+/**
+ * Notify the guest that should get virtio configuration space from backend.
+ *
+ * @param vid
+ * vhost device ID
+ * @param need_reply
+ * wait for the master response the status of this operation
+ * @return
+ * 0 on success, < 0 on failure
+ */
+__rte_experimental
+int
+rte_vhost_slave_config_change(int vid, bool need_reply);
+