vhost: replace SMP with thread fence for control path

[dpdk.git] / lib / librte_vhost / vhost.h

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 361c9f7..23e11ff 100644 (file)
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -728,7 +728,7 @@ static __rte_always_inline void
 vhost_vring_call_split(struct virtio_net *dev, struct vhost_virtqueue *vq)
 {
        /* Flush used->idx update before we read avail->flags. */
-       rte_smp_mb();
+       rte_atomic_thread_fence(__ATOMIC_SEQ_CST);
 
        /* Don't kick guest if we don't reach index specified by guest. */
        if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) {
@@ -770,7 +770,7 @@ vhost_vring_call_packed(struct virtio_net *dev, struct vhost_virtqueue *vq)
        bool signalled_used_valid, kick = false;
 
        /* Flush used desc update. */
-       rte_smp_mb();
+       rte_atomic_thread_fence(__ATOMIC_SEQ_CST);
 
        if (!(dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))) {
                if (vq->driver_event->flags !=
@@ -796,7 +796,7 @@ vhost_vring_call_packed(struct virtio_net *dev, struct vhost_virtqueue *vq)
                goto kick;
        }
 
-       rte_smp_rmb();
+       rte_atomic_thread_fence(__ATOMIC_ACQUIRE);
 
        off_wrap = vq->driver_event->off_wrap;
        off = off_wrap & ~(1 << 15);