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7fe2f639 DB |
1 | /* |
2 | * (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc. | |
3 | * | |
4 | * Licensed under the terms of the GNU GPL License version 2. | |
5 | */ | |
6 | ||
7 | ||
8 | #include <unistd.h> | |
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <errno.h> | |
12 | #include <string.h> | |
13 | #include <getopt.h> | |
14 | ||
15 | #include <cpufreq.h> | |
16 | #include "helpers/helpers.h" | |
17 | #include "helpers/sysfs.h" | |
18 | #include "helpers/bitmask.h" | |
19 | ||
7fe2f639 | 20 | static struct option set_opts[] = { |
57ab3b08 | 21 | {"perf-bias", required_argument, NULL, 'b'}, |
7fe2f639 DB |
22 | { }, |
23 | }; | |
24 | ||
25 | static void print_wrong_arg_exit(void) | |
26 | { | |
27 | printf(_("invalid or unknown argument\n")); | |
7fe2f639 DB |
28 | exit(EXIT_FAILURE); |
29 | } | |
30 | ||
31 | int cmd_set(int argc, char **argv) | |
32 | { | |
33 | extern char *optarg; | |
34 | extern int optind, opterr, optopt; | |
35 | unsigned int cpu; | |
36 | ||
37 | union { | |
38 | struct { | |
7fe2f639 DB |
39 | int perf_bias:1; |
40 | }; | |
41 | int params; | |
7fe2f639 | 42 | } params; |
7ea1bdb8 | 43 | int perf_bias = 0; |
7fe2f639 DB |
44 | int ret = 0; |
45 | ||
46 | setlocale(LC_ALL, ""); | |
a1ce5ba2 | 47 | textdomain(PACKAGE); |
7fe2f639 DB |
48 | |
49 | params.params = 0; | |
50 | /* parameter parsing */ | |
7ea1bdb8 | 51 | while ((ret = getopt_long(argc, argv, "b:", |
a1ce5ba2 | 52 | set_opts, NULL)) != -1) { |
7fe2f639 | 53 | switch (ret) { |
7fe2f639 DB |
54 | case 'b': |
55 | if (params.perf_bias) | |
56 | print_wrong_arg_exit(); | |
57 | perf_bias = atoi(optarg); | |
58 | if (perf_bias < 0 || perf_bias > 15) { | |
59 | printf(_("--perf-bias param out " | |
60 | "of range [0-%d]\n"), 15); | |
61 | print_wrong_arg_exit(); | |
62 | } | |
63 | params.perf_bias = 1; | |
64 | break; | |
7fe2f639 DB |
65 | default: |
66 | print_wrong_arg_exit(); | |
67 | } | |
68 | }; | |
69 | ||
498ca793 DB |
70 | if (!params.params) |
71 | print_wrong_arg_exit(); | |
7fe2f639 | 72 | |
7fe2f639 DB |
73 | /* Default is: set all CPUs */ |
74 | if (bitmask_isallclear(cpus_chosen)) | |
75 | bitmask_setall(cpus_chosen); | |
76 | ||
77 | /* loop over CPUs */ | |
78 | for (cpu = bitmask_first(cpus_chosen); | |
79 | cpu <= bitmask_last(cpus_chosen); cpu++) { | |
a1ce5ba2 | 80 | |
7fe2f639 DB |
81 | if (!bitmask_isbitset(cpus_chosen, cpu) || |
82 | cpufreq_cpu_exists(cpu)) | |
83 | continue; | |
84 | ||
85 | if (params.perf_bias) { | |
86 | ret = msr_intel_set_perf_bias(cpu, perf_bias); | |
87 | if (ret) { | |
88 | fprintf(stderr, _("Error setting perf-bias " | |
89 | "value on CPU %d\n"), cpu); | |
90 | break; | |
91 | } | |
92 | } | |
93 | } | |
94 | return ret; | |
95 | } |