+bool vhost_user_iotlb_pending_miss(struct vhost_virtqueue *vq, uint64_t iova,
+ uint8_t perm);
+void vhost_user_iotlb_pending_insert(struct vhost_virtqueue *vq, uint64_t iova,
+ uint8_t perm);
+void vhost_user_iotlb_pending_remove(struct vhost_virtqueue *vq, uint64_t iova,
+ uint64_t size, uint8_t perm);
+