1 /* 2 * Performance events x86 architecture header 3 * 4 * Copyright (C) 2008 Thomas Gleixner <tglx@linutronix.de> 5 * Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar 6 * Copyright (C) 2009 Jaswinder Singh Rajput 7 * Copyright (C) 2009 Advanced Micro Devices, Inc., Robert Richter 8 * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra 9 * Copyright (C) 2009 Intel Corporation, <markus.t.metzger@intel.com> 10 * Copyright (C) 2009 Google, Inc., Stephane Eranian 11 * 12 * For licencing details see kernel-base/COPYING 13 */ 14 15 #include <linux/perf_event.h> 16 17 #include <asm/fpu/xstate.h> 18 #include <asm/intel_ds.h> 19 #include <asm/cpu.h> 20 21 /* To enable MSR tracing please use the generic trace points. */ 22 23 /* 24 * | NHM/WSM | SNB | 25 * register ------------------------------- 26 * | HT | no HT | HT | no HT | 27 *----------------------------------------- 28 * offcore | core | core | cpu | core | 29 * lbr_sel | core | core | cpu | core | 30 * ld_lat | cpu | core | cpu | core | 31 *----------------------------------------- 32 * 33 * Given that there is a small number of shared regs, 34 * we can pre-allocate their slot in the per-cpu 35 * per-core reg tables. 36 */ 37 enum extra_reg_type { 38 EXTRA_REG_NONE = -1, /* not used */ 39 40 EXTRA_REG_RSP_0 = 0, /* offcore_response_0 */ 41 EXTRA_REG_RSP_1 = 1, /* offcore_response_1 */ 42 EXTRA_REG_LBR = 2, /* lbr_select */ 43 EXTRA_REG_LDLAT = 3, /* ld_lat_threshold */ 44 EXTRA_REG_FE = 4, /* fe_* */ 45 EXTRA_REG_SNOOP_0 = 5, /* snoop response 0 */ 46 EXTRA_REG_SNOOP_1 = 6, /* snoop response 1 */ 47 48 EXTRA_REG_MAX /* number of entries needed */ 49 }; 50 51 struct event_constraint { 52 union { 53 unsigned long idxmsk[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; 54 u64 idxmsk64; 55 }; 56 u64 code; 57 u64 cmask; 58 int weight; 59 int overlap; 60 int flags; 61 unsigned int size; 62 }; 63 64 static inline bool constraint_match(struct event_constraint *c, u64 ecode) 65 { 66 return ((ecode & c->cmask) - c->code) <= (u64)c->size; 67 } 68 69 #define PERF_ARCH(name, val) \ 70 PERF_X86_EVENT_##name = val, 71 72 /* 73 * struct hw_perf_event.flags flags 74 */ 75 enum { 76 #include "perf_event_flags.h" 77 }; 78 79 #undef PERF_ARCH 80 81 #define PERF_ARCH(name, val) \ 82 static_assert((PERF_X86_EVENT_##name & PERF_EVENT_FLAG_ARCH) == \ 83 PERF_X86_EVENT_##name); 84 85 #include "perf_event_flags.h" 86 87 #undef PERF_ARCH 88 89 static inline bool is_topdown_count(struct perf_event *event) 90 { 91 return event->hw.flags & PERF_X86_EVENT_TOPDOWN; 92 } 93 94 static inline bool is_metric_event(struct perf_event *event) 95 { 96 u64 config = event->attr.config; 97 98 return ((config & ARCH_PERFMON_EVENTSEL_EVENT) == 0) && 99 ((config & INTEL_ARCH_EVENT_MASK) >= INTEL_TD_METRIC_RETIRING) && 100 ((config & INTEL_ARCH_EVENT_MASK) <= INTEL_TD_METRIC_MAX); 101 } 102 103 static inline bool is_slots_event(struct perf_event *event) 104 { 105 return (event->attr.config & INTEL_ARCH_EVENT_MASK) == INTEL_TD_SLOTS; 106 } 107 108 static inline bool is_topdown_event(struct perf_event *event) 109 { 110 return is_metric_event(event) || is_slots_event(event); 111 } 112 113 struct amd_nb { 114 int nb_id; /* NorthBridge id */ 115 int refcnt; /* reference count */ 116 struct perf_event *owners[X86_PMC_IDX_MAX]; 117 struct event_constraint event_constraints[X86_PMC_IDX_MAX]; 118 }; 119 120 #define PEBS_COUNTER_MASK ((1ULL << MAX_PEBS_EVENTS) - 1) 121 #define PEBS_PMI_AFTER_EACH_RECORD BIT_ULL(60) 122 #define PEBS_OUTPUT_OFFSET 61 123 #define PEBS_OUTPUT_MASK (3ull << PEBS_OUTPUT_OFFSET) 124 #define PEBS_OUTPUT_PT (1ull << PEBS_OUTPUT_OFFSET) 125 #define PEBS_VIA_PT_MASK (PEBS_OUTPUT_PT | PEBS_PMI_AFTER_EACH_RECORD) 126 127 /* 128 * Flags PEBS can handle without an PMI. 129 * 130 * TID can only be handled by flushing at context switch. 131 * REGS_USER can be handled for events limited to ring 3. 132 * 133 */ 134 #define LARGE_PEBS_FLAGS \ 135 (PERF_SAMPLE_IP | PERF_SAMPLE_TID | PERF_SAMPLE_ADDR | \ 136 PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_STREAM_ID | \ 137 PERF_SAMPLE_DATA_SRC | PERF_SAMPLE_IDENTIFIER | \ 138 PERF_SAMPLE_TRANSACTION | PERF_SAMPLE_PHYS_ADDR | \ 139 PERF_SAMPLE_REGS_INTR | PERF_SAMPLE_REGS_USER | \ 140 PERF_SAMPLE_PERIOD | PERF_SAMPLE_CODE_PAGE_SIZE | \ 141 PERF_SAMPLE_WEIGHT_TYPE) 142 143 #define PEBS_GP_REGS \ 144 ((1ULL << PERF_REG_X86_AX) | \ 145 (1ULL << PERF_REG_X86_BX) | \ 146 (1ULL << PERF_REG_X86_CX) | \ 147 (1ULL << PERF_REG_X86_DX) | \ 148 (1ULL << PERF_REG_X86_DI) | \ 149 (1ULL << PERF_REG_X86_SI) | \ 150 (1ULL << PERF_REG_X86_SP) | \ 151 (1ULL << PERF_REG_X86_BP) | \ 152 (1ULL << PERF_REG_X86_IP) | \ 153 (1ULL << PERF_REG_X86_FLAGS) | \ 154 (1ULL << PERF_REG_X86_R8) | \ 155 (1ULL << PERF_REG_X86_R9) | \ 156 (1ULL << PERF_REG_X86_R10) | \ 157 (1ULL << PERF_REG_X86_R11) | \ 158 (1ULL << PERF_REG_X86_R12) | \ 159 (1ULL << PERF_REG_X86_R13) | \ 160 (1ULL << PERF_REG_X86_R14) | \ 161 (1ULL << PERF_REG_X86_R15)) 162 163 /* 164 * Per register state. 165 */ 166 struct er_account { 167 raw_spinlock_t lock; /* per-core: protect structure */ 168 u64 config; /* extra MSR config */ 169 u64 reg; /* extra MSR number */ 170 atomic_t ref; /* reference count */ 171 }; 172 173 /* 174 * Per core/cpu state 175 * 176 * Used to coordinate shared registers between HT threads or 177 * among events on a single PMU. 178 */ 179 struct intel_shared_regs { 180 struct er_account regs[EXTRA_REG_MAX]; 181 int refcnt; /* per-core: #HT threads */ 182 unsigned core_id; /* per-core: core id */ 183 }; 184 185 enum intel_excl_state_type { 186 INTEL_EXCL_UNUSED = 0, /* counter is unused */ 187 INTEL_EXCL_SHARED = 1, /* counter can be used by both threads */ 188 INTEL_EXCL_EXCLUSIVE = 2, /* counter can be used by one thread only */ 189 }; 190 191 struct intel_excl_states { 192 enum intel_excl_state_type state[X86_PMC_IDX_MAX]; 193 bool sched_started; /* true if scheduling has started */ 194 }; 195 196 struct intel_excl_cntrs { 197 raw_spinlock_t lock; 198 199 struct intel_excl_states states[2]; 200 201 union { 202 u16 has_exclusive[2]; 203 u32 exclusive_present; 204 }; 205 206 int refcnt; /* per-core: #HT threads */ 207 unsigned core_id; /* per-core: core id */ 208 }; 209 210 struct x86_perf_task_context; 211 #define MAX_LBR_ENTRIES 32 212 213 enum { 214 LBR_FORMAT_32 = 0x00, 215 LBR_FORMAT_LIP = 0x01, 216 LBR_FORMAT_EIP = 0x02, 217 LBR_FORMAT_EIP_FLAGS = 0x03, 218 LBR_FORMAT_EIP_FLAGS2 = 0x04, 219 LBR_FORMAT_INFO = 0x05, 220 LBR_FORMAT_TIME = 0x06, 221 LBR_FORMAT_INFO2 = 0x07, 222 LBR_FORMAT_MAX_KNOWN = LBR_FORMAT_INFO2, 223 }; 224 225 enum { 226 X86_PERF_KFREE_SHARED = 0, 227 X86_PERF_KFREE_EXCL = 1, 228 X86_PERF_KFREE_MAX 229 }; 230 231 struct cpu_hw_events { 232 /* 233 * Generic x86 PMC bits 234 */ 235 struct perf_event *events[X86_PMC_IDX_MAX]; /* in counter order */ 236 unsigned long active_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; 237 unsigned long dirty[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; 238 int enabled; 239 240 int n_events; /* the # of events in the below arrays */ 241 int n_added; /* the # last events in the below arrays; 242 they've never been enabled yet */ 243 int n_txn; /* the # last events in the below arrays; 244 added in the current transaction */ 245 int n_txn_pair; 246 int n_txn_metric; 247 int assign[X86_PMC_IDX_MAX]; /* event to counter assignment */ 248 u64 tags[X86_PMC_IDX_MAX]; 249 250 struct perf_event *event_list[X86_PMC_IDX_MAX]; /* in enabled order */ 251 struct event_constraint *event_constraint[X86_PMC_IDX_MAX]; 252 253 int n_excl; /* the number of exclusive events */ 254 255 unsigned int txn_flags; 256 int is_fake; 257 258 /* 259 * Intel DebugStore bits 260 */ 261 struct debug_store *ds; 262 void *ds_pebs_vaddr; 263 void *ds_bts_vaddr; 264 u64 pebs_enabled; 265 int n_pebs; 266 int n_large_pebs; 267 int n_pebs_via_pt; 268 int pebs_output; 269 270 /* Current super set of events hardware configuration */ 271 u64 pebs_data_cfg; 272 u64 active_pebs_data_cfg; 273 int pebs_record_size; 274 275 /* Intel Fixed counter configuration */ 276 u64 fixed_ctrl_val; 277 u64 active_fixed_ctrl_val; 278 279 /* 280 * Intel LBR bits 281 */ 282 int lbr_users; 283 int lbr_pebs_users; 284 struct perf_branch_stack lbr_stack; 285 struct perf_branch_entry lbr_entries[MAX_LBR_ENTRIES]; 286 union { 287 struct er_account *lbr_sel; 288 struct er_account *lbr_ctl; 289 }; 290 u64 br_sel; 291 void *last_task_ctx; 292 int last_log_id; 293 int lbr_select; 294 void *lbr_xsave; 295 296 /* 297 * Intel host/guest exclude bits 298 */ 299 u64 intel_ctrl_guest_mask; 300 u64 intel_ctrl_host_mask; 301 struct perf_guest_switch_msr guest_switch_msrs[X86_PMC_IDX_MAX]; 302 303 /* 304 * Intel checkpoint mask 305 */ 306 u64 intel_cp_status; 307 308 /* 309 * manage shared (per-core, per-cpu) registers 310 * used on Intel NHM/WSM/SNB 311 */ 312 struct intel_shared_regs *shared_regs; 313 /* 314 * manage exclusive counter access between hyperthread 315 */ 316 struct event_constraint *constraint_list; /* in enable order */ 317 struct intel_excl_cntrs *excl_cntrs; 318 int excl_thread_id; /* 0 or 1 */ 319 320 /* 321 * SKL TSX_FORCE_ABORT shadow 322 */ 323 u64 tfa_shadow; 324 325 /* 326 * Perf Metrics 327 */ 328 /* number of accepted metrics events */ 329 int n_metric; 330 331 /* 332 * AMD specific bits 333 */ 334 struct amd_nb *amd_nb; 335 int brs_active; /* BRS is enabled */ 336 337 /* Inverted mask of bits to clear in the perf_ctr ctrl registers */ 338 u64 perf_ctr_virt_mask; 339 int n_pair; /* Large increment events */ 340 341 void *kfree_on_online[X86_PERF_KFREE_MAX]; 342 343 struct pmu *pmu; 344 }; 345 346 #define __EVENT_CONSTRAINT_RANGE(c, e, n, m, w, o, f) { \ 347 { .idxmsk64 = (n) }, \ 348 .code = (c), \ 349 .size = (e) - (c), \ 350 .cmask = (m), \ 351 .weight = (w), \ 352 .overlap = (o), \ 353 .flags = f, \ 354 } 355 356 #define __EVENT_CONSTRAINT(c, n, m, w, o, f) \ 357 __EVENT_CONSTRAINT_RANGE(c, c, n, m, w, o, f) 358 359 #define EVENT_CONSTRAINT(c, n, m) \ 360 __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 0, 0) 361 362 /* 363 * The constraint_match() function only works for 'simple' event codes 364 * and not for extended (AMD64_EVENTSEL_EVENT) events codes. 365 */ 366 #define EVENT_CONSTRAINT_RANGE(c, e, n, m) \ 367 __EVENT_CONSTRAINT_RANGE(c, e, n, m, HWEIGHT(n), 0, 0) 368 369 #define INTEL_EXCLEVT_CONSTRAINT(c, n) \ 370 __EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT, HWEIGHT(n),\ 371 0, PERF_X86_EVENT_EXCL) 372 373 /* 374 * The overlap flag marks event constraints with overlapping counter 375 * masks. This is the case if the counter mask of such an event is not 376 * a subset of any other counter mask of a constraint with an equal or 377 * higher weight, e.g.: 378 * 379 * c_overlaps = EVENT_CONSTRAINT_OVERLAP(0, 0x09, 0); 380 * c_another1 = EVENT_CONSTRAINT(0, 0x07, 0); 381 * c_another2 = EVENT_CONSTRAINT(0, 0x38, 0); 382 * 383 * The event scheduler may not select the correct counter in the first 384 * cycle because it needs to know which subsequent events will be 385 * scheduled. It may fail to schedule the events then. So we set the 386 * overlap flag for such constraints to give the scheduler a hint which 387 * events to select for counter rescheduling. 388 * 389 * Care must be taken as the rescheduling algorithm is O(n!) which 390 * will increase scheduling cycles for an over-committed system 391 * dramatically. The number of such EVENT_CONSTRAINT_OVERLAP() macros 392 * and its counter masks must be kept at a minimum. 393 */ 394 #define EVENT_CONSTRAINT_OVERLAP(c, n, m) \ 395 __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 1, 0) 396 397 /* 398 * Constraint on the Event code. 399 */ 400 #define INTEL_EVENT_CONSTRAINT(c, n) \ 401 EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT) 402 403 /* 404 * Constraint on a range of Event codes 405 */ 406 #define INTEL_EVENT_CONSTRAINT_RANGE(c, e, n) \ 407 EVENT_CONSTRAINT_RANGE(c, e, n, ARCH_PERFMON_EVENTSEL_EVENT) 408 409 /* 410 * Constraint on the Event code + UMask + fixed-mask 411 * 412 * filter mask to validate fixed counter events. 413 * the following filters disqualify for fixed counters: 414 * - inv 415 * - edge 416 * - cnt-mask 417 * - in_tx 418 * - in_tx_checkpointed 419 * The other filters are supported by fixed counters. 420 * The any-thread option is supported starting with v3. 421 */ 422 #define FIXED_EVENT_FLAGS (X86_RAW_EVENT_MASK|HSW_IN_TX|HSW_IN_TX_CHECKPOINTED) 423 #define FIXED_EVENT_CONSTRAINT(c, n) \ 424 EVENT_CONSTRAINT(c, (1ULL << (32+n)), FIXED_EVENT_FLAGS) 425 426 /* 427 * The special metric counters do not actually exist. They are calculated from 428 * the combination of the FxCtr3 + MSR_PERF_METRICS. 429 * 430 * The special metric counters are mapped to a dummy offset for the scheduler. 431 * The sharing between multiple users of the same metric without multiplexing 432 * is not allowed, even though the hardware supports that in principle. 433 */ 434 435 #define METRIC_EVENT_CONSTRAINT(c, n) \ 436 EVENT_CONSTRAINT(c, (1ULL << (INTEL_PMC_IDX_METRIC_BASE + n)), \ 437 INTEL_ARCH_EVENT_MASK) 438 439 /* 440 * Constraint on the Event code + UMask 441 */ 442 #define INTEL_UEVENT_CONSTRAINT(c, n) \ 443 EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK) 444 445 /* Constraint on specific umask bit only + event */ 446 #define INTEL_UBIT_EVENT_CONSTRAINT(c, n) \ 447 EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT|(c)) 448 449 /* Like UEVENT_CONSTRAINT, but match flags too */ 450 #define INTEL_FLAGS_UEVENT_CONSTRAINT(c, n) \ 451 EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS) 452 453 #define INTEL_EXCLUEVT_CONSTRAINT(c, n) \ 454 __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK, \ 455 HWEIGHT(n), 0, PERF_X86_EVENT_EXCL) 456 457 #define INTEL_PLD_CONSTRAINT(c, n) \ 458 __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ 459 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LDLAT) 460 461 #define INTEL_PSD_CONSTRAINT(c, n) \ 462 __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ 463 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_STLAT) 464 465 #define INTEL_PST_CONSTRAINT(c, n) \ 466 __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ 467 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_ST) 468 469 #define INTEL_HYBRID_LAT_CONSTRAINT(c, n) \ 470 __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ 471 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LAT_HYBRID) 472 473 /* Event constraint, but match on all event flags too. */ 474 #define INTEL_FLAGS_EVENT_CONSTRAINT(c, n) \ 475 EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS) 476 477 #define INTEL_FLAGS_EVENT_CONSTRAINT_RANGE(c, e, n) \ 478 EVENT_CONSTRAINT_RANGE(c, e, n, ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS) 479 480 /* Check only flags, but allow all event/umask */ 481 #define INTEL_ALL_EVENT_CONSTRAINT(code, n) \ 482 EVENT_CONSTRAINT(code, n, X86_ALL_EVENT_FLAGS) 483 484 /* Check flags and event code, and set the HSW store flag */ 485 #define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_ST(code, n) \ 486 __EVENT_CONSTRAINT(code, n, \ 487 ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \ 488 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_ST_HSW) 489 490 /* Check flags and event code, and set the HSW load flag */ 491 #define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(code, n) \ 492 __EVENT_CONSTRAINT(code, n, \ 493 ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \ 494 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LD_HSW) 495 496 #define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD_RANGE(code, end, n) \ 497 __EVENT_CONSTRAINT_RANGE(code, end, n, \ 498 ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \ 499 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LD_HSW) 500 501 #define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_XLD(code, n) \ 502 __EVENT_CONSTRAINT(code, n, \ 503 ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \ 504 HWEIGHT(n), 0, \ 505 PERF_X86_EVENT_PEBS_LD_HSW|PERF_X86_EVENT_EXCL) 506 507 /* Check flags and event code/umask, and set the HSW store flag */ 508 #define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(code, n) \ 509 __EVENT_CONSTRAINT(code, n, \ 510 INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ 511 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_ST_HSW) 512 513 #define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XST(code, n) \ 514 __EVENT_CONSTRAINT(code, n, \ 515 INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ 516 HWEIGHT(n), 0, \ 517 PERF_X86_EVENT_PEBS_ST_HSW|PERF_X86_EVENT_EXCL) 518 519 /* Check flags and event code/umask, and set the HSW load flag */ 520 #define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(code, n) \ 521 __EVENT_CONSTRAINT(code, n, \ 522 INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ 523 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LD_HSW) 524 525 #define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(code, n) \ 526 __EVENT_CONSTRAINT(code, n, \ 527 INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ 528 HWEIGHT(n), 0, \ 529 PERF_X86_EVENT_PEBS_LD_HSW|PERF_X86_EVENT_EXCL) 530 531 /* Check flags and event code/umask, and set the HSW N/A flag */ 532 #define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_NA(code, n) \ 533 __EVENT_CONSTRAINT(code, n, \ 534 INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ 535 HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_NA_HSW) 536 537 538 /* 539 * We define the end marker as having a weight of -1 540 * to enable blacklisting of events using a counter bitmask 541 * of zero and thus a weight of zero. 542 * The end marker has a weight that cannot possibly be 543 * obtained from counting the bits in the bitmask. 544 */ 545 #define EVENT_CONSTRAINT_END { .weight = -1 } 546 547 /* 548 * Check for end marker with weight == -1 549 */ 550 #define for_each_event_constraint(e, c) \ 551 for ((e) = (c); (e)->weight != -1; (e)++) 552 553 /* 554 * Extra registers for specific events. 555 * 556 * Some events need large masks and require external MSRs. 557 * Those extra MSRs end up being shared for all events on 558 * a PMU and sometimes between PMU of sibling HT threads. 559 * In either case, the kernel needs to handle conflicting 560 * accesses to those extra, shared, regs. The data structure 561 * to manage those registers is stored in cpu_hw_event. 562 */ 563 struct extra_reg { 564 unsigned int event; 565 unsigned int msr; 566 u64 config_mask; 567 u64 valid_mask; 568 int idx; /* per_xxx->regs[] reg index */ 569 bool extra_msr_access; 570 }; 571 572 #define EVENT_EXTRA_REG(e, ms, m, vm, i) { \ 573 .event = (e), \ 574 .msr = (ms), \ 575 .config_mask = (m), \ 576 .valid_mask = (vm), \ 577 .idx = EXTRA_REG_##i, \ 578 .extra_msr_access = true, \ 579 } 580 581 #define INTEL_EVENT_EXTRA_REG(event, msr, vm, idx) \ 582 EVENT_EXTRA_REG(event, msr, ARCH_PERFMON_EVENTSEL_EVENT, vm, idx) 583 584 #define INTEL_UEVENT_EXTRA_REG(event, msr, vm, idx) \ 585 EVENT_EXTRA_REG(event, msr, ARCH_PERFMON_EVENTSEL_EVENT | \ 586 ARCH_PERFMON_EVENTSEL_UMASK, vm, idx) 587 588 #define INTEL_UEVENT_PEBS_LDLAT_EXTRA_REG(c) \ 589 INTEL_UEVENT_EXTRA_REG(c, \ 590 MSR_PEBS_LD_LAT_THRESHOLD, \ 591 0xffff, \ 592 LDLAT) 593 594 #define EVENT_EXTRA_END EVENT_EXTRA_REG(0, 0, 0, 0, RSP_0) 595 596 union perf_capabilities { 597 struct { 598 u64 lbr_format:6; 599 u64 pebs_trap:1; 600 u64 pebs_arch_reg:1; 601 u64 pebs_format:4; 602 u64 smm_freeze:1; 603 /* 604 * PMU supports separate counter range for writing 605 * values > 32bit. 606 */ 607 u64 full_width_write:1; 608 u64 pebs_baseline:1; 609 u64 perf_metrics:1; 610 u64 pebs_output_pt_available:1; 611 u64 pebs_timing_info:1; 612 u64 anythread_deprecated:1; 613 }; 614 u64 capabilities; 615 }; 616 617 struct x86_pmu_quirk { 618 struct x86_pmu_quirk *next; 619 void (*func)(void); 620 }; 621 622 union x86_pmu_config { 623 struct { 624 u64 event:8, 625 umask:8, 626 usr:1, 627 os:1, 628 edge:1, 629 pc:1, 630 interrupt:1, 631 __reserved1:1, 632 en:1, 633 inv:1, 634 cmask:8, 635 event2:4, 636 __reserved2:4, 637 go:1, 638 ho:1; 639 } bits; 640 u64 value; 641 }; 642 643 #define X86_CONFIG(args...) ((union x86_pmu_config){.bits = {args}}).value 644 645 enum { 646 x86_lbr_exclusive_lbr, 647 x86_lbr_exclusive_bts, 648 x86_lbr_exclusive_pt, 649 x86_lbr_exclusive_max, 650 }; 651 652 #define PERF_PEBS_DATA_SOURCE_MAX 0x10 653 #define PERF_PEBS_DATA_SOURCE_MASK (PERF_PEBS_DATA_SOURCE_MAX - 1) 654 655 struct x86_hybrid_pmu { 656 struct pmu pmu; 657 const char *name; 658 u8 cpu_type; 659 cpumask_t supported_cpus; 660 union perf_capabilities intel_cap; 661 u64 intel_ctrl; 662 int max_pebs_events; 663 int num_counters; 664 int num_counters_fixed; 665 struct event_constraint unconstrained; 666 667 u64 hw_cache_event_ids 668 [PERF_COUNT_HW_CACHE_MAX] 669 [PERF_COUNT_HW_CACHE_OP_MAX] 670 [PERF_COUNT_HW_CACHE_RESULT_MAX]; 671 u64 hw_cache_extra_regs 672 [PERF_COUNT_HW_CACHE_MAX] 673 [PERF_COUNT_HW_CACHE_OP_MAX] 674 [PERF_COUNT_HW_CACHE_RESULT_MAX]; 675 struct event_constraint *event_constraints; 676 struct event_constraint *pebs_constraints; 677 struct extra_reg *extra_regs; 678 679 unsigned int late_ack :1, 680 mid_ack :1, 681 enabled_ack :1; 682 683 u64 pebs_data_source[PERF_PEBS_DATA_SOURCE_MAX]; 684 }; 685 686 static __always_inline struct x86_hybrid_pmu *hybrid_pmu(struct pmu *pmu) 687 { 688 return container_of(pmu, struct x86_hybrid_pmu, pmu); 689 } 690 691 extern struct static_key_false perf_is_hybrid; 692 #define is_hybrid() static_branch_unlikely(&perf_is_hybrid) 693 694 #define hybrid(_pmu, _field) \ 695 (*({ \ 696 typeof(&x86_pmu._field) __Fp = &x86_pmu._field; \ 697 \ 698 if (is_hybrid() && (_pmu)) \ 699 __Fp = &hybrid_pmu(_pmu)->_field; \ 700 \ 701 __Fp; \ 702 })) 703 704 #define hybrid_var(_pmu, _var) \ 705 (*({ \ 706 typeof(&_var) __Fp = &_var; \ 707 \ 708 if (is_hybrid() && (_pmu)) \ 709 __Fp = &hybrid_pmu(_pmu)->_var; \ 710 \ 711 __Fp; \ 712 })) 713 714 #define hybrid_bit(_pmu, _field) \ 715 ({ \ 716 bool __Fp = x86_pmu._field; \ 717 \ 718 if (is_hybrid() && (_pmu)) \ 719 __Fp = hybrid_pmu(_pmu)->_field; \ 720 \ 721 __Fp; \ 722 }) 723 724 enum hybrid_pmu_type { 725 hybrid_big = 0x40, 726 hybrid_small = 0x20, 727 728 hybrid_big_small = hybrid_big | hybrid_small, 729 }; 730 731 #define X86_HYBRID_PMU_ATOM_IDX 0 732 #define X86_HYBRID_PMU_CORE_IDX 1 733 734 #define X86_HYBRID_NUM_PMUS 2 735 736 /* 737 * struct x86_pmu - generic x86 pmu 738 */ 739 struct x86_pmu { 740 /* 741 * Generic x86 PMC bits 742 */ 743 const char *name; 744 int version; 745 int (*handle_irq)(struct pt_regs *); 746 void (*disable_all)(void); 747 void (*enable_all)(int added); 748 void (*enable)(struct perf_event *); 749 void (*disable)(struct perf_event *); 750 void (*assign)(struct perf_event *event, int idx); 751 void (*add)(struct perf_event *); 752 void (*del)(struct perf_event *); 753 void (*read)(struct perf_event *event); 754 int (*set_period)(struct perf_event *event); 755 u64 (*update)(struct perf_event *event); 756 int (*hw_config)(struct perf_event *event); 757 int (*schedule_events)(struct cpu_hw_events *cpuc, int n, int *assign); 758 unsigned eventsel; 759 unsigned perfctr; 760 int (*addr_offset)(int index, bool eventsel); 761 int (*rdpmc_index)(int index); 762 u64 (*event_map)(int); 763 int max_events; 764 int num_counters; 765 int num_counters_fixed; 766 int cntval_bits; 767 u64 cntval_mask; 768 union { 769 unsigned long events_maskl; 770 unsigned long events_mask[BITS_TO_LONGS(ARCH_PERFMON_EVENTS_COUNT)]; 771 }; 772 int events_mask_len; 773 int apic; 774 u64 max_period; 775 struct event_constraint * 776 (*get_event_constraints)(struct cpu_hw_events *cpuc, 777 int idx, 778 struct perf_event *event); 779 780 void (*put_event_constraints)(struct cpu_hw_events *cpuc, 781 struct perf_event *event); 782 783 void (*start_scheduling)(struct cpu_hw_events *cpuc); 784 785 void (*commit_scheduling)(struct cpu_hw_events *cpuc, int idx, int cntr); 786 787 void (*stop_scheduling)(struct cpu_hw_events *cpuc); 788 789 struct event_constraint *event_constraints; 790 struct x86_pmu_quirk *quirks; 791 void (*limit_period)(struct perf_event *event, s64 *l); 792 793 /* PMI handler bits */ 794 unsigned int late_ack :1, 795 mid_ack :1, 796 enabled_ack :1; 797 /* 798 * sysfs attrs 799 */ 800 int attr_rdpmc_broken; 801 int attr_rdpmc; 802 struct attribute **format_attrs; 803 804 ssize_t (*events_sysfs_show)(char *page, u64 config); 805 const struct attribute_group **attr_update; 806 807 unsigned long attr_freeze_on_smi; 808 809 /* 810 * CPU Hotplug hooks 811 */ 812 int (*cpu_prepare)(int cpu); 813 void (*cpu_starting)(int cpu); 814 void (*cpu_dying)(int cpu); 815 void (*cpu_dead)(int cpu); 816 817 void (*check_microcode)(void); 818 void (*sched_task)(struct perf_event_pmu_context *pmu_ctx, 819 bool sched_in); 820 821 /* 822 * Intel Arch Perfmon v2+ 823 */ 824 u64 intel_ctrl; 825 union perf_capabilities intel_cap; 826 827 /* 828 * Intel DebugStore bits 829 */ 830 unsigned int bts :1, 831 bts_active :1, 832 pebs :1, 833 pebs_active :1, 834 pebs_broken :1, 835 pebs_prec_dist :1, 836 pebs_no_tlb :1, 837 pebs_no_isolation :1, 838 pebs_block :1, 839 pebs_ept :1; 840 int pebs_record_size; 841 int pebs_buffer_size; 842 int max_pebs_events; 843 void (*drain_pebs)(struct pt_regs *regs, struct perf_sample_data *data); 844 struct event_constraint *pebs_constraints; 845 void (*pebs_aliases)(struct perf_event *event); 846 u64 (*pebs_latency_data)(struct perf_event *event, u64 status); 847 unsigned long large_pebs_flags; 848 u64 rtm_abort_event; 849 u64 pebs_capable; 850 851 /* 852 * Intel LBR 853 */ 854 unsigned int lbr_tos, lbr_from, lbr_to, 855 lbr_info, lbr_nr; /* LBR base regs and size */ 856 union { 857 u64 lbr_sel_mask; /* LBR_SELECT valid bits */ 858 u64 lbr_ctl_mask; /* LBR_CTL valid bits */ 859 }; 860 union { 861 const int *lbr_sel_map; /* lbr_select mappings */ 862 int *lbr_ctl_map; /* LBR_CTL mappings */ 863 }; 864 bool lbr_double_abort; /* duplicated lbr aborts */ 865 bool lbr_pt_coexist; /* (LBR|BTS) may coexist with PT */ 866 867 unsigned int lbr_has_info:1; 868 unsigned int lbr_has_tsx:1; 869 unsigned int lbr_from_flags:1; 870 unsigned int lbr_to_cycles:1; 871 872 /* 873 * Intel Architectural LBR CPUID Enumeration 874 */ 875 unsigned int lbr_depth_mask:8; 876 unsigned int lbr_deep_c_reset:1; 877 unsigned int lbr_lip:1; 878 unsigned int lbr_cpl:1; 879 unsigned int lbr_filter:1; 880 unsigned int lbr_call_stack:1; 881 unsigned int lbr_mispred:1; 882 unsigned int lbr_timed_lbr:1; 883 unsigned int lbr_br_type:1; 884 885 void (*lbr_reset)(void); 886 void (*lbr_read)(struct cpu_hw_events *cpuc); 887 void (*lbr_save)(void *ctx); 888 void (*lbr_restore)(void *ctx); 889 890 /* 891 * Intel PT/LBR/BTS are exclusive 892 */ 893 atomic_t lbr_exclusive[x86_lbr_exclusive_max]; 894 895 /* 896 * Intel perf metrics 897 */ 898 int num_topdown_events; 899 900 /* 901 * perf task context (i.e. struct perf_event_pmu_context::task_ctx_data) 902 * switch helper to bridge calls from perf/core to perf/x86. 903 * See struct pmu::swap_task_ctx() usage for examples; 904 */ 905 void (*swap_task_ctx)(struct perf_event_pmu_context *prev_epc, 906 struct perf_event_pmu_context *next_epc); 907 908 /* 909 * AMD bits 910 */ 911 unsigned int amd_nb_constraints : 1; 912 u64 perf_ctr_pair_en; 913 914 /* 915 * Extra registers for events 916 */ 917 struct extra_reg *extra_regs; 918 unsigned int flags; 919 920 /* 921 * Intel host/guest support (KVM) 922 */ 923 struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr, void *data); 924 925 /* 926 * Check period value for PERF_EVENT_IOC_PERIOD ioctl. 927 */ 928 int (*check_period) (struct perf_event *event, u64 period); 929 930 int (*aux_output_match) (struct perf_event *event); 931 932 void (*filter)(struct pmu *pmu, int cpu, bool *ret); 933 /* 934 * Hybrid support 935 * 936 * Most PMU capabilities are the same among different hybrid PMUs. 937 * The global x86_pmu saves the architecture capabilities, which 938 * are available for all PMUs. The hybrid_pmu only includes the 939 * unique capabilities. 940 */ 941 int num_hybrid_pmus; 942 struct x86_hybrid_pmu *hybrid_pmu; 943 u8 (*get_hybrid_cpu_type) (void); 944 }; 945 946 struct x86_perf_task_context_opt { 947 int lbr_callstack_users; 948 int lbr_stack_state; 949 int log_id; 950 }; 951 952 struct x86_perf_task_context { 953 u64 lbr_sel; 954 int tos; 955 int valid_lbrs; 956 struct x86_perf_task_context_opt opt; 957 struct lbr_entry lbr[MAX_LBR_ENTRIES]; 958 }; 959 960 struct x86_perf_task_context_arch_lbr { 961 struct x86_perf_task_context_opt opt; 962 struct lbr_entry entries[]; 963 }; 964 965 /* 966 * Add padding to guarantee the 64-byte alignment of the state buffer. 967 * 968 * The structure is dynamically allocated. The size of the LBR state may vary 969 * based on the number of LBR registers. 970 * 971 * Do not put anything after the LBR state. 972 */ 973 struct x86_perf_task_context_arch_lbr_xsave { 974 struct x86_perf_task_context_opt opt; 975 976 union { 977 struct xregs_state xsave; 978 struct { 979 struct fxregs_state i387; 980 struct xstate_header header; 981 struct arch_lbr_state lbr; 982 } __attribute__ ((packed, aligned (XSAVE_ALIGNMENT))); 983 }; 984 }; 985 986 #define x86_add_quirk(func_) \ 987 do { \ 988 static struct x86_pmu_quirk __quirk __initdata = { \ 989 .func = func_, \ 990 }; \ 991 __quirk.next = x86_pmu.quirks; \ 992 x86_pmu.quirks = &__quirk; \ 993 } while (0) 994 995 /* 996 * x86_pmu flags 997 */ 998 #define PMU_FL_NO_HT_SHARING 0x1 /* no hyper-threading resource sharing */ 999 #define PMU_FL_HAS_RSP_1 0x2 /* has 2 equivalent offcore_rsp regs */ 1000 #define PMU_FL_EXCL_CNTRS 0x4 /* has exclusive counter requirements */ 1001 #define PMU_FL_EXCL_ENABLED 0x8 /* exclusive counter active */ 1002 #define PMU_FL_PEBS_ALL 0x10 /* all events are valid PEBS events */ 1003 #define PMU_FL_TFA 0x20 /* deal with TSX force abort */ 1004 #define PMU_FL_PAIR 0x40 /* merge counters for large incr. events */ 1005 #define PMU_FL_INSTR_LATENCY 0x80 /* Support Instruction Latency in PEBS Memory Info Record */ 1006 #define PMU_FL_MEM_LOADS_AUX 0x100 /* Require an auxiliary event for the complete memory info */ 1007 #define PMU_FL_RETIRE_LATENCY 0x200 /* Support Retire Latency in PEBS */ 1008 1009 #define EVENT_VAR(_id) event_attr_##_id 1010 #define EVENT_PTR(_id) &event_attr_##_id.attr.attr 1011 1012 #define EVENT_ATTR(_name, _id) \ 1013 static struct perf_pmu_events_attr EVENT_VAR(_id) = { \ 1014 .attr = __ATTR(_name, 0444, events_sysfs_show, NULL), \ 1015 .id = PERF_COUNT_HW_##_id, \ 1016 .event_str = NULL, \ 1017 }; 1018 1019 #define EVENT_ATTR_STR(_name, v, str) \ 1020 static struct perf_pmu_events_attr event_attr_##v = { \ 1021 .attr = __ATTR(_name, 0444, events_sysfs_show, NULL), \ 1022 .id = 0, \ 1023 .event_str = str, \ 1024 }; 1025 1026 #define EVENT_ATTR_STR_HT(_name, v, noht, ht) \ 1027 static struct perf_pmu_events_ht_attr event_attr_##v = { \ 1028 .attr = __ATTR(_name, 0444, events_ht_sysfs_show, NULL),\ 1029 .id = 0, \ 1030 .event_str_noht = noht, \ 1031 .event_str_ht = ht, \ 1032 } 1033 1034 #define EVENT_ATTR_STR_HYBRID(_name, v, str, _pmu) \ 1035 static struct perf_pmu_events_hybrid_attr event_attr_##v = { \ 1036 .attr = __ATTR(_name, 0444, events_hybrid_sysfs_show, NULL),\ 1037 .id = 0, \ 1038 .event_str = str, \ 1039 .pmu_type = _pmu, \ 1040 } 1041 1042 #define FORMAT_HYBRID_PTR(_id) (&format_attr_hybrid_##_id.attr.attr) 1043 1044 #define FORMAT_ATTR_HYBRID(_name, _pmu) \ 1045 static struct perf_pmu_format_hybrid_attr format_attr_hybrid_##_name = {\ 1046 .attr = __ATTR_RO(_name), \ 1047 .pmu_type = _pmu, \ 1048 } 1049 1050 struct pmu *x86_get_pmu(unsigned int cpu); 1051 extern struct x86_pmu x86_pmu __read_mostly; 1052 1053 DECLARE_STATIC_CALL(x86_pmu_set_period, *x86_pmu.set_period); 1054 DECLARE_STATIC_CALL(x86_pmu_update, *x86_pmu.update); 1055 1056 static __always_inline struct x86_perf_task_context_opt *task_context_opt(void *ctx) 1057 { 1058 if (static_cpu_has(X86_FEATURE_ARCH_LBR)) 1059 return &((struct x86_perf_task_context_arch_lbr *)ctx)->opt; 1060 1061 return &((struct x86_perf_task_context *)ctx)->opt; 1062 } 1063 1064 static inline bool x86_pmu_has_lbr_callstack(void) 1065 { 1066 return x86_pmu.lbr_sel_map && 1067 x86_pmu.lbr_sel_map[PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT] > 0; 1068 } 1069 1070 DECLARE_PER_CPU(struct cpu_hw_events, cpu_hw_events); 1071 DECLARE_PER_CPU(u64 [X86_PMC_IDX_MAX], pmc_prev_left); 1072 1073 int x86_perf_event_set_period(struct perf_event *event); 1074 1075 /* 1076 * Generalized hw caching related hw_event table, filled 1077 * in on a per model basis. A value of 0 means 1078 * 'not supported', -1 means 'hw_event makes no sense on 1079 * this CPU', any other value means the raw hw_event 1080 * ID. 1081 */ 1082 1083 #define C(x) PERF_COUNT_HW_CACHE_##x 1084 1085 extern u64 __read_mostly hw_cache_event_ids 1086 [PERF_COUNT_HW_CACHE_MAX] 1087 [PERF_COUNT_HW_CACHE_OP_MAX] 1088 [PERF_COUNT_HW_CACHE_RESULT_MAX]; 1089 extern u64 __read_mostly hw_cache_extra_regs 1090 [PERF_COUNT_HW_CACHE_MAX] 1091 [PERF_COUNT_HW_CACHE_OP_MAX] 1092 [PERF_COUNT_HW_CACHE_RESULT_MAX]; 1093 1094 u64 x86_perf_event_update(struct perf_event *event); 1095 1096 static inline unsigned int x86_pmu_config_addr(int index) 1097 { 1098 return x86_pmu.eventsel + (x86_pmu.addr_offset ? 1099 x86_pmu.addr_offset(index, true) : index); 1100 } 1101 1102 static inline unsigned int x86_pmu_event_addr(int index) 1103 { 1104 return x86_pmu.perfctr + (x86_pmu.addr_offset ? 1105 x86_pmu.addr_offset(index, false) : index); 1106 } 1107 1108 static inline int x86_pmu_rdpmc_index(int index) 1109 { 1110 return x86_pmu.rdpmc_index ? x86_pmu.rdpmc_index(index) : index; 1111 } 1112 1113 bool check_hw_exists(struct pmu *pmu, int num_counters, 1114 int num_counters_fixed); 1115 1116 int x86_add_exclusive(unsigned int what); 1117 1118 void x86_del_exclusive(unsigned int what); 1119 1120 int x86_reserve_hardware(void); 1121 1122 void x86_release_hardware(void); 1123 1124 int x86_pmu_max_precise(void); 1125 1126 void hw_perf_lbr_event_destroy(struct perf_event *event); 1127 1128 int x86_setup_perfctr(struct perf_event *event); 1129 1130 int x86_pmu_hw_config(struct perf_event *event); 1131 1132 void x86_pmu_disable_all(void); 1133 1134 static inline bool has_amd_brs(struct hw_perf_event *hwc) 1135 { 1136 return hwc->flags & PERF_X86_EVENT_AMD_BRS; 1137 } 1138 1139 static inline bool is_counter_pair(struct hw_perf_event *hwc) 1140 { 1141 return hwc->flags & PERF_X86_EVENT_PAIR; 1142 } 1143 1144 static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc, 1145 u64 enable_mask) 1146 { 1147 u64 disable_mask = __this_cpu_read(cpu_hw_events.perf_ctr_virt_mask); 1148 1149 if (hwc->extra_reg.reg) 1150 wrmsrl(hwc->extra_reg.reg, hwc->extra_reg.config); 1151 1152 /* 1153 * Add enabled Merge event on next counter 1154 * if large increment event being enabled on this counter 1155 */ 1156 if (is_counter_pair(hwc)) 1157 wrmsrl(x86_pmu_config_addr(hwc->idx + 1), x86_pmu.perf_ctr_pair_en); 1158 1159 wrmsrl(hwc->config_base, (hwc->config | enable_mask) & ~disable_mask); 1160 } 1161 1162 void x86_pmu_enable_all(int added); 1163 1164 int perf_assign_events(struct event_constraint **constraints, int n, 1165 int wmin, int wmax, int gpmax, int *assign); 1166 int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign); 1167 1168 void x86_pmu_stop(struct perf_event *event, int flags); 1169 1170 static inline void x86_pmu_disable_event(struct perf_event *event) 1171 { 1172 u64 disable_mask = __this_cpu_read(cpu_hw_events.perf_ctr_virt_mask); 1173 struct hw_perf_event *hwc = &event->hw; 1174 1175 wrmsrl(hwc->config_base, hwc->config & ~disable_mask); 1176 1177 if (is_counter_pair(hwc)) 1178 wrmsrl(x86_pmu_config_addr(hwc->idx + 1), 0); 1179 } 1180 1181 void x86_pmu_enable_event(struct perf_event *event); 1182 1183 int x86_pmu_handle_irq(struct pt_regs *regs); 1184 1185 void x86_pmu_show_pmu_cap(int num_counters, int num_counters_fixed, 1186 u64 intel_ctrl); 1187 1188 extern struct event_constraint emptyconstraint; 1189 1190 extern struct event_constraint unconstrained; 1191 1192 static inline bool kernel_ip(unsigned long ip) 1193 { 1194 #ifdef CONFIG_X86_32 1195 return ip > PAGE_OFFSET; 1196 #else 1197 return (long)ip < 0; 1198 #endif 1199 } 1200 1201 /* 1202 * Not all PMUs provide the right context information to place the reported IP 1203 * into full context. Specifically segment registers are typically not 1204 * supplied. 1205 * 1206 * Assuming the address is a linear address (it is for IBS), we fake the CS and 1207 * vm86 mode using the known zero-based code segment and 'fix up' the registers 1208 * to reflect this. 1209 * 1210 * Intel PEBS/LBR appear to typically provide the effective address, nothing 1211 * much we can do about that but pray and treat it like a linear address. 1212 */ 1213 static inline void set_linear_ip(struct pt_regs *regs, unsigned long ip) 1214 { 1215 regs->cs = kernel_ip(ip) ? __KERNEL_CS : __USER_CS; 1216 if (regs->flags & X86_VM_MASK) 1217 regs->flags ^= (PERF_EFLAGS_VM | X86_VM_MASK); 1218 regs->ip = ip; 1219 } 1220 1221 /* 1222 * x86control flow change classification 1223 * x86control flow changes include branches, interrupts, traps, faults 1224 */ 1225 enum { 1226 X86_BR_NONE = 0, /* unknown */ 1227 1228 X86_BR_USER = 1 << 0, /* branch target is user */ 1229 X86_BR_KERNEL = 1 << 1, /* branch target is kernel */ 1230 1231 X86_BR_CALL = 1 << 2, /* call */ 1232 X86_BR_RET = 1 << 3, /* return */ 1233 X86_BR_SYSCALL = 1 << 4, /* syscall */ 1234 X86_BR_SYSRET = 1 << 5, /* syscall return */ 1235 X86_BR_INT = 1 << 6, /* sw interrupt */ 1236 X86_BR_IRET = 1 << 7, /* return from interrupt */ 1237 X86_BR_JCC = 1 << 8, /* conditional */ 1238 X86_BR_JMP = 1 << 9, /* jump */ 1239 X86_BR_IRQ = 1 << 10,/* hw interrupt or trap or fault */ 1240 X86_BR_IND_CALL = 1 << 11,/* indirect calls */ 1241 X86_BR_ABORT = 1 << 12,/* transaction abort */ 1242 X86_BR_IN_TX = 1 << 13,/* in transaction */ 1243 X86_BR_NO_TX = 1 << 14,/* not in transaction */ 1244 X86_BR_ZERO_CALL = 1 << 15,/* zero length call */ 1245 X86_BR_CALL_STACK = 1 << 16,/* call stack */ 1246 X86_BR_IND_JMP = 1 << 17,/* indirect jump */ 1247 1248 X86_BR_TYPE_SAVE = 1 << 18,/* indicate to save branch type */ 1249 1250 }; 1251 1252 #define X86_BR_PLM (X86_BR_USER | X86_BR_KERNEL) 1253 #define X86_BR_ANYTX (X86_BR_NO_TX | X86_BR_IN_TX) 1254 1255 #define X86_BR_ANY \ 1256 (X86_BR_CALL |\ 1257 X86_BR_RET |\ 1258 X86_BR_SYSCALL |\ 1259 X86_BR_SYSRET |\ 1260 X86_BR_INT |\ 1261 X86_BR_IRET |\ 1262 X86_BR_JCC |\ 1263 X86_BR_JMP |\ 1264 X86_BR_IRQ |\ 1265 X86_BR_ABORT |\ 1266 X86_BR_IND_CALL |\ 1267 X86_BR_IND_JMP |\ 1268 X86_BR_ZERO_CALL) 1269 1270 #define X86_BR_ALL (X86_BR_PLM | X86_BR_ANY) 1271 1272 #define X86_BR_ANY_CALL \ 1273 (X86_BR_CALL |\ 1274 X86_BR_IND_CALL |\ 1275 X86_BR_ZERO_CALL |\ 1276 X86_BR_SYSCALL |\ 1277 X86_BR_IRQ |\ 1278 X86_BR_INT) 1279 1280 int common_branch_type(int type); 1281 int branch_type(unsigned long from, unsigned long to, int abort); 1282 int branch_type_fused(unsigned long from, unsigned long to, int abort, 1283 int *offset); 1284 1285 ssize_t x86_event_sysfs_show(char *page, u64 config, u64 event); 1286 ssize_t intel_event_sysfs_show(char *page, u64 config); 1287 1288 ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr, 1289 char *page); 1290 ssize_t events_ht_sysfs_show(struct device *dev, struct device_attribute *attr, 1291 char *page); 1292 ssize_t events_hybrid_sysfs_show(struct device *dev, 1293 struct device_attribute *attr, 1294 char *page); 1295 1296 static inline bool fixed_counter_disabled(int i, struct pmu *pmu) 1297 { 1298 u64 intel_ctrl = hybrid(pmu, intel_ctrl); 1299 1300 return !(intel_ctrl >> (i + INTEL_PMC_IDX_FIXED)); 1301 } 1302 1303 #ifdef CONFIG_CPU_SUP_AMD 1304 1305 int amd_pmu_init(void); 1306 1307 int amd_pmu_lbr_init(void); 1308 void amd_pmu_lbr_reset(void); 1309 void amd_pmu_lbr_read(void); 1310 void amd_pmu_lbr_add(struct perf_event *event); 1311 void amd_pmu_lbr_del(struct perf_event *event); 1312 void amd_pmu_lbr_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched_in); 1313 void amd_pmu_lbr_enable_all(void); 1314 void amd_pmu_lbr_disable_all(void); 1315 int amd_pmu_lbr_hw_config(struct perf_event *event); 1316 1317 #ifdef CONFIG_PERF_EVENTS_AMD_BRS 1318 1319 #define AMD_FAM19H_BRS_EVENT 0xc4 /* RETIRED_TAKEN_BRANCH_INSTRUCTIONS */ 1320 1321 int amd_brs_init(void); 1322 void amd_brs_disable(void); 1323 void amd_brs_enable(void); 1324 void amd_brs_enable_all(void); 1325 void amd_brs_disable_all(void); 1326 void amd_brs_drain(void); 1327 void amd_brs_lopwr_init(void); 1328 int amd_brs_hw_config(struct perf_event *event); 1329 void amd_brs_reset(void); 1330 1331 static inline void amd_pmu_brs_add(struct perf_event *event) 1332 { 1333 struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); 1334 1335 perf_sched_cb_inc(event->pmu); 1336 cpuc->lbr_users++; 1337 /* 1338 * No need to reset BRS because it is reset 1339 * on brs_enable() and it is saturating 1340 */ 1341 } 1342 1343 static inline void amd_pmu_brs_del(struct perf_event *event) 1344 { 1345 struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); 1346 1347 cpuc->lbr_users--; 1348 WARN_ON_ONCE(cpuc->lbr_users < 0); 1349 1350 perf_sched_cb_dec(event->pmu); 1351 } 1352 1353 void amd_pmu_brs_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched_in); 1354 #else 1355 static inline int amd_brs_init(void) 1356 { 1357 return 0; 1358 } 1359 static inline void amd_brs_disable(void) {} 1360 static inline void amd_brs_enable(void) {} 1361 static inline void amd_brs_drain(void) {} 1362 static inline void amd_brs_lopwr_init(void) {} 1363 static inline void amd_brs_disable_all(void) {} 1364 static inline int amd_brs_hw_config(struct perf_event *event) 1365 { 1366 return 0; 1367 } 1368 static inline void amd_brs_reset(void) {} 1369 1370 static inline void amd_pmu_brs_add(struct perf_event *event) 1371 { 1372 } 1373 1374 static inline void amd_pmu_brs_del(struct perf_event *event) 1375 { 1376 } 1377 1378 static inline void amd_pmu_brs_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched_in) 1379 { 1380 } 1381 1382 static inline void amd_brs_enable_all(void) 1383 { 1384 } 1385 1386 #endif 1387 1388 #else /* CONFIG_CPU_SUP_AMD */ 1389 1390 static inline int amd_pmu_init(void) 1391 { 1392 return 0; 1393 } 1394 1395 static inline int amd_brs_init(void) 1396 { 1397 return -EOPNOTSUPP; 1398 } 1399 1400 static inline void amd_brs_drain(void) 1401 { 1402 } 1403 1404 static inline void amd_brs_enable_all(void) 1405 { 1406 } 1407 1408 static inline void amd_brs_disable_all(void) 1409 { 1410 } 1411 #endif /* CONFIG_CPU_SUP_AMD */ 1412 1413 static inline int is_pebs_pt(struct perf_event *event) 1414 { 1415 return !!(event->hw.flags & PERF_X86_EVENT_PEBS_VIA_PT); 1416 } 1417 1418 #ifdef CONFIG_CPU_SUP_INTEL 1419 1420 static inline bool intel_pmu_has_bts_period(struct perf_event *event, u64 period) 1421 { 1422 struct hw_perf_event *hwc = &event->hw; 1423 unsigned int hw_event, bts_event; 1424 1425 if (event->attr.freq) 1426 return false; 1427 1428 hw_event = hwc->config & INTEL_ARCH_EVENT_MASK; 1429 bts_event = x86_pmu.event_map(PERF_COUNT_HW_BRANCH_INSTRUCTIONS); 1430 1431 return hw_event == bts_event && period == 1; 1432 } 1433 1434 static inline bool intel_pmu_has_bts(struct perf_event *event) 1435 { 1436 struct hw_perf_event *hwc = &event->hw; 1437 1438 return intel_pmu_has_bts_period(event, hwc->sample_period); 1439 } 1440 1441 static __always_inline void __intel_pmu_pebs_disable_all(void) 1442 { 1443 wrmsrl(MSR_IA32_PEBS_ENABLE, 0); 1444 } 1445 1446 static __always_inline void __intel_pmu_arch_lbr_disable(void) 1447 { 1448 wrmsrl(MSR_ARCH_LBR_CTL, 0); 1449 } 1450 1451 static __always_inline void __intel_pmu_lbr_disable(void) 1452 { 1453 u64 debugctl; 1454 1455 rdmsrl(MSR_IA32_DEBUGCTLMSR, debugctl); 1456 debugctl &= ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_FREEZE_LBRS_ON_PMI); 1457 wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctl); 1458 } 1459 1460 int intel_pmu_save_and_restart(struct perf_event *event); 1461 1462 struct event_constraint * 1463 x86_get_event_constraints(struct cpu_hw_events *cpuc, int idx, 1464 struct perf_event *event); 1465 1466 extern int intel_cpuc_prepare(struct cpu_hw_events *cpuc, int cpu); 1467 extern void intel_cpuc_finish(struct cpu_hw_events *cpuc); 1468 1469 int intel_pmu_init(void); 1470 1471 void init_debug_store_on_cpu(int cpu); 1472 1473 void fini_debug_store_on_cpu(int cpu); 1474 1475 void release_ds_buffers(void); 1476 1477 void reserve_ds_buffers(void); 1478 1479 void release_lbr_buffers(void); 1480 1481 void reserve_lbr_buffers(void); 1482 1483 extern struct event_constraint bts_constraint; 1484 extern struct event_constraint vlbr_constraint; 1485 1486 void intel_pmu_enable_bts(u64 config); 1487 1488 void intel_pmu_disable_bts(void); 1489 1490 int intel_pmu_drain_bts_buffer(void); 1491 1492 u64 adl_latency_data_small(struct perf_event *event, u64 status); 1493 1494 u64 mtl_latency_data_small(struct perf_event *event, u64 status); 1495 1496 extern struct event_constraint intel_core2_pebs_event_constraints[]; 1497 1498 extern struct event_constraint intel_atom_pebs_event_constraints[]; 1499 1500 extern struct event_constraint intel_slm_pebs_event_constraints[]; 1501 1502 extern struct event_constraint intel_glm_pebs_event_constraints[]; 1503 1504 extern struct event_constraint intel_glp_pebs_event_constraints[]; 1505 1506 extern struct event_constraint intel_grt_pebs_event_constraints[]; 1507 1508 extern struct event_constraint intel_nehalem_pebs_event_constraints[]; 1509 1510 extern struct event_constraint intel_westmere_pebs_event_constraints[]; 1511 1512 extern struct event_constraint intel_snb_pebs_event_constraints[]; 1513 1514 extern struct event_constraint intel_ivb_pebs_event_constraints[]; 1515 1516 extern struct event_constraint intel_hsw_pebs_event_constraints[]; 1517 1518 extern struct event_constraint intel_bdw_pebs_event_constraints[]; 1519 1520 extern struct event_constraint intel_skl_pebs_event_constraints[]; 1521 1522 extern struct event_constraint intel_icl_pebs_event_constraints[]; 1523 1524 extern struct event_constraint intel_spr_pebs_event_constraints[]; 1525 1526 struct event_constraint *intel_pebs_constraints(struct perf_event *event); 1527 1528 void intel_pmu_pebs_add(struct perf_event *event); 1529 1530 void intel_pmu_pebs_del(struct perf_event *event); 1531 1532 void intel_pmu_pebs_enable(struct perf_event *event); 1533 1534 void intel_pmu_pebs_disable(struct perf_event *event); 1535 1536 void intel_pmu_pebs_enable_all(void); 1537 1538 void intel_pmu_pebs_disable_all(void); 1539 1540 void intel_pmu_pebs_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched_in); 1541 1542 void intel_pmu_auto_reload_read(struct perf_event *event); 1543 1544 void intel_pmu_store_pebs_lbrs(struct lbr_entry *lbr); 1545 1546 void intel_ds_init(void); 1547 1548 void intel_pmu_lbr_swap_task_ctx(struct perf_event_pmu_context *prev_epc, 1549 struct perf_event_pmu_context *next_epc); 1550 1551 void intel_pmu_lbr_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched_in); 1552 1553 u64 lbr_from_signext_quirk_wr(u64 val); 1554 1555 void intel_pmu_lbr_reset(void); 1556 1557 void intel_pmu_lbr_reset_32(void); 1558 1559 void intel_pmu_lbr_reset_64(void); 1560 1561 void intel_pmu_lbr_add(struct perf_event *event); 1562 1563 void intel_pmu_lbr_del(struct perf_event *event); 1564 1565 void intel_pmu_lbr_enable_all(bool pmi); 1566 1567 void intel_pmu_lbr_disable_all(void); 1568 1569 void intel_pmu_lbr_read(void); 1570 1571 void intel_pmu_lbr_read_32(struct cpu_hw_events *cpuc); 1572 1573 void intel_pmu_lbr_read_64(struct cpu_hw_events *cpuc); 1574 1575 void intel_pmu_lbr_save(void *ctx); 1576 1577 void intel_pmu_lbr_restore(void *ctx); 1578 1579 void intel_pmu_lbr_init_core(void); 1580 1581 void intel_pmu_lbr_init_nhm(void); 1582 1583 void intel_pmu_lbr_init_atom(void); 1584 1585 void intel_pmu_lbr_init_slm(void); 1586 1587 void intel_pmu_lbr_init_snb(void); 1588 1589 void intel_pmu_lbr_init_hsw(void); 1590 1591 void intel_pmu_lbr_init_skl(void); 1592 1593 void intel_pmu_lbr_init_knl(void); 1594 1595 void intel_pmu_lbr_init(void); 1596 1597 void intel_pmu_arch_lbr_init(void); 1598 1599 void intel_pmu_pebs_data_source_nhm(void); 1600 1601 void intel_pmu_pebs_data_source_skl(bool pmem); 1602 1603 void intel_pmu_pebs_data_source_adl(void); 1604 1605 void intel_pmu_pebs_data_source_grt(void); 1606 1607 void intel_pmu_pebs_data_source_mtl(void); 1608 1609 void intel_pmu_pebs_data_source_cmt(void); 1610 1611 int intel_pmu_setup_lbr_filter(struct perf_event *event); 1612 1613 void intel_pt_interrupt(void); 1614 1615 int intel_bts_interrupt(void); 1616 1617 void intel_bts_enable_local(void); 1618 1619 void intel_bts_disable_local(void); 1620 1621 int p4_pmu_init(void); 1622 1623 int p6_pmu_init(void); 1624 1625 int knc_pmu_init(void); 1626 1627 static inline int is_ht_workaround_enabled(void) 1628 { 1629 return !!(x86_pmu.flags & PMU_FL_EXCL_ENABLED); 1630 } 1631 1632 #else /* CONFIG_CPU_SUP_INTEL */ 1633 1634 static inline void reserve_ds_buffers(void) 1635 { 1636 } 1637 1638 static inline void release_ds_buffers(void) 1639 { 1640 } 1641 1642 static inline void release_lbr_buffers(void) 1643 { 1644 } 1645 1646 static inline void reserve_lbr_buffers(void) 1647 { 1648 } 1649 1650 static inline int intel_pmu_init(void) 1651 { 1652 return 0; 1653 } 1654 1655 static inline int intel_cpuc_prepare(struct cpu_hw_events *cpuc, int cpu) 1656 { 1657 return 0; 1658 } 1659 1660 static inline void intel_cpuc_finish(struct cpu_hw_events *cpuc) 1661 { 1662 } 1663 1664 static inline int is_ht_workaround_enabled(void) 1665 { 1666 return 0; 1667 } 1668 #endif /* CONFIG_CPU_SUP_INTEL */ 1669 1670 #if ((defined CONFIG_CPU_SUP_CENTAUR) || (defined CONFIG_CPU_SUP_ZHAOXIN)) 1671 int zhaoxin_pmu_init(void); 1672 #else 1673 static inline int zhaoxin_pmu_init(void) 1674 { 1675 return 0; 1676 } 1677 #endif /*CONFIG_CPU_SUP_CENTAUR or CONFIG_CPU_SUP_ZHAOXIN*/ 1678