1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __PMU_H 3 #define __PMU_H 4 5 #include <linux/bitmap.h> 6 #include <linux/compiler.h> 7 #include <linux/perf_event.h> 8 #include <linux/list.h> 9 #include <stdbool.h> 10 #include <stdio.h> 11 #include "parse-events.h" 12 #include "pmu-events/pmu-events.h" 13 #include "map_symbol.h" 14 #include "mem-events.h" 15 16 struct evsel_config_term; 17 struct perf_cpu_map; 18 struct print_callbacks; 19 20 enum { 21 PERF_PMU_FORMAT_VALUE_CONFIG, 22 PERF_PMU_FORMAT_VALUE_CONFIG1, 23 PERF_PMU_FORMAT_VALUE_CONFIG2, 24 PERF_PMU_FORMAT_VALUE_CONFIG3, 25 PERF_PMU_FORMAT_VALUE_CONFIG_END, 26 }; 27 28 #define PERF_PMU_FORMAT_BITS 64 29 #define MAX_PMU_NAME_LEN 128 30 31 struct perf_event_attr; 32 33 struct perf_pmu_caps { 34 char *name; 35 char *value; 36 struct list_head list; 37 }; 38 39 enum { 40 PERF_PMU_TYPE_HWMON_START = 0xFFFF0000, 41 PERF_PMU_TYPE_HWMON_END = 0xFFFFFFFD, 42 PERF_PMU_TYPE_TOOL = 0xFFFFFFFE, 43 PERF_PMU_TYPE_FAKE = 0xFFFFFFFF, 44 }; 45 46 /** 47 * struct perf_pmu 48 */ 49 struct perf_pmu { 50 /** @name: The name of the PMU such as "cpu". */ 51 const char *name; 52 /** 53 * @alias_name: Optional alternate name for the PMU determined in 54 * architecture specific code. 55 */ 56 char *alias_name; 57 /** 58 * @id: Optional PMU identifier read from 59 * <sysfs>/bus/event_source/devices/<name>/identifier. 60 */ 61 const char *id; 62 /** 63 * @type: Perf event attributed type value, read from 64 * <sysfs>/bus/event_source/devices/<name>/type. 65 */ 66 __u32 type; 67 /** 68 * @selectable: Can the PMU name be selected as if it were an event? 69 */ 70 bool selectable; 71 /** 72 * @is_core: Is the PMU the core CPU PMU? Determined by the name being 73 * "cpu" or by the presence of 74 * <sysfs>/bus/event_source/devices/<name>/cpus. There may be >1 core 75 * PMU on systems like Intel hybrid. 76 */ 77 bool is_core; 78 /** 79 * @is_uncore: Is the PMU not within the CPU core? Determined by the 80 * presence of <sysfs>/bus/event_source/devices/<name>/cpumask. 81 */ 82 bool is_uncore; 83 /** 84 * @auxtrace: Are events auxiliary events? Determined in architecture 85 * specific code. 86 */ 87 bool auxtrace; 88 /** 89 * @formats_checked: Only check PMU's formats are valid for 90 * perf_event_attr once. 91 */ 92 bool formats_checked; 93 /** @config_masks_present: Are there config format values? */ 94 bool config_masks_present; 95 /** @config_masks_computed: Set when masks are lazily computed. */ 96 bool config_masks_computed; 97 /** 98 * @max_precise: Number of levels of :ppp precision supported by the 99 * PMU, read from 100 * <sysfs>/bus/event_source/devices/<name>/caps/max_precise. 101 */ 102 int max_precise; 103 /** 104 * @perf_event_attr_init_default: Optional function to default 105 * initialize PMU specific parts of the perf_event_attr. 106 */ 107 void (*perf_event_attr_init_default)(const struct perf_pmu *pmu, 108 struct perf_event_attr *attr); 109 /** 110 * @cpus: Empty or the contents of either of: 111 * <sysfs>/bus/event_source/devices/<name>/cpumask. 112 * <sysfs>/bus/event_source/devices/<cpu>/cpus. 113 */ 114 struct perf_cpu_map *cpus; 115 /** 116 * @format: Holds the contents of files read from 117 * <sysfs>/bus/event_source/devices/<name>/format/. The contents specify 118 * which event parameter changes what config, config1 or config2 bits. 119 */ 120 struct list_head format; 121 /** 122 * @aliases: List of struct perf_pmu_alias. Each alias corresponds to an 123 * event read from <sysfs>/bus/event_source/devices/<name>/events/ or 124 * from json events in pmu-events.c. 125 */ 126 struct list_head aliases; 127 /** 128 * @events_table: The events table for json events in pmu-events.c. 129 */ 130 const struct pmu_events_table *events_table; 131 /** @sysfs_aliases: Number of sysfs aliases loaded. */ 132 uint32_t sysfs_aliases; 133 /** @cpu_json_aliases: Number of json event aliases loaded specific to the CPUID. */ 134 uint32_t cpu_json_aliases; 135 /** @sys_json_aliases: Number of json event aliases loaded matching the PMU's identifier. */ 136 uint32_t sys_json_aliases; 137 /** @sysfs_aliases_loaded: Are sysfs aliases loaded from disk? */ 138 bool sysfs_aliases_loaded; 139 /** 140 * @cpu_aliases_added: Have all json events table entries for the PMU 141 * been added? 142 */ 143 bool cpu_aliases_added; 144 /** @caps_initialized: Has the list caps been initialized? */ 145 bool caps_initialized; 146 /** @nr_caps: The length of the list caps. */ 147 u32 nr_caps; 148 /** 149 * @caps: Holds the contents of files read from 150 * <sysfs>/bus/event_source/devices/<name>/caps/. 151 * 152 * The contents are pairs of the filename with the value of its 153 * contents, for example, max_precise (see above) may have a value of 3. 154 */ 155 struct list_head caps; 156 /** @list: Element on pmus list in pmu.c. */ 157 struct list_head list; 158 159 /** 160 * @config_masks: Derived from the PMU's format data, bits that are 161 * valid within the config value. 162 */ 163 __u64 config_masks[PERF_PMU_FORMAT_VALUE_CONFIG_END]; 164 165 /** 166 * @missing_features: Features to inhibit when events on this PMU are 167 * opened. 168 */ 169 struct { 170 /** 171 * @exclude_guest: Disables perf_event_attr exclude_guest and 172 * exclude_host. 173 */ 174 bool exclude_guest; 175 /** 176 * @checked: Are the missing features checked? 177 */ 178 bool checked; 179 } missing_features; 180 181 /** 182 * @mem_events: List of the supported mem events 183 */ 184 struct perf_mem_event *mem_events; 185 }; 186 187 struct perf_pmu_info { 188 const char *unit; 189 double scale; 190 bool per_pkg; 191 bool snapshot; 192 }; 193 194 struct pmu_event_info { 195 const struct perf_pmu *pmu; 196 const char *name; 197 const char* alias; 198 const char *scale_unit; 199 const char *desc; 200 const char *long_desc; 201 const char *encoding_desc; 202 const char *topic; 203 const char *pmu_name; 204 const char *event_type_desc; 205 const char *str; 206 bool deprecated; 207 }; 208 209 typedef int (*pmu_event_callback)(void *state, struct pmu_event_info *info); 210 typedef int (*pmu_format_callback)(void *state, const char *name, int config, 211 const unsigned long *bits); 212 213 void pmu_add_sys_aliases(struct perf_pmu *pmu); 214 int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr, 215 struct parse_events_terms *head_terms, 216 bool apply_hardcoded, 217 struct parse_events_error *error); 218 int perf_pmu__config_terms(const struct perf_pmu *pmu, 219 struct perf_event_attr *attr, 220 struct parse_events_terms *terms, 221 bool zero, bool apply_hardcoded, 222 struct parse_events_error *error); 223 __u64 perf_pmu__format_bits(struct perf_pmu *pmu, const char *name); 224 int perf_pmu__format_type(struct perf_pmu *pmu, const char *name); 225 int perf_pmu__check_alias(struct perf_pmu *pmu, struct parse_events_terms *head_terms, 226 struct perf_pmu_info *info, bool *rewrote_terms, 227 u64 *alternate_hw_config, struct parse_events_error *err); 228 int perf_pmu__find_event(struct perf_pmu *pmu, const char *event, void *state, pmu_event_callback cb); 229 230 void perf_pmu_format__set_value(void *format, int config, unsigned long *bits); 231 bool perf_pmu__has_format(const struct perf_pmu *pmu, const char *name); 232 int perf_pmu__for_each_format(struct perf_pmu *pmu, void *state, pmu_format_callback cb); 233 234 bool is_pmu_core(const char *name); 235 bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu); 236 bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu); 237 bool perf_pmu__have_event(struct perf_pmu *pmu, const char *name); 238 size_t perf_pmu__num_events(struct perf_pmu *pmu); 239 int perf_pmu__for_each_event(struct perf_pmu *pmu, bool skip_duplicate_pmus, 240 void *state, pmu_event_callback cb); 241 bool pmu__name_match(const struct perf_pmu *pmu, const char *pmu_name); 242 243 /** 244 * perf_pmu_is_software - is the PMU a software PMU as in it uses the 245 * perf_sw_context in the kernel? 246 */ 247 bool perf_pmu__is_software(const struct perf_pmu *pmu); 248 249 FILE *perf_pmu__open_file(const struct perf_pmu *pmu, const char *name); 250 FILE *perf_pmu__open_file_at(const struct perf_pmu *pmu, int dirfd, const char *name); 251 252 int perf_pmu__scan_file(const struct perf_pmu *pmu, const char *name, const char *fmt, ...) 253 __scanf(3, 4); 254 int perf_pmu__scan_file_at(const struct perf_pmu *pmu, int dirfd, const char *name, 255 const char *fmt, ...) __scanf(4, 5); 256 257 bool perf_pmu__file_exists(const struct perf_pmu *pmu, const char *name); 258 259 int perf_pmu__test(void); 260 261 void perf_pmu__arch_init(struct perf_pmu *pmu); 262 void pmu_add_cpu_aliases_table(struct perf_pmu *pmu, 263 const struct pmu_events_table *table); 264 265 bool pmu_uncore_identifier_match(const char *compat, const char *id); 266 267 int perf_pmu__convert_scale(const char *scale, char **end, double *sval); 268 269 int perf_pmu__caps_parse(struct perf_pmu *pmu); 270 271 void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config, 272 const char *name, int config_num, 273 const char *config_name); 274 void perf_pmu__warn_invalid_formats(struct perf_pmu *pmu); 275 276 bool perf_pmu__match(const struct perf_pmu *pmu, const char *tok); 277 278 int perf_pmu__event_source_devices_scnprintf(char *pathname, size_t size); 279 int perf_pmu__pathname_scnprintf(char *buf, size_t size, 280 const char *pmu_name, const char *filename); 281 int perf_pmu__event_source_devices_fd(void); 282 int perf_pmu__pathname_fd(int dirfd, const char *pmu_name, const char *filename, int flags); 283 284 struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char *lookup_name, 285 bool eager_load); 286 struct perf_pmu *perf_pmu__create_placeholder_core_pmu(struct list_head *core_pmus); 287 void perf_pmu__delete(struct perf_pmu *pmu); 288 struct perf_pmu *perf_pmus__find_core_pmu(void); 289 290 const char *perf_pmu__name_from_config(struct perf_pmu *pmu, u64 config); 291 bool perf_pmu__is_fake(const struct perf_pmu *pmu); 292 293 #endif /* __PMU_H */ 294