cxl/memdev: Only show sanitize sysfs files when supported

[platform/kernel/linux-starfive.git] / Documentation / ABI / testing / sysfs-bus-cxl

diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl
index 6350dd8..087f762 100644 (file)
--- a/Documentation/ABI/testing/sysfs-bus-cxl
+++ b/Documentation/ABI/testing/sysfs-bus-cxl
@@ -82,7 +82,12 @@ Description:
                whether it resides in persistent capacity, volatile capacity,
                or the LSA, is made permanently unavailable by whatever means
                is appropriate for the media type. This functionality requires
-               the device to be not be actively decoding any HPA ranges.
+               the device to be disabled, that is, not actively decoding any
+               HPA ranges. This permits avoiding explicit global CPU cache
+               management, relying instead for it to be done when a region
+               transitions between software programmed and hardware committed
+               states. If this file is not present, then there is no hardware
+               support for the operation.
 
 
 What            /sys/bus/cxl/devices/memX/security/erase
@@ -92,7 +97,13 @@ Contact:        linux-cxl@vger.kernel.org
 Description:
                (WO) Write a boolean 'true' string value to this attribute to
                secure erase user data by changing the media encryption keys for
-               all user data areas of the device.
+               all user data areas of the device. This functionality requires
+               the device to be disabled, that is, not actively decoding any
+               HPA ranges. This permits avoiding explicit global CPU cache
+               management, relying instead for it to be done when a region
+               transitions between software programmed and hardware committed
+               states. If this file is not present, then there is no hardware
+               support for the operation.
 
 
 What:          /sys/bus/cxl/devices/memX/firmware/