Commit a7051ecd authored Sep 02, 2023 by Dave Hansen Committed by Zeng Heng Sep 02, 2023

Documentation/x86: Fix backwards on/off logic about YMM support

mainline inclusion
from mainline-v6.5-rc6
commit 1b0fc034
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7XLNT
CVE: CVE-2022-40982

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1b0fc0345f2852ffe54fb9ae0e12e2ee69ad6a20



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

commit 1b0fc034 upstream

These options clearly turn *off* XSAVE YMM support.  Correct the
typo.

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Fixes: 553a5c03 ("x86/speculation: Add force option to GDS mitigation")
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zeng Heng <zengheng4@huawei.com>

parent f92ed284

Documentation/admin-guide/hw-vuln/gather_data_sampling.rst

+1 −1

Original line number	Diff line number	Diff line
		@@ -63,7 +63,7 @@ GDS can also be mitigated on systems that don't have updated microcode by
		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.