This is a note to let you know that I've just added the patch titled
Documentation/x86: Fix backwards on/off logic about YMM support
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
documentation-x86-fix-backwards-on-off-logic-about-ymm-support.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1b0fc0345f2852ffe54fb9ae0e12e2ee69ad6a20 Mon Sep 17 00:00:00 2001
From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Date: Tue, 1 Aug 2023 07:31:07 -0700
Subject: Documentation/x86: Fix backwards on/off logic about YMM support
From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
commit 1b0fc0345f2852ffe54fb9ae0e12e2ee69ad6a20 upstream
These options clearly turn *off* XSAVE YMM support. Correct the
typo.
Reported-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Fixes: 553a5c03e90a ("x86/speculation: Add force option to GDS mitigation")
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
Documentation/admin-guide/hw-vuln/gather_data_sampling.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/Documentation/admin-guide/hw-vuln/gather_data_sampling.rst
+++ b/Documentation/admin-guide/hw-vuln/gather_data_sampling.rst
@@ -63,7 +63,7 @@ GDS can also be mitigated on systems tha
disabling AVX. This can be done by setting gather_data_sampling="force" or
"clearcpuid=avx" on the kernel command-line.
-If used, these options will disable AVX use by turning on XSAVE YMM support.
+If used, these options will disable AVX use by turning off XSAVE YMM support.
However, the processor will still enumerate AVX support. Userspace that
does not follow proper AVX enumeration to check both AVX *and* XSAVE YMM
support will break.
Patches currently in stable-queue which might be from dave.hansen@xxxxxxxxxxxxxxx are
queue-5.10/x86-speculation-add-kconfig-option-for-gds.patch
queue-5.10/documentation-x86-fix-backwards-on-off-logic-about-ymm-support.patch
queue-5.10/x86-speculation-add-gather-data-sampling-mitigation.patch
queue-5.10/kvm-add-gds_no-support-to-kvm.patch
queue-5.10/x86-speculation-add-force-option-to-gds-mitigation.patch
