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hw/loongarch/virt: Add basic cpu plug interface framework

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Add basic cpu hotplug interface framework, cpu hotplug interface is
stub function and only framework is added here.

Co-developed-by: Xianglai Li <lixianglai@loongson.cn>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
This commit is contained in:
Bibo Mao 2025-02-10 14:56:01 +08:00
parent d32fde20bd
commit 7bf633c53f
3 changed files with 43 additions and 0 deletions
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29
hw/loongarch/virt.c
View File

@ -816,6 +816,26 @@ static int virt_get_arch_id_from_topo(MachineState *ms, LoongArchCPUTopo *topo)
return arch_id;
}
static void virt_cpu_pre_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
}
static void virt_cpu_unplug_request(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
}
static void virt_cpu_unplug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
}
static void virt_cpu_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
}
static bool memhp_type_supported(DeviceState *dev)
{
/* we only support pc dimm now */
@ -834,6 +854,8 @@ static void virt_device_pre_plug(HotplugHandler *hotplug_dev,
{
if (memhp_type_supported(dev)) {
virt_mem_pre_plug(hotplug_dev, dev, errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_LOONGARCH_CPU)) {
virt_cpu_pre_plug(hotplug_dev, dev, errp);
}
}
@ -852,6 +874,8 @@ static void virt_device_unplug_request(HotplugHandler *hotplug_dev,
{
if (memhp_type_supported(dev)) {
virt_mem_unplug_request(hotplug_dev, dev, errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_LOONGARCH_CPU)) {
virt_cpu_unplug_request(hotplug_dev, dev, errp);
}
}
@ -870,6 +894,8 @@ static void virt_device_unplug(HotplugHandler *hotplug_dev,
{
if (memhp_type_supported(dev)) {
virt_mem_unplug(hotplug_dev, dev, errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_LOONGARCH_CPU)) {
virt_cpu_unplug(hotplug_dev, dev, errp);
}
}
@ -897,6 +923,8 @@ static void virt_device_plug_cb(HotplugHandler *hotplug_dev,
}
} else if (memhp_type_supported(dev)) {
virt_mem_plug(hotplug_dev, dev, errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_LOONGARCH_CPU)) {
virt_cpu_plug(hotplug_dev, dev, errp);
}
}
@ -906,6 +934,7 @@ static HotplugHandler *virt_get_hotplug_handler(MachineState *machine,
MachineClass *mc = MACHINE_GET_CLASS(machine);
if (device_is_dynamic_sysbus(mc, dev) ||
object_dynamic_cast(OBJECT(dev), TYPE_LOONGARCH_CPU) ||
object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI) ||
memhp_type_supported(dev)) {
return HOTPLUG_HANDLER(machine);

13
target/loongarch/cpu.c
View File

@ -647,6 +647,17 @@ static void loongarch_cpu_realizefn(DeviceState *dev, Error **errp)
lacc->parent_realize(dev, errp);
}
static void loongarch_cpu_unrealizefn(DeviceState *dev)
{
LoongArchCPUClass *lacc = LOONGARCH_CPU_GET_CLASS(dev);
#ifndef CONFIG_USER_ONLY
cpu_remove_sync(CPU(dev));
#endif
lacc->parent_unrealize(dev);
}
static bool loongarch_get_lsx(Object *obj, Error **errp)
{
return LOONGARCH_CPU(obj)->lsx != ON_OFF_AUTO_OFF;
@ -897,6 +908,8 @@ static void loongarch_cpu_class_init(ObjectClass *c, void *data)
device_class_set_props(dc, loongarch_cpu_properties);
device_class_set_parent_realize(dc, loongarch_cpu_realizefn,
&lacc->parent_realize);
device_class_set_parent_unrealize(dc, loongarch_cpu_unrealizefn,
&lacc->parent_unrealize);
resettable_class_set_parent_phases(rc, NULL, loongarch_cpu_reset_hold, NULL,
&lacc->parent_phases);

1
target/loongarch/cpu.h
View File

@ -439,6 +439,7 @@ struct LoongArchCPUClass {
CPUClass parent_class;
DeviceRealize parent_realize;
DeviceUnrealize parent_unrealize;
ResettablePhases parent_phases;
};