acpi: add acpi=OnOffAuto machine property to x86 and arm virt

Remove the global acpi_enabled bool and replace it with an
acpi OnOffAuto machine property.

qemu throws an error now if you use -no-acpi while the machine
type you are using doesn't support acpi in the first place.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20200320100136.11717-1-kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/arm/virt-acpi-build.c

@@ -910,7 +910,7 @@ void virt_acpi_setup(VirtMachineState *vms)
         return;
     }
 
-    if (!acpi_enabled) {
+    if (!virt_is_acpi_enabled(vms)) {
         trace_virt_acpi_setup();
         return;
     }

hw/arm/virt.c

@@ -67,6 +67,7 @@
 #include "kvm_arm.h"
 #include "hw/firmware/smbios.h"
 #include "qapi/visitor.h"
+#include "qapi/qapi-visit-common.h"
 #include "standard-headers/linux/input.h"
 #include "hw/arm/smmuv3.h"
 #include "hw/acpi/acpi.h"
@@ -1844,7 +1845,7 @@ static void machvirt_init(MachineState *machine)
 
     create_pcie(vms);
 
-    if (has_ged && aarch64 && firmware_loaded && acpi_enabled) {
+    if (has_ged && aarch64 && firmware_loaded && virt_is_acpi_enabled(vms)) {
         vms->acpi_dev = create_acpi_ged(vms);
     } else {
         create_gpio(vms);
@@ -1934,6 +1935,31 @@ static void virt_set_its(Object *obj, bool value, Error **errp)
     vms->its = value;
 }
 
+bool virt_is_acpi_enabled(VirtMachineState *vms)
+{
+    if (vms->acpi == ON_OFF_AUTO_OFF) {
+        return false;
+    }
+    return true;
+}
+
+static void virt_get_acpi(Object *obj, Visitor *v, const char *name,
+                          void *opaque, Error **errp)
+{
+    VirtMachineState *vms = VIRT_MACHINE(obj);
+    OnOffAuto acpi = vms->acpi;
+
+    visit_type_OnOffAuto(v, name, &acpi, errp);
+}
+
+static void virt_set_acpi(Object *obj, Visitor *v, const char *name,
+                          void *opaque, Error **errp)
+{
+    VirtMachineState *vms = VIRT_MACHINE(obj);
+
+    visit_type_OnOffAuto(v, name, &vms->acpi, errp);
+}
+
 static char *virt_get_gic_version(Object *obj, Error **errp)
 {
     VirtMachineState *vms = VIRT_MACHINE(obj);
@@ -2113,7 +2139,7 @@ static HotplugHandler *virt_machine_get_hotplug_handler(MachineState *machine,
     if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI)) {
         VirtMachineState *vms = VIRT_MACHINE(machine);
 
-        if (!vms->bootinfo.firmware_loaded || !acpi_enabled) {
+        if (!vms->bootinfo.firmware_loaded || !virt_is_acpi_enabled(vms)) {
             return HOTPLUG_HANDLER(machine);
         }
     }
@@ -2184,6 +2210,12 @@ static void virt_machine_class_init(ObjectClass *oc, void *data)
     mc->numa_mem_supported = true;
     mc->auto_enable_numa_with_memhp = true;
     mc->default_ram_id = "mach-virt.ram";
+
+    object_class_property_add(oc, "acpi", "OnOffAuto",
+        virt_get_acpi, virt_set_acpi,
+        NULL, NULL, &error_abort);
+    object_class_property_set_description(oc, "acpi",
+        "Enable ACPI", &error_abort);
 }
 
 static void virt_instance_init(Object *obj)

hw/i386/acpi-build.c

@@ -3024,7 +3024,7 @@ void acpi_setup(void)
         return;
     }
 
-    if (!acpi_enabled) {
+    if (!x86_machine_is_acpi_enabled(X86_MACHINE(pcms))) {
         ACPI_BUILD_DPRINTF("ACPI disabled. Bailing out.\n");
         return;
     }

hw/i386/pc.c

@@ -1297,7 +1297,7 @@ static void pc_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
      * but pcms->acpi_dev is still created. Check !acpi_enabled in
      * addition to cover this case.
      */
-    if (!pcms->acpi_dev || !acpi_enabled) {
+    if (!pcms->acpi_dev || !x86_machine_is_acpi_enabled(X86_MACHINE(pcms))) {
         error_setg(errp,
                    "memory hotplug is not enabled: missing acpi device or acpi disabled");
         return;
@@ -1351,7 +1351,7 @@ static void pc_memory_unplug_request(HotplugHandler *hotplug_dev,
      * but pcms->acpi_dev is still created. Check !acpi_enabled in
      * addition to cover this case.
      */
-    if (!pcms->acpi_dev || !acpi_enabled) {
+    if (!pcms->acpi_dev || !x86_machine_is_acpi_enabled(X86_MACHINE(pcms))) {
         error_setg(&local_err,
                    "memory hotplug is not enabled: missing acpi device or acpi disabled");
         goto out;

hw/i386/pc_piix.c

@@ -275,7 +275,7 @@ static void pc_init1(MachineState *machine,
         pci_create_simple(pci_bus, piix3_devfn + 2, "piix3-usb-uhci");
     }
 
-    if (pcmc->pci_enabled && acpi_enabled) {
+    if (pcmc->pci_enabled && x86_machine_is_acpi_enabled(X86_MACHINE(pcms))) {
         DeviceState *piix4_pm;
 
         smi_irq = qemu_allocate_irq(pc_acpi_smi_interrupt, first_cpu, 0);

hw/i386/x86.c

@@ -904,11 +904,37 @@ static void x86_machine_set_smm(Object *obj, Visitor *v, const char *name,
     visit_type_OnOffAuto(v, name, &x86ms->smm, errp);
 }
 
+bool x86_machine_is_acpi_enabled(X86MachineState *x86ms)
+{
+    if (x86ms->acpi == ON_OFF_AUTO_OFF) {
+        return false;
+    }
+    return true;
+}
+
+static void x86_machine_get_acpi(Object *obj, Visitor *v, const char *name,
+                                 void *opaque, Error **errp)
+{
+    X86MachineState *x86ms = X86_MACHINE(obj);
+    OnOffAuto acpi = x86ms->acpi;
+
+    visit_type_OnOffAuto(v, name, &acpi, errp);
+}
+
+static void x86_machine_set_acpi(Object *obj, Visitor *v, const char *name,
+                                 void *opaque, Error **errp)
+{
+    X86MachineState *x86ms = X86_MACHINE(obj);
+
+    visit_type_OnOffAuto(v, name, &x86ms->acpi, errp);
+}
+
 static void x86_machine_initfn(Object *obj)
 {
     X86MachineState *x86ms = X86_MACHINE(obj);
 
     x86ms->smm = ON_OFF_AUTO_AUTO;
+    x86ms->acpi = ON_OFF_AUTO_AUTO;
     x86ms->max_ram_below_4g = 0; /* use default */
     x86ms->smp_dies = 1;
 }
@@ -937,6 +963,12 @@ static void x86_machine_class_init(ObjectClass *oc, void *data)
         NULL, NULL, &error_abort);
     object_class_property_set_description(oc, X86_MACHINE_SMM,
         "Enable SMM", &error_abort);
+
+    object_class_property_add(oc, X86_MACHINE_ACPI, "OnOffAuto",
+        x86_machine_get_acpi, x86_machine_set_acpi,
+        NULL, NULL, &error_abort);
+    object_class_property_set_description(oc, X86_MACHINE_ACPI,
+        "Enable ACPI", &error_abort);
 }
 
 static const TypeInfo x86_machine_info = {

include/hw/acpi/acpi.h

@@ -181,7 +181,6 @@ void acpi_send_gpe_event(ACPIREGS *ar, qemu_irq irq,
 void acpi_update_sci(ACPIREGS *acpi_regs, qemu_irq irq);
 
 /* acpi.c */
-extern int acpi_enabled;
 extern char unsigned *acpi_tables;
 extern size_t acpi_tables_len;
 

include/hw/arm/virt.h

@@ -131,6 +131,7 @@ typedef struct {
     bool highmem_ecam;
     bool its;
     bool virt;
+    OnOffAuto acpi;
     VirtGICType gic_version;
     VirtIOMMUType iommu;
     uint16_t virtio_iommu_bdf;
@@ -163,6 +164,7 @@ typedef struct {
     OBJECT_CLASS_CHECK(VirtMachineClass, klass, TYPE_VIRT_MACHINE)
 
 void virt_acpi_setup(VirtMachineState *vms);
+bool virt_is_acpi_enabled(VirtMachineState *vms);
 
 /* Return the number of used redistributor regions  */
 static inline int virt_gicv3_redist_region_count(VirtMachineState *vms)

include/hw/i386/x86.h

@@ -64,6 +64,7 @@ typedef struct {
     unsigned smp_dies;
 
     OnOffAuto smm;
+    OnOffAuto acpi;
 
     /*
      * Address space used by IOAPIC device. All IOAPIC interrupts
@@ -74,6 +75,7 @@ typedef struct {
 
 #define X86_MACHINE_MAX_RAM_BELOW_4G "max-ram-below-4g"
 #define X86_MACHINE_SMM              "smm"
+#define X86_MACHINE_ACPI             "acpi"
 
 #define TYPE_X86_MACHINE   MACHINE_TYPE_NAME("x86")
 #define X86_MACHINE(obj) \
@@ -104,6 +106,7 @@ void x86_load_linux(X86MachineState *x86ms,
                     bool linuxboot_dma_enabled);
 
 bool x86_machine_is_smm_enabled(X86MachineState *x86ms);
+bool x86_machine_is_acpi_enabled(X86MachineState *x86ms);
 
 /* Global System Interrupts */
 

softmmu/vl.c

@@ -144,7 +144,6 @@ static Chardev **serial_hds;
 Chardev *parallel_hds[MAX_PARALLEL_PORTS];
 int win2k_install_hack = 0;
 int singlestep = 0;
-int acpi_enabled = 1;
 int no_hpet = 0;
 int fd_bootchk = 1;
 static int no_reboot;
@@ -3516,7 +3515,8 @@ void qemu_init(int argc, char **argv, char **envp)
                 vnc_parse(optarg, &error_fatal);
                 break;
             case QEMU_OPTION_no_acpi:
-                acpi_enabled = 0;
+                olist = qemu_find_opts("machine");
+                qemu_opts_parse_noisily(olist, "acpi=off", false);
                 break;
             case QEMU_OPTION_no_hpet:
                 no_hpet = 1;