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author | Florian Weimer <fweimer@redhat.com> | 2024-04-08 16:48:55 +0200 |
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committer | Florian Weimer <fweimer@redhat.com> | 2024-04-08 16:48:55 +0200 |
commit | f8d8b1b1e6d3b8b93f224efc796b7ea083fdb83f (patch) | |
tree | 9459f4411d993c315296f508232e38d484e385f3 /sysdeps/aarch64/dl-diagnostics-cpu.c | |
parent | 7a430f40c46acfa7ce4c3bff193b278c190b2efc (diff) | |
download | glibc-f8d8b1b1e6d3b8b93f224efc796b7ea083fdb83f.tar.gz glibc-f8d8b1b1e6d3b8b93f224efc796b7ea083fdb83f.tar.xz glibc-f8d8b1b1e6d3b8b93f224efc796b7ea083fdb83f.zip |
aarch64: Enhanced CPU diagnostics for ld.so
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>
Diffstat (limited to 'sysdeps/aarch64/dl-diagnostics-cpu.c')
-rw-r--r-- | sysdeps/aarch64/dl-diagnostics-cpu.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/sysdeps/aarch64/dl-diagnostics-cpu.c b/sysdeps/aarch64/dl-diagnostics-cpu.c new file mode 100644 index 0000000000..e037e6ea8c --- /dev/null +++ b/sysdeps/aarch64/dl-diagnostics-cpu.c @@ -0,0 +1,84 @@ +/* Print CPU diagnostics data in ld.so. AArch64 version. + Copyright (C) 2021-2024 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <dl-diagnostics.h> + +#include <cpu-features.h> +#include <dl-iterate_cpu.h> +#include <ldsodefs.h> +#include <sys/auxv.h> + +static void +print_cpu_features_value (const char *label, uint64_t value) +{ + _dl_printf ("aarch64.cpu_features."); + _dl_diagnostics_print_labeled_value (label, value); +} + +static void +print_per_cpu_value (const struct dl_iterate_cpu *dic, + const char *label, uint64_t value) +{ + _dl_printf ("aarch64.processor[0x%x].", dic->processor_index); + _dl_diagnostics_print_labeled_value (label, value); +} + +void +_dl_diagnostics_cpu (void) +{ + print_cpu_features_value ("bti", GLRO (dl_aarch64_cpu_features).bti); + print_cpu_features_value ("midr_el1", + GLRO (dl_aarch64_cpu_features).midr_el1); + print_cpu_features_value ("mops", GLRO (dl_aarch64_cpu_features).mops); + print_cpu_features_value ("mte_state", + GLRO (dl_aarch64_cpu_features).mte_state); + print_cpu_features_value ("prefer_sve_ifuncs", + GLRO (dl_aarch64_cpu_features).prefer_sve_ifuncs); + print_cpu_features_value ("sve", GLRO (dl_aarch64_cpu_features).sve); + print_cpu_features_value ("zva_size", + GLRO (dl_aarch64_cpu_features).zva_size); + + struct dl_iterate_cpu dic; + _dl_iterate_cpu_init (&dic); + + while (_dl_iterate_cpu_next (&dic)) + { + if (dic.requested_cpu >= 0) + _dl_printf ("aarch64.processor[0x%x].requested=0x%x\n", + dic.processor_index, dic.requested_cpu); + if (dic.actual_cpu >= 0) + _dl_printf ("aarch64.processor[0x%x].observed=0x%x\n", + dic.processor_index, dic.actual_cpu); + if (dic.actual_node >= 0) + _dl_printf ("aarch64.processor[0x%x].observed_node=0x%x\n", + dic.processor_index, dic.actual_node); + + if (GLRO (dl_hwcap) & HWCAP_CPUID) + { + uint64_t midr_el1; + asm ("mrs %0, midr_el1" : "=r" (midr_el1)); + print_per_cpu_value (&dic, "midr_el1", midr_el1); + } + + { + uint64_t dczid_el0; + asm ("mrs %0, dczid_el0" : "=r" (dczid_el0)); + print_per_cpu_value (&dic, "dczid_el0", dczid_el0); + } + } +} |