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 #include "helpers/bitmask.h"
18
19 static struct option set_opts[] = {
20 {"perf-bias", required_argument, NULL, 'b'},
21 { },
22 };
23
print_wrong_arg_exit(void)24 static void print_wrong_arg_exit(void)
25 {
26 printf(_("invalid or unknown argument\n"));
27 exit(EXIT_FAILURE);
28 }
29
cmd_set(int argc,char ** argv)30 int cmd_set(int argc, char **argv)
31 {
32 extern char *optarg;
33 extern int optind, opterr, optopt;
34 unsigned int cpu;
35 struct utsname uts;
36
37 union {
38 struct {
39 int perf_bias:1;
40 };
41 int params;
42 } params;
43 int perf_bias = 0;
44 int ret = 0;
45
46 ret = uname(&uts);
47 if (!ret && (!strcmp(uts.machine, "ppc64le") ||
48 !strcmp(uts.machine, "ppc64"))) {
49 fprintf(stderr, _("Subcommand not supported on POWER.\n"));
50 return ret;
51 }
52
53 setlocale(LC_ALL, "");
54 textdomain(PACKAGE);
55
56 params.params = 0;
57 /* parameter parsing */
58 while ((ret = getopt_long(argc, argv, "b:",
59 set_opts, NULL)) != -1) {
60 switch (ret) {
61 case 'b':
62 if (params.perf_bias)
63 print_wrong_arg_exit();
64 perf_bias = atoi(optarg);
65 if (perf_bias < 0 || perf_bias > 15) {
66 printf(_("--perf-bias param out "
67 "of range [0-%d]\n"), 15);
68 print_wrong_arg_exit();
69 }
70 params.perf_bias = 1;
71 break;
72 default:
73 print_wrong_arg_exit();
74 }
75 }
76
77 if (!params.params)
78 print_wrong_arg_exit();
79
80 /* Default is: set all CPUs */
81 if (bitmask_isallclear(cpus_chosen))
82 bitmask_setall(cpus_chosen);
83
84 /* loop over CPUs */
85 for (cpu = bitmask_first(cpus_chosen);
86 cpu <= bitmask_last(cpus_chosen); cpu++) {
87
88 if (!bitmask_isbitset(cpus_chosen, cpu))
89 continue;
90
91 if (sysfs_is_cpu_online(cpu) != 1){
92 fprintf(stderr, _("Cannot set values on CPU %d:"), cpu);
93 fprintf(stderr, _(" *is offline\n"));
94 continue;
95 }
96
97 if (params.perf_bias) {
98 ret = msr_intel_set_perf_bias(cpu, perf_bias);
99 if (ret) {
100 fprintf(stderr, _("Error setting perf-bias "
101 "value on CPU %d\n"), cpu);
102 break;
103 }
104 }
105 }
106 return ret;
107 }
108
