2 files changed, 48 insertions, 0 deletions
diff --git a/docs/interop/vhost-user.json b/docs/interop/vhost-user.json
index da6aaf5..ce0ef74 100644
--- a/docs/interop/vhost-user.json
+++ b/docs/interop/vhost-user.json
@@ -55,6 +55,37 @@
 }
 
 ##
+# @VHostUserBackendBlockFeature:
+#
+# List of vhost user "block" features.
+#
+# @read-only: The --read-only command line option is supported.
+# @blk-file: The --blk-file command line option is supported.
+#
+# Since: 5.0
+##
+{
+  'enum': 'VHostUserBackendBlockFeature',
+  'data': [ 'read-only', 'blk-file' ]
+}
+
+##
+# @VHostUserBackendCapabilitiesBlock:
+#
+# Capabilities reported by vhost user "block" backends
+#
+# @features: list of supported features.
+#
+# Since: 5.0
+##
+{
+  'struct': 'VHostUserBackendCapabilitiesBlock',
+  'data': {
+    'features': [ 'VHostUserBackendBlockFeature' ]
+  }
+}
+
+##
 # @VHostUserBackendInputFeature:
 #
 # List of vhost user "input" features.
diff --git a/docs/interop/vhost-user.rst b/docs/interop/vhost-user.rst
index 7827b71..015ac08 100644
--- a/docs/interop/vhost-user.rst
+++ b/docs/interop/vhost-user.rst
@@ -1376,3 +1376,20 @@ Command line options:
   Enable virgl rendering support.
 
   (optional)
+
+vhost-user-blk
+--------------
+
+Command line options:
+
+--blk-file=PATH
+
+  Specify block device or file path.
+
+  (optional)
+
+--read-only
+
+  Enable read-only.
+
+  (optional)