1 files changed, 44 insertions, 0 deletions
diff --git a/docs/interop/vhost-user.rst b/docs/interop/vhost-user.rst
index 3b1b6602c7..688b7c6900 100644
--- a/docs/interop/vhost-user.rst
+++ b/docs/interop/vhost-user.rst
@@ -815,6 +815,7 @@ Protocol features
   #define VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD       12
   #define VHOST_USER_PROTOCOL_F_RESET_DEVICE         13
   #define VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS 14
+  #define VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS  15
 
 Master message types
 --------------------
@@ -1263,6 +1264,49 @@ Master message types
 
   The state.num field is currently reserved and must be set to 0.
 
+``VHOST_USER_GET_MAX_MEM_SLOTS``
+  :id: 36
+  :equivalent ioctl: N/A
+  :slave payload: u64
+
+  When the ``VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS`` protocol
+  feature has been successfully negotiated, this message is submitted
+  by master to the slave. The slave should return the message with a
+  u64 payload containing the maximum number of memory slots for
+  QEMU to expose to the guest. The value returned by the backend
+  will be capped at the maximum number of ram slots which can be
+  supported by the target platform.
+
+``VHOST_USER_ADD_MEM_REG``
+  :id: 37
+  :equivalent ioctl: N/A
+  :slave payload: memory region
+
+  When the ``VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS`` protocol
+  feature has been successfully negotiated, this message is submitted
+  by the master to the slave. The message payload contains a memory
+  region descriptor struct, describing a region of guest memory which
+  the slave device must map in. When the
+  ``VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS`` protocol feature has
+  been successfully negotiated, along with the
+  ``VHOST_USER_REM_MEM_REG`` message, this message is used to set and
+  update the memory tables of the slave device.
+
+``VHOST_USER_REM_MEM_REG``
+  :id: 38
+  :equivalent ioctl: N/A
+  :slave payload: memory region
+
+  When the ``VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS`` protocol
+  feature has been successfully negotiated, this message is submitted
+  by the master to the slave. The message payload contains a memory
+  region descriptor struct, describing a region of guest memory which
+  the slave device must unmap. When the
+  ``VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS`` protocol feature has
+  been successfully negotiated, along with the
+  ``VHOST_USER_ADD_MEM_REG`` message, this message is used to set and
+  update the memory tables of the slave device.
+
 Slave message types
 -------------------