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| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2015-06-04 12:34:12 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2015-06-10 18:15:04 +0200 |
| commit | ab223c9518e8c7eb542ef3133de1a34475b69790 (patch) | |
| tree | e62ffe27d7702e98da126d6808aca3f3d7b1f12a /hw/virtio/virtio-mmio.c | |
| parent | 3c185597c86b8cd0a07c46e7a5bd5aac28bb7200 (diff) | |
| download | focaccia-qemu-ab223c9518e8c7eb542ef3133de1a34475b69790.tar.gz focaccia-qemu-ab223c9518e8c7eb542ef3133de1a34475b69790.zip | |
virtio: allow virtio-1 queue layout
For virtio-1 devices, we allow a more complex queue layout that doesn't require descriptor table and rings on a physically-contigous memory area: add virtio_queue_set_rings() to allow transports to set this up. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio/virtio-mmio.c')
| -rw-r--r-- | hw/virtio/virtio-mmio.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c index c8f72947d4..18660b07b1 100644 --- a/hw/virtio/virtio-mmio.c +++ b/hw/virtio/virtio-mmio.c @@ -333,8 +333,11 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value, case VIRTIO_MMIO_QUEUENUM: DPRINTF("mmio_queue write %d max %d\n", (int)value, VIRTQUEUE_MAX_SIZE); virtio_queue_set_num(vdev, vdev->queue_sel, value); + /* Note: only call this function for legacy devices */ + virtio_queue_update_rings(vdev, vdev->queue_sel); break; case VIRTIO_MMIO_QUEUEALIGN: + /* Note: this is only valid for legacy devices */ virtio_queue_set_align(vdev, vdev->queue_sel, value); break; case VIRTIO_MMIO_QUEUEPFN: |