| 1 | /* |
| 2 | * Performance counters: |
| 3 | * |
| 4 | * Copyright(C) 2008, Thomas Gleixner <tglx@linutronix.de> |
| 5 | * Copyright(C) 2008, Red Hat, Inc., Ingo Molnar |
| 6 | * |
| 7 | * Data type definitions, declarations, prototypes. |
| 8 | * |
| 9 | * Started by: Thomas Gleixner and Ingo Molnar |
| 10 | * |
| 11 | * For licencing details see kernel-base/COPYING |
| 12 | */ |
| 13 | #ifndef _LINUX_PERF_COUNTER_H |
| 14 | #define _LINUX_PERF_COUNTER_H |
| 15 | |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/ioctl.h> |
| 18 | #include <asm/byteorder.h> |
| 19 | |
| 20 | /* |
| 21 | * User-space ABI bits: |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * hw_event.type |
| 26 | */ |
| 27 | enum perf_event_types { |
| 28 | PERF_TYPE_HARDWARE = 0, |
| 29 | PERF_TYPE_SOFTWARE = 1, |
| 30 | PERF_TYPE_TRACEPOINT = 2, |
| 31 | |
| 32 | /* |
| 33 | * available TYPE space, raw is the max value. |
| 34 | */ |
| 35 | |
| 36 | PERF_TYPE_RAW = 128, |
| 37 | }; |
| 38 | |
| 39 | /* |
| 40 | * Generalized performance counter event types, used by the hw_event.event_id |
| 41 | * parameter of the sys_perf_counter_open() syscall: |
| 42 | */ |
| 43 | enum hw_event_ids { |
| 44 | /* |
| 45 | * Common hardware events, generalized by the kernel: |
| 46 | */ |
| 47 | PERF_COUNT_CPU_CYCLES = 0, |
| 48 | PERF_COUNT_INSTRUCTIONS = 1, |
| 49 | PERF_COUNT_CACHE_REFERENCES = 2, |
| 50 | PERF_COUNT_CACHE_MISSES = 3, |
| 51 | PERF_COUNT_BRANCH_INSTRUCTIONS = 4, |
| 52 | PERF_COUNT_BRANCH_MISSES = 5, |
| 53 | PERF_COUNT_BUS_CYCLES = 6, |
| 54 | |
| 55 | PERF_HW_EVENTS_MAX = 7, |
| 56 | }; |
| 57 | |
| 58 | /* |
| 59 | * Special "software" counters provided by the kernel, even if the hardware |
| 60 | * does not support performance counters. These counters measure various |
| 61 | * physical and sw events of the kernel (and allow the profiling of them as |
| 62 | * well): |
| 63 | */ |
| 64 | enum sw_event_ids { |
| 65 | PERF_COUNT_CPU_CLOCK = 0, |
| 66 | PERF_COUNT_TASK_CLOCK = 1, |
| 67 | PERF_COUNT_PAGE_FAULTS = 2, |
| 68 | PERF_COUNT_CONTEXT_SWITCHES = 3, |
| 69 | PERF_COUNT_CPU_MIGRATIONS = 4, |
| 70 | PERF_COUNT_PAGE_FAULTS_MIN = 5, |
| 71 | PERF_COUNT_PAGE_FAULTS_MAJ = 6, |
| 72 | |
| 73 | PERF_SW_EVENTS_MAX = 7, |
| 74 | }; |
| 75 | |
| 76 | #define __PERF_COUNTER_MASK(name) \ |
| 77 | (((1ULL << PERF_COUNTER_##name##_BITS) - 1) << \ |
| 78 | PERF_COUNTER_##name##_SHIFT) |
| 79 | |
| 80 | #define PERF_COUNTER_RAW_BITS 1 |
| 81 | #define PERF_COUNTER_RAW_SHIFT 63 |
| 82 | #define PERF_COUNTER_RAW_MASK __PERF_COUNTER_MASK(RAW) |
| 83 | |
| 84 | #define PERF_COUNTER_CONFIG_BITS 63 |
| 85 | #define PERF_COUNTER_CONFIG_SHIFT 0 |
| 86 | #define PERF_COUNTER_CONFIG_MASK __PERF_COUNTER_MASK(CONFIG) |
| 87 | |
| 88 | #define PERF_COUNTER_TYPE_BITS 7 |
| 89 | #define PERF_COUNTER_TYPE_SHIFT 56 |
| 90 | #define PERF_COUNTER_TYPE_MASK __PERF_COUNTER_MASK(TYPE) |
| 91 | |
| 92 | #define PERF_COUNTER_EVENT_BITS 56 |
| 93 | #define PERF_COUNTER_EVENT_SHIFT 0 |
| 94 | #define PERF_COUNTER_EVENT_MASK __PERF_COUNTER_MASK(EVENT) |
| 95 | |
| 96 | /* |
| 97 | * Bits that can be set in hw_event.record_type to request information |
| 98 | * in the overflow packets. |
| 99 | */ |
| 100 | enum perf_counter_record_format { |
| 101 | PERF_RECORD_IP = 1U << 0, |
| 102 | PERF_RECORD_TID = 1U << 1, |
| 103 | PERF_RECORD_TIME = 1U << 2, |
| 104 | PERF_RECORD_ADDR = 1U << 3, |
| 105 | PERF_RECORD_GROUP = 1U << 4, |
| 106 | PERF_RECORD_CALLCHAIN = 1U << 5, |
| 107 | }; |
| 108 | |
| 109 | /* |
| 110 | * Bits that can be set in hw_event.read_format to request that |
| 111 | * reads on the counter should return the indicated quantities, |
| 112 | * in increasing order of bit value, after the counter value. |
| 113 | */ |
| 114 | enum perf_counter_read_format { |
| 115 | PERF_FORMAT_TOTAL_TIME_ENABLED = 1, |
| 116 | PERF_FORMAT_TOTAL_TIME_RUNNING = 2, |
| 117 | }; |
| 118 | |
| 119 | /* |
| 120 | * Hardware event to monitor via a performance monitoring counter: |
| 121 | */ |
| 122 | struct perf_counter_hw_event { |
| 123 | /* |
| 124 | * The MSB of the config word signifies if the rest contains cpu |
| 125 | * specific (raw) counter configuration data, if unset, the next |
| 126 | * 7 bits are an event type and the rest of the bits are the event |
| 127 | * identifier. |
| 128 | */ |
| 129 | __u64 config; |
| 130 | |
| 131 | __u64 irq_period; |
| 132 | __u32 record_type; |
| 133 | __u32 read_format; |
| 134 | |
| 135 | __u64 disabled : 1, /* off by default */ |
| 136 | nmi : 1, /* NMI sampling */ |
| 137 | inherit : 1, /* children inherit it */ |
| 138 | pinned : 1, /* must always be on PMU */ |
| 139 | exclusive : 1, /* only group on PMU */ |
| 140 | exclude_user : 1, /* don't count user */ |
| 141 | exclude_kernel : 1, /* ditto kernel */ |
| 142 | exclude_hv : 1, /* ditto hypervisor */ |
| 143 | exclude_idle : 1, /* don't count when idle */ |
| 144 | mmap : 1, /* include mmap data */ |
| 145 | munmap : 1, /* include munmap data */ |
| 146 | comm : 1, /* include comm data */ |
| 147 | |
| 148 | __reserved_1 : 52; |
| 149 | |
| 150 | __u32 extra_config_len; |
| 151 | __u32 wakeup_events; /* wakeup every n events */ |
| 152 | |
| 153 | __u64 __reserved_2; |
| 154 | __u64 __reserved_3; |
| 155 | }; |
| 156 | |
| 157 | /* |
| 158 | * Ioctls that can be done on a perf counter fd: |
| 159 | */ |
| 160 | #define PERF_COUNTER_IOC_ENABLE _IO ('$', 0) |
| 161 | #define PERF_COUNTER_IOC_DISABLE _IO ('$', 1) |
| 162 | #define PERF_COUNTER_IOC_REFRESH _IOW('$', 2, u32) |
| 163 | |
| 164 | /* |
| 165 | * Structure of the page that can be mapped via mmap |
| 166 | */ |
| 167 | struct perf_counter_mmap_page { |
| 168 | __u32 version; /* version number of this structure */ |
| 169 | __u32 compat_version; /* lowest version this is compat with */ |
| 170 | |
| 171 | /* |
| 172 | * Bits needed to read the hw counters in user-space. |
| 173 | * |
| 174 | * u32 seq; |
| 175 | * s64 count; |
| 176 | * |
| 177 | * do { |
| 178 | * seq = pc->lock; |
| 179 | * |
| 180 | * barrier() |
| 181 | * if (pc->index) { |
| 182 | * count = pmc_read(pc->index - 1); |
| 183 | * count += pc->offset; |
| 184 | * } else |
| 185 | * goto regular_read; |
| 186 | * |
| 187 | * barrier(); |
| 188 | * } while (pc->lock != seq); |
| 189 | * |
| 190 | * NOTE: for obvious reason this only works on self-monitoring |
| 191 | * processes. |
| 192 | */ |
| 193 | __u32 lock; /* seqlock for synchronization */ |
| 194 | __u32 index; /* hardware counter identifier */ |
| 195 | __s64 offset; /* add to hardware counter value */ |
| 196 | |
| 197 | /* |
| 198 | * Control data for the mmap() data buffer. |
| 199 | * |
| 200 | * User-space reading this value should issue an rmb(), on SMP capable |
| 201 | * platforms, after reading this value -- see perf_counter_wakeup(). |
| 202 | */ |
| 203 | __u32 data_head; /* head in the data section */ |
| 204 | }; |
| 205 | |
| 206 | #define PERF_EVENT_MISC_KERNEL (1 << 0) |
| 207 | #define PERF_EVENT_MISC_USER (1 << 1) |
| 208 | #define PERF_EVENT_MISC_OVERFLOW (1 << 2) |
| 209 | |
| 210 | struct perf_event_header { |
| 211 | __u32 type; |
| 212 | __u16 misc; |
| 213 | __u16 size; |
| 214 | }; |
| 215 | |
| 216 | enum perf_event_type { |
| 217 | |
| 218 | /* |
| 219 | * The MMAP events record the PROT_EXEC mappings so that we can |
| 220 | * correlate userspace IPs to code. They have the following structure: |
| 221 | * |
| 222 | * struct { |
| 223 | * struct perf_event_header header; |
| 224 | * |
| 225 | * u32 pid, tid; |
| 226 | * u64 addr; |
| 227 | * u64 len; |
| 228 | * u64 pgoff; |
| 229 | * char filename[]; |
| 230 | * }; |
| 231 | */ |
| 232 | PERF_EVENT_MMAP = 1, |
| 233 | PERF_EVENT_MUNMAP = 2, |
| 234 | |
| 235 | /* |
| 236 | * struct { |
| 237 | * struct perf_event_header header; |
| 238 | * |
| 239 | * u32 pid, tid; |
| 240 | * char comm[]; |
| 241 | * }; |
| 242 | */ |
| 243 | PERF_EVENT_COMM = 3, |
| 244 | |
| 245 | /* |
| 246 | * When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field |
| 247 | * will be PERF_RECORD_* |
| 248 | * |
| 249 | * struct { |
| 250 | * struct perf_event_header header; |
| 251 | * |
| 252 | * { u64 ip; } && PERF_RECORD_IP |
| 253 | * { u32 pid, tid; } && PERF_RECORD_TID |
| 254 | * { u64 time; } && PERF_RECORD_TIME |
| 255 | * { u64 addr; } && PERF_RECORD_ADDR |
| 256 | * |
| 257 | * { u64 nr; |
| 258 | * { u64 event, val; } cnt[nr]; } && PERF_RECORD_GROUP |
| 259 | * |
| 260 | * { u16 nr, |
| 261 | * hv, |
| 262 | * kernel, |
| 263 | * user; |
| 264 | * u64 ips[nr]; } && PERF_RECORD_CALLCHAIN |
| 265 | * }; |
| 266 | */ |
| 267 | }; |
| 268 | |
| 269 | #ifdef __KERNEL__ |
| 270 | /* |
| 271 | * Kernel-internal data types and definitions: |
| 272 | */ |
| 273 | |
| 274 | #ifdef CONFIG_PERF_COUNTERS |
| 275 | # include <asm/perf_counter.h> |
| 276 | #endif |
| 277 | |
| 278 | #include <linux/list.h> |
| 279 | #include <linux/mutex.h> |
| 280 | #include <linux/rculist.h> |
| 281 | #include <linux/rcupdate.h> |
| 282 | #include <linux/spinlock.h> |
| 283 | #include <linux/hrtimer.h> |
| 284 | #include <linux/fs.h> |
| 285 | #include <asm/atomic.h> |
| 286 | |
| 287 | struct task_struct; |
| 288 | |
| 289 | static inline u64 perf_event_raw(struct perf_counter_hw_event *hw_event) |
| 290 | { |
| 291 | return hw_event->config & PERF_COUNTER_RAW_MASK; |
| 292 | } |
| 293 | |
| 294 | static inline u64 perf_event_config(struct perf_counter_hw_event *hw_event) |
| 295 | { |
| 296 | return hw_event->config & PERF_COUNTER_CONFIG_MASK; |
| 297 | } |
| 298 | |
| 299 | static inline u64 perf_event_type(struct perf_counter_hw_event *hw_event) |
| 300 | { |
| 301 | return (hw_event->config & PERF_COUNTER_TYPE_MASK) >> |
| 302 | PERF_COUNTER_TYPE_SHIFT; |
| 303 | } |
| 304 | |
| 305 | static inline u64 perf_event_id(struct perf_counter_hw_event *hw_event) |
| 306 | { |
| 307 | return hw_event->config & PERF_COUNTER_EVENT_MASK; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * struct hw_perf_counter - performance counter hardware details: |
| 312 | */ |
| 313 | struct hw_perf_counter { |
| 314 | #ifdef CONFIG_PERF_COUNTERS |
| 315 | union { |
| 316 | struct { /* hardware */ |
| 317 | u64 config; |
| 318 | unsigned long config_base; |
| 319 | unsigned long counter_base; |
| 320 | int nmi; |
| 321 | unsigned int idx; |
| 322 | }; |
| 323 | union { /* software */ |
| 324 | atomic64_t count; |
| 325 | struct hrtimer hrtimer; |
| 326 | }; |
| 327 | }; |
| 328 | atomic64_t prev_count; |
| 329 | u64 irq_period; |
| 330 | atomic64_t period_left; |
| 331 | #endif |
| 332 | }; |
| 333 | |
| 334 | struct perf_counter; |
| 335 | |
| 336 | /** |
| 337 | * struct hw_perf_counter_ops - performance counter hw ops |
| 338 | */ |
| 339 | struct hw_perf_counter_ops { |
| 340 | int (*enable) (struct perf_counter *counter); |
| 341 | void (*disable) (struct perf_counter *counter); |
| 342 | void (*read) (struct perf_counter *counter); |
| 343 | }; |
| 344 | |
| 345 | /** |
| 346 | * enum perf_counter_active_state - the states of a counter |
| 347 | */ |
| 348 | enum perf_counter_active_state { |
| 349 | PERF_COUNTER_STATE_ERROR = -2, |
| 350 | PERF_COUNTER_STATE_OFF = -1, |
| 351 | PERF_COUNTER_STATE_INACTIVE = 0, |
| 352 | PERF_COUNTER_STATE_ACTIVE = 1, |
| 353 | }; |
| 354 | |
| 355 | struct file; |
| 356 | |
| 357 | struct perf_mmap_data { |
| 358 | struct rcu_head rcu_head; |
| 359 | int nr_pages; /* nr of data pages */ |
| 360 | |
| 361 | atomic_t wakeup; /* POLL_ for wakeups */ |
| 362 | atomic_t head; /* write position */ |
| 363 | atomic_t events; /* event limit */ |
| 364 | |
| 365 | struct perf_counter_mmap_page *user_page; |
| 366 | void *data_pages[0]; |
| 367 | }; |
| 368 | |
| 369 | struct perf_pending_entry { |
| 370 | struct perf_pending_entry *next; |
| 371 | void (*func)(struct perf_pending_entry *); |
| 372 | }; |
| 373 | |
| 374 | /** |
| 375 | * struct perf_counter - performance counter kernel representation: |
| 376 | */ |
| 377 | struct perf_counter { |
| 378 | #ifdef CONFIG_PERF_COUNTERS |
| 379 | struct list_head list_entry; |
| 380 | struct list_head event_entry; |
| 381 | struct list_head sibling_list; |
| 382 | int nr_siblings; |
| 383 | struct perf_counter *group_leader; |
| 384 | const struct hw_perf_counter_ops *hw_ops; |
| 385 | |
| 386 | enum perf_counter_active_state state; |
| 387 | enum perf_counter_active_state prev_state; |
| 388 | atomic64_t count; |
| 389 | |
| 390 | /* |
| 391 | * These are the total time in nanoseconds that the counter |
| 392 | * has been enabled (i.e. eligible to run, and the task has |
| 393 | * been scheduled in, if this is a per-task counter) |
| 394 | * and running (scheduled onto the CPU), respectively. |
| 395 | * |
| 396 | * They are computed from tstamp_enabled, tstamp_running and |
| 397 | * tstamp_stopped when the counter is in INACTIVE or ACTIVE state. |
| 398 | */ |
| 399 | u64 total_time_enabled; |
| 400 | u64 total_time_running; |
| 401 | |
| 402 | /* |
| 403 | * These are timestamps used for computing total_time_enabled |
| 404 | * and total_time_running when the counter is in INACTIVE or |
| 405 | * ACTIVE state, measured in nanoseconds from an arbitrary point |
| 406 | * in time. |
| 407 | * tstamp_enabled: the notional time when the counter was enabled |
| 408 | * tstamp_running: the notional time when the counter was scheduled on |
| 409 | * tstamp_stopped: in INACTIVE state, the notional time when the |
| 410 | * counter was scheduled off. |
| 411 | */ |
| 412 | u64 tstamp_enabled; |
| 413 | u64 tstamp_running; |
| 414 | u64 tstamp_stopped; |
| 415 | |
| 416 | struct perf_counter_hw_event hw_event; |
| 417 | struct hw_perf_counter hw; |
| 418 | |
| 419 | struct perf_counter_context *ctx; |
| 420 | struct task_struct *task; |
| 421 | struct file *filp; |
| 422 | |
| 423 | struct perf_counter *parent; |
| 424 | struct list_head child_list; |
| 425 | |
| 426 | /* |
| 427 | * These accumulate total time (in nanoseconds) that children |
| 428 | * counters have been enabled and running, respectively. |
| 429 | */ |
| 430 | atomic64_t child_total_time_enabled; |
| 431 | atomic64_t child_total_time_running; |
| 432 | |
| 433 | /* |
| 434 | * Protect attach/detach and child_list: |
| 435 | */ |
| 436 | struct mutex mutex; |
| 437 | |
| 438 | int oncpu; |
| 439 | int cpu; |
| 440 | |
| 441 | /* mmap bits */ |
| 442 | struct mutex mmap_mutex; |
| 443 | atomic_t mmap_count; |
| 444 | struct perf_mmap_data *data; |
| 445 | |
| 446 | /* poll related */ |
| 447 | wait_queue_head_t waitq; |
| 448 | struct fasync_struct *fasync; |
| 449 | |
| 450 | /* delayed work for NMIs and such */ |
| 451 | int pending_wakeup; |
| 452 | int pending_kill; |
| 453 | int pending_disable; |
| 454 | struct perf_pending_entry pending; |
| 455 | |
| 456 | atomic_t event_limit; |
| 457 | |
| 458 | void (*destroy)(struct perf_counter *); |
| 459 | struct rcu_head rcu_head; |
| 460 | #endif |
| 461 | }; |
| 462 | |
| 463 | /** |
| 464 | * struct perf_counter_context - counter context structure |
| 465 | * |
| 466 | * Used as a container for task counters and CPU counters as well: |
| 467 | */ |
| 468 | struct perf_counter_context { |
| 469 | #ifdef CONFIG_PERF_COUNTERS |
| 470 | /* |
| 471 | * Protect the states of the counters in the list, |
| 472 | * nr_active, and the list: |
| 473 | */ |
| 474 | spinlock_t lock; |
| 475 | /* |
| 476 | * Protect the list of counters. Locking either mutex or lock |
| 477 | * is sufficient to ensure the list doesn't change; to change |
| 478 | * the list you need to lock both the mutex and the spinlock. |
| 479 | */ |
| 480 | struct mutex mutex; |
| 481 | |
| 482 | struct list_head counter_list; |
| 483 | struct list_head event_list; |
| 484 | int nr_counters; |
| 485 | int nr_active; |
| 486 | int is_active; |
| 487 | struct task_struct *task; |
| 488 | |
| 489 | /* |
| 490 | * Context clock, runs when context enabled. |
| 491 | */ |
| 492 | u64 time; |
| 493 | u64 timestamp; |
| 494 | #endif |
| 495 | }; |
| 496 | |
| 497 | /** |
| 498 | * struct perf_counter_cpu_context - per cpu counter context structure |
| 499 | */ |
| 500 | struct perf_cpu_context { |
| 501 | struct perf_counter_context ctx; |
| 502 | struct perf_counter_context *task_ctx; |
| 503 | int active_oncpu; |
| 504 | int max_pertask; |
| 505 | int exclusive; |
| 506 | |
| 507 | /* |
| 508 | * Recursion avoidance: |
| 509 | * |
| 510 | * task, softirq, irq, nmi context |
| 511 | */ |
| 512 | int recursion[4]; |
| 513 | }; |
| 514 | |
| 515 | #ifdef CONFIG_PERF_COUNTERS |
| 516 | |
| 517 | /* |
| 518 | * Set by architecture code: |
| 519 | */ |
| 520 | extern int perf_max_counters; |
| 521 | |
| 522 | extern const struct hw_perf_counter_ops * |
| 523 | hw_perf_counter_init(struct perf_counter *counter); |
| 524 | |
| 525 | extern void perf_counter_task_sched_in(struct task_struct *task, int cpu); |
| 526 | extern void perf_counter_task_sched_out(struct task_struct *task, int cpu); |
| 527 | extern void perf_counter_task_tick(struct task_struct *task, int cpu); |
| 528 | extern void perf_counter_init_task(struct task_struct *child); |
| 529 | extern void perf_counter_exit_task(struct task_struct *child); |
| 530 | extern void perf_counter_do_pending(void); |
| 531 | extern void perf_counter_print_debug(void); |
| 532 | extern void perf_counter_unthrottle(void); |
| 533 | extern u64 hw_perf_save_disable(void); |
| 534 | extern void hw_perf_restore(u64 ctrl); |
| 535 | extern int perf_counter_task_disable(void); |
| 536 | extern int perf_counter_task_enable(void); |
| 537 | extern int hw_perf_group_sched_in(struct perf_counter *group_leader, |
| 538 | struct perf_cpu_context *cpuctx, |
| 539 | struct perf_counter_context *ctx, int cpu); |
| 540 | extern void perf_counter_update_userpage(struct perf_counter *counter); |
| 541 | |
| 542 | extern int perf_counter_overflow(struct perf_counter *counter, |
| 543 | int nmi, struct pt_regs *regs, u64 addr); |
| 544 | /* |
| 545 | * Return 1 for a software counter, 0 for a hardware counter |
| 546 | */ |
| 547 | static inline int is_software_counter(struct perf_counter *counter) |
| 548 | { |
| 549 | return !perf_event_raw(&counter->hw_event) && |
| 550 | perf_event_type(&counter->hw_event) != PERF_TYPE_HARDWARE; |
| 551 | } |
| 552 | |
| 553 | extern void perf_swcounter_event(u32, u64, int, struct pt_regs *, u64); |
| 554 | |
| 555 | extern void perf_counter_mmap(unsigned long addr, unsigned long len, |
| 556 | unsigned long pgoff, struct file *file); |
| 557 | |
| 558 | extern void perf_counter_munmap(unsigned long addr, unsigned long len, |
| 559 | unsigned long pgoff, struct file *file); |
| 560 | |
| 561 | extern void perf_counter_comm(struct task_struct *tsk); |
| 562 | |
| 563 | #define MAX_STACK_DEPTH 255 |
| 564 | |
| 565 | struct perf_callchain_entry { |
| 566 | u16 nr, hv, kernel, user; |
| 567 | u64 ip[MAX_STACK_DEPTH]; |
| 568 | }; |
| 569 | |
| 570 | extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); |
| 571 | |
| 572 | extern int sysctl_perf_counter_priv; |
| 573 | |
| 574 | #else |
| 575 | static inline void |
| 576 | perf_counter_task_sched_in(struct task_struct *task, int cpu) { } |
| 577 | static inline void |
| 578 | perf_counter_task_sched_out(struct task_struct *task, int cpu) { } |
| 579 | static inline void |
| 580 | perf_counter_task_tick(struct task_struct *task, int cpu) { } |
| 581 | static inline void perf_counter_init_task(struct task_struct *child) { } |
| 582 | static inline void perf_counter_exit_task(struct task_struct *child) { } |
| 583 | static inline void perf_counter_do_pending(void) { } |
| 584 | static inline void perf_counter_print_debug(void) { } |
| 585 | static inline void perf_counter_unthrottle(void) { } |
| 586 | static inline void hw_perf_restore(u64 ctrl) { } |
| 587 | static inline u64 hw_perf_save_disable(void) { return 0; } |
| 588 | static inline int perf_counter_task_disable(void) { return -EINVAL; } |
| 589 | static inline int perf_counter_task_enable(void) { return -EINVAL; } |
| 590 | |
| 591 | static inline void |
| 592 | perf_swcounter_event(u32 event, u64 nr, int nmi, |
| 593 | struct pt_regs *regs, u64 addr) { } |
| 594 | |
| 595 | static inline void |
| 596 | perf_counter_mmap(unsigned long addr, unsigned long len, |
| 597 | unsigned long pgoff, struct file *file) { } |
| 598 | |
| 599 | static inline void |
| 600 | perf_counter_munmap(unsigned long addr, unsigned long len, |
| 601 | unsigned long pgoff, struct file *file) { } |
| 602 | |
| 603 | static inline void perf_counter_comm(struct task_struct *tsk) { } |
| 604 | #endif |
| 605 | |
| 606 | #endif /* __KERNEL__ */ |
| 607 | #endif /* _LINUX_PERF_COUNTER_H */ |