Commit f23fd811 authored by Jason Wang's avatar Jason Wang Committed by Anthony Liguori
Browse files

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: default avatarAnthony Liguori <aliguori@us.ibm.com>
parent a9f98bb5

hw/virtio.c

+9 −0
Original line number Diff line number Diff line
@@ -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);

hw/virtio.h

+2 −0
Original line number Diff line number Diff line
@@ -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);