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docs: vhost-user: add Virtio status protocol feature 

This patch specifies the VHOST_USER_SET_STATUS and
VHOST_USER_GET_STATUS requests, which are sent by
the master to update and query the Virtio status
in the backend.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Message-Id: <20200618134501.145747-1-maxime.coquelin@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Maxime Coquelin 2020-06-18 15:45:01 +02:00 committed by Michael S. Tsirkin
parent 3e1dc4d55e
commit 553dc662bb
1 changed files with 24 additions and 0 deletions
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docs/interop/vhost-user.rst
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@ -816,6 +816,7 @@ Protocol features
#define VHOST_USER_PROTOCOL_F_RESET_DEVICE 13 #define VHOST_USER_PROTOCOL_F_RESET_DEVICE 13
#define VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS 14 #define VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS 14
#define VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS 15 #define VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS 15
#define VHOST_USER_PROTOCOL_F_STATUS 16
Master message types Master message types
-------------------- --------------------
@ -1307,6 +1308,29 @@ Master message types
``VHOST_USER_ADD_MEM_REG`` message, this message is used to set and ``VHOST_USER_ADD_MEM_REG`` message, this message is used to set and
update the memory tables of the slave device. update the memory tables of the slave device.
``VHOST_USER_SET_STATUS``
:id: 39
:equivalent ioctl: VHOST_VDPA_SET_STATUS
:slave payload: N/A
:master payload: ``u64``
When the ``VHOST_USER_PROTOCOL_F_STATUS`` protocol feature has been
successfully negotiated, this message is submitted by the master to
notify the backend with updated device status as defined in the Virtio
specification.
``VHOST_USER_GET_STATUS``
:id: 40
:equivalent ioctl: VHOST_VDPA_GET_STATUS
:slave payload: ``u64``
:master payload: N/A
When the ``VHOST_USER_PROTOCOL_F_STATUS`` protocol feature has been
successfully negotiated, this message is submitted by the master to
query the backend for its device status as defined in the Virtio
specification.
Slave message types Slave message types
------------------- -------------------