x86/alternatives: Catch late X86_FEATURE modifiers

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After alternatives have been patched, changes to the X86_FEATURE flags
won't take effect and could potentially even be wrong.

Warn about it.

This is something which has been long overdue.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Srikanth Aithal <sraithal@amd.com>
Link: https://lore.kernel.org/r/20240327154317.29909-3-bp@alien8.de

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This commit is contained in:

Borislav Petkov (AMD) 2024-03-27 16:43:14 +01:00

parent fec50db703

commit ee8962082a

2 changed files with 9 additions and 2 deletions

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8

arch/x86/include/asm/cpufeature.h

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3

arch/x86/kernel/cpu/cpuid-deps.c

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