| // 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. |
| |
| #include "cpuinfo_aarch64.h" |
| |
| #include <assert.h> |
| #include <ctype.h> |
| |
| #include "internal/filesystem.h" |
| #include "internal/hwcaps.h" |
| #include "internal/stack_line_reader.h" |
| #include "internal/string_view.h" |
| |
| // Generation of feature's getters/setters functions and kGetters, kSetters, |
| // kCpuInfoFlags and kHardwareCapabilities global tables. |
| #define DEFINE_TABLE_FEATURES \ |
| FEATURE(AARCH64_FP, fp, "fp", AARCH64_HWCAP_FP, 0) \ |
| FEATURE(AARCH64_ASIMD, asimd, "asimd", AARCH64_HWCAP_ASIMD, 0) \ |
| FEATURE(AARCH64_EVTSTRM, evtstrm, "evtstrm", AARCH64_HWCAP_EVTSTRM, 0) \ |
| FEATURE(AARCH64_AES, aes, "aes", AARCH64_HWCAP_AES, 0) \ |
| FEATURE(AARCH64_PMULL, pmull, "pmull", AARCH64_HWCAP_PMULL, 0) \ |
| FEATURE(AARCH64_SHA1, sha1, "sha1", AARCH64_HWCAP_SHA1, 0) \ |
| FEATURE(AARCH64_SHA2, sha2, "sha2", AARCH64_HWCAP_SHA2, 0) \ |
| FEATURE(AARCH64_CRC32, crc32, "crc32", AARCH64_HWCAP_CRC32, 0) \ |
| FEATURE(AARCH64_ATOMICS, atomics, "atomics", AARCH64_HWCAP_ATOMICS, 0) \ |
| FEATURE(AARCH64_FPHP, fphp, "fphp", AARCH64_HWCAP_FPHP, 0) \ |
| FEATURE(AARCH64_ASIMDHP, asimdhp, "asimdhp", AARCH64_HWCAP_ASIMDHP, 0) \ |
| FEATURE(AARCH64_CPUID, cpuid, "cpuid", AARCH64_HWCAP_CPUID, 0) \ |
| FEATURE(AARCH64_ASIMDRDM, asimdrdm, "asimdrdm", AARCH64_HWCAP_ASIMDRDM, 0) \ |
| FEATURE(AARCH64_JSCVT, jscvt, "jscvt", AARCH64_HWCAP_JSCVT, 0) \ |
| FEATURE(AARCH64_FCMA, fcma, "fcma", AARCH64_HWCAP_FCMA, 0) \ |
| FEATURE(AARCH64_LRCPC, lrcpc, "lrcpc", AARCH64_HWCAP_LRCPC, 0) \ |
| FEATURE(AARCH64_DCPOP, dcpop, "dcpop", AARCH64_HWCAP_DCPOP, 0) \ |
| FEATURE(AARCH64_SHA3, sha3, "sha3", AARCH64_HWCAP_SHA3, 0) \ |
| FEATURE(AARCH64_SM3, sm3, "sm3", AARCH64_HWCAP_SM3, 0) \ |
| FEATURE(AARCH64_SM4, sm4, "sm4", AARCH64_HWCAP_SM4, 0) \ |
| FEATURE(AARCH64_ASIMDDP, asimddp, "asimddp", AARCH64_HWCAP_ASIMDDP, 0) \ |
| FEATURE(AARCH64_SHA512, sha512, "sha512", AARCH64_HWCAP_SHA512, 0) \ |
| FEATURE(AARCH64_SVE, sve, "sve", AARCH64_HWCAP_SVE, 0) \ |
| FEATURE(AARCH64_ASIMDFHM, asimdfhm, "asimdfhm", AARCH64_HWCAP_ASIMDFHM, 0) \ |
| FEATURE(AARCH64_DIT, dit, "dit", AARCH64_HWCAP_DIT, 0) \ |
| FEATURE(AARCH64_USCAT, uscat, "uscat", AARCH64_HWCAP_USCAT, 0) \ |
| FEATURE(AARCH64_ILRCPC, ilrcpc, "ilrcpc", AARCH64_HWCAP_ILRCPC, 0) \ |
| FEATURE(AARCH64_FLAGM, flagm, "flagm", AARCH64_HWCAP_FLAGM, 0) \ |
| FEATURE(AARCH64_SSBS, ssbs, "ssbs", AARCH64_HWCAP_SSBS, 0) \ |
| FEATURE(AARCH64_SB, sb, "sb", AARCH64_HWCAP_SB, 0) \ |
| FEATURE(AARCH64_PACA, paca, "paca", AARCH64_HWCAP_PACA, 0) \ |
| FEATURE(AARCH64_PACG, pacg, "pacg", AARCH64_HWCAP_PACG, 0) \ |
| FEATURE(AARCH64_DCPODP, dcpodp, "dcpodp", 0, AARCH64_HWCAP2_DCPODP) \ |
| FEATURE(AARCH64_SVE2, sve2, "sve2", 0, AARCH64_HWCAP2_SVE2) \ |
| FEATURE(AARCH64_SVEAES, sveaes, "sveaes", 0, AARCH64_HWCAP2_SVEAES) \ |
| FEATURE(AARCH64_SVEPMULL, svepmull, "svepmull", 0, AARCH64_HWCAP2_SVEPMULL) \ |
| FEATURE(AARCH64_SVEBITPERM, svebitperm, "svebitperm", 0, \ |
| AARCH64_HWCAP2_SVEBITPERM) \ |
| FEATURE(AARCH64_SVESHA3, svesha3, "svesha3", 0, AARCH64_HWCAP2_SVESHA3) \ |
| FEATURE(AARCH64_SVESM4, svesm4, "svesm4", 0, AARCH64_HWCAP2_SVESM4) \ |
| FEATURE(AARCH64_FLAGM2, flagm2, "flagm2", 0, AARCH64_HWCAP2_FLAGM2) \ |
| FEATURE(AARCH64_FRINT, frint, "frint", 0, AARCH64_HWCAP2_FRINT) \ |
| FEATURE(AARCH64_SVEI8MM, svei8mm, "svei8mm", 0, AARCH64_HWCAP2_SVEI8MM) \ |
| FEATURE(AARCH64_SVEF32MM, svef32mm, "svef32mm", 0, AARCH64_HWCAP2_SVEF32MM) \ |
| FEATURE(AARCH64_SVEF64MM, svef64mm, "svef64mm", 0, AARCH64_HWCAP2_SVEF64MM) \ |
| FEATURE(AARCH64_SVEBF16, svebf16, "svebf16", 0, AARCH64_HWCAP2_SVEBF16) \ |
| FEATURE(AARCH64_I8MM, i8mm, "i8mm", 0, AARCH64_HWCAP2_I8MM) \ |
| FEATURE(AARCH64_BF16, bf16, "bf16", 0, AARCH64_HWCAP2_BF16) \ |
| FEATURE(AARCH64_DGH, dgh, "dgh", 0, AARCH64_HWCAP2_DGH) \ |
| FEATURE(AARCH64_RNG, rng, "rng", 0, AARCH64_HWCAP2_RNG) \ |
| FEATURE(AARCH64_BTI, bti, "bti", 0, AARCH64_HWCAP2_BTI) |
| #define DEFINE_TABLE_FEATURE_TYPE Aarch64Features |
| #include "define_tables.h" |
| |
| static bool HandleAarch64Line(const LineResult result, |
| Aarch64Info* const info) { |
| StringView line = result.line; |
| StringView key, value; |
| if (CpuFeatures_StringView_GetAttributeKeyValue(line, &key, &value)) { |
| if (CpuFeatures_StringView_IsEquals(key, str("Features"))) { |
| for (size_t i = 0; i < AARCH64_LAST_; ++i) { |
| kSetters[i](&info->features, |
| CpuFeatures_StringView_HasWord(value, kCpuInfoFlags[i])); |
| } |
| } else if (CpuFeatures_StringView_IsEquals(key, str("CPU implementer"))) { |
| info->implementer = CpuFeatures_StringView_ParsePositiveNumber(value); |
| } else if (CpuFeatures_StringView_IsEquals(key, str("CPU variant"))) { |
| info->variant = CpuFeatures_StringView_ParsePositiveNumber(value); |
| } else if (CpuFeatures_StringView_IsEquals(key, str("CPU part"))) { |
| info->part = CpuFeatures_StringView_ParsePositiveNumber(value); |
| } else if (CpuFeatures_StringView_IsEquals(key, str("CPU revision"))) { |
| info->revision = CpuFeatures_StringView_ParsePositiveNumber(value); |
| } |
| } |
| return !result.eof; |
| } |
| |
| static void FillProcCpuInfoData(Aarch64Info* const info) { |
| const int fd = CpuFeatures_OpenFile("/proc/cpuinfo"); |
| if (fd >= 0) { |
| StackLineReader reader; |
| StackLineReader_Initialize(&reader, fd); |
| for (;;) { |
| if (!HandleAarch64Line(StackLineReader_NextLine(&reader), info)) { |
| break; |
| } |
| } |
| CpuFeatures_CloseFile(fd); |
| } |
| } |
| |
| static const Aarch64Info kEmptyAarch64Info; |
| |
| Aarch64Info GetAarch64Info(void) { |
| // capabilities are fetched from both getauxval and /proc/cpuinfo so we can |
| // have some information if the executable is sandboxed (aka no access to |
| // /proc/cpuinfo). |
| Aarch64Info info = kEmptyAarch64Info; |
| |
| FillProcCpuInfoData(&info); |
| const HardwareCapabilities hwcaps = CpuFeatures_GetHardwareCapabilities(); |
| for (size_t i = 0; i < AARCH64_LAST_; ++i) { |
| if (CpuFeatures_IsHwCapsSet(kHardwareCapabilities[i], hwcaps)) { |
| kSetters[i](&info.features, true); |
| } |
| } |
| |
| return info; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // Introspection functions |
| |
| int GetAarch64FeaturesEnumValue(const Aarch64Features* features, |
| Aarch64FeaturesEnum value) { |
| if (value >= AARCH64_LAST_) return false; |
| return kGetters[value](features); |
| } |
| |
| const char* GetAarch64FeaturesEnumName(Aarch64FeaturesEnum value) { |
| if (value >= AARCH64_LAST_) return "unknown feature"; |
| return kCpuInfoFlags[value]; |
| } |
