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 {"epp", required_argument, NULL, 'e'},
22 {"amd-pstate-mode", required_argument, NULL, 'm'},
23 {"turbo-boost", required_argument, NULL, 't'},
24 {"boost", required_argument, NULL, 't'},
25 { },
26 };
27
print_wrong_arg_exit(void)28 static void print_wrong_arg_exit(void)
29 {
30 printf(_("invalid or unknown argument\n"));
31 exit(EXIT_FAILURE);
32 }
33
cmd_set(int argc,char ** argv)34 int cmd_set(int argc, char **argv)
35 {
36 extern char *optarg;
37 extern int optind, opterr, optopt;
38 unsigned int cpu;
39 struct utsname uts;
40
41 union {
42 struct {
43 int perf_bias:1;
44 int epp:1;
45 int mode:1;
46 int turbo_boost:1;
47 };
48 int params;
49 } params;
50 int perf_bias = 0, turbo_boost = 1;
51 int ret = 0;
52 char epp[30], mode[20];
53
54 ret = uname(&uts);
55 if (!ret && (!strcmp(uts.machine, "ppc64le") ||
56 !strcmp(uts.machine, "ppc64"))) {
57 fprintf(stderr, _("Subcommand not supported on POWER.\n"));
58 return ret;
59 }
60
61 setlocale(LC_ALL, "");
62 textdomain(PACKAGE);
63
64 params.params = 0;
65 /* parameter parsing */
66 while ((ret = getopt_long(argc, argv, "b:e:m:t:",
67 set_opts, NULL)) != -1) {
68 switch (ret) {
69 case 'b':
70 if (params.perf_bias)
71 print_wrong_arg_exit();
72 perf_bias = atoi(optarg);
73 if (perf_bias < 0 || perf_bias > 15) {
74 printf(_("--perf-bias param out "
75 "of range [0-%d]\n"), 15);
76 print_wrong_arg_exit();
77 }
78 params.perf_bias = 1;
79 break;
80 case 'e':
81 if (params.epp)
82 print_wrong_arg_exit();
83 if (sscanf(optarg, "%29s", epp) != 1) {
84 print_wrong_arg_exit();
85 return -EINVAL;
86 }
87 params.epp = 1;
88 break;
89 case 'm':
90 if (cpupower_cpu_info.vendor != X86_VENDOR_AMD)
91 print_wrong_arg_exit();
92 if (params.mode)
93 print_wrong_arg_exit();
94 if (sscanf(optarg, "%19s", mode) != 1) {
95 print_wrong_arg_exit();
96 return -EINVAL;
97 }
98 params.mode = 1;
99 break;
100 case 't':
101 if (params.turbo_boost)
102 print_wrong_arg_exit();
103 turbo_boost = atoi(optarg);
104 if (turbo_boost < 0 || turbo_boost > 1) {
105 printf("--turbo-boost param out of range [0-1]\n");
106 print_wrong_arg_exit();
107 }
108 params.turbo_boost = 1;
109 break;
110
111
112 default:
113 print_wrong_arg_exit();
114 }
115 }
116
117 if (!params.params)
118 print_wrong_arg_exit();
119
120 if (params.mode) {
121 ret = cpupower_set_amd_pstate_mode(mode);
122 if (ret)
123 fprintf(stderr, "Error setting mode\n");
124 }
125
126 if (params.turbo_boost) {
127 ret = cpupower_set_turbo_boost(turbo_boost);
128 if (ret)
129 fprintf(stderr, "Error setting turbo-boost\n");
130 }
131
132 /* Default is: set all CPUs */
133 if (bitmask_isallclear(cpus_chosen))
134 bitmask_setall(cpus_chosen);
135
136 /* loop over CPUs */
137 for (cpu = bitmask_first(cpus_chosen);
138 cpu <= bitmask_last(cpus_chosen); cpu++) {
139
140 if (!bitmask_isbitset(cpus_chosen, cpu))
141 continue;
142
143 if (sysfs_is_cpu_online(cpu) != 1){
144 fprintf(stderr, _("Cannot set values on CPU %d:"), cpu);
145 fprintf(stderr, _(" *is offline\n"));
146 continue;
147 }
148
149 if (params.perf_bias) {
150 ret = cpupower_intel_set_perf_bias(cpu, perf_bias);
151 if (ret) {
152 fprintf(stderr, _("Error setting perf-bias "
153 "value on CPU %d\n"), cpu);
154 break;
155 }
156 }
157
158 if (params.epp) {
159 ret = cpupower_set_epp(cpu, epp);
160 if (ret) {
161 fprintf(stderr,
162 "Error setting epp value on CPU %d\n", cpu);
163 break;
164 }
165 }
166
167 }
168 return ret;
169 }
170