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.christie@xxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
---
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 aefb52952e1d..faf1dcf0af30 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -231,6 +231,34 @@ void vhost_poll_stop(struct vhost_poll *poll)
}
EXPORT_SYMBOL_GPL(vhost_poll_stop);
+static void vhost_work_queue_on(struct vhost_worker *worker,
+ struct vhost_work *work)
+{
+ if (!worker)
+ return;
+
+ if (!test_and_set_bit(VHOST_WORK_QUEUED, &work->flags)) {
+ /* We can only add the work to the list after we're
+ * sure it was not in the list.
+ * test_and_set_bit() implies a memory barrier.
+ */
+ llist_add(&work->node, &worker->work_list);
+ wake_up_process(worker->vtsk->task);
+ }
+}
+
+void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work)
+{
+ vhost_work_queue_on(dev->worker, work);
+}
+EXPORT_SYMBOL_GPL(vhost_work_queue);
+
+void vhost_vq_work_queue(struct vhost_virtqueue *vq, struct vhost_work *work)
+{
+ vhost_work_queue_on(vq->worker, work);
+}
+EXPORT_SYMBOL_GPL(vhost_vq_work_queue);
+
void vhost_dev_flush(struct vhost_dev *dev)
{
struct vhost_flush_struct flush;
@@ -245,22 +273,6 @@ void vhost_dev_flush(struct vhost_dev *dev)
}
EXPORT_SYMBOL_GPL(vhost_dev_flush);
-void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work)
-{
- if (!dev->worker)
- return;
-
- if (!test_and_set_bit(VHOST_WORK_QUEUED, &work->flags)) {
- /* We can only add the work to the list after we're
- * sure it was not in the list.
- * test_and_set_bit() implies a memory barrier.
- */
- llist_add(&work->node, &dev->worker->work_list);
- wake_up_process(dev->worker->vtsk->task);
- }
-}
-EXPORT_SYMBOL_GPL(vhost_work_queue);
-
/* 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 0dde119fb0ee..b64ee4ef387d 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -194,6 +194,7 @@ 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);
+void 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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