forked from rpms/glibc
132 lines
5.2 KiB
Diff
132 lines
5.2 KiB
Diff
commit 01a5746b6c8a44dc29d33e056b63485075a6a3cc
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Wed Feb 24 13:12:04 2021 +0100
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x86: Add CPU-specific diagnostics to ld.so --list-diagnostics
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Conflicts:
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sysdeps/x86/dl-diagnostics-cpu.c
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(reworked due to struct differences, different knobs
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downstream)
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diff --git a/sysdeps/x86/dl-diagnostics-cpu.c b/sysdeps/x86/dl-diagnostics-cpu.c
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new file mode 100644
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index 0000000000000000..0ba286a828b69937
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--- /dev/null
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+++ b/sysdeps/x86/dl-diagnostics-cpu.c
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@@ -0,0 +1,101 @@
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+/* 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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+
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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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+
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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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+
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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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+
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+#include <dl-diagnostics.h>
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+#include <ldsodefs.h>
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ for (unsigned int index = 0; index < COMMON_CPUID_INDEX_MAX; ++index)
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+ {
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+ /* Downstream, these constants are not part of the ABI yet, so
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+ analysis needs to take the precise glibc version into
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+ account. */
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+ print_cpu_feature_internal
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+ (index, "cpuid", 0, cpu_features->features[index].cpuid.eax);
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+ print_cpu_feature_internal
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+ (index, "cpuid", 1, cpu_features->features[index].cpuid.ebx);
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+ print_cpu_feature_internal
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+ (index, "cpuid", 2, cpu_features->features[index].cpuid.ecx);
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+ print_cpu_feature_internal
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+ (index, "cpuid", 3, cpu_features->features[index].cpuid.edx);
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+ print_cpu_feature_internal
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+ (index, "usable", 0, cpu_features->features[index].usable.eax);
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+ print_cpu_feature_internal
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+ (index, "usable", 1, cpu_features->features[index].usable.ebx);
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+ print_cpu_feature_internal
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+ (index, "usable", 2, cpu_features->features[index].usable.ecx);
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+ print_cpu_feature_internal
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+ (index, "usable", 3, cpu_features->features[index].usable.edx);
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+ }
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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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+
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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_stosb_threshold",
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+ cpu_features->rep_stosb_threshold);
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+ _Static_assert (offsetof (struct cpu_features, rep_stosb_threshold)
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+ + sizeof (cpu_features->rep_stosb_threshold)
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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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diff --git a/sysdeps/x86/include/cpu-features.h b/sysdeps/x86/include/cpu-features.h
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index f43e22f677b249a9..536643b209425198 100644
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--- a/sysdeps/x86/include/cpu-features.h
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+++ b/sysdeps/x86/include/cpu-features.h
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@@ -107,6 +107,8 @@ enum
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# define bit_XTILECFG_state (1u << 17)
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# define bit_XTILEDATA_state (1u << 18)
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+/* NB: When adding new fields, update sysdeps/x86/dl-diagnostics-cpu.c
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+ to print them. */
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struct cpu_features
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{
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struct cpu_features_basic basic;
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