1 files changed, 10 insertions, 0 deletions
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index b643f42ea4..b922412a15 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -1093,6 +1093,15 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
     };
     struct VirtQueue *vvq = virtio_get_queue(vdev, idx);
 
+    if (vdev->device_mode) {
+        state.num = virtio_queue_get_last_avail_idx(vdev, idx);
+        r = dev->vhost_ops->vhost_set_vring_base(dev, &state);
+        if (r) {
+            VHOST_OPS_DEBUG(r, "vhost_set_vring_base failed");
+            return -errno;
+        }
+    }
+    else {
     a = virtio_queue_get_desc_addr(vdev, idx);
     if (a == 0) {
         /* Queue might not be ready for start */
@@ -1148,6 +1157,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
     if (r < 0) {
         goto fail_alloc;
     }
+    }
 
     file.fd = event_notifier_get_fd(virtio_queue_get_host_notifier(vvq));
     r = dev->vhost_ops->vhost_set_vring_kick(dev, &file);