x86/bugs: Restructure retbleed mitigation

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Restructure retbleed mitigation to use select/update/apply functions to create
consistent vulnerability handling.  The retbleed_update_mitigation()
simplifies the dependency between spectre_v2 and retbleed.

The command line options now directly select a preferred mitigation
which simplifies the logic.

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/20250418161721.1855190-11-david.kaplan@amd.com

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David Kaplan 2025-04-18 11:17:15 -05:00 • committed by Borislav Petkov (AMD)

parent 83d4b19331

commit e3b78a7ad5

1 changed files with 98 additions and 97 deletions

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arch/x86/kernel/cpu/bugs.c

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