1 // Copyright 2017 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 // Interface to retrieve hardware capabilities. It relies on Linux's getauxval 16 // or `/proc/self/auxval` under the hood. 17 #ifndef CPU_FEATURES_INCLUDE_INTERNAL_HWCAPS_H_ 18 #define CPU_FEATURES_INCLUDE_INTERNAL_HWCAPS_H_ 19 20 #include <stdbool.h> 21 #include <stdint.h> 22 23 #include "cpu_features_macros.h" 24 25 CPU_FEATURES_START_CPP_NAMESPACE 26 27 // To avoid depending on the linux kernel we reproduce the architecture specific 28 // constants here. 29 30 // http://elixir.free-electrons.com/linux/latest/source/arch/arm64/include/uapi/asm/hwcap.h 31 #define AARCH64_HWCAP_FP (1UL << 0) 32 #define AARCH64_HWCAP_ASIMD (1UL << 1) 33 #define AARCH64_HWCAP_EVTSTRM (1UL << 2) 34 #define AARCH64_HWCAP_AES (1UL << 3) 35 #define AARCH64_HWCAP_PMULL (1UL << 4) 36 #define AARCH64_HWCAP_SHA1 (1UL << 5) 37 #define AARCH64_HWCAP_SHA2 (1UL << 6) 38 #define AARCH64_HWCAP_CRC32 (1UL << 7) 39 #define AARCH64_HWCAP_ATOMICS (1UL << 8) 40 #define AARCH64_HWCAP_FPHP (1UL << 9) 41 #define AARCH64_HWCAP_ASIMDHP (1UL << 10) 42 #define AARCH64_HWCAP_CPUID (1UL << 11) 43 #define AARCH64_HWCAP_ASIMDRDM (1UL << 12) 44 #define AARCH64_HWCAP_JSCVT (1UL << 13) 45 #define AARCH64_HWCAP_FCMA (1UL << 14) 46 #define AARCH64_HWCAP_LRCPC (1UL << 15) 47 #define AARCH64_HWCAP_DCPOP (1UL << 16) 48 #define AARCH64_HWCAP_SHA3 (1UL << 17) 49 #define AARCH64_HWCAP_SM3 (1UL << 18) 50 #define AARCH64_HWCAP_SM4 (1UL << 19) 51 #define AARCH64_HWCAP_ASIMDDP (1UL << 20) 52 #define AARCH64_HWCAP_SHA512 (1UL << 21) 53 #define AARCH64_HWCAP_SVE (1UL << 22) 54 #define AARCH64_HWCAP_ASIMDFHM (1UL << 23) 55 #define AARCH64_HWCAP_DIT (1UL << 24) 56 #define AARCH64_HWCAP_USCAT (1UL << 25) 57 #define AARCH64_HWCAP_ILRCPC (1UL << 26) 58 #define AARCH64_HWCAP_FLAGM (1UL << 27) 59 #define AARCH64_HWCAP_SSBS (1UL << 28) 60 #define AARCH64_HWCAP_SB (1UL << 29) 61 #define AARCH64_HWCAP_PACA (1UL << 30) 62 #define AARCH64_HWCAP_PACG (1UL << 31) 63 64 #define AARCH64_HWCAP2_DCPODP (1UL << 0) 65 #define AARCH64_HWCAP2_SVE2 (1UL << 1) 66 #define AARCH64_HWCAP2_SVEAES (1UL << 2) 67 #define AARCH64_HWCAP2_SVEPMULL (1UL << 3) 68 #define AARCH64_HWCAP2_SVEBITPERM (1UL << 4) 69 #define AARCH64_HWCAP2_SVESHA3 (1UL << 5) 70 #define AARCH64_HWCAP2_SVESM4 (1UL << 6) 71 #define AARCH64_HWCAP2_FLAGM2 (1UL << 7) 72 #define AARCH64_HWCAP2_FRINT (1UL << 8) 73 #define AARCH64_HWCAP2_SVEI8MM (1UL << 9) 74 #define AARCH64_HWCAP2_SVEF32MM (1UL << 10) 75 #define AARCH64_HWCAP2_SVEF64MM (1UL << 11) 76 #define AARCH64_HWCAP2_SVEBF16 (1UL << 12) 77 #define AARCH64_HWCAP2_I8MM (1UL << 13) 78 #define AARCH64_HWCAP2_BF16 (1UL << 14) 79 #define AARCH64_HWCAP2_DGH (1UL << 15) 80 #define AARCH64_HWCAP2_RNG (1UL << 16) 81 #define AARCH64_HWCAP2_BTI (1UL << 17) 82 #define AARCH64_HWCAP2_MTE (1UL << 18) 83 #define AARCH64_HWCAP2_ECV (1UL << 19) 84 #define AARCH64_HWCAP2_AFP (1UL << 20) 85 #define AARCH64_HWCAP2_RPRES (1UL << 21) 86 87 // http://elixir.free-electrons.com/linux/latest/source/arch/arm/include/uapi/asm/hwcap.h 88 #define ARM_HWCAP_SWP (1UL << 0) 89 #define ARM_HWCAP_HALF (1UL << 1) 90 #define ARM_HWCAP_THUMB (1UL << 2) 91 #define ARM_HWCAP_26BIT (1UL << 3) 92 #define ARM_HWCAP_FAST_MULT (1UL << 4) 93 #define ARM_HWCAP_FPA (1UL << 5) 94 #define ARM_HWCAP_VFP (1UL << 6) 95 #define ARM_HWCAP_EDSP (1UL << 7) 96 #define ARM_HWCAP_JAVA (1UL << 8) 97 #define ARM_HWCAP_IWMMXT (1UL << 9) 98 #define ARM_HWCAP_CRUNCH (1UL << 10) 99 #define ARM_HWCAP_THUMBEE (1UL << 11) 100 #define ARM_HWCAP_NEON (1UL << 12) 101 #define ARM_HWCAP_VFPV3 (1UL << 13) 102 #define ARM_HWCAP_VFPV3D16 (1UL << 14) 103 #define ARM_HWCAP_TLS (1UL << 15) 104 #define ARM_HWCAP_VFPV4 (1UL << 16) 105 #define ARM_HWCAP_IDIVA (1UL << 17) 106 #define ARM_HWCAP_IDIVT (1UL << 18) 107 #define ARM_HWCAP_VFPD32 (1UL << 19) 108 #define ARM_HWCAP_LPAE (1UL << 20) 109 #define ARM_HWCAP_EVTSTRM (1UL << 21) 110 #define ARM_HWCAP2_AES (1UL << 0) 111 #define ARM_HWCAP2_PMULL (1UL << 1) 112 #define ARM_HWCAP2_SHA1 (1UL << 2) 113 #define ARM_HWCAP2_SHA2 (1UL << 3) 114 #define ARM_HWCAP2_CRC32 (1UL << 4) 115 116 // http://elixir.free-electrons.com/linux/latest/source/arch/mips/include/uapi/asm/hwcap.h 117 #define MIPS_HWCAP_R6 (1UL << 0) 118 #define MIPS_HWCAP_MSA (1UL << 1) 119 #define MIPS_HWCAP_CRC32 (1UL << 2) 120 #define MIPS_HWCAP_MIPS16 (1UL << 3) 121 #define MIPS_HWCAP_MDMX (1UL << 4) 122 #define MIPS_HWCAP_MIPS3D (1UL << 5) 123 #define MIPS_HWCAP_SMARTMIPS (1UL << 6) 124 #define MIPS_HWCAP_DSP (1UL << 7) 125 #define MIPS_HWCAP_DSP2 (1UL << 8) 126 #define MIPS_HWCAP_DSP3 (1UL << 9) 127 128 // http://elixir.free-electrons.com/linux/latest/source/arch/powerpc/include/uapi/asm/cputable.h 129 #ifndef _UAPI__ASM_POWERPC_CPUTABLE_H 130 /* in AT_HWCAP */ 131 #define PPC_FEATURE_32 0x80000000 132 #define PPC_FEATURE_64 0x40000000 133 #define PPC_FEATURE_601_INSTR 0x20000000 134 #define PPC_FEATURE_HAS_ALTIVEC 0x10000000 135 #define PPC_FEATURE_HAS_FPU 0x08000000 136 #define PPC_FEATURE_HAS_MMU 0x04000000 137 #define PPC_FEATURE_HAS_4xxMAC 0x02000000 138 #define PPC_FEATURE_UNIFIED_CACHE 0x01000000 139 #define PPC_FEATURE_HAS_SPE 0x00800000 140 #define PPC_FEATURE_HAS_EFP_SINGLE 0x00400000 141 #define PPC_FEATURE_HAS_EFP_DOUBLE 0x00200000 142 #define PPC_FEATURE_NO_TB 0x00100000 143 #define PPC_FEATURE_POWER4 0x00080000 144 #define PPC_FEATURE_POWER5 0x00040000 145 #define PPC_FEATURE_POWER5_PLUS 0x00020000 146 #define PPC_FEATURE_CELL 0x00010000 147 #define PPC_FEATURE_BOOKE 0x00008000 148 #define PPC_FEATURE_SMT 0x00004000 149 #define PPC_FEATURE_ICACHE_SNOOP 0x00002000 150 #define PPC_FEATURE_ARCH_2_05 0x00001000 151 #define PPC_FEATURE_PA6T 0x00000800 152 #define PPC_FEATURE_HAS_DFP 0x00000400 153 #define PPC_FEATURE_POWER6_EXT 0x00000200 154 #define PPC_FEATURE_ARCH_2_06 0x00000100 155 #define PPC_FEATURE_HAS_VSX 0x00000080 156 157 #define PPC_FEATURE_PSERIES_PERFMON_COMPAT 0x00000040 158 159 /* Reserved - do not use 0x00000004 */ 160 #define PPC_FEATURE_TRUE_LE 0x00000002 161 #define PPC_FEATURE_PPC_LE 0x00000001 162 163 /* in AT_HWCAP2 */ 164 #define PPC_FEATURE2_ARCH_2_07 0x80000000 165 #define PPC_FEATURE2_HTM 0x40000000 166 #define PPC_FEATURE2_DSCR 0x20000000 167 #define PPC_FEATURE2_EBB 0x10000000 168 #define PPC_FEATURE2_ISEL 0x08000000 169 #define PPC_FEATURE2_TAR 0x04000000 170 #define PPC_FEATURE2_VEC_CRYPTO 0x02000000 171 #define PPC_FEATURE2_HTM_NOSC 0x01000000 172 #define PPC_FEATURE2_ARCH_3_00 0x00800000 173 #define PPC_FEATURE2_HAS_IEEE128 0x00400000 174 #define PPC_FEATURE2_DARN 0x00200000 175 #define PPC_FEATURE2_SCV 0x00100000 176 #define PPC_FEATURE2_HTM_NO_SUSPEND 0x00080000 177 #endif 178 179 // https://elixir.bootlin.com/linux/v6.0-rc6/source/arch/s390/include/asm/elf.h 180 #define HWCAP_S390_ESAN3 1 181 #define HWCAP_S390_ZARCH 2 182 #define HWCAP_S390_STFLE 4 183 #define HWCAP_S390_MSA 8 184 #define HWCAP_S390_LDISP 16 185 #define HWCAP_S390_EIMM 32 186 #define HWCAP_S390_DFP 64 187 #define HWCAP_S390_HPAGE 128 188 #define HWCAP_S390_ETF3EH 256 189 #define HWCAP_S390_HIGH_GPRS 512 190 #define HWCAP_S390_TE 1024 191 #define HWCAP_S390_VX 2048 192 #define HWCAP_S390_VXRS HWCAP_S390_VX 193 #define HWCAP_S390_VXD 4096 194 #define HWCAP_S390_VXRS_BCD HWCAP_S390_VXD 195 #define HWCAP_S390_VXE 8192 196 #define HWCAP_S390_VXRS_EXT HWCAP_S390_VXE 197 #define HWCAP_S390_GS 16384 198 #define HWCAP_S390_VXRS_EXT2 32768 199 #define HWCAP_S390_VXRS_PDE 65536 200 #define HWCAP_S390_SORT 131072 201 #define HWCAP_S390_DFLT 262144 202 #define HWCAP_S390_VXRS_PDE2 524288 203 #define HWCAP_S390_NNPA 1048576 204 #define HWCAP_S390_PCI_MIO 2097152 205 #define HWCAP_S390_SIE 4194304 206 207 // https://elixir.bootlin.com/linux/latest/source/arch/riscv/include/uapi/asm/hwcap.h 208 #define RISCV_HWCAP_32 0x32 209 #define RISCV_HWCAP_64 0x64 210 #define RISCV_HWCAP_128 0x128 211 #define RISCV_HWCAP_M (1UL << ('M' - 'A')) 212 #define RISCV_HWCAP_A (1UL << ('A' - 'A')) 213 #define RISCV_HWCAP_F (1UL << ('F' - 'A')) 214 #define RISCV_HWCAP_D (1UL << ('D' - 'A')) 215 #define RISCV_HWCAP_Q (1UL << ('Q' - 'A')) 216 #define RISCV_HWCAP_C (1UL << ('C' - 'A')) 217 #define RISCV_HWCAP_V (1UL << ('V' - 'A')) 218 219 typedef struct { 220 unsigned long hwcaps; 221 unsigned long hwcaps2; 222 } HardwareCapabilities; 223 224 // Retrieves values from auxiliary vector for types AT_HWCAP and AT_HWCAP2. 225 // First tries to call getauxval(), if not available falls back to reading 226 // "/proc/self/auxv". 227 HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void); 228 229 // Checks whether value for AT_HWCAP (or AT_HWCAP2) match hwcaps_mask. 230 bool CpuFeatures_IsHwCapsSet(const HardwareCapabilities hwcaps_mask, 231 const HardwareCapabilities hwcaps); 232 233 // Get pointer for the AT_PLATFORM type. 234 const char* CpuFeatures_GetPlatformPointer(void); 235 // Get pointer for the AT_BASE_PLATFORM type. 236 const char* CpuFeatures_GetBasePlatformPointer(void); 237 238 CPU_FEATURES_END_CPP_NAMESPACE 239 240 #endif // CPU_FEATURES_INCLUDE_INTERNAL_HWCAPS_H_ 241