arm64: Expose DC CVADP to userspace

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ARMv8.5 builds upon the ARMv8.2 DC CVAP instruction by introducing a DC
CVADP instruction which cleans the data cache to the point of deep
persistence. Let's expose this support via the arm64 ELF hwcaps.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Andrew Murray 2019-04-09 10:52:43 +01:00 • committed by Will Deacon

parent d16ed4105f

commit 671db58181

5 changed files with 12 additions and 0 deletions

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4

Documentation/arm64/elf_hwcaps.txt

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1

arch/arm64/include/asm/hwcap.h

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5

arch/arm64/include/uapi/asm/hwcap.h

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1

arch/arm64/kernel/cpufeature.c

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arch/arm64/kernel/cpuinfo.c

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