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7c124e3714
1. Install <bits/platform/x86.h> for <sys/platform/x86.h> which includes <bits/platform/x86.h>. 2. Rename HAS_CPU_FEATURE to CPU_FEATURE_PRESENT which checks if the processor has the feature. 3. Rename CPU_FEATURE_USABLE to CPU_FEATURE_ACTIVE which checks if the feature is active. There may be other preconditions, like sufficient stack space or further setup for AMX, which must be satisfied before the feature can be used. This fixes BZ #27958. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
121 lines
5.2 KiB
C
121 lines
5.2 KiB
C
/* Print CPU diagnostics data in ld.so. x86 version.
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <dl-diagnostics.h>
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#include <ldsodefs.h>
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static void
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print_cpu_features_value (const char *label, uint64_t value)
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{
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_dl_printf ("x86.cpu_features.");
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_dl_diagnostics_print_labeled_value (label, value);
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}
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static void
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print_cpu_feature_internal (unsigned int index, const char *kind,
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unsigned int reg, uint32_t value)
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{
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_dl_printf ("x86.cpu_features.features[0x%x].%s[0x%x]=0x%x\n",
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index, kind, reg, value);
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}
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static void
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print_cpu_feature_preferred (const char *label, unsigned int flag)
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{
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_dl_printf("x86.cpu_features.preferred.%s=0x%x\n", label, flag);
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}
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void
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_dl_diagnostics_cpu (void)
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{
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const struct cpu_features *cpu_features = __get_cpu_features ();
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print_cpu_features_value ("basic.kind", cpu_features->basic.kind);
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print_cpu_features_value ("basic.max_cpuid", cpu_features->basic.max_cpuid);
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print_cpu_features_value ("basic.family", cpu_features->basic.family);
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print_cpu_features_value ("basic.model", cpu_features->basic.model);
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print_cpu_features_value ("basic.stepping", cpu_features->basic.stepping);
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for (unsigned int index = 0; index < CPUID_INDEX_MAX; ++index)
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{
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/* The index values are part of the ABI via
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<sys/platform/x86.h>, so translating them to strings is not
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necessary. */
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for (unsigned int reg = 0; reg < 4; ++reg)
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print_cpu_feature_internal
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(index, "cpuid", reg,
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cpu_features->features[index].cpuid_array[reg]);
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for (unsigned int reg = 0; reg < 4; ++reg)
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print_cpu_feature_internal
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(index, "active", reg,
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cpu_features->features[index].active_array[reg]);
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}
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/* The preferred indicators are not part of the ABI and need to be
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translated. */
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#define BIT(x) \
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print_cpu_feature_preferred (#x, CPU_FEATURE_PREFERRED_P (cpu_features, x));
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#include "cpu-features-preferred_feature_index_1.def"
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#undef BIT
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print_cpu_features_value ("isa_1", cpu_features->isa_1);
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print_cpu_features_value ("xsave_state_size",
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cpu_features->xsave_state_size);
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print_cpu_features_value ("xsave_state_full_size",
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cpu_features->xsave_state_full_size);
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print_cpu_features_value ("data_cache_size", cpu_features->data_cache_size);
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print_cpu_features_value ("shared_cache_size",
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cpu_features->shared_cache_size);
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print_cpu_features_value ("non_temporal_threshold",
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cpu_features->non_temporal_threshold);
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print_cpu_features_value ("rep_movsb_threshold",
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cpu_features->rep_movsb_threshold);
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print_cpu_features_value ("rep_movsb_stop_threshold",
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cpu_features->rep_movsb_stop_threshold);
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print_cpu_features_value ("rep_stosb_threshold",
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cpu_features->rep_stosb_threshold);
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print_cpu_features_value ("level1_icache_size",
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cpu_features->level1_icache_size);
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print_cpu_features_value ("level1_icache_linesize",
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cpu_features->level1_icache_linesize);
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print_cpu_features_value ("level1_dcache_size",
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cpu_features->level1_dcache_size);
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print_cpu_features_value ("level1_dcache_assoc",
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cpu_features->level1_dcache_assoc);
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print_cpu_features_value ("level1_dcache_linesize",
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cpu_features->level1_dcache_linesize);
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print_cpu_features_value ("level2_cache_size",
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cpu_features->level2_cache_size);
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print_cpu_features_value ("level2_cache_assoc",
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cpu_features->level2_cache_assoc);
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print_cpu_features_value ("level2_cache_linesize",
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cpu_features->level2_cache_linesize);
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print_cpu_features_value ("level3_cache_size",
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cpu_features->level3_cache_size);
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print_cpu_features_value ("level3_cache_assoc",
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cpu_features->level3_cache_assoc);
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print_cpu_features_value ("level3_cache_linesize",
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cpu_features->level3_cache_linesize);
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print_cpu_features_value ("level4_cache_size",
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cpu_features->level4_cache_size);
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_Static_assert (offsetof (struct cpu_features, level4_cache_size)
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+ sizeof (cpu_features->level4_cache_size)
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== sizeof (*cpu_features),
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"last cpu_features field has been printed");
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}
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