hw/intc/loongson_ipi: Add TYPE_LOONGSON_IPI_COMMON stub

Introduce LOONGSON_IPI_COMMON stubs, QDev parent of LOONGSON_IPI.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
[PMD: Extracted from bigger commit, added commit description]
Co-Developed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Tested-by: Bibo Mao <maobibo@loongson.cn>
Acked-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20240805180622.21001-4-philmd@linaro.org>

MAINTAINERS

@@ -1250,8 +1250,10 @@ F: configs/devices/loongarch64-softmmu/default.mak
 F: hw/loongarch/
 F: include/hw/loongarch/virt.h
 F: include/hw/intc/loongarch_*.h
+F: include/hw/intc/loongson_ipi_common.h
 F: include/hw/intc/loongson_ipi.h
 F: hw/intc/loongarch_*.c
+F: hw/intc/loongson_ipi_common.c
 F: hw/intc/loongson_ipi.c
 F: include/hw/pci-host/ls7a.h
 F: hw/rtc/ls7a_rtc.c
@@ -1386,11 +1388,13 @@ Loongson-3 virtual platforms
 M: Huacai Chen <chenhuacai@kernel.org>
 R: Jiaxun Yang <jiaxun.yang@flygoat.com>
 S: Maintained
+F: hw/intc/loongson_ipi_common.c
 F: hw/intc/loongson_ipi.c
 F: hw/intc/loongson_liointc.c
 F: hw/mips/loongson3_bootp.c
 F: hw/mips/loongson3_bootp.h
 F: hw/mips/loongson3_virt.c
+F: include/hw/intc/loongson_ipi_common.h
 F: include/hw/intc/loongson_ipi.h
 F: include/hw/intc/loongson_liointc.h
 F: tests/avocado/machine_mips_loongson3v.py

hw/intc/Kconfig

@@ -87,8 +87,12 @@ config GOLDFISH_PIC
 config M68K_IRQC
     bool
 
+config LOONGSON_IPI_COMMON
+    bool
+
 config LOONGSON_IPI
     bool
+    select LOONGSON_IPI_COMMON
 
 config LOONGARCH_PCH_PIC
     bool

hw/intc/loongson_ipi.c

@@ -374,9 +374,12 @@ static Property ipi_properties[] = {
 static void loongson_ipi_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    LoongsonIPIClass *lic = LOONGSON_IPI_CLASS(klass);
 
-    dc->realize = loongson_ipi_realize;
+    device_class_set_parent_realize(dc, loongson_ipi_realize,
-    dc->unrealize = loongson_ipi_unrealize;
+                                    &lic->parent_realize);
+    device_class_set_parent_unrealize(dc, loongson_ipi_unrealize,
+                                      &lic->parent_unrealize);
     device_class_set_props(dc, ipi_properties);
     dc->vmsd = &vmstate_loongson_ipi;
 }
@@ -384,8 +387,9 @@ static void loongson_ipi_class_init(ObjectClass *klass, void *data)
 static const TypeInfo loongson_ipi_types[] = {
     {
         .name               = TYPE_LOONGSON_IPI,
-        .parent             = TYPE_SYS_BUS_DEVICE,
+        .parent             = TYPE_LOONGSON_IPI_COMMON,
         .instance_size      = sizeof(LoongsonIPIState),
+        .class_size         = sizeof(LoongsonIPIClass),
         .class_init         = loongson_ipi_class_init,
     }
 };

hw/intc/loongson_ipi_common.c

@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Loongson IPI interrupt common support
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "hw/sysbus.h"
+#include "hw/intc/loongson_ipi_common.h"
+
+static const TypeInfo loongarch_ipi_common_types[] = {
+    {
+        .name               = TYPE_LOONGSON_IPI_COMMON,
+        .parent             = TYPE_SYS_BUS_DEVICE,
+        .instance_size      = sizeof(LoongsonIPICommonState),
+        .class_size         = sizeof(LoongsonIPICommonClass),
+        .abstract           = true,
+    }
+};
+
+DEFINE_TYPES(loongarch_ipi_common_types)

hw/intc/meson.build

@@ -69,6 +69,7 @@ specific_ss.add(when: 'CONFIG_XIVE', if_true: files('xive.c'))
 specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_XIVE'],
 		if_true: files('spapr_xive_kvm.c'))
 specific_ss.add(when: 'CONFIG_M68K_IRQC', if_true: files('m68k_irqc.c'))
+specific_ss.add(when: 'CONFIG_LOONGSON_IPI_COMMON', if_true: files('loongson_ipi_common.c'))
 specific_ss.add(when: 'CONFIG_LOONGSON_IPI', if_true: files('loongson_ipi.c'))
 specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_PIC', if_true: files('loongarch_pch_pic.c'))
 specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_MSI', if_true: files('loongarch_pch_msi.c'))

include/hw/intc/loongson_ipi.h

@@ -8,6 +8,8 @@
 #ifndef HW_LOONGSON_IPI_H
 #define HW_LOONGSON_IPI_H
 
+#include "qom/object.h"
+#include "hw/intc/loongson_ipi_common.h"
 #include "hw/sysbus.h"
 
 /* Mainy used by iocsr read and write */
@@ -31,7 +33,7 @@
 #define IPI_MBX_NUM           4
 
 #define TYPE_LOONGSON_IPI "loongson_ipi"
-OBJECT_DECLARE_SIMPLE_TYPE(LoongsonIPIState, LOONGSON_IPI)
+OBJECT_DECLARE_TYPE(LoongsonIPIState, LoongsonIPIClass, LOONGSON_IPI)
 
 typedef struct IPICore {
     LoongsonIPIState *ipi;
@@ -45,8 +47,16 @@ typedef struct IPICore {
     qemu_irq irq;
 } IPICore;
 
+struct LoongsonIPIClass {
+    LoongsonIPICommonClass parent_class;
+
+    DeviceRealize parent_realize;
+    DeviceUnrealize parent_unrealize;
+};
+
 struct LoongsonIPIState {
-    SysBusDevice parent_obj;
+    LoongsonIPICommonState parent_obj;
+
     MemoryRegion ipi_iocsr_mem;
     MemoryRegion ipi64_iocsr_mem;
     uint32_t num_cpu;

include/hw/intc/loongson_ipi_common.h

@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Loongson ipi interrupt header files
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef HW_LOONGSON_IPI_COMMON_H
+#define HW_LOONGSON_IPI_COMMON_H
+
+#include "qom/object.h"
+#include "hw/sysbus.h"
+
+#define TYPE_LOONGSON_IPI_COMMON "loongson_ipi_common"
+OBJECT_DECLARE_TYPE(LoongsonIPICommonState,
+                    LoongsonIPICommonClass, LOONGSON_IPI_COMMON)
+
+struct LoongsonIPICommonState {
+    SysBusDevice parent_obj;
+};
+
+struct LoongsonIPICommonClass {
+    SysBusDeviceClass parent_class;
+};
+
+#endif