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[Qemu-devel] [PULL 21/96] acpi, piix4: Add unplug cb for piix4.

From: Michael S. Tsirkin
Subject: [Qemu-devel] [PULL 21/96] acpi, piix4: Add unplug cb for piix4.
Date: Wed, 18 Feb 2015 22:46:09 +0100

From: Tang Chen <address@hidden>

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

This patch adds hotunplug cb to piix4, which memory and CPU
hot unplug will use it.

Reviewed-by: Igor Mammedov <address@hidden>
Signed-off-by: Tang Chen <address@hidden>
Signed-off-by: Zhu Guihua <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
 hw/acpi/piix4.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 017510b..766f1b8 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;
@@ -609,6 +616,7 @@ 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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