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hw/intc/loongarch_ipi: Add reset support

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Add reset support with ipi object, register reset callback and clear
internal registers when virt machine resets.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Song Gao <gaosong@loongson.cn>
This commit is contained in:
Bibo Mao 2025-03-07 09:34:41 +08:00
parent 5134cf9b5d
commit 36ad84ecb2
2 changed files with 30 additions and 0 deletions
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29
hw/intc/loongarch_ipi.c
View file

@ -93,6 +93,32 @@ static void loongarch_ipi_realize(DeviceState *dev, Error **errp)
}
}
static void loongarch_ipi_reset_hold(Object *obj, ResetType type)
{
int i;
LoongarchIPIClass *lic = LOONGARCH_IPI_GET_CLASS(obj);
LoongsonIPICommonState *lics = LOONGSON_IPI_COMMON(obj);
IPICore *core;
if (lic->parent_phases.hold) {
lic->parent_phases.hold(obj, type);
}
for (i = 0; i < lics->num_cpu; i++) {
core = lics->cpu + i;
/* IPI with targeted CPU available however not present */
if (!core->cpu) {
continue;
}
core->status = 0;
core->en = 0;
core->set = 0;
core->clear = 0;
memset(core->buf, 0, sizeof(core->buf));
}
}
static void loongarch_ipi_cpu_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
@ -145,10 +171,13 @@ static void loongarch_ipi_class_init(ObjectClass *klass, const void *data)
LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass);
HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
LoongarchIPIClass *lic = LOONGARCH_IPI_CLASS(klass);
ResettableClass *rc = RESETTABLE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
device_class_set_parent_realize(dc, loongarch_ipi_realize,
&lic->parent_realize);
resettable_class_set_parent_phases(rc, NULL, loongarch_ipi_reset_hold,
NULL, &lic->parent_phases);
licc->get_iocsr_as = get_iocsr_as;
licc->cpu_by_arch_id = loongarch_cpu_by_arch_id;
hc->plug = loongarch_ipi_cpu_plug;