arm64: kernel: Add cpuid_feature_extract_field() for 4bit sign extension

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Based on arch/arm/include/asm/cputype.h, this function does the
shifting and sign extension necessary when accessing cpu feature fields.

Signed-off-by: James Morse <james.morse@arm.com>
Suggested-by: Russell King <linux@arm.linux.org.uk>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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James Morse 2015-07-21 13:23:26 +01:00 • committed by Will Deacon

parent ae2fb7ece9

commit 79b0e09a3c

1 changed files with 7 additions and 0 deletions

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arch/arm64/include/asm/cpufeature.h

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