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(parent: 331cfdd) | 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 14:05:14 +0000 (16:05 +0200)
commit0029b3c1320bb9cf6ce1e9bf93dadd909ca06fa1
tree6c25246b79a1065c47c2abbee25364d85d17b901tree | snapshot
parent331cfdd27429ed7a64923123b2482e85238979facommit | 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