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(parent: 025d5ac) | patch
x86/cpu: Fix AMD erratum #1485 on Zen4-based CPUs
authorBorislav Petkov (AMD) <bp@alien8.de>
Sat, 7 Oct 2023 10:57:02 +0000 (12:57 +0200)
committerBorislav Petkov (AMD) <bp@alien8.de>
Wed, 11 Oct 2023 09:00:11 +0000 (11:00 +0200)
commitf454b18e07f518bcd0c05af17a2239138bff52de
tree40a451e8c48c061044510f55109a206ed049d5fftree | snapshot
parent025d5ac978cc3b47874cc1c03ab096a78b49f278commit | diff
x86/cpu: Fix AMD erratum #1485 on Zen4-based CPUs

Fix erratum #1485 on Zen4 parts where running with STIBP disabled can
cause an #UD exception. The performance impact of the fix is negligible.

Reported-by: René Rebe <rene@exactcode.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: René Rebe <rene@exactcode.de>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/r/D99589F4-BC5D-430B-87B2-72C20370CF57@exactcode.com
arch/x86/include/asm/msr-index.h diff | blob | blame | history
arch/x86/kernel/cpu/amd.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)