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
18static struct option set_opts[] = {
19     {"perf-bias", optional_argument, NULL, 'b'},
20     { },
21};
22
23static void print_wrong_arg_exit(void)
24{
25	printf(_("invalid or unknown argument\n"));
26	exit(EXIT_FAILURE);
27}
28
29int cmd_info(int argc, char **argv)
30{
31	extern char *optarg;
32	extern int optind, opterr, optopt;
33	unsigned int cpu;
34	struct utsname uts;
35
36	union {
37		struct {
38			int perf_bias:1;
39		};
40		int params;
41	} params = {};
42	int ret = 0;
43
44	ret = uname(&uts);
45	if (!ret && (!strcmp(uts.machine, "ppc64le") ||
46		     !strcmp(uts.machine, "ppc64"))) {
47		fprintf(stderr, _("Subcommand not supported on POWER.\n"));
48		return ret;
49	}
50
51	setlocale(LC_ALL, "");
52	textdomain(PACKAGE);
53
54	/* parameter parsing */
55	while ((ret = getopt_long(argc, argv, "b", set_opts, NULL)) != -1) {
56		switch (ret) {
57		case 'b':
58			if (params.perf_bias)
59				print_wrong_arg_exit();
60			params.perf_bias = 1;
61			break;
62		default:
63			print_wrong_arg_exit();
64		}
65	}
66
67	if (!params.params)
68		params.params = 0x7;
69
70	/* Default is: show output of base_cpu only */
71	if (bitmask_isallclear(cpus_chosen))
72		bitmask_setbit(cpus_chosen, base_cpu);
73
74	/* Add more per cpu options here */
75	if (!params.perf_bias)
76		return ret;
77
78	if (params.perf_bias) {
79		if (!run_as_root) {
80			params.perf_bias = 0;
81			printf(_("Intel's performance bias setting needs root privileges\n"));
82		} else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
83			printf(_("System does not support Intel's performance"
84				 " bias setting\n"));
85			params.perf_bias = 0;
86		}
87	}
88
89	/* loop over CPUs */
90	for (cpu = bitmask_first(cpus_chosen);
91	     cpu <= bitmask_last(cpus_chosen); cpu++) {
92
93		if (!bitmask_isbitset(cpus_chosen, cpu))
94			continue;
95
96		printf(_("analyzing CPU %d:\n"), cpu);
97
98		if (sysfs_is_cpu_online(cpu) != 1){
99			printf(_(" *is offline\n"));
100			continue;
101		}
102
103		if (params.perf_bias) {
104			ret = cpupower_intel_get_perf_bias(cpu);
105			if (ret < 0) {
106				fprintf(stderr,
107			_("Could not read perf-bias value[%d]\n"), ret);
108				exit(EXIT_FAILURE);
109			} else
110				printf(_("perf-bias: %d\n"), ret);
111		}
112	}
113	return 0;
114}
115