[PATCH 3.16 70/86] x86/speculation/l1tf: Document l1tf in sysfs

[Ben Hutchings]

3.16.68-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>

The vulnerabilties/l1tf attribute was added by commit 17dbca119312
"x86/speculation/l1tf: Add sysfs reporting for l1tf", which has
already been backported to 3.16, but only documented in commit
d90a7a0ec83f "x86/bugs, kvm: Introduce boot-time control of L1TF
mitigations", which has not and probbaly won't be.

Add just that line of documentation for now.

Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -230,6 +230,7 @@ What:		/sys/devices/system/cpu/vulnerabi
 		/sys/devices/system/cpu/vulnerabilities/spectre_v1
 		/sys/devices/system/cpu/vulnerabilities/spectre_v2
 		/sys/devices/system/cpu/vulnerabilities/spec_store_bypass
+		/sys/devices/system/cpu/vulnerabilities/l1tf
 Date:		January 2018
 Contact:	Linux kernel mailing list <linux-kernel@xxxxxxxxxxxxxxx>
 Description:	Information about CPU vulnerabilities