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 unsigned int cpu; 32 struct utsname uts; 33 34 union { 35 struct { 36 int perf_bias:1; 37 }; 38 int params; 39 } params = {}; 40 int ret = 0; 41 42 ret = uname(&uts); 43 if (!ret && (!strcmp(uts.machine, "ppc64le") || 44 !strcmp(uts.machine, "ppc64"))) { 45 fprintf(stderr, _("Subcommand not supported on POWER.\n")); 46 return ret; 47 } 48 49 setlocale(LC_ALL, ""); 50 textdomain(PACKAGE); 51 52 /* parameter parsing */ 53 while ((ret = getopt_long(argc, argv, "b", set_opts, NULL)) != -1) { 54 switch (ret) { 55 case 'b': 56 if (params.perf_bias) 57 print_wrong_arg_exit(); 58 params.perf_bias = 1; 59 break; 60 default: 61 print_wrong_arg_exit(); 62 } 63 } 64 65 if (!params.params) 66 params.params = 0x7; 67 68 /* Default is: show output of base_cpu only */ 69 if (bitmask_isallclear(cpus_chosen)) 70 bitmask_setbit(cpus_chosen, base_cpu); 71 72 /* Add more per cpu options here */ 73 if (!params.perf_bias) 74 return ret; 75 76 if (params.perf_bias) { 77 if (!run_as_root) { 78 params.perf_bias = 0; 79 printf(_("Intel's performance bias setting needs root privileges\n")); 80 } else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) { 81 printf(_("System does not support Intel's performance" 82 " bias setting\n")); 83 params.perf_bias = 0; 84 } 85 } 86 87 /* loop over CPUs */ 88 for (cpu = bitmask_first(cpus_chosen); 89 cpu <= bitmask_last(cpus_chosen); cpu++) { 90 91 if (!bitmask_isbitset(cpus_chosen, cpu)) 92 continue; 93 94 printf(_("analyzing CPU %d:\n"), cpu); 95 96 if (sysfs_is_cpu_online(cpu) != 1){ 97 printf(_(" *is offline\n")); 98 continue; 99 } 100 101 if (params.perf_bias) { 102 ret = cpupower_intel_get_perf_bias(cpu); 103 if (ret < 0) { 104 fprintf(stderr, 105 _("Could not read perf-bias value[%d]\n"), ret); 106 exit(EXIT_FAILURE); 107 } else 108 printf(_("perf-bias: %d\n"), ret); 109 } 110 } 111 return 0; 112 } 113