1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * This file defines the trace event structures that go into the ring 4 * buffer directly. They are created via macros so that changes for them 5 * appear in the format file. Using macros will automate this process. 6 * 7 * The macro used to create a ftrace data structure is: 8 * 9 * FTRACE_ENTRY( name, struct_name, id, structure, print ) 10 * 11 * @name: the name used the event name, as well as the name of 12 * the directory that holds the format file. 13 * 14 * @struct_name: the name of the structure that is created. 15 * 16 * @id: The event identifier that is used to detect what event 17 * this is from the ring buffer. 18 * 19 * @structure: the structure layout 20 * 21 * - __field( type, item ) 22 * This is equivalent to declaring 23 * type item; 24 * in the structure. 25 * - __array( type, item, size ) 26 * This is equivalent to declaring 27 * type item[size]; 28 * in the structure. 29 * 30 * * for structures within structures, the format of the internal 31 * structure is laid out. This allows the internal structure 32 * to be deciphered for the format file. Although these macros 33 * may become out of sync with the internal structure, they 34 * will create a compile error if it happens. Since the 35 * internel structures are just tracing helpers, this is not 36 * an issue. 37 * 38 * When an internal structure is used, it should use: 39 * 40 * __field_struct( type, item ) 41 * 42 * instead of __field. This will prevent it from being shown in 43 * the output file. The fields in the structure should use. 44 * 45 * __field_desc( type, container, item ) 46 * __array_desc( type, container, item, len ) 47 * 48 * type, item and len are the same as __field and __array, but 49 * container is added. This is the name of the item in 50 * __field_struct that this is describing. 51 * 52 * 53 * @print: the print format shown to users in the format file. 54 */ 55 56 /* 57 * Function trace entry - function address and parent function address: 58 */ 59 FTRACE_ENTRY_REG(function, ftrace_entry, 60 61 TRACE_FN, 62 63 F_STRUCT( 64 __field( unsigned long, ip ) 65 __field( unsigned long, parent_ip ) 66 ), 67 68 F_printk(" %lx <-- %lx", __entry->ip, __entry->parent_ip), 69 70 FILTER_TRACE_FN, 71 72 perf_ftrace_event_register 73 ); 74 75 /* Function call entry */ 76 FTRACE_ENTRY_PACKED(funcgraph_entry, ftrace_graph_ent_entry, 77 78 TRACE_GRAPH_ENT, 79 80 F_STRUCT( 81 __field_struct( struct ftrace_graph_ent, graph_ent ) 82 __field_desc( unsigned long, graph_ent, func ) 83 __field_desc( int, graph_ent, depth ) 84 ), 85 86 F_printk("--> %lx (%d)", __entry->func, __entry->depth), 87 88 FILTER_OTHER 89 ); 90 91 /* Function return entry */ 92 FTRACE_ENTRY_PACKED(funcgraph_exit, ftrace_graph_ret_entry, 93 94 TRACE_GRAPH_RET, 95 96 F_STRUCT( 97 __field_struct( struct ftrace_graph_ret, ret ) 98 __field_desc( unsigned long, ret, func ) 99 __field_desc( unsigned long long, ret, calltime) 100 __field_desc( unsigned long long, ret, rettime ) 101 __field_desc( unsigned long, ret, overrun ) 102 __field_desc( int, ret, depth ) 103 ), 104 105 F_printk("<-- %lx (%d) (start: %llx end: %llx) over: %d", 106 __entry->func, __entry->depth, 107 __entry->calltime, __entry->rettime, 108 __entry->depth), 109 110 FILTER_OTHER 111 ); 112 113 /* 114 * Context switch trace entry - which task (and prio) we switched from/to: 115 * 116 * This is used for both wakeup and context switches. We only want 117 * to create one structure, but we need two outputs for it. 118 */ 119 #define FTRACE_CTX_FIELDS \ 120 __field( unsigned int, prev_pid ) \ 121 __field( unsigned int, next_pid ) \ 122 __field( unsigned int, next_cpu ) \ 123 __field( unsigned char, prev_prio ) \ 124 __field( unsigned char, prev_state ) \ 125 __field( unsigned char, next_prio ) \ 126 __field( unsigned char, next_state ) 127 128 FTRACE_ENTRY(context_switch, ctx_switch_entry, 129 130 TRACE_CTX, 131 132 F_STRUCT( 133 FTRACE_CTX_FIELDS 134 ), 135 136 F_printk("%u:%u:%u ==> %u:%u:%u [%03u]", 137 __entry->prev_pid, __entry->prev_prio, __entry->prev_state, 138 __entry->next_pid, __entry->next_prio, __entry->next_state, 139 __entry->next_cpu), 140 141 FILTER_OTHER 142 ); 143 144 /* 145 * FTRACE_ENTRY_DUP only creates the format file, it will not 146 * create another structure. 147 */ 148 FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry, 149 150 TRACE_WAKE, 151 152 F_STRUCT( 153 FTRACE_CTX_FIELDS 154 ), 155 156 F_printk("%u:%u:%u ==+ %u:%u:%u [%03u]", 157 __entry->prev_pid, __entry->prev_prio, __entry->prev_state, 158 __entry->next_pid, __entry->next_prio, __entry->next_state, 159 __entry->next_cpu), 160 161 FILTER_OTHER 162 ); 163 164 /* 165 * Stack-trace entry: 166 */ 167 168 #define FTRACE_STACK_ENTRIES 8 169 170 #ifndef CONFIG_64BIT 171 # define IP_FMT "%08lx" 172 #else 173 # define IP_FMT "%016lx" 174 #endif 175 176 FTRACE_ENTRY(kernel_stack, stack_entry, 177 178 TRACE_STACK, 179 180 F_STRUCT( 181 __field( int, size ) 182 __dynamic_array(unsigned long, caller ) 183 ), 184 185 F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" 186 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" 187 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n", 188 __entry->caller[0], __entry->caller[1], __entry->caller[2], 189 __entry->caller[3], __entry->caller[4], __entry->caller[5], 190 __entry->caller[6], __entry->caller[7]), 191 192 FILTER_OTHER 193 ); 194 195 FTRACE_ENTRY(user_stack, userstack_entry, 196 197 TRACE_USER_STACK, 198 199 F_STRUCT( 200 __field( unsigned int, tgid ) 201 __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) 202 ), 203 204 F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" 205 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" 206 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n", 207 __entry->caller[0], __entry->caller[1], __entry->caller[2], 208 __entry->caller[3], __entry->caller[4], __entry->caller[5], 209 __entry->caller[6], __entry->caller[7]), 210 211 FILTER_OTHER 212 ); 213 214 /* 215 * trace_printk entry: 216 */ 217 FTRACE_ENTRY(bprint, bprint_entry, 218 219 TRACE_BPRINT, 220 221 F_STRUCT( 222 __field( unsigned long, ip ) 223 __field( const char *, fmt ) 224 __dynamic_array( u32, buf ) 225 ), 226 227 F_printk("%ps: %s", 228 (void *)__entry->ip, __entry->fmt), 229 230 FILTER_OTHER 231 ); 232 233 FTRACE_ENTRY_REG(print, print_entry, 234 235 TRACE_PRINT, 236 237 F_STRUCT( 238 __field( unsigned long, ip ) 239 __dynamic_array( char, buf ) 240 ), 241 242 F_printk("%ps: %s", 243 (void *)__entry->ip, __entry->buf), 244 245 FILTER_OTHER, 246 247 ftrace_event_register 248 ); 249 250 FTRACE_ENTRY(raw_data, raw_data_entry, 251 252 TRACE_RAW_DATA, 253 254 F_STRUCT( 255 __field( unsigned int, id ) 256 __dynamic_array( char, buf ) 257 ), 258 259 F_printk("id:%04x %08x", 260 __entry->id, (int)__entry->buf[0]), 261 262 FILTER_OTHER 263 ); 264 265 FTRACE_ENTRY(bputs, bputs_entry, 266 267 TRACE_BPUTS, 268 269 F_STRUCT( 270 __field( unsigned long, ip ) 271 __field( const char *, str ) 272 ), 273 274 F_printk("%ps: %s", 275 (void *)__entry->ip, __entry->str), 276 277 FILTER_OTHER 278 ); 279 280 FTRACE_ENTRY(mmiotrace_rw, trace_mmiotrace_rw, 281 282 TRACE_MMIO_RW, 283 284 F_STRUCT( 285 __field_struct( struct mmiotrace_rw, rw ) 286 __field_desc( resource_size_t, rw, phys ) 287 __field_desc( unsigned long, rw, value ) 288 __field_desc( unsigned long, rw, pc ) 289 __field_desc( int, rw, map_id ) 290 __field_desc( unsigned char, rw, opcode ) 291 __field_desc( unsigned char, rw, width ) 292 ), 293 294 F_printk("%lx %lx %lx %d %x %x", 295 (unsigned long)__entry->phys, __entry->value, __entry->pc, 296 __entry->map_id, __entry->opcode, __entry->width), 297 298 FILTER_OTHER 299 ); 300 301 FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map, 302 303 TRACE_MMIO_MAP, 304 305 F_STRUCT( 306 __field_struct( struct mmiotrace_map, map ) 307 __field_desc( resource_size_t, map, phys ) 308 __field_desc( unsigned long, map, virt ) 309 __field_desc( unsigned long, map, len ) 310 __field_desc( int, map, map_id ) 311 __field_desc( unsigned char, map, opcode ) 312 ), 313 314 F_printk("%lx %lx %lx %d %x", 315 (unsigned long)__entry->phys, __entry->virt, __entry->len, 316 __entry->map_id, __entry->opcode), 317 318 FILTER_OTHER 319 ); 320 321 322 #define TRACE_FUNC_SIZE 30 323 #define TRACE_FILE_SIZE 20 324 325 FTRACE_ENTRY(branch, trace_branch, 326 327 TRACE_BRANCH, 328 329 F_STRUCT( 330 __field( unsigned int, line ) 331 __array( char, func, TRACE_FUNC_SIZE+1 ) 332 __array( char, file, TRACE_FILE_SIZE+1 ) 333 __field( char, correct ) 334 __field( char, constant ) 335 ), 336 337 F_printk("%u:%s:%s (%u)%s", 338 __entry->line, 339 __entry->func, __entry->file, __entry->correct, 340 __entry->constant ? " CONSTANT" : ""), 341 342 FILTER_OTHER 343 ); 344 345 346 FTRACE_ENTRY(hwlat, hwlat_entry, 347 348 TRACE_HWLAT, 349 350 F_STRUCT( 351 __field( u64, duration ) 352 __field( u64, outer_duration ) 353 __field( u64, nmi_total_ts ) 354 __field_struct( struct timespec64, timestamp ) 355 __field_desc( s64, timestamp, tv_sec ) 356 __field_desc( long, timestamp, tv_nsec ) 357 __field( unsigned int, nmi_count ) 358 __field( unsigned int, seqnum ) 359 ), 360 361 F_printk("cnt:%u\tts:%010llu.%010lu\tinner:%llu\touter:%llu\tnmi-ts:%llu\tnmi-count:%u\n", 362 __entry->seqnum, 363 __entry->tv_sec, 364 __entry->tv_nsec, 365 __entry->duration, 366 __entry->outer_duration, 367 __entry->nmi_total_ts, 368 __entry->nmi_count), 369 370 FILTER_OTHER 371 ); 372