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
print_wrong_arg_exit(void)23 static void print_wrong_arg_exit(void)
24 {
25 printf(_("invalid or unknown argument\n"));
26 exit(EXIT_FAILURE);
27 }
28
cmd_info(int argc,char ** argv)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 = 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