
     bswaptls(&sym->st_value);
     bswaptls(&sym->st_size);
@@ -2183,6 +2197,10 @@ static void bswap_sym(struct elf_sym *sym)
 #ifdef TARGET_MIPS
 static void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags)
 {
+    if (!target_needs_bswap()) {
+        return;
+    }
+
     bswap16s(&abiflags->version);
     bswap32s(&abiflags->ases);
     bswap32s(&abiflags->isa_ext);
@@ -2190,15 +2208,6 @@ static void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags)
     bswap32s(&abiflags->flags2);
 }
 #endif
-#else
-static inline void bswap_ehdr(struct elfhdr *ehdr) { }
-static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
-static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
-static inline void bswap_sym(struct elf_sym *sym) { }
-#ifdef TARGET_MIPS
-static inline void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags) { }
-#endif
-#endif
 
 #ifdef USE_ELF_CORE_DUMP
 static int elf_core_dump(int, const CPUArchState *);
@@ -3144,11 +3153,11 @@ static bool parse_elf_properties(const ImageSource *src,
      * The contents of a valid PT_GNU_PROPERTY is a sequence of uint32_t.
      * Swap most of them now, beyond the header and namesz.
      */
-#if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN
-    for (int i = 4; i < n / 4; i++) {
-        bswap32s(note.data + i);
+    if (target_needs_bswap()) {
+        for (int i = 4; i < n / 4; i++) {
+            bswap32s(note.data + i);
+        }
     }
-#endif
 
     /*
      * Note that nhdr is 3 words, and that the "name" described by namesz
@@ -4000,9 +4009,12 @@ struct target_elf_prpsinfo {
     char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
 };
 
-#if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN
 static void bswap_prstatus(struct target_elf_prstatus *prstatus)
 {
+    if (!target_needs_bswap()) {
+        return;
+    }
+
     prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
     prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
     prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
@@ -4020,6 +4032,10 @@ static void bswap_prstatus(struct target_elf_prstatus *prstatus)
 
 static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
 {
+    if (!target_needs_bswap()) {
+        return;
+    }
+
     psinfo->pr_flag = tswapal(psinfo->pr_flag);
     psinfo->pr_uid = tswap16(psinfo->pr_uid);
     psinfo->pr_gid = tswap16(psinfo->pr_gid);
@@ -4031,15 +4047,14 @@ static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
 
 static void bswap_note(struct elf_note *en)
 {
+    if (!target_needs_bswap()) {
+        return;
+    }
+
     bswap32s(&en->n_namesz);
     bswap32s(&en->n_descsz);
     bswap32s(&en->n_type);
 }
-#else
-static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
-static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
-static inline void bswap_note(struct elf_note *en) { }
-#endif /* HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN */
 
 /*
  * Calculate file (dump) size of given memory region.
diff --git a/meson.build b/meson.build
index bcb9d39a38..8ae70dbe45 100644
--- a/meson.build
+++ b/meson.build
@@ -2185,20 +2185,24 @@ if not has_malloc_trim and get_option('malloc_trim').enabled()
   endif
 endif
 
-gnu_source_prefix = '''
+osdep_prefix = '''
   #ifndef _GNU_SOURCE
   #define _GNU_SOURCE
   #endif
+
+  #include <stddef.h>
+  #include <sys/types.h>
+
+  #include <string.h>
+  #include <limits.h>
+  /* Put unistd.h before time.h as that triggers localtime_r/gmtime_r
+   * function availability on recentish Mingw-w64 platforms. */
+  #include <unistd.h>
+  #include <time.h>
+  #include <errno.h>
+  #include <fcntl.h>
 '''
 
-# Check whether the glibc provides STATX_BASIC_STATS
-
-has_statx = cc.has_header_symbol('sys/stat.h', 'STATX_BASIC_STATS', prefix: gnu_source_prefix)
-
-# Check whether statx() provides mount ID information
-
-has_statx_mnt_id = cc.has_header_symbol('sys/stat.h', 'STATX_MNT_ID', prefix: gnu_source_prefix)
-
 have_vhost_user_blk_server = get_option('vhost_user_blk_server') \
   .require(host_os == 'linux',
            error_message: 'vhost_user_blk_server requires linux') \
@@ -2560,8 +2564,6 @@ config_host_data.set('CONFIG_CRYPTO_SM3', crypto_sm3.found())
 config_host_data.set('CONFIG_HOGWEED', hogweed.found())
 config_host_data.set('CONFIG_QEMU_PRIVATE_XTS', xts == 'private')
 config_host_data.set('CONFIG_MALLOC_TRIM', has_malloc_trim)
-config_host_data.set('CONFIG_STATX', has_statx)
-config_host_data.set('CONFIG_STATX_MNT_ID', has_statx_mnt_id)
 config_host_data.set('CONFIG_ZSTD', zstd.found())
 config_host_data.set('CONFIG_QPL', qpl.found())
 config_host_data.set('CONFIG_UADK', uadk.found())
@@ -2635,7 +2637,6 @@ config_host_data.set('CONFIG_CLOCK_ADJTIME', cc.has_function('clock_adjtime'))
 config_host_data.set('CONFIG_DUP3', cc.has_function('dup3'))
 config_host_data.set('CONFIG_FALLOCATE', cc.has_function('fallocate'))
 config_host_data.set('CONFIG_POSIX_FALLOCATE', cc.has_function('posix_fallocate'))
-config_host_data.set('CONFIG_GETCPU', cc.has_function('getcpu', prefix: gnu_source_prefix))
 config_host_data.set('CONFIG_SCHED_GETCPU', cc.has_function('sched_getcpu', prefix: '#include <sched.h>'))
 # Note that we need to specify prefix: here to avoid incorrectly
 # thinking that Windows has posix_memalign()
@@ -2657,7 +2658,7 @@ config_host_data.set('HAVE_GETIFADDRS', cc.has_function('getifaddrs'))
 config_host_data.set('HAVE_GLIB_WITH_SLICE_ALLOCATOR', glib_has_gslice)
 config_host_data.set('HAVE_GLIB_WITH_ALIGNED_ALLOC', glib_has_aligned_alloc)
 config_host_data.set('HAVE_OPENPTY', cc.has_function('openpty', dependencies: util))
-config_host_data.set('HAVE_STRCHRNUL', cc.has_function('strchrnul'))
+config_host_data.set('HAVE_STRCHRNUL', cc.has_function('strchrnul', prefix: osdep_prefix))
 config_host_data.set('HAVE_SYSTEM_FUNCTION', cc.has_function('system', prefix: '#include <stdlib.h>'))
 if rbd.found()
   config_host_data.set('HAVE_RBD_NAMESPACE_EXISTS',
@@ -2713,6 +2714,8 @@ config_host_data.set('CONFIG_FALLOCATE_ZERO_RANGE',
 config_host_data.set('CONFIG_FIEMAP',
                      cc.has_header('linux/fiemap.h') and
                      cc.has_header_symbol('linux/fs.h', 'FS_IOC_FIEMAP'))
+config_host_data.set('CONFIG_GETCPU',
+                     cc.has_header_symbol('sched.h', 'getcpu', prefix: osdep_prefix))
 config_host_data.set('CONFIG_GETRANDOM',
                      cc.has_function('getrandom') and
                      cc.has_header_symbol('sys/random.h', 'GRND_NONBLOCK'))
@@ -2757,8 +2760,7 @@ config_host_data.set('HAVE_UTMPX',
 config_host_data.set('CONFIG_EVENTFD', cc.links('''
   #include <sys/eventfd.h>
   int main(void) { return eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); }'''))
-config_host_data.set('CONFIG_FDATASYNC', cc.links(gnu_source_prefix + '''
-  #include <unistd.h>
+config_host_data.set('CONFIG_FDATASYNC', cc.links(osdep_prefix + '''
   int main(void) {
   #if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0
   return fdatasync(0);
@@ -2767,10 +2769,8 @@ config_host_data.set('CONFIG_FDATASYNC', cc.links(gnu_source_prefix + '''
   #endif
   }'''))
 
-has_madvise = cc.links(gnu_source_prefix + '''
-  #include <sys/types.h>
+has_madvise = cc.links(osdep_prefix + '''
   #include <sys/mman.h>
-  #include <stddef.h>
   int main(void) { return madvise(NULL, 0, MADV_DONTNEED); }''')
 missing_madvise_proto = false
 if has_madvise
@@ -2780,21 +2780,18 @@ if has_madvise
   # missing-prototype case, we try again with a definitely-bogus prototype.
   # This will only compile if the system headers don't provide the prototype;
   # otherwise the conflicting prototypes will cause a compiler error.
-  missing_madvise_proto = cc.links(gnu_source_prefix + '''
-    #include <sys/types.h>
+  missing_madvise_proto = cc.links(osdep_prefix + '''>
     #include <sys/mman.h>
-    #include <stddef.h>
     extern int madvise(int);
     int main(void) { return madvise(0); }''')
 endif
 config_host_data.set('CONFIG_MADVISE', has_madvise)
 config_host_data.set('HAVE_MADVISE_WITHOUT_PROTOTYPE', missing_madvise_proto)
 
-config_host_data.set('CONFIG_MEMFD', cc.links(gnu_source_prefix + '''
+config_host_data.set('CONFIG_MEMFD', cc.links(osdep_prefix + '''
   #include <sys/mman.h>
   int main(void) { return memfd_create("foo", MFD_ALLOW_SEALING); }'''))
-config_host_data.set('CONFIG_OPEN_BY_HANDLE', cc.links(gnu_source_prefix + '''
-  #include <fcntl.h>
+config_host_data.set('CONFIG_OPEN_BY_HANDLE', cc.links(osdep_prefix + '''
   #if !defined(AT_EMPTY_PATH)
   # error missing definition
   #else
@@ -2805,13 +2802,12 @@ config_host_data.set('CONFIG_OPEN_BY_HANDLE', cc.links(gnu_source_prefix + '''
 # i.e. errno is set and -1 is returned. That's not really how POSIX defines the
 # function. On the flip side, it has madvise() which is preferred anyways.
 if host_os != 'darwin'
-  config_host_data.set('CONFIG_POSIX_MADVISE', cc.links(gnu_source_prefix + '''
+  config_host_data.set('CONFIG_POSIX_MADVISE', cc.links(osdep_prefix + '''
     #include <sys/mman.h>
-    #include <stddef.h>
     int main(void) { return posix_madvise(NULL, 0, POSIX_MADV_DONTNEED); }'''))
 endif
 
-config_host_data.set('CONFIG_PTHREAD_SETNAME_NP_W_TID', cc.links(gnu_source_prefix + '''
+config_host_data.set('CONFIG_PTHREAD_SETNAME_NP_W_TID', cc.links(osdep_prefix + '''
   #include <pthread.h>
 
   static void *f(void *p) { return NULL; }
@@ -2822,7 +2818,7 @@ config_host_data.set('CONFIG_PTHREAD_SETNAME_NP_W_TID', cc.links(gnu_source_pref
     pthread_setname_np(thread, "QEMU");
     return 0;
   }''', dependencies: threads))
-config_host_data.set('CONFIG_PTHREAD_SETNAME_NP_WO_TID', cc.links(gnu_source_prefix + '''
+config_host_data.set('CONFIG_PTHREAD_SETNAME_NP_WO_TID', cc.links(osdep_prefix + '''
   #include <pthread.h>
 
   static void *f(void *p) { pthread_setname_np("QEMU"); return NULL; }
@@ -2832,7 +2828,7 @@ config_host_data.set('CONFIG_PTHREAD_SETNAME_NP_WO_TID', cc.links(gnu_source_pre
     pthread_create(&thread, 0, f, 0);
     return 0;
   }''', dependencies: threads))
-config_host_data.set('CONFIG_PTHREAD_SET_NAME_NP', cc.links(gnu_source_prefix + '''
+config_host_data.set('CONFIG_PTHREAD_SET_NAME_NP', cc.links(osdep_prefix + '''
   #include <pthread.h>
   #include <pthread_np.h>
 
@@ -2844,9 +2840,8 @@ config_host_data.set('CONFIG_PTHREAD_SET_NAME_NP', cc.links(gnu_source_prefix +
     pthread_set_name_np(thread, "QEMU");
     return 0;
   }''', dependencies: threads))
-config_host_data.set('CONFIG_PTHREAD_CONDATTR_SETCLOCK', cc.links(gnu_source_prefix + '''
+config_host_data.set('CONFIG_PTHREAD_CONDATTR_SETCLOCK', cc.links(osdep_prefix + '''
   #include <pthread.h>
-  #include <time.h>
 
   int main(void)
   {
@@ -2855,7 +2850,7 @@ config_host_data.set('CONFIG_PTHREAD_CONDATTR_SETCLOCK', cc.links(gnu_source_pre
     pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
     return 0;
   }''', dependencies: threads))
-config_host_data.set('CONFIG_PTHREAD_AFFINITY_NP', cc.links(gnu_source_prefix + '''
+config_host_data.set('CONFIG_PTHREAD_AFFINITY_NP', cc.links(osdep_prefix + '''
   #include <pthread.h>
 
   static void *f(void *p) { return NULL; }
@@ -2872,15 +2867,10 @@ config_host_data.set('CONFIG_PTHREAD_AFFINITY_NP', cc.links(gnu_source_prefix +
     CPU_FREE(cpuset);
     return 0;
   }''', dependencies: threads))
-config_host_data.set('CONFIG_SIGNALFD', cc.links(gnu_source_prefix + '''
+config_host_data.set('CONFIG_SIGNALFD', cc.links(osdep_prefix + '''
   #include <sys/signalfd.h>
-  #include <stddef.h>
   int main(void) { return signalfd(-1, NULL, SFD_CLOEXEC); }'''))
-config_host_data.set('CONFIG_SPLICE', cc.links(gnu_source_prefix + '''
-  #include <unistd.h>
-  #include <fcntl.h>
-  #include <limits.h>
-
+config_host_data.set('CONFIG_SPLICE', cc.links(osdep_prefix + '''
   int main(void)
   {
     int len, fd = 0;
@@ -2889,13 +2879,13 @@ config_host_data.set('CONFIG_SPLICE', cc.links(gnu_source_prefix + '''
     return 0;
   }'''))
 
-config_host_data.set('HAVE_MLOCKALL', cc.links(gnu_source_prefix + '''
+config_host_data.set('HAVE_MLOCKALL', cc.links(osdep_prefix + '''
   #include <sys/mman.h>
   int main(void) {
     return mlockall(MCL_FUTURE);
   }'''))
 
-config_host_data.set('HAVE_MLOCK_ONFAULT', cc.links(gnu_source_prefix + '''
+config_host_data.set('HAVE_MLOCK_ONFAULT', cc.links(osdep_prefix + '''
   #include <sys/mman.h>
   int main(void) {
       return mlockall(MCL_FUTURE | MCL_ONFAULT);
@@ -2904,7 +2894,7 @@ config_host_data.set('HAVE_MLOCK_ONFAULT', cc.links(gnu_source_prefix + '''
 have_l2tpv3 = false
 if get_option('l2tpv3').allowed() and have_system
   have_l2tpv3 = cc.has_type('struct mmsghdr',
-    prefix: gnu_source_prefix + '''
+    prefix: osdep_prefix + '''
       #include <sys/socket.h>
       #include <linux/ip.h>''')
 endif
@@ -3020,13 +3010,13 @@ if has_int128_type
   endif
 endif
 
-config_host_data.set('CONFIG_GETAUXVAL', cc.links(gnu_source_prefix + '''
+config_host_data.set('CONFIG_GETAUXVAL', cc.links(osdep_prefix + '''
   #include <sys/auxv.h>
   int main(void) {
     return getauxval(AT_HWCAP) == 0;
   }'''))
 
-config_host_data.set('CONFIG_ELF_AUX_INFO', cc.links(gnu_source_prefix + '''
+config_host_data.set('CONFIG_ELF_AUX_INFO', cc.links(osdep_prefix + '''
   #include <sys/auxv.h>
   int main(void) {
     unsigned long hwcap = 0;
@@ -3139,9 +3129,7 @@ config_host_data.set('CONFIG_MEMBARRIER', get_option('membarrier') \
   .allowed())
 
 have_afalg = get_option('crypto_afalg') \
-  .require(cc.compiles(gnu_source_prefix + '''
-    #include <errno.h>
-    #include <sys/types.h>
+  .require(cc.compiles(osdep_prefix + '''
     #include <sys/socket.h>
     #include <linux/if_alg.h>
     int main(void) {
@@ -3807,6 +3795,9 @@ endif
 common_ss.add(pagevary)
 specific_ss.add(files('page-target.c', 'page-vary-target.c'))
 
+common_ss.add(files('target-info.c'))
+specific_ss.add(files('target-info-stub.c'))
+
 subdir('backends')
 subdir('disas')
 subdir('migration')
diff --git a/migration/channel-block.c b/migration/channel-block.c
index b0477f5b6d..97de5a691b 100644
--- a/migration/channel-block.c
+++ b/migration/channel-block.c
@@ -170,7 +170,7 @@ qio_channel_block_set_aio_fd_handler(QIOChannel *ioc,
 
 static void
 qio_channel_block_class_init(ObjectClass *klass,
-                             void *class_data G_GNUC_UNUSED)
+                             const void *class_data G_GNUC_UNUSED)
 {
     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 
diff --git a/migration/migration.c b/migration/migration.c
index d46e776e24..55ec4bfab6 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -4016,7 +4016,7 @@ fail:
     migration_cleanup(s);
 }
 
-static void migration_class_init(ObjectClass *klass, void *data)
+static void migration_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
diff --git a/migration/rdma.c b/migration/rdma.c
index d9603ab603..b31652baac 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -3985,7 +3985,7 @@ static void qio_channel_rdma_finalize(Object *obj)
 }
 
 static void qio_channel_rdma_class_init(ObjectClass *klass,
-                                        void *class_data G_GNUC_UNUSED)
+                                        const void *class_data G_GNUC_UNUSED)
 {
     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 
diff --git a/net/can/can_core.c b/net/can/can_core.c
index 0115d78794..77fe2b8ba4 100644
--- a/net/can/can_core.c
+++ b/net/can/can_core.c
@@ -149,7 +149,7 @@ static bool can_bus_can_be_deleted(UserCreatable *uc)
 }
 
 static void can_bus_class_init(ObjectClass *klass,
-                                void *class_data G_GNUC_UNUSED)
+                               const void *class_data G_GNUC_UNUSED)
 {
     UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass);
 
@@ -162,7 +162,7 @@ static const TypeInfo can_bus_info = {
     .instance_size = sizeof(CanBusState),
     .instance_init = can_bus_instance_init,
     .class_init = can_bus_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/net/can/can_host.c b/net/can/can_host.c
index b2fe553f91..3f9bb33e47 100644
--- a/net/can/can_host.c
+++ b/net/can/can_host.c
@@ -72,7 +72,7 @@ static void can_host_complete(UserCreatable *uc, Error **errp)
 }
 
 static void can_host_class_init(ObjectClass *klass,
-                                void *class_data G_GNUC_UNUSED)
+                                const void *class_data G_GNUC_UNUSED)
 {
     UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass);
 
@@ -92,7 +92,7 @@ static const TypeInfo can_host_info = {
     .class_size = sizeof(CanHostClass),
     .abstract = true,
     .class_init = can_host_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/net/can/can_socketcan.c b/net/can/can_socketcan.c
index c1a1ad0563..8a57ae0717 100644
--- a/net/can/can_socketcan.c
+++ b/net/can/can_socketcan.c
@@ -308,7 +308,7 @@ static void can_host_socketcan_instance_init(Object *obj)
 }
 
 static void can_host_socketcan_class_init(ObjectClass *klass,
-                                          void *class_data G_GNUC_UNUSED)
+                                          const void *class_data G_GNUC_UNUSED)
 {
     CanHostClass *chc = CAN_HOST_CLASS(klass);
 
diff --git a/net/colo-compare.c b/net/colo-compare.c
index 893beed528..0e1844ee4c 100644
--- a/net/colo-compare.c
+++ b/net/colo-compare.c
@@ -1352,7 +1352,7 @@ static void colo_flush_packets(void *opaque, void *user_data)
     }
 }
 
-static void colo_compare_class_init(ObjectClass *oc, void *data)
+static void colo_compare_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -1476,7 +1476,7 @@ static const TypeInfo colo_compare_info = {
     .instance_finalize = colo_compare_finalize,
     .class_size = sizeof(CompareClass),
     .class_init = colo_compare_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/net/dump.c b/net/dump.c
index 140215aa10..581234b775 100644
--- a/net/dump.c
+++ b/net/dump.c
@@ -234,7 +234,7 @@ static void filter_dump_instance_finalize(Object *obj)
     g_free(nfds->filename);
 }
 
-static void filter_dump_class_init(ObjectClass *oc, void *data)
+static void filter_dump_class_init(ObjectClass *oc, const void *data)
 {
     NetFilterClass *nfc = NETFILTER_CLASS(oc);
 
diff --git a/net/filter-buffer.c b/net/filter-buffer.c
index 283dc9cbe6..a36be31dc8 100644
--- a/net/filter-buffer.c
+++ b/net/filter-buffer.c
@@ -172,7 +172,7 @@ static void filter_buffer_set_interval(Object *obj, Visitor *v,
     s->interval = value;
 }
 
-static void filter_buffer_class_init(ObjectClass *oc, void *data)
+static void filter_buffer_class_init(ObjectClass *oc, const void *data)
 {
     NetFilterClass *nfc = NETFILTER_CLASS(oc);
 
diff --git a/net/filter-mirror.c b/net/filter-mirror.c
index 34a63b5dbb..27734c91a7 100644
--- a/net/filter-mirror.c
+++ b/net/filter-mirror.c
@@ -410,7 +410,7 @@ static void filter_redirector_set_vnet_hdr(Object *obj,
     s->vnet_hdr = value;
 }
 
-static void filter_mirror_class_init(ObjectClass *oc, void *data)
+static void filter_mirror_class_init(ObjectClass *oc, const void *data)
 {
     NetFilterClass *nfc = NETFILTER_CLASS(oc);
 
@@ -425,7 +425,7 @@ static void filter_mirror_class_init(ObjectClass *oc, void *data)
     nfc->receive_iov = filter_mirror_receive_iov;
 }
 
-static void filter_redirector_class_init(ObjectClass *oc, void *data)
+static void filter_redirector_class_init(ObjectClass *oc, const void *data)
 {
     NetFilterClass *nfc = NETFILTER_CLASS(oc);
 
diff --git a/net/filter-replay.c b/net/filter-replay.c
index 81b71afe35..451663c5a5 100644
--- a/net/filter-replay.c
+++ b/net/filter-replay.c
@@ -65,7 +65,7 @@ static void filter_replay_instance_finalize(Object *obj)
     replay_unregister_net(nfrs->rns);
 }
 
-static void filter_replay_class_init(ObjectClass *oc, void *data)
+static void filter_replay_class_init(ObjectClass *oc, const void *data)
 {
     NetFilterClass *nfc = NETFILTER_CLASS(oc);
 
diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c
index c18c4c2019..cdf85aa5ee 100644
--- a/net/filter-rewriter.c
+++ b/net/filter-rewriter.c
@@ -411,7 +411,7 @@ static void filter_rewriter_init(Object *obj)
     s->failover_mode = FAILOVER_MODE_OFF;
 }
 
-static void colo_rewriter_class_init(ObjectClass *oc, void *data)
+static void colo_rewriter_class_init(ObjectClass *oc, const void *data)
 {
     NetFilterClass *nfc = NETFILTER_CLASS(oc);
 
diff --git a/net/filter.c b/net/filter.c
index 3335908771..c7cc6615dc 100644
--- a/net/filter.c
+++ b/net/filter.c
@@ -333,7 +333,7 @@ static void default_handle_event(NetFilterState *nf, int event, Error **errp)
     }
 }
 
-static void netfilter_class_init(ObjectClass *oc, void *data)
+static void netfilter_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
     NetFilterClass *nfc = NETFILTER_CLASS(oc);
@@ -363,7 +363,7 @@ static const TypeInfo netfilter_info = {
     .instance_size = sizeof(NetFilterState),
     .instance_init = netfilter_init,
     .instance_finalize = netfilter_finalize,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/pc-bios/bamboo.dtb b/pc-bios/dtb/bamboo.dtb
similarity index 100%
rename from pc-bios/bamboo.dtb
rename to pc-bios/dtb/bamboo.dtb
diff --git a/pc-bios/bamboo.dts b/pc-bios/dtb/bamboo.dts
similarity index 100%
rename from pc-bios/bamboo.dts
rename to pc-bios/dtb/bamboo.dts
diff --git a/pc-bios/canyonlands.dtb b/pc-bios/dtb/canyonlands.dtb
similarity index 100%
rename from pc-bios/canyonlands.dtb
rename to pc-bios/dtb/canyonlands.dtb
diff --git a/pc-bios/canyonlands.dts b/pc-bios/dtb/canyonlands.dts
similarity index 100%
rename from pc-bios/canyonlands.dts
rename to pc-bios/dtb/canyonlands.dts
diff --git a/pc-bios/dtb/meson.build b/pc-bios/dtb/meson.build
new file mode 100644
index 0000000000..7a71835bca
--- /dev/null
+++ b/pc-bios/dtb/meson.build
@@ -0,0 +1,23 @@
+dtbs = [
+  'bamboo.dtb',
+  'canyonlands.dtb',
+  'petalogix-ml605.dtb',
+  'petalogix-s3adsp1800.dtb',
+]
+
+dtc = find_program('dtc', required: false)
+if dtc.found()
+  foreach out : dtbs
+    f = fs.replace_suffix(out, '.dts')
+    custom_target(f,
+        build_by_default: have_system,
+        input: files(f),
+        output: out,
+        install: get_option('install_blobs'),
+        install_dir: qemu_datadir / 'dtb',
+        command: [ dtc, '-q', '-I', 'dts', '-O', 'dtb',
+                        '-o', '@OUTPUT@', '@INPUT0@' ])
+  endforeach
+else
+    install_data(dtbs, install_dir: qemu_datadir / 'dtb')
+endif
diff --git a/pc-bios/petalogix-ml605.dtb b/pc-bios/dtb/petalogix-ml605.dtb
similarity index 100%
rename from pc-bios/petalogix-ml605.dtb
rename to pc-bios/dtb/petalogix-ml605.dtb
diff --git a/pc-bios/petalogix-ml605.dts b/pc-bios/dtb/petalogix-ml605.dts
similarity index 100%
rename from pc-bios/petalogix-ml605.dts
rename to pc-bios/dtb/petalogix-ml605.dts
diff --git a/pc-bios/petalogix-s3adsp1800.dtb b/pc-bios/dtb/petalogix-s3adsp1800.dtb
similarity index 100%
rename from pc-bios/petalogix-s3adsp1800.dtb
rename to pc-bios/dtb/petalogix-s3adsp1800.dtb
diff --git a/pc-bios/petalogix-s3adsp1800.dts b/pc-bios/dtb/petalogix-s3adsp1800.dts
similarity index 100%
rename from pc-bios/petalogix-s3adsp1800.dts
rename to pc-bios/dtb/petalogix-s3adsp1800.dts
diff --git a/pc-bios/meson.build b/pc-bios/meson.build
index 34d6616c32..34d8cc4f33 100644
--- a/pc-bios/meson.build
+++ b/pc-bios/meson.build
@@ -86,31 +86,10 @@ blobs = [
   'vof-nvram.bin',
 ]
 
-dtc = find_program('dtc', required: false)
-foreach f : [
-  'bamboo.dts',
-  'canyonlands.dts',
-  'petalogix-s3adsp1800.dts',
-  'petalogix-ml605.dts',
-]
-  out = fs.replace_suffix(f, '.dtb')
-  if dtc.found()
-    custom_target(f,
-        build_by_default: have_system,
-        input: files(f),
-        output: out,
-        install: get_option('install_blobs'),
-        install_dir: qemu_datadir,
-        command: [ dtc, '-q', '-I', 'dts', '-O', 'dtb',
-                        '-o', '@OUTPUT@', '@INPUT0@' ])
-  else
-    blobs += out
-  endif
-endforeach
-
 if get_option('install_blobs')
   install_data(blobs, install_dir: qemu_datadir)
 endif
 
 subdir('descriptors')
+subdir('dtb')
 subdir('keymaps')
diff --git a/plugins/loader.c b/plugins/loader.c
index 0d6e082e17..8f0d75c904 100644
--- a/plugins/loader.c
+++ b/plugins/loader.c
@@ -29,7 +29,7 @@
 #include "qemu/xxhash.h"
 #include "qemu/plugin.h"
 #include "qemu/memalign.h"
-#include "hw/core/cpu.h"
+#include "qemu/target-info.h"
 #include "exec/tb-flush.h"
 
 #include "plugin.h"
diff --git a/qapi/machine.json b/qapi/machine.json
index a9ff807631..c8feb9fe17 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -275,15 +275,15 @@
 { 'command': 'query-current-machine', 'returns': 'CurrentMachineParams' }
 
 ##
-# @TargetInfo:
+# @QemuTargetInfo:
 #
-# Information describing the QEMU target.
+# Information on the target configuration built into the QEMU binary.
 #
 # @arch: the target architecture
 #
 # Since: 1.2
 ##
-{ 'struct': 'TargetInfo',
+{ 'struct': 'QemuTargetInfo',
   'data': { 'arch': 'SysEmuTarget' } }
 
 ##
@@ -291,11 +291,11 @@
 #
 # Return information about the target for this QEMU
 #
-# Returns: TargetInfo
+# Returns: QemuTargetInfo
 #
 # Since: 1.2
 ##
-{ 'command': 'query-target', 'returns': 'TargetInfo' }
+{ 'command': 'query-target', 'returns': 'QemuTargetInfo' }
 
 ##
 # @UuidInfo:
diff --git a/qemu.nsi b/qemu.nsi
index b186f223e1..d419986ca0 100644
--- a/qemu.nsi
+++ b/qemu.nsi
@@ -204,7 +204,6 @@ Section "Uninstall"
     Delete "$INSTDIR\*.bmp"
     Delete "$INSTDIR\*.bin"
     Delete "$INSTDIR\*.dll"
-    Delete "$INSTDIR\*.dtb"
     Delete "$INSTDIR\*.fd"
     Delete "$INSTDIR\*.img"
     Delete "$INSTDIR\*.lid"
@@ -215,6 +214,7 @@ Section "Uninstall"
     Delete "$INSTDIR\qemu-io.exe"
     Delete "$INSTDIR\qemu.exe"
     Delete "$INSTDIR\qemu-system-*.exe"
+    RMDir /r "$INSTDIR\dtb"
     RMDir /r "$INSTDIR\doc"
     RMDir /r "$INSTDIR\share"
     ; Remove generated files
diff --git a/qom/object.c b/qom/object.c
index 01618d06bd..664f0f24ae 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -54,10 +54,10 @@ struct TypeImpl
     size_t instance_size;
     size_t instance_align;
 
-    void (*class_init)(ObjectClass *klass, void *data);
-    void (*class_base_init)(ObjectClass *klass, void *data);
+    void (*class_init)(ObjectClass *klass, const void *data);
+    void (*class_base_init)(ObjectClass *klass, const void *data);
 
-    void *class_data;
+    const void *class_data;
 
     void (*instance_init)(Object *obj);
     void (*instance_post_init)(Object *obj);
@@ -1191,7 +1191,7 @@ GSList *object_class_get_list(const char *implements_type,
     return list;
 }
 
-static gint object_class_cmp(gconstpointer a, gconstpointer b)
+static gint object_class_cmp(gconstpointer a, gconstpointer b, gpointer d)
 {
     return strcasecmp(object_class_get_name((ObjectClass *)a),
                       object_class_get_name((ObjectClass *)b));
@@ -1200,8 +1200,9 @@ static gint object_class_cmp(gconstpointer a, gconstpointer b)
 GSList *object_class_get_list_sorted(const char *implements_type,
                                      bool include_abstract)
 {
-    return g_slist_sort(object_class_get_list(implements_type, include_abstract),
-                        object_class_cmp);
+    return g_slist_sort_with_data(
+        object_class_get_list(implements_type, include_abstract),
+        object_class_cmp, NULL);
 }
 
 Object *object_ref(void *objptr)
@@ -2891,7 +2892,7 @@ void object_class_property_set_description(ObjectClass *klass,
     op->description = g_strdup(description);
 }
 
-static void object_class_init(ObjectClass *klass, void *data)
+static void object_class_init(ObjectClass *klass, const void *data)
 {
     object_class_property_add_str(klass, "type", object_get_type,
                                   NULL);
diff --git a/rust/qemu-api/src/qom.rs b/rust/qemu-api/src/qom.rs
index 34d7bc0ef9..f1b4022157 100644
--- a/rust/qemu-api/src/qom.rs
+++ b/rust/qemu-api/src/qom.rs
@@ -227,7 +227,7 @@ unsafe extern "C" fn rust_instance_post_init<T: ObjectImpl>(obj: *mut bindings::
 
 unsafe extern "C" fn rust_class_init<T: ObjectType + ObjectImpl>(
     klass: *mut ObjectClass,
-    _data: *mut c_void,
+    _data: *const c_void,
 ) {
     let mut klass = NonNull::new(klass)
         .unwrap()
@@ -492,7 +492,7 @@ pub trait ObjectImpl: ObjectType + IsA<Object> {
     /// the effects of copying the contents of the parent's class struct
     /// to the descendants.
     const CLASS_BASE_INIT: Option<
-        unsafe extern "C" fn(klass: *mut ObjectClass, data: *mut c_void),
+        unsafe extern "C" fn(klass: *mut ObjectClass, data: *const c_void),
     > = None;
 
     const TYPE_INFO: TypeInfo = TypeInfo {
@@ -513,8 +513,8 @@ pub trait ObjectImpl: ObjectType + IsA<Object> {
         class_size: core::mem::size_of::<Self::Class>(),
         class_init: Some(rust_class_init::<Self>),
         class_base_init: Self::CLASS_BASE_INIT,
-        class_data: core::ptr::null_mut(),
-        interfaces: core::ptr::null_mut(),
+        class_data: core::ptr::null(),
+        interfaces: core::ptr::null(),
     };
 
     // methods on ObjectClass
diff --git a/scripts/codeconverter/codeconverter/qom_type_info.py b/scripts/codeconverter/codeconverter/qom_type_info.py
index f92c3a4730..22a2556076 100644
--- a/scripts/codeconverter/codeconverter/qom_type_info.py
+++ b/scripts/codeconverter/codeconverter/qom_type_info.py
@@ -798,7 +798,8 @@ class RedundantTypeSizes(TypeInfoVar):
 #
 #
 #            if 'class_init' not in fields:
-#                yield self.prepend(('static void %s_class_init(ObjectClass *oc, void *data)\n'
+#                yield self.prepend(('static void %s_class_init(ObjectClass *oc,\n'
+#                                                              'const void *data)\n'
 #                                    '{\n'
 #                                    '}\n\n') % (ids.lowercase))
 #                yield self.append_field('class_init', ids.lowercase+'_class_init')
diff --git a/scripts/codeconverter/codeconverter/test_regexps.py b/scripts/codeconverter/codeconverter/test_regexps.py
index 7211392796..4526268ae8 100644
--- a/scripts/codeconverter/codeconverter/test_regexps.py
+++ b/scripts/codeconverter/codeconverter/test_regexps.py
@@ -70,15 +70,15 @@ static const TypeInfo char_file_type_info = {
             .name = armsse_variants[i].name,
             .parent = TYPE_ARMSSE,
             .class_init = armsse_class_init,
-            .class_data = (void *)&armsse_variants[i],
+            .class_data = &armsse_variants[i],
         };''', re.MULTILINE)
 
     print(RE_ARRAY_ITEM)
     assert fullmatch(RE_ARRAY_ITEM, '{ TYPE_HOTPLUG_HANDLER },')
     assert fullmatch(RE_ARRAY_ITEM, '{ TYPE_ACPI_DEVICE_IF },')
     assert fullmatch(RE_ARRAY_ITEM, '{ }')
-    assert fullmatch(RE_ARRAY_CAST, '(InterfaceInfo[])')
-    assert fullmatch(RE_ARRAY, '''(InterfaceInfo[]) {
+    assert fullmatch(RE_ARRAY_CAST, '(const InterfaceInfo[])')
+    assert fullmatch(RE_ARRAY, '''(const InterfaceInfo[]) {
             { TYPE_HOTPLUG_HANDLER },
             { TYPE_ACPI_DEVICE_IF },
             { }
@@ -98,7 +98,7 @@ static const TypeInfo char_file_type_info = {
         .parent = TYPE_DEVICE,
         .instance_size = sizeof(CRBState),
         .class_init  = tpm_crb_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { TYPE_TPM_IF },
             { }
         }
@@ -134,7 +134,7 @@ static const TypeInfo char_file_type_info = {
         .instance_size = sizeof(AcpiGedState),
         .instance_init  = acpi_ged_initfn,
         .class_init    = acpi_ged_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { TYPE_HOTPLUG_HANDLER },
             { TYPE_ACPI_DEVICE_IF },
             { }
@@ -164,7 +164,7 @@ static const TypeInfo char_file_type_info = {
         .parent = TYPE_DEVICE,
         .instance_size = sizeof(CRBState),
         .class_init  = tpm_crb_class_init,
-        .interfaces = (InterfaceInfo[]) {
+        .interfaces = (const InterfaceInfo[]) {
             { TYPE_TPM_IF },
             { }
         }
diff --git a/scsi/pr-manager-helper.c b/scsi/pr-manager-helper.c
index 3be52a98d5..6b86f01b01 100644
--- a/scsi/pr-manager-helper.c
+++ b/scsi/pr-manager-helper.c
@@ -300,7 +300,7 @@ static void pr_manager_helper_instance_init(Object *obj)
 }
 
 static void pr_manager_helper_class_init(ObjectClass *klass,
-                                         void *class_data G_GNUC_UNUSED)
+                                         const void *class_data G_GNUC_UNUSED)
 {
     PRManagerClass *prmgr_klass = PR_MANAGER_CLASS(klass);
     UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass);
diff --git a/scsi/pr-manager.c b/scsi/pr-manager.c
index 1977d99ce0..40e1210eb2 100644
--- a/scsi/pr-manager.c
+++ b/scsi/pr-manager.c
@@ -77,7 +77,7 @@ static const TypeInfo pr_manager_info = {
     .name = TYPE_PR_MANAGER,
     .class_size = sizeof(PRManagerClass),
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/system/datadir.c b/system/datadir.c
index c9237cb5d4..f96f8fc264 100644
--- a/system/datadir.c
+++ b/system/datadir.c
@@ -30,7 +30,7 @@
 static const char *data_dir[16];
 static int data_dir_idx;
 
-char *qemu_find_file(int type, const char *name)
+char *qemu_find_file(QemuFileType type, const char *name)
 {
     int i;
     const char *subdir;
@@ -46,6 +46,9 @@ char *qemu_find_file(int type, const char *name)
     case QEMU_FILE_TYPE_BIOS:
         subdir = "";
         break;
+    case QEMU_FILE_TYPE_DTB:
+        subdir = "dtb/";
+        break;
     case QEMU_FILE_TYPE_KEYMAP:
         subdir = "keymaps/";
         break;
diff --git a/system/memory-internal.h b/system/memory-internal.h
index 085e81a9fe..46f758fa7e 100644
--- a/system/memory-internal.h
+++ b/system/memory-internal.h
@@ -41,11 +41,8 @@ void mtree_print_dispatch(struct AddressSpaceDispatch *d,
 /* returns true if end is big endian. */
 static inline bool devend_big_endian(enum device_endian end)
 {
-    QEMU_BUILD_BUG_ON(DEVICE_HOST_ENDIAN != DEVICE_LITTLE_ENDIAN &&
-                      DEVICE_HOST_ENDIAN != DEVICE_BIG_ENDIAN);
-
     if (end == DEVICE_NATIVE_ENDIAN) {
-        return target_words_bigendian();
+        return target_big_endian();
     }
     return end == DEVICE_BIG_ENDIAN;
 }
diff --git a/system/memory.c b/system/memory.c
index 7e2f16f4e9..71434e7ad0 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -1382,7 +1382,7 @@ static void memory_region_ram_device_write(void *opaque, hwaddr addr,
 static const MemoryRegionOps ram_device_mem_ops = {
     .read = memory_region_ram_device_read,
     .write = memory_region_ram_device_write,
-    .endianness = DEVICE_HOST_ENDIAN,
+    .endianness = HOST_BIG_ENDIAN ? DEVICE_BIG_ENDIAN : DEVICE_LITTLE_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 8,
@@ -2575,7 +2575,7 @@ void memory_region_add_eventfd(MemoryRegion *mr,
     unsigned i;
 
     if (size) {
-        MemOp mop = (target_words_bigendian() ? MO_BE : MO_LE) | size_memop(size);
+        MemOp mop = (target_big_endian() ? MO_BE : MO_LE) | size_memop(size);
         adjust_endianness(mr, &mrfd.data, mop);
     }
     memory_region_transaction_begin();
@@ -2611,7 +2611,7 @@ void memory_region_del_eventfd(MemoryRegion *mr,
     unsigned i;
 
     if (size) {
-        MemOp mop = (target_words_bigendian() ? MO_BE : MO_LE) | size_memop(size);
+        MemOp mop = (target_big_endian() ? MO_BE : MO_LE) | size_memop(size);
         adjust_endianness(mr, &mrfd.data, mop);
     }
     memory_region_transaction_begin();
diff --git a/system/qtest.c b/system/qtest.c
index 523a047995..301b03be2d 100644
--- a/system/qtest.c
+++ b/system/qtest.c
@@ -693,7 +693,7 @@ static void qtest_process_command(CharBackend *chr, gchar **words)
 
         qtest_send(chr, "OK\n");
     } else if (strcmp(words[0], "endianness") == 0) {
-        if (target_words_bigendian()) {
+        if (target_big_endian()) {
             qtest_sendf(chr, "OK big\n");
         } else {
             qtest_sendf(chr, "OK little\n");
@@ -994,7 +994,7 @@ static char *qtest_get_chardev(Object *obj, Error **errp)
     return g_strdup(q->chr_name);
 }
 
-static void qtest_class_init(ObjectClass *oc, void *data)
+static void qtest_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -1012,7 +1012,7 @@ static const TypeInfo qtest_info = {
     .parent = TYPE_OBJECT,
     .class_init = qtest_class_init,
     .instance_size = sizeof(QTest),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/system/vl.c b/system/vl.c
index c17945c493..520956f4a1 100644
--- a/system/vl.c
+++ b/system/vl.c
@@ -40,6 +40,7 @@
 #include "qemu/help_option.h"
 #include "qemu/hw-version.h"
 #include "qemu/uuid.h"
+#include "qemu/target-info.h"
 #include "system/reset.h"
 #include "system/runstate.h"
 #include "system/runstate-action.h"
@@ -79,7 +80,6 @@
 #include "hw/block/block.h"
 #include "hw/i386/x86.h"
 #include "hw/i386/pc.h"
-#include "hw/core/cpu.h"
 #include "migration/cpr.h"
 #include "migration/misc.h"
 #include "migration/snapshot.h"
@@ -1524,7 +1524,7 @@ static bool debugcon_parse(const char *devname, Error **errp)
     return true;
 }
 
-static gint machine_class_cmp(gconstpointer a, gconstpointer b)
+static gint machine_class_cmp(gconstpointer a, gconstpointer b, gpointer d)
 {
     const MachineClass *mc1 = a, *mc2 = b;
     int res;
@@ -1574,7 +1574,7 @@ static void machine_help_func(const QDict *qdict)
     }
 
     printf("Supported machines are:\n");
-    machines = g_slist_sort(machines, machine_class_cmp);
+    machines = g_slist_sort_with_data(machines, machine_class_cmp, NULL);
     for (el = machines; el; el = el->next) {
         MachineClass *mc = el->data;
         if (mc->alias) {
diff --git a/target-info-stub.c b/target-info-stub.c
new file mode 100644
index 0000000000..773a10188c
--- /dev/null
+++ b/target-info-stub.c
@@ -0,0 +1,26 @@
+/*
+ * QEMU target info stubs (target specific)
+ *
+ *  Copyright (c) Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/target-info.h"
+#include "qemu/target-info-impl.h"
+#include "cpu.h"
+
+static const TargetInfo target_info_stub = {
+    .target_name = TARGET_NAME,
+};
+
+const TargetInfo *target_info(void)
+{
+    return &target_info_stub;
+}
+
+const char *target_cpu_type(void)
+{
+    return CPU_RESOLVING_TYPE;
+}
diff --git a/target-info.c b/target-info.c
new file mode 100644
index 0000000000..84b18931e7
--- /dev/null
+++ b/target-info.c
@@ -0,0 +1,16 @@
+/*
+ * QEMU target info helpers
+ *
+ *  Copyright (c) Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/target-info.h"
+#include "qemu/target-info-impl.h"
+
+const char *target_name(void)
+{
+    return target_info()->target_name;
+}
diff --git a/target/alpha/cpu.c b/target/alpha/cpu.c
index 35fb145d27..27e2008a4e 100644
--- a/target/alpha/cpu.c
+++ b/target/alpha/cpu.c
@@ -258,7 +258,7 @@ static const TCGCPUOps alpha_tcg_ops = {
 #endif /* !CONFIG_USER_ONLY */
 };
 
-static void alpha_cpu_class_init(ObjectClass *oc, void *data)
+static void alpha_cpu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 377791c84d..5e951675c6 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -2649,12 +2649,29 @@ static const gchar *arm_gdb_arch_name(CPUState *cs)
     ARMCPU *cpu = ARM_CPU(cs);
     CPUARMState *env = &cpu->env;
 
+    if (arm_gdbstub_is_aarch64(cpu)) {
+        return "aarch64";
+    }
     if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
         return "iwmmxt";
     }
     return "arm";
 }
 
+static const char *arm_gdb_get_core_xml_file(CPUState *cs)
+{
+    ARMCPU *cpu = ARM_CPU(cs);
+    CPUARMState *env = &cpu->env;
+
+    if (arm_gdbstub_is_aarch64(cpu)) {
+        return "aarch64-core.xml";
+    }
+    if (arm_feature(env, ARM_FEATURE_M)) {
+        return "arm-m-profile.xml";
+    }
+    return "arm-core.xml";
+}
+
 #ifndef CONFIG_USER_ONLY
 #include "hw/core/sysemu-cpu-ops.h"
 
@@ -2699,7 +2716,7 @@ static const TCGCPUOps arm_tcg_ops = {
 };
 #endif /* CONFIG_TCG */
 
-static void arm_cpu_class_init(ObjectClass *oc, void *data)
+static void arm_cpu_class_init(ObjectClass *oc, const void *data)
 {
     ARMCPUClass *acc = ARM_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(acc);
@@ -2724,6 +2741,7 @@ static void arm_cpu_class_init(ObjectClass *oc, void *data)
     cc->sysemu_ops = &arm_sysemu_ops;
 #endif
     cc->gdb_arch_name = arm_gdb_arch_name;
+    cc->gdb_get_core_xml_file = arm_gdb_get_core_xml_file;
     cc->gdb_stop_before_watchpoint = true;
     cc->disas_set_info = arm_disas_set_info;
 
@@ -2740,13 +2758,12 @@ static void arm_cpu_instance_init(Object *obj)
     arm_cpu_post_init(obj);
 }
 
-static void cpu_register_class_init(ObjectClass *oc, void *data)
+static void cpu_register_class_init(ObjectClass *oc, const void *data)
 {
     ARMCPUClass *acc = ARM_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(acc);
 
     acc->info = data;
-    cc->gdb_core_xml_file = "arm-core.xml";
     if (acc->info->deprecation_note) {
         cc->deprecation_note = acc->info->deprecation_note;
     }
@@ -2758,7 +2775,7 @@ void arm_cpu_register(const ARMCPUInfo *info)
         .parent = TYPE_ARM_CPU,
         .instance_init = arm_cpu_instance_init,
         .class_init = info->class_init ?: cpu_register_class_init,
-        .class_data = (void *)info,
+        .class_data = info,
     };
 
     type_info.name = g_strdup_printf("%s-" TYPE_ARM_CPU, info->name);
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 3705b34285..fdcf8cd1ae 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1123,7 +1123,7 @@ typedef struct ARMCPUInfo {
     const char *name;
     const char *deprecation_note;
     void (*initfn)(Object *obj);
-    void (*class_init)(ObjectClass *oc, void *data);
+    void (*class_init)(ObjectClass *oc, const void *data);
 } ARMCPUInfo;
 
 /**
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 8188ede5cc..00629a5d1d 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -813,20 +813,8 @@ static void aarch64_cpu_finalizefn(Object *obj)
 {
 }
 
-static const gchar *aarch64_gdb_arch_name(CPUState *cs)
+static void aarch64_cpu_class_init(ObjectClass *oc, const void *data)
 {
-    return "aarch64";
-}
-
-static void aarch64_cpu_class_init(ObjectClass *oc, void *data)
-{
-    CPUClass *cc = CPU_CLASS(oc);
-
-    cc->gdb_read_register = aarch64_cpu_gdb_read_register;
-    cc->gdb_write_register = aarch64_cpu_gdb_write_register;
-    cc->gdb_core_xml_file = "aarch64-core.xml";
-    cc->gdb_arch_name = aarch64_gdb_arch_name;
-
     object_class_property_add_bool(oc, "aarch64", aarch64_cpu_get_aarch64,
                                    aarch64_cpu_set_aarch64);
     object_class_property_set_description(oc, "aarch64",
@@ -842,7 +830,7 @@ static void aarch64_cpu_instance_init(Object *obj)
     arm_cpu_post_init(obj);
 }
 
-static void cpu_register_class_init(ObjectClass *oc, void *data)
+static void cpu_register_class_init(ObjectClass *oc, const void *data)
 {
     ARMCPUClass *acc = ARM_CPU_CLASS(oc);
 
@@ -855,7 +843,7 @@ void aarch64_cpu_register(const ARMCPUInfo *info)
         .parent = TYPE_AARCH64_CPU,
         .instance_init = aarch64_cpu_instance_init,
         .class_init = info->class_init ?: cpu_register_class_init,
-        .class_data = (void *)info,
+        .class_data = info,
     };
 
     type_info.name = g_strdup_printf("%s-" TYPE_ARM_CPU, info->name);
diff --git a/target/arm/gdbstub.c b/target/arm/gdbstub.c
index 30068c2262..ce4497ad7c 100644
--- a/target/arm/gdbstub.c
+++ b/target/arm/gdbstub.c
@@ -44,6 +44,12 @@ int arm_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
     ARMCPU *cpu = ARM_CPU(cs);
     CPUARMState *env = &cpu->env;
 
+#ifdef TARGET_AARCH64
+    if (arm_gdbstub_is_aarch64(cpu)) {
+        return aarch64_cpu_gdb_read_register(cs, mem_buf, n);
+    }
+#endif
+
     if (n < 16) {
         /* Core integer register.  */
         return gdb_get_reg32(mem_buf, env->regs[n]);
@@ -66,6 +72,12 @@ int arm_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
     CPUARMState *env = &cpu->env;
     uint32_t tmp;
 
+#ifdef TARGET_AARCH64
+    if (arm_gdbstub_is_aarch64(cpu)) {
+        return aarch64_cpu_gdb_write_register(cs, mem_buf, n);
+    }
+#endif
+
     tmp = ldl_p(mem_buf);
 
     /*
diff --git a/target/arm/hyp_gdbstub.c b/target/arm/hyp_gdbstub.c
index 1e861263b3..0512d67f8c 100644
--- a/target/arm/hyp_gdbstub.c
+++ b/target/arm/hyp_gdbstub.c
@@ -125,7 +125,7 @@ int delete_hw_breakpoint(target_ulong pc)
  * need to ensure you mask the address as required and set BAS=0xff
  */
 
-int insert_hw_watchpoint(target_ulong addr, target_ulong len, int type)
+int insert_hw_watchpoint(vaddr addr, vaddr len, int type)
 {
     HWWatchpoint wp = {
         .wcr = R_DBGWCR_E_MASK, /* E=1, enable */
@@ -182,7 +182,7 @@ int insert_hw_watchpoint(target_ulong addr, target_ulong len, int type)
     return 0;
 }
 
-bool check_watchpoint_in_range(int i, target_ulong addr)
+bool check_watchpoint_in_range(int i, vaddr addr)
 {
     HWWatchpoint *wp = get_hw_wp(i);
     uint64_t addr_top, addr_bottom = wp->wvr;
@@ -214,7 +214,7 @@ bool check_watchpoint_in_range(int i, target_ulong addr)
  * Delete a breakpoint and shuffle any above down
  */
 
-int delete_hw_watchpoint(target_ulong addr, target_ulong len, int type)
+int delete_hw_watchpoint(vaddr addr, vaddr len, int type)
 {
     int i;
     for (i = 0; i < cur_hw_wps; i++) {
@@ -239,7 +239,7 @@ bool find_hw_breakpoint(CPUState *cpu, target_ulong pc)
     return false;
 }
 
-CPUWatchpoint *find_hw_watchpoint(CPUState *cpu, target_ulong addr)
+CPUWatchpoint *find_hw_watchpoint(CPUState *cpu, vaddr addr)
 {
     int i;
 
diff --git a/target/arm/internals.h b/target/arm/internals.h
index d24acdd672..4d3d84ffeb 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -25,6 +25,8 @@
 #ifndef TARGET_ARM_INTERNALS_H
 #define TARGET_ARM_INTERNALS_H
 
+#include "exec/hwaddr.h"
+#include "exec/vaddr.h"
 #include "exec/breakpoint.h"
 #include "hw/registerfields.h"
 #include "tcg/tcg-gvec-desc.h"
@@ -726,8 +728,8 @@ typedef struct ARMMMUFaultInfo ARMMMUFaultInfo;
 struct ARMMMUFaultInfo {
     ARMFaultType type;
     ARMGPCF gpcf;
-    target_ulong s2addr;
-    target_ulong paddr;
+    hwaddr s2addr;
+    hwaddr paddr;
     ARMSecuritySpace paddr_space;
     int level;
     int domain;
@@ -1826,6 +1828,12 @@ void aarch64_add_pauth_properties(Object *obj);
 void aarch64_add_sve_properties(Object *obj);
 void aarch64_add_sme_properties(Object *obj);
 
+/* Return true if the gdbstub is presenting an AArch64 CPU */
+static inline bool arm_gdbstub_is_aarch64(ARMCPU *cpu)
+{
+    return object_dynamic_cast(OBJECT(cpu), TYPE_AARCH64_CPU);
+}
+
 /* Read the CONTROL register as the MRS instruction would. */
 uint32_t arm_v7m_mrs_control(CPUARMState *env, uint32_t secure);
 
@@ -1945,10 +1953,10 @@ bool find_hw_breakpoint(CPUState *cpu, target_ulong pc);
 int insert_hw_breakpoint(target_ulong pc);
 int delete_hw_breakpoint(target_ulong pc);
 
-bool check_watchpoint_in_range(int i, target_ulong addr);
-CPUWatchpoint *find_hw_watchpoint(CPUState *cpu, target_ulong addr);
-int insert_hw_watchpoint(target_ulong addr, target_ulong len, int type);
-int delete_hw_watchpoint(target_ulong addr, target_ulong len, int type);
+bool check_watchpoint_in_range(int i, vaddr addr);
+CPUWatchpoint *find_hw_watchpoint(CPUState *cpu, vaddr addr);
+int insert_hw_watchpoint(vaddr addr, vaddr len, int type);
+int delete_hw_watchpoint(vaddr addr, vaddr len, int type);
 
 /* Return the current value of the system counter in ticks */
 uint64_t gt_get_countervalue(CPUARMState *env);
diff --git a/target/arm/tcg/cpu-v7m.c b/target/arm/tcg/cpu-v7m.c
index f71560aa43..b34b657857 100644
--- a/target/arm/tcg/cpu-v7m.c
+++ b/target/arm/tcg/cpu-v7m.c
@@ -259,14 +259,13 @@ static const TCGCPUOps arm_v7m_tcg_ops = {
 #endif /* !CONFIG_USER_ONLY */
 };
 
-static void arm_v7m_class_init(ObjectClass *oc, void *data)
+static void arm_v7m_class_init(ObjectClass *oc, const void *data)
 {
     ARMCPUClass *acc = ARM_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
 
     acc->info = data;
     cc->tcg_ops = &arm_v7m_tcg_ops;
-    cc->gdb_core_xml_file = "arm-m-profile.xml";
 }
 
 static const ARMCPUInfo arm_v7m_cpus[] = {
diff --git a/target/avr/cpu.c b/target/avr/cpu.c
index 84f3b839c9..3f261c6fec 100644
--- a/target/avr/cpu.c
+++ b/target/avr/cpu.c
@@ -237,7 +237,7 @@ static const TCGCPUOps avr_tcg_ops = {
     .do_interrupt = avr_cpu_do_interrupt,
 };
 
-static void avr_cpu_class_init(ObjectClass *oc, void *data)
+static void avr_cpu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
diff --git a/target/hexagon/cpu.c b/target/hexagon/cpu.c
index 3c5191282e..a5d31c33bd 100644
--- a/target/hexagon/cpu.c
+++ b/target/hexagon/cpu.c
@@ -335,7 +335,7 @@ static const TCGCPUOps hexagon_tcg_ops = {
     .mmu_index = hexagon_cpu_mmu_index,
 };
 
-static void hexagon_cpu_class_init(ObjectClass *c, void *data)
+static void hexagon_cpu_class_init(ObjectClass *c, const void *data)
 {
     HexagonCPUClass *mcc = HEXAGON_CPU_CLASS(c);
     CPUClass *cc = CPU_CLASS(c);
diff --git a/target/hexagon/genptr.c b/target/hexagon/genptr.c
index 2c5e15cfcf..08fc5413de 100644
--- a/target/hexagon/genptr.c
+++ b/target/hexagon/genptr.c
@@ -329,14 +329,14 @@ void gen_set_byte_i64(int N, TCGv_i64 result, TCGv src)
 
 static inline void gen_load_locked4u(TCGv dest, TCGv vaddr, int mem_index)
 {
-    tcg_gen_qemu_ld_tl(dest, vaddr, mem_index, MO_TEUL);
+    tcg_gen_qemu_ld_tl(dest, vaddr, mem_index, MO_LE | MO_UL);
     tcg_gen_mov_tl(hex_llsc_addr, vaddr);
     tcg_gen_mov_tl(hex_llsc_val, dest);
 }
 
 static inline void gen_load_locked8u(TCGv_i64 dest, TCGv vaddr, int mem_index)
 {
-    tcg_gen_qemu_ld_i64(dest, vaddr, mem_index, MO_TEUQ);
+    tcg_gen_qemu_ld_i64(dest, vaddr, mem_index, MO_LE | MO_UQ);
     tcg_gen_mov_tl(hex_llsc_addr, vaddr);
     tcg_gen_mov_i64(hex_llsc_val_i64, dest);
 }
@@ -756,7 +756,7 @@ static void gen_load_frame(DisasContext *ctx, TCGv_i64 frame, TCGv EA)
 {
     Insn *insn = ctx->insn;  /* Needed for CHECK_NOSHUF */
     CHECK_NOSHUF(EA, 8);
-    tcg_gen_qemu_ld_i64(frame, EA, ctx->mem_idx, MO_TEUQ);
+    tcg_gen_qemu_ld_i64(frame, EA, ctx->mem_idx, MO_LE | MO_UQ);
 }
 
 #ifndef CONFIG_HEXAGON_IDEF_PARSER
@@ -1230,7 +1230,7 @@ static void gen_vreg_load(DisasContext *ctx, intptr_t dstoff, TCGv src,
         tcg_gen_andi_tl(src, src, ~((int32_t)sizeof(MMVector) - 1));
     }
     for (int i = 0; i < sizeof(MMVector) / 8; i++) {
-        tcg_gen_qemu_ld_i64(tmp, src, ctx->mem_idx, MO_TEUQ);
+        tcg_gen_qemu_ld_i64(tmp, src, ctx->mem_idx, MO_LE | MO_UQ);
         tcg_gen_addi_tl(src, src, 8);
         tcg_gen_st_i64(tmp, tcg_env, dstoff + i * 8);
     }
diff --git a/target/hexagon/idef-parser/parser-helpers.c b/target/hexagon/idef-parser/parser-helpers.c
index a7dcd85fe4..542af8d0a6 100644
--- a/target/hexagon/idef-parser/parser-helpers.c
+++ b/target/hexagon/idef-parser/parser-helpers.c
@@ -1761,7 +1761,7 @@ void gen_load(Context *c, YYLTYPE *locp, HexValue *width,
     if (signedness == SIGNED) {
         OUT(c, locp, " | MO_SIGN");
     }
-    OUT(c, locp, " | MO_TE);\n");
+    OUT(c, locp, " | MO_LE);\n");
 }
 
 void gen_store(Context *c, YYLTYPE *locp, HexValue *width, HexValue *ea,
diff --git a/target/hexagon/macros.h b/target/hexagon/macros.h
index ee3d4c88e7..9ba9be408d 100644
--- a/target/hexagon/macros.h
+++ b/target/hexagon/macros.h
@@ -21,6 +21,7 @@
 #include "cpu.h"
 #include "hex_regs.h"
 #include "reg_fields.h"
+#include "accel/tcg/getpc.h"
 
 #define GET_FIELD(FIELD, REGIN) \
     fEXTRACTU_BITS(REGIN, reg_field_info[FIELD].width, \
@@ -115,27 +116,27 @@
 #define MEM_LOAD2s(DST, VA) \
     do { \
         CHECK_NOSHUF(VA, 2); \
-        tcg_gen_qemu_ld_tl(DST, VA, ctx->mem_idx, MO_TESW); \
+        tcg_gen_qemu_ld_tl(DST, VA, ctx->mem_idx, MO_LE | MO_SW); \
     } while (0)
 #define MEM_LOAD2u(DST, VA) \
     do { \
         CHECK_NOSHUF(VA, 2); \
-        tcg_gen_qemu_ld_tl(DST, VA, ctx->mem_idx, MO_TEUW); \
+        tcg_gen_qemu_ld_tl(DST, VA, ctx->mem_idx, MO_LE | MO_UW); \
     } while (0)
 #define MEM_LOAD4s(DST, VA) \
     do { \
         CHECK_NOSHUF(VA, 4); \
-        tcg_gen_qemu_ld_tl(DST, VA, ctx->mem_idx, MO_TESL); \
+        tcg_gen_qemu_ld_tl(DST, VA, ctx->mem_idx, MO_LE | MO_SL); \
     } while (0)
 #define MEM_LOAD4u(DST, VA) \
     do { \
         CHECK_NOSHUF(VA, 4); \
-        tcg_gen_qemu_ld_tl(DST, VA, ctx->mem_idx, MO_TEUL); \
+        tcg_gen_qemu_ld_tl(DST, VA, ctx->mem_idx, MO_LE | MO_UL); \
     } while (0)
 #define MEM_LOAD8u(DST, VA) \
     do { \
         CHECK_NOSHUF(VA, 8); \
-        tcg_gen_qemu_ld_i64(DST, VA, ctx->mem_idx, MO_TEUQ); \
+        tcg_gen_qemu_ld_i64(DST, VA, ctx->mem_idx, MO_LE | MO_UQ); \
     } while (0)
 
 #define MEM_STORE1_FUNC(X) \
diff --git a/target/hexagon/mmvec/macros.h b/target/hexagon/mmvec/macros.h
index bcd4a1e897..c1a88392c0 100644
--- a/target/hexagon/mmvec/macros.h
+++ b/target/hexagon/mmvec/macros.h
@@ -21,6 +21,7 @@
 #include "qemu/host-utils.h"
 #include "arch.h"
 #include "mmvec/system_ext_mmvec.h"
+#include "accel/tcg/getpc.h"
 
 #ifndef QEMU_GENERATE
 #define VdV      (*(MMVector *restrict)(VdV_void))
diff --git a/target/hexagon/translate.c b/target/hexagon/translate.c
index dd26801e64..02fd40c160 100644
--- a/target/hexagon/translate.c
+++ b/target/hexagon/translate.c
@@ -656,17 +656,17 @@ void process_store(DisasContext *ctx, int slot_num)
         case 2:
             tcg_gen_qemu_st_tl(hex_store_val32[slot_num],
                                hex_store_addr[slot_num],
-                               ctx->mem_idx, MO_TEUW);
+                               ctx->mem_idx, MO_LE | MO_UW);
             break;
         case 4:
             tcg_gen_qemu_st_tl(hex_store_val32[slot_num],
                                hex_store_addr[slot_num],
-                               ctx->mem_idx, MO_TEUL);
+                               ctx->mem_idx, MO_LE | MO_UL);
             break;
         case 8:
             tcg_gen_qemu_st_i64(hex_store_val64[slot_num],
                                 hex_store_addr[slot_num],
-                                ctx->mem_idx, MO_TEUQ);
+                                ctx->mem_idx, MO_LE | MO_UQ);
             break;
         default:
             {
diff --git a/target/hppa/cpu.c b/target/hppa/cpu.c
index 10e18c945e..b792cb247a 100644
--- a/target/hppa/cpu.c
+++ b/target/hppa/cpu.c
@@ -278,7 +278,7 @@ static const TCGCPUOps hppa_tcg_ops = {
 #endif /* !CONFIG_USER_ONLY */
 };
 
-static void hppa_cpu_class_init(ObjectClass *oc, void *data)
+static void hppa_cpu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
diff --git a/target/i386/confidential-guest.c b/target/i386/confidential-guest.c
index b3727845ad..cfb71bf034 100644
--- a/target/i386/confidential-guest.c
+++ b/target/i386/confidential-guest.c
@@ -20,7 +20,7 @@ OBJECT_DEFINE_ABSTRACT_TYPE(X86ConfidentialGuest,
                             X86_CONFIDENTIAL_GUEST,
                             CONFIDENTIAL_GUEST_SUPPORT)
 
-static void x86_confidential_guest_class_init(ObjectClass *oc, void *data)
+static void x86_confidential_guest_class_init(ObjectClass *oc, const void *data)
 {
 }
 
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 1f970aa4da..6f21d5ed22 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -5703,7 +5703,7 @@ static void max_x86_cpu_realize(DeviceState *dev, Error **errp)
     x86_cpu_realizefn(dev, errp);
 }
 
-static void max_x86_cpu_class_init(ObjectClass *oc, void *data)
+static void max_x86_cpu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     X86CPUClass *xcc = X86_CPU_CLASS(oc);
@@ -6319,7 +6319,7 @@ static void x86_cpu_list_entry(gpointer data, gpointer user_data)
 }
 
 /* list available CPU models and flags */
-void x86_cpu_list(void)
+static void x86_cpu_list(void)
 {
     int i, j;
     GSList *list;
@@ -6702,7 +6702,7 @@ static const gchar *x86_gdb_arch_name(CPUState *cs)
 #endif
 }
 
-static void x86_cpu_cpudef_class_init(ObjectClass *oc, void *data)
+static void x86_cpu_cpudef_class_init(ObjectClass *oc, const void *data)
 {
     const X86CPUModel *model = data;
     X86CPUClass *xcc = X86_CPU_CLASS(oc);
@@ -8886,7 +8886,7 @@ static const struct SysemuCPUOps i386_sysemu_ops = {
 };
 #endif
 
-static void x86_cpu_common_class_init(ObjectClass *oc, void *data)
+static void x86_cpu_common_class_init(ObjectClass *oc, const void *data)
 {
     X86CPUClass *xcc = X86_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
@@ -8905,6 +8905,7 @@ static void x86_cpu_common_class_init(ObjectClass *oc, void *data)
     cc->reset_dump_flags = CPU_DUMP_FPU | CPU_DUMP_CCOP;
 
     cc->class_by_name = x86_cpu_class_by_name;
+    cc->list_cpus = x86_cpu_list;
     cc->parse_features = x86_cpu_parse_featurestr;
     cc->dump_state = x86_cpu_dump_state;
     cc->set_pc = x86_cpu_set_pc;
@@ -8985,7 +8986,7 @@ static const TypeInfo x86_cpu_type_info = {
 };
 
 /* "base" CPU model, used by query-cpu-model-expansion */
-static void x86_cpu_base_class_init(ObjectClass *oc, void *data)
+static void x86_cpu_base_class_init(ObjectClass *oc, const void *data)
 {
     X86CPUClass *xcc = X86_CPU_CLASS(oc);
 
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 9866595cd0..54bf9639f1 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -2365,7 +2365,6 @@ int x86_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
 int x86_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 void x86_cpu_gdb_init(CPUState *cs);
 
-void x86_cpu_list(void);
 int cpu_x86_support_mca_broadcast(CPUX86State *env);
 
 #ifndef CONFIG_USER_ONLY
@@ -2559,8 +2558,6 @@ uint64_t cpu_get_tsc(CPUX86State *env);
 #define TARGET_DEFAULT_CPU_TYPE X86_CPU_TYPE_NAME("qemu32")
 #endif
 
-#define cpu_list x86_cpu_list
-
 /* MMU modes definitions */
 #define MMU_KSMAP64_IDX    0
 #define MMU_KSMAP32_IDX    1
diff --git a/target/i386/host-cpu.c b/target/i386/host-cpu.c
index 072731a4dd..a2d3830f5b 100644
--- a/target/i386/host-cpu.c
+++ b/target/i386/host-cpu.c
@@ -161,7 +161,7 @@ void host_cpu_max_instance_init(X86CPU *cpu)
                             &error_abort);
 }
 
-static void host_cpu_class_init(ObjectClass *oc, void *data)
+static void host_cpu_class_init(ObjectClass *oc, const void *data)
 {
     X86CPUClass *xcc = X86_CPU_CLASS(oc);
 
diff --git a/target/i386/hvf/hvf-cpu.c b/target/i386/hvf/hvf-cpu.c
index b5f4c80028..dfdda70126 100644
--- a/target/i386/hvf/hvf-cpu.c
+++ b/target/i386/hvf/hvf-cpu.c
@@ -74,7 +74,7 @@ static void hvf_cpu_instance_init(CPUState *cs)
     hvf_cpu_xsave_init();
 }
 
-static void hvf_cpu_accel_class_init(ObjectClass *oc, void *data)
+static void hvf_cpu_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
 
diff --git a/target/i386/kvm/kvm-cpu.c b/target/i386/kvm/kvm-cpu.c
index 6269fa8045..16bde4de01 100644
--- a/target/i386/kvm/kvm-cpu.c
+++ b/target/i386/kvm/kvm-cpu.c
@@ -223,7 +223,7 @@ static void kvm_cpu_instance_init(CPUState *cs)
     kvm_cpu_xsave_init();
 }
 
-static void kvm_cpu_accel_class_init(ObjectClass *oc, void *data)
+static void kvm_cpu_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
 
diff --git a/target/i386/nvmm/nvmm-accel-ops.c b/target/i386/nvmm/nvmm-accel-ops.c
index 4e4e63de78..21443078b7 100644
--- a/target/i386/nvmm/nvmm-accel-ops.c
+++ b/target/i386/nvmm/nvmm-accel-ops.c
@@ -81,7 +81,7 @@ static void nvmm_kick_vcpu_thread(CPUState *cpu)
     cpus_kick_thread(cpu);
 }
 
-static void nvmm_accel_ops_class_init(ObjectClass *oc, void *data)
+static void nvmm_accel_ops_class_init(ObjectClass *oc, const void *data)
 {
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
 
diff --git a/target/i386/nvmm/nvmm-all.c b/target/i386/nvmm/nvmm-all.c
index 17394d073d..f1c6120ccf 100644
--- a/target/i386/nvmm/nvmm-all.c
+++ b/target/i386/nvmm/nvmm-all.c
@@ -1200,7 +1200,7 @@ nvmm_enabled(void)
 }
 
 static void
-nvmm_accel_class_init(ObjectClass *oc, void *data)
+nvmm_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
     ac->name = "NVMM";
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 878dd20f2c..7ee700d6a3 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -2046,7 +2046,7 @@ static void sev_common_set_kernel_hashes(Object *obj, bool value, Error **errp)
 }
 
 static void
-sev_common_class_init(ObjectClass *oc, void *data)
+sev_common_class_init(ObjectClass *oc, const void *data)
 {
     ConfidentialGuestSupportClass *klass = CONFIDENTIAL_GUEST_SUPPORT_CLASS(oc);
 
@@ -2089,7 +2089,7 @@ static const TypeInfo sev_common_info = {
     .class_size = sizeof(SevCommonStateClass),
     .class_init = sev_common_class_init,
     .abstract = true,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
@@ -2141,7 +2141,7 @@ static void sev_guest_set_legacy_vm_type(Object *obj, Visitor *v,
 }
 
 static void
-sev_guest_class_init(ObjectClass *oc, void *data)
+sev_guest_class_init(ObjectClass *oc, const void *data)
 {
     SevCommonStateClass *klass = SEV_COMMON_CLASS(oc);
     X86ConfidentialGuestClass *x86_klass = X86_CONFIDENTIAL_GUEST_CLASS(oc);
@@ -2395,7 +2395,7 @@ sev_snp_guest_set_host_data(Object *obj, const char *value, Error **errp)
 }
 
 static void
-sev_snp_guest_class_init(ObjectClass *oc, void *data)
+sev_snp_guest_class_init(ObjectClass *oc, const void *data)
 {
     SevCommonStateClass *klass = SEV_COMMON_CLASS(oc);
     X86ConfidentialGuestClass *x86_klass = X86_CONFIDENTIAL_GUEST_CLASS(oc);
diff --git a/target/i386/tcg/emit.c.inc b/target/i386/tcg/emit.c.inc
index 4e09e96fc1..ca6bc2ea82 100644
--- a/target/i386/tcg/emit.c.inc
+++ b/target/i386/tcg/emit.c.inc
@@ -1813,7 +1813,7 @@ static void gen_CMPXCHG(DisasContext *s, X86DecodedInsn *decode)
 static void gen_CMPXCHG16B(DisasContext *s, X86DecodedInsn *decode)
 {
 #ifdef TARGET_X86_64
-    MemOp mop = MO_TE | MO_128 | MO_ALIGN;
+    MemOp mop = MO_LE | MO_128 | MO_ALIGN;
     TCGv_i64 t0, t1;
     TCGv_i128 cmp, val;
 
@@ -1870,10 +1870,10 @@ static void gen_CMPXCHG8B(DisasContext *s, X86DecodedInsn *decode)
 
     /* Only require atomic with LOCK; non-parallel handled in generator. */
     if (s->prefix & PREFIX_LOCK) {
-        tcg_gen_atomic_cmpxchg_i64(old, s->A0, cmp, val, s->mem_index, MO_TEUQ);
+        tcg_gen_atomic_cmpxchg_i64(old, s->A0, cmp, val, s->mem_index, MO_LEUQ);
     } else {
         tcg_gen_nonatomic_cmpxchg_i64(old, s->A0, cmp, val,
-                                      s->mem_index, MO_TEUQ);
+                                      s->mem_index, MO_LEUQ);
     }
 
     /* Compute the required value of Z. */
diff --git a/target/i386/tcg/tcg-cpu.c b/target/i386/tcg/tcg-cpu.c
index 621502c984..e53aaa31bf 100644
--- a/target/i386/tcg/tcg-cpu.c
+++ b/target/i386/tcg/tcg-cpu.c
@@ -193,7 +193,7 @@ static void x86_tcg_cpu_instance_init(CPUState *cs)
     x86_tcg_cpu_xsave_init();
 }
 
-static void x86_tcg_cpu_accel_class_init(ObjectClass *oc, void *data)
+static void x86_tcg_cpu_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
 
diff --git a/target/i386/whpx/whpx-accel-ops.c b/target/i386/whpx/whpx-accel-ops.c
index 81fdd06e48..b8bebe403c 100644
--- a/target/i386/whpx/whpx-accel-ops.c
+++ b/target/i386/whpx/whpx-accel-ops.c
@@ -83,7 +83,7 @@ static bool whpx_vcpu_thread_is_idle(CPUState *cpu)
     return !whpx_apic_in_platform();
 }
 
-static void whpx_accel_ops_class_init(ObjectClass *oc, void *data)
+static void whpx_accel_ops_class_init(ObjectClass *oc, const void *data)
 {
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
 
diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c
index 2e1c03b20e..cf6d3e4cdd 100644
--- a/target/i386/whpx/whpx-all.c
+++ b/target/i386/whpx/whpx-all.c
@@ -2698,7 +2698,7 @@ bool whpx_apic_in_platform(void) {
     return whpx_global.apic_in_platform;
 }
 
-static void whpx_accel_class_init(ObjectClass *oc, void *data)
+static void whpx_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
     ac->name = "WHPX";
diff --git a/target/i386/whpx/whpx-apic.c b/target/i386/whpx/whpx-apic.c
index 630a9616d7..e1ef6d4e6d 100644
--- a/target/i386/whpx/whpx-apic.c
+++ b/target/i386/whpx/whpx-apic.c
@@ -252,7 +252,7 @@ static void whpx_apic_realize(DeviceState *dev, Error **errp)
     msi_nonbroken = true;
 }
 
-static void whpx_apic_class_init(ObjectClass *klass, void *data)
+static void whpx_apic_class_init(ObjectClass *klass, const void *data)
 {
     APICCommonClass *k = APIC_COMMON_CLASS(klass);
 
diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index 0e6c89eb1b..8ad45b453d 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -908,7 +908,7 @@ static const Property loongarch_cpu_properties[] = {
     DEFINE_PROP_INT32("node-id", LoongArchCPU, node_id, CPU_UNSET_NUMA_NODE_ID),
 };
 
-static void loongarch_cpu_class_init(ObjectClass *c, void *data)
+static void loongarch_cpu_class_init(ObjectClass *c, const void *data)
 {
     LoongArchCPUClass *lacc = LOONGARCH_CPU_CLASS(c);
     CPUClass *cc = CPU_CLASS(c);
@@ -948,7 +948,7 @@ static const gchar *loongarch32_gdb_arch_name(CPUState *cs)
     return "loongarch32";
 }
 
-static void loongarch32_cpu_class_init(ObjectClass *c, void *data)
+static void loongarch32_cpu_class_init(ObjectClass *c, const void *data)
 {
     CPUClass *cc = CPU_CLASS(c);
 
@@ -961,7 +961,7 @@ static const gchar *loongarch64_gdb_arch_name(CPUState *cs)
     return "loongarch64";
 }
 
-static void loongarch64_cpu_class_init(ObjectClass *c, void *data)
+static void loongarch64_cpu_class_init(ObjectClass *c, const void *data)
 {
     CPUClass *cc = CPU_CLASS(c);
 
diff --git a/target/m68k/cpu.c b/target/m68k/cpu.c
index 99adc5eb91..6f33b86c7d 100644
--- a/target/m68k/cpu.c
+++ b/target/m68k/cpu.c
@@ -607,7 +607,7 @@ static const TCGCPUOps m68k_tcg_ops = {
 #endif /* !CONFIG_USER_ONLY */
 };
 
-static void m68k_cpu_class_init(ObjectClass *c, void *data)
+static void m68k_cpu_class_init(ObjectClass *c, const void *data)
 {
     M68kCPUClass *mcc = M68K_CPU_CLASS(c);
     CPUClass *cc = CPU_CLASS(c);
@@ -634,7 +634,7 @@ static void m68k_cpu_class_init(ObjectClass *c, void *data)
     cc->tcg_ops = &m68k_tcg_ops;
 }
 
-static void m68k_cpu_class_init_cf_core(ObjectClass *c, void *data)
+static void m68k_cpu_class_init_cf_core(ObjectClass *c, const void *data)
 {
     CPUClass *cc = CPU_CLASS(c);
 
@@ -649,7 +649,7 @@ static void m68k_cpu_class_init_cf_core(ObjectClass *c, void *data)
         .class_init = m68k_cpu_class_init_cf_core    \
     }
 
-static void m68k_cpu_class_init_m68k_core(ObjectClass *c, void *data)
+static void m68k_cpu_class_init_m68k_core(ObjectClass *c, const void *data)
 {
     CPUClass *cc = CPU_CLASS(c);
 
diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c
index edfb05758b..00a2730de4 100644
--- a/target/microblaze/cpu.c
+++ b/target/microblaze/cpu.c
@@ -447,7 +447,7 @@ static const TCGCPUOps mb_tcg_ops = {
 #endif /* !CONFIG_USER_ONLY */
 };
 
-static void mb_cpu_class_init(ObjectClass *oc, void *data)
+static void mb_cpu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
diff --git a/target/mips/cpu.c b/target/mips/cpu.c
index 473cecdebc..d13361a150 100644
--- a/target/mips/cpu.c
+++ b/target/mips/cpu.c
@@ -572,7 +572,7 @@ static const TCGCPUOps mips_tcg_ops = {
 };
 #endif /* CONFIG_TCG */
 
-static void mips_cpu_class_init(ObjectClass *c, void *data)
+static void mips_cpu_class_init(ObjectClass *c, const void *data)
 {
     MIPSCPUClass *mcc = MIPS_CPU_CLASS(c);
     CPUClass *cc = CPU_CLASS(c);
@@ -613,7 +613,7 @@ static const TypeInfo mips_cpu_type_info = {
     .class_init = mips_cpu_class_init,
 };
 
-static void mips_cpu_cpudef_class_init(ObjectClass *oc, void *data)
+static void mips_cpu_cpudef_class_init(ObjectClass *oc, const void *data)
 {
     MIPSCPUClass *mcc = MIPS_CPU_CLASS(oc);
     mcc->cpu_def = data;
@@ -626,7 +626,7 @@ static void mips_register_cpudef_type(const struct mips_def_t *def)
         .name = typename,
         .parent = TYPE_MIPS_CPU,
         .class_init = mips_cpu_cpudef_class_init,
-        .class_data = (void *)def,
+        .class_data = def,
     };
 
     type_register_static(&ti);
diff --git a/target/mips/tcg/mips16e_translate.c.inc b/target/mips/tcg/mips16e_translate.c.inc
index a9af8f1e74..97da3456ea 100644
--- a/target/mips/tcg/mips16e_translate.c.inc
+++ b/target/mips/tcg/mips16e_translate.c.inc
@@ -306,7 +306,7 @@ static void gen_mips16_restore(DisasContext *ctx,
     int astatic;
     TCGv t0 = tcg_temp_new();
 
-    gen_op_addr_addi(ctx, t0, cpu_gpr[29], -framesize);
+    gen_op_addr_addi(ctx, t0, cpu_gpr[29], framesize);
 
     if (do_ra) {
         decr_and_load(ctx, 31, t0);
@@ -386,7 +386,7 @@ static void gen_mips16_restore(DisasContext *ctx,
         }
     }
 
-    gen_op_addr_addi(ctx, cpu_gpr[29], cpu_gpr[29], -framesize);
+    gen_op_addr_addi(ctx, cpu_gpr[29], cpu_gpr[29], framesize);
 }
 
 #if defined(TARGET_MIPS64)
diff --git a/target/mips/tcg/msa_helper.c b/target/mips/tcg/msa_helper.c
index 14de4a71ff..e349344647 100644
--- a/target/mips/tcg/msa_helper.c
+++ b/target/mips/tcg/msa_helper.c
@@ -8212,7 +8212,6 @@ void helper_msa_ffint_u_df(CPUMIPSState *env, uint32_t df, uint32_t wd,
 /* Element-by-element access macros */
 #define DF_ELEMENTS(df) (MSA_WRLEN / DF_BITS(df))
 
-#if TARGET_BIG_ENDIAN
 static inline uint64_t bswap16x4(uint64_t x)
 {
     uint64_t m = 0x00ff00ff00ff00ffull;
@@ -8223,7 +8222,6 @@ static inline uint64_t bswap32x2(uint64_t x)
 {
     return ror64(bswap64(x), 32);
 }
-#endif
 
 void helper_msa_ld_b(CPUMIPSState *env, uint32_t wd,
                      target_ulong addr)
@@ -8252,10 +8250,10 @@ void helper_msa_ld_h(CPUMIPSState *env, uint32_t wd,
      */
     d0 = cpu_ldq_le_data_ra(env, addr + 0, ra);
     d1 = cpu_ldq_le_data_ra(env, addr + 8, ra);
-#if TARGET_BIG_ENDIAN
-    d0 = bswap16x4(d0);
-    d1 = bswap16x4(d1);
-#endif
+    if (mips_env_is_bigendian(env)) {
+        d0 = bswap16x4(d0);
+        d1 = bswap16x4(d1);
+    }
     pwd->d[0] = d0;
     pwd->d[1] = d1;
 }
@@ -8273,10 +8271,10 @@ void helper_msa_ld_w(CPUMIPSState *env, uint32_t wd,
      */
     d0 = cpu_ldq_le_data_ra(env, addr + 0, ra);
     d1 = cpu_ldq_le_data_ra(env, addr + 8, ra);
-#if TARGET_BIG_ENDIAN
-    d0 = bswap32x2(d0);
-    d1 = bswap32x2(d1);
-#endif
+    if (mips_env_is_bigendian(env)) {
+        d0 = bswap32x2(d0);
+        d1 = bswap32x2(d1);
+    }
     pwd->d[0] = d0;
     pwd->d[1] = d1;
 }
@@ -8339,10 +8337,10 @@ void helper_msa_st_h(CPUMIPSState *env, uint32_t wd,
     /* Store 8 bytes at a time.  See helper_msa_ld_h. */
     d0 = pwd->d[0];
     d1 = pwd->d[1];
-#if TARGET_BIG_ENDIAN
-    d0 = bswap16x4(d0);
-    d1 = bswap16x4(d1);
-#endif
+    if (mips_env_is_bigendian(env)) {
+        d0 = bswap16x4(d0);
+        d1 = bswap16x4(d1);
+    }
     cpu_stq_le_data_ra(env, addr + 0, d0, ra);
     cpu_stq_le_data_ra(env, addr + 8, d1, ra);
 }
@@ -8360,10 +8358,10 @@ void helper_msa_st_w(CPUMIPSState *env, uint32_t wd,
     /* Store 8 bytes at a time.  See helper_msa_ld_w. */
     d0 = pwd->d[0];
     d1 = pwd->d[1];
-#if TARGET_BIG_ENDIAN
-    d0 = bswap32x2(d0);
-    d1 = bswap32x2(d1);
-#endif
+    if (mips_env_is_bigendian(env)) {
+        d0 = bswap32x2(d0);
+        d1 = bswap32x2(d1);
+    }
     cpu_stq_le_data_ra(env, addr + 0, d0, ra);
     cpu_stq_le_data_ra(env, addr + 8, d1, ra);
 }
diff --git a/target/openrisc/cpu.c b/target/openrisc/cpu.c
index 6601e0c066..2ec267efec 100644
--- a/target/openrisc/cpu.c
+++ b/target/openrisc/cpu.c
@@ -260,7 +260,7 @@ static const TCGCPUOps openrisc_tcg_ops = {
 #endif /* !CONFIG_USER_ONLY */
 };
 
-static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
+static void openrisc_cpu_class_init(ObjectClass *oc, const void *data)
 {
     OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(occ);
diff --git a/target/ppc/cpu-models.c b/target/ppc/cpu-models.c
index ece3481781..ea86ea202a 100644
--- a/target/ppc/cpu-models.c
+++ b/target/ppc/cpu-models.c
@@ -35,7 +35,7 @@
 #define POWERPC_DEF_SVR(_name, _desc, _pvr, _svr, _type)                    \
     static void                                                             \
     glue(POWERPC_DEF_PREFIX(_pvr, _svr, _type), _cpu_class_init)            \
-    (ObjectClass *oc, void *data)                                           \
+    (ObjectClass *oc, const void *data)                                     \
     {                                                                       \
         DeviceClass *dc = DEVICE_CLASS(oc);                                 \
         PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);                       \
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 3c02f7f7d4..13115a89ff 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -1610,8 +1610,6 @@ void ppc_store_dawrx1(CPUPPCState *env, uint32_t value);
 #endif /* !defined(CONFIG_USER_ONLY) */
 void ppc_store_msr(CPUPPCState *env, target_ulong value);
 
-void ppc_cpu_list(void);
-
 /* Time-base and decrementer management */
 uint64_t cpu_ppc_load_tbl(CPUPPCState *env);
 uint32_t cpu_ppc_load_tbu(CPUPPCState *env);
@@ -1673,8 +1671,6 @@ static inline uint64_t ppc_dump_gpr(CPUPPCState *env, int gprn)
 int ppc_dcr_read(ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp);
 int ppc_dcr_write(ppc_dcr_t *dcr_env, int dcrn, uint32_t val);
 
-#define cpu_list ppc_cpu_list
-
 /* MMU modes definitions */
 #define MMU_USER_IDX 0
 static inline int ppc_env_mmu_index(CPUPPCState *env, bool ifetch)
@@ -3051,7 +3047,8 @@ static inline int check_attn_none(CPUPPCState *env)
 
 #define POWERPC_FAMILY(_name)                                               \
     static void                                                             \
-    glue(glue(ppc_, _name), _cpu_family_class_init)(ObjectClass *, void *); \
+    glue(glue(ppc_, _name), _cpu_family_class_init)(ObjectClass *,          \
+                                                    const void *);          \
                                                                             \
     static const TypeInfo                                                   \
     glue(glue(ppc_, _name), _cpu_family_type_info) = {                      \
diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index fde7d71fc6..b0973b6df9 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -2167,7 +2167,7 @@ static void init_proc_405(CPUPPCState *env)
     SET_WDT_PERIOD(16, 20, 24, 28);
 }
 
-POWERPC_FAMILY(405)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(405)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2235,7 +2235,7 @@ static void init_proc_440EP(CPUPPCState *env)
     SET_WDT_PERIOD(20, 24, 28, 32);
 }
 
-POWERPC_FAMILY(440EP)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(440EP)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2274,7 +2274,7 @@ POWERPC_FAMILY(440EP)(ObjectClass *oc, void *data)
                  POWERPC_FLAG_DE | POWERPC_FLAG_BUS_CLK;
 }
 
-POWERPC_FAMILY(460EX)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(460EX)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2329,7 +2329,7 @@ static void init_proc_440GP(CPUPPCState *env)
     SET_WDT_PERIOD(20, 24, 28, 32);
 }
 
-POWERPC_FAMILY(440GP)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(440GP)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2399,7 +2399,7 @@ static void init_proc_440x5(CPUPPCState *env)
     SET_WDT_PERIOD(20, 24, 28, 32);
 }
 
-POWERPC_FAMILY(440x5)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(440x5)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2435,7 +2435,7 @@ POWERPC_FAMILY(440x5)(ObjectClass *oc, void *data)
                  POWERPC_FLAG_DE | POWERPC_FLAG_BUS_CLK;
 }
 
-POWERPC_FAMILY(440x5wDFPU)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(440x5wDFPU)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2484,7 +2484,7 @@ static void init_proc_MPC5xx(CPUPPCState *env)
     /* XXX: TODO: allocate internal IRQ controller */
 }
 
-POWERPC_FAMILY(MPC5xx)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(MPC5xx)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2527,7 +2527,7 @@ static void init_proc_MPC8xx(CPUPPCState *env)
     /* XXX: TODO: allocate internal IRQ controller */
 }
 
-POWERPC_FAMILY(MPC8xx)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(MPC8xx)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2578,7 +2578,7 @@ static void init_proc_G2(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(G2)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(G2)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2617,7 +2617,7 @@ POWERPC_FAMILY(G2)(ObjectClass *oc, void *data)
                  POWERPC_FLAG_BE | POWERPC_FLAG_BUS_CLK;
 }
 
-POWERPC_FAMILY(G2LE)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(G2LE)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -2752,7 +2752,7 @@ static void init_proc_e200(CPUPPCState *env)
     /* XXX: TODO: allocate internal IRQ controller */
 }
 
-POWERPC_FAMILY(e200)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(e200)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3045,7 +3045,7 @@ static void init_proc_e500v1(CPUPPCState *env)
     init_proc_e500(env, fsl_e500v1);
 }
 
-POWERPC_FAMILY(e500v1)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(e500v1)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3089,7 +3089,7 @@ static void init_proc_e500v2(CPUPPCState *env)
     init_proc_e500(env, fsl_e500v2);
 }
 
-POWERPC_FAMILY(e500v2)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(e500v2)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3133,7 +3133,7 @@ static void init_proc_e500mc(CPUPPCState *env)
     init_proc_e500(env, fsl_e500mc);
 }
 
-POWERPC_FAMILY(e500mc)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(e500mc)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3180,7 +3180,7 @@ static void init_proc_e5500(CPUPPCState *env)
     init_proc_e500(env, fsl_e5500);
 }
 
-POWERPC_FAMILY(e5500)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(e5500)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3229,7 +3229,7 @@ static void init_proc_e6500(CPUPPCState *env)
     init_proc_e500(env, fsl_e6500);
 }
 
-POWERPC_FAMILY(e6500)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(e6500)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3292,7 +3292,7 @@ static void init_proc_603(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(603)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(603)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3332,7 +3332,7 @@ POWERPC_FAMILY(603)(ObjectClass *oc, void *data)
                  POWERPC_FLAG_BE | POWERPC_FLAG_BUS_CLK;
 }
 
-POWERPC_FAMILY(603E)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(603E)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3378,7 +3378,7 @@ static void init_proc_e300(CPUPPCState *env)
     register_e300_sprs(env);
 }
 
-POWERPC_FAMILY(e300)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(e300)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3434,7 +3434,7 @@ static void init_proc_604(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(604)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(604)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3480,7 +3480,7 @@ static void init_proc_604E(CPUPPCState *env)
     register_604e_sprs(env);
 }
 
-POWERPC_FAMILY(604E)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(604E)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3537,7 +3537,7 @@ static void init_proc_740(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(740)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(740)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3603,7 +3603,7 @@ static void init_proc_750(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(750)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(750)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3750,7 +3750,7 @@ static void init_proc_750cl(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(750cl)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(750cl)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3858,7 +3858,7 @@ static void init_proc_750cx(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(750cx)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(750cx)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -3931,7 +3931,7 @@ static void init_proc_750fx(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(750fx)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(750fx)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4004,7 +4004,7 @@ static void init_proc_750gx(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(750gx)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(750gx)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4064,7 +4064,7 @@ static void init_proc_745(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(745)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(745)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4110,7 +4110,7 @@ static void init_proc_755(CPUPPCState *env)
     register_755_sprs(env);
 }
 
-POWERPC_FAMILY(755)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(755)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4177,7 +4177,7 @@ static void init_proc_7400(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(7400)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(7400)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4257,7 +4257,7 @@ static void init_proc_7410(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(7410)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(7410)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4358,7 +4358,7 @@ static void init_proc_7440(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(7440)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(7440)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4481,7 +4481,7 @@ static void init_proc_7450(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(7450)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(7450)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4611,7 +4611,7 @@ static void init_proc_7445(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(7445)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(7445)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4743,7 +4743,7 @@ static void init_proc_7455(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(7455)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(7455)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -4895,7 +4895,7 @@ static void init_proc_7457(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(7457)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(7457)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -5030,7 +5030,7 @@ static void init_proc_e600(CPUPPCState *env)
     ppc6xx_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(e600)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(e600)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -5995,7 +5995,7 @@ static void init_proc_970(CPUPPCState *env)
     ppc970_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(970)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(970)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -6070,7 +6070,7 @@ static void init_proc_power5plus(CPUPPCState *env)
     ppc970_irq_init(env_archcpu(env));
 }
 
-POWERPC_FAMILY(POWER5P)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(POWER5P)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -6176,7 +6176,7 @@ static bool ppc_pvr_match_power7(PowerPCCPUClass *pcc, uint32_t pvr, bool best)
     return true;
 }
 
-POWERPC_FAMILY(POWER7)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(POWER7)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -6340,7 +6340,7 @@ static bool ppc_pvr_match_power8(PowerPCCPUClass *pcc, uint32_t pvr, bool best)
     return true;
 }
 
-POWERPC_FAMILY(POWER8)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(POWER8)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -6549,7 +6549,7 @@ static bool ppc_pvr_match_power9(PowerPCCPUClass *pcc, uint32_t pvr, bool best)
     return false;
 }
 
-POWERPC_FAMILY(POWER9)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(POWER9)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -6647,7 +6647,7 @@ static bool ppc_pvr_match_power10(PowerPCCPUClass *pcc, uint32_t pvr, bool best)
     return false;
 }
 
-POWERPC_FAMILY(POWER10)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(POWER10)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -6707,7 +6707,7 @@ static bool ppc_pvr_match_power11(PowerPCCPUClass *pcc, uint32_t pvr, bool best)
     return false;
 }
 
-POWERPC_FAMILY(POWER11)(ObjectClass *oc, void *data)
+POWERPC_FAMILY(POWER11)(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
@@ -7082,7 +7082,7 @@ ObjectClass *ppc_cpu_class_by_name(const char *name)
     if (strcmp(name, "max") == 0) {
         MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
         if (mc) {
-            return object_class_by_name(mc->default_cpu_type);
+            return object_class_by_name(machine_class_default_cpu_type(mc));
         }
     }
 #endif
@@ -7177,7 +7177,7 @@ static void ppc_cpu_list_entry(gpointer data, gpointer user_data)
     g_free(name);
 }
 
-void ppc_cpu_list(void)
+static void ppc_cpu_list(void)
 {
     GSList *list;
 
@@ -7504,7 +7504,7 @@ static const TCGCPUOps ppc_tcg_ops = {
 };
 #endif /* CONFIG_TCG */
 
-static void ppc_cpu_class_init(ObjectClass *oc, void *data)
+static void ppc_cpu_class_init(ObjectClass *oc, const void *data)
 {
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
@@ -7521,6 +7521,7 @@ static void ppc_cpu_class_init(ObjectClass *oc, void *data)
                                        &pcc->parent_phases);
 
     cc->class_by_name = ppc_cpu_class_by_name;
+    cc->list_cpus = ppc_cpu_list;
     cc->dump_state = ppc_cpu_dump_state;
     cc->set_pc = ppc_cpu_set_pc;
     cc->get_pc = ppc_cpu_get_pc;
@@ -7569,7 +7570,7 @@ static const TypeInfo ppc_cpu_type_info = {
     .class_size = sizeof(PowerPCCPUClass),
     .class_init = ppc_cpu_class_init,
 #ifndef CONFIG_USER_ONLY
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
           { TYPE_INTERRUPT_STATS_PROVIDER },
           { }
     },
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 3fe54798c6..8a957c3c7d 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2383,7 +2383,7 @@ static bool kvmppc_cpu_realize(CPUState *cs, Error **errp)
     return true;
 }
 
-static void kvmppc_host_cpu_class_init(ObjectClass *oc, void *data)
+static void kvmppc_host_cpu_class_init(ObjectClass *oc, const void *data)
 {
     PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
     uint32_t dcache_size = kvmppc_read_int_cpu_dt("d-cache-size");
@@ -3004,7 +3004,7 @@ void kvm_arch_accel_class_init(ObjectClass *oc)
 {
 }
 
-static void kvm_cpu_accel_class_init(ObjectClass *oc, void *data)
+static void kvm_cpu_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
 
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 2b830b3317..e0604f4c78 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -3028,7 +3028,7 @@ static const struct SysemuCPUOps riscv_sysemu_ops = {
 };
 #endif
 
-static void riscv_cpu_common_class_init(ObjectClass *c, void *data)
+static void riscv_cpu_common_class_init(ObjectClass *c, const void *data)
 {
     RISCVCPUClass *mcc = RISCV_CPU_CLASS(c);
     CPUClass *cc = CPU_CLASS(c);
@@ -3061,7 +3061,7 @@ static void riscv_cpu_common_class_init(ObjectClass *c, void *data)
     device_class_set_props(dc, riscv_cpu_properties);
 }
 
-static void riscv_cpu_class_init(ObjectClass *c, void *data)
+static void riscv_cpu_class_init(ObjectClass *c, const void *data)
 {
     RISCVCPUClass *mcc = RISCV_CPU_CLASS(c);
 
diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index 5315134e08..75724b6af4 100644
--- a/target/riscv/kvm/kvm-cpu.c
+++ b/target/riscv/kvm/kvm-cpu.c
@@ -1976,7 +1976,7 @@ void riscv_kvm_cpu_finalize_features(RISCVCPU *cpu, Error **errp)
     kvm_riscv_destroy_scratch_vcpu(&kvmcpu);
 }
 
-static void kvm_cpu_accel_class_init(ObjectClass *oc, void *data)
+static void kvm_cpu_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
 
@@ -1997,7 +1997,7 @@ static void kvm_cpu_accel_register_types(void)
 }
 type_init(kvm_cpu_accel_register_types);
 
-static void riscv_host_cpu_class_init(ObjectClass *c, void *data)
+static void riscv_host_cpu_class_init(ObjectClass *c, const void *data)
 {
     RISCVCPUClass *mcc = RISCV_CPU_CLASS(c);
 
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index 426145c3b9..54ac54f2e1 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -1528,7 +1528,7 @@ static void riscv_tcg_cpu_instance_init(CPUState *cs)
     }
 }
 
-static void riscv_tcg_cpu_accel_class_init(ObjectClass *oc, void *data)
+static void riscv_tcg_cpu_accel_class_init(ObjectClass *oc, const void *data)
 {
     AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
 
diff --git a/target/rx/cpu.c b/target/rx/cpu.c
index 0a7a2b55b5..a51b543028 100644
--- a/target/rx/cpu.c
+++ b/target/rx/cpu.c
@@ -220,7 +220,7 @@ static const TCGCPUOps rx_tcg_ops = {
     .do_interrupt = rx_cpu_do_interrupt,
 };
 
-static void rx_cpu_class_init(ObjectClass *klass, void *data)
+static void rx_cpu_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     CPUClass *cc = CPU_CLASS(klass);
diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
index 41cccc1e69..3d644f5e23 100644
--- a/target/s390x/cpu.c
+++ b/target/s390x/cpu.c
@@ -371,7 +371,7 @@ static const TCGCPUOps s390_tcg_ops = {
 };
 #endif /* CONFIG_TCG */
 
-static void s390_cpu_class_init(ObjectClass *oc, void *data)
+static void s390_cpu_class_init(ObjectClass *oc, const void *data)
 {
     S390CPUClass *scc = S390_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(scc);
@@ -386,6 +386,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
                                        &scc->parent_phases);
 
     cc->class_by_name = s390_cpu_class_by_name;
+    cc->list_cpus = s390_cpu_list;
     cc->dump_state = s390_cpu_dump_state;
     cc->query_cpu_fast = s390_query_cpu_fast;
     cc->set_pc = s390_cpu_set_pc;
diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
index 90f64ee20c..d9ca2506e2 100644
--- a/target/s390x/cpu.h
+++ b/target/s390x/cpu.h
@@ -900,13 +900,6 @@ static inline uint8_t s390_cpu_get_state(S390CPU *cpu)
 }
 
 
-/* cpu_models.c */
-void s390_cpu_list(void);
-#define cpu_list s390_cpu_list
-void s390_set_qemu_cpu_model(uint16_t type, uint8_t gen, uint8_t ec_ga,
-                             const S390FeatInit feat_init);
-
-
 /* helper.c */
 #define CPU_RESOLVING_TYPE TYPE_S390_CPU
 
diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
index 8e0b01dc65..8951f1b36f 100644
--- a/target/s390x/cpu_models.c
+++ b/target/s390x/cpu_models.c
@@ -919,7 +919,7 @@ void s390_cpu_model_class_register_props(ObjectClass *oc)
 }
 
 #ifdef CONFIG_KVM
-static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data)
+static void s390_host_cpu_model_class_init(ObjectClass *oc, const void *data)
 {
     S390CPUClass *xcc = S390_CPU_CLASS(oc);
 
@@ -928,7 +928,7 @@ static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data)
 }
 #endif
 
-static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data)
+static void s390_base_cpu_model_class_init(ObjectClass *oc, const void *data)
 {
     S390CPUClass *xcc = S390_CPU_CLASS(oc);
 
@@ -939,7 +939,7 @@ static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data)
     xcc->desc = xcc->cpu_def->desc;
 }
 
-static void s390_cpu_model_class_init(ObjectClass *oc, void *data)
+static void s390_cpu_model_class_init(ObjectClass *oc, const void *data)
 {
     S390CPUClass *xcc = S390_CPU_CLASS(oc);
 
@@ -949,7 +949,7 @@ static void s390_cpu_model_class_init(ObjectClass *oc, void *data)
     xcc->desc = xcc->cpu_def->desc;
 }
 
-static void s390_qemu_cpu_model_class_init(ObjectClass *oc, void *data)
+static void s390_qemu_cpu_model_class_init(ObjectClass *oc, const void *data)
 {
     S390CPUClass *xcc = S390_CPU_CLASS(oc);
 
@@ -958,7 +958,7 @@ static void s390_qemu_cpu_model_class_init(ObjectClass *oc, void *data)
                                 qemu_hw_version());
 }
 
-static void s390_max_cpu_model_class_init(ObjectClass *oc, void *data)
+static void s390_max_cpu_model_class_init(ObjectClass *oc, const void *data)
 {
     S390CPUClass *xcc = S390_CPU_CLASS(oc);
 
@@ -1072,7 +1072,7 @@ static void register_types(void)
             .instance_init = s390_cpu_model_initfn,
             .instance_finalize = s390_cpu_model_finalize,
             .class_init = s390_base_cpu_model_class_init,
-            .class_data = (void *) &s390_cpu_defs[i],
+            .class_data = &s390_cpu_defs[i],
         };
         char *name = s390_cpu_type_name(s390_cpu_defs[i].name);
         TypeInfo ti = {
@@ -1081,7 +1081,7 @@ static void register_types(void)
             .instance_init = s390_cpu_model_initfn,
             .instance_finalize = s390_cpu_model_finalize,
             .class_init = s390_cpu_model_class_init,
-            .class_data = (void *) &s390_cpu_defs[i],
+            .class_data = &s390_cpu_defs[i],
         };
 
         type_register_static(&ti_base);
diff --git a/target/s390x/cpu_models.h b/target/s390x/cpu_models.h
index 71d4bc2dd4..f701bc0b53 100644
--- a/target/s390x/cpu_models.h
+++ b/target/s390x/cpu_models.h
@@ -113,6 +113,9 @@ static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model)
 }
 S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
                                     S390FeatBitmap features);
+void s390_set_qemu_cpu_model(uint16_t type, uint8_t gen, uint8_t ec_ga,
+                             const S390FeatInit feat_init);
+void s390_cpu_list(void);
 
 bool kvm_s390_cpu_models_supported(void);
 bool kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp);
diff --git a/target/s390x/kvm/pv.c b/target/s390x/kvm/pv.c
index b191a4a68a..fe0a72c416 100644
--- a/target/s390x/kvm/pv.c
+++ b/target/s390x/kvm/pv.c
@@ -367,7 +367,7 @@ OBJECT_DEFINE_TYPE_WITH_INTERFACES(S390PVGuest,
                                    { TYPE_USER_CREATABLE },
                                    { NULL })
 
-static void s390_pv_guest_class_init(ObjectClass *oc, void *data)
+static void s390_pv_guest_class_init(ObjectClass *oc, const void *data)
 {
     ConfidentialGuestSupportClass *klass = CONFIDENTIAL_GUEST_SUPPORT_CLASS(oc);
 
diff --git a/target/sh4/cpu.c b/target/sh4/cpu.c
index 861fdd47f7..57d7b5fbc8 100644
--- a/target/sh4/cpu.c
+++ b/target/sh4/cpu.c
@@ -177,7 +177,7 @@ static void sh7750r_cpu_initfn(Object *obj)
     env->features = SH_FEATURE_BCR3_AND_BCR4;
 }
 
-static void sh7750r_class_init(ObjectClass *oc, void *data)
+static void sh7750r_class_init(ObjectClass *oc, const void *data)
 {
     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 
@@ -194,7 +194,7 @@ static void sh7751r_cpu_initfn(Object *obj)
     env->features = SH_FEATURE_BCR3_AND_BCR4;
 }
 
-static void sh7751r_class_init(ObjectClass *oc, void *data)
+static void sh7751r_class_init(ObjectClass *oc, const void *data)
 {
     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 
@@ -211,7 +211,7 @@ static void sh7785_cpu_initfn(Object *obj)
     env->features = SH_FEATURE_SH4A;
 }
 
-static void sh7785_class_init(ObjectClass *oc, void *data)
+static void sh7785_class_init(ObjectClass *oc, const void *data)
 {
     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 
@@ -282,7 +282,7 @@ static const TCGCPUOps superh_tcg_ops = {
 #endif /* !CONFIG_USER_ONLY */
 };
 
-static void superh_cpu_class_init(ObjectClass *oc, void *data)
+static void superh_cpu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
diff --git a/target/sparc/cpu.c b/target/sparc/cpu.c
index f7d231c6f8..bc753d5f62 100644
--- a/target/sparc/cpu.c
+++ b/target/sparc/cpu.c
@@ -580,7 +580,7 @@ static void print_features(uint32_t features, const char *prefix)
     }
 }
 
-void sparc_cpu_list(void)
+static void sparc_cpu_list(void)
 {
     unsigned int i;
 
@@ -1042,7 +1042,7 @@ static const TCGCPUOps sparc_tcg_ops = {
 };
 #endif /* CONFIG_TCG */
 
-static void sparc_cpu_class_init(ObjectClass *oc, void *data)
+static void sparc_cpu_class_init(ObjectClass *oc, const void *data)
 {
     SPARCCPUClass *scc = SPARC_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
@@ -1057,6 +1057,7 @@ static void sparc_cpu_class_init(ObjectClass *oc, void *data)
                                        &scc->parent_phases);
 
     cc->class_by_name = sparc_cpu_class_by_name;
+    cc->list_cpus = sparc_cpu_list,
     cc->parse_features = sparc_cpu_parse_features;
     cc->dump_state = sparc_cpu_dump_state;
 #if !defined(TARGET_SPARC64) && !defined(CONFIG_USER_ONLY)
@@ -1090,7 +1091,7 @@ static const TypeInfo sparc_cpu_type_info = {
     .class_init = sparc_cpu_class_init,
 };
 
-static void sparc_cpu_cpudef_class_init(ObjectClass *oc, void *data)
+static void sparc_cpu_cpudef_class_init(ObjectClass *oc, const void *data)
 {
     SPARCCPUClass *scc = SPARC_CPU_CLASS(oc);
     scc->cpu_def = data;
@@ -1103,7 +1104,7 @@ static void sparc_register_cpudef_type(const struct sparc_def_t *def)
         .name = typename,
         .parent = TYPE_SPARC_CPU,
         .class_init = sparc_cpu_cpudef_class_init,
-        .class_data = (void *)def,
+        .class_data = def,
     };
 
     type_register_static(&ti);
diff --git a/target/sparc/cpu.h b/target/sparc/cpu.h
index 83ac818933..37fd1e066e 100644
--- a/target/sparc/cpu.h
+++ b/target/sparc/cpu.h
@@ -595,7 +595,6 @@ G_NORETURN void cpu_raise_exception_ra(CPUSPARCState *, int, uintptr_t);
 
 /* cpu_init.c */
 void cpu_sparc_set_id(CPUSPARCState *env, unsigned int cpu);
-void sparc_cpu_list(void);
 /* mmu_helper.c */
 bool sparc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
                         MMUAccessType access_type, int mmu_idx,
@@ -666,8 +665,6 @@ hwaddr cpu_get_phys_page_nofault(CPUSPARCState *env, target_ulong addr,
 
 #define CPU_RESOLVING_TYPE TYPE_SPARC_CPU
 
-#define cpu_list sparc_cpu_list
-
 /* MMU modes definitions */
 #if defined (TARGET_SPARC64)
 #define MMU_USER_IDX   0
diff --git a/target/tricore/cpu.c b/target/tricore/cpu.c
index a4f93e7d91..098cd06c54 100644
--- a/target/tricore/cpu.c
+++ b/target/tricore/cpu.c
@@ -185,7 +185,7 @@ static const TCGCPUOps tricore_tcg_ops = {
     .cpu_exec_halt = tricore_cpu_has_work,
 };
 
-static void tricore_cpu_class_init(ObjectClass *c, void *data)
+static void tricore_cpu_class_init(ObjectClass *c, const void *data)
 {
     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
     CPUClass *cc = CPU_CLASS(c);
diff --git a/target/xtensa/cpu.c b/target/xtensa/cpu.c
index 971e67ad97..27d6e40195 100644
--- a/target/xtensa/cpu.c
+++ b/target/xtensa/cpu.c
@@ -253,7 +253,7 @@ static const TCGCPUOps xtensa_tcg_ops = {
 #endif /* !CONFIG_USER_ONLY */
 };
 
-static void xtensa_cpu_class_init(ObjectClass *oc, void *data)
+static void xtensa_cpu_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
diff --git a/target/xtensa/helper.c b/target/xtensa/helper.c
index d02d16f9ec..2d93b45036 100644
--- a/target/xtensa/helper.c
+++ b/target/xtensa/helper.c
@@ -170,7 +170,7 @@ static void xtensa_finalize_config(XtensaConfig *config)
     }
 }
 
-static void xtensa_core_class_init(ObjectClass *oc, void *data)
+static void xtensa_core_class_init(ObjectClass *oc, const void *data)
 {
     CPUClass *cc = CPU_CLASS(oc);
     XtensaCPUClass *xcc = XTENSA_CPU_CLASS(oc);
@@ -192,7 +192,7 @@ void xtensa_register_core(XtensaConfigList *node)
     TypeInfo type = {
         .parent = TYPE_XTENSA_CPU,
         .class_init = xtensa_core_class_init,
-        .class_data = (void *)node->config,
+        .class_data = node->config,
     };
 
     xtensa_finalize_config(node->config);
diff --git a/target/xtensa/translate.c b/target/xtensa/translate.c
index 5ebd4a512c..2af83c07c2 100644
--- a/target/xtensa/translate.c
+++ b/target/xtensa/translate.c
@@ -1395,11 +1395,11 @@ static void translate_bbi(DisasContext *dc, const OpcodeArg arg[],
                           const uint32_t par[])
 {
     TCGv_i32 tmp = tcg_temp_new_i32();
-#if TARGET_BIG_ENDIAN
-    tcg_gen_andi_i32(tmp, arg[0].in, 0x80000000u >> arg[1].imm);
-#else
-    tcg_gen_andi_i32(tmp, arg[0].in, 0x00000001u << arg[1].imm);
-#endif
+    if (TARGET_BIG_ENDIAN) {
+        tcg_gen_andi_i32(tmp, arg[0].in, 0x80000000u >> arg[1].imm);
+    } else {
+        tcg_gen_andi_i32(tmp, arg[0].in, 0x00000001u << arg[1].imm);
+    }
     gen_brcondi(dc, par[0], tmp, 0, arg[2].imm);
 }
 
diff --git a/tests/tcg/plugins/mem.c b/tests/tcg/plugins/mem.c
index d87d6628e0..ca4e8883dd 100644
--- a/tests/tcg/plugins/mem.c
+++ b/tests/tcg/plugins/mem.c
@@ -67,7 +67,7 @@ static enum qemu_plugin_mem_rw rw = QEMU_PLUGIN_MEM_RW;
 static GMutex lock;
 static GHashTable *regions;
 
-static gint addr_order(gconstpointer a, gconstpointer b)
+static gint addr_order(gconstpointer a, gconstpointer b, gpointer d)
 {
     RegionInfo *na = (RegionInfo *) a;
     RegionInfo *nb = (RegionInfo *) b;
@@ -94,7 +94,7 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
     if (do_region_summary) {
         GList *counts = g_hash_table_get_values(regions);
 
-        counts = g_list_sort(counts, addr_order);
+        counts = g_list_sort_with_data(counts, addr_order, NULL);
 
         g_string_printf(out, "Region Base, Reads, Writes, Seen all\n");
 
diff --git a/tests/tcg/plugins/syscall.c b/tests/tcg/plugins/syscall.c
index 47aad55fc1..42801f5c86 100644
--- a/tests/tcg/plugins/syscall.c
+++ b/tests/tcg/plugins/syscall.c
@@ -180,7 +180,7 @@ static void print_entry(gpointer val, gpointer user_data)
     qemu_plugin_outs(out);
 }
 
-static gint comp_func(gconstpointer ea, gconstpointer eb)
+static gint comp_func(gconstpointer ea, gconstpointer eb, gpointer d)
 {
     SyscallStats *ent_a = (SyscallStats *) ea;
     SyscallStats *ent_b = (SyscallStats *) eb;
@@ -197,7 +197,7 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
 
     g_mutex_lock(&lock);
     GList *entries = g_hash_table_get_values(statistics);
-    entries = g_list_sort(entries, comp_func);
+    entries = g_list_sort_with_data(entries, comp_func, NULL);
     qemu_plugin_outs("syscall no.  calls  errors\n");
 
     g_list_foreach(entries, print_entry, NULL);
diff --git a/tests/unit/check-qom-interface.c b/tests/unit/check-qom-interface.c
index c99be97ed8..86ae5f6c3b 100644
--- a/tests/unit/check-qom-interface.c
+++ b/tests/unit/check-qom-interface.c
@@ -38,7 +38,7 @@ static const TypeInfo test_if_info = {
 
 #define PATTERN 0xFAFBFCFD
 
-static void test_class_init(ObjectClass *oc, void *data)
+static void test_class_init(ObjectClass *oc, const void *data)
 {
     TestIfClass *tc = TEST_IF_CLASS(oc);
 
@@ -52,7 +52,7 @@ static const TypeInfo direct_impl_info = {
     .name = TYPE_DIRECT_IMPL,
     .parent = TYPE_OBJECT,
     .class_init = test_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_TEST_IF },
         { }
     }
diff --git a/tests/unit/check-qom-proplist.c b/tests/unit/check-qom-proplist.c
index 13d632cfed..ee3c6fb32b 100644
--- a/tests/unit/check-qom-proplist.c
+++ b/tests/unit/check-qom-proplist.c
@@ -135,7 +135,7 @@ static void dummy_init(Object *obj)
 }
 
 
-static void dummy_class_init(ObjectClass *cls, void *data)
+static void dummy_class_init(ObjectClass *cls, const void *data)
 {
     object_class_property_add_str(cls, "sv",
                                   dummy_get_sv,
@@ -164,7 +164,7 @@ static const TypeInfo dummy_info = {
     .instance_finalize = dummy_finalize,
     .class_size = sizeof(DummyObjectClass),
     .class_init = dummy_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
@@ -264,7 +264,7 @@ static void dummy_dev_unparent(Object *obj)
     object_unparent(OBJECT(dev->bus));
 }
 
-static void dummy_dev_class_init(ObjectClass *klass, void *opaque)
+static void dummy_dev_class_init(ObjectClass *klass, const void *opaque)
 {
     klass->unparent = dummy_dev_unparent;
 }
@@ -288,7 +288,7 @@ static void dummy_bus_unparent(Object *obj)
     object_unparent(OBJECT(bus->backend));
 }
 
-static void dummy_bus_class_init(ObjectClass *klass, void *opaque)
+static void dummy_bus_class_init(ObjectClass *klass, const void *opaque)
 {
     klass->unparent = dummy_bus_unparent;
 }
diff --git a/tests/unit/test-qdev-global-props.c b/tests/unit/test-qdev-global-props.c
index 6f6a306788..33062762a6 100644
--- a/tests/unit/test-qdev-global-props.c
+++ b/tests/unit/test-qdev-global-props.c
@@ -51,7 +51,7 @@ static const Property static_props[] = {
     DEFINE_PROP_UINT32("prop2", MyType, prop2, PROP_DEFAULT),
 };
 
-static void static_prop_class_init(ObjectClass *oc, void *data)
+static void static_prop_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -177,7 +177,7 @@ static void dynamic_instance_init(Object *obj)
                         NULL, NULL);
 }
 
-static void dynamic_class_init(ObjectClass *oc, void *data)
+static void dynamic_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -193,7 +193,7 @@ static const TypeInfo dynamic_prop_type = {
     .class_init = dynamic_class_init,
 };
 
-static void hotplug_class_init(ObjectClass *oc, void *data)
+static void hotplug_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
@@ -209,7 +209,7 @@ static const TypeInfo hotplug_type = {
     .class_init = hotplug_class_init,
 };
 
-static void nohotplug_class_init(ObjectClass *oc, void *data)
+static void nohotplug_class_init(ObjectClass *oc, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
 
diff --git a/tests/unit/test-smp-parse.c b/tests/unit/test-smp-parse.c
index f9bccb56ab..326045ecbb 100644
--- a/tests/unit/test-smp-parse.c
+++ b/tests/unit/test-smp-parse.c
@@ -924,7 +924,7 @@ static void unsupported_params_init(const MachineClass *mc, SMPTestData *data)
     }
 }
 
-static void machine_base_class_init(ObjectClass *oc, void *data)
+static void machine_base_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -934,7 +934,8 @@ static void machine_base_class_init(ObjectClass *oc, void *data)
     mc->name = g_strdup(SMP_MACHINE_NAME);
 }
 
-static void machine_generic_invalid_class_init(ObjectClass *oc, void *data)
+static void machine_generic_invalid_class_init(ObjectClass *oc,
+                                               const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -943,21 +944,22 @@ static void machine_generic_invalid_class_init(ObjectClass *oc, void *data)
     mc->max_cpus = MAX_CPUS - 1;
 }
 
-static void machine_with_modules_class_init(ObjectClass *oc, void *data)
+static void machine_with_modules_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->smp_props.modules_supported = true;
 }
 
-static void machine_with_dies_class_init(ObjectClass *oc, void *data)
+static void machine_with_dies_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->smp_props.dies_supported = true;
 }
 
-static void machine_with_modules_dies_class_init(ObjectClass *oc, void *data)
+static void machine_with_modules_dies_class_init(ObjectClass *oc,
+                                                 const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -965,28 +967,29 @@ static void machine_with_modules_dies_class_init(ObjectClass *oc, void *data)
     mc->smp_props.dies_supported = true;
 }
 
-static void machine_with_clusters_class_init(ObjectClass *oc, void *data)
+static void machine_with_clusters_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->smp_props.clusters_supported = true;
 }
 
-static void machine_with_books_class_init(ObjectClass *oc, void *data)
+static void machine_with_books_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->smp_props.books_supported = true;
 }
 
-static void machine_with_drawers_class_init(ObjectClass *oc, void *data)
+static void machine_with_drawers_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->smp_props.drawers_supported = true;
 }
 
-static void machine_with_drawers_books_class_init(ObjectClass *oc, void *data)
+static void machine_with_drawers_books_class_init(ObjectClass *oc,
+                                                  const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
@@ -994,7 +997,7 @@ static void machine_with_drawers_books_class_init(ObjectClass *oc, void *data)
     mc->smp_props.books_supported = true;
 }
 
-static void machine_full_topo_class_init(ObjectClass *oc, void *data)
+static void machine_full_topo_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
 
diff --git a/ui/console-vc.c b/ui/console-vc.c
index df1341513d..830842064d 100644
--- a/ui/console-vc.c
+++ b/ui/console-vc.c
@@ -1036,7 +1036,7 @@ qemu_text_console_finalize(Object *obj)
 }
 
 static void
-qemu_text_console_class_init(ObjectClass *oc, void *data)
+qemu_text_console_class_init(ObjectClass *oc, const void *data)
 {
     if (!cursor_timer) {
         cursor_timer = timer_new_ms(QEMU_CLOCK_REALTIME, cursor_timer_cb, NULL);
@@ -1065,7 +1065,7 @@ qemu_fixed_text_console_finalize(Object *obj)
 }
 
 static void
-qemu_fixed_text_console_class_init(ObjectClass *oc, void *data)
+qemu_fixed_text_console_class_init(ObjectClass *oc, const void *data)
 {
 }
 
@@ -1181,7 +1181,7 @@ static void vc_chr_parse(QemuOpts *opts, ChardevBackend *backend, Error **errp)
     }
 }
 
-static void char_vc_class_init(ObjectClass *oc, void *data)
+static void char_vc_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/ui/console.c b/ui/console.c
index 6cd122cf40..2d00828c53 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -401,7 +401,7 @@ qemu_console_finalize(Object *obj)
 }
 
 static void
-qemu_console_class_init(ObjectClass *oc, void *data)
+qemu_console_class_init(ObjectClass *oc, const void *data)
 {
 }
 
@@ -437,7 +437,7 @@ qemu_graphic_console_prop_get_head(Object *obj, Visitor *v, const char *name,
 }
 
 static void
-qemu_graphic_console_class_init(ObjectClass *oc, void *data)
+qemu_graphic_console_class_init(ObjectClass *oc, const void *data)
 {
     object_class_property_add_link(oc, "device", TYPE_DEVICE,
                                    offsetof(QemuGraphicConsole, device),
diff --git a/ui/dbus-chardev.c b/ui/dbus-chardev.c
index bf061cbc93..d05dddaf81 100644
--- a/ui/dbus-chardev.c
+++ b/ui/dbus-chardev.c
@@ -269,7 +269,7 @@ dbus_chr_parse(QemuOpts *opts, ChardevBackend *backend,
 }
 
 static void
-char_dbus_class_init(ObjectClass *oc, void *data)
+char_dbus_class_init(ObjectClass *oc, const void *data)
 {
     DBusChardevClass *klass = DBUS_CHARDEV_CLASS(oc);
     ChardevClass *cc = CHARDEV_CLASS(oc);
diff --git a/ui/dbus.c b/ui/dbus.c
index 2eb03aa247..dd0336702d 100644
--- a/ui/dbus.c
+++ b/ui/dbus.c
@@ -404,7 +404,7 @@ set_gl_mode(Object *o, int val, Error **errp)
 }
 
 static void
-dbus_display_class_init(ObjectClass *oc, void *data)
+dbus_display_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -453,7 +453,7 @@ dbus_vc_parse(QemuOpts *opts, ChardevBackend *backend,
 }
 
 static void
-dbus_vc_class_init(ObjectClass *oc, void *data)
+dbus_vc_class_init(ObjectClass *oc, const void *data)
 {
     DBusVCClass *klass = DBUS_VC_CLASS(oc);
     ChardevClass *cc = CHARDEV_CLASS(oc);
@@ -514,7 +514,7 @@ static const TypeInfo dbus_display_info = {
     .instance_init = dbus_display_init,
     .instance_finalize = dbus_display_finalize,
     .class_init = dbus_display_class_init,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/ui/gtk.c b/ui/gtk.c
index 59bda83da6..982037b2c0 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -1879,7 +1879,7 @@ static void gd_vc_open(Chardev *chr,
     *be_opened = false;
 }
 
-static void char_gd_vc_class_init(ObjectClass *oc, void *data)
+static void char_gd_vc_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/ui/input-barrier.c b/ui/input-barrier.c
index c86e5d67eb..9793258aac 100644
--- a/ui/input-barrier.c
+++ b/ui/input-barrier.c
@@ -696,7 +696,7 @@ static void input_barrier_instance_init(Object *obj)
     ib->height = 1080;
 }
 
-static void input_barrier_class_init(ObjectClass *oc, void *data)
+static void input_barrier_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -732,7 +732,7 @@ static const TypeInfo input_barrier_info = {
     .instance_size = sizeof(InputBarrier),
     .instance_init = input_barrier_instance_init,
     .instance_finalize = input_barrier_instance_finalize,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/ui/input-linux.c b/ui/input-linux.c
index 203e264212..92e1a1aa64 100644
--- a/ui/input-linux.c
+++ b/ui/input-linux.c
@@ -494,7 +494,7 @@ static void input_linux_instance_init(Object *obj)
 {
 }
 
-static void input_linux_class_init(ObjectClass *oc, void *data)
+static void input_linux_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -522,7 +522,7 @@ static const TypeInfo input_linux_info = {
     .instance_size = sizeof(InputLinux),
     .instance_init = input_linux_instance_init,
     .instance_finalize = input_linux_instance_finalize,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }
diff --git a/ui/spice-app.c b/ui/spice-app.c
index 91e258a621..24f78f305c 100644
--- a/ui/spice-app.c
+++ b/ui/spice-app.c
@@ -101,7 +101,7 @@ static void vc_chr_parse(QemuOpts *opts, ChardevBackend *backend, Error **errp)
     /* fqdn is dealt with in vc_chr_open() */
 }
 
-static void char_vc_class_init(ObjectClass *oc, void *data)
+static void char_vc_class_init(ObjectClass *oc, const void *data)
 {
     VCChardevClass *vc = CHARDEV_VC_CLASS(oc);
     ChardevClass *cc = CHARDEV_CLASS(oc);
diff --git a/ui/vdagent.c b/ui/vdagent.c
index 724eff972f..04513ded29 100644
--- a/ui/vdagent.c
+++ b/ui/vdagent.c
@@ -905,7 +905,7 @@ static void vdagent_chr_parse(QemuOpts *opts, ChardevBackend *backend,
 
 /* ------------------------------------------------------------------ */
 
-static void vdagent_chr_class_init(ObjectClass *oc, void *data)
+static void vdagent_chr_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
diff --git a/util/main-loop.c b/util/main-loop.c
index 4683db1888..51aeb2432e 100644
--- a/util/main-loop.c
+++ b/util/main-loop.c
@@ -220,7 +220,7 @@ static bool main_loop_can_be_deleted(EventLoopBase *base)
     return false;
 }
 
-static void main_loop_class_init(ObjectClass *oc, void *class_data)
+static void main_loop_class_init(ObjectClass *oc, const void *class_data)
 {
     EventLoopBaseClass *bc = EVENT_LOOP_BASE_CLASS(oc);
 
diff --git a/util/thread-context.c b/util/thread-context.c
index 2bc7883b9e..0146154fa5 100644
--- a/util/thread-context.c
+++ b/util/thread-context.c
@@ -273,7 +273,7 @@ static void thread_context_instance_complete(UserCreatable *uc, Error **errp)
     }
 }
 
-static void thread_context_class_init(ObjectClass *oc, void *data)
+static void thread_context_class_init(ObjectClass *oc, const void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
@@ -319,7 +319,7 @@ static const TypeInfo thread_context_info = {
     .instance_size = sizeof(ThreadContext),
     .instance_init = thread_context_instance_init,
     .instance_finalize = thread_context_instance_finalize,
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }