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