tools/perf/tests/pmu.c

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