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[Qemu-devel] [PATCH v3 2/3] spec/vhost-user: add VHOST_USER_PROTOCOL_F_S
From: |
Wei Wang |
Subject: |
[Qemu-devel] [PATCH v3 2/3] spec/vhost-user: add VHOST_USER_PROTOCOL_F_SET_DEVICE_ID |
Date: |
Mon, 19 Dec 2016 19:05:53 +0800 |
The VHOST_USER_PROTOCOL_F_SET_DEVICE_ID protocol feature indicates
that the slave side implementation supports different types of devices.
The master tells the slave what type of device to create by sending
a VHOST_USER_SET_DEVICE_ID message.
Signed-off-by: Wei Wang <address@hidden>
---
docs/specs/vhost-user.txt | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
index 18e49d0..80dcfc1 100644
--- a/docs/specs/vhost-user.txt
+++ b/docs/specs/vhost-user.txt
@@ -267,6 +267,7 @@ Protocol features
#define VHOST_USER_PROTOCOL_F_RARP 2
#define VHOST_USER_PROTOCOL_F_REPLY_ACK 3
#define VHOST_USER_PROTOCOL_F_VHOST_PCI 4
+#define VHOST_USER_PROTOCOL_F_SET_DEVICE_ID 5
Message types
-------------
@@ -479,6 +480,16 @@ Message types
The first 6 bytes of the payload contain the mac address of the guest to
allow the vhost user backend to construct and broadcast the fake RARP.
+ * VHOST_USER_SET_DEVICE_ID
+ Id: 20
+ Equivalent ioctl: N/A
+ Master payload: u64
+
+ The master sends the virtio device id to the slave. The virtio device id
+ indicates the device type of the master device.
+ This request should be sent only when VHOST_USER_PROTOCOL_F_SET_DEVICE_ID
+ has been negotiated.
+
VHOST_USER_PROTOCOL_F_REPLY_ACK:
-------------------------------
The original vhost-user specification only demands replies for certain
--
2.7.4