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arm64: Add HWCAP for self-synchronising virtual counter

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Since userspace can make use of the CNTVSS_EL0 instruction, expose
it via a HWCAP.

Suggested-by: Will Deacon <will@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211017124225.3018098-18-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Marc Zyngier
2021-10-17 13:42:25 +01:00
committed by Will Deacon
parent ae976f063b
commit fee29f008a
6 changed files with 19 additions and 3 deletions
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arch/arm64/include/uapi/asm/hwcap.h
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@@ -75,5 +75,6 @@
#define HWCAP2_RNG (1 << 16)
#define HWCAP2_BTI (1 << 17)
#define HWCAP2_MTE (1 << 18)
#define HWCAP2_ECV (1 << 19)
#endif /* _UAPI__ASM_HWCAP_H */