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 #include <linux/zalloc.h>
  11
  12 /* Simulated format definitions. */
  13 static struct test_format {
  14         const char *name;
  15         const char *value;
  16 } test_formats[] = {
  17         { "krava01", "config:0-1,62-63\n", },
  18         { "krava02", "config:10-17\n", },
  19         { "krava03", "config:5\n", },
  20         { "krava11", "config1:0,2,4,6,8,20-28\n", },
  21         { "krava12", "config1:63\n", },
  22         { "krava13", "config1:45-47\n", },
  23         { "krava21", "config2:0-3,10-13,20-23,30-33,40-43,50-53,60-63\n", },
  24         { "krava22", "config2:8,18,48,58\n", },
  25         { "krava23", "config2:28-29,38\n", },
  26 };
  27
  28 /* Simulated users input. */
  29 static struct parse_events_term test_terms[] = {
  30         {
  31                 .config    = "krava01",
  32                 .val.num   = 15,
  33                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  34                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  35         },
  36         {
  37                 .config    = "krava02",
  38                 .val.num   = 170,
  39                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  40                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  41         },
  42         {
  43                 .config    = "krava03",
  44                 .val.num   = 1,
  45                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  46                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  47         },
  48         {
  49                 .config    = "krava11",
  50                 .val.num   = 27,
  51                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  52                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  53         },
  54         {
  55                 .config    = "krava12",
  56                 .val.num   = 1,
  57                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  58                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  59         },
  60         {
  61                 .config    = "krava13",
  62                 .val.num   = 2,
  63                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  64                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  65         },
  66         {
  67                 .config    = "krava21",
  68                 .val.num   = 119,
  69                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  70                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  71         },
  72         {
  73                 .config    = "krava22",
  74                 .val.num   = 11,
  75                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  76                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  77         },
  78         {
  79                 .config    = "krava23",
  80                 .val.num   = 2,
  81                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
  82                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
  83         },
  84 };
  85
  86 /*
  87  * Prepare format directory data, exported by kernel
  88  * at /sys/bus/event_source/devices/<dev>/format.
  89  */
  90 static char *test_format_dir_get(char *dir, size_t sz)
  91 {
  92         unsigned int i;
  93
  94         snprintf(dir, sz, "/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                 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 + 20];
 122
 123         snprintf(buf, sizeof(buf), "rm -f %s/*\n", dir);
 124         if (system(buf))
 125                 return -1;
 126
 127         snprintf(buf, sizeof(buf), "rmdir %s\n", dir);
 128         return system(buf);
 129 }
 130
 131 static void add_test_terms(struct parse_events_terms *terms)
 132 {
 133         unsigned int i;
 134
 135         for (i = 0; i < ARRAY_SIZE(test_terms); i++) {
 136                 struct parse_events_term *clone;
 137
 138                 parse_events_term__clone(&clone, &test_terms[i]);
 139                 list_add_tail(&clone->list, &terms->terms);
 140         }
 141 }
 142
 143 static int test__pmu(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
 144 {
 145         char dir[PATH_MAX];
 146         char *format;
 147         struct parse_events_terms terms;
 148         struct perf_event_attr attr;
 149         struct perf_pmu *pmu;
 150         int fd;
 151         int ret;
 152
 153         parse_events_terms__init(&terms);
 154         add_test_terms(&terms);
 155         pmu = zalloc(sizeof(*pmu));
 156         if (!pmu) {
 157                 parse_events_terms__exit(&terms);
 158                 return -ENOMEM;
 159         }
 160
 161         INIT_LIST_HEAD(&pmu->format);
 162         INIT_LIST_HEAD(&pmu->aliases);
 163         INIT_LIST_HEAD(&pmu->caps);
 164         format = test_format_dir_get(dir, sizeof(dir));
 165         if (!format) {
 166                 free(pmu);
 167                 parse_events_terms__exit(&terms);
 168                 return -EINVAL;
 169         }
 170
 171         memset(&attr, 0, sizeof(attr));
 172
 173         fd = open(format, O_DIRECTORY);
 174         if (fd < 0) {
 175                 ret = fd;
 176                 goto out;
 177         }
 178
 179         pmu->name = strdup("perf-pmu-test");
 180         ret = perf_pmu__format_parse(pmu, fd, /*eager_load=*/true);
 181         if (ret)
 182                 goto out;
 183
 184         ret = perf_pmu__config_terms(pmu, &attr, &terms, /*zero=*/false, /*err=*/NULL);
 185         if (ret)
 186                 goto out;
 187
 188         ret = -EINVAL;
 189         if (attr.config  != 0xc00000000002a823)
 190                 goto out;
 191         if (attr.config1 != 0x8000400000000145)
 192                 goto out;
 193         if (attr.config2 != 0x0400000020041d07)
 194                 goto out;
 195
 196         ret = 0;
 197 out:
 198         test_format_dir_put(format);
 199         perf_pmu__delete(pmu);
 200         parse_events_terms__exit(&terms);
 201         return ret;
 202 }
 203
 204 DEFINE_SUITE("Parse perf pmu format", pmu);