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virtio: add ability to delete vq through a pointer

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Devices tend to maintain vq pointers, allow deleting them trough a vq pointer.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2019-12-09 11:46:13 -05:00
parent f0dcfddece
commit 722f8c51d8
2 changed files with 12 additions and 5 deletions
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15
hw/virtio/virtio.c
View File

@ -2330,17 +2330,22 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
return &vdev->vq[i];
}
void virtio_delete_queue(VirtQueue *vq)
{
vq->vring.num = 0;
vq->vring.num_default = 0;
vq->handle_output = NULL;
vq->handle_aio_output = NULL;
g_free(vq->used_elems);
}
void virtio_del_queue(VirtIODevice *vdev, int n)
{
if (n < 0 || n >= VIRTIO_QUEUE_MAX) {
abort();
}
vdev->vq[n].vring.num = 0;
vdev->vq[n].vring.num_default = 0;
vdev->vq[n].handle_output = NULL;
vdev->vq[n].handle_aio_output = NULL;
g_free(vdev->vq[n].used_elems);
virtio_delete_queue(&vdev->vq[n]);
}
static void virtio_set_isr(VirtIODevice *vdev, int value)

2
include/hw/virtio/virtio.h
View File

@ -183,6 +183,8 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
void virtio_del_queue(VirtIODevice *vdev, int n);
void virtio_delete_queue(VirtQueue *vq);
void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
unsigned int len);
void virtqueue_flush(VirtQueue *vq, unsigned int count);