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