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 base_cpu only */ 71 if (bitmask_isallclear(cpus_chosen)) 72 bitmask_setbit(cpus_chosen, base_cpu); 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 = cpupower_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 } 115