summaryrefslogtreecommitdiff
path: root/tools/perf/arch/s390/util/header.c
blob: 7933f6871c8180e73a5fb33b57e14a65cbffda5e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Implementation of get_cpuid().
 *
 * Copyright IBM Corp. 2014, 2018
 * Author(s): Alexander Yarygin <yarygin@linux.vnet.ibm.com>
 *	      Thomas Richter <tmricht@linux.vnet.ibm.com>
 */

#include <sys/types.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
#include <linux/zalloc.h>

#include "../../util/header.h"

#define SYSINFO_MANU	"Manufacturer:"
#define SYSINFO_TYPE	"Type:"
#define SYSINFO_MODEL	"Model:"
#define SRVLVL_CPUMF	"CPU-MF:"
#define SRVLVL_VERSION	"version="
#define SRVLVL_AUTHORIZATION	"authorization="
#define SYSINFO		"/proc/sysinfo"
#define SRVLVL		"/proc/service_levels"

int get_cpuid(char *buffer, size_t sz)
{
	char *cp, *line = NULL, *line2;
	char type[8], model[33], version[8], manufacturer[32], authorization[8];
	int tpsize = 0, mdsize = 0, vssize = 0, mfsize = 0, atsize = 0;
	int read;
	unsigned long line_sz;
	size_t nbytes;
	FILE *sysinfo;

	/*
	 * Scan /proc/sysinfo line by line and read out values for
	 * Manufacturer:, Type: and Model:, for example:
	 * Manufacturer:    IBM
	 * Type:            2964
	 * Model:           702              N96
	 * The first word is the Model Capacity and the second word is
	 * Model (can be omitted). Both words have a maximum size of 16
	 * bytes.
	 */
	memset(manufacturer, 0, sizeof(manufacturer));
	memset(type, 0, sizeof(type));
	memset(model, 0, sizeof(model));
	memset(version, 0, sizeof(version));
	memset(authorization, 0, sizeof(authorization));

	sysinfo = fopen(SYSINFO, "r");
	if (sysinfo == NULL)
		return errno;

	while ((read = getline(&line, &line_sz, sysinfo)) != -1) {
		if (!strncmp(line, SYSINFO_MANU, strlen(SYSINFO_MANU))) {
			line2 = line + strlen(SYSINFO_MANU);

			while ((cp = strtok_r(line2, "\n ", &line2))) {
				mfsize += scnprintf(manufacturer + mfsize,
						    sizeof(manufacturer) - mfsize, "%s", cp);
			}
		}

		if (!strncmp(line, SYSINFO_TYPE, strlen(SYSINFO_TYPE))) {
			line2 = line + strlen(SYSINFO_TYPE);

			while ((cp = strtok_r(line2, "\n ", &line2))) {
				tpsize += scnprintf(type + tpsize,
						    sizeof(type) - tpsize, "%s", cp);
			}
		}

		if (!strncmp(line, SYSINFO_MODEL, strlen(SYSINFO_MODEL))) {
			line2 = line + strlen(SYSINFO_MODEL);

			while ((cp = strtok_r(line2, "\n ", &line2))) {
				mdsize += scnprintf(model + mdsize, sizeof(model) - mdsize,
						    "%s%s", model[0] ? "," : "", cp);
			}
			break;
		}
	}
	fclose(sysinfo);

	/* Missing manufacturer, type or model information should not happen */
	if (!manufacturer[0] || !type[0] || !model[0])
		return EINVAL;

	/*
	 * Scan /proc/service_levels and return the CPU-MF counter facility
	 * version number and authorization level.
	 * Optional, does not exist on z/VM guests.
	 */
	sysinfo = fopen(SRVLVL, "r");
	if (sysinfo == NULL)
		goto skip_sysinfo;
	while ((read = getline(&line, &line_sz, sysinfo)) != -1) {
		if (strncmp(line, SRVLVL_CPUMF, strlen(SRVLVL_CPUMF)))
			continue;

		line2 = line + strlen(SRVLVL_CPUMF);
		while ((cp = strtok_r(line2, "\n ", &line2))) {
			if (!strncmp(cp, SRVLVL_VERSION,
				     strlen(SRVLVL_VERSION))) {
				char *sep = strchr(cp, '=');

				vssize += scnprintf(version + vssize,
						    sizeof(version) - vssize, "%s", sep + 1);
			}
			if (!strncmp(cp, SRVLVL_AUTHORIZATION,
				     strlen(SRVLVL_AUTHORIZATION))) {
				char *sep = strchr(cp, '=');

				atsize += scnprintf(authorization + atsize,
						    sizeof(authorization) - atsize, "%s", sep + 1);
			}
		}
	}
	fclose(sysinfo);

skip_sysinfo:
	free(line);

	if (version[0] && authorization[0] )
		nbytes = snprintf(buffer, sz, "%s,%s,%s,%s,%s",
				  manufacturer, type, model, version,
				  authorization);
	else
		nbytes = snprintf(buffer, sz, "%s,%s,%s", manufacturer, type,
				  model);
	return (nbytes >= sz) ? ENOBUFS : 0;
}

char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
{
	char *buf = malloc(128);

	if (buf && get_cpuid(buf, 128))
		zfree(&buf);
	return buf;
}