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-rw-r--r--docs/specs/vhost-user.txt12
1 files changed, 11 insertions, 1 deletions
diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
index cfc9d411ff..4eadad1d6b 100644
--- a/docs/specs/vhost-user.txt
+++ b/docs/specs/vhost-user.txt
@@ -148,7 +148,9 @@ VHOST_USER_GET_PROTOCOL_FEATURES. Master should stop when the number of
requested queues is bigger than that.
As all queues share one connection, the master uses a unique index for each
-queue in the sent message to identify a specified queue.
+queue in the sent message to identify a specified queue. One queue pair
+is enabled initially. More queues are enabled dynamically, by sending
+message VHOST_USER_SET_VRING_ENABLE.
Message types
-------------
@@ -327,3 +329,11 @@ Message types
Query how many queues the backend supports. This request should be
sent only when VHOST_USER_PROTOCOL_F_MQ is set in quried protocol
features by VHOST_USER_GET_PROTOCOL_FEATURES.
+
+ * VHOST_USER_SET_VRING_ENABLE
+
+ Id: 18
+ Equivalent ioctl: N/A
+ Master payload: vring state description
+
+ Signal slave to enable or disable corresponding vring.