tools/power/cpupower/utils/cpupower-info.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
   4  */
   5
   6
   7 #include <unistd.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <errno.h>
  11 #include <string.h>
  12 #include <getopt.h>
  13 #include <sys/utsname.h>
  14
  15 #include "helpers/helpers.h"
  16 #include "helpers/sysfs.h"
  17
  18 static struct option set_opts[] = {
  19      {"perf-bias", optional_argument, NULL, 'b'},
  20      { },
  21 };
  22
  23 static void print_wrong_arg_exit(void)
  24 {
  25         printf(_("invalid or unknown argument\n"));
  26         exit(EXIT_FAILURE);
  27 }
  28
  29 int cmd_info(int argc, char **argv)
  30 {
  31         extern char *optarg;
  32         extern int optind, opterr, optopt;
  33         unsigned int cpu;
  34         struct utsname uts;
  35
  36         union {
  37                 struct {
  38                         int perf_bias:1;
  39                 };
  40                 int params;
  41         } params = {};
  42         int ret = 0;
  43
  44         ret = uname(&uts);
  45         if (!ret && (!strcmp(uts.machine, "ppc64le") ||
  46                      !strcmp(uts.machine, "ppc64"))) {
  47                 fprintf(stderr, _("Subcommand not supported on POWER.\n"));
  48                 return ret;
  49         }
  50
  51         setlocale(LC_ALL, "");
  52         textdomain(PACKAGE);
  53
  54         /* parameter parsing */
  55         while ((ret = getopt_long(argc, argv, "b", set_opts, NULL)) != -1) {
  56                 switch (ret) {
  57                 case 'b':
  58                         if (params.perf_bias)
  59                                 print_wrong_arg_exit();
  60                         params.perf_bias = 1;
  61                         break;
  62                 default:
  63                         print_wrong_arg_exit();
  64                 }
  65         };
  66
  67         if (!params.params)
  68                 params.params = 0x7;
  69
  70         /* Default is: show output of CPU 0 only */
  71         if (bitmask_isallclear(cpus_chosen))
  72                 bitmask_setbit(cpus_chosen, 0);
  73
  74         /* Add more per cpu options here */
  75         if (!params.perf_bias)
  76                 return ret;
  77
  78         if (params.perf_bias) {
  79                 if (!run_as_root) {
  80                         params.perf_bias = 0;
  81                         printf(_("Intel's performance bias setting needs root privileges\n"));
  82                 } else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
  83                         printf(_("System does not support Intel's performance"
  84                                  " bias setting\n"));
  85                         params.perf_bias = 0;
  86                 }
  87         }
  88
  89         /* loop over CPUs */
  90         for (cpu = bitmask_first(cpus_chosen);
  91              cpu <= bitmask_last(cpus_chosen); cpu++) {
  92
  93                 if (!bitmask_isbitset(cpus_chosen, cpu))
  94                         continue;
  95
  96                 printf(_("analyzing CPU %d:\n"), cpu);
  97
  98                 if (sysfs_is_cpu_online(cpu) != 1){
  99                         printf(_(" *is offline\n"));
 100                         continue;
 101                 }
 102
 103                 if (params.perf_bias) {
 104                         ret = msr_intel_get_perf_bias(cpu);
 105                         if (ret < 0) {
 106                                 fprintf(stderr,
 107                         _("Could not read perf-bias value[%d]\n"), ret);
 108                                 exit(EXIT_FAILURE);
 109                         } else
 110                                 printf(_("perf-bias: %d\n"), ret);
 111                 }
 112         }
 113         return 0;
 114 }