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hw/loongarch/virt: Implement cpu unplug interface

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Implement cpu unplug interfaces including virt_cpu_unplug_request()
and virt_cpu_unplug().

Co-developed-by: Xianglai Li <lixianglai@loongson.cn>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
This commit is contained in:
Bibo Mao 2024-11-27 09:58:17 +08:00
parent 7bf633c53f
commit 2cd6857f6f
1 changed files with 58 additions and 0 deletions
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58
hw/loongarch/virt.c
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@ -816,6 +816,19 @@ static int virt_get_arch_id_from_topo(MachineState *ms, LoongArchCPUTopo *topo)
return arch_id; return arch_id;
} }
/* Find cpu slot in machine->possible_cpus by arch_id */
static CPUArchId *virt_find_cpu_slot(MachineState *ms, int arch_id)
{
int n;
for (n = 0; n < ms->possible_cpus->len; n++) {
if (ms->possible_cpus->cpus[n].arch_id == arch_id) {
return &ms->possible_cpus->cpus[n];
}
}
return NULL;
}
static void virt_cpu_pre_plug(HotplugHandler *hotplug_dev, static void virt_cpu_pre_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp) DeviceState *dev, Error **errp)
{ {
@ -824,11 +837,56 @@ static void virt_cpu_pre_plug(HotplugHandler *hotplug_dev,
static void virt_cpu_unplug_request(HotplugHandler *hotplug_dev, static void virt_cpu_unplug_request(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp) DeviceState *dev, Error **errp)
{ {
LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(hotplug_dev);
Error *err = NULL;
LoongArchCPU *cpu = LOONGARCH_CPU(dev);
CPUState *cs = CPU(dev);
if (cs->cpu_index == 0) {
error_setg(&err, "hot-unplug of boot cpu(id%d=%d:%d:%d) not supported",
cs->cpu_index, cpu->socket_id,
cpu->core_id, cpu->thread_id);
error_propagate(errp, err);
return;
}
hotplug_handler_unplug_request(HOTPLUG_HANDLER(lvms->acpi_ged), dev, &err);
if (err) {
error_propagate(errp, err);
}
} }
static void virt_cpu_unplug(HotplugHandler *hotplug_dev, static void virt_cpu_unplug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp) DeviceState *dev, Error **errp)
{ {
CPUArchId *cpu_slot;
Error *err = NULL;
LoongArchCPU *cpu = LOONGARCH_CPU(dev);
LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(hotplug_dev);
/* Notify ipi and extioi irqchip to remove interrupt routing to CPU */
hotplug_handler_unplug(HOTPLUG_HANDLER(lvms->ipi), dev, &err);
if (err) {
error_propagate(errp, err);
return;
}
hotplug_handler_unplug(HOTPLUG_HANDLER(lvms->extioi), dev, &err);
if (err) {
error_propagate(errp, err);
return;
}
/* Notify acpi ged CPU removed */
hotplug_handler_unplug(HOTPLUG_HANDLER(lvms->acpi_ged), dev, &err);
if (err) {
error_propagate(errp, err);
return;
}
cpu_slot = virt_find_cpu_slot(MACHINE(lvms), cpu->phy_id);
cpu_slot->cpu = NULL;
return;
} }
static void virt_cpu_plug(HotplugHandler *hotplug_dev, static void virt_cpu_plug(HotplugHandler *hotplug_dev,