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f8d8b1b1e6
This prints some information from struct cpu_features, and the midr_el1 and dczid_el0 system register contents on every CPU. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/* Print CPU diagnostics data in ld.so. AArch64 version.
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Copyright (C) 2021-2024 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 <cpu-features.h>
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#include <dl-iterate_cpu.h>
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#include <ldsodefs.h>
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#include <sys/auxv.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 ("aarch64.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_per_cpu_value (const struct dl_iterate_cpu *dic,
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const char *label, uint64_t value)
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{
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_dl_printf ("aarch64.processor[0x%x].", dic->processor_index);
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_dl_diagnostics_print_labeled_value (label, value);
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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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print_cpu_features_value ("bti", GLRO (dl_aarch64_cpu_features).bti);
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print_cpu_features_value ("midr_el1",
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GLRO (dl_aarch64_cpu_features).midr_el1);
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print_cpu_features_value ("mops", GLRO (dl_aarch64_cpu_features).mops);
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print_cpu_features_value ("mte_state",
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GLRO (dl_aarch64_cpu_features).mte_state);
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print_cpu_features_value ("prefer_sve_ifuncs",
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GLRO (dl_aarch64_cpu_features).prefer_sve_ifuncs);
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print_cpu_features_value ("sve", GLRO (dl_aarch64_cpu_features).sve);
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print_cpu_features_value ("zva_size",
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GLRO (dl_aarch64_cpu_features).zva_size);
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struct dl_iterate_cpu dic;
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_dl_iterate_cpu_init (&dic);
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while (_dl_iterate_cpu_next (&dic))
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{
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if (dic.requested_cpu >= 0)
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_dl_printf ("aarch64.processor[0x%x].requested=0x%x\n",
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dic.processor_index, dic.requested_cpu);
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if (dic.actual_cpu >= 0)
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_dl_printf ("aarch64.processor[0x%x].observed=0x%x\n",
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dic.processor_index, dic.actual_cpu);
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if (dic.actual_node >= 0)
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_dl_printf ("aarch64.processor[0x%x].observed_node=0x%x\n",
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dic.processor_index, dic.actual_node);
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if (GLRO (dl_hwcap) & HWCAP_CPUID)
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{
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uint64_t midr_el1;
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asm ("mrs %0, midr_el1" : "=r" (midr_el1));
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print_per_cpu_value (&dic, "midr_el1", midr_el1);
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}
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{
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uint64_t dczid_el0;
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asm ("mrs %0, dczid_el0" : "=r" (dczid_el0));
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print_per_cpu_value (&dic, "dczid_el0", dczid_el0);
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}
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}
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}
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