vhost: generialize backend features setting/getting
Move the backend features setting/getting from net.c to vhost.c to be
reused by vhost-vdpa.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200804162048.22587-3-eli@mellanox.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 8f62206..5e5cc3d 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -2591,6 +2591,21 @@ struct vhost_msg_node *vhost_dequeue_msg(struct vhost_dev *dev,
}
EXPORT_SYMBOL_GPL(vhost_dequeue_msg);
+void vhost_set_backend_features(struct vhost_dev *dev, u64 features)
+{
+ struct vhost_virtqueue *vq;
+ int i;
+
+ mutex_lock(&dev->mutex);
+ for (i = 0; i < dev->nvqs; ++i) {
+ vq = dev->vqs[i];
+ mutex_lock(&vq->mutex);
+ vq->acked_backend_features = features;
+ mutex_unlock(&vq->mutex);
+ }
+ mutex_unlock(&dev->mutex);
+}
+EXPORT_SYMBOL_GPL(vhost_set_backend_features);
static int __init vhost_init(void)
{