diff options
| -rw-r--r-- | hw/virtio/vhost-vdpa.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index ec38189..93dbe10 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -1141,8 +1141,25 @@ static int vhost_vdpa_set_vring_base(struct vhost_dev *dev, static int vhost_vdpa_get_vring_base(struct vhost_dev *dev, struct vhost_vring_state *ring) { + struct vhost_vdpa *v = dev->opaque; int ret; + if (v->shadow_vqs_enabled) { + VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, + ring->index); + + /* + * Setting base as last used idx, so destination will see as available + * all the entries that the device did not use, including the in-flight + * processing ones. + * + * TODO: This is ok for networking, but other kinds of devices might + * have problems with these retransmissions. + */ + ring->num = svq->last_used_idx; + return 0; + } + ret = vhost_vdpa_call(dev, VHOST_GET_VRING_BASE, ring); trace_vhost_vdpa_get_vring_base(dev, ring->index, ring->num); return ret; |