sysdeps/x86/dl-diagnostics-cpu.c

   1 /* Print CPU diagnostics data in ld.so.  x86 version.
   2    Copyright (C) 2021-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 <dl-diagnostics.h>
  20 #include <ldsodefs.h>
  21
  22 static void
  23 print_cpu_features_value (const char *label, uint64_t value)
  24 {
  25   _dl_printf ("x86.cpu_features.");
  26   _dl_diagnostics_print_labeled_value (label, value);
  27 }
  28
  29 static void
  30 print_cpu_feature_internal (unsigned int index, const char *kind,
  31                             unsigned int reg, uint32_t value)
  32 {
  33   _dl_printf ("x86.cpu_features.features[0x%x].%s[0x%x]=0x%x\n",
  34               index, kind, reg, value);
  35 }
  36
  37 static void
  38 print_cpu_feature_preferred (const char *label, unsigned int flag)
  39 {
  40   _dl_printf("x86.cpu_features.preferred.%s=0x%x\n", label, flag);
  41 }
  42
  43 void
  44 _dl_diagnostics_cpu (void)
  45 {
  46   const struct cpu_features *cpu_features = __get_cpu_features ();
  47
  48   print_cpu_features_value ("basic.kind", cpu_features->basic.kind);
  49   print_cpu_features_value ("basic.max_cpuid", cpu_features->basic.max_cpuid);
  50   print_cpu_features_value ("basic.family", cpu_features->basic.family);
  51   print_cpu_features_value ("basic.model", cpu_features->basic.model);
  52   print_cpu_features_value ("basic.stepping", cpu_features->basic.stepping);
  53
  54   for (unsigned int index = 0; index < CPUID_INDEX_MAX; ++index)
  55     {
  56       /* The index values are part of the ABI via
  57          <sys/platform/x86.h>, so translating them to strings is not
  58          necessary.  */
  59       for (unsigned int reg = 0; reg < 4; ++reg)
  60         print_cpu_feature_internal
  61           (index, "cpuid", reg,
  62            cpu_features->features[index].cpuid_array[reg]);
  63       for (unsigned int reg = 0; reg < 4; ++reg)
  64         print_cpu_feature_internal
  65           (index, "active", reg,
  66            cpu_features->features[index].active_array[reg]);
  67     }
  68
  69   /* The preferred indicators are not part of the ABI and need to be
  70      translated.  */
  71 #define BIT(x) \
  72   print_cpu_feature_preferred (#x, CPU_FEATURE_PREFERRED_P (cpu_features, x));
  73 #include "cpu-features-preferred_feature_index_1.def"
  74 #undef BIT
  75
  76   print_cpu_features_value ("isa_1", cpu_features->isa_1);
  77   print_cpu_features_value ("xsave_state_size",
  78                             cpu_features->xsave_state_size);
  79   print_cpu_features_value ("xsave_state_full_size",
  80                             cpu_features->xsave_state_full_size);
  81   print_cpu_features_value ("data_cache_size", cpu_features->data_cache_size);
  82   print_cpu_features_value ("shared_cache_size",
  83                             cpu_features->shared_cache_size);
  84   print_cpu_features_value ("non_temporal_threshold",
  85                             cpu_features->non_temporal_threshold);
  86   print_cpu_features_value ("rep_movsb_threshold",
  87                             cpu_features->rep_movsb_threshold);
  88   print_cpu_features_value ("rep_movsb_stop_threshold",
  89                             cpu_features->rep_movsb_stop_threshold);
  90   print_cpu_features_value ("rep_stosb_threshold",
  91                             cpu_features->rep_stosb_threshold);
  92   print_cpu_features_value ("level1_icache_size",
  93                             cpu_features->level1_icache_size);
  94   print_cpu_features_value ("level1_icache_linesize",
  95                             cpu_features->level1_icache_linesize);
  96   print_cpu_features_value ("level1_dcache_size",
  97                             cpu_features->level1_dcache_size);
  98   print_cpu_features_value ("level1_dcache_assoc",
  99                             cpu_features->level1_dcache_assoc);
 100   print_cpu_features_value ("level1_dcache_linesize",
 101                             cpu_features->level1_dcache_linesize);
 102   print_cpu_features_value ("level2_cache_size",
 103                             cpu_features->level2_cache_size);
 104   print_cpu_features_value ("level2_cache_assoc",
 105                             cpu_features->level2_cache_assoc);
 106   print_cpu_features_value ("level2_cache_linesize",
 107                             cpu_features->level2_cache_linesize);
 108   print_cpu_features_value ("level3_cache_size",
 109                             cpu_features->level3_cache_size);
 110   print_cpu_features_value ("level3_cache_assoc",
 111                             cpu_features->level3_cache_assoc);
 112   print_cpu_features_value ("level3_cache_linesize",
 113                             cpu_features->level3_cache_linesize);
 114   print_cpu_features_value ("level4_cache_size",
 115                             cpu_features->level4_cache_size);
 116   print_cpu_features_value ("cachesize_non_temporal_divisor",
 117                             cpu_features->cachesize_non_temporal_divisor);
 118   _Static_assert (
 119       offsetof (struct cpu_features, cachesize_non_temporal_divisor)
 120               + sizeof (cpu_features->cachesize_non_temporal_divisor)
 121           == sizeof (*cpu_features),
 122       "last cpu_features field has been printed");
 123 }