arch/x86/events/intel/uncore.c

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This source file includes following definitions.
uncore_pcibus_to_physid
uncore_free_pcibus_map
__find_pci2phy_map
uncore_event_show
uncore_pmu_to_box
uncore_msr_read_counter
uncore_mmio_exit_box
uncore_mmio_read_counter
uncore_get_constraint
uncore_put_constraint
uncore_shared_reg_config
uncore_assign_hw_event
uncore_perf_event_update
uncore_pmu_hrtimer
uncore_pmu_start_hrtimer
uncore_pmu_cancel_hrtimer
uncore_pmu_init_hrtimer
uncore_alloc_box
is_box_event
uncore_collect_events
uncore_get_event_constraint
uncore_put_event_constraint
uncore_assign_events
uncore_pmu_event_start
uncore_pmu_event_stop
uncore_pmu_event_add
uncore_pmu_event_del
uncore_pmu_event_read
uncore_validate_group
uncore_pmu_event_init
uncore_pmu_enable
uncore_pmu_disable
uncore_get_attr_cpumask
uncore_pmu_register
uncore_pmu_unregister
uncore_free_boxes
uncore_type_exit
uncore_types_exit
uncore_type_init
uncore_types_init
uncore_pci_probe
uncore_pci_remove
uncore_pci_init
uncore_pci_exit
uncore_change_type_ctx
uncore_change_context
uncore_box_unref
uncore_event_cpu_offline
allocate_boxes
uncore_box_ref
uncore_event_cpu_online
type_pmu_register
uncore_msr_pmus_register
uncore_cpu_init
uncore_mmio_init
intel_uncore_init
intel_uncore_exit
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 #include <linux/module.h>
   3 
   4 #include <asm/cpu_device_id.h>
   5 #include <asm/intel-family.h>
   6 #include "uncore.h"
   7 
   8 static struct intel_uncore_type *empty_uncore[] = { NULL, };
   9 struct intel_uncore_type **uncore_msr_uncores = empty_uncore;
  10 struct intel_uncore_type **uncore_pci_uncores = empty_uncore;
  11 struct intel_uncore_type **uncore_mmio_uncores = empty_uncore;
  12 
  13 static bool pcidrv_registered;
  14 struct pci_driver *uncore_pci_driver;
  15 /* pci bus to socket mapping */
  16 DEFINE_RAW_SPINLOCK(pci2phy_map_lock);
  17 struct list_head pci2phy_map_head = LIST_HEAD_INIT(pci2phy_map_head);
  18 struct pci_extra_dev *uncore_extra_pci_dev;
  19 static int max_dies;
  20 
  21 /* mask of cpus that collect uncore events */
  22 static cpumask_t uncore_cpu_mask;
  23 
  24 /* constraint for the fixed counter */
  25 static struct event_constraint uncore_constraint_fixed =
  26         EVENT_CONSTRAINT(~0ULL, 1 << UNCORE_PMC_IDX_FIXED, ~0ULL);
  27 struct event_constraint uncore_constraint_empty =
  28         EVENT_CONSTRAINT(0, 0, 0);
  29 
  30 MODULE_LICENSE("GPL");
  31 
  32 int uncore_pcibus_to_physid(struct pci_bus *bus)
  33 {
  34         struct pci2phy_map *map;
  35         int phys_id = -1;
  36 
  37         raw_spin_lock(&pci2phy_map_lock);
  38         list_for_each_entry(map, &pci2phy_map_head, list) {
  39                 if (map->segment == pci_domain_nr(bus)) {
  40                         phys_id = map->pbus_to_physid[bus->number];
  41                         break;
  42                 }
  43         }
  44         raw_spin_unlock(&pci2phy_map_lock);
  45 
  46         return phys_id;
  47 }
  48 
  49 static void uncore_free_pcibus_map(void)
  50 {
  51         struct pci2phy_map *map, *tmp;
  52 
  53         list_for_each_entry_safe(map, tmp, &pci2phy_map_head, list) {
  54                 list_del(&map->list);
  55                 kfree(map);
  56         }
  57 }
  58 
  59 struct pci2phy_map *__find_pci2phy_map(int segment)
  60 {
  61         struct pci2phy_map *map, *alloc = NULL;
  62         int i;
  63 
  64         lockdep_assert_held(&pci2phy_map_lock);
  65 
  66 lookup:
  67         list_for_each_entry(map, &pci2phy_map_head, list) {
  68                 if (map->segment == segment)
  69                         goto end;
  70         }
  71 
  72         if (!alloc) {
  73                 raw_spin_unlock(&pci2phy_map_lock);
  74                 alloc = kmalloc(sizeof(struct pci2phy_map), GFP_KERNEL);
  75                 raw_spin_lock(&pci2phy_map_lock);
  76 
  77                 if (!alloc)
  78                         return NULL;
  79 
  80                 goto lookup;
  81         }
  82 
  83         map = alloc;
  84         alloc = NULL;
  85         map->segment = segment;
  86         for (i = 0; i < 256; i++)
  87                 map->pbus_to_physid[i] = -1;
  88         list_add_tail(&map->list, &pci2phy_map_head);
  89 
  90 end:
  91         kfree(alloc);
  92         return map;
  93 }
  94 
  95 ssize_t uncore_event_show(struct kobject *kobj,
  96                           struct kobj_attribute *attr, char *buf)
  97 {
  98         struct uncore_event_desc *event =
  99                 container_of(attr, struct uncore_event_desc, attr);
 100         return sprintf(buf, "%s", event->config);
 101 }
 102 
 103 struct intel_uncore_box *uncore_pmu_to_box(struct intel_uncore_pmu *pmu, int cpu)
 104 {
 105         unsigned int dieid = topology_logical_die_id(cpu);
 106 
 107         /*
 108          * The unsigned check also catches the '-1' return value for non
 109          * existent mappings in the topology map.
 110          */
 111         return dieid < max_dies ? pmu->boxes[dieid] : NULL;
 112 }
 113 
 114 u64 uncore_msr_read_counter(struct intel_uncore_box *box, struct perf_event *event)
 115 {
 116         u64 count;
 117 
 118         rdmsrl(event->hw.event_base, count);
 119 
 120         return count;
 121 }
 122 
 123 void uncore_mmio_exit_box(struct intel_uncore_box *box)
 124 {
 125         if (box->io_addr)
 126                 iounmap(box->io_addr);
 127 }
 128 
 129 u64 uncore_mmio_read_counter(struct intel_uncore_box *box,
 130                              struct perf_event *event)
 131 {
 132         if (!box->io_addr)
 133                 return 0;
 134 
 135         return readq(box->io_addr + event->hw.event_base);
 136 }
 137 
 138 /*
 139  * generic get constraint function for shared match/mask registers.
 140  */
 141 struct event_constraint *
 142 uncore_get_constraint(struct intel_uncore_box *box, struct perf_event *event)
 143 {
 144         struct intel_uncore_extra_reg *er;
 145         struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
 146         struct hw_perf_event_extra *reg2 = &event->hw.branch_reg;
 147         unsigned long flags;
 148         bool ok = false;
 149 
 150         /*
 151          * reg->alloc can be set due to existing state, so for fake box we
 152          * need to ignore this, otherwise we might fail to allocate proper
 153          * fake state for this extra reg constraint.
 154          */
 155         if (reg1->idx == EXTRA_REG_NONE ||
 156             (!uncore_box_is_fake(box) && reg1->alloc))
 157                 return NULL;
 158 
 159         er = &box->shared_regs[reg1->idx];
 160         raw_spin_lock_irqsave(&er->lock, flags);
 161         if (!atomic_read(&er->ref) ||
 162             (er->config1 == reg1->config && er->config2 == reg2->config)) {
 163                 atomic_inc(&er->ref);
 164                 er->config1 = reg1->config;
 165                 er->config2 = reg2->config;
 166                 ok = true;
 167         }
 168         raw_spin_unlock_irqrestore(&er->lock, flags);
 169 
 170         if (ok) {
 171                 if (!uncore_box_is_fake(box))
 172                         reg1->alloc = 1;
 173                 return NULL;
 174         }
 175 
 176         return &uncore_constraint_empty;
 177 }
 178 
 179 void uncore_put_constraint(struct intel_uncore_box *box, struct perf_event *event)
 180 {
 181         struct intel_uncore_extra_reg *er;
 182         struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
 183 
 184         /*
 185          * Only put constraint if extra reg was actually allocated. Also
 186          * takes care of event which do not use an extra shared reg.
 187          *
 188          * Also, if this is a fake box we shouldn't touch any event state
 189          * (reg->alloc) and we don't care about leaving inconsistent box
 190          * state either since it will be thrown out.
 191          */
 192         if (uncore_box_is_fake(box) || !reg1->alloc)
 193                 return;
 194 
 195         er = &box->shared_regs[reg1->idx];
 196         atomic_dec(&er->ref);
 197         reg1->alloc = 0;
 198 }
 199 
 200 u64 uncore_shared_reg_config(struct intel_uncore_box *box, int idx)
 201 {
 202         struct intel_uncore_extra_reg *er;
 203         unsigned long flags;
 204         u64 config;
 205 
 206         er = &box->shared_regs[idx];
 207 
 208         raw_spin_lock_irqsave(&er->lock, flags);
 209         config = er->config;
 210         raw_spin_unlock_irqrestore(&er->lock, flags);
 211 
 212         return config;
 213 }
 214 
 215 static void uncore_assign_hw_event(struct intel_uncore_box *box,
 216                                    struct perf_event *event, int idx)
 217 {
 218         struct hw_perf_event *hwc = &event->hw;
 219 
 220         hwc->idx = idx;
 221         hwc->last_tag = ++box->tags[idx];
 222 
 223         if (uncore_pmc_fixed(hwc->idx)) {
 224                 hwc->event_base = uncore_fixed_ctr(box);
 225                 hwc->config_base = uncore_fixed_ctl(box);
 226                 return;
 227         }
 228 
 229         hwc->config_base = uncore_event_ctl(box, hwc->idx);
 230         hwc->event_base  = uncore_perf_ctr(box, hwc->idx);
 231 }
 232 
 233 void uncore_perf_event_update(struct intel_uncore_box *box, struct perf_event *event)
 234 {
 235         u64 prev_count, new_count, delta;
 236         int shift;
 237 
 238         if (uncore_pmc_freerunning(event->hw.idx))
 239                 shift = 64 - uncore_freerunning_bits(box, event);
 240         else if (uncore_pmc_fixed(event->hw.idx))
 241                 shift = 64 - uncore_fixed_ctr_bits(box);
 242         else
 243                 shift = 64 - uncore_perf_ctr_bits(box);
 244 
 245         /* the hrtimer might modify the previous event value */
 246 again:
 247         prev_count = local64_read(&event->hw.prev_count);
 248         new_count = uncore_read_counter(box, event);
 249         if (local64_xchg(&event->hw.prev_count, new_count) != prev_count)
 250                 goto again;
 251 
 252         delta = (new_count << shift) - (prev_count << shift);
 253         delta >>= shift;
 254 
 255         local64_add(delta, &event->count);
 256 }
 257 
 258 /*
 259  * The overflow interrupt is unavailable for SandyBridge-EP, is broken
 260  * for SandyBridge. So we use hrtimer to periodically poll the counter
 261  * to avoid overflow.
 262  */
 263 static enum hrtimer_restart uncore_pmu_hrtimer(struct hrtimer *hrtimer)
 264 {
 265         struct intel_uncore_box *box;
 266         struct perf_event *event;
 267         unsigned long flags;
 268         int bit;
 269 
 270         box = container_of(hrtimer, struct intel_uncore_box, hrtimer);
 271         if (!box->n_active || box->cpu != smp_processor_id())
 272                 return HRTIMER_NORESTART;
 273         /*
 274          * disable local interrupt to prevent uncore_pmu_event_start/stop
 275          * to interrupt the update process
 276          */
 277         local_irq_save(flags);
 278 
 279         /*
 280          * handle boxes with an active event list as opposed to active
 281          * counters
 282          */
 283         list_for_each_entry(event, &box->active_list, active_entry) {
 284                 uncore_perf_event_update(box, event);
 285         }
 286 
 287         for_each_set_bit(bit, box->active_mask, UNCORE_PMC_IDX_MAX)
 288                 uncore_perf_event_update(box, box->events[bit]);
 289 
 290         local_irq_restore(flags);
 291 
 292         hrtimer_forward_now(hrtimer, ns_to_ktime(box->hrtimer_duration));
 293         return HRTIMER_RESTART;
 294 }
 295 
 296 void uncore_pmu_start_hrtimer(struct intel_uncore_box *box)
 297 {
 298         hrtimer_start(&box->hrtimer, ns_to_ktime(box->hrtimer_duration),
 299                       HRTIMER_MODE_REL_PINNED);
 300 }
 301 
 302 void uncore_pmu_cancel_hrtimer(struct intel_uncore_box *box)
 303 {
 304         hrtimer_cancel(&box->hrtimer);
 305 }
 306 
 307 static void uncore_pmu_init_hrtimer(struct intel_uncore_box *box)
 308 {
 309         hrtimer_init(&box->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 310         box->hrtimer.function = uncore_pmu_hrtimer;
 311 }
 312 
 313 static struct intel_uncore_box *uncore_alloc_box(struct intel_uncore_type *type,
 314                                                  int node)
 315 {
 316         int i, size, numshared = type->num_shared_regs ;
 317         struct intel_uncore_box *box;
 318 
 319         size = sizeof(*box) + numshared * sizeof(struct intel_uncore_extra_reg);
 320 
 321         box = kzalloc_node(size, GFP_KERNEL, node);
 322         if (!box)
 323                 return NULL;
 324 
 325         for (i = 0; i < numshared; i++)
 326                 raw_spin_lock_init(&box->shared_regs[i].lock);
 327 
 328         uncore_pmu_init_hrtimer(box);
 329         box->cpu = -1;
 330         box->pci_phys_id = -1;
 331         box->dieid = -1;
 332 
 333         /* set default hrtimer timeout */
 334         box->hrtimer_duration = UNCORE_PMU_HRTIMER_INTERVAL;
 335 
 336         INIT_LIST_HEAD(&box->active_list);
 337 
 338         return box;
 339 }
 340 
 341 /*
 342  * Using uncore_pmu_event_init pmu event_init callback
 343  * as a detection point for uncore events.
 344  */
 345 static int uncore_pmu_event_init(struct perf_event *event);
 346 
 347 static bool is_box_event(struct intel_uncore_box *box, struct perf_event *event)
 348 {
 349         return &box->pmu->pmu == event->pmu;
 350 }
 351 
 352 static int
 353 uncore_collect_events(struct intel_uncore_box *box, struct perf_event *leader,
 354                       bool dogrp)
 355 {
 356         struct perf_event *event;
 357         int n, max_count;
 358 
 359         max_count = box->pmu->type->num_counters;
 360         if (box->pmu->type->fixed_ctl)
 361                 max_count++;
 362 
 363         if (box->n_events >= max_count)
 364                 return -EINVAL;
 365 
 366         n = box->n_events;
 367 
 368         if (is_box_event(box, leader)) {
 369                 box->event_list[n] = leader;
 370                 n++;
 371         }
 372 
 373         if (!dogrp)
 374                 return n;
 375 
 376         for_each_sibling_event(event, leader) {
 377                 if (!is_box_event(box, event) ||
 378                     event->state <= PERF_EVENT_STATE_OFF)
 379                         continue;
 380 
 381                 if (n >= max_count)
 382                         return -EINVAL;
 383 
 384                 box->event_list[n] = event;
 385                 n++;
 386         }
 387         return n;
 388 }
 389 
 390 static struct event_constraint *
 391 uncore_get_event_constraint(struct intel_uncore_box *box, struct perf_event *event)
 392 {
 393         struct intel_uncore_type *type = box->pmu->type;
 394         struct event_constraint *c;
 395 
 396         if (type->ops->get_constraint) {
 397                 c = type->ops->get_constraint(box, event);
 398                 if (c)
 399                         return c;
 400         }
 401 
 402         if (event->attr.config == UNCORE_FIXED_EVENT)
 403                 return &uncore_constraint_fixed;
 404 
 405         if (type->constraints) {
 406                 for_each_event_constraint(c, type->constraints) {
 407                         if ((event->hw.config & c->cmask) == c->code)
 408                                 return c;
 409                 }
 410         }
 411 
 412         return &type->unconstrainted;
 413 }
 414 
 415 static void uncore_put_event_constraint(struct intel_uncore_box *box,
 416                                         struct perf_event *event)
 417 {
 418         if (box->pmu->type->ops->put_constraint)
 419                 box->pmu->type->ops->put_constraint(box, event);
 420 }
 421 
 422 static int uncore_assign_events(struct intel_uncore_box *box, int assign[], int n)
 423 {
 424         unsigned long used_mask[BITS_TO_LONGS(UNCORE_PMC_IDX_MAX)];
 425         struct event_constraint *c;
 426         int i, wmin, wmax, ret = 0;
 427         struct hw_perf_event *hwc;
 428 
 429         bitmap_zero(used_mask, UNCORE_PMC_IDX_MAX);
 430 
 431         for (i = 0, wmin = UNCORE_PMC_IDX_MAX, wmax = 0; i < n; i++) {
 432                 c = uncore_get_event_constraint(box, box->event_list[i]);
 433                 box->event_constraint[i] = c;
 434                 wmin = min(wmin, c->weight);
 435                 wmax = max(wmax, c->weight);
 436         }
 437 
 438         /* fastpath, try to reuse previous register */
 439         for (i = 0; i < n; i++) {
 440                 hwc = &box->event_list[i]->hw;
 441                 c = box->event_constraint[i];
 442 
 443                 /* never assigned */
 444                 if (hwc->idx == -1)
 445                         break;
 446 
 447                 /* constraint still honored */
 448                 if (!test_bit(hwc->idx, c->idxmsk))
 449                         break;
 450 
 451                 /* not already used */
 452                 if (test_bit(hwc->idx, used_mask))
 453                         break;
 454 
 455                 __set_bit(hwc->idx, used_mask);
 456                 if (assign)
 457                         assign[i] = hwc->idx;
 458         }
 459         /* slow path */
 460         if (i != n)
 461                 ret = perf_assign_events(box->event_constraint, n,
 462                                          wmin, wmax, n, assign);
 463 
 464         if (!assign || ret) {
 465                 for (i = 0; i < n; i++)
 466                         uncore_put_event_constraint(box, box->event_list[i]);
 467         }
 468         return ret ? -EINVAL : 0;
 469 }
 470 
 471 void uncore_pmu_event_start(struct perf_event *event, int flags)
 472 {
 473         struct intel_uncore_box *box = uncore_event_to_box(event);
 474         int idx = event->hw.idx;
 475 
 476         if (WARN_ON_ONCE(idx == -1 || idx >= UNCORE_PMC_IDX_MAX))
 477                 return;
 478 
 479         /*
 480          * Free running counter is read-only and always active.
 481          * Use the current counter value as start point.
 482          * There is no overflow interrupt for free running counter.
 483          * Use hrtimer to periodically poll the counter to avoid overflow.
 484          */
 485         if (uncore_pmc_freerunning(event->hw.idx)) {
 486                 list_add_tail(&event->active_entry, &box->active_list);
 487                 local64_set(&event->hw.prev_count,
 488                             uncore_read_counter(box, event));
 489                 if (box->n_active++ == 0)
 490                         uncore_pmu_start_hrtimer(box);
 491                 return;
 492         }
 493 
 494         if (WARN_ON_ONCE(!(event->hw.state & PERF_HES_STOPPED)))
 495                 return;
 496 
 497         event->hw.state = 0;
 498         box->events[idx] = event;
 499         box->n_active++;
 500         __set_bit(idx, box->active_mask);
 501 
 502         local64_set(&event->hw.prev_count, uncore_read_counter(box, event));
 503         uncore_enable_event(box, event);
 504 
 505         if (box->n_active == 1)
 506                 uncore_pmu_start_hrtimer(box);
 507 }
 508 
 509 void uncore_pmu_event_stop(struct perf_event *event, int flags)
 510 {
 511         struct intel_uncore_box *box = uncore_event_to_box(event);
 512         struct hw_perf_event *hwc = &event->hw;
 513 
 514         /* Cannot disable free running counter which is read-only */
 515         if (uncore_pmc_freerunning(hwc->idx)) {
 516                 list_del(&event->active_entry);
 517                 if (--box->n_active == 0)
 518                         uncore_pmu_cancel_hrtimer(box);
 519                 uncore_perf_event_update(box, event);
 520                 return;
 521         }
 522 
 523         if (__test_and_clear_bit(hwc->idx, box->active_mask)) {
 524                 uncore_disable_event(box, event);
 525                 box->n_active--;
 526                 box->events[hwc->idx] = NULL;
 527                 WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
 528                 hwc->state |= PERF_HES_STOPPED;
 529 
 530                 if (box->n_active == 0)
 531                         uncore_pmu_cancel_hrtimer(box);
 532         }
 533 
 534         if ((flags & PERF_EF_UPDATE) && !(hwc->state & PERF_HES_UPTODATE)) {
 535                 /*
 536                  * Drain the remaining delta count out of a event
 537                  * that we are disabling:
 538                  */
 539                 uncore_perf_event_update(box, event);
 540                 hwc->state |= PERF_HES_UPTODATE;
 541         }
 542 }
 543 
 544 int uncore_pmu_event_add(struct perf_event *event, int flags)
 545 {
 546         struct intel_uncore_box *box = uncore_event_to_box(event);
 547         struct hw_perf_event *hwc = &event->hw;
 548         int assign[UNCORE_PMC_IDX_MAX];
 549         int i, n, ret;
 550 
 551         if (!box)
 552                 return -ENODEV;
 553 
 554         /*
 555          * The free funning counter is assigned in event_init().
 556          * The free running counter event and free running counter
 557          * are 1:1 mapped. It doesn't need to be tracked in event_list.
 558          */
 559         if (uncore_pmc_freerunning(hwc->idx)) {
 560                 if (flags & PERF_EF_START)
 561                         uncore_pmu_event_start(event, 0);
 562                 return 0;
 563         }
 564 
 565         ret = n = uncore_collect_events(box, event, false);
 566         if (ret < 0)
 567                 return ret;
 568 
 569         hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
 570         if (!(flags & PERF_EF_START))
 571                 hwc->state |= PERF_HES_ARCH;
 572 
 573         ret = uncore_assign_events(box, assign, n);
 574         if (ret)
 575                 return ret;
 576 
 577         /* save events moving to new counters */
 578         for (i = 0; i < box->n_events; i++) {
 579                 event = box->event_list[i];
 580                 hwc = &event->hw;
 581 
 582                 if (hwc->idx == assign[i] &&
 583                         hwc->last_tag == box->tags[assign[i]])
 584                         continue;
 585                 /*
 586                  * Ensure we don't accidentally enable a stopped
 587                  * counter simply because we rescheduled.
 588                  */
 589                 if (hwc->state & PERF_HES_STOPPED)
 590                         hwc->state |= PERF_HES_ARCH;
 591 
 592                 uncore_pmu_event_stop(event, PERF_EF_UPDATE);
 593         }
 594 
 595         /* reprogram moved events into new counters */
 596         for (i = 0; i < n; i++) {
 597                 event = box->event_list[i];
 598                 hwc = &event->hw;
 599 
 600                 if (hwc->idx != assign[i] ||
 601                         hwc->last_tag != box->tags[assign[i]])
 602                         uncore_assign_hw_event(box, event, assign[i]);
 603                 else if (i < box->n_events)
 604                         continue;
 605 
 606                 if (hwc->state & PERF_HES_ARCH)
 607                         continue;
 608 
 609                 uncore_pmu_event_start(event, 0);
 610         }
 611         box->n_events = n;
 612 
 613         return 0;
 614 }
 615 
 616 void uncore_pmu_event_del(struct perf_event *event, int flags)
 617 {
 618         struct intel_uncore_box *box = uncore_event_to_box(event);
 619         int i;
 620 
 621         uncore_pmu_event_stop(event, PERF_EF_UPDATE);
 622 
 623         /*
 624          * The event for free running counter is not tracked by event_list.
 625          * It doesn't need to force event->hw.idx = -1 to reassign the counter.
 626          * Because the event and the free running counter are 1:1 mapped.
 627          */
 628         if (uncore_pmc_freerunning(event->hw.idx))
 629                 return;
 630 
 631         for (i = 0; i < box->n_events; i++) {
 632                 if (event == box->event_list[i]) {
 633                         uncore_put_event_constraint(box, event);
 634 
 635                         for (++i; i < box->n_events; i++)
 636                                 box->event_list[i - 1] = box->event_list[i];
 637 
 638                         --box->n_events;
 639                         break;
 640                 }
 641         }
 642 
 643         event->hw.idx = -1;
 644         event->hw.last_tag = ~0ULL;
 645 }
 646 
 647 void uncore_pmu_event_read(struct perf_event *event)
 648 {
 649         struct intel_uncore_box *box = uncore_event_to_box(event);
 650         uncore_perf_event_update(box, event);
 651 }
 652 
 653 /*
 654  * validation ensures the group can be loaded onto the
 655  * PMU if it was the only group available.
 656  */
 657 static int uncore_validate_group(struct intel_uncore_pmu *pmu,
 658                                 struct perf_event *event)
 659 {
 660         struct perf_event *leader = event->group_leader;
 661         struct intel_uncore_box *fake_box;
 662         int ret = -EINVAL, n;
 663 
 664         /* The free running counter is always active. */
 665         if (uncore_pmc_freerunning(event->hw.idx))
 666                 return 0;
 667 
 668         fake_box = uncore_alloc_box(pmu->type, NUMA_NO_NODE);
 669         if (!fake_box)
 670                 return -ENOMEM;
 671 
 672         fake_box->pmu = pmu;
 673         /*
 674          * the event is not yet connected with its
 675          * siblings therefore we must first collect
 676          * existing siblings, then add the new event
 677          * before we can simulate the scheduling
 678          */
 679         n = uncore_collect_events(fake_box, leader, true);
 680         if (n < 0)
 681                 goto out;
 682 
 683         fake_box->n_events = n;
 684         n = uncore_collect_events(fake_box, event, false);
 685         if (n < 0)
 686                 goto out;
 687 
 688         fake_box->n_events = n;
 689 
 690         ret = uncore_assign_events(fake_box, NULL, n);
 691 out:
 692         kfree(fake_box);
 693         return ret;
 694 }
 695 
 696 static int uncore_pmu_event_init(struct perf_event *event)
 697 {
 698         struct intel_uncore_pmu *pmu;
 699         struct intel_uncore_box *box;
 700         struct hw_perf_event *hwc = &event->hw;
 701         int ret;
 702 
 703         if (event->attr.type != event->pmu->type)
 704                 return -ENOENT;
 705 
 706         pmu = uncore_event_to_pmu(event);
 707         /* no device found for this pmu */
 708         if (pmu->func_id < 0)
 709                 return -ENOENT;
 710 
 711         /* Sampling not supported yet */
 712         if (hwc->sample_period)
 713                 return -EINVAL;
 714 
 715         /*
 716          * Place all uncore events for a particular physical package
 717          * onto a single cpu
 718          */
 719         if (event->cpu < 0)
 720                 return -EINVAL;
 721         box = uncore_pmu_to_box(pmu, event->cpu);
 722         if (!box || box->cpu < 0)
 723                 return -EINVAL;
 724         event->cpu = box->cpu;
 725         event->pmu_private = box;
 726 
 727         event->event_caps |= PERF_EV_CAP_READ_ACTIVE_PKG;
 728 
 729         event->hw.idx = -1;
 730         event->hw.last_tag = ~0ULL;
 731         event->hw.extra_reg.idx = EXTRA_REG_NONE;
 732         event->hw.branch_reg.idx = EXTRA_REG_NONE;
 733 
 734         if (event->attr.config == UNCORE_FIXED_EVENT) {
 735                 /* no fixed counter */
 736                 if (!pmu->type->fixed_ctl)
 737                         return -EINVAL;
 738                 /*
 739                  * if there is only one fixed counter, only the first pmu
 740                  * can access the fixed counter
 741                  */
 742                 if (pmu->type->single_fixed && pmu->pmu_idx > 0)
 743                         return -EINVAL;
 744 
 745                 /* fixed counters have event field hardcoded to zero */
 746                 hwc->config = 0ULL;
 747         } else if (is_freerunning_event(event)) {
 748                 hwc->config = event->attr.config;
 749                 if (!check_valid_freerunning_event(box, event))
 750                         return -EINVAL;
 751                 event->hw.idx = UNCORE_PMC_IDX_FREERUNNING;
 752                 /*
 753                  * The free running counter event and free running counter
 754                  * are always 1:1 mapped.
 755                  * The free running counter is always active.
 756                  * Assign the free running counter here.
 757                  */
 758                 event->hw.event_base = uncore_freerunning_counter(box, event);
 759         } else {
 760                 hwc->config = event->attr.config &
 761                               (pmu->type->event_mask | ((u64)pmu->type->event_mask_ext << 32));
 762                 if (pmu->type->ops->hw_config) {
 763                         ret = pmu->type->ops->hw_config(box, event);
 764                         if (ret)
 765                                 return ret;
 766                 }
 767         }
 768 
 769         if (event->group_leader != event)
 770                 ret = uncore_validate_group(pmu, event);
 771         else
 772                 ret = 0;
 773 
 774         return ret;
 775 }
 776 
 777 static void uncore_pmu_enable(struct pmu *pmu)
 778 {
 779         struct intel_uncore_pmu *uncore_pmu;
 780         struct intel_uncore_box *box;
 781 
 782         uncore_pmu = container_of(pmu, struct intel_uncore_pmu, pmu);
 783         if (!uncore_pmu)
 784                 return;
 785 
 786         box = uncore_pmu_to_box(uncore_pmu, smp_processor_id());
 787         if (!box)
 788                 return;
 789 
 790         if (uncore_pmu->type->ops->enable_box)
 791                 uncore_pmu->type->ops->enable_box(box);
 792 }
 793 
 794 static void uncore_pmu_disable(struct pmu *pmu)
 795 {
 796         struct intel_uncore_pmu *uncore_pmu;
 797         struct intel_uncore_box *box;
 798 
 799         uncore_pmu = container_of(pmu, struct intel_uncore_pmu, pmu);
 800         if (!uncore_pmu)
 801                 return;
 802 
 803         box = uncore_pmu_to_box(uncore_pmu, smp_processor_id());
 804         if (!box)
 805                 return;
 806 
 807         if (uncore_pmu->type->ops->disable_box)
 808                 uncore_pmu->type->ops->disable_box(box);
 809 }
 810 
 811 static ssize_t uncore_get_attr_cpumask(struct device *dev,
 812                                 struct device_attribute *attr, char *buf)
 813 {
 814         return cpumap_print_to_pagebuf(true, buf, &uncore_cpu_mask);
 815 }
 816 
 817 static DEVICE_ATTR(cpumask, S_IRUGO, uncore_get_attr_cpumask, NULL);
 818 
 819 static struct attribute *uncore_pmu_attrs[] = {
 820         &dev_attr_cpumask.attr,
 821         NULL,
 822 };
 823 
 824 static const struct attribute_group uncore_pmu_attr_group = {
 825         .attrs = uncore_pmu_attrs,
 826 };
 827 
 828 static int uncore_pmu_register(struct intel_uncore_pmu *pmu)
 829 {
 830         int ret;
 831 
 832         if (!pmu->type->pmu) {
 833                 pmu->pmu = (struct pmu) {
 834                         .attr_groups    = pmu->type->attr_groups,
 835                         .task_ctx_nr    = perf_invalid_context,
 836                         .pmu_enable     = uncore_pmu_enable,
 837                         .pmu_disable    = uncore_pmu_disable,
 838                         .event_init     = uncore_pmu_event_init,
 839                         .add            = uncore_pmu_event_add,
 840                         .del            = uncore_pmu_event_del,
 841                         .start          = uncore_pmu_event_start,
 842                         .stop           = uncore_pmu_event_stop,
 843                         .read           = uncore_pmu_event_read,
 844                         .module         = THIS_MODULE,
 845                         .capabilities   = PERF_PMU_CAP_NO_EXCLUDE,
 846                 };
 847         } else {
 848                 pmu->pmu = *pmu->type->pmu;
 849                 pmu->pmu.attr_groups = pmu->type->attr_groups;
 850         }
 851 
 852         if (pmu->type->num_boxes == 1) {
 853                 if (strlen(pmu->type->name) > 0)
 854                         sprintf(pmu->name, "uncore_%s", pmu->type->name);
 855                 else
 856                         sprintf(pmu->name, "uncore");
 857         } else {
 858                 sprintf(pmu->name, "uncore_%s_%d", pmu->type->name,
 859                         pmu->pmu_idx);
 860         }
 861 
 862         ret = perf_pmu_register(&pmu->pmu, pmu->name, -1);
 863         if (!ret)
 864                 pmu->registered = true;
 865         return ret;
 866 }
 867 
 868 static void uncore_pmu_unregister(struct intel_uncore_pmu *pmu)
 869 {
 870         if (!pmu->registered)
 871                 return;
 872         perf_pmu_unregister(&pmu->pmu);
 873         pmu->registered = false;
 874 }
 875 
 876 static void uncore_free_boxes(struct intel_uncore_pmu *pmu)
 877 {
 878         int die;
 879 
 880         for (die = 0; die < max_dies; die++)
 881                 kfree(pmu->boxes[die]);
 882         kfree(pmu->boxes);
 883 }
 884 
 885 static void uncore_type_exit(struct intel_uncore_type *type)
 886 {
 887         struct intel_uncore_pmu *pmu = type->pmus;
 888         int i;
 889 
 890         if (pmu) {
 891                 for (i = 0; i < type->num_boxes; i++, pmu++) {
 892                         uncore_pmu_unregister(pmu);
 893                         uncore_free_boxes(pmu);
 894                 }
 895                 kfree(type->pmus);
 896                 type->pmus = NULL;
 897         }
 898         kfree(type->events_group);
 899         type->events_group = NULL;
 900 }
 901 
 902 static void uncore_types_exit(struct intel_uncore_type **types)
 903 {
 904         for (; *types; types++)
 905                 uncore_type_exit(*types);
 906 }
 907 
 908 static int __init uncore_type_init(struct intel_uncore_type *type, bool setid)
 909 {
 910         struct intel_uncore_pmu *pmus;
 911         size_t size;
 912         int i, j;
 913 
 914         pmus = kcalloc(type->num_boxes, sizeof(*pmus), GFP_KERNEL);
 915         if (!pmus)
 916                 return -ENOMEM;
 917 
 918         size = max_dies * sizeof(struct intel_uncore_box *);
 919 
 920         for (i = 0; i < type->num_boxes; i++) {
 921                 pmus[i].func_id = setid ? i : -1;
 922                 pmus[i].pmu_idx = i;
 923                 pmus[i].type    = type;
 924                 pmus[i].boxes   = kzalloc(size, GFP_KERNEL);
 925                 if (!pmus[i].boxes)
 926                         goto err;
 927         }
 928 
 929         type->pmus = pmus;
 930         type->unconstrainted = (struct event_constraint)
 931                 __EVENT_CONSTRAINT(0, (1ULL << type->num_counters) - 1,
 932                                 0, type->num_counters, 0, 0);
 933 
 934         if (type->event_descs) {
 935                 struct {
 936                         struct attribute_group group;
 937                         struct attribute *attrs[];
 938                 } *attr_group;
 939                 for (i = 0; type->event_descs[i].attr.attr.name; i++);
 940 
 941                 attr_group = kzalloc(struct_size(attr_group, attrs, i + 1),
 942                                                                 GFP_KERNEL);
 943                 if (!attr_group)
 944                         goto err;
 945 
 946                 attr_group->group.name = "events";
 947                 attr_group->group.attrs = attr_group->attrs;
 948 
 949                 for (j = 0; j < i; j++)
 950                         attr_group->attrs[j] = &type->event_descs[j].attr.attr;
 951 
 952                 type->events_group = &attr_group->group;
 953         }
 954 
 955         type->pmu_group = &uncore_pmu_attr_group;
 956 
 957         return 0;
 958 
 959 err:
 960         for (i = 0; i < type->num_boxes; i++)
 961                 kfree(pmus[i].boxes);
 962         kfree(pmus);
 963 
 964         return -ENOMEM;
 965 }
 966 
 967 static int __init
 968 uncore_types_init(struct intel_uncore_type **types, bool setid)
 969 {
 970         int ret;
 971 
 972         for (; *types; types++) {
 973                 ret = uncore_type_init(*types, setid);
 974                 if (ret)
 975                         return ret;
 976         }
 977         return 0;
 978 }
 979 
 980 /*
 981  * add a pci uncore device
 982  */
 983 static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 984 {
 985         struct intel_uncore_type *type;
 986         struct intel_uncore_pmu *pmu = NULL;
 987         struct intel_uncore_box *box;
 988         int phys_id, die, ret;
 989 
 990         phys_id = uncore_pcibus_to_physid(pdev->bus);
 991         if (phys_id < 0)
 992                 return -ENODEV;
 993 
 994         die = (topology_max_die_per_package() > 1) ? phys_id :
 995                                         topology_phys_to_logical_pkg(phys_id);
 996         if (die < 0)
 997                 return -EINVAL;
 998 
 999         if (UNCORE_PCI_DEV_TYPE(id->driver_data) == UNCORE_EXTRA_PCI_DEV) {
1000                 int idx = UNCORE_PCI_DEV_IDX(id->driver_data);
1001 
1002                 uncore_extra_pci_dev[die].dev[idx] = pdev;
1003                 pci_set_drvdata(pdev, NULL);
1004                 return 0;
1005         }
1006 
1007         type = uncore_pci_uncores[UNCORE_PCI_DEV_TYPE(id->driver_data)];
1008 
1009         /*
1010          * Some platforms, e.g.  Knights Landing, use a common PCI device ID
1011          * for multiple instances of an uncore PMU device type. We should check
1012          * PCI slot and func to indicate the uncore box.
1013          */
1014         if (id->driver_data & ~0xffff) {
1015                 struct pci_driver *pci_drv = pdev->driver;
1016                 const struct pci_device_id *ids = pci_drv->id_table;
1017                 unsigned int devfn;
1018 
1019                 while (ids && ids->vendor) {
1020                         if ((ids->vendor == pdev->vendor) &&
1021                             (ids->device == pdev->device)) {
1022                                 devfn = PCI_DEVFN(UNCORE_PCI_DEV_DEV(ids->driver_data),
1023                                                   UNCORE_PCI_DEV_FUNC(ids->driver_data));
1024                                 if (devfn == pdev->devfn) {
1025                                         pmu = &type->pmus[UNCORE_PCI_DEV_IDX(ids->driver_data)];
1026                                         break;
1027                                 }
1028                         }
1029                         ids++;
1030                 }
1031                 if (pmu == NULL)
1032                         return -ENODEV;
1033         } else {
1034                 /*
1035                  * for performance monitoring unit with multiple boxes,
1036                  * each box has a different function id.
1037                  */
1038                 pmu = &type->pmus[UNCORE_PCI_DEV_IDX(id->driver_data)];
1039         }
1040 
1041         if (WARN_ON_ONCE(pmu->boxes[die] != NULL))
1042                 return -EINVAL;
1043 
1044         box = uncore_alloc_box(type, NUMA_NO_NODE);
1045         if (!box)
1046                 return -ENOMEM;
1047 
1048         if (pmu->func_id < 0)
1049                 pmu->func_id = pdev->devfn;
1050         else
1051                 WARN_ON_ONCE(pmu->func_id != pdev->devfn);
1052 
1053         atomic_inc(&box->refcnt);
1054         box->pci_phys_id = phys_id;
1055         box->dieid = die;
1056         box->pci_dev = pdev;
1057         box->pmu = pmu;
1058         uncore_box_init(box);
1059         pci_set_drvdata(pdev, box);
1060 
1061         pmu->boxes[die] = box;
1062         if (atomic_inc_return(&pmu->activeboxes) > 1)
1063                 return 0;
1064 
1065         /* First active box registers the pmu */
1066         ret = uncore_pmu_register(pmu);
1067         if (ret) {
1068                 pci_set_drvdata(pdev, NULL);
1069                 pmu->boxes[die] = NULL;
1070                 uncore_box_exit(box);
1071                 kfree(box);
1072         }
1073         return ret;
1074 }
1075 
1076 static void uncore_pci_remove(struct pci_dev *pdev)
1077 {
1078         struct intel_uncore_box *box;
1079         struct intel_uncore_pmu *pmu;
1080         int i, phys_id, die;
1081 
1082         phys_id = uncore_pcibus_to_physid(pdev->bus);
1083 
1084         box = pci_get_drvdata(pdev);
1085         if (!box) {
1086                 die = (topology_max_die_per_package() > 1) ? phys_id :
1087                                         topology_phys_to_logical_pkg(phys_id);
1088                 for (i = 0; i < UNCORE_EXTRA_PCI_DEV_MAX; i++) {
1089                         if (uncore_extra_pci_dev[die].dev[i] == pdev) {
1090                                 uncore_extra_pci_dev[die].dev[i] = NULL;
1091                                 break;
1092                         }
1093                 }
1094                 WARN_ON_ONCE(i >= UNCORE_EXTRA_PCI_DEV_MAX);
1095                 return;
1096         }
1097 
1098         pmu = box->pmu;
1099         if (WARN_ON_ONCE(phys_id != box->pci_phys_id))
1100                 return;
1101 
1102         pci_set_drvdata(pdev, NULL);
1103         pmu->boxes[box->dieid] = NULL;
1104         if (atomic_dec_return(&pmu->activeboxes) == 0)
1105                 uncore_pmu_unregister(pmu);
1106         uncore_box_exit(box);
1107         kfree(box);
1108 }
1109 
1110 static int __init uncore_pci_init(void)
1111 {
1112         size_t size;
1113         int ret;
1114 
1115         size = max_dies * sizeof(struct pci_extra_dev);
1116         uncore_extra_pci_dev = kzalloc(size, GFP_KERNEL);
1117         if (!uncore_extra_pci_dev) {
1118                 ret = -ENOMEM;
1119                 goto err;
1120         }
1121 
1122         ret = uncore_types_init(uncore_pci_uncores, false);
1123         if (ret)
1124                 goto errtype;
1125 
1126         uncore_pci_driver->probe = uncore_pci_probe;
1127         uncore_pci_driver->remove = uncore_pci_remove;
1128 
1129         ret = pci_register_driver(uncore_pci_driver);
1130         if (ret)
1131                 goto errtype;
1132 
1133         pcidrv_registered = true;
1134         return 0;
1135 
1136 errtype:
1137         uncore_types_exit(uncore_pci_uncores);
1138         kfree(uncore_extra_pci_dev);
1139         uncore_extra_pci_dev = NULL;
1140         uncore_free_pcibus_map();
1141 err:
1142         uncore_pci_uncores = empty_uncore;
1143         return ret;
1144 }
1145 
1146 static void uncore_pci_exit(void)
1147 {
1148         if (pcidrv_registered) {
1149                 pcidrv_registered = false;
1150                 pci_unregister_driver(uncore_pci_driver);
1151                 uncore_types_exit(uncore_pci_uncores);
1152                 kfree(uncore_extra_pci_dev);
1153                 uncore_free_pcibus_map();
1154         }
1155 }
1156 
1157 static void uncore_change_type_ctx(struct intel_uncore_type *type, int old_cpu,
1158                                    int new_cpu)
1159 {
1160         struct intel_uncore_pmu *pmu = type->pmus;
1161         struct intel_uncore_box *box;
1162         int i, die;
1163 
1164         die = topology_logical_die_id(old_cpu < 0 ? new_cpu : old_cpu);
1165         for (i = 0; i < type->num_boxes; i++, pmu++) {
1166                 box = pmu->boxes[die];
1167                 if (!box)
1168                         continue;
1169 
1170                 if (old_cpu < 0) {
1171                         WARN_ON_ONCE(box->cpu != -1);
1172                         box->cpu = new_cpu;
1173                         continue;
1174                 }
1175 
1176                 WARN_ON_ONCE(box->cpu != old_cpu);
1177                 box->cpu = -1;
1178                 if (new_cpu < 0)
1179                         continue;
1180 
1181                 uncore_pmu_cancel_hrtimer(box);
1182                 perf_pmu_migrate_context(&pmu->pmu, old_cpu, new_cpu);
1183                 box->cpu = new_cpu;
1184         }
1185 }
1186 
1187 static void uncore_change_context(struct intel_uncore_type **uncores,
1188                                   int old_cpu, int new_cpu)
1189 {
1190         for (; *uncores; uncores++)
1191                 uncore_change_type_ctx(*uncores, old_cpu, new_cpu);
1192 }
1193 
1194 static void uncore_box_unref(struct intel_uncore_type **types, int id)
1195 {
1196         struct intel_uncore_type *type;
1197         struct intel_uncore_pmu *pmu;
1198         struct intel_uncore_box *box;
1199         int i;
1200 
1201         for (; *types; types++) {
1202                 type = *types;
1203                 pmu = type->pmus;
1204                 for (i = 0; i < type->num_boxes; i++, pmu++) {
1205                         box = pmu->boxes[id];
1206                         if (box && atomic_dec_return(&box->refcnt) == 0)
1207                                 uncore_box_exit(box);
1208                 }
1209         }
1210 }
1211 
1212 static int uncore_event_cpu_offline(unsigned int cpu)
1213 {
1214         int die, target;
1215 
1216         /* Check if exiting cpu is used for collecting uncore events */
1217         if (!cpumask_test_and_clear_cpu(cpu, &uncore_cpu_mask))
1218                 goto unref;
1219         /* Find a new cpu to collect uncore events */
1220         target = cpumask_any_but(topology_die_cpumask(cpu), cpu);
1221 
1222         /* Migrate uncore events to the new target */
1223         if (target < nr_cpu_ids)
1224                 cpumask_set_cpu(target, &uncore_cpu_mask);
1225         else
1226                 target = -1;
1227 
1228         uncore_change_context(uncore_msr_uncores, cpu, target);
1229         uncore_change_context(uncore_mmio_uncores, cpu, target);
1230         uncore_change_context(uncore_pci_uncores, cpu, target);
1231 
1232 unref:
1233         /* Clear the references */
1234         die = topology_logical_die_id(cpu);
1235         uncore_box_unref(uncore_msr_uncores, die);
1236         uncore_box_unref(uncore_mmio_uncores, die);
1237         return 0;
1238 }
1239 
1240 static int allocate_boxes(struct intel_uncore_type **types,
1241                          unsigned int die, unsigned int cpu)
1242 {
1243         struct intel_uncore_box *box, *tmp;
1244         struct intel_uncore_type *type;
1245         struct intel_uncore_pmu *pmu;
1246         LIST_HEAD(allocated);
1247         int i;
1248 
1249         /* Try to allocate all required boxes */
1250         for (; *types; types++) {
1251                 type = *types;
1252                 pmu = type->pmus;
1253                 for (i = 0; i < type->num_boxes; i++, pmu++) {
1254                         if (pmu->boxes[die])
1255                                 continue;
1256                         box = uncore_alloc_box(type, cpu_to_node(cpu));
1257                         if (!box)
1258                                 goto cleanup;
1259                         box->pmu = pmu;
1260                         box->dieid = die;
1261                         list_add(&box->active_list, &allocated);
1262                 }
1263         }
1264         /* Install them in the pmus */
1265         list_for_each_entry_safe(box, tmp, &allocated, active_list) {
1266                 list_del_init(&box->active_list);
1267                 box->pmu->boxes[die] = box;
1268         }
1269         return 0;
1270 
1271 cleanup:
1272         list_for_each_entry_safe(box, tmp, &allocated, active_list) {
1273                 list_del_init(&box->active_list);
1274                 kfree(box);
1275         }
1276         return -ENOMEM;
1277 }
1278 
1279 static int uncore_box_ref(struct intel_uncore_type **types,
1280                           int id, unsigned int cpu)
1281 {
1282         struct intel_uncore_type *type;
1283         struct intel_uncore_pmu *pmu;
1284         struct intel_uncore_box *box;
1285         int i, ret;
1286 
1287         ret = allocate_boxes(types, id, cpu);
1288         if (ret)
1289                 return ret;
1290 
1291         for (; *types; types++) {
1292                 type = *types;
1293                 pmu = type->pmus;
1294                 for (i = 0; i < type->num_boxes; i++, pmu++) {
1295                         box = pmu->boxes[id];
1296                         if (box && atomic_inc_return(&box->refcnt) == 1)
1297                                 uncore_box_init(box);
1298                 }
1299         }
1300         return 0;
1301 }
1302 
1303 static int uncore_event_cpu_online(unsigned int cpu)
1304 {
1305         int die, target, msr_ret, mmio_ret;
1306 
1307         die = topology_logical_die_id(cpu);
1308         msr_ret = uncore_box_ref(uncore_msr_uncores, die, cpu);
1309         mmio_ret = uncore_box_ref(uncore_mmio_uncores, die, cpu);
1310         if (msr_ret && mmio_ret)
1311                 return -ENOMEM;
1312 
1313         /*
1314          * Check if there is an online cpu in the package
1315          * which collects uncore events already.
1316          */
1317         target = cpumask_any_and(&uncore_cpu_mask, topology_die_cpumask(cpu));
1318         if (target < nr_cpu_ids)
1319                 return 0;
1320 
1321         cpumask_set_cpu(cpu, &uncore_cpu_mask);
1322 
1323         if (!msr_ret)
1324                 uncore_change_context(uncore_msr_uncores, -1, cpu);
1325         if (!mmio_ret)
1326                 uncore_change_context(uncore_mmio_uncores, -1, cpu);
1327         uncore_change_context(uncore_pci_uncores, -1, cpu);
1328         return 0;
1329 }
1330 
1331 static int __init type_pmu_register(struct intel_uncore_type *type)
1332 {
1333         int i, ret;
1334 
1335         for (i = 0; i < type->num_boxes; i++) {
1336                 ret = uncore_pmu_register(&type->pmus[i]);
1337                 if (ret)
1338                         return ret;
1339         }
1340         return 0;
1341 }
1342 
1343 static int __init uncore_msr_pmus_register(void)
1344 {
1345         struct intel_uncore_type **types = uncore_msr_uncores;
1346         int ret;
1347 
1348         for (; *types; types++) {
1349                 ret = type_pmu_register(*types);
1350                 if (ret)
1351                         return ret;
1352         }
1353         return 0;
1354 }
1355 
1356 static int __init uncore_cpu_init(void)
1357 {
1358         int ret;
1359 
1360         ret = uncore_types_init(uncore_msr_uncores, true);
1361         if (ret)
1362                 goto err;
1363 
1364         ret = uncore_msr_pmus_register();
1365         if (ret)
1366                 goto err;
1367         return 0;
1368 err:
1369         uncore_types_exit(uncore_msr_uncores);
1370         uncore_msr_uncores = empty_uncore;
1371         return ret;
1372 }
1373 
1374 static int __init uncore_mmio_init(void)
1375 {
1376         struct intel_uncore_type **types = uncore_mmio_uncores;
1377         int ret;
1378 
1379         ret = uncore_types_init(types, true);
1380         if (ret)
1381                 goto err;
1382 
1383         for (; *types; types++) {
1384                 ret = type_pmu_register(*types);
1385                 if (ret)
1386                         goto err;
1387         }
1388         return 0;
1389 err:
1390         uncore_types_exit(uncore_mmio_uncores);
1391         uncore_mmio_uncores = empty_uncore;
1392         return ret;
1393 }
1394 
1395 
1396 #define X86_UNCORE_MODEL_MATCH(model, init)     \
1397         { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&init }
1398 
1399 struct intel_uncore_init_fun {
1400         void    (*cpu_init)(void);
1401         int     (*pci_init)(void);
1402         void    (*mmio_init)(void);
1403 };
1404 
1405 static const struct intel_uncore_init_fun nhm_uncore_init __initconst = {
1406         .cpu_init = nhm_uncore_cpu_init,
1407 };
1408 
1409 static const struct intel_uncore_init_fun snb_uncore_init __initconst = {
1410         .cpu_init = snb_uncore_cpu_init,
1411         .pci_init = snb_uncore_pci_init,
1412 };
1413 
1414 static const struct intel_uncore_init_fun ivb_uncore_init __initconst = {
1415         .cpu_init = snb_uncore_cpu_init,
1416         .pci_init = ivb_uncore_pci_init,
1417 };
1418 
1419 static const struct intel_uncore_init_fun hsw_uncore_init __initconst = {
1420         .cpu_init = snb_uncore_cpu_init,
1421         .pci_init = hsw_uncore_pci_init,
1422 };
1423 
1424 static const struct intel_uncore_init_fun bdw_uncore_init __initconst = {
1425         .cpu_init = snb_uncore_cpu_init,
1426         .pci_init = bdw_uncore_pci_init,
1427 };
1428 
1429 static const struct intel_uncore_init_fun snbep_uncore_init __initconst = {
1430         .cpu_init = snbep_uncore_cpu_init,
1431         .pci_init = snbep_uncore_pci_init,
1432 };
1433 
1434 static const struct intel_uncore_init_fun nhmex_uncore_init __initconst = {
1435         .cpu_init = nhmex_uncore_cpu_init,
1436 };
1437 
1438 static const struct intel_uncore_init_fun ivbep_uncore_init __initconst = {
1439         .cpu_init = ivbep_uncore_cpu_init,
1440         .pci_init = ivbep_uncore_pci_init,
1441 };
1442 
1443 static const struct intel_uncore_init_fun hswep_uncore_init __initconst = {
1444         .cpu_init = hswep_uncore_cpu_init,
1445         .pci_init = hswep_uncore_pci_init,
1446 };
1447 
1448 static const struct intel_uncore_init_fun bdx_uncore_init __initconst = {
1449         .cpu_init = bdx_uncore_cpu_init,
1450         .pci_init = bdx_uncore_pci_init,
1451 };
1452 
1453 static const struct intel_uncore_init_fun knl_uncore_init __initconst = {
1454         .cpu_init = knl_uncore_cpu_init,
1455         .pci_init = knl_uncore_pci_init,
1456 };
1457 
1458 static const struct intel_uncore_init_fun skl_uncore_init __initconst = {
1459         .cpu_init = skl_uncore_cpu_init,
1460         .pci_init = skl_uncore_pci_init,
1461 };
1462 
1463 static const struct intel_uncore_init_fun skx_uncore_init __initconst = {
1464         .cpu_init = skx_uncore_cpu_init,
1465         .pci_init = skx_uncore_pci_init,
1466 };
1467 
1468 static const struct intel_uncore_init_fun icl_uncore_init __initconst = {
1469         .cpu_init = icl_uncore_cpu_init,
1470         .pci_init = skl_uncore_pci_init,
1471 };
1472 
1473 static const struct intel_uncore_init_fun snr_uncore_init __initconst = {
1474         .cpu_init = snr_uncore_cpu_init,
1475         .pci_init = snr_uncore_pci_init,
1476         .mmio_init = snr_uncore_mmio_init,
1477 };
1478 
1479 static const struct x86_cpu_id intel_uncore_match[] __initconst = {
1480         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_NEHALEM_EP,     nhm_uncore_init),
1481         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_NEHALEM,        nhm_uncore_init),
1482         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_WESTMERE,       nhm_uncore_init),
1483         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_WESTMERE_EP,    nhm_uncore_init),
1484         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SANDYBRIDGE,    snb_uncore_init),
1485         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_IVYBRIDGE,      ivb_uncore_init),
1486         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL,        hsw_uncore_init),
1487         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_L,      hsw_uncore_init),
1488         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_G,      hsw_uncore_init),
1489         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL,      bdw_uncore_init),
1490         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_G,    bdw_uncore_init),
1491         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SANDYBRIDGE_X,  snbep_uncore_init),
1492         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_NEHALEM_EX,     nhmex_uncore_init),
1493         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_WESTMERE_EX,    nhmex_uncore_init),
1494         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_IVYBRIDGE_X,    ivbep_uncore_init),
1495         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_X,      hswep_uncore_init),
1496         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_X,    bdx_uncore_init),
1497         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_D,    bdx_uncore_init),
1498         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_XEON_PHI_KNL,   knl_uncore_init),
1499         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_XEON_PHI_KNM,   knl_uncore_init),
1500         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SKYLAKE,        skl_uncore_init),
1501         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SKYLAKE_L,      skl_uncore_init),
1502         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SKYLAKE_X,      skx_uncore_init),
1503         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_KABYLAKE_L,     skl_uncore_init),
1504         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_KABYLAKE,       skl_uncore_init),
1505         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_ICELAKE_L,      icl_uncore_init),
1506         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_ICELAKE_NNPI,   icl_uncore_init),
1507         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_ICELAKE,        icl_uncore_init),
1508         X86_UNCORE_MODEL_MATCH(INTEL_FAM6_ATOM_TREMONT_D, snr_uncore_init),
1509         {},
1510 };
1511 
1512 MODULE_DEVICE_TABLE(x86cpu, intel_uncore_match);
1513 
1514 static int __init intel_uncore_init(void)
1515 {
1516         const struct x86_cpu_id *id;
1517         struct intel_uncore_init_fun *uncore_init;
1518         int pret = 0, cret = 0, mret = 0, ret;
1519 
1520         id = x86_match_cpu(intel_uncore_match);
1521         if (!id)
1522                 return -ENODEV;
1523 
1524         if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
1525                 return -ENODEV;
1526 
1527         max_dies = topology_max_packages() * topology_max_die_per_package();
1528 
1529         uncore_init = (struct intel_uncore_init_fun *)id->driver_data;
1530         if (uncore_init->pci_init) {
1531                 pret = uncore_init->pci_init();
1532                 if (!pret)
1533                         pret = uncore_pci_init();
1534         }
1535 
1536         if (uncore_init->cpu_init) {
1537                 uncore_init->cpu_init();
1538                 cret = uncore_cpu_init();
1539         }
1540 
1541         if (uncore_init->mmio_init) {
1542                 uncore_init->mmio_init();
1543                 mret = uncore_mmio_init();
1544         }
1545 
1546         if (cret && pret && mret)
1547                 return -ENODEV;
1548 
1549         /* Install hotplug callbacks to setup the targets for each package */
1550         ret = cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE,
1551                                 "perf/x86/intel/uncore:online",
1552                                 uncore_event_cpu_online,
1553                                 uncore_event_cpu_offline);
1554         if (ret)
1555                 goto err;
1556         return 0;
1557 
1558 err:
1559         uncore_types_exit(uncore_msr_uncores);
1560         uncore_types_exit(uncore_mmio_uncores);
1561         uncore_pci_exit();
1562         return ret;
1563 }
1564 module_init(intel_uncore_init);
1565 
1566 static void __exit intel_uncore_exit(void)
1567 {
1568         cpuhp_remove_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE);
1569         uncore_types_exit(uncore_msr_uncores);
1570         uncore_types_exit(uncore_mmio_uncores);
1571         uncore_pci_exit();
1572 }
1573 module_exit(intel_uncore_exit);
/* [<][>][^][v][top][bottom][index][help] */
root/arch/x86/events/intel/uncore.c

DEFINITIONS
