Guillaume Chatelet | dfdac6a | 2019-01-17 18:00:21 +0100 | [diff] [blame] | 1 | #include "cpu-features.h" |
| 2 | #include "cpu_features_macros.h" |
| 3 | #include "internal/filesystem.h" |
| 4 | #include "internal/stack_line_reader.h" |
| 5 | #include "internal/string_view.h" |
| 6 | |
| 7 | #include <pthread.h> |
| 8 | |
| 9 | #if defined(CPU_FEATURES_ARCH_ARM) |
| 10 | #include "cpuinfo_arm.h" |
| 11 | #elif defined(CPU_FEATURES_ARCH_X86) |
| 12 | #include "cpuinfo_x86.h" |
| 13 | #elif defined(CPU_FEATURES_ARCH_MIPS) |
| 14 | #include "cpuinfo_mips.h" |
| 15 | #elif defined(CPU_FEATURES_ARCH_AARCH64) |
| 16 | #include "cpuinfo_aarch64.h" |
| 17 | #endif |
| 18 | |
| 19 | static pthread_once_t g_once; |
| 20 | static int g_inited; |
| 21 | static uint64_t g_cpuFeatures; |
| 22 | static int g_cpuCount; |
| 23 | |
| 24 | #ifdef CPU_FEATURES_ARCH_ARM |
| 25 | static uint32_t g_cpuIdArm; |
| 26 | #endif |
| 27 | |
| 28 | static void set_cpu_mask_bit(uint32_t index, uint32_t* cpu_mask) { |
| 29 | *cpu_mask |= 1UL << index; |
| 30 | } |
| 31 | |
| 32 | // Examples of valid inputs: "31", "4-31" |
| 33 | static void parse_cpu_mask(const StringView text, uint32_t* cpu_mask) { |
| 34 | int separator_index = CpuFeatures_StringView_IndexOfChar(text, '-'); |
| 35 | if (separator_index < 0) { // A single cpu index |
| 36 | int cpu_index = CpuFeatures_StringView_ParsePositiveNumber(text); |
| 37 | if (cpu_index < 0) return; |
| 38 | set_cpu_mask_bit(cpu_index, cpu_mask); |
| 39 | } else { |
| 40 | int cpu_index_a = CpuFeatures_StringView_ParsePositiveNumber( |
| 41 | CpuFeatures_StringView_KeepFront(text, separator_index)); |
| 42 | int cpu_index_b = CpuFeatures_StringView_ParsePositiveNumber( |
| 43 | CpuFeatures_StringView_PopFront(text, separator_index + 1)); |
| 44 | int i; |
| 45 | if (cpu_index_a < 0 || cpu_index_b < 0) return; |
| 46 | for (i = cpu_index_a; i <= cpu_index_b; ++i) { |
| 47 | if (i < 32) { |
| 48 | set_cpu_mask_bit(i, cpu_mask); |
| 49 | } |
| 50 | } |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | // Format specification from |
| 55 | // https://www.kernel.org/doc/Documentation/cputopology.txt |
| 56 | // Examples of valid inputs: "31", "2,4-31,32-63", "0-1,3" |
| 57 | static void parse_cpu_mask_line(const LineResult result, uint32_t* cpu_mask) { |
| 58 | if (!result.full_line || result.eof) return; |
| 59 | StringView line = result.line; |
| 60 | for (; line.size > 0;) { |
| 61 | int next_entry_index = CpuFeatures_StringView_IndexOfChar(line, ','); |
| 62 | if (next_entry_index < 0) { |
| 63 | parse_cpu_mask(line, cpu_mask); |
| 64 | break; |
| 65 | } |
| 66 | StringView entry = CpuFeatures_StringView_KeepFront(line, next_entry_index); |
| 67 | parse_cpu_mask(entry, cpu_mask); |
| 68 | line = CpuFeatures_StringView_PopFront(line, next_entry_index + 1); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | static void update_cpu_mask_from_file(const char* filename, |
| 73 | uint32_t* cpu_mask) { |
| 74 | const int fd = CpuFeatures_OpenFile(filename); |
| 75 | if (fd >= 0) { |
| 76 | StackLineReader reader; |
| 77 | StackLineReader_Initialize(&reader, fd); |
| 78 | parse_cpu_mask_line(StackLineReader_NextLine(&reader), cpu_mask); |
| 79 | CpuFeatures_CloseFile(fd); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | static int get_cpu_count(void) { |
| 84 | uint32_t cpu_mask = 0; |
| 85 | update_cpu_mask_from_file("/sys/devices/system/cpu/present", &cpu_mask); |
| 86 | update_cpu_mask_from_file("/sys/devices/system/cpu/possible", &cpu_mask); |
| 87 | return __builtin_popcount(cpu_mask); |
| 88 | } |
| 89 | |
| 90 | static void android_cpuInit(void) { |
| 91 | g_cpuFeatures = 0; |
| 92 | g_cpuCount = 1; |
| 93 | g_inited = 1; |
| 94 | |
| 95 | g_cpuCount = get_cpu_count(); |
| 96 | if (g_cpuCount == 0) { |
| 97 | g_cpuCount = 1; |
| 98 | } |
| 99 | #if defined(CPU_FEATURES_ARCH_ARM) |
| 100 | ArmInfo info = GetArmInfo(); |
| 101 | if (info.architecture == 7) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_ARMv7; |
| 102 | if (info.features.vfpv3) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_VFPv3; |
Guillaume Chatelet | a528c7f | 2019-01-18 11:04:22 +0100 | [diff] [blame] | 103 | if (info.features.neon) { |
| 104 | g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_NEON; |
| 105 | g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_VFP_D32; |
| 106 | } |
Guillaume Chatelet | dfdac6a | 2019-01-17 18:00:21 +0100 | [diff] [blame] | 107 | if (info.features.vfpv3d16) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_VFP_FP16; |
| 108 | if (info.features.idiva) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_IDIV_ARM; |
| 109 | if (info.features.idivt) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_IDIV_THUMB2; |
| 110 | if (info.features.iwmmxt) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_iWMMXt; |
| 111 | if (info.features.aes) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_AES; |
| 112 | if (info.features.pmull) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_PMULL; |
| 113 | if (info.features.sha1) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_SHA1; |
| 114 | if (info.features.sha2) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_SHA2; |
| 115 | if (info.features.crc32) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_CRC32; |
Guillaume Chatelet | a528c7f | 2019-01-18 11:04:22 +0100 | [diff] [blame] | 116 | if (info.architecture >= 6) |
| 117 | g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_LDREX_STREX; |
Guillaume Chatelet | 96552a8 | 2019-11-26 11:05:19 +0100 | [diff] [blame^] | 118 | if (info.features.vfp) g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_VFPv2; |
Guillaume Chatelet | a528c7f | 2019-01-18 11:04:22 +0100 | [diff] [blame] | 119 | if (info.features.vfpv4) { |
| 120 | g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_VFP_FMA; |
| 121 | g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_NEON_FMA; |
| 122 | } |
Guillaume Chatelet | dfdac6a | 2019-01-17 18:00:21 +0100 | [diff] [blame] | 123 | g_cpuIdArm = GetArmCpuId(&info); |
| 124 | #elif defined(CPU_FEATURES_ARCH_X86) |
| 125 | X86Info info = GetX86Info(); |
| 126 | if (info.features.ssse3) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_SSSE3; |
Guillaume Chatelet | d395dfa | 2019-01-22 13:19:42 +0100 | [diff] [blame] | 127 | if (info.features.popcnt) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_POPCNT; |
| 128 | if (info.features.movbe) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_MOVBE; |
Guillaume Chatelet | dfdac6a | 2019-01-17 18:00:21 +0100 | [diff] [blame] | 129 | if (info.features.sse4_1) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_SSE4_1; |
| 130 | if (info.features.sse4_2) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_SSE4_2; |
Guillaume Chatelet | d395dfa | 2019-01-22 13:19:42 +0100 | [diff] [blame] | 131 | if (info.features.aes) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_AES_NI; |
Guillaume Chatelet | dfdac6a | 2019-01-17 18:00:21 +0100 | [diff] [blame] | 132 | if (info.features.avx) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_AVX; |
Guillaume Chatelet | d395dfa | 2019-01-22 13:19:42 +0100 | [diff] [blame] | 133 | if (info.features.rdrnd) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_RDRAND; |
Guillaume Chatelet | dfdac6a | 2019-01-17 18:00:21 +0100 | [diff] [blame] | 134 | if (info.features.avx2) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_AVX2; |
Guillaume Chatelet | d395dfa | 2019-01-22 13:19:42 +0100 | [diff] [blame] | 135 | if (info.features.sha) g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_SHA_NI; |
Guillaume Chatelet | dfdac6a | 2019-01-17 18:00:21 +0100 | [diff] [blame] | 136 | #elif defined(CPU_FEATURES_ARCH_MIPS) |
| 137 | MipsInfo info = GetMipsInfo(); |
Guillaume Chatelet | 5911e96 | 2019-01-22 11:00:48 +0100 | [diff] [blame] | 138 | if (info.features.r6) g_cpuFeatures |= ANDROID_CPU_MIPS_FEATURE_R6; |
Guillaume Chatelet | dfdac6a | 2019-01-17 18:00:21 +0100 | [diff] [blame] | 139 | if (info.features.msa) g_cpuFeatures |= ANDROID_CPU_MIPS_FEATURE_MSA; |
| 140 | #elif defined(CPU_FEATURES_ARCH_AARCH64) |
| 141 | Aarch64Info info = GetAarch64Info(); |
| 142 | if (info.features.fp) g_cpuFeatures |= ANDROID_CPU_ARM64_FEATURE_FP; |
| 143 | if (info.features.asimd) g_cpuFeatures |= ANDROID_CPU_ARM64_FEATURE_ASIMD; |
| 144 | if (info.features.aes) g_cpuFeatures |= ANDROID_CPU_ARM64_FEATURE_AES; |
| 145 | if (info.features.pmull) g_cpuFeatures |= ANDROID_CPU_ARM64_FEATURE_PMULL; |
| 146 | if (info.features.sha1) g_cpuFeatures |= ANDROID_CPU_ARM64_FEATURE_SHA1; |
| 147 | if (info.features.sha2) g_cpuFeatures |= ANDROID_CPU_ARM64_FEATURE_SHA2; |
| 148 | if (info.features.crc32) g_cpuFeatures |= ANDROID_CPU_ARM64_FEATURE_CRC32; |
| 149 | #endif |
| 150 | } |
| 151 | |
| 152 | AndroidCpuFamily android_getCpuFamily(void) { |
| 153 | #if defined(CPU_FEATURES_ARCH_ARM) |
| 154 | return ANDROID_CPU_FAMILY_ARM; |
| 155 | #elif defined(CPU_FEATURES_ARCH_X86_32) |
| 156 | return ANDROID_CPU_FAMILY_X86; |
| 157 | #elif defined(CPU_FEATURES_ARCH_MIPS64) |
| 158 | return ANDROID_CPU_FAMILY_MIPS64; |
| 159 | #elif defined(CPU_FEATURES_ARCH_MIPS32) |
| 160 | return ANDROID_CPU_FAMILY_MIPS; |
| 161 | #elif defined(CPU_FEATURES_ARCH_AARCH64) |
| 162 | return ANDROID_CPU_FAMILY_ARM64; |
| 163 | #elif defined(CPU_FEATURES_ARCH_X86_64) |
| 164 | return ANDROID_CPU_FAMILY_X86_64; |
| 165 | #else |
| 166 | return ANDROID_CPU_FAMILY_UNKNOWN; |
| 167 | #endif |
| 168 | } |
| 169 | |
| 170 | uint64_t android_getCpuFeatures(void) { |
| 171 | pthread_once(&g_once, android_cpuInit); |
| 172 | return g_cpuFeatures; |
| 173 | } |
| 174 | |
| 175 | int android_getCpuCount(void) { |
| 176 | pthread_once(&g_once, android_cpuInit); |
| 177 | return g_cpuCount; |
| 178 | } |
| 179 | |
| 180 | static void android_cpuInitDummy(void) { g_inited = 1; } |
| 181 | |
| 182 | int android_setCpu(int cpu_count, uint64_t cpu_features) { |
| 183 | /* Fail if the library was already initialized. */ |
| 184 | if (g_inited) return 0; |
| 185 | g_cpuCount = (cpu_count <= 0 ? 1 : cpu_count); |
| 186 | g_cpuFeatures = cpu_features; |
| 187 | pthread_once(&g_once, android_cpuInitDummy); |
| 188 | return 1; |
| 189 | } |
| 190 | |
| 191 | #ifdef CPU_FEATURES_ARCH_ARM |
| 192 | |
| 193 | uint32_t android_getCpuIdArm(void) { |
| 194 | pthread_once(&g_once, android_cpuInit); |
| 195 | return g_cpuIdArm; |
| 196 | } |
| 197 | |
| 198 | int android_setCpuArm(int cpu_count, uint64_t cpu_features, uint32_t cpu_id) { |
| 199 | if (!android_setCpu(cpu_count, cpu_features)) return 0; |
| 200 | g_cpuIdArm = cpu_id; |
| 201 | return 1; |
| 202 | } |
| 203 | |
| 204 | #endif // CPU_FEATURES_ARCH_ARM |