diff options
| author | Jason Wang <jasowang@redhat.com> | 2013-01-30 19:12:36 +0800 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2013-02-01 11:03:02 -0600 |
| commit | f23fd811ac4f49f482058cad3b465dc5dc0edc11 (patch) | |
| tree | 403969fc76e3749d9d0f9832d243daf60f22e3de | |
| parent | a9f98bb5ebe6fb1869321dcc58e72041ae626ad8 (diff) | |
virtio: introduce virtio_del_queue()
Some device (such as virtio-net) needs the ability to destroy or re-order the
virtqueues, this patch adds a helper to do this.
Signed-off-by: Jason Wang <jasowang>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
| -rw-r--r-- | hw/virtio.c | 9 | ||||
| -rw-r--r-- | hw/virtio.h | 2 |
2 files changed, 11 insertions, 0 deletions
diff --git a/hw/virtio.c b/hw/virtio.c index ca170c319e..d8c77b054d 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -701,6 +701,15 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size, return &vdev->vq[i]; } +void virtio_del_queue(VirtIODevice *vdev, int n) +{ + if (n < 0 || n >= VIRTIO_PCI_QUEUE_MAX) { + abort(); + } + + vdev->vq[n].vring.num = 0; +} + void virtio_irq(VirtQueue *vq) { trace_virtio_irq(vq); diff --git a/hw/virtio.h b/hw/virtio.h index 9cc7b85671..d3da1d25df 100644 --- a/hw/virtio.h +++ b/hw/virtio.h @@ -181,6 +181,8 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size, void (*handle_output)(VirtIODevice *, VirtQueue *)); +void virtio_del_queue(VirtIODevice *vdev, int n); + void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem, unsigned int len); void virtqueue_flush(VirtQueue *vq, unsigned int count); |