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Commit 3e21d8b0 authored by Dave Hansen's avatar Dave Hansen Committed by Greg Kroah-Hartman
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Documentation/x86: Fix backwards on/off logic about YMM support 



commit 1b0fc0345f2852ffe54fb9ae0e12e2ee69ad6a20 upstream

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

Reported-by: default avatarBen Hutchings <ben@decadent.org.uk>
Fixes: 553a5c03e90a ("x86/speculation: Add force option to GDS mitigation")
Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ad7670dd

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.