cpupower-set.c

  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
 19static 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
 28static void print_wrong_arg_exit(void)
 29{
 30	printf(_("invalid or unknown argument\n"));
 31	exit(EXIT_FAILURE);
 32}
 33
 34int 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}