1 /* Print CPU diagnostics data in ld.so.  x86 version.
2    Copyright (C) 2021 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
print_cpu_features_value(const char * label,uint64_t value)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
print_cpu_feature_internal(unsigned int index,const char * kind,unsigned int reg,uint32_t value)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
print_cpu_feature_preferred(const char * label,unsigned int flag)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
_dl_diagnostics_cpu(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   _Static_assert (offsetof (struct cpu_features, level4_cache_size)
117                   + sizeof (cpu_features->level4_cache_size)
118                   == sizeof (*cpu_features),
119                   "last cpu_features field has been printed");
120 }
121