Signed-off-by: Eugenio Pérez <epere...@redhat.com> --- hw/virtio/vhost-shadow-virtqueue.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c index 68ed0f2740..7df98fc43f 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -145,6 +145,15 @@ static void vhost_shadow_vq_add(VhostShadowVirtqueue *svq, svq->ring_id_maps[qemu_head] = elem; } +static void vhost_shadow_vq_kick(VhostShadowVirtqueue *svq) +{ + /* Make sure we are reading updated device flag */ + smp_rmb(); + if (!(svq->vring.used->flags & VRING_USED_F_NO_NOTIFY)) { + event_notifier_set(&svq->kick_notifier); + } +} + /* Handle guest->device notifications */ static void vhost_handle_guest_kick(EventNotifier *n) { @@ -174,7 +183,7 @@ static void vhost_handle_guest_kick(EventNotifier *n) } vhost_shadow_vq_add(svq, elem); - event_notifier_set(&svq->kick_notifier); + vhost_shadow_vq_kick(svq); } virtio_queue_set_notification(svq->vq, true); -- 2.27.0