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virtio: invalidate memory in vring_set_avail_event()

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

Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2017-02-22 16:37:33 +00:00 committed by Michael S. Tsirkin
parent 34c6bf22a8
commit 3cdf847329
1 changed files with 1 additions and 0 deletions
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hw/virtio/virtio.c
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@ -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)