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author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-06-14 07:43:15 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-06-14 07:43:15 -0700 |
commit | 8e8afafb0b5571b7cb10b529dc60cadb7241bed4 (patch) | |
tree | ea734a6acea7f51e82921cc7120988d6d76f0b49 /arch/x86/include/asm/cpufeatures.h | |
parent | b13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3 (diff) | |
parent | 1dc6ff02c8bf77d71b9b5d11cbc9df77cfb28626 (diff) | |
download | linux-stable-8e8afafb0b5571b7cb10b529dc60cadb7241bed4.tar.gz linux-stable-8e8afafb0b5571b7cb10b529dc60cadb7241bed4.tar.bz2 linux-stable-8e8afafb0b5571b7cb10b529dc60cadb7241bed4.zip |
Merge tag 'x86-bugs-2022-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 MMIO stale data fixes from Thomas Gleixner:
"Yet another hw vulnerability with a software mitigation: Processor
MMIO Stale Data.
They are a class of MMIO-related weaknesses which can expose stale
data by propagating it into core fill buffers. Data which can then be
leaked using the usual speculative execution methods.
Mitigations include this set along with microcode updates and are
similar to MDS and TAA vulnerabilities: VERW now clears those buffers
too"
* tag 'x86-bugs-2022-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/speculation/mmio: Print SMT warning
KVM: x86/speculation: Disable Fill buffer clear within guests
x86/speculation/mmio: Reuse SRBDS mitigation for SBDS
x86/speculation/srbds: Update SRBDS mitigation selection
x86/speculation/mmio: Add sysfs reporting for Processor MMIO Stale Data
x86/speculation/mmio: Enable CPU Fill buffer clearing on idle
x86/bugs: Group MDS, TAA & Processor MMIO Stale Data mitigations
x86/speculation/mmio: Add mitigation for Processor MMIO Stale Data
x86/speculation: Add a common function for MD_CLEAR mitigation update
x86/speculation/mmio: Enumerate Processor MMIO Stale Data bug
Documentation: Add documentation for Processor MMIO Stale Data
Diffstat (limited to 'arch/x86/include/asm/cpufeatures.h')
-rw-r--r-- | arch/x86/include/asm/cpufeatures.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 393f2bbb5e3a..03acc823838a 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -446,5 +446,6 @@ #define X86_BUG_TAA X86_BUG(22) /* CPU is affected by TSX Async Abort(TAA) */ #define X86_BUG_ITLB_MULTIHIT X86_BUG(23) /* CPU may incur MCE during certain page attribute changes */ #define X86_BUG_SRBDS X86_BUG(24) /* CPU may leak RNG bits if not mitigated */ +#define X86_BUG_MMIO_STALE_DATA X86_BUG(25) /* CPU is affected by Processor MMIO Stale Data vulnerabilities */ #endif /* _ASM_X86_CPUFEATURES_H */ |