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vhost, vhost_net: add helper to check if vq has work

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In the next patches each vq might have different workers so one could
have work but others do not. For net, we only want to check specific vqs,
so this adds a helper to check if a vq has work pending and converts
vhost-net to use it.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20230626232307.97930-5-michael.christie@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Mike Christie 2023-06-26 18:22:54 -05:00 committed by Michael S. Tsirkin
parent 737bdb643c
commit 9784df151a
3 changed files with 5 additions and 5 deletions
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2
drivers/vhost/net.c
View File

@ -546,7 +546,7 @@ static void vhost_net_busy_poll(struct vhost_net *net,
endtime = busy_clock() + busyloop_timeout;
while (vhost_can_busy_poll(endtime)) {
if (vhost_has_work(&net->dev)) {
if (vhost_vq_has_work(vq)) {
*busyloop_intr = true;
break;
}

6
drivers/vhost/vhost.c
View File

@ -266,11 +266,11 @@ bool vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work)
EXPORT_SYMBOL_GPL(vhost_work_queue);
/* A lockless hint for busy polling code to exit the loop */
bool vhost_has_work(struct vhost_dev *dev)
bool vhost_vq_has_work(struct vhost_virtqueue *vq)
{
return !llist_empty(&dev->worker->work_list);
return !llist_empty(&vq->worker->work_list);
}
EXPORT_SYMBOL_GPL(vhost_has_work);
EXPORT_SYMBOL_GPL(vhost_vq_has_work);
void vhost_poll_queue(struct vhost_poll *poll)
{

2
drivers/vhost/vhost.h
View File

@ -45,7 +45,6 @@ struct vhost_poll {
void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn);
bool vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work);
bool vhost_has_work(struct vhost_dev *dev);
void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
__poll_t mask, struct vhost_dev *dev);
@ -199,6 +198,7 @@ int vhost_get_vq_desc(struct vhost_virtqueue *,
struct vhost_log *log, unsigned int *log_num);
void vhost_discard_vq_desc(struct vhost_virtqueue *, int n);
bool vhost_vq_has_work(struct vhost_virtqueue *vq);
bool vhost_vq_is_setup(struct vhost_virtqueue *vq);
int vhost_vq_init_access(struct vhost_virtqueue *);
int vhost_add_used(struct vhost_virtqueue *, unsigned int head, int len);