[Qemu-devel] [RFC][PATCH 5/6] qom cpu: add struct CPUNotifier for supporting PLUG and UNPLUG cpu notifier

[Chen Fan]

Move struct HotplugEventType from file piix4.c to file qom/cpu.c,
and add struct CPUNotifier for supporting PLUG and UNPLUG cpu notifier.

Signed-off-by: Chen Fan <chen.fan.f...@cn.fujitsu.com>
---
 hw/acpi/piix4.c   |  8 ++------
 include/qom/cpu.h | 10 ++++++++++
 qom/cpu.c         |  6 +++++-
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 0a58ff7..fa82768 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -669,11 +669,6 @@ static const MemoryRegionOps cpu_hotplug_ops = {
     },
 };
 
-typedef enum {
-    PLUG,
-    UNPLUG,
-} HotplugEventType;
-
 static void piix4_cpu_hotplug_req(PIIX4PMState *s, CPUState *cpu,
                                   HotplugEventType action)
 {
@@ -703,8 +698,9 @@ static void piix4_cpu_hotplug_req(PIIX4PMState *s, CPUState 
*cpu,
 static void piix4_cpu_hotplug(Notifier *n, void *opaque)
 {
     PIIX4PMState *s = container_of(n, PIIX4PMState, cpu_hotplug_notifier);
+    CPUNotifier *notifier = opaque;
 
-    piix4_cpu_hotplug_req(s, CPU(opaque), PLUG);
+    piix4_cpu_hotplug_req(s, CPU(notifier->dev), notifier->type);
 }
 
 static void piix4_init_cpu_status(CPUState *cpu, void *data)
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index fa8ec8a..c6f612d 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -518,6 +518,16 @@ void qemu_init_vcpu(CPUState *cpu);
  */
 void cpu_single_step(CPUState *cpu, int enabled);
 
+typedef enum {
+    PLUG,
+    UNPLUG,
+} HotplugEventType;
+
+typedef struct CPUNotifier {
+    DeviceState *dev;
+    HotplugEventType type;
+} CPUNotifier;
+
 #ifdef CONFIG_SOFTMMU
 extern const struct VMStateDescription vmstate_cpu_common;
 #else
diff --git a/qom/cpu.c b/qom/cpu.c
index e3e75de..3439c5d 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -227,10 +227,14 @@ static ObjectClass *cpu_common_class_by_name(const char 
*cpu_model)
 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cpu = CPU(dev);
+    CPUNotifier notifier;
+
+    notifier.dev = dev;
+    notifier.type = PLUG;
 
     if (dev->hotplugged) {
         cpu_synchronize_post_init(cpu);
-        notifier_list_notify(&cpu_hotplug_notifiers, dev);
+        notifier_list_notify(&cpu_hotplug_notifiers, &notifier);
         cpu_resume(cpu);
     }
 }
-- 
1.8.1.4