Commit e7f6706b authored Mar 26, 2018 by Suzuki K Poulose Committed by Isaac J. Manjarres May 30, 2018

arm64: capabilities: Add support for checks based on a list of MIDRs

Add helpers for detecting an errata on list of midr ranges
of affected CPUs, with the same work around.

Change-Id: I3f2ef42a19b319ca35fccf715ee14bef85eaf671
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Dave Martin <dave.martin@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Git-commit: be5b2998
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

[isaacm@codeaurora.org: remove code that is not needed for
 having a way of expressing the list of CPUs that would
 be impacted by erratum 1024718.]
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>

parent f7806105

arch/arm64/include/asm/cputype.h

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -149,6 +149,15 @@ static inline bool is_midr_in_range(u32 midr, struct midr_range const *range)
	range->rv_min, range->rv_max);		range->rv_min, range->rv_max);
	}		}

			static inline bool
			is_midr_in_range_list(u32 midr, struct midr_range const *ranges)
			{
			while (ranges->model)
			if (is_midr_in_range(midr, ranges++))
			return true;
			return false;
			}

	/*		/*
	* The CPU ID never changes at run time, so we might as well tell the		* The CPU ID never changes at run time, so we might as well tell the
	* compiler that it's constant. Use this function to read the CPU ID		* compiler that it's constant. Use this function to read the CPU ID