diff options
| author | Joey Gouly <joey.gouly@arm.com> | 2021-12-10 19:54:30 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-12-13 21:52:59 +0300 |
| commit | 5c13f042e73200b50573ace63e1a6b94e2917616 (patch) | |
| tree | de22698982896d4808630041ca8797f2b522ca3b /arch/arm64/include | |
| parent | d58071a8a76d779eedab38033ae4c821c30295a5 (diff) | |
| download | linux-5c13f042e73200b50573ace63e1a6b94e2917616.tar.xz | |
arm64: cpufeature: add HWCAP for FEAT_AFP
Add a new HWCAP to detect the Alternate Floating-point Behaviour
feature (FEAT_AFP), introduced in Armv8.7.
Also expose this to userspace in the ID_AA64MMFR1_EL1 feature register.
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Will Deacon <will@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211210165432.8106-2-joey.gouly@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/hwcap.h | 1 | ||||
| -rw-r--r-- | arch/arm64/include/asm/sysreg.h | 1 | ||||
| -rw-r--r-- | arch/arm64/include/uapi/asm/hwcap.h | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h index b100e0055eab..2809df2fdd63 100644 --- a/arch/arm64/include/asm/hwcap.h +++ b/arch/arm64/include/asm/hwcap.h @@ -106,6 +106,7 @@ #define KERNEL_HWCAP_BTI __khwcap2_feature(BTI) #define KERNEL_HWCAP_MTE __khwcap2_feature(MTE) #define KERNEL_HWCAP_ECV __khwcap2_feature(ECV) +#define KERNEL_HWCAP_AFP __khwcap2_feature(AFP) /* * This yields a mask that user programs can use to figure out what diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 16b3f1a1d468..adcab9009f9d 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -889,6 +889,7 @@ #endif /* id_aa64mmfr1 */ +#define ID_AA64MMFR1_AFP_SHIFT 44 #define ID_AA64MMFR1_ETS_SHIFT 36 #define ID_AA64MMFR1_TWED_SHIFT 32 #define ID_AA64MMFR1_XNX_SHIFT 28 diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h index 7b23b16f21ce..180da7396549 100644 --- a/arch/arm64/include/uapi/asm/hwcap.h +++ b/arch/arm64/include/uapi/asm/hwcap.h @@ -76,5 +76,6 @@ #define HWCAP2_BTI (1 << 17) #define HWCAP2_MTE (1 << 18) #define HWCAP2_ECV (1 << 19) +#define HWCAP2_AFP (1 << 20) #endif /* _UAPI__ASM_HWCAP_H */ |