[PATCH 2/2] cxl: Document missing sysfs files

[Davidlohr Bueso <dave@stgolabs.net>]

Add to the ABI documentation the payload_max and label_storage_size
read-only files, which have been there since the early days.

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
---
 Documentation/ABI/testing/sysfs-bus-cxl | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl
index 7bdf0eb79d7c..04a880bd1dde 100644
--- a/Documentation/ABI/testing/sysfs-bus-cxl
+++ b/Documentation/ABI/testing/sysfs-bus-cxl
@@ -18,6 +18,24 @@ Description:
 		specification.
 
 
+What:		/sys/bus/cxl/devices/memX/payload_max
+Date:		December, 2020
+KernelVersion:	v5.12
+Contact:	linux-cxl@vger.kernel.org
+Description:
+		(RO) Maximum size (in bytes) of the mailbox command payload
+		registers. Linux caps this at 1MB if the device reports a
+		larger size.
+
+
+What:		/sys/bus/cxl/devices/memX/label_storage_size
+Date:		May, 2021
+KernelVersion:	v5.13
+Contact:	linux-cxl@vger.kernel.org
+Description:
+		(RO) Size (in bytes) of the Label Storage Area (LSA).
+
+
 What:		/sys/bus/cxl/devices/memX/ram/size
 Date:		December, 2020
 KernelVersion:	v5.12
-- 
2.39.5