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| author | Michael S. Tsirkin <mst@redhat.com> | 2019-12-13 09:22:48 -0500 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-01-05 07:03:03 -0500 |
| commit | d0c5f643383b9e84316f148affff368ac33d75b9 (patch) | |
| tree | b6141c3ecf9268ed7903212705d32f2821b1c762 /hw/virtio | |
| parent | 8fdee7118defeb34441d860047e3e0cfd9da9c26 (diff) | |
| download | qemu-d0c5f643383b9e84316f148affff368ac33d75b9.zip qemu-d0c5f643383b9e84316f148affff368ac33d75b9.tar.gz qemu-d0c5f643383b9e84316f148affff368ac33d75b9.tar.bz2 | |
virtio: update queue size on guest write
Some guests read back queue size after writing it.
Update the size immediatly upon write otherwise
they get confused.
In particular this is the case for seabios.
Reported-by: Roman Kagan <rkagan@virtuozzo.com>
Suggested-by: Denis Plotnikov <dplotnikov@virtuozzo.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/virtio-pci.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index c6b47a9..e5c759e 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1256,6 +1256,8 @@ static void virtio_pci_common_write(void *opaque, hwaddr addr, break; case VIRTIO_PCI_COMMON_Q_SIZE: proxy->vqs[vdev->queue_sel].num = val; + virtio_queue_set_num(vdev, vdev->queue_sel, + proxy->vqs[vdev->queue_sel].num); break; case VIRTIO_PCI_COMMON_Q_MSIX: msix_vector_unuse(&proxy->pci_dev, |