// Copyright 2017 Google LLC // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // Interface to retrieve hardware capabilities. It relies on Linux's getauxval // or `/proc/self/auxval` under the hood. #ifndef CPU_FEATURES_INCLUDE_INTERNAL_HWCAPS_H_ #define CPU_FEATURES_INCLUDE_INTERNAL_HWCAPS_H_ #include #include #include "cpu_features_macros.h" CPU_FEATURES_START_CPP_NAMESPACE // To avoid depending on the linux kernel we reproduce the architecture specific // constants here. // http://elixir.free-electrons.com/linux/latest/source/arch/arm64/include/uapi/asm/hwcap.h #define AARCH64_HWCAP_FP (1UL << 0) #define AARCH64_HWCAP_ASIMD (1UL << 1) #define AARCH64_HWCAP_EVTSTRM (1UL << 2) #define AARCH64_HWCAP_AES (1UL << 3) #define AARCH64_HWCAP_PMULL (1UL << 4) #define AARCH64_HWCAP_SHA1 (1UL << 5) #define AARCH64_HWCAP_SHA2 (1UL << 6) #define AARCH64_HWCAP_CRC32 (1UL << 7) #define AARCH64_HWCAP_ATOMICS (1UL << 8) #define AARCH64_HWCAP_FPHP (1UL << 9) #define AARCH64_HWCAP_ASIMDHP (1UL << 10) #define AARCH64_HWCAP_CPUID (1UL << 11) #define AARCH64_HWCAP_ASIMDRDM (1UL << 12) #define AARCH64_HWCAP_JSCVT (1UL << 13) #define AARCH64_HWCAP_FCMA (1UL << 14) #define AARCH64_HWCAP_LRCPC (1UL << 15) #define AARCH64_HWCAP_DCPOP (1UL << 16) #define AARCH64_HWCAP_SHA3 (1UL << 17) #define AARCH64_HWCAP_SM3 (1UL << 18) #define AARCH64_HWCAP_SM4 (1UL << 19) #define AARCH64_HWCAP_ASIMDDP (1UL << 20) #define AARCH64_HWCAP_SHA512 (1UL << 21) #define AARCH64_HWCAP_SVE (1UL << 22) #define AARCH64_HWCAP_ASIMDFHM (1UL << 23) #define AARCH64_HWCAP_DIT (1UL << 24) #define AARCH64_HWCAP_USCAT (1UL << 25) #define AARCH64_HWCAP_ILRCPC (1UL << 26) #define AARCH64_HWCAP_FLAGM (1UL << 27) #define AARCH64_HWCAP_SSBS (1UL << 28) #define AARCH64_HWCAP_SB (1UL << 29) #define AARCH64_HWCAP_PACA (1UL << 30) #define AARCH64_HWCAP_PACG (1UL << 31) #define AARCH64_HWCAP2_DCPODP (1UL << 0) #define AARCH64_HWCAP2_SVE2 (1UL << 1) #define AARCH64_HWCAP2_SVEAES (1UL << 2) #define AARCH64_HWCAP2_SVEPMULL (1UL << 3) #define AARCH64_HWCAP2_SVEBITPERM (1UL << 4) #define AARCH64_HWCAP2_SVESHA3 (1UL << 5) #define AARCH64_HWCAP2_SVESM4 (1UL << 6) #define AARCH64_HWCAP2_FLAGM2 (1UL << 7) #define AARCH64_HWCAP2_FRINT (1UL << 8) #define AARCH64_HWCAP2_SVEI8MM (1UL << 9) #define AARCH64_HWCAP2_SVEF32MM (1UL << 10) #define AARCH64_HWCAP2_SVEF64MM (1UL << 11) #define AARCH64_HWCAP2_SVEBF16 (1UL << 12) #define AARCH64_HWCAP2_I8MM (1UL << 13) #define AARCH64_HWCAP2_BF16 (1UL << 14) #define AARCH64_HWCAP2_DGH (1UL << 15) #define AARCH64_HWCAP2_RNG (1UL << 16) #define AARCH64_HWCAP2_BTI (1UL << 17) #define AARCH64_HWCAP2_MTE (1UL << 18) // http://elixir.free-electrons.com/linux/latest/source/arch/arm/include/uapi/asm/hwcap.h #define ARM_HWCAP_SWP (1UL << 0) #define ARM_HWCAP_HALF (1UL << 1) #define ARM_HWCAP_THUMB (1UL << 2) #define ARM_HWCAP_26BIT (1UL << 3) #define ARM_HWCAP_FAST_MULT (1UL << 4) #define ARM_HWCAP_FPA (1UL << 5) #define ARM_HWCAP_VFP (1UL << 6) #define ARM_HWCAP_EDSP (1UL << 7) #define ARM_HWCAP_JAVA (1UL << 8) #define ARM_HWCAP_IWMMXT (1UL << 9) #define ARM_HWCAP_CRUNCH (1UL << 10) #define ARM_HWCAP_THUMBEE (1UL << 11) #define ARM_HWCAP_NEON (1UL << 12) #define ARM_HWCAP_VFPV3 (1UL << 13) #define ARM_HWCAP_VFPV3D16 (1UL << 14) #define ARM_HWCAP_TLS (1UL << 15) #define ARM_HWCAP_VFPV4 (1UL << 16) #define ARM_HWCAP_IDIVA (1UL << 17) #define ARM_HWCAP_IDIVT (1UL << 18) #define ARM_HWCAP_VFPD32 (1UL << 19) #define ARM_HWCAP_LPAE (1UL << 20) #define ARM_HWCAP_EVTSTRM (1UL << 21) #define ARM_HWCAP2_AES (1UL << 0) #define ARM_HWCAP2_PMULL (1UL << 1) #define ARM_HWCAP2_SHA1 (1UL << 2) #define ARM_HWCAP2_SHA2 (1UL << 3) #define ARM_HWCAP2_CRC32 (1UL << 4) // http://elixir.free-electrons.com/linux/latest/source/arch/mips/include/uapi/asm/hwcap.h #define MIPS_HWCAP_R6 (1UL << 0) #define MIPS_HWCAP_MSA (1UL << 1) #define MIPS_HWCAP_CRC32 (1UL << 2) // http://elixir.free-electrons.com/linux/latest/source/arch/powerpc/include/uapi/asm/cputable.h #ifndef _UAPI__ASM_POWERPC_CPUTABLE_H /* in AT_HWCAP */ #define PPC_FEATURE_32 0x80000000 #define PPC_FEATURE_64 0x40000000 #define PPC_FEATURE_601_INSTR 0x20000000 #define PPC_FEATURE_HAS_ALTIVEC 0x10000000 #define PPC_FEATURE_HAS_FPU 0x08000000 #define PPC_FEATURE_HAS_MMU 0x04000000 #define PPC_FEATURE_HAS_4xxMAC 0x02000000 #define PPC_FEATURE_UNIFIED_CACHE 0x01000000 #define PPC_FEATURE_HAS_SPE 0x00800000 #define PPC_FEATURE_HAS_EFP_SINGLE 0x00400000 #define PPC_FEATURE_HAS_EFP_DOUBLE 0x00200000 #define PPC_FEATURE_NO_TB 0x00100000 #define PPC_FEATURE_POWER4 0x00080000 #define PPC_FEATURE_POWER5 0x00040000 #define PPC_FEATURE_POWER5_PLUS 0x00020000 #define PPC_FEATURE_CELL 0x00010000 #define PPC_FEATURE_BOOKE 0x00008000 #define PPC_FEATURE_SMT 0x00004000 #define PPC_FEATURE_ICACHE_SNOOP 0x00002000 #define PPC_FEATURE_ARCH_2_05 0x00001000 #define PPC_FEATURE_PA6T 0x00000800 #define PPC_FEATURE_HAS_DFP 0x00000400 #define PPC_FEATURE_POWER6_EXT 0x00000200 #define PPC_FEATURE_ARCH_2_06 0x00000100 #define PPC_FEATURE_HAS_VSX 0x00000080 #define PPC_FEATURE_PSERIES_PERFMON_COMPAT 0x00000040 /* Reserved - do not use 0x00000004 */ #define PPC_FEATURE_TRUE_LE 0x00000002 #define PPC_FEATURE_PPC_LE 0x00000001 /* in AT_HWCAP2 */ #define PPC_FEATURE2_ARCH_2_07 0x80000000 #define PPC_FEATURE2_HTM 0x40000000 #define PPC_FEATURE2_DSCR 0x20000000 #define PPC_FEATURE2_EBB 0x10000000 #define PPC_FEATURE2_ISEL 0x08000000 #define PPC_FEATURE2_TAR 0x04000000 #define PPC_FEATURE2_VEC_CRYPTO 0x02000000 #define PPC_FEATURE2_HTM_NOSC 0x01000000 #define PPC_FEATURE2_ARCH_3_00 0x00800000 #define PPC_FEATURE2_HAS_IEEE128 0x00400000 #define PPC_FEATURE2_DARN 0x00200000 #define PPC_FEATURE2_SCV 0x00100000 #define PPC_FEATURE2_HTM_NO_SUSPEND 0x00080000 #endif typedef struct { unsigned long hwcaps; unsigned long hwcaps2; } HardwareCapabilities; // Retrieves values from auxiliary vector for types AT_HWCAP and AT_HWCAP2. // First tries to call getauxval(), if not available falls back to reading // "/proc/self/auxv". HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void); // Checks whether value for AT_HWCAP (or AT_HWCAP2) match hwcaps_mask. bool CpuFeatures_IsHwCapsSet(const HardwareCapabilities hwcaps_mask, const HardwareCapabilities hwcaps); // Get pointer for the AT_PLATFORM type. const char* CpuFeatures_GetPlatformPointer(void); // Get pointer for the AT_BASE_PLATFORM type. const char* CpuFeatures_GetBasePlatformPointer(void); CPU_FEATURES_END_CPP_NAMESPACE #endif // CPU_FEATURES_INCLUDE_INTERNAL_HWCAPS_H_