tools/perf/tests/pmu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "parse-events.h"
   3 #include "pmu.h"
   4 #include "tests.h"
   5 #include <errno.h>
   6 #include <stdio.h>
   7 #include <linux/kernel.h>
   8 #include <linux/limits.h>
   9
  10 /* Simulated format definitions. */
  11 static struct test_format {
  12         const char *name;
  13         const char *value;
  14 } test_formats[] = {
  15         { "krava01", "config:0-1,62-63\n", },
  16         { "krava02", "config:10-17\n", },
  17         { "krava03", "config:5\n", },
  18         { "krava11", "config1:0,2,4,6,8,20-28\n", },
  19         { "krava12", "config1:63\n", },
  20         { "krava13", "config1:45-47\n", },
  21         { "krava21", "config2:0-3,10-13,20-23,30-33,40-43,50-53,60-63\n", },
  22         { "krava22", "config2:8,18,48,58\n", },
  23         { "krava23", "config2:28-29,38\n", },
  24 };
  25
  26 /* Simulated users input. */
  27 static struct parse_events_term test_terms[] = {
  28         {
  29                 .config    = (char *) "krava01",
  30                 .val.num   = 15,
  31                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  32                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  33         },
  34         {
  35                 .config    = (char *) "krava02",
  36                 .val.num   = 170,
  37                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  38                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  39         },
  40         {
  41                 .config    = (char *) "krava03",
  42                 .val.num   = 1,
  43                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  44                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  45         },
  46         {
  47                 .config    = (char *) "krava11",
  48                 .val.num   = 27,
  49                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  50                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  51         },
  52         {
  53                 .config    = (char *) "krava12",
  54                 .val.num   = 1,
  55                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  56                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  57         },
  58         {
  59                 .config    = (char *) "krava13",
  60                 .val.num   = 2,
  61                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  62                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  63         },
  64         {
  65                 .config    = (char *) "krava21",
  66                 .val.num   = 119,
  67                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  68                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  69         },
  70         {
  71                 .config    = (char *) "krava22",
  72                 .val.num   = 11,
  73                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  74                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  75         },
  76         {
  77                 .config    = (char *) "krava23",
  78                 .val.num   = 2,
  79                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  80                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  81         },
  82 };
  83
  84 /*
  85  * Prepare format directory data, exported by kernel
  86  * at /sys/bus/event_source/devices/<dev>/format.
  87  */
  88 static char *test_format_dir_get(void)
  89 {
  90         static char dir[PATH_MAX];
  91         unsigned int i;
  92
  93         snprintf(dir, PATH_MAX, "/tmp/perf-pmu-test-format-XXXXXX");
  94         if (!mkdtemp(dir))
  95                 return NULL;
  96
  97         for (i = 0; i < ARRAY_SIZE(test_formats); i++) {
  98                 static char name[PATH_MAX];
  99                 struct test_format *format = &test_formats[i];
 100                 FILE *file;
 101
 102                 scnprintf(name, PATH_MAX, "%s/%s", dir, format->name);
 103
 104                 file = fopen(name, "w");
 105                 if (!file)
 106                         return NULL;
 107
 108                 if (1 != fwrite(format->value, strlen(format->value), 1, file))
 109                         break;
 110
 111                 fclose(file);
 112         }
 113
 114         return dir;
 115 }
 116
 117 /* Cleanup format directory. */
 118 static int test_format_dir_put(char *dir)
 119 {
 120         char buf[PATH_MAX];
 121         snprintf(buf, PATH_MAX, "rm -f %s/*\n", dir);
 122         if (system(buf))
 123                 return -1;
 124
 125         snprintf(buf, PATH_MAX, "rmdir %s\n", dir);
 126         return system(buf);
 127 }
 128
 129 static struct list_head *test_terms_list(void)
 130 {
 131         static LIST_HEAD(terms);
 132         unsigned int i;
 133
 134         for (i = 0; i < ARRAY_SIZE(test_terms); i++)
 135                 list_add_tail(&test_terms[i].list, &terms);
 136
 137         return &terms;
 138 }
 139
 140 int test__pmu(struct test *test __maybe_unused, int subtest __maybe_unused)
 141 {
 142         char *format = test_format_dir_get();
 143         LIST_HEAD(formats);
 144         struct list_head *terms = test_terms_list();
 145         int ret;
 146
 147         if (!format)
 148                 return -EINVAL;
 149
 150         do {
 151                 struct perf_event_attr attr;
 152
 153                 memset(&attr, 0, sizeof(attr));
 154
 155                 ret = perf_pmu__format_parse(format, &formats);
 156                 if (ret)
 157                         break;
 158
 159                 ret = perf_pmu__config_terms("perf-pmu-test", &formats, &attr,
 160                                              terms, false, NULL);
 161                 if (ret)
 162                         break;
 163
 164                 ret = -EINVAL;
 165
 166                 if (attr.config  != 0xc00000000002a823)
 167                         break;
 168                 if (attr.config1 != 0x8000400000000145)
 169                         break;
 170                 if (attr.config2 != 0x0400000020041d07)
 171                         break;
 172
 173                 ret = 0;
 174         } while (0);
 175
 176         perf_pmu__del_formats(&formats);
 177         test_format_dir_put(format);
 178         return ret;
 179 }