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 "helpers/helpers.h"
16 #include "helpers/sysfs.h"
17 
18 static struct option set_opts[] = {
19      {"perf-bias", optional_argument, NULL, 'b'},
20      { },
21 };
22 
23 static void print_wrong_arg_exit(void)
24 {
25 	printf(_("invalid or unknown argument\n"));
26 	exit(EXIT_FAILURE);
27 }
28 
29 int cmd_info(int argc, char **argv)
30 {
31 	extern char *optarg;
32 	extern int optind, opterr, optopt;
33 	unsigned int cpu;
34 
35 	union {
36 		struct {
37 			int perf_bias:1;
38 		};
39 		int params;
40 	} params = {};
41 	int ret = 0;
42 
43 	setlocale(LC_ALL, "");
44 	textdomain(PACKAGE);
45 
46 	/* parameter parsing */
47 	while ((ret = getopt_long(argc, argv, "b", set_opts, NULL)) != -1) {
48 		switch (ret) {
49 		case 'b':
50 			if (params.perf_bias)
51 				print_wrong_arg_exit();
52 			params.perf_bias = 1;
53 			break;
54 		default:
55 			print_wrong_arg_exit();
56 		}
57 	};
58 
59 	if (!params.params)
60 		params.params = 0x7;
61 
62 	/* Default is: show output of CPU 0 only */
63 	if (bitmask_isallclear(cpus_chosen))
64 		bitmask_setbit(cpus_chosen, 0);
65 
66 	/* Add more per cpu options here */
67 	if (!params.perf_bias)
68 		return ret;
69 
70 	if (params.perf_bias) {
71 		if (!run_as_root) {
72 			params.perf_bias = 0;
73 			printf(_("Intel's performance bias setting needs root privileges\n"));
74 		} else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
75 			printf(_("System does not support Intel's performance"
76 				 " bias setting\n"));
77 			params.perf_bias = 0;
78 		}
79 	}
80 
81 	/* loop over CPUs */
82 	for (cpu = bitmask_first(cpus_chosen);
83 	     cpu <= bitmask_last(cpus_chosen); cpu++) {
84 
85 		if (!bitmask_isbitset(cpus_chosen, cpu))
86 			continue;
87 
88 		printf(_("analyzing CPU %d:\n"), cpu);
89 
90 		if (sysfs_is_cpu_online(cpu) != 1){
91 			printf(_(" *is offline\n"));
92 			continue;
93 		}
94 
95 		if (params.perf_bias) {
96 			ret = msr_intel_get_perf_bias(cpu);
97 			if (ret < 0) {
98 				fprintf(stderr,
99 			_("Could not read perf-bias value[%d]\n"), ret);
100 				exit(EXIT_FAILURE);
101 			} else
102 				printf(_("perf-bias: %d\n"), ret);
103 		}
104 	}
105 	return 0;
106 }
107