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(parent: 5c30f03) | patch
x86/process: Move the buffer clearing before MONITOR
authorBorislav Petkov (AMD) <bp@alien8.de>
Mon, 14 Apr 2025 13:33:19 +0000 (15:33 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 10 Jul 2025 13:59:54 +0000 (15:59 +0200)
commit41d49d4e6abf4fbfe76ad09a4dbedaf749ad11a1
treed65372d74df469a8e71b3597033114a28dfc08a9tree
parent5c30f037bc0dde32517febb9fdebf02fbcf24959commit | diff
x86/process: Move the buffer clearing before MONITOR

Commit 8e786a85c0a3c0fffae6244733fb576eeabd9dec upstream.

Move the VERW clearing before the MONITOR so that VERW doesn't disarm it
and the machine never enters C1.

Original idea by Kim Phillips <kim.phillips@amd.com>.

Suggested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/x86/include/asm/mwait.h diff | blob | blame | history
arch/x86/kernel/process.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git