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qdev: add qdev_add_vm_change_state_handler()

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Children sometimes depend on their parent's vm change state handler
having completed.  Add a vm change state handler API for devices that
guarantees tree depth ordering.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2019-06-20 18:37:08 +01:00 • committed by Kevin Wolf
parent 60dbc5a1c5
commit e965ffa70a
3 changed files with 67 additions and 0 deletions
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5
include/hw/qdev-core.h
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@ -6,6 +6,7 @@
#include "qom/object.h"
#include "hw/irq.h"
#include "hw/hotplug.h"
#include "sysemu/sysemu.h"
enum {
DEV_NVECTORS_UNSPECIFIED = -1,
@ -450,4 +451,8 @@ static inline bool qbus_is_hotpluggable(BusState *bus)
void device_listener_register(DeviceListener *listener);
void device_listener_unregister(DeviceListener *listener);
VMChangeStateEntry *qdev_add_vm_change_state_handler(DeviceState *dev,
VMChangeStateHandler *cb,
void *opaque);
#endif