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virtio/migration: Add VMStateDescription to VirtioDeviceClass 

Provide a vmsd pointer for VirtIO devices to use instead of the
load/save methods.

We'll eventually kill off the load/save methods.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2016-10-27 18:36:36 +01:00 committed by Michael S. Tsirkin
parent 5b2ecabaea
commit ea43e25987
2 changed files with 18 additions and 0 deletions
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14
hw/virtio/virtio.c
View File

@ -1635,6 +1635,10 @@ void virtio_save(VirtIODevice *vdev, QEMUFile *f)
vdc->save(vdev, f);
}
if (vdc->vmsd) {
vmstate_save_state(f, vdc->vmsd, vdev, NULL);
}
/* Subsections */
vmstate_save_state(f, &vmstate_virtio, vdev, NULL);
}
@ -1781,6 +1785,13 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id)
}
}
if (vdc->vmsd) {
ret = vmstate_load_state(f, vdc->vmsd, vdev, version_id);
if (ret) {
return ret;
}
}
/* Subsections */
ret = vmstate_load_state(f, &vmstate_virtio, vdev, 1);
if (ret) {
@ -2118,6 +2129,9 @@ static void virtio_device_realize(DeviceState *dev, Error **errp)
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(dev);
Error *err = NULL;
/* Devices should either use vmsd or the load/save methods */
assert(!vdc->vmsd || !vdc->load);
if (vdc->realize != NULL) {
vdc->realize(dev, &err);
if (err != NULL) {

4
include/hw/virtio/virtio.h
View File

@ -125,8 +125,12 @@ typedef struct VirtioDeviceClass {
* must mask in frontend instead.
*/
void (*guest_notifier_mask)(VirtIODevice *vdev, int n, bool mask);
/* Saving and loading of a device; trying to deprecate save/load
* use vmsd for new devices.
*/
void (*save)(VirtIODevice *vdev, QEMUFile *f);
int (*load)(VirtIODevice *vdev, QEMUFile *f, int version_id);
const VMStateDescription *vmsd;
} VirtioDeviceClass;
void virtio_instance_init_common(Object *proxy_obj, void *data,