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