This patch provides a couple of macros for the testing of processor features (crypto and FP/SIMD) like support of SHA1, AES instructions, support for FPU and etc. There is already a couple of places in the arch/arm64/kernel where these processor features are tested and these macros are facilitate this.
Signed-off-by: Alexander Kuleshov <[email protected]> --- arch/arm64/include/asm/cpufeature.h | 44 +++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index c104421..2919455 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -28,7 +28,50 @@ #define ARM64_NCAPS 4 +/* + * ID_AA64ISAR0_EL1 AES, bits [7:4] + */ +#define ID_AA64ISAR0_EL1_AES_MASK 4 +#define ID_AA64ISAR0_EL1_AES(feature) \ + (((feature >> ID_AA64ISAR0_EL1_AES_MASK) & 0xf) & 1UL) +#define ID_AA64ISAR0_EL1_PMULL(feature) \ + (((feature >> ID_AA64ISAR0_EL1_AES_MASK) & 0xf) & 2UL) + +/* + * ID_AA64ISAR0_EL1 SHA1, bits [11:8] + */ +#define ID_AA64ISAR0_EL1_SHA1_MASK 8 +#define ID_AA64ISAR0_EL1_SHA1(feature) \ + (((feature >> ID_AA64ISAR0_EL1_SHA1_MASK) & 0xf) & 1UL) + +/* + * ID_AA64ISAR0_EL1 SHA2, bits [15:12] + */ +#define ID_AA64ISAR0_EL1_SHA2_MASK 12 +#define ID_AA64ISAR0_EL1_SHA2(feature) \ + (((feature >> ID_AA64ISAR0_EL1_SHA2_MASK) & 0xf) & 1UL) + +/* + * ID_AA64ISAR0_EL1 CRC32, bits [19:16] + */ +#define ID_AA64ISAR0_EL1_CRC32_MASK 16 +#define ID_AA64ISAR0_EL1_CRC32(feature) \ + (((feature >> ID_AA64ISAR0_EL1_CRC32_MASK) & 0xf) & 1UL) + +/* + * ID_AA64PFR0_EL1 FP, bits [19:16] + */ +#define ID_AA64PFR0_EL1_FP_MASK 16 +#define ID_AA64PFR0_EL1_FP(ptr) \ + (ptr & (0xf << ID_AA64PFR0_EL1_FP_MASK)) + +/* + * ID_AA64PFR0_EL1 AdvSIMD, bits [23:20] + */ +#define ID_AA64PFR0_EL1_ADV_SIMD_MASK 20 +#define ID_AA64PFR0_EL1_ADV_SIMD(ptr) \ + (ptr & (0xf << ID_AA64PFR0_EL1_ADV_SIMD_MASK)) + #ifndef __ASSEMBLY__ struct arm64_cpu_capabilities { -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
