[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH V3 03/11] hotplug: introduce qdev_unplug_complete()
From: |
Liu Ping Fan |
Subject: |
[Qemu-devel] [PATCH V3 03/11] hotplug: introduce qdev_unplug_complete() to remove device from views |
Date: |
Tue, 11 Sep 2012 15:51:44 +0800 |
From: Liu Ping Fan <address@hidden>
When device unplug has been ack by guest, we first remove it from memory
to prevent incoming access from dispatcher. Then we isolate it from
device composition tree
Signed-off-by: Liu Ping Fan <address@hidden>
---
hw/qdev.c | 26 ++++++++++++++++++++++++++
hw/qdev.h | 3 ++-
2 files changed, 28 insertions(+), 1 deletions(-)
diff --git a/hw/qdev.c b/hw/qdev.c
index b5a52ac..73df046 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -104,6 +104,14 @@ void qdev_set_parent_bus(DeviceState *dev, BusState *bus)
bus_add_child(bus, dev);
}
+static void qdev_unset_parent(DeviceState *dev)
+{
+ BusState *b = dev->parent_bus;
+
+ object_unparent(OBJECT(dev));
+ bus_remove_child(b, dev);
+}
+
/* Create a new device. This only initializes the device state structure
and allows properties to be set. qdev_init should be called to
initialize the actual device emulation. */
@@ -193,6 +201,24 @@ void qdev_set_legacy_instance_id(DeviceState *dev, int
alias_id,
dev->alias_required_for_version = required_for_version;
}
+static int qdev_unmap(DeviceState *dev)
+{
+ DeviceClass *dc = DEVICE_GET_CLASS(dev);
+ if (dc->unmap) {
+ dc->unmap(dev);
+ }
+ return 0;
+}
+
+void qdev_unplug_complete(DeviceState *dev, Error **errp)
+{
+ /* isolate from mem view */
+ qdev_unmap(dev);
+ /* isolate from device tree */
+ qdev_unset_parent(dev);
+ object_unref(OBJECT(dev));
+}
+
void qdev_unplug(DeviceState *dev, Error **errp)
{
DeviceClass *dc = DEVICE_GET_CLASS(dev);
diff --git a/hw/qdev.h b/hw/qdev.h
index d699194..aeae29e 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -47,7 +47,7 @@ typedef struct DeviceClass {
/* callbacks */
void (*reset)(DeviceState *dev);
-
+ void (*unmap)(DeviceState *dev);
/* device state */
const VMStateDescription *vmsd;
@@ -161,6 +161,7 @@ void qdev_init_nofail(DeviceState *dev);
void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
int required_for_version);
void qdev_unplug(DeviceState *dev, Error **errp);
+void qdev_unplug_complete(DeviceState *dev, Error **errp);
void qdev_free(DeviceState *dev);
int qdev_simple_unplug_cb(DeviceState *dev);
void qdev_machine_creation_done(void);
--
1.7.4.4
- [Qemu-devel] [PATCH V3 0/10] prepare unplug out of protection of global lock, Liu Ping Fan, 2012/09/11
- [Qemu-devel] [PATCH V3 01/11] atomic: introduce atomic operations, Liu Ping Fan, 2012/09/11
- [Qemu-devel] [PATCH V3 02/11] qom: apply atomic on object's refcount, Liu Ping Fan, 2012/09/11
- [Qemu-devel] [PATCH V3 03/11] hotplug: introduce qdev_unplug_complete() to remove device from views,
Liu Ping Fan <=
- [Qemu-devel] [PATCH V3 04/11] pci: remove pci device from mem view when unplug, Liu Ping Fan, 2012/09/11
- [Qemu-devel] [PATCH V3 05/11] memory: introduce ref, unref interface for MemoryRegionOps, Liu Ping Fan, 2012/09/11
- [Qemu-devel] [PATCH V3 07/11] memory: implement e1000's MemoryRegionOps ref/unref, Liu Ping Fan, 2012/09/11
- [Qemu-devel] [PATCH V3 10/11] vcpu: introduce lockmap, Liu Ping Fan, 2012/09/11