arch/x86/kernel/cpu/perf_event_amd.c

   1 #include <linux/perf_event.h>
   2 #include <linux/export.h>
   3 #include <linux/types.h>
   4 #include <linux/init.h>
   5 #include <linux/slab.h>
   6 #include <asm/apicdef.h>
   7
   8 #include "perf_event.h"
   9
  10 static __initconst const u64 amd_hw_cache_event_ids
  11                                 [PERF_COUNT_HW_CACHE_MAX]
  12                                 [PERF_COUNT_HW_CACHE_OP_MAX]
  13                                 [PERF_COUNT_HW_CACHE_RESULT_MAX] =
  14 {
  15  [ C(L1D) ] = {
  16         [ C(OP_READ) ] = {
  17                 [ C(RESULT_ACCESS) ] = 0x0040, /* Data Cache Accesses        */
  18                 [ C(RESULT_MISS)   ] = 0x0141, /* Data Cache Misses          */
  19         },
  20         [ C(OP_WRITE) ] = {
  21                 [ C(RESULT_ACCESS) ] = 0x0142, /* Data Cache Refills :system */
  22                 [ C(RESULT_MISS)   ] = 0,
  23         },
  24         [ C(OP_PREFETCH) ] = {
  25                 [ C(RESULT_ACCESS) ] = 0x0267, /* Data Prefetcher :attempts  */
  26                 [ C(RESULT_MISS)   ] = 0x0167, /* Data Prefetcher :cancelled */
  27         },
  28  },
  29  [ C(L1I ) ] = {
  30         [ C(OP_READ) ] = {
  31                 [ C(RESULT_ACCESS) ] = 0x0080, /* Instruction cache fetches  */
  32                 [ C(RESULT_MISS)   ] = 0x0081, /* Instruction cache misses   */
  33         },
  34         [ C(OP_WRITE) ] = {
  35                 [ C(RESULT_ACCESS) ] = -1,
  36                 [ C(RESULT_MISS)   ] = -1,
  37         },
  38         [ C(OP_PREFETCH) ] = {
  39                 [ C(RESULT_ACCESS) ] = 0x014B, /* Prefetch Instructions :Load */
  40                 [ C(RESULT_MISS)   ] = 0,
  41         },
  42  },
  43  [ C(LL  ) ] = {
  44         [ C(OP_READ) ] = {
  45                 [ C(RESULT_ACCESS) ] = 0x037D, /* Requests to L2 Cache :IC+DC */
  46                 [ C(RESULT_MISS)   ] = 0x037E, /* L2 Cache Misses : IC+DC     */
  47         },
  48         [ C(OP_WRITE) ] = {
  49                 [ C(RESULT_ACCESS) ] = 0x017F, /* L2 Fill/Writeback           */
  50                 [ C(RESULT_MISS)   ] = 0,
  51         },
  52         [ C(OP_PREFETCH) ] = {
  53                 [ C(RESULT_ACCESS) ] = 0,
  54                 [ C(RESULT_MISS)   ] = 0,
  55         },
  56  },
  57  [ C(DTLB) ] = {
  58         [ C(OP_READ) ] = {
  59                 [ C(RESULT_ACCESS) ] = 0x0040, /* Data Cache Accesses        */
  60                 [ C(RESULT_MISS)   ] = 0x0746, /* L1_DTLB_AND_L2_DLTB_MISS.ALL */
  61         },
  62         [ C(OP_WRITE) ] = {
  63                 [ C(RESULT_ACCESS) ] = 0,
  64                 [ C(RESULT_MISS)   ] = 0,
  65         },
  66         [ C(OP_PREFETCH) ] = {
  67                 [ C(RESULT_ACCESS) ] = 0,
  68                 [ C(RESULT_MISS)   ] = 0,
  69         },
  70  },
  71  [ C(ITLB) ] = {
  72         [ C(OP_READ) ] = {
  73                 [ C(RESULT_ACCESS) ] = 0x0080, /* Instruction fecthes        */
  74                 [ C(RESULT_MISS)   ] = 0x0385, /* L1_ITLB_AND_L2_ITLB_MISS.ALL */
  75         },
  76         [ C(OP_WRITE) ] = {
  77                 [ C(RESULT_ACCESS) ] = -1,
  78                 [ C(RESULT_MISS)   ] = -1,
  79         },
  80         [ C(OP_PREFETCH) ] = {
  81                 [ C(RESULT_ACCESS) ] = -1,
  82                 [ C(RESULT_MISS)   ] = -1,
  83         },
  84  },
  85  [ C(BPU ) ] = {
  86         [ C(OP_READ) ] = {
  87                 [ C(RESULT_ACCESS) ] = 0x00c2, /* Retired Branch Instr.      */
  88                 [ C(RESULT_MISS)   ] = 0x00c3, /* Retired Mispredicted BI    */
  89         },
  90         [ C(OP_WRITE) ] = {
  91                 [ C(RESULT_ACCESS) ] = -1,
  92                 [ C(RESULT_MISS)   ] = -1,
  93         },
  94         [ C(OP_PREFETCH) ] = {
  95                 [ C(RESULT_ACCESS) ] = -1,
  96                 [ C(RESULT_MISS)   ] = -1,
  97         },
  98  },
  99  [ C(NODE) ] = {
 100         [ C(OP_READ) ] = {
 101                 [ C(RESULT_ACCESS) ] = 0xb8e9, /* CPU Request to Memory, l+r */
 102                 [ C(RESULT_MISS)   ] = 0x98e9, /* CPU Request to Memory, r   */
 103         },
 104         [ C(OP_WRITE) ] = {
 105                 [ C(RESULT_ACCESS) ] = -1,
 106                 [ C(RESULT_MISS)   ] = -1,
 107         },
 108         [ C(OP_PREFETCH) ] = {
 109                 [ C(RESULT_ACCESS) ] = -1,
 110                 [ C(RESULT_MISS)   ] = -1,
 111         },
 112  },
 113 };
 114
 115 /*
 116  * AMD Performance Monitor K7 and later.
 117  */
 118 static const u64 amd_perfmon_event_map[] =
 119 {
 120   [PERF_COUNT_HW_CPU_CYCLES]                    = 0x0076,
 121   [PERF_COUNT_HW_INSTRUCTIONS]                  = 0x00c0,
 122   [PERF_COUNT_HW_CACHE_REFERENCES]              = 0x0080,
 123   [PERF_COUNT_HW_CACHE_MISSES]                  = 0x0081,
 124   [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]           = 0x00c2,
 125   [PERF_COUNT_HW_BRANCH_MISSES]                 = 0x00c3,
 126   [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND]       = 0x00d0, /* "Decoder empty" event */
 127   [PERF_COUNT_HW_STALLED_CYCLES_BACKEND]        = 0x00d1, /* "Dispatch stalls" event */
 128 };
 129
 130 static u64 amd_pmu_event_map(int hw_event)
 131 {
 132         return amd_perfmon_event_map[hw_event];
 133 }
 134
 135 static int amd_pmu_hw_config(struct perf_event *event)
 136 {
 137         int ret = x86_pmu_hw_config(event);
 138
 139         if (ret)
 140                 return ret;
 141
 142         if (has_branch_stack(event))
 143                 return -EOPNOTSUPP;
 144
 145         if (event->attr.exclude_host && event->attr.exclude_guest)
 146                 /*
 147                  * When HO == GO == 1 the hardware treats that as GO == HO == 0
 148                  * and will count in both modes. We don't want to count in that
 149                  * case so we emulate no-counting by setting US = OS = 0.
 150                  */
 151                 event->hw.config &= ~(ARCH_PERFMON_EVENTSEL_USR |
 152                                       ARCH_PERFMON_EVENTSEL_OS);
 153         else if (event->attr.exclude_host)
 154                 event->hw.config |= AMD_PERFMON_EVENTSEL_GUESTONLY;
 155         else if (event->attr.exclude_guest)
 156                 event->hw.config |= AMD_PERFMON_EVENTSEL_HOSTONLY;
 157
 158         if (event->attr.type != PERF_TYPE_RAW)
 159                 return 0;
 160
 161         event->hw.config |= event->attr.config & AMD64_RAW_EVENT_MASK;
 162
 163         return 0;
 164 }
 165
 166 /*
 167  * AMD64 events are detected based on their event codes.
 168  */
 169 static inline unsigned int amd_get_event_code(struct hw_perf_event *hwc)
 170 {
 171         return ((hwc->config >> 24) & 0x0f00) | (hwc->config & 0x00ff);
 172 }
 173
 174 static inline int amd_is_nb_event(struct hw_perf_event *hwc)
 175 {
 176         return (hwc->config & 0xe0) == 0xe0;
 177 }
 178
 179 static inline int amd_has_nb(struct cpu_hw_events *cpuc)
 180 {
 181         struct amd_nb *nb = cpuc->amd_nb;
 182
 183         return nb && nb->nb_id != -1;
 184 }
 185
 186 static void amd_put_event_constraints(struct cpu_hw_events *cpuc,
 187                                       struct perf_event *event)
 188 {
 189         struct hw_perf_event *hwc = &event->hw;
 190         struct amd_nb *nb = cpuc->amd_nb;
 191         int i;
 192
 193         /*
 194          * only care about NB events
 195          */
 196         if (!(amd_has_nb(cpuc) && amd_is_nb_event(hwc)))
 197                 return;
 198
 199         /*
 200          * need to scan whole list because event may not have
 201          * been assigned during scheduling
 202          *
 203          * no race condition possible because event can only
 204          * be removed on one CPU at a time AND PMU is disabled
 205          * when we come here
 206          */
 207         for (i = 0; i < x86_pmu.num_counters; i++) {
 208                 if (nb->owners[i] == event) {
 209                         cmpxchg(nb->owners+i, event, NULL);
 210                         break;
 211                 }
 212         }
 213 }
 214
 215  /*
 216   * AMD64 NorthBridge events need special treatment because
 217   * counter access needs to be synchronized across all cores
 218   * of a package. Refer to BKDG section 3.12
 219   *
 220   * NB events are events measuring L3 cache, Hypertransport
 221   * traffic. They are identified by an event code >= 0xe00.
 222   * They measure events on the NorthBride which is shared
 223   * by all cores on a package. NB events are counted on a
 224   * shared set of counters. When a NB event is programmed
 225   * in a counter, the data actually comes from a shared
 226   * counter. Thus, access to those counters needs to be
 227   * synchronized.
 228   *
 229   * We implement the synchronization such that no two cores
 230   * can be measuring NB events using the same counters. Thus,
 231   * we maintain a per-NB allocation table. The available slot
 232   * is propagated using the event_constraint structure.
 233   *
 234   * We provide only one choice for each NB event based on
 235   * the fact that only NB events have restrictions. Consequently,
 236   * if a counter is available, there is a guarantee the NB event
 237   * will be assigned to it. If no slot is available, an empty
 238   * constraint is returned and scheduling will eventually fail
 239   * for this event.
 240   *
 241   * Note that all cores attached the same NB compete for the same
 242   * counters to host NB events, this is why we use atomic ops. Some
 243   * multi-chip CPUs may have more than one NB.
 244   *
 245   * Given that resources are allocated (cmpxchg), they must be
 246   * eventually freed for others to use. This is accomplished by
 247   * calling amd_put_event_constraints().
 248   *
 249   * Non NB events are not impacted by this restriction.
 250   */
 251 static struct event_constraint *
 252 amd_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
 253 {
 254         struct hw_perf_event *hwc = &event->hw;
 255         struct amd_nb *nb = cpuc->amd_nb;
 256         struct perf_event *old = NULL;
 257         int max = x86_pmu.num_counters;
 258         int i, j, k = -1;
 259
 260         /*
 261          * if not NB event or no NB, then no constraints
 262          */
 263         if (!(amd_has_nb(cpuc) && amd_is_nb_event(hwc)))
 264                 return &unconstrained;
 265
 266         /*
 267          * detect if already present, if so reuse
 268          *
 269          * cannot merge with actual allocation
 270          * because of possible holes
 271          *
 272          * event can already be present yet not assigned (in hwc->idx)
 273          * because of successive calls to x86_schedule_events() from
 274          * hw_perf_group_sched_in() without hw_perf_enable()
 275          */
 276         for (i = 0; i < max; i++) {
 277                 /*
 278                  * keep track of first free slot
 279                  */
 280                 if (k == -1 && !nb->owners[i])
 281                         k = i;
 282
 283                 /* already present, reuse */
 284                 if (nb->owners[i] == event)
 285                         goto done;
 286         }
 287         /*
 288          * not present, so grab a new slot
 289          * starting either at:
 290          */
 291         if (hwc->idx != -1) {
 292                 /* previous assignment */
 293                 i = hwc->idx;
 294         } else if (k != -1) {
 295                 /* start from free slot found */
 296                 i = k;
 297         } else {
 298                 /*
 299                  * event not found, no slot found in
 300                  * first pass, try again from the
 301                  * beginning
 302                  */
 303                 i = 0;
 304         }
 305         j = i;
 306         do {
 307                 old = cmpxchg(nb->owners+i, NULL, event);
 308                 if (!old)
 309                         break;
 310                 if (++i == max)
 311                         i = 0;
 312         } while (i != j);
 313 done:
 314         if (!old)
 315                 return &nb->event_constraints[i];
 316
 317         return &emptyconstraint;
 318 }
 319
 320 static struct amd_nb *amd_alloc_nb(int cpu)
 321 {
 322         struct amd_nb *nb;
 323         int i;
 324
 325         nb = kmalloc_node(sizeof(struct amd_nb), GFP_KERNEL | __GFP_ZERO,
 326                           cpu_to_node(cpu));
 327         if (!nb)
 328                 return NULL;
 329
 330         nb->nb_id = -1;
 331
 332         /*
 333          * initialize all possible NB constraints
 334          */
 335         for (i = 0; i < x86_pmu.num_counters; i++) {
 336                 __set_bit(i, nb->event_constraints[i].idxmsk);
 337                 nb->event_constraints[i].weight = 1;
 338         }
 339         return nb;
 340 }
 341
 342 static int amd_pmu_cpu_prepare(int cpu)
 343 {
 344         struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
 345
 346         WARN_ON_ONCE(cpuc->amd_nb);
 347
 348         if (boot_cpu_data.x86_max_cores < 2)
 349                 return NOTIFY_OK;
 350
 351         cpuc->amd_nb = amd_alloc_nb(cpu);
 352         if (!cpuc->amd_nb)
 353                 return NOTIFY_BAD;
 354
 355         return NOTIFY_OK;
 356 }
 357
 358 static void amd_pmu_cpu_starting(int cpu)
 359 {
 360         struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
 361         struct amd_nb *nb;
 362         int i, nb_id;
 363
 364         cpuc->perf_ctr_virt_mask = AMD_PERFMON_EVENTSEL_HOSTONLY;
 365
 366         if (boot_cpu_data.x86_max_cores < 2 || boot_cpu_data.x86 == 0x15)
 367                 return;
 368
 369         nb_id = amd_get_nb_id(cpu);
 370         WARN_ON_ONCE(nb_id == BAD_APICID);
 371
 372         for_each_online_cpu(i) {
 373                 nb = per_cpu(cpu_hw_events, i).amd_nb;
 374                 if (WARN_ON_ONCE(!nb))
 375                         continue;
 376
 377                 if (nb->nb_id == nb_id) {
 378                         cpuc->kfree_on_online = cpuc->amd_nb;
 379                         cpuc->amd_nb = nb;
 380                         break;
 381                 }
 382         }
 383
 384         cpuc->amd_nb->nb_id = nb_id;
 385         cpuc->amd_nb->refcnt++;
 386 }
 387
 388 static void amd_pmu_cpu_dead(int cpu)
 389 {
 390         struct cpu_hw_events *cpuhw;
 391
 392         if (boot_cpu_data.x86_max_cores < 2)
 393                 return;
 394
 395         cpuhw = &per_cpu(cpu_hw_events, cpu);
 396
 397         if (cpuhw->amd_nb) {
 398                 struct amd_nb *nb = cpuhw->amd_nb;
 399
 400                 if (nb->nb_id == -1 || --nb->refcnt == 0)
 401                         kfree(nb);
 402
 403                 cpuhw->amd_nb = NULL;
 404         }
 405 }
 406
 407 static __initconst const struct x86_pmu amd_pmu = {
 408         .name                   = "AMD",
 409         .handle_irq             = x86_pmu_handle_irq,
 410         .disable_all            = x86_pmu_disable_all,
 411         .enable_all             = x86_pmu_enable_all,
 412         .enable                 = x86_pmu_enable_event,
 413         .disable                = x86_pmu_disable_event,
 414         .hw_config              = amd_pmu_hw_config,
 415         .schedule_events        = x86_schedule_events,
 416         .eventsel               = MSR_K7_EVNTSEL0,
 417         .perfctr                = MSR_K7_PERFCTR0,
 418         .event_map              = amd_pmu_event_map,
 419         .max_events             = ARRAY_SIZE(amd_perfmon_event_map),
 420         .num_counters           = AMD64_NUM_COUNTERS,
 421         .cntval_bits            = 48,
 422         .cntval_mask            = (1ULL << 48) - 1,
 423         .apic                   = 1,
 424         /* use highest bit to detect overflow */
 425         .max_period             = (1ULL << 47) - 1,
 426         .get_event_constraints  = amd_get_event_constraints,
 427         .put_event_constraints  = amd_put_event_constraints,
 428
 429         .cpu_prepare            = amd_pmu_cpu_prepare,
 430         .cpu_starting           = amd_pmu_cpu_starting,
 431         .cpu_dead               = amd_pmu_cpu_dead,
 432 };
 433
 434 /* AMD Family 15h */
 435
 436 #define AMD_EVENT_TYPE_MASK     0x000000F0ULL
 437
 438 #define AMD_EVENT_FP            0x00000000ULL ... 0x00000010ULL
 439 #define AMD_EVENT_LS            0x00000020ULL ... 0x00000030ULL
 440 #define AMD_EVENT_DC            0x00000040ULL ... 0x00000050ULL
 441 #define AMD_EVENT_CU            0x00000060ULL ... 0x00000070ULL
 442 #define AMD_EVENT_IC_DE         0x00000080ULL ... 0x00000090ULL
 443 #define AMD_EVENT_EX_LS         0x000000C0ULL
 444 #define AMD_EVENT_DE            0x000000D0ULL
 445 #define AMD_EVENT_NB            0x000000E0ULL ... 0x000000F0ULL
 446
 447 /*
 448  * AMD family 15h event code/PMC mappings:
 449  *
 450  * type = event_code & 0x0F0:
 451  *
 452  * 0x000        FP      PERF_CTL[5:3]
 453  * 0x010        FP      PERF_CTL[5:3]
 454  * 0x020        LS      PERF_CTL[5:0]
 455  * 0x030        LS      PERF_CTL[5:0]
 456  * 0x040        DC      PERF_CTL[5:0]
 457  * 0x050        DC      PERF_CTL[5:0]
 458  * 0x060        CU      PERF_CTL[2:0]
 459  * 0x070        CU      PERF_CTL[2:0]
 460  * 0x080        IC/DE   PERF_CTL[2:0]
 461  * 0x090        IC/DE   PERF_CTL[2:0]
 462  * 0x0A0        ---
 463  * 0x0B0        ---
 464  * 0x0C0        EX/LS   PERF_CTL[5:0]
 465  * 0x0D0        DE      PERF_CTL[2:0]
 466  * 0x0E0        NB      NB_PERF_CTL[3:0]
 467  * 0x0F0        NB      NB_PERF_CTL[3:0]
 468  *
 469  * Exceptions:
 470  *
 471  * 0x000        FP      PERF_CTL[3], PERF_CTL[5:3] (*)
 472  * 0x003        FP      PERF_CTL[3]
 473  * 0x004        FP      PERF_CTL[3], PERF_CTL[5:3] (*)
 474  * 0x00B        FP      PERF_CTL[3]
 475  * 0x00D        FP      PERF_CTL[3]
 476  * 0x023        DE      PERF_CTL[2:0]
 477  * 0x02D        LS      PERF_CTL[3]
 478  * 0x02E        LS      PERF_CTL[3,0]
 479  * 0x043        CU      PERF_CTL[2:0]
 480  * 0x045        CU      PERF_CTL[2:0]
 481  * 0x046        CU      PERF_CTL[2:0]
 482  * 0x054        CU      PERF_CTL[2:0]
 483  * 0x055        CU      PERF_CTL[2:0]
 484  * 0x08F        IC      PERF_CTL[0]
 485  * 0x187        DE      PERF_CTL[0]
 486  * 0x188        DE      PERF_CTL[0]
 487  * 0x0DB        EX      PERF_CTL[5:0]
 488  * 0x0DC        LS      PERF_CTL[5:0]
 489  * 0x0DD        LS      PERF_CTL[5:0]
 490  * 0x0DE        LS      PERF_CTL[5:0]
 491  * 0x0DF        LS      PERF_CTL[5:0]
 492  * 0x1D6        EX      PERF_CTL[5:0]
 493  * 0x1D8        EX      PERF_CTL[5:0]
 494  *
 495  * (*) depending on the umask all FPU counters may be used
 496  */
 497
 498 static struct event_constraint amd_f15_PMC0  = EVENT_CONSTRAINT(0, 0x01, 0);
 499 static struct event_constraint amd_f15_PMC20 = EVENT_CONSTRAINT(0, 0x07, 0);
 500 static struct event_constraint amd_f15_PMC3  = EVENT_CONSTRAINT(0, 0x08, 0);
 501 static struct event_constraint amd_f15_PMC30 = EVENT_CONSTRAINT_OVERLAP(0, 0x09, 0);
 502 static struct event_constraint amd_f15_PMC50 = EVENT_CONSTRAINT(0, 0x3F, 0);
 503 static struct event_constraint amd_f15_PMC53 = EVENT_CONSTRAINT(0, 0x38, 0);
 504
 505 static struct event_constraint *
 506 amd_get_event_constraints_f15h(struct cpu_hw_events *cpuc, struct perf_event *event)
 507 {
 508         struct hw_perf_event *hwc = &event->hw;
 509         unsigned int event_code = amd_get_event_code(hwc);
 510
 511         switch (event_code & AMD_EVENT_TYPE_MASK) {
 512         case AMD_EVENT_FP:
 513                 switch (event_code) {
 514                 case 0x000:
 515                         if (!(hwc->config & 0x0000F000ULL))
 516                                 break;
 517                         if (!(hwc->config & 0x00000F00ULL))
 518                                 break;
 519                         return &amd_f15_PMC3;
 520                 case 0x004:
 521                         if (hweight_long(hwc->config & ARCH_PERFMON_EVENTSEL_UMASK) <= 1)
 522                                 break;
 523                         return &amd_f15_PMC3;
 524                 case 0x003:
 525                 case 0x00B:
 526                 case 0x00D:
 527                         return &amd_f15_PMC3;
 528                 }
 529                 return &amd_f15_PMC53;
 530         case AMD_EVENT_LS:
 531         case AMD_EVENT_DC:
 532         case AMD_EVENT_EX_LS:
 533                 switch (event_code) {
 534                 case 0x023:
 535                 case 0x043:
 536                 case 0x045:
 537                 case 0x046:
 538                 case 0x054:
 539                 case 0x055:
 540                         return &amd_f15_PMC20;
 541                 case 0x02D:
 542                         return &amd_f15_PMC3;
 543                 case 0x02E:
 544                         return &amd_f15_PMC30;
 545                 default:
 546                         return &amd_f15_PMC50;
 547                 }
 548         case AMD_EVENT_CU:
 549         case AMD_EVENT_IC_DE:
 550         case AMD_EVENT_DE:
 551                 switch (event_code) {
 552                 case 0x08F:
 553                 case 0x187:
 554                 case 0x188:
 555                         return &amd_f15_PMC0;
 556                 case 0x0DB ... 0x0DF:
 557                 case 0x1D6:
 558                 case 0x1D8:
 559                         return &amd_f15_PMC50;
 560                 default:
 561                         return &amd_f15_PMC20;
 562                 }
 563         case AMD_EVENT_NB:
 564                 /* not yet implemented */
 565                 return &emptyconstraint;
 566         default:
 567                 return &emptyconstraint;
 568         }
 569 }
 570
 571 static __initconst const struct x86_pmu amd_pmu_f15h = {
 572         .name                   = "AMD Family 15h",
 573         .handle_irq             = x86_pmu_handle_irq,
 574         .disable_all            = x86_pmu_disable_all,
 575         .enable_all             = x86_pmu_enable_all,
 576         .enable                 = x86_pmu_enable_event,
 577         .disable                = x86_pmu_disable_event,
 578         .hw_config              = amd_pmu_hw_config,
 579         .schedule_events        = x86_schedule_events,
 580         .eventsel               = MSR_F15H_PERF_CTL,
 581         .perfctr                = MSR_F15H_PERF_CTR,
 582         .event_map              = amd_pmu_event_map,
 583         .max_events             = ARRAY_SIZE(amd_perfmon_event_map),
 584         .num_counters           = AMD64_NUM_COUNTERS_F15H,
 585         .cntval_bits            = 48,
 586         .cntval_mask            = (1ULL << 48) - 1,
 587         .apic                   = 1,
 588         /* use highest bit to detect overflow */
 589         .max_period             = (1ULL << 47) - 1,
 590         .get_event_constraints  = amd_get_event_constraints_f15h,
 591         /* nortbridge counters not yet implemented: */
 592 #if 0
 593         .put_event_constraints  = amd_put_event_constraints,
 594
 595         .cpu_prepare            = amd_pmu_cpu_prepare,
 596         .cpu_dead               = amd_pmu_cpu_dead,
 597 #endif
 598         .cpu_starting           = amd_pmu_cpu_starting,
 599 };
 600
 601 __init int amd_pmu_init(void)
 602 {
 603         /* Performance-monitoring supported from K7 and later: */
 604         if (boot_cpu_data.x86 < 6)
 605                 return -ENODEV;
 606
 607         /*
 608          * If core performance counter extensions exists, it must be
 609          * family 15h, otherwise fail. See x86_pmu_addr_offset().
 610          */
 611         switch (boot_cpu_data.x86) {
 612         case 0x15:
 613                 if (!cpu_has_perfctr_core)
 614                         return -ENODEV;
 615                 x86_pmu = amd_pmu_f15h;
 616                 break;
 617         default:
 618                 if (cpu_has_perfctr_core)
 619                         return -ENODEV;
 620                 x86_pmu = amd_pmu;
 621                 break;
 622         }
 623
 624         /* Events are common for all AMDs */
 625         memcpy(hw_cache_event_ids, amd_hw_cache_event_ids,
 626                sizeof(hw_cache_event_ids));
 627
 628         return 0;
 629 }
 630
 631 void amd_pmu_enable_virt(void)
 632 {
 633         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 634
 635         cpuc->perf_ctr_virt_mask = 0;
 636
 637         /* Reload all events */
 638         x86_pmu_disable_all();
 639         x86_pmu_enable_all(0);
 640 }
 641 EXPORT_SYMBOL_GPL(amd_pmu_enable_virt);
 642
 643 void amd_pmu_disable_virt(void)
 644 {
 645         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 646
 647         /*
 648          * We only mask out the Host-only bit so that host-only counting works
 649          * when SVM is disabled. If someone sets up a guest-only counter when
 650          * SVM is disabled the Guest-only bits still gets set and the counter
 651          * will not count anything.
 652          */
 653         cpuc->perf_ctr_virt_mask = AMD_PERFMON_EVENTSEL_HOSTONLY;
 654
 655         /* Reload all events */
 656         x86_pmu_disable_all();
 657         x86_pmu_enable_all(0);
 658 }
 659 EXPORT_SYMBOL_GPL(amd_pmu_disable_virt);