tools/perf/arch/s390/util/header.c

   1 /*
   2  * Implementation of get_cpuid().
   3  *
   4  * Copyright IBM Corp. 2014, 2018
   5  * Author(s): Alexander Yarygin <yarygin@linux.vnet.ibm.com>
   6  *            Thomas Richter <tmricht@linux.vnet.ibm.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License (version 2 only)
  10  * as published by the Free Software Foundation.
  11  */
  12
  13 #include <sys/types.h>
  14 #include <unistd.h>
  15 #include <stdio.h>
  16 #include <string.h>
  17 #include <ctype.h>
  18
  19 #include "../../util/header.h"
  20 #include "../../util/util.h"
  21
  22 #define SYSINFO_MANU    "Manufacturer:"
  23 #define SYSINFO_TYPE    "Type:"
  24 #define SYSINFO_MODEL   "Model:"
  25 #define SRVLVL_CPUMF    "CPU-MF:"
  26 #define SRVLVL_VERSION  "version="
  27 #define SRVLVL_AUTHORIZATION    "authorization="
  28 #define SYSINFO         "/proc/sysinfo"
  29 #define SRVLVL          "/proc/service_levels"
  30
  31 int get_cpuid(char *buffer, size_t sz)
  32 {
  33         char *cp, *line = NULL, *line2;
  34         char type[8], model[33], version[8], manufacturer[32], authorization[8];
  35         int tpsize = 0, mdsize = 0, vssize = 0, mfsize = 0, atsize = 0;
  36         int read;
  37         unsigned long line_sz;
  38         size_t nbytes;
  39         FILE *sysinfo;
  40
  41         /*
  42          * Scan /proc/sysinfo line by line and read out values for
  43          * Manufacturer:, Type: and Model:, for example:
  44          * Manufacturer:    IBM
  45          * Type:            2964
  46          * Model:           702              N96
  47          * The first word is the Model Capacity and the second word is
  48          * Model (can be omitted). Both words have a maximum size of 16
  49          * bytes.
  50          */
  51         memset(manufacturer, 0, sizeof(manufacturer));
  52         memset(type, 0, sizeof(type));
  53         memset(model, 0, sizeof(model));
  54         memset(version, 0, sizeof(version));
  55         memset(authorization, 0, sizeof(authorization));
  56
  57         sysinfo = fopen(SYSINFO, "r");
  58         if (sysinfo == NULL)
  59                 return -1;
  60
  61         while ((read = getline(&line, &line_sz, sysinfo)) != -1) {
  62                 if (!strncmp(line, SYSINFO_MANU, strlen(SYSINFO_MANU))) {
  63                         line2 = line + strlen(SYSINFO_MANU);
  64
  65                         while ((cp = strtok_r(line2, "\n ", &line2))) {
  66                                 mfsize += scnprintf(manufacturer + mfsize,
  67                                                     sizeof(manufacturer) - mfsize, "%s", cp);
  68                         }
  69                 }
  70
  71                 if (!strncmp(line, SYSINFO_TYPE, strlen(SYSINFO_TYPE))) {
  72                         line2 = line + strlen(SYSINFO_TYPE);
  73
  74                         while ((cp = strtok_r(line2, "\n ", &line2))) {
  75                                 tpsize += scnprintf(type + tpsize,
  76                                                     sizeof(type) - tpsize, "%s", cp);
  77                         }
  78                 }
  79
  80                 if (!strncmp(line, SYSINFO_MODEL, strlen(SYSINFO_MODEL))) {
  81                         line2 = line + strlen(SYSINFO_MODEL);
  82
  83                         while ((cp = strtok_r(line2, "\n ", &line2))) {
  84                                 mdsize += scnprintf(model + mdsize, sizeof(model) - mdsize,
  85                                                     "%s%s", model[0] ? "," : "", cp);
  86                         }
  87                         break;
  88                 }
  89         }
  90         fclose(sysinfo);
  91
  92         /* Missing manufacturer, type or model information should not happen */
  93         if (!manufacturer[0] || !type[0] || !model[0])
  94                 return -1;
  95
  96         /*
  97          * Scan /proc/service_levels and return the CPU-MF counter facility
  98          * version number and authorization level.
  99          * Optional, does not exist on z/VM guests.
 100          */
 101         sysinfo = fopen(SRVLVL, "r");
 102         if (sysinfo == NULL)
 103                 goto skip_sysinfo;
 104         while ((read = getline(&line, &line_sz, sysinfo)) != -1) {
 105                 if (strncmp(line, SRVLVL_CPUMF, strlen(SRVLVL_CPUMF)))
 106                         continue;
 107
 108                 line2 = line + strlen(SRVLVL_CPUMF);
 109                 while ((cp = strtok_r(line2, "\n ", &line2))) {
 110                         if (!strncmp(cp, SRVLVL_VERSION,
 111                                      strlen(SRVLVL_VERSION))) {
 112                                 char *sep = strchr(cp, '=');
 113
 114                                 vssize += scnprintf(version + vssize,
 115                                                     sizeof(version) - vssize, "%s", sep + 1);
 116                         }
 117                         if (!strncmp(cp, SRVLVL_AUTHORIZATION,
 118                                      strlen(SRVLVL_AUTHORIZATION))) {
 119                                 char *sep = strchr(cp, '=');
 120
 121                                 atsize += scnprintf(authorization + atsize,
 122                                                     sizeof(authorization) - atsize, "%s", sep + 1);
 123                         }
 124                 }
 125         }
 126         fclose(sysinfo);
 127
 128 skip_sysinfo:
 129         free(line);
 130
 131         if (version[0] && authorization[0] )
 132                 nbytes = snprintf(buffer, sz, "%s,%s,%s,%s,%s",
 133                                   manufacturer, type, model, version,
 134                                   authorization);
 135         else
 136                 nbytes = snprintf(buffer, sz, "%s,%s,%s", manufacturer, type,
 137                                   model);
 138         return (nbytes >= sz) ? -1 : 0;
 139 }
 140
 141 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
 142 {
 143         char *buf = malloc(128);
 144
 145         if (buf && get_cpuid(buf, 128) < 0)
 146                 zfree(&buf);
 147         return buf;
 148 }