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 struct list_head *test_terms_list(void) 132 { 133 static LIST_HEAD(terms); 134 unsigned int i; 135 136 for (i = 0; i < ARRAY_SIZE(test_terms); i++) 137 list_add_tail(&test_terms[i].list, &terms); 138 139 return &terms; 140 } 141 142 static int test__pmu(struct test_suite *test __maybe_unused, int subtest __maybe_unused) 143 { 144 char dir[PATH_MAX]; 145 char *format; 146 struct list_head *terms = test_terms_list(); 147 struct perf_event_attr attr; 148 struct perf_pmu *pmu; 149 int fd; 150 int ret; 151 152 pmu = zalloc(sizeof(*pmu)); 153 if (!pmu) 154 return -ENOMEM; 155 156 INIT_LIST_HEAD(&pmu->format); 157 INIT_LIST_HEAD(&pmu->aliases); 158 INIT_LIST_HEAD(&pmu->caps); 159 format = test_format_dir_get(dir, sizeof(dir)); 160 if (!format) { 161 free(pmu); 162 return -EINVAL; 163 } 164 165 memset(&attr, 0, sizeof(attr)); 166 167 fd = open(format, O_DIRECTORY); 168 if (fd < 0) { 169 ret = fd; 170 goto out; 171 } 172 173 pmu->name = strdup("perf-pmu-test"); 174 ret = perf_pmu__format_parse(pmu, fd, /*eager_load=*/true); 175 if (ret) 176 goto out; 177 178 ret = perf_pmu__config_terms(pmu, &attr, terms, /*zero=*/false, /*err=*/NULL); 179 if (ret) 180 goto out; 181 182 ret = -EINVAL; 183 if (attr.config != 0xc00000000002a823) 184 goto out; 185 if (attr.config1 != 0x8000400000000145) 186 goto out; 187 if (attr.config2 != 0x0400000020041d07) 188 goto out; 189 190 ret = 0; 191 out: 192 test_format_dir_put(format); 193 perf_pmu__delete(pmu); 194 return ret; 195 } 196 197 DEFINE_SUITE("Parse perf pmu format", pmu); 198