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[Qemu-devel] [RESEND PATCH v1 5/5] acpi, piix4: Add unplug cb for piix4.

From: Tang Chen
Subject: [Qemu-devel] [RESEND PATCH v1 5/5] acpi, piix4: Add unplug cb for piix4.
Date: Wed, 7 Jan 2015 14:49:45 +0800

Memory and CPU hot unplug are both asynchronize procedures.
When the unplug operation happens, unplug request cb is called first.
And when ghest OS finished handling unplug, unplug cb will be called
to do the real removal of device.

This patch adds hotunplug cb for piix4, and memory and CPU
hot unplug will base on it.
 hw/acpi/piix4.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 481a16c..4407388 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -370,6 +370,13 @@ static void piix4_device_unplug_request_cb(HotplugHandler 
+static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev,
+                                   DeviceState *dev, Error **errp)
+    error_setg(errp, "acpi: device unplug for not supported device"
+               " type: %s", object_get_typename(OBJECT(dev)));
 static void piix4_update_bus_hotplug(PCIBus *pci_bus, void *opaque)
     PIIX4PMState *s = opaque;
@@ -610,6 +617,7 @@ static void piix4_pm_class_init(ObjectClass *klass, void 
     dc->hotpluggable = false;
     hc->plug = piix4_device_plug_cb;
     hc->unplug_request = piix4_device_unplug_request_cb;
+    hc->unplug = piix4_device_unplug_cb;
     adevc->ospm_status = piix4_ospm_status;

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