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