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>
---
 hw/intc/loongarch_ipi.c         | 29 +++++++++++++++++++++++++++++
 include/hw/intc/loongarch_ipi.h |  1 +
 2 files changed, 30 insertions(+)

diff --git a/hw/intc/loongarch_ipi.c b/hw/intc/loongarch_ipi.c
index b10641dd03..f12c0549f3 100644
--- a/hw/intc/loongarch_ipi.c
+++ b/hw/intc/loongarch_ipi.c
@@ -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, 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;
diff --git a/include/hw/intc/loongarch_ipi.h b/include/hw/intc/loongarch_ipi.h
index 923bf21ecb..a7c6bf85d3 100644
--- a/include/hw/intc/loongarch_ipi.h
+++ b/include/hw/intc/loongarch_ipi.h
@@ -21,6 +21,7 @@ struct LoongarchIPIState {
 struct LoongarchIPIClass {
     LoongsonIPICommonClass parent_class;
     DeviceRealize parent_realize;
+    ResettablePhases parent_phases;
 };
 
 #endif
-- 
2.39.3

在 2025/3/7 下午3:13, Bibo Mao 写道:
> 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>
> ---
>   hw/intc/loongarch_ipi.c         | 29 +++++++++++++++++++++++++++++
>   include/hw/intc/loongarch_ipi.h |  1 +
>   2 files changed, 30 insertions(+)
Reviewed-by: Song Gao <gaosong@loongson.cn>

Thanks.
Song Gao
> diff --git a/hw/intc/loongarch_ipi.c b/hw/intc/loongarch_ipi.c
> index b10641dd03..f12c0549f3 100644
> --- a/hw/intc/loongarch_ipi.c
> +++ b/hw/intc/loongarch_ipi.c
> @@ -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, 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;
> diff --git a/include/hw/intc/loongarch_ipi.h b/include/hw/intc/loongarch_ipi.h
> index 923bf21ecb..a7c6bf85d3 100644
> --- a/include/hw/intc/loongarch_ipi.h
> +++ b/include/hw/intc/loongarch_ipi.h
> @@ -21,6 +21,7 @@ struct LoongarchIPIState {
>   struct LoongarchIPIClass {
>       LoongsonIPICommonClass parent_class;
>       DeviceRealize parent_realize;
> +    ResettablePhases parent_phases;
>   };
>   
>   #endif