[Qemu-devel] [PATCH 1/2] virtio: invalidate memory in vring_set_avail_event()

[Stefan Hajnoczi]

Remember to invalidate the avail event field so the memory pages are
marked dirty.

Cc: Paolo Bonzini <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
 hw/virtio/virtio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 23483c7..da5c6fe 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -282,6 +282,7 @@ static inline void vring_set_avail_event(VirtQueue *vq, 
uint16_t val)
     caches = atomic_rcu_read(&vq->vring.caches);
     pa = offsetof(VRingUsed, ring[vq->vring.num]);
     virtio_stw_phys_cached(vq->vdev, &caches->used, pa, val);
+    address_space_cache_invalidate(&caches->used, pa, sizeof(val));
 }
 
 void virtio_queue_set_notification(VirtQueue *vq, int enable)
-- 
2.9.3