diff options
| author | Amit Daniel Kachhap <amit.kachhap@arm.com> | 2022-11-17 09:05:19 +0300 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-11-28 14:57:35 +0300 |
| commit | 3bda6d88489769fba5672dc66debdc1f5516c5fe (patch) | |
| tree | 3ee41cfa8dc802880cc0fb368e9027aa272e751a /arch/arm/include/uapi | |
| parent | 956ca3a4eb81c1b8cc3226af3083847544dcb098 (diff) | |
| download | linux-3bda6d88489769fba5672dc66debdc1f5516c5fe.tar.xz | |
ARM: 9273/1: Add hwcap for Speculation Barrier(SB)
Speculation Barrier(FEAT_SB) is a feature present in AArch32 state for
Armv8 and is represented by ISAR6.SB identification register.
This feature denotes the presence of SB instruction and hence adding a
hwcap will enable the userspace to check it before trying to use this
instruction.
This commit adds the ID feature bit detection, and uses elf_hwcap2
accordingly.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/include/uapi')
| -rw-r--r-- | arch/arm/include/uapi/asm/hwcap.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h index 46833c668ec2..bc9e7d318e25 100644 --- a/arch/arm/include/uapi/asm/hwcap.h +++ b/arch/arm/include/uapi/asm/hwcap.h @@ -43,5 +43,6 @@ #define HWCAP2_SHA1 (1 << 2) #define HWCAP2_SHA2 (1 << 3) #define HWCAP2_CRC32 (1 << 4) +#define HWCAP2_SB (1 << 5) #endif /* _UAPI__ASMARM_HWCAP_H */ |