arch/x86/kernel/cpu/perf_event.h

   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 <pzijlstr@redhat.com>
   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 #if 0
  18 #undef wrmsrl
  19 #define wrmsrl(msr, val)                                                \
  20 do {                                                                    \
  21         unsigned int _msr = (msr);                                      \
  22         u64 _val = (val);                                               \
  23         trace_printk("wrmsrl(%x, %Lx)\n", (unsigned int)(_msr),         \
  24                         (unsigned long long)(_val));                    \
  25         native_write_msr((_msr), (u32)(_val), (u32)(_val >> 32));       \
  26 } while (0)
  27 #endif
  28
  29 /*
  30  *          |   NHM/WSM    |      SNB     |
  31  * register -------------------------------
  32  *          |  HT  | no HT |  HT  | no HT |
  33  *-----------------------------------------
  34  * offcore  | core | core  | cpu  | core  |
  35  * lbr_sel  | core | core  | cpu  | core  |
  36  * ld_lat   | cpu  | core  | cpu  | core  |
  37  *-----------------------------------------
  38  *
  39  * Given that there is a small number of shared regs,
  40  * we can pre-allocate their slot in the per-cpu
  41  * per-core reg tables.
  42  */
  43 enum extra_reg_type {
  44         EXTRA_REG_NONE  = -1,   /* not used */
  45
  46         EXTRA_REG_RSP_0 = 0,    /* offcore_response_0 */
  47         EXTRA_REG_RSP_1 = 1,    /* offcore_response_1 */
  48         EXTRA_REG_LBR   = 2,    /* lbr_select */
  49         EXTRA_REG_LDLAT = 3,    /* ld_lat_threshold */
  50
  51         EXTRA_REG_MAX           /* number of entries needed */
  52 };
  53
  54 struct event_constraint {
  55         union {
  56                 unsigned long   idxmsk[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
  57                 u64             idxmsk64;
  58         };
  59         u64     code;
  60         u64     cmask;
  61         int     weight;
  62         int     overlap;
  63         int     flags;
  64 };
  65 /*
  66  * struct hw_perf_event.flags flags
  67  */
  68 #define PERF_X86_EVENT_PEBS_LDLAT       0x1 /* ld+ldlat data address sampling */
  69 #define PERF_X86_EVENT_PEBS_ST          0x2 /* st data address sampling */
  70 #define PERF_X86_EVENT_PEBS_ST_HSW      0x4 /* haswell style st data sampling */
  71 #define PERF_X86_EVENT_COMMITTED        0x8 /* event passed commit_txn */
  72
  73 struct amd_nb {
  74         int nb_id;  /* NorthBridge id */
  75         int refcnt; /* reference count */
  76         struct perf_event *owners[X86_PMC_IDX_MAX];
  77         struct event_constraint event_constraints[X86_PMC_IDX_MAX];
  78 };
  79
  80 /* The maximal number of PEBS events: */
  81 #define MAX_PEBS_EVENTS         8
  82
  83 /*
  84  * A debug store configuration.
  85  *
  86  * We only support architectures that use 64bit fields.
  87  */
  88 struct debug_store {
  89         u64     bts_buffer_base;
  90         u64     bts_index;
  91         u64     bts_absolute_maximum;
  92         u64     bts_interrupt_threshold;
  93         u64     pebs_buffer_base;
  94         u64     pebs_index;
  95         u64     pebs_absolute_maximum;
  96         u64     pebs_interrupt_threshold;
  97         u64     pebs_event_reset[MAX_PEBS_EVENTS];
  98 };
  99
 100 /*
 101  * Per register state.
 102  */
 103 struct er_account {
 104         raw_spinlock_t          lock;   /* per-core: protect structure */
 105         u64                 config;     /* extra MSR config */
 106         u64                 reg;        /* extra MSR number */
 107         atomic_t            ref;        /* reference count */
 108 };
 109
 110 /*
 111  * Per core/cpu state
 112  *
 113  * Used to coordinate shared registers between HT threads or
 114  * among events on a single PMU.
 115  */
 116 struct intel_shared_regs {
 117         struct er_account       regs[EXTRA_REG_MAX];
 118         int                     refcnt;         /* per-core: #HT threads */
 119         unsigned                core_id;        /* per-core: core id */
 120 };
 121
 122 #define MAX_LBR_ENTRIES         16
 123
 124 struct cpu_hw_events {
 125         /*
 126          * Generic x86 PMC bits
 127          */
 128         struct perf_event       *events[X86_PMC_IDX_MAX]; /* in counter order */
 129         unsigned long           active_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
 130         unsigned long           running[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
 131         int                     enabled;
 132
 133         int                     n_events; /* the # of events in the below arrays */
 134         int                     n_added;  /* the # last events in the below arrays;
 135                                              they've never been enabled yet */
 136         int                     n_txn;    /* the # last events in the below arrays;
 137                                              added in the current transaction */
 138         int                     assign[X86_PMC_IDX_MAX]; /* event to counter assignment */
 139         u64                     tags[X86_PMC_IDX_MAX];
 140         struct perf_event       *event_list[X86_PMC_IDX_MAX]; /* in enabled order */
 141
 142         unsigned int            group_flag;
 143         int                     is_fake;
 144
 145         /*
 146          * Intel DebugStore bits
 147          */
 148         struct debug_store      *ds;
 149         u64                     pebs_enabled;
 150
 151         /*
 152          * Intel LBR bits
 153          */
 154         int                             lbr_users;
 155         void                            *lbr_context;
 156         struct perf_branch_stack        lbr_stack;
 157         struct perf_branch_entry        lbr_entries[MAX_LBR_ENTRIES];
 158         struct er_account               *lbr_sel;
 159         u64                             br_sel;
 160
 161         /*
 162          * Intel host/guest exclude bits
 163          */
 164         u64                             intel_ctrl_guest_mask;
 165         u64                             intel_ctrl_host_mask;
 166         struct perf_guest_switch_msr    guest_switch_msrs[X86_PMC_IDX_MAX];
 167
 168         /*
 169          * Intel checkpoint mask
 170          */
 171         u64                             intel_cp_status;
 172
 173         /*
 174          * manage shared (per-core, per-cpu) registers
 175          * used on Intel NHM/WSM/SNB
 176          */
 177         struct intel_shared_regs        *shared_regs;
 178
 179         /*
 180          * AMD specific bits
 181          */
 182         struct amd_nb                   *amd_nb;
 183         /* Inverted mask of bits to clear in the perf_ctr ctrl registers */
 184         u64                             perf_ctr_virt_mask;
 185
 186         void                            *kfree_on_online;
 187 };
 188
 189 #define __EVENT_CONSTRAINT(c, n, m, w, o, f) {\
 190         { .idxmsk64 = (n) },            \
 191         .code = (c),                    \
 192         .cmask = (m),                   \
 193         .weight = (w),                  \
 194         .overlap = (o),                 \
 195         .flags = f,                     \
 196 }
 197
 198 #define EVENT_CONSTRAINT(c, n, m)       \
 199         __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 0, 0)
 200
 201 /*
 202  * The overlap flag marks event constraints with overlapping counter
 203  * masks. This is the case if the counter mask of such an event is not
 204  * a subset of any other counter mask of a constraint with an equal or
 205  * higher weight, e.g.:
 206  *
 207  *  c_overlaps = EVENT_CONSTRAINT_OVERLAP(0, 0x09, 0);
 208  *  c_another1 = EVENT_CONSTRAINT(0, 0x07, 0);
 209  *  c_another2 = EVENT_CONSTRAINT(0, 0x38, 0);
 210  *
 211  * The event scheduler may not select the correct counter in the first
 212  * cycle because it needs to know which subsequent events will be
 213  * scheduled. It may fail to schedule the events then. So we set the
 214  * overlap flag for such constraints to give the scheduler a hint which
 215  * events to select for counter rescheduling.
 216  *
 217  * Care must be taken as the rescheduling algorithm is O(n!) which
 218  * will increase scheduling cycles for an over-commited system
 219  * dramatically.  The number of such EVENT_CONSTRAINT_OVERLAP() macros
 220  * and its counter masks must be kept at a minimum.
 221  */
 222 #define EVENT_CONSTRAINT_OVERLAP(c, n, m)       \
 223         __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 1, 0)
 224
 225 /*
 226  * Constraint on the Event code.
 227  */
 228 #define INTEL_EVENT_CONSTRAINT(c, n)    \
 229         EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT)
 230
 231 /*
 232  * Constraint on the Event code + UMask + fixed-mask
 233  *
 234  * filter mask to validate fixed counter events.
 235  * the following filters disqualify for fixed counters:
 236  *  - inv
 237  *  - edge
 238  *  - cnt-mask
 239  *  - in_tx
 240  *  - in_tx_checkpointed
 241  *  The other filters are supported by fixed counters.
 242  *  The any-thread option is supported starting with v3.
 243  */
 244 #define FIXED_EVENT_FLAGS (X86_RAW_EVENT_MASK|HSW_IN_TX|HSW_IN_TX_CHECKPOINTED)
 245 #define FIXED_EVENT_CONSTRAINT(c, n)    \
 246         EVENT_CONSTRAINT(c, (1ULL << (32+n)), FIXED_EVENT_FLAGS)
 247
 248 /*
 249  * Constraint on the Event code + UMask
 250  */
 251 #define INTEL_UEVENT_CONSTRAINT(c, n)   \
 252         EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK)
 253
 254 #define INTEL_PLD_CONSTRAINT(c, n)      \
 255         __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK, \
 256                            HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LDLAT)
 257
 258 #define INTEL_PST_CONSTRAINT(c, n)      \
 259         __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK, \
 260                           HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_ST)
 261
 262 /* DataLA version of store sampling without extra enable bit. */
 263 #define INTEL_PST_HSW_CONSTRAINT(c, n)  \
 264         __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK, \
 265                           HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_ST_HSW)
 266
 267 /*
 268  * We define the end marker as having a weight of -1
 269  * to enable blacklisting of events using a counter bitmask
 270  * of zero and thus a weight of zero.
 271  * The end marker has a weight that cannot possibly be
 272  * obtained from counting the bits in the bitmask.
 273  */
 274 #define EVENT_CONSTRAINT_END { .weight = -1 }
 275
 276 /*
 277  * Check for end marker with weight == -1
 278  */
 279 #define for_each_event_constraint(e, c) \
 280         for ((e) = (c); (e)->weight != -1; (e)++)
 281
 282 /*
 283  * Extra registers for specific events.
 284  *
 285  * Some events need large masks and require external MSRs.
 286  * Those extra MSRs end up being shared for all events on
 287  * a PMU and sometimes between PMU of sibling HT threads.
 288  * In either case, the kernel needs to handle conflicting
 289  * accesses to those extra, shared, regs. The data structure
 290  * to manage those registers is stored in cpu_hw_event.
 291  */
 292 struct extra_reg {
 293         unsigned int            event;
 294         unsigned int            msr;
 295         u64                     config_mask;
 296         u64                     valid_mask;
 297         int                     idx;  /* per_xxx->regs[] reg index */
 298 };
 299
 300 #define EVENT_EXTRA_REG(e, ms, m, vm, i) {      \
 301         .event = (e),           \
 302         .msr = (ms),            \
 303         .config_mask = (m),     \
 304         .valid_mask = (vm),     \
 305         .idx = EXTRA_REG_##i,   \
 306         }
 307
 308 #define INTEL_EVENT_EXTRA_REG(event, msr, vm, idx)      \
 309         EVENT_EXTRA_REG(event, msr, ARCH_PERFMON_EVENTSEL_EVENT, vm, idx)
 310
 311 #define INTEL_UEVENT_EXTRA_REG(event, msr, vm, idx) \
 312         EVENT_EXTRA_REG(event, msr, ARCH_PERFMON_EVENTSEL_EVENT | \
 313                         ARCH_PERFMON_EVENTSEL_UMASK, vm, idx)
 314
 315 #define INTEL_UEVENT_PEBS_LDLAT_EXTRA_REG(c) \
 316         INTEL_UEVENT_EXTRA_REG(c, \
 317                                MSR_PEBS_LD_LAT_THRESHOLD, \
 318                                0xffff, \
 319                                LDLAT)
 320
 321 #define EVENT_EXTRA_END EVENT_EXTRA_REG(0, 0, 0, 0, RSP_0)
 322
 323 union perf_capabilities {
 324         struct {
 325                 u64     lbr_format:6;
 326                 u64     pebs_trap:1;
 327                 u64     pebs_arch_reg:1;
 328                 u64     pebs_format:4;
 329                 u64     smm_freeze:1;
 330                 /*
 331                  * PMU supports separate counter range for writing
 332                  * values > 32bit.
 333                  */
 334                 u64     full_width_write:1;
 335         };
 336         u64     capabilities;
 337 };
 338
 339 struct x86_pmu_quirk {
 340         struct x86_pmu_quirk *next;
 341         void (*func)(void);
 342 };
 343
 344 union x86_pmu_config {
 345         struct {
 346                 u64 event:8,
 347                     umask:8,
 348                     usr:1,
 349                     os:1,
 350                     edge:1,
 351                     pc:1,
 352                     interrupt:1,
 353                     __reserved1:1,
 354                     en:1,
 355                     inv:1,
 356                     cmask:8,
 357                     event2:4,
 358                     __reserved2:4,
 359                     go:1,
 360                     ho:1;
 361         } bits;
 362         u64 value;
 363 };
 364
 365 #define X86_CONFIG(args...) ((union x86_pmu_config){.bits = {args}}).value
 366
 367 /*
 368  * struct x86_pmu - generic x86 pmu
 369  */
 370 struct x86_pmu {
 371         /*
 372          * Generic x86 PMC bits
 373          */
 374         const char      *name;
 375         int             version;
 376         int             (*handle_irq)(struct pt_regs *);
 377         void            (*disable_all)(void);
 378         void            (*enable_all)(int added);
 379         void            (*enable)(struct perf_event *);
 380         void            (*disable)(struct perf_event *);
 381         int             (*hw_config)(struct perf_event *event);
 382         int             (*schedule_events)(struct cpu_hw_events *cpuc, int n, int *assign);
 383         unsigned        eventsel;
 384         unsigned        perfctr;
 385         int             (*addr_offset)(int index, bool eventsel);
 386         int             (*rdpmc_index)(int index);
 387         u64             (*event_map)(int);
 388         int             max_events;
 389         int             num_counters;
 390         int             num_counters_fixed;
 391         int             cntval_bits;
 392         u64             cntval_mask;
 393         union {
 394                         unsigned long events_maskl;
 395                         unsigned long events_mask[BITS_TO_LONGS(ARCH_PERFMON_EVENTS_COUNT)];
 396         };
 397         int             events_mask_len;
 398         int             apic;
 399         u64             max_period;
 400         struct event_constraint *
 401                         (*get_event_constraints)(struct cpu_hw_events *cpuc,
 402                                                  struct perf_event *event);
 403
 404         void            (*put_event_constraints)(struct cpu_hw_events *cpuc,
 405                                                  struct perf_event *event);
 406         struct event_constraint *event_constraints;
 407         struct x86_pmu_quirk *quirks;
 408         int             perfctr_second_write;
 409         bool            late_ack;
 410
 411         /*
 412          * sysfs attrs
 413          */
 414         int             attr_rdpmc_broken;
 415         int             attr_rdpmc;
 416         struct attribute **format_attrs;
 417         struct attribute **event_attrs;
 418
 419         ssize_t         (*events_sysfs_show)(char *page, u64 config);
 420         struct attribute **cpu_events;
 421
 422         /*
 423          * CPU Hotplug hooks
 424          */
 425         int             (*cpu_prepare)(int cpu);
 426         void            (*cpu_starting)(int cpu);
 427         void            (*cpu_dying)(int cpu);
 428         void            (*cpu_dead)(int cpu);
 429
 430         void            (*check_microcode)(void);
 431         void            (*flush_branch_stack)(void);
 432
 433         /*
 434          * Intel Arch Perfmon v2+
 435          */
 436         u64                     intel_ctrl;
 437         union perf_capabilities intel_cap;
 438
 439         /*
 440          * Intel DebugStore bits
 441          */
 442         unsigned int    bts             :1,
 443                         bts_active      :1,
 444                         pebs            :1,
 445                         pebs_active     :1,
 446                         pebs_broken     :1;
 447         int             pebs_record_size;
 448         void            (*drain_pebs)(struct pt_regs *regs);
 449         struct event_constraint *pebs_constraints;
 450         void            (*pebs_aliases)(struct perf_event *event);
 451         int             max_pebs_events;
 452
 453         /*
 454          * Intel LBR
 455          */
 456         unsigned long   lbr_tos, lbr_from, lbr_to; /* MSR base regs       */
 457         int             lbr_nr;                    /* hardware stack size */
 458         u64             lbr_sel_mask;              /* LBR_SELECT valid bits */
 459         const int       *lbr_sel_map;              /* lbr_select mappings */
 460         bool            lbr_double_abort;          /* duplicated lbr aborts */
 461
 462         /*
 463          * Extra registers for events
 464          */
 465         struct extra_reg *extra_regs;
 466         unsigned int er_flags;
 467
 468         /*
 469          * Intel host/guest support (KVM)
 470          */
 471         struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr);
 472 };
 473
 474 #define x86_add_quirk(func_)                                            \
 475 do {                                                                    \
 476         static struct x86_pmu_quirk __quirk __initdata = {              \
 477                 .func = func_,                                          \
 478         };                                                              \
 479         __quirk.next = x86_pmu.quirks;                                  \
 480         x86_pmu.quirks = &__quirk;                                      \
 481 } while (0)
 482
 483 #define ERF_NO_HT_SHARING       1
 484 #define ERF_HAS_RSP_1           2
 485
 486 #define EVENT_VAR(_id)  event_attr_##_id
 487 #define EVENT_PTR(_id) &event_attr_##_id.attr.attr
 488
 489 #define EVENT_ATTR(_name, _id)                                          \
 490 static struct perf_pmu_events_attr EVENT_VAR(_id) = {                   \
 491         .attr           = __ATTR(_name, 0444, events_sysfs_show, NULL), \
 492         .id             = PERF_COUNT_HW_##_id,                          \
 493         .event_str      = NULL,                                         \
 494 };
 495
 496 #define EVENT_ATTR_STR(_name, v, str)                                   \
 497 static struct perf_pmu_events_attr event_attr_##v = {                   \
 498         .attr           = __ATTR(_name, 0444, events_sysfs_show, NULL), \
 499         .id             = 0,                                            \
 500         .event_str      = str,                                          \
 501 };
 502
 503 extern struct x86_pmu x86_pmu __read_mostly;
 504
 505 DECLARE_PER_CPU(struct cpu_hw_events, cpu_hw_events);
 506
 507 int x86_perf_event_set_period(struct perf_event *event);
 508
 509 /*
 510  * Generalized hw caching related hw_event table, filled
 511  * in on a per model basis. A value of 0 means
 512  * 'not supported', -1 means 'hw_event makes no sense on
 513  * this CPU', any other value means the raw hw_event
 514  * ID.
 515  */
 516
 517 #define C(x) PERF_COUNT_HW_CACHE_##x
 518
 519 extern u64 __read_mostly hw_cache_event_ids
 520                                 [PERF_COUNT_HW_CACHE_MAX]
 521                                 [PERF_COUNT_HW_CACHE_OP_MAX]
 522                                 [PERF_COUNT_HW_CACHE_RESULT_MAX];
 523 extern u64 __read_mostly hw_cache_extra_regs
 524                                 [PERF_COUNT_HW_CACHE_MAX]
 525                                 [PERF_COUNT_HW_CACHE_OP_MAX]
 526                                 [PERF_COUNT_HW_CACHE_RESULT_MAX];
 527
 528 u64 x86_perf_event_update(struct perf_event *event);
 529
 530 static inline unsigned int x86_pmu_config_addr(int index)
 531 {
 532         return x86_pmu.eventsel + (x86_pmu.addr_offset ?
 533                                    x86_pmu.addr_offset(index, true) : index);
 534 }
 535
 536 static inline unsigned int x86_pmu_event_addr(int index)
 537 {
 538         return x86_pmu.perfctr + (x86_pmu.addr_offset ?
 539                                   x86_pmu.addr_offset(index, false) : index);
 540 }
 541
 542 static inline int x86_pmu_rdpmc_index(int index)
 543 {
 544         return x86_pmu.rdpmc_index ? x86_pmu.rdpmc_index(index) : index;
 545 }
 546
 547 int x86_setup_perfctr(struct perf_event *event);
 548
 549 int x86_pmu_hw_config(struct perf_event *event);
 550
 551 void x86_pmu_disable_all(void);
 552
 553 static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc,
 554                                           u64 enable_mask)
 555 {
 556         u64 disable_mask = __this_cpu_read(cpu_hw_events.perf_ctr_virt_mask);
 557
 558         if (hwc->extra_reg.reg)
 559                 wrmsrl(hwc->extra_reg.reg, hwc->extra_reg.config);
 560         wrmsrl(hwc->config_base, (hwc->config | enable_mask) & ~disable_mask);
 561 }
 562
 563 void x86_pmu_enable_all(int added);
 564
 565 int perf_assign_events(struct perf_event **events, int n,
 566                         int wmin, int wmax, int *assign);
 567 int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign);
 568
 569 void x86_pmu_stop(struct perf_event *event, int flags);
 570
 571 static inline void x86_pmu_disable_event(struct perf_event *event)
 572 {
 573         struct hw_perf_event *hwc = &event->hw;
 574
 575         wrmsrl(hwc->config_base, hwc->config);
 576 }
 577
 578 void x86_pmu_enable_event(struct perf_event *event);
 579
 580 int x86_pmu_handle_irq(struct pt_regs *regs);
 581
 582 extern struct event_constraint emptyconstraint;
 583
 584 extern struct event_constraint unconstrained;
 585
 586 static inline bool kernel_ip(unsigned long ip)
 587 {
 588 #ifdef CONFIG_X86_32
 589         return ip > PAGE_OFFSET;
 590 #else
 591         return (long)ip < 0;
 592 #endif
 593 }
 594
 595 /*
 596  * Not all PMUs provide the right context information to place the reported IP
 597  * into full context. Specifically segment registers are typically not
 598  * supplied.
 599  *
 600  * Assuming the address is a linear address (it is for IBS), we fake the CS and
 601  * vm86 mode using the known zero-based code segment and 'fix up' the registers
 602  * to reflect this.
 603  *
 604  * Intel PEBS/LBR appear to typically provide the effective address, nothing
 605  * much we can do about that but pray and treat it like a linear address.
 606  */
 607 static inline void set_linear_ip(struct pt_regs *regs, unsigned long ip)
 608 {
 609         regs->cs = kernel_ip(ip) ? __KERNEL_CS : __USER_CS;
 610         if (regs->flags & X86_VM_MASK)
 611                 regs->flags ^= (PERF_EFLAGS_VM | X86_VM_MASK);
 612         regs->ip = ip;
 613 }
 614
 615 ssize_t x86_event_sysfs_show(char *page, u64 config, u64 event);
 616 ssize_t intel_event_sysfs_show(char *page, u64 config);
 617
 618 #ifdef CONFIG_CPU_SUP_AMD
 619
 620 int amd_pmu_init(void);
 621
 622 #else /* CONFIG_CPU_SUP_AMD */
 623
 624 static inline int amd_pmu_init(void)
 625 {
 626         return 0;
 627 }
 628
 629 #endif /* CONFIG_CPU_SUP_AMD */
 630
 631 #ifdef CONFIG_CPU_SUP_INTEL
 632
 633 int intel_pmu_save_and_restart(struct perf_event *event);
 634
 635 struct event_constraint *
 636 x86_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event);
 637
 638 struct intel_shared_regs *allocate_shared_regs(int cpu);
 639
 640 int intel_pmu_init(void);
 641
 642 void init_debug_store_on_cpu(int cpu);
 643
 644 void fini_debug_store_on_cpu(int cpu);
 645
 646 void release_ds_buffers(void);
 647
 648 void reserve_ds_buffers(void);
 649
 650 extern struct event_constraint bts_constraint;
 651
 652 void intel_pmu_enable_bts(u64 config);
 653
 654 void intel_pmu_disable_bts(void);
 655
 656 int intel_pmu_drain_bts_buffer(void);
 657
 658 extern struct event_constraint intel_core2_pebs_event_constraints[];
 659
 660 extern struct event_constraint intel_atom_pebs_event_constraints[];
 661
 662 extern struct event_constraint intel_slm_pebs_event_constraints[];
 663
 664 extern struct event_constraint intel_nehalem_pebs_event_constraints[];
 665
 666 extern struct event_constraint intel_westmere_pebs_event_constraints[];
 667
 668 extern struct event_constraint intel_snb_pebs_event_constraints[];
 669
 670 extern struct event_constraint intel_ivb_pebs_event_constraints[];
 671
 672 extern struct event_constraint intel_hsw_pebs_event_constraints[];
 673
 674 struct event_constraint *intel_pebs_constraints(struct perf_event *event);
 675
 676 void intel_pmu_pebs_enable(struct perf_event *event);
 677
 678 void intel_pmu_pebs_disable(struct perf_event *event);
 679
 680 void intel_pmu_pebs_enable_all(void);
 681
 682 void intel_pmu_pebs_disable_all(void);
 683
 684 void intel_ds_init(void);
 685
 686 void intel_pmu_lbr_reset(void);
 687
 688 void intel_pmu_lbr_enable(struct perf_event *event);
 689
 690 void intel_pmu_lbr_disable(struct perf_event *event);
 691
 692 void intel_pmu_lbr_enable_all(void);
 693
 694 void intel_pmu_lbr_disable_all(void);
 695
 696 void intel_pmu_lbr_read(void);
 697
 698 void intel_pmu_lbr_init_core(void);
 699
 700 void intel_pmu_lbr_init_nhm(void);
 701
 702 void intel_pmu_lbr_init_atom(void);
 703
 704 void intel_pmu_lbr_init_snb(void);
 705
 706 int intel_pmu_setup_lbr_filter(struct perf_event *event);
 707
 708 int p4_pmu_init(void);
 709
 710 int p6_pmu_init(void);
 711
 712 int knc_pmu_init(void);
 713
 714 ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr,
 715                           char *page);
 716
 717 #else /* CONFIG_CPU_SUP_INTEL */
 718
 719 static inline void reserve_ds_buffers(void)
 720 {
 721 }
 722
 723 static inline void release_ds_buffers(void)
 724 {
 725 }
 726
 727 static inline int intel_pmu_init(void)
 728 {
 729         return 0;
 730 }
 731
 732 static inline struct intel_shared_regs *allocate_shared_regs(int cpu)
 733 {
 734         return NULL;
 735 }
 736
 737 #endif /* CONFIG_CPU_SUP_INTEL */