From 312d3b35349a153e5a069e53170fd929e6b73a2b Mon Sep 17 00:00:00 2001 From: Yuri Benditovich Date: Tue, 13 Dec 2016 10:12:05 +0200 Subject: [PATCH] net: Add virtio queue interface to update used index from vring state Bring virtio queue to correct internal state for host-to-guest operations when vhost is temporary stopped. Signed-off-by: Yuri Benditovich Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/virtio.c | 5 +++++ include/hw/virtio/virtio.h | 1 + 2 files changed, 6 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 8357218ae6..baffff703f 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -2020,6 +2020,11 @@ void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx) vdev->vq[n].shadow_avail_idx = idx; } +void virtio_queue_update_used_idx(VirtIODevice *vdev, int n) +{ + vdev->vq[n].used_idx = vring_used_idx(&vdev->vq[n]); +} + void virtio_queue_invalidate_signalled_used(VirtIODevice *vdev, int n) { vdev->vq[n].signalled_used_valid = false; diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index 5e4176f94c..e15c06489b 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -269,6 +269,7 @@ hwaddr virtio_queue_get_used_size(VirtIODevice *vdev, int n); uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n); void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx); void virtio_queue_invalidate_signalled_used(VirtIODevice *vdev, int n); +void virtio_queue_update_used_idx(VirtIODevice *vdev, int n); VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n); uint16_t virtio_get_queue_index(VirtQueue *vq); EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq);