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_fn( unsigned long, ip ) 65 __field_fn( unsigned long, parent_ip ) 66 ), 67 68 F_printk(" %ps <-- %ps", 69 (void *)__entry->ip, (void *)__entry->parent_ip), 70 71 perf_ftrace_event_register 72 ); 73 74 /* Function call entry */ 75 FTRACE_ENTRY_PACKED(funcgraph_entry, ftrace_graph_ent_entry, 76 77 TRACE_GRAPH_ENT, 78 79 F_STRUCT( 80 __field_struct( struct ftrace_graph_ent, graph_ent ) 81 __field_desc( unsigned long, graph_ent, func ) 82 __field_desc( int, graph_ent, depth ) 83 ), 84 85 F_printk("--> %ps (%d)", (void *)__entry->func, __entry->depth) 86 ); 87 88 /* Function return entry */ 89 FTRACE_ENTRY_PACKED(funcgraph_exit, ftrace_graph_ret_entry, 90 91 TRACE_GRAPH_RET, 92 93 F_STRUCT( 94 __field_struct( struct ftrace_graph_ret, ret ) 95 __field_desc( unsigned long, ret, func ) 96 __field_desc( unsigned long, ret, overrun ) 97 __field_desc( unsigned long long, ret, calltime) 98 __field_desc( unsigned long long, ret, rettime ) 99 __field_desc( int, ret, depth ) 100 ), 101 102 F_printk("<-- %ps (%d) (start: %llx end: %llx) over: %d", 103 (void *)__entry->func, __entry->depth, 104 __entry->calltime, __entry->rettime, 105 __entry->depth) 106 ); 107 108 /* 109 * Context switch trace entry - which task (and prio) we switched from/to: 110 * 111 * This is used for both wakeup and context switches. We only want 112 * to create one structure, but we need two outputs for it. 113 */ 114 #define FTRACE_CTX_FIELDS \ 115 __field( unsigned int, prev_pid ) \ 116 __field( unsigned int, next_pid ) \ 117 __field( unsigned int, next_cpu ) \ 118 __field( unsigned char, prev_prio ) \ 119 __field( unsigned char, prev_state ) \ 120 __field( unsigned char, next_prio ) \ 121 __field( unsigned char, next_state ) 122 123 FTRACE_ENTRY(context_switch, ctx_switch_entry, 124 125 TRACE_CTX, 126 127 F_STRUCT( 128 FTRACE_CTX_FIELDS 129 ), 130 131 F_printk("%u:%u:%u ==> %u:%u:%u [%03u]", 132 __entry->prev_pid, __entry->prev_prio, __entry->prev_state, 133 __entry->next_pid, __entry->next_prio, __entry->next_state, 134 __entry->next_cpu) 135 ); 136 137 /* 138 * FTRACE_ENTRY_DUP only creates the format file, it will not 139 * create another structure. 140 */ 141 FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry, 142 143 TRACE_WAKE, 144 145 F_STRUCT( 146 FTRACE_CTX_FIELDS 147 ), 148 149 F_printk("%u:%u:%u ==+ %u:%u:%u [%03u]", 150 __entry->prev_pid, __entry->prev_prio, __entry->prev_state, 151 __entry->next_pid, __entry->next_prio, __entry->next_state, 152 __entry->next_cpu) 153 ); 154 155 /* 156 * Stack-trace entry: 157 */ 158 159 #define FTRACE_STACK_ENTRIES 8 160 161 FTRACE_ENTRY(kernel_stack, stack_entry, 162 163 TRACE_STACK, 164 165 F_STRUCT( 166 __field( int, size ) 167 __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) 168 ), 169 170 F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n" 171 "\t=> %ps\n\t=> %ps\n\t=> %ps\n" 172 "\t=> %ps\n\t=> %ps\n", 173 (void *)__entry->caller[0], (void *)__entry->caller[1], 174 (void *)__entry->caller[2], (void *)__entry->caller[3], 175 (void *)__entry->caller[4], (void *)__entry->caller[5], 176 (void *)__entry->caller[6], (void *)__entry->caller[7]) 177 ); 178 179 FTRACE_ENTRY(user_stack, userstack_entry, 180 181 TRACE_USER_STACK, 182 183 F_STRUCT( 184 __field( unsigned int, tgid ) 185 __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) 186 ), 187 188 F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n" 189 "\t=> %ps\n\t=> %ps\n\t=> %ps\n" 190 "\t=> %ps\n\t=> %ps\n", 191 (void *)__entry->caller[0], (void *)__entry->caller[1], 192 (void *)__entry->caller[2], (void *)__entry->caller[3], 193 (void *)__entry->caller[4], (void *)__entry->caller[5], 194 (void *)__entry->caller[6], (void *)__entry->caller[7]) 195 ); 196 197 /* 198 * trace_printk entry: 199 */ 200 FTRACE_ENTRY(bprint, bprint_entry, 201 202 TRACE_BPRINT, 203 204 F_STRUCT( 205 __field( unsigned long, ip ) 206 __field( const char *, fmt ) 207 __dynamic_array( u32, buf ) 208 ), 209 210 F_printk("%ps: %s", 211 (void *)__entry->ip, __entry->fmt) 212 ); 213 214 FTRACE_ENTRY_REG(print, print_entry, 215 216 TRACE_PRINT, 217 218 F_STRUCT( 219 __field( unsigned long, ip ) 220 __dynamic_array( char, buf ) 221 ), 222 223 F_printk("%ps: %s", 224 (void *)__entry->ip, __entry->buf), 225 226 ftrace_event_register 227 ); 228 229 FTRACE_ENTRY(raw_data, raw_data_entry, 230 231 TRACE_RAW_DATA, 232 233 F_STRUCT( 234 __field( unsigned int, id ) 235 __dynamic_array( char, buf ) 236 ), 237 238 F_printk("id:%04x %08x", 239 __entry->id, (int)__entry->buf[0]) 240 ); 241 242 FTRACE_ENTRY(bputs, bputs_entry, 243 244 TRACE_BPUTS, 245 246 F_STRUCT( 247 __field( unsigned long, ip ) 248 __field( const char *, str ) 249 ), 250 251 F_printk("%ps: %s", 252 (void *)__entry->ip, __entry->str) 253 ); 254 255 FTRACE_ENTRY(mmiotrace_rw, trace_mmiotrace_rw, 256 257 TRACE_MMIO_RW, 258 259 F_STRUCT( 260 __field_struct( struct mmiotrace_rw, rw ) 261 __field_desc( resource_size_t, rw, phys ) 262 __field_desc( unsigned long, rw, value ) 263 __field_desc( unsigned long, rw, pc ) 264 __field_desc( int, rw, map_id ) 265 __field_desc( unsigned char, rw, opcode ) 266 __field_desc( unsigned char, rw, width ) 267 ), 268 269 F_printk("%lx %lx %lx %d %x %x", 270 (unsigned long)__entry->phys, __entry->value, __entry->pc, 271 __entry->map_id, __entry->opcode, __entry->width) 272 ); 273 274 FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map, 275 276 TRACE_MMIO_MAP, 277 278 F_STRUCT( 279 __field_struct( struct mmiotrace_map, map ) 280 __field_desc( resource_size_t, map, phys ) 281 __field_desc( unsigned long, map, virt ) 282 __field_desc( unsigned long, map, len ) 283 __field_desc( int, map, map_id ) 284 __field_desc( unsigned char, map, opcode ) 285 ), 286 287 F_printk("%lx %lx %lx %d %x", 288 (unsigned long)__entry->phys, __entry->virt, __entry->len, 289 __entry->map_id, __entry->opcode) 290 ); 291 292 293 #define TRACE_FUNC_SIZE 30 294 #define TRACE_FILE_SIZE 20 295 296 FTRACE_ENTRY(branch, trace_branch, 297 298 TRACE_BRANCH, 299 300 F_STRUCT( 301 __field( unsigned int, line ) 302 __array( char, func, TRACE_FUNC_SIZE+1 ) 303 __array( char, file, TRACE_FILE_SIZE+1 ) 304 __field( char, correct ) 305 __field( char, constant ) 306 ), 307 308 F_printk("%u:%s:%s (%u)%s", 309 __entry->line, 310 __entry->func, __entry->file, __entry->correct, 311 __entry->constant ? " CONSTANT" : "") 312 ); 313 314 315 FTRACE_ENTRY(hwlat, hwlat_entry, 316 317 TRACE_HWLAT, 318 319 F_STRUCT( 320 __field( u64, duration ) 321 __field( u64, outer_duration ) 322 __field( u64, nmi_total_ts ) 323 __field_struct( struct timespec64, timestamp ) 324 __field_desc( s64, timestamp, tv_sec ) 325 __field_desc( long, timestamp, tv_nsec ) 326 __field( unsigned int, nmi_count ) 327 __field( unsigned int, seqnum ) 328 ), 329 330 F_printk("cnt:%u\tts:%010llu.%010lu\tinner:%llu\touter:%llu\tnmi-ts:%llu\tnmi-count:%u\n", 331 __entry->seqnum, 332 __entry->tv_sec, 333 __entry->tv_nsec, 334 __entry->duration, 335 __entry->outer_duration, 336 __entry->nmi_total_ts, 337 __entry->nmi_count) 338 ); 339