From: Denis Plotnikov Date: Tue, 24 Dec 2019 11:14:46 +0300 Subject: virtio-mmio: update queue size on guest write Git-commit: 1049f4c62c4070618cc5defc9963c6a17ae7a5ae Some guests read back queue size after writing it. Always update the on size write otherwise they might be confused. Cc: qemu-stable@nongnu.org Signed-off-by: Denis Plotnikov Message-Id: <20191224081446.17003-1-dplotnikov@virtuozzo.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Signed-off-by: Bruce Rogers --- hw/virtio/virtio-mmio.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c index 94d934c44b6ca63a4d5c72258e90..1e40a74869dad64fd172e1279b25 100644 --- a/hw/virtio/virtio-mmio.c +++ b/hw/virtio/virtio-mmio.c @@ -295,8 +295,9 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value, break; case VIRTIO_MMIO_QUEUE_NUM: trace_virtio_mmio_queue_write(value, VIRTQUEUE_MAX_SIZE); + virtio_queue_set_num(vdev, vdev->queue_sel, value); + if (proxy->legacy) { - virtio_queue_set_num(vdev, vdev->queue_sel, value); virtio_queue_update_rings(vdev, vdev->queue_sel); } else { proxy->vqs[vdev->queue_sel].num = value;