1 /*===---- cpuid.h - X86 cpu model detection --------------------------------=== 2 * 3 * Permission is hereby granted, free of charge, to any person obtaining a copy 4 * of this software and associated documentation files (the "Software"), to deal 5 * in the Software without restriction, including without limitation the rights 6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 * copies of the Software, and to permit persons to whom the Software is 8 * furnished to do so, subject to the following conditions: 9 * 10 * The above copyright notice and this permission notice shall be included in 11 * all copies or substantial portions of the Software. 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 * THE SOFTWARE. 20 * 21 *===-----------------------------------------------------------------------=== 22 */ 23 24 #if !(__x86_64__ || __i386__) 25 #error this header is for x86 only 26 #endif 27 28 /* Responses identification request with %eax 0 */ 29 /* AMD: "AuthenticAMD" */ 30 #define signature_AMD_ebx 0x68747541 31 #define signature_AMD_edx 0x69746e65 32 #define signature_AMD_ecx 0x444d4163 33 /* CENTAUR: "CentaurHauls" */ 34 #define signature_CENTAUR_ebx 0x746e6543 35 #define signature_CENTAUR_edx 0x48727561 36 #define signature_CENTAUR_ecx 0x736c7561 37 /* CYRIX: "CyrixInstead" */ 38 #define signature_CYRIX_ebx 0x69727943 39 #define signature_CYRIX_edx 0x736e4978 40 #define signature_CYRIX_ecx 0x64616574 41 /* INTEL: "GenuineIntel" */ 42 #define signature_INTEL_ebx 0x756e6547 43 #define signature_INTEL_edx 0x49656e69 44 #define signature_INTEL_ecx 0x6c65746e 45 /* TM1: "TransmetaCPU" */ 46 #define signature_TM1_ebx 0x6e617254 47 #define signature_TM1_edx 0x74656d73 48 #define signature_TM1_ecx 0x55504361 49 /* TM2: "GenuineTMx86" */ 50 #define signature_TM2_ebx 0x756e6547 51 #define signature_TM2_edx 0x54656e69 52 #define signature_TM2_ecx 0x3638784d 53 /* NSC: "Geode by NSC" */ 54 #define signature_NSC_ebx 0x646f6547 55 #define signature_NSC_edx 0x43534e20 56 #define signature_NSC_ecx 0x79622065 57 /* NEXGEN: "NexGenDriven" */ 58 #define signature_NEXGEN_ebx 0x4778654e 59 #define signature_NEXGEN_edx 0x72446e65 60 #define signature_NEXGEN_ecx 0x6e657669 61 /* RISE: "RiseRiseRise" */ 62 #define signature_RISE_ebx 0x65736952 63 #define signature_RISE_edx 0x65736952 64 #define signature_RISE_ecx 0x65736952 65 /* SIS: "SiS SiS SiS " */ 66 #define signature_SIS_ebx 0x20536953 67 #define signature_SIS_edx 0x20536953 68 #define signature_SIS_ecx 0x20536953 69 /* UMC: "UMC UMC UMC " */ 70 #define signature_UMC_ebx 0x20434d55 71 #define signature_UMC_edx 0x20434d55 72 #define signature_UMC_ecx 0x20434d55 73 /* VIA: "VIA VIA VIA " */ 74 #define signature_VIA_ebx 0x20414956 75 #define signature_VIA_edx 0x20414956 76 #define signature_VIA_ecx 0x20414956 77 /* VORTEX: "Vortex86 SoC" */ 78 #define signature_VORTEX_ebx 0x74726f56 79 #define signature_VORTEX_edx 0x36387865 80 #define signature_VORTEX_ecx 0x436f5320 81 82 /* Features in %ecx for leaf 1 */ 83 #define bit_SSE3 0x00000001 84 #define bit_PCLMULQDQ 0x00000002 85 #define bit_PCLMUL bit_PCLMULQDQ /* for gcc compat */ 86 #define bit_DTES64 0x00000004 87 #define bit_MONITOR 0x00000008 88 #define bit_DSCPL 0x00000010 89 #define bit_VMX 0x00000020 90 #define bit_SMX 0x00000040 91 #define bit_EIST 0x00000080 92 #define bit_TM2 0x00000100 93 #define bit_SSSE3 0x00000200 94 #define bit_CNXTID 0x00000400 95 #define bit_FMA 0x00001000 96 #define bit_CMPXCHG16B 0x00002000 97 #define bit_xTPR 0x00004000 98 #define bit_PDCM 0x00008000 99 #define bit_PCID 0x00020000 100 #define bit_DCA 0x00040000 101 #define bit_SSE41 0x00080000 102 #define bit_SSE4_1 bit_SSE41 /* for gcc compat */ 103 #define bit_SSE42 0x00100000 104 #define bit_SSE4_2 bit_SSE42 /* for gcc compat */ 105 #define bit_x2APIC 0x00200000 106 #define bit_MOVBE 0x00400000 107 #define bit_POPCNT 0x00800000 108 #define bit_TSCDeadline 0x01000000 109 #define bit_AESNI 0x02000000 110 #define bit_AES bit_AESNI /* for gcc compat */ 111 #define bit_XSAVE 0x04000000 112 #define bit_OSXSAVE 0x08000000 113 #define bit_AVX 0x10000000 114 #define bit_F16C 0x20000000 115 #define bit_RDRND 0x40000000 116 117 /* Features in %edx for leaf 1 */ 118 #define bit_FPU 0x00000001 119 #define bit_VME 0x00000002 120 #define bit_DE 0x00000004 121 #define bit_PSE 0x00000008 122 #define bit_TSC 0x00000010 123 #define bit_MSR 0x00000020 124 #define bit_PAE 0x00000040 125 #define bit_MCE 0x00000080 126 #define bit_CX8 0x00000100 127 #define bit_CMPXCHG8B bit_CX8 /* for gcc compat */ 128 #define bit_APIC 0x00000200 129 #define bit_SEP 0x00000800 130 #define bit_MTRR 0x00001000 131 #define bit_PGE 0x00002000 132 #define bit_MCA 0x00004000 133 #define bit_CMOV 0x00008000 134 #define bit_PAT 0x00010000 135 #define bit_PSE36 0x00020000 136 #define bit_PSN 0x00040000 137 #define bit_CLFSH 0x00080000 138 #define bit_DS 0x00200000 139 #define bit_ACPI 0x00400000 140 #define bit_MMX 0x00800000 141 #define bit_FXSR 0x01000000 142 #define bit_FXSAVE bit_FXSR /* for gcc compat */ 143 #define bit_SSE 0x02000000 144 #define bit_SSE2 0x04000000 145 #define bit_SS 0x08000000 146 #define bit_HTT 0x10000000 147 #define bit_TM 0x20000000 148 #define bit_PBE 0x80000000 149 150 /* Features in %ebx for leaf 7 sub-leaf 0 */ 151 #define bit_FSGSBASE 0x00000001 152 #define bit_SGX 0x00000004 153 #define bit_BMI 0x00000008 154 #define bit_HLE 0x00000010 155 #define bit_AVX2 0x00000020 156 #define bit_SMEP 0x00000080 157 #define bit_BMI2 0x00000100 158 #define bit_ENH_MOVSB 0x00000200 159 #define bit_RTM 0x00000800 160 #define bit_MPX 0x00004000 161 #define bit_AVX512F 0x00010000 162 #define bit_AVX512DQ 0x00020000 163 #define bit_RDSEED 0x00040000 164 #define bit_ADX 0x00080000 165 #define bit_AVX512IFMA 0x00200000 166 #define bit_CLFLUSHOPT 0x00800000 167 #define bit_CLWB 0x01000000 168 #define bit_AVX512PF 0x04000000 169 #define bit_AVX51SER 0x08000000 170 #define bit_AVX512CD 0x10000000 171 #define bit_SHA 0x20000000 172 #define bit_AVX512BW 0x40000000 173 #define bit_AVX512VL 0x80000000 174 175 /* Features in %ecx for leaf 7 sub-leaf 0 */ 176 #define bit_PREFTCHWT1 0x00000001 177 #define bit_AVX512VBMI 0x00000002 178 #define bit_PKU 0x00000004 179 #define bit_OSPKE 0x00000010 180 #define bit_AVX512VPOPCNTDQ 0x00004000 181 #define bit_RDPID 0x00400000 182 183 /* Features in %edx for leaf 7 sub-leaf 0 */ 184 #define bit_AVX5124VNNIW 0x00000004 185 #define bit_AVX5124FMAPS 0x00000008 186 187 /* Features in %eax for leaf 13 sub-leaf 1 */ 188 #define bit_XSAVEOPT 0x00000001 189 #define bit_XSAVEC 0x00000002 190 #define bit_XSAVES 0x00000008 191 192 /* Features in %ecx for leaf 0x80000001 */ 193 #define bit_LAHF_LM 0x00000001 194 #define bit_ABM 0x00000020 195 #define bit_SSE4a 0x00000040 196 #define bit_PRFCHW 0x00000100 197 #define bit_XOP 0x00000800 198 #define bit_LWP 0x00008000 199 #define bit_FMA4 0x00010000 200 #define bit_TBM 0x00200000 201 #define bit_MWAITX 0x20000000 202 203 /* Features in %edx for leaf 0x80000001 */ 204 #define bit_MMXEXT 0x00400000 205 #define bit_LM 0x20000000 206 #define bit_3DNOWP 0x40000000 207 #define bit_3DNOW 0x80000000 208 209 /* Features in %ebx for leaf 0x80000001 */ 210 #define bit_CLZERO 0x00000001 211 212 213 #if __i386__ 214 #define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \ 215 __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ 216 : "0"(__leaf)) 217 218 #define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \ 219 __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ 220 : "0"(__leaf), "2"(__count)) 221 #else 222 /* x86-64 uses %rbx as the base register, so preserve it. */ 223 #define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \ 224 __asm(" xchgq %%rbx,%q1\n" \ 225 " cpuid\n" \ 226 " xchgq %%rbx,%q1" \ 227 : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ 228 : "0"(__leaf)) 229 230 #define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \ 231 __asm(" xchgq %%rbx,%q1\n" \ 232 " cpuid\n" \ 233 " xchgq %%rbx,%q1" \ 234 : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ 235 : "0"(__leaf), "2"(__count)) 236 #endif 237 238 static __inline int __get_cpuid_max (unsigned int __leaf, unsigned int *__sig) 239 { 240 unsigned int __eax, __ebx, __ecx, __edx; 241 #if __i386__ 242 int __cpuid_supported; 243 244 __asm(" pushfl\n" 245 " popl %%eax\n" 246 " movl %%eax,%%ecx\n" 247 " xorl $0x00200000,%%eax\n" 248 " pushl %%eax\n" 249 " popfl\n" 250 " pushfl\n" 251 " popl %%eax\n" 252 " movl $0,%0\n" 253 " cmpl %%eax,%%ecx\n" 254 " je 1f\n" 255 " movl $1,%0\n" 256 "1:" 257 : "=r" (__cpuid_supported) : : "eax", "ecx"); 258 if (!__cpuid_supported) 259 return 0; 260 #endif 261 262 __cpuid(__leaf, __eax, __ebx, __ecx, __edx); 263 if (__sig) 264 *__sig = __ebx; 265 return __eax; 266 } 267 268 static __inline int __get_cpuid (unsigned int __leaf, unsigned int *__eax, 269 unsigned int *__ebx, unsigned int *__ecx, 270 unsigned int *__edx) 271 { 272 unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0); 273 274 if (__max_leaf == 0 || __max_leaf < __leaf) 275 return 0; 276 277 __cpuid(__leaf, *__eax, *__ebx, *__ecx, *__edx); 278 return 1; 279 } 280 281 static __inline int __get_cpuid_count (unsigned int __leaf, 282 unsigned int __subleaf, 283 unsigned int *__eax, unsigned int *__ebx, 284 unsigned int *__ecx, unsigned int *__edx) 285 { 286 unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0); 287 288 if (__max_leaf == 0 || __max_leaf < __leaf) 289 return 0; 290 291 __cpuid_count(__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx); 292 return 1; 293 } 294