x86/bugs: Restructure spectre_v2_user mitigation

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Restructure spectre_v2_user to use select/update/apply functions to
create consistent vulnerability handling.

The IBPB/STIBP choices are first decided based on the spectre_v2_user
command line but can be modified by the spectre_v2 command line option
as well.

Signed-off-by: David Kaplan <david.kaplan@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lore.kernel.org/20250418161721.1855190-12-david.kaplan@amd.com

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David Kaplan 2025-04-18 11:17:16 -05:00 • committed by Borislav Petkov (AMD)

parent e3b78a7ad5

commit ddfca9430a

1 changed files with 94 additions and 74 deletions

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arch/x86/kernel/cpu/bugs.c

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