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 <fcntl.h>
   7 #include <stdio.h>
   8 #include <linux/kernel.h>
   9 #include <linux/limits.h>
  10
  11 /* Simulated format definitions. */
  12 static struct test_format {
  13         const char *name;
  14         const char *value;
  15 } test_formats[] = {
  16         { "krava01", "config:0-1,62-63\n", },
  17         { "krava02", "config:10-17\n", },
  18         { "krava03", "config:5\n", },
  19         { "krava11", "config1:0,2,4,6,8,20-28\n", },
  20         { "krava12", "config1:63\n", },
  21         { "krava13", "config1:45-47\n", },
  22         { "krava21", "config2:0-3,10-13,20-23,30-33,40-43,50-53,60-63\n", },
  23         { "krava22", "config2:8,18,48,58\n", },
  24         { "krava23", "config2:28-29,38\n", },
  25 };
  26
  27 /* Simulated users input. */
  28 static struct parse_events_term test_terms[] = {
  29         {
  30                 .config    = (char *) "krava01",
  31                 .val.num   = 15,
  32                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  33                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  34         },
  35         {
  36                 .config    = (char *) "krava02",
  37                 .val.num   = 170,
  38                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  39                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  40         },
  41         {
  42                 .config    = (char *) "krava03",
  43                 .val.num   = 1,
  44                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  45                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  46         },
  47         {
  48                 .config    = (char *) "krava11",
  49                 .val.num   = 27,
  50                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  51                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  52         },
  53         {
  54                 .config    = (char *) "krava12",
  55                 .val.num   = 1,
  56                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  57                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  58         },
  59         {
  60                 .config    = (char *) "krava13",
  61                 .val.num   = 2,
  62                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  63                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  64         },
  65         {
  66                 .config    = (char *) "krava21",
  67                 .val.num   = 119,
  68                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  69                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  70         },
  71         {
  72                 .config    = (char *) "krava22",
  73                 .val.num   = 11,
  74                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  75                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  76         },
  77         {
  78                 .config    = (char *) "krava23",
  79                 .val.num   = 2,
  80                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  81                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  82         },
  83 };
  84
  85 /*
  86  * Prepare format directory data, exported by kernel
  87  * at /sys/bus/event_source/devices/<dev>/format.
  88  */
  89 static char *test_format_dir_get(void)
  90 {
  91         static char dir[PATH_MAX];
  92         unsigned int i;
  93
  94         snprintf(dir, PATH_MAX, "/tmp/perf-pmu-test-format-XXXXXX");
  95         if (!mkdtemp(dir))
  96                 return NULL;
  97
  98         for (i = 0; i < ARRAY_SIZE(test_formats); i++) {
  99                 static char name[PATH_MAX];
 100                 struct test_format *format = &test_formats[i];
 101                 FILE *file;
 102
 103                 scnprintf(name, PATH_MAX, "%s/%s", dir, format->name);
 104
 105                 file = fopen(name, "w");
 106                 if (!file)
 107                         return NULL;
 108
 109                 if (1 != fwrite(format->value, strlen(format->value), 1, file))
 110                         break;
 111
 112                 fclose(file);
 113         }
 114
 115         return dir;
 116 }
 117
 118 /* Cleanup format directory. */
 119 static int test_format_dir_put(char *dir)
 120 {
 121         char buf[PATH_MAX];
 122         snprintf(buf, PATH_MAX, "rm -f %s/*\n", dir);
 123         if (system(buf))
 124                 return -1;
 125
 126         snprintf(buf, PATH_MAX, "rmdir %s\n", dir);
 127         return system(buf);
 128 }
 129
 130 static struct list_head *test_terms_list(void)
 131 {
 132         static LIST_HEAD(terms);
 133         unsigned int i;
 134
 135         for (i = 0; i < ARRAY_SIZE(test_terms); i++)
 136                 list_add_tail(&test_terms[i].list, &terms);
 137
 138         return &terms;
 139 }
 140
 141 static int test__pmu(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
 142 {
 143         char *format = test_format_dir_get();
 144         LIST_HEAD(formats);
 145         struct list_head *terms = test_terms_list();
 146         int ret;
 147
 148         if (!format)
 149                 return -EINVAL;
 150
 151         do {
 152                 struct perf_event_attr attr;
 153                 int fd;
 154
 155                 memset(&attr, 0, sizeof(attr));
 156
 157                 fd = open(format, O_DIRECTORY);
 158                 if (fd < 0) {
 159                         ret = fd;
 160                         break;
 161                 }
 162                 ret = perf_pmu__format_parse(fd, &formats);
 163                 if (ret)
 164                         break;
 165
 166                 ret = perf_pmu__config_terms("perf-pmu-test", &formats, &attr,
 167                                              terms, false, NULL);
 168                 if (ret)
 169                         break;
 170
 171                 ret = -EINVAL;
 172
 173                 if (attr.config  != 0xc00000000002a823)
 174                         break;
 175                 if (attr.config1 != 0x8000400000000145)
 176                         break;
 177                 if (attr.config2 != 0x0400000020041d07)
 178                         break;
 179
 180                 ret = 0;
 181         } while (0);
 182
 183         perf_pmu__del_formats(&formats);
 184         test_format_dir_put(format);
 185         return ret;
 186 }
 187
 188 DEFINE_SUITE("Parse perf pmu format", pmu);