[PATCH v3 3/3] spec/vhost-user: add the VHOST_USER_SET_VHOST_PCI message

The VHOST_USER_SET_VHOST_PCI message is introduced to start/stop
the vhost-pci based inter-VM communiaction by the master.

Signed-off-by: Wei Wang <>
---
 docs/specs/vhost-user.txt | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
index 80dcfc1..4e2ce60 100644
--- a/docs/specs/vhost-user.txt
+++ b/docs/specs/vhost-user.txt
@@ -490,6 +490,18 @@ Message types
       This request should be sent only when VHOST_USER_PROTOCOL_F_SET_DEVICE_ID
       has been negotiated.
 
+ * VHOST_USER_SET_VHOST_PCI
+
+      Id: 21
+      Equivalent ioctl: N/A
+      Master payload: u64
+
+      The master requests the slave to start or stop the vhost-pci device for
+      the inter-VM communication.
+      This request should be sent only when VHOST_USER_PROTOCOL_F_VHOST_PCI has
+      been negotiated.
+
+
 VHOST_USER_PROTOCOL_F_REPLY_ACK:
 -------------------------------
 The original vhost-user specification only demands replies for certain
-- 
2.7.4