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vhost: Expose vhost_svq_add 

This allows external parts of SVQ to forward custom buffers to the
device.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Eugenio Pérez 2022-07-20 08:59:37 +02:00 committed by Jason Wang
parent 432efd144e
commit d0291f3f28
2 changed files with 6 additions and 3 deletions
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6
hw/virtio/vhost-shadow-virtqueue.c
View File

@ -238,9 +238,9 @@ static void vhost_svq_kick(VhostShadowVirtqueue *svq)
* *
* Return -EINVAL if element is invalid, -ENOSPC if dev queue is full * Return -EINVAL if element is invalid, -ENOSPC if dev queue is full
*/ */
static int vhost_svq_add(VhostShadowVirtqueue *svq, const struct iovec *out_sg, int vhost_svq_add(VhostShadowVirtqueue *svq, const struct iovec *out_sg,
size_t out_num, const struct iovec *in_sg, size_t out_num, const struct iovec *in_sg, size_t in_num,
size_t in_num, VirtQueueElement *elem) VirtQueueElement *elem)
{ {
unsigned qemu_head; unsigned qemu_head;
unsigned ndescs = in_num + out_num; unsigned ndescs = in_num + out_num;

3
hw/virtio/vhost-shadow-virtqueue.h
View File

@ -86,6 +86,9 @@ bool vhost_svq_valid_features(uint64_t features, Error **errp);
void vhost_svq_push_elem(VhostShadowVirtqueue *svq, void vhost_svq_push_elem(VhostShadowVirtqueue *svq,
const VirtQueueElement *elem, uint32_t len); const VirtQueueElement *elem, uint32_t len);
int vhost_svq_add(VhostShadowVirtqueue *svq, const struct iovec *out_sg,
size_t out_num, const struct iovec *in_sg, size_t in_num,
VirtQueueElement *elem);
void vhost_svq_set_svq_kick_fd(VhostShadowVirtqueue *svq, int svq_kick_fd); void vhost_svq_set_svq_kick_fd(VhostShadowVirtqueue *svq, int svq_kick_fd);
void vhost_svq_set_svq_call_fd(VhostShadowVirtqueue *svq, int call_fd); void vhost_svq_set_svq_call_fd(VhostShadowVirtqueue *svq, int call_fd);