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(" %ps <-- %ps", 69 (void *)__entry->ip, (void *)__entry->parent_ip), 70 71 FILTER_TRACE_FN, 72 73 perf_ftrace_event_register 74 ); 75 76 /* Function call entry */ 77 FTRACE_ENTRY_PACKED(funcgraph_entry, ftrace_graph_ent_entry, 78 79 TRACE_GRAPH_ENT, 80 81 F_STRUCT( 82 __field_struct( struct ftrace_graph_ent, graph_ent ) 83 __field_desc( unsigned long, graph_ent, func ) 84 __field_desc( int, graph_ent, depth ) 85 ), 86 87 F_printk("--> %ps (%d)", (void *)__entry->func, __entry->depth), 88 89 FILTER_OTHER 90 ); 91 92 /* Function return entry */ 93 FTRACE_ENTRY_PACKED(funcgraph_exit, ftrace_graph_ret_entry, 94 95 TRACE_GRAPH_RET, 96 97 F_STRUCT( 98 __field_struct( struct ftrace_graph_ret, ret ) 99 __field_desc( unsigned long, ret, func ) 100 __field_desc( unsigned long long, ret, calltime) 101 __field_desc( unsigned long long, ret, rettime ) 102 __field_desc( unsigned long, ret, overrun ) 103 __field_desc( int, ret, depth ) 104 ), 105 106 F_printk("<-- %ps (%d) (start: %llx end: %llx) over: %d", 107 (void *)__entry->func, __entry->depth, 108 __entry->calltime, __entry->rettime, 109 __entry->depth), 110 111 FILTER_OTHER 112 ); 113 114 /* 115 * Context switch trace entry - which task (and prio) we switched from/to: 116 * 117 * This is used for both wakeup and context switches. We only want 118 * to create one structure, but we need two outputs for it. 119 */ 120 #define FTRACE_CTX_FIELDS \ 121 __field( unsigned int, prev_pid ) \ 122 __field( unsigned int, next_pid ) \ 123 __field( unsigned int, next_cpu ) \ 124 __field( unsigned char, prev_prio ) \ 125 __field( unsigned char, prev_state ) \ 126 __field( unsigned char, next_prio ) \ 127 __field( unsigned char, next_state ) 128 129 FTRACE_ENTRY(context_switch, ctx_switch_entry, 130 131 TRACE_CTX, 132 133 F_STRUCT( 134 FTRACE_CTX_FIELDS 135 ), 136 137 F_printk("%u:%u:%u ==> %u:%u:%u [%03u]", 138 __entry->prev_pid, __entry->prev_prio, __entry->prev_state, 139 __entry->next_pid, __entry->next_prio, __entry->next_state, 140 __entry->next_cpu), 141 142 FILTER_OTHER 143 ); 144 145 /* 146 * FTRACE_ENTRY_DUP only creates the format file, it will not 147 * create another structure. 148 */ 149 FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry, 150 151 TRACE_WAKE, 152 153 F_STRUCT( 154 FTRACE_CTX_FIELDS 155 ), 156 157 F_printk("%u:%u:%u ==+ %u:%u:%u [%03u]", 158 __entry->prev_pid, __entry->prev_prio, __entry->prev_state, 159 __entry->next_pid, __entry->next_prio, __entry->next_state, 160 __entry->next_cpu), 161 162 FILTER_OTHER 163 ); 164 165 /* 166 * Stack-trace entry: 167 */ 168 169 #define FTRACE_STACK_ENTRIES 8 170 171 FTRACE_ENTRY(kernel_stack, stack_entry, 172 173 TRACE_STACK, 174 175 F_STRUCT( 176 __field( int, size ) 177 __dynamic_array(unsigned long, caller ) 178 ), 179 180 F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n" 181 "\t=> %ps\n\t=> %ps\n\t=> %ps\n" 182 "\t=> %ps\n\t=> %ps\n", 183 (void *)__entry->caller[0], (void *)__entry->caller[1], 184 (void *)__entry->caller[2], (void *)__entry->caller[3], 185 (void *)__entry->caller[4], (void *)__entry->caller[5], 186 (void *)__entry->caller[6], (void *)__entry->caller[7]), 187 188 FILTER_OTHER 189 ); 190 191 FTRACE_ENTRY(user_stack, userstack_entry, 192 193 TRACE_USER_STACK, 194 195 F_STRUCT( 196 __field( unsigned int, tgid ) 197 __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) 198 ), 199 200 F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n" 201 "\t=> %ps\n\t=> %ps\n\t=> %ps\n" 202 "\t=> %ps\n\t=> %ps\n", 203 (void *)__entry->caller[0], (void *)__entry->caller[1], 204 (void *)__entry->caller[2], (void *)__entry->caller[3], 205 (void *)__entry->caller[4], (void *)__entry->caller[5], 206 (void *)__entry->caller[6], (void *)__entry->caller[7]), 207 208 FILTER_OTHER 209 ); 210 211 /* 212 * trace_printk entry: 213 */ 214 FTRACE_ENTRY(bprint, bprint_entry, 215 216 TRACE_BPRINT, 217 218 F_STRUCT( 219 __field( unsigned long, ip ) 220 __field( const char *, fmt ) 221 __dynamic_array( u32, buf ) 222 ), 223 224 F_printk("%ps: %s", 225 (void *)__entry->ip, __entry->fmt), 226 227 FILTER_OTHER 228 ); 229 230 FTRACE_ENTRY_REG(print, print_entry, 231 232 TRACE_PRINT, 233 234 F_STRUCT( 235 __field( unsigned long, ip ) 236 __dynamic_array( char, buf ) 237 ), 238 239 F_printk("%ps: %s", 240 (void *)__entry->ip, __entry->buf), 241 242 FILTER_OTHER, 243 244 ftrace_event_register 245 ); 246 247 FTRACE_ENTRY(raw_data, raw_data_entry, 248 249 TRACE_RAW_DATA, 250 251 F_STRUCT( 252 __field( unsigned int, id ) 253 __dynamic_array( char, buf ) 254 ), 255 256 F_printk("id:%04x %08x", 257 __entry->id, (int)__entry->buf[0]), 258 259 FILTER_OTHER 260 ); 261 262 FTRACE_ENTRY(bputs, bputs_entry, 263 264 TRACE_BPUTS, 265 266 F_STRUCT( 267 __field( unsigned long, ip ) 268 __field( const char *, str ) 269 ), 270 271 F_printk("%ps: %s", 272 (void *)__entry->ip, __entry->str), 273 274 FILTER_OTHER 275 ); 276 277 FTRACE_ENTRY(mmiotrace_rw, trace_mmiotrace_rw, 278 279 TRACE_MMIO_RW, 280 281 F_STRUCT( 282 __field_struct( struct mmiotrace_rw, rw ) 283 __field_desc( resource_size_t, rw, phys ) 284 __field_desc( unsigned long, rw, value ) 285 __field_desc( unsigned long, rw, pc ) 286 __field_desc( int, rw, map_id ) 287 __field_desc( unsigned char, rw, opcode ) 288 __field_desc( unsigned char, rw, width ) 289 ), 290 291 F_printk("%lx %lx %lx %d %x %x", 292 (unsigned long)__entry->phys, __entry->value, __entry->pc, 293 __entry->map_id, __entry->opcode, __entry->width), 294 295 FILTER_OTHER 296 ); 297 298 FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map, 299 300 TRACE_MMIO_MAP, 301 302 F_STRUCT( 303 __field_struct( struct mmiotrace_map, map ) 304 __field_desc( resource_size_t, map, phys ) 305 __field_desc( unsigned long, map, virt ) 306 __field_desc( unsigned long, map, len ) 307 __field_desc( int, map, map_id ) 308 __field_desc( unsigned char, map, opcode ) 309 ), 310 311 F_printk("%lx %lx %lx %d %x", 312 (unsigned long)__entry->phys, __entry->virt, __entry->len, 313 __entry->map_id, __entry->opcode), 314 315 FILTER_OTHER 316 ); 317 318 319 #define TRACE_FUNC_SIZE 30 320 #define TRACE_FILE_SIZE 20 321 322 FTRACE_ENTRY(branch, trace_branch, 323 324 TRACE_BRANCH, 325 326 F_STRUCT( 327 __field( unsigned int, line ) 328 __array( char, func, TRACE_FUNC_SIZE+1 ) 329 __array( char, file, TRACE_FILE_SIZE+1 ) 330 __field( char, correct ) 331 __field( char, constant ) 332 ), 333 334 F_printk("%u:%s:%s (%u)%s", 335 __entry->line, 336 __entry->func, __entry->file, __entry->correct, 337 __entry->constant ? " CONSTANT" : ""), 338 339 FILTER_OTHER 340 ); 341 342 343 FTRACE_ENTRY(hwlat, hwlat_entry, 344 345 TRACE_HWLAT, 346 347 F_STRUCT( 348 __field( u64, duration ) 349 __field( u64, outer_duration ) 350 __field( u64, nmi_total_ts ) 351 __field_struct( struct timespec64, timestamp ) 352 __field_desc( s64, timestamp, tv_sec ) 353 __field_desc( long, timestamp, tv_nsec ) 354 __field( unsigned int, nmi_count ) 355 __field( unsigned int, seqnum ) 356 ), 357 358 F_printk("cnt:%u\tts:%010llu.%010lu\tinner:%llu\touter:%llu\tnmi-ts:%llu\tnmi-count:%u\n", 359 __entry->seqnum, 360 __entry->tv_sec, 361 __entry->tv_nsec, 362 __entry->duration, 363 __entry->outer_duration, 364 __entry->nmi_total_ts, 365 __entry->nmi_count), 366 367 FILTER_OTHER 368 ); 369