arm64: Add helpers to probe local CPU for PAC and BTI support

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Add some helpers that will be used by the early kernel mapping code to
check feature support on the local CPU. This permits the early kernel
mapping to be created with the right attributes, removing the need for
tearing it down and recreating it.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20240214122845.2033971-58-ardb+git@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Ard Biesheuvel 2024-02-14 13:28:59 +01:00 • committed by Catalin Marinas

parent 9ddd9baa42

commit a669c6a493

1 changed files with 32 additions and 0 deletions

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arch/arm64/include/asm/cpufeature.h

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