arm64: Expose ARMv8.5 CondM capability to userspace

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ARMv8.5 adds new instructions XAFLAG and AXFLAG to translate the
representation of the results of floating point comparisons between the
native ARM format and an alternative format used by some software. Add
a hwcap allowing userspace to determine if they are present, since we
referred to earlier CondM extensions as FLAGM call these extensions
FLAGM2.

Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Mark Brown 2019-06-18 19:10:54 +01:00 • committed by Catalin Marinas

parent 8049672bb1

commit 1201937491

5 changed files with 8 additions and 0 deletions

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4

Documentation/arm64/elf_hwcaps.txt

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arch/arm64/include/asm/hwcap.h

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

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arch/arm64/kernel/cpufeature.c

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arch/arm64/kernel/cpuinfo.c

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