This patch has the core work queueing function take a worker for when we
support multiple workers. It also adds a helper that takes a vq during
queueing so modules can control which vq/worker to queue work on.
This temp leaves vhost_work_queue. It will be removed when the drivers
are converted in the next patches.
Signed-off-by: Mike Christie <michael.chris...@oracle.com>
---
drivers/vhost/vhost.c | 44 +++++++++++++++++++++++++++----------------
drivers/vhost/vhost.h | 1 +
2 files changed, 29 insertions(+), 16 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index a832ca692eb1..16630c19bcc2 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -231,21 +231,10 @@ void vhost_poll_stop(struct vhost_poll *poll)
}
EXPORT_SYMBOL_GPL(vhost_poll_stop);
-void vhost_dev_flush(struct vhost_dev *dev)
+static bool vhost_worker_queue(struct vhost_worker *worker,
+ struct vhost_work *work)
{
- struct vhost_flush_struct flush;
-
- init_completion(&flush.wait_event);
- vhost_work_init(&flush.work, vhost_flush_work);
-
- if (vhost_work_queue(dev, &flush.work))
- wait_for_completion(&flush.wait_event);
-}
-EXPORT_SYMBOL_GPL(vhost_dev_flush);
-
-bool vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work)
-{
- if (!dev->worker)
+ if (!worker)
return false;
/*
* vsock can queue while we do a VHOST_SET_OWNER, so we have a smp_wmb
@@ -257,14 +246,37 @@ bool vhost_work_queue(struct vhost_dev *dev, struct
vhost_work *work)
* sure it was not in the list.
* test_and_set_bit() implies a memory barrier.
*/
- llist_add(&work->node, &dev->worker->work_list);
- vhost_task_wake(dev->worker->vtsk);
+ llist_add(&work->node, &worker->work_list);
+ vhost_task_wake(worker->vtsk);
}
return true;
}
+
+bool vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work)
+{
+ return vhost_worker_queue(dev->worker, work);
+}
EXPORT_SYMBOL_GPL(vhost_work_queue);
+bool vhost_vq_work_queue(struct vhost_virtqueue *vq, struct vhost_work *work)
+{
+ return vhost_worker_queue(vq->worker, work);
+}
+EXPORT_SYMBOL_GPL(vhost_vq_work_queue);
+
+void vhost_dev_flush(struct vhost_dev *dev)
+{
+ struct vhost_flush_struct flush;
+
+ init_completion(&flush.wait_event);
+ vhost_work_init(&flush.work, vhost_flush_work);
+
+ if (vhost_work_queue(dev, &flush.work))
+ wait_for_completion(&flush.wait_event);
+}
+EXPORT_SYMBOL_GPL(vhost_dev_flush);
+
/* A lockless hint for busy polling code to exit the loop */
bool vhost_vq_has_work(struct vhost_virtqueue *vq)
{
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 37c183b37c42..6a1ae8ae9c7d 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -198,6 +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_work_queue(struct vhost_virtqueue *vq, struct vhost_work *work);
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 *);
--
2.25.1
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