So different vhost backends can perform custom actions at queue restart.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 include/hw/virtio/vhost-backend.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h
index 37e05fa1f9..651402af10 100644
--- a/include/hw/virtio/vhost-backend.h
+++ b/include/hw/virtio/vhost-backend.h
@@ -135,6 +135,8 @@ typedef void (*vhost_reset_status_op)(struct vhost_dev *dev);
 
 typedef void (*vhost_reset_queue_op)(struct vhost_dev *dev, int idx);
 
+typedef int (*vhost_restart_queue_op)(struct vhost_dev *dev, int idx);
+
 typedef struct VhostOps {
     VhostBackendType backend_type;
     vhost_backend_init vhost_backend_init;
@@ -184,6 +186,7 @@ typedef struct VhostOps {
     vhost_set_config_call_op vhost_set_config_call;
     vhost_reset_status_op vhost_reset_status;
     vhost_reset_queue_op vhost_reset_queue;
+    vhost_restart_queue_op vhost_restart_queue;
 } VhostOps;
 
 int vhost_backend_update_device_iotlb(struct vhost_dev *dev,
-- 
2.39.3