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x86/Kconfig: Add arch attack vector support 

ARCH_HAS_CPU_ATTACK_VECTORS should be set for architectures which implement
the new attack-vector based controls for CPU mitigations.  If an arch does
not support attack-vector based controls then an attempt to use them
results in a warning.

Signed-off-by: David Kaplan <david.kaplan@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20250707183316.1349127-4-david.kaplan@amd.com
This commit is contained in:
David Kaplan 2025-07-07 13:32:58 -05:00 committed by Borislav Petkov (AMD)
parent 19c24f7ee3
commit 735e59204b
2 changed files with 4 additions and 0 deletions
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3
arch/Kconfig
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@ -1763,4 +1763,7 @@ config ARCH_WANTS_PRE_LINK_VMLINUX
An architecture can select this if it provides arch/<arch>/tools/Makefile
with .arch.vmlinux.o target to be linked into vmlinux.
config ARCH_HAS_CPU_ATTACK_VECTORS
bool
endmenu

1
arch/x86/Kconfig
View File

@ -75,6 +75,7 @@ config X86
select ARCH_ENABLE_SPLIT_PMD_PTLOCK if (PGTABLE_LEVELS > 2) && (X86_64 || X86_PAE)
select ARCH_ENABLE_THP_MIGRATION if X86_64 && TRANSPARENT_HUGEPAGE
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
select ARCH_HAS_CPU_ATTACK_VECTORS if CPU_MITIGATIONS
select ARCH_HAS_CACHE_LINE_SIZE
select ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION
select ARCH_HAS_CPU_FINALIZE_INIT