virtio-gpu: Use migrate_add_blocker for virgl migration blocking

virgl conditionally registers a vmstate as unmigratable when virgl
is enabled; instead use the migrate_add_blocker mechanism.

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>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 325354f9f3..e4f424ad4a 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -118,6 +118,8 @@ typedef struct VirtIOGPU {
         uint32_t req_3d;
         uint32_t bytes_3d;
     } stats;
+
+    Error *migration_blocker;
 } VirtIOGPU;
 
 extern const GraphicHwOps virtio_gpu_ops;