int vhost_backend_invalidate_device_iotlb(struct vhost_dev *dev, uint64_t iova, uint64_t len) { struct vhost_iotlb_msg imsg; imsg.iova = iova; imsg.size = len; imsg.type = VHOST_IOTLB_INVALIDATE; return dev->vhost_ops->vhost_send_device_iotlb_msg(dev, &imsg); }