sysdeps/x86/tst-cpu-features-cpuinfo.c

   1 /* Test CPU feature data against /proc/cpuinfo.
   2    This file is part of the GNU C Library.
   3    Copyright (C) 2012-2022 Free Software Foundation, Inc.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <cpu-features.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <stdbool.h>
  24
  25 static char *cpu_flags;
  26
  27 /* Search for flags in /proc/cpuinfo and store line
  28    in cpu_flags.  */
  29 void
  30 get_cpuinfo (void)
  31 {
  32   FILE *f;
  33   char *line = NULL;
  34   size_t len = 0;
  35   ssize_t read;
  36
  37   f = fopen ("/proc/cpuinfo", "r");
  38   if (f == NULL)
  39     {
  40       printf ("cannot open /proc/cpuinfo\n");
  41       exit (1);
  42     }
  43
  44   while ((read = getline (&line, &len, f)) != -1)
  45     {
  46       if (strncmp (line, "flags", 5) == 0)
  47        {
  48          cpu_flags = strdup (line);
  49          break;
  50        }
  51     }
  52   fclose (f);
  53   free (line);
  54 }
  55
  56 int
  57 check_proc (const char *proc_name, const char *search_name, int flag,
  58             int active, const char *name)
  59 {
  60   int found = 0;
  61
  62   printf ("Checking %s:\n", name);
  63   printf ("  %s: %d\n", name, flag);
  64   char *str = strstr (cpu_flags, search_name);
  65   if (str == NULL)
  66     {
  67       /* If searching for " XXX " failed, try " XXX\n".  */
  68       size_t len = strlen (search_name);
  69       char buffer[80];
  70       if (len >= sizeof buffer)
  71         abort ();
  72       memcpy (buffer, search_name, len + 1);
  73       buffer[len - 1] = '\n';
  74       str = strstr (cpu_flags, buffer);
  75     }
  76   if (str != NULL)
  77     found = 1;
  78   printf ("  cpuinfo (%s): %d\n", proc_name, found);
  79
  80   if (found != flag)
  81     {
  82       if (found || active)
  83         printf (" *** failure ***\n");
  84       else
  85         {
  86           printf (" *** missing in /proc/cpuinfo ***\n");
  87           return 0;
  88         }
  89     }
  90
  91   return (found != flag);
  92 }
  93
  94 #define CHECK_PROC(str, name) \
  95   check_proc (#str, " "#str" ", HAS_CPU_FEATURE (name), \
  96               CPU_FEATURE_USABLE (name), \
  97               "HAS_CPU_FEATURE (" #name ")")
  98
  99 static int
 100 do_test (int argc, char **argv)
 101 {
 102   int fails = 0;
 103   const struct cpu_features *cpu_features = __get_cpu_features ();
 104
 105   get_cpuinfo ();
 106   fails += CHECK_PROC (acpi, ACPI);
 107   fails += CHECK_PROC (adx, ADX);
 108   fails += CHECK_PROC (apic, APIC);
 109   fails += CHECK_PROC (aes, AES);
 110   fails += CHECK_PROC (amx_bf16, AMX_BF16);
 111   fails += CHECK_PROC (amx_int8, AMX_INT8);
 112   fails += CHECK_PROC (amx_tile, AMX_TILE);
 113   fails += CHECK_PROC (arch_capabilities, ARCH_CAPABILITIES);
 114   fails += CHECK_PROC (avx, AVX);
 115   fails += CHECK_PROC (avx2, AVX2);
 116   fails += CHECK_PROC (avx512_4fmaps, AVX512_4FMAPS);
 117   fails += CHECK_PROC (avx512_4vnniw, AVX512_4VNNIW);
 118   fails += CHECK_PROC (avx512_bf16, AVX512_BF16);
 119   fails += CHECK_PROC (avx512_bitalg, AVX512_BITALG);
 120   fails += CHECK_PROC (avx512ifma, AVX512_IFMA);
 121   fails += CHECK_PROC (avx512vbmi, AVX512_VBMI);
 122   fails += CHECK_PROC (avx512_vbmi2, AVX512_VBMI2);
 123   fails += CHECK_PROC (avx512_vnni, AVX512_VNNI);
 124   fails += CHECK_PROC (avx512_vp2intersect, AVX512_VP2INTERSECT);
 125   fails += CHECK_PROC (avx512_vpopcntdq, AVX512_VPOPCNTDQ);
 126   fails += CHECK_PROC (avx512bw, AVX512BW);
 127   fails += CHECK_PROC (avx512cd, AVX512CD);
 128   fails += CHECK_PROC (avx512er, AVX512ER);
 129   fails += CHECK_PROC (avx512dq, AVX512DQ);
 130   fails += CHECK_PROC (avx512f, AVX512F);
 131   fails += CHECK_PROC (avx512pf, AVX512PF);
 132   fails += CHECK_PROC (avx512vl, AVX512VL);
 133   fails += CHECK_PROC (bmi1, BMI1);
 134   fails += CHECK_PROC (bmi2, BMI2);
 135   fails += CHECK_PROC (cldemote, CLDEMOTE);
 136   fails += CHECK_PROC (clflushopt, CLFLUSHOPT);
 137   fails += CHECK_PROC (clflush, CLFSH);
 138   fails += CHECK_PROC (clwb, CLWB);
 139   fails += CHECK_PROC (cmov, CMOV);
 140   fails += CHECK_PROC (cx16, CMPXCHG16B);
 141   fails += CHECK_PROC (cnxt_id, CNXT_ID);
 142   fails += CHECK_PROC (core_capabilities, CORE_CAPABILITIES);
 143   fails += CHECK_PROC (cx8, CX8);
 144   fails += CHECK_PROC (dca, DCA);
 145   fails += CHECK_PROC (de, DE);
 146   fails += CHECK_PROC (zero_fcs_fds, DEPR_FPU_CS_DS);
 147   fails += CHECK_PROC (dts, DS);
 148   fails += CHECK_PROC (ds_cpl, DS_CPL);
 149   fails += CHECK_PROC (dtes64, DTES64);
 150   fails += CHECK_PROC (est, EIST);
 151   fails += CHECK_PROC (enqcmd, ENQCMD);
 152   fails += CHECK_PROC (erms, ERMS);
 153   fails += CHECK_PROC (f16c, F16C);
 154   fails += CHECK_PROC (fma, FMA);
 155   fails += CHECK_PROC (fma4, FMA4);
 156   fails += CHECK_PROC (fpu, FPU);
 157   fails += CHECK_PROC (fsgsbase, FSGSBASE);
 158   fails += CHECK_PROC (fsrm, FSRM);
 159   fails += CHECK_PROC (fxsr, FXSR);
 160   fails += CHECK_PROC (gfni, GFNI);
 161   fails += CHECK_PROC (hle, HLE);
 162   fails += CHECK_PROC (ht, HTT);
 163   fails += CHECK_PROC (hybrid, HYBRID);
 164   if (cpu_features->basic.kind == arch_kind_intel)
 165     {
 166       fails += CHECK_PROC (ibrs, IBRS_IBPB);
 167       fails += CHECK_PROC (stibp, STIBP);
 168     }
 169   else if (cpu_features->basic.kind == arch_kind_amd)
 170     {
 171       fails += CHECK_PROC (ibpb, AMD_IBPB);
 172
 173       /* The IBRS feature on AMD processors is reported using the Intel feature
 174        * on KVM guests (synthetic bit).  In both cases the cpuinfo entry is the
 175        * same.  */
 176       if (HAS_CPU_FEATURE (IBRS_IBPB))
 177         fails += CHECK_PROC (ibrs, IBRS_IBPB);
 178       else
 179         fails += CHECK_PROC (ibrs, AMD_IBRS);
 180       fails += CHECK_PROC (stibp, AMD_STIBP);
 181     }
 182   fails += CHECK_PROC (ibt, IBT);
 183   fails += CHECK_PROC (invariant_tsc, INVARIANT_TSC);
 184   fails += CHECK_PROC (invpcid, INVPCID);
 185   fails += CHECK_PROC (flush_l1d, L1D_FLUSH);
 186   fails += CHECK_PROC (lahf_lm, LAHF64_SAHF64);
 187   fails += CHECK_PROC (lm, LM);
 188   fails += CHECK_PROC (lwp, LWP);
 189   fails += CHECK_PROC (abm, LZCNT);
 190   fails += CHECK_PROC (mca, MCA);
 191   fails += CHECK_PROC (mce, MCE);
 192   fails += CHECK_PROC (md_clear, MD_CLEAR);
 193   fails += CHECK_PROC (mmx, MMX);
 194   fails += CHECK_PROC (monitor, MONITOR);
 195   fails += CHECK_PROC (movbe, MOVBE);
 196   fails += CHECK_PROC (movdiri, MOVDIRI);
 197   fails += CHECK_PROC (movdir64b, MOVDIR64B);
 198   fails += CHECK_PROC (mpx, MPX);
 199   fails += CHECK_PROC (msr, MSR);
 200   fails += CHECK_PROC (mtrr, MTRR);
 201   fails += CHECK_PROC (nx, NX);
 202   fails += CHECK_PROC (ospke, OSPKE);
 203 #if 0
 204   /* NB: /proc/cpuinfo doesn't report this feature.  */
 205   fails += CHECK_PROC (osxsave, OSXSAVE);
 206 #endif
 207   fails += CHECK_PROC (pae, PAE);
 208   fails += CHECK_PROC (pdpe1gb, PAGE1GB);
 209   fails += CHECK_PROC (pat, PAT);
 210   fails += CHECK_PROC (pbe, PBE);
 211   fails += CHECK_PROC (pcid, PCID);
 212   fails += CHECK_PROC (pclmulqdq, PCLMULQDQ);
 213   fails += CHECK_PROC (pconfig, PCONFIG);
 214   fails += CHECK_PROC (pdcm, PDCM);
 215   fails += CHECK_PROC (pge, PGE);
 216   fails += CHECK_PROC (pks, PKS);
 217   fails += CHECK_PROC (pku, PKU);
 218   fails += CHECK_PROC (popcnt, POPCNT);
 219   fails += CHECK_PROC (3dnowprefetch, PREFETCHW);
 220   fails += CHECK_PROC (prefetchwt1, PREFETCHWT1);
 221 #if 0
 222   /* NB: /proc/cpuinfo doesn't report this feature.  */
 223   fails += CHECK_PROC (ptwrite, PTWRITE);
 224 #endif
 225   fails += CHECK_PROC (pse, PSE);
 226   fails += CHECK_PROC (pse36, PSE_36);
 227   fails += CHECK_PROC (psn, PSN);
 228   fails += CHECK_PROC (rdpid, RDPID);
 229   fails += CHECK_PROC (rdrand, RDRAND);
 230   fails += CHECK_PROC (rdseed, RDSEED);
 231   fails += CHECK_PROC (rdt_a, RDT_A);
 232   fails += CHECK_PROC (cqm, RDT_M);
 233   fails += CHECK_PROC (rdtscp, RDTSCP);
 234   fails += CHECK_PROC (rtm, RTM);
 235   fails += CHECK_PROC (sdbg, SDBG);
 236   fails += CHECK_PROC (sep, SEP);
 237   fails += CHECK_PROC (serialize, SERIALIZE);
 238   fails += CHECK_PROC (sgx, SGX);
 239   fails += CHECK_PROC (sgx_lc, SGX_LC);
 240   fails += CHECK_PROC (sha_ni, SHA);
 241   fails += CHECK_PROC (shstk, SHSTK);
 242   fails += CHECK_PROC (smap, SMAP);
 243   fails += CHECK_PROC (smep, SMEP);
 244   fails += CHECK_PROC (smx, SMX);
 245   fails += CHECK_PROC (ss, SS);
 246   if (cpu_features->basic.kind == arch_kind_intel)
 247     fails += CHECK_PROC (ssbd, SSBD);
 248   else if (cpu_features->basic.kind == arch_kind_amd)
 249     {
 250       /* This feature is implemented in 2 different ways on AMD processors:
 251          newer systems provides AMD_SSBD (function 8000_0008, EBX[24]),
 252          while older system proviseds AMD_VIRT_SSBD (function 8000_008,
 253          EBX[25]).  However for AMD_VIRT_SSBD, kernel shows both 'ssbd'
 254          and 'virt_ssbd' on /proc/cpuinfo; while for AMD_SSBD only 'ssbd'
 255          is provided.  */
 256       if (HAS_CPU_FEATURE (AMD_SSBD))
 257         fails += CHECK_PROC (ssbd, AMD_SSBD);
 258       else if (HAS_CPU_FEATURE (AMD_VIRT_SSBD))
 259         fails += CHECK_PROC (virt_ssbd, AMD_VIRT_SSBD);
 260     }
 261   fails += CHECK_PROC (sse, SSE);
 262   fails += CHECK_PROC (sse2, SSE2);
 263   fails += CHECK_PROC (pni, SSE3);
 264   fails += CHECK_PROC (sse4_1, SSE4_1);
 265   fails += CHECK_PROC (sse4_2, SSE4_2);
 266   fails += CHECK_PROC (sse4a, SSE4A);
 267   fails += CHECK_PROC (ssse3, SSSE3);
 268   fails += CHECK_PROC (svm, SVM);
 269 #ifdef __x86_64__
 270   /* NB: SYSCALL_SYSRET is 64-bit only.  */
 271   fails += CHECK_PROC (syscall, SYSCALL_SYSRET);
 272 #endif
 273   fails += CHECK_PROC (tbm, TBM);
 274   fails += CHECK_PROC (tm, TM);
 275   fails += CHECK_PROC (tm2, TM2);
 276   fails += CHECK_PROC (intel_pt, TRACE);
 277   fails += CHECK_PROC (tsc, TSC);
 278   fails += CHECK_PROC (tsc_adjust, TSC_ADJUST);
 279   fails += CHECK_PROC (tsc_deadline_timer, TSC_DEADLINE);
 280   fails += CHECK_PROC (tsxldtrk, TSXLDTRK);
 281   fails += CHECK_PROC (umip, UMIP);
 282   fails += CHECK_PROC (vaes, VAES);
 283   fails += CHECK_PROC (vme, VME);
 284   fails += CHECK_PROC (vmx, VMX);
 285   fails += CHECK_PROC (vpclmulqdq, VPCLMULQDQ);
 286   fails += CHECK_PROC (waitpkg, WAITPKG);
 287   fails += CHECK_PROC (wbnoinvd, WBNOINVD);
 288   fails += CHECK_PROC (x2apic, X2APIC);
 289   fails += CHECK_PROC (xfd, XFD);
 290   fails += CHECK_PROC (xgetbv1, XGETBV_ECX_1);
 291   fails += CHECK_PROC (xop, XOP);
 292   fails += CHECK_PROC (xsave, XSAVE);
 293   fails += CHECK_PROC (xsavec, XSAVEC);
 294   fails += CHECK_PROC (xsaveopt, XSAVEOPT);
 295   fails += CHECK_PROC (xsaves, XSAVES);
 296   fails += CHECK_PROC (xtpr, XTPRUPDCTRL);
 297
 298   printf ("%d differences between /proc/cpuinfo and glibc code.\n", fails);
 299
 300   return (fails != 0);
 301 }
 302
 303 #include "../../../test-skeleton.c"