[libvirt] [PATCH v2 4/4] Documentation/vfio-mediated-device.txt: update for aggregation attribute

[Zhenyu Wang]

Update mdev doc on new aggregration attribute and instances attribute
for mdev.

Cc: Kirti Wankhede <kwankhede at nvidia.com>
Cc: Alex Williamson <alex.williamson at redhat.com>
Cc: Kevin Tian <kevin.tian at intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
---
 Documentation/vfio-mediated-device.txt | 39 ++++++++++++++++++++++----
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/Documentation/vfio-mediated-device.txt b/Documentation/vfio-mediated-device.txt
index c3f69bcaf96e..9ec9495dcbe7 100644
--- a/Documentation/vfio-mediated-device.txt
+++ b/Documentation/vfio-mediated-device.txt
@@ -211,12 +211,20 @@ Directories and files under the sysfs for Each Physical Device
   |     |   |--- description
   |     |   |--- [devices]
   |     |--- [<type-id>]
-  |          |--- create
-  |          |--- name
-  |          |--- available_instances
-  |          |--- device_api
-  |          |--- description
-  |          |--- [devices]
+  |     |    |--- create
+  |     |    |--- name
+  |     |    |--- available_instances
+  |     |    |--- device_api
+  |     |    |--- description
+  |     |    |--- [devices]
+  |     |--- [<type-id>]
+  |     |    |--- create
+  |     |    |--- name
+  |     |    |--- available_instances
+  |     |    |--- device_api
+  |     |    |--- description
+  |     |    |--- <aggregation>
+  |     |    |--- [devices]
 
 * [mdev_supported_types]
 
@@ -260,6 +268,19 @@ Directories and files under the sysfs for Each Physical Device
   This attribute should show brief features/description of the type. This is
   optional attribute.
 
+* <aggregation>
+
+  The description is to show feature for one instance of the type. <aggregation>
+  is an optional attributes to show that [<type-id>]'s instances can be
+  aggregated to be assigned for one mdev device. Set number of instances by
+  appending "instances=N" parameter for create. Instances number can't exceed
+  available_instances number. Without "instances=N" parameter will be default
+  one instance to create.
+
+Example::
+
+	# echo "<uuid>,instances=N" > create
+
 Directories and Files Under the sysfs for Each mdev Device
 ----------------------------------------------------------
 
@@ -268,6 +289,7 @@ Directories and Files Under the sysfs for Each mdev Device
   |- [parent phy device]
   |--- [$MDEV_UUID]
          |--- remove
+	 |--- instances
          |--- mdev_type {link to its type}
          |--- vendor-specific-attributes [optional]
 
@@ -281,6 +303,11 @@ Example::
 
 	# echo 1 > /sys/bus/mdev/devices/$mdev_UUID/remove
 
+* instances
+
+For aggregation type show number of instances assigned for this mdev. For normal
+type or default will just show one instance.
+
 Mediated device Hot plug
 ------------------------
 
-- 
2.18.0