Linux 4.18.10
[linux/fpc-iii.git] / arch / x86 / events / intel / uncore.c
blob27a461414b306851d70ca2438d054a43d8aa9fed
1 #include <linux/module.h>
3 #include <asm/cpu_device_id.h>
4 #include <asm/intel-family.h>
5 #include "uncore.h"
7 static struct intel_uncore_type *empty_uncore[] = { NULL, };
8 struct intel_uncore_type **uncore_msr_uncores = empty_uncore;
9 struct intel_uncore_type **uncore_pci_uncores = empty_uncore;
11 static bool pcidrv_registered;
12 struct pci_driver *uncore_pci_driver;
13 /* pci bus to socket mapping */
14 DEFINE_RAW_SPINLOCK(pci2phy_map_lock);
15 struct list_head pci2phy_map_head = LIST_HEAD_INIT(pci2phy_map_head);
16 struct pci_extra_dev *uncore_extra_pci_dev;
17 static int max_packages;
19 /* mask of cpus that collect uncore events */
20 static cpumask_t uncore_cpu_mask;
22 /* constraint for the fixed counter */
23 static struct event_constraint uncore_constraint_fixed =
24 EVENT_CONSTRAINT(~0ULL, 1 << UNCORE_PMC_IDX_FIXED, ~0ULL);
25 struct event_constraint uncore_constraint_empty =
26 EVENT_CONSTRAINT(0, 0, 0);
28 MODULE_LICENSE("GPL");
30 static int uncore_pcibus_to_physid(struct pci_bus *bus)
32 struct pci2phy_map *map;
33 int phys_id = -1;
35 raw_spin_lock(&pci2phy_map_lock);
36 list_for_each_entry(map, &pci2phy_map_head, list) {
37 if (map->segment == pci_domain_nr(bus)) {
38 phys_id = map->pbus_to_physid[bus->number];
39 break;
42 raw_spin_unlock(&pci2phy_map_lock);
44 return phys_id;
47 static void uncore_free_pcibus_map(void)
49 struct pci2phy_map *map, *tmp;
51 list_for_each_entry_safe(map, tmp, &pci2phy_map_head, list) {
52 list_del(&map->list);
53 kfree(map);
57 struct pci2phy_map *__find_pci2phy_map(int segment)
59 struct pci2phy_map *map, *alloc = NULL;
60 int i;
62 lockdep_assert_held(&pci2phy_map_lock);
64 lookup:
65 list_for_each_entry(map, &pci2phy_map_head, list) {
66 if (map->segment == segment)
67 goto end;
70 if (!alloc) {
71 raw_spin_unlock(&pci2phy_map_lock);
72 alloc = kmalloc(sizeof(struct pci2phy_map), GFP_KERNEL);
73 raw_spin_lock(&pci2phy_map_lock);
75 if (!alloc)
76 return NULL;
78 goto lookup;
81 map = alloc;
82 alloc = NULL;
83 map->segment = segment;
84 for (i = 0; i < 256; i++)
85 map->pbus_to_physid[i] = -1;
86 list_add_tail(&map->list, &pci2phy_map_head);
88 end:
89 kfree(alloc);
90 return map;
93 ssize_t uncore_event_show(struct kobject *kobj,
94 struct kobj_attribute *attr, char *buf)
96 struct uncore_event_desc *event =
97 container_of(attr, struct uncore_event_desc, attr);
98 return sprintf(buf, "%s", event->config);
101 struct intel_uncore_box *uncore_pmu_to_box(struct intel_uncore_pmu *pmu, int cpu)
103 unsigned int pkgid = topology_logical_package_id(cpu);
106 * The unsigned check also catches the '-1' return value for non
107 * existent mappings in the topology map.
109 return pkgid < max_packages ? pmu->boxes[pkgid] : NULL;
112 u64 uncore_msr_read_counter(struct intel_uncore_box *box, struct perf_event *event)
114 u64 count;
116 rdmsrl(event->hw.event_base, count);
118 return count;
122 * generic get constraint function for shared match/mask registers.
124 struct event_constraint *
125 uncore_get_constraint(struct intel_uncore_box *box, struct perf_event *event)
127 struct intel_uncore_extra_reg *er;
128 struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
129 struct hw_perf_event_extra *reg2 = &event->hw.branch_reg;
130 unsigned long flags;
131 bool ok = false;
134 * reg->alloc can be set due to existing state, so for fake box we
135 * need to ignore this, otherwise we might fail to allocate proper
136 * fake state for this extra reg constraint.
138 if (reg1->idx == EXTRA_REG_NONE ||
139 (!uncore_box_is_fake(box) && reg1->alloc))
140 return NULL;
142 er = &box->shared_regs[reg1->idx];
143 raw_spin_lock_irqsave(&er->lock, flags);
144 if (!atomic_read(&er->ref) ||
145 (er->config1 == reg1->config && er->config2 == reg2->config)) {
146 atomic_inc(&er->ref);
147 er->config1 = reg1->config;
148 er->config2 = reg2->config;
149 ok = true;
151 raw_spin_unlock_irqrestore(&er->lock, flags);
153 if (ok) {
154 if (!uncore_box_is_fake(box))
155 reg1->alloc = 1;
156 return NULL;
159 return &uncore_constraint_empty;
162 void uncore_put_constraint(struct intel_uncore_box *box, struct perf_event *event)
164 struct intel_uncore_extra_reg *er;
165 struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
168 * Only put constraint if extra reg was actually allocated. Also
169 * takes care of event which do not use an extra shared reg.
171 * Also, if this is a fake box we shouldn't touch any event state
172 * (reg->alloc) and we don't care about leaving inconsistent box
173 * state either since it will be thrown out.
175 if (uncore_box_is_fake(box) || !reg1->alloc)
176 return;
178 er = &box->shared_regs[reg1->idx];
179 atomic_dec(&er->ref);
180 reg1->alloc = 0;
183 u64 uncore_shared_reg_config(struct intel_uncore_box *box, int idx)
185 struct intel_uncore_extra_reg *er;
186 unsigned long flags;
187 u64 config;
189 er = &box->shared_regs[idx];
191 raw_spin_lock_irqsave(&er->lock, flags);
192 config = er->config;
193 raw_spin_unlock_irqrestore(&er->lock, flags);
195 return config;
198 static void uncore_assign_hw_event(struct intel_uncore_box *box,
199 struct perf_event *event, int idx)
201 struct hw_perf_event *hwc = &event->hw;
203 hwc->idx = idx;
204 hwc->last_tag = ++box->tags[idx];
206 if (uncore_pmc_fixed(hwc->idx)) {
207 hwc->event_base = uncore_fixed_ctr(box);
208 hwc->config_base = uncore_fixed_ctl(box);
209 return;
212 hwc->config_base = uncore_event_ctl(box, hwc->idx);
213 hwc->event_base = uncore_perf_ctr(box, hwc->idx);
216 void uncore_perf_event_update(struct intel_uncore_box *box, struct perf_event *event)
218 u64 prev_count, new_count, delta;
219 int shift;
221 if (uncore_pmc_freerunning(event->hw.idx))
222 shift = 64 - uncore_freerunning_bits(box, event);
223 else if (uncore_pmc_fixed(event->hw.idx))
224 shift = 64 - uncore_fixed_ctr_bits(box);
225 else
226 shift = 64 - uncore_perf_ctr_bits(box);
228 /* the hrtimer might modify the previous event value */
229 again:
230 prev_count = local64_read(&event->hw.prev_count);
231 new_count = uncore_read_counter(box, event);
232 if (local64_xchg(&event->hw.prev_count, new_count) != prev_count)
233 goto again;
235 delta = (new_count << shift) - (prev_count << shift);
236 delta >>= shift;
238 local64_add(delta, &event->count);
242 * The overflow interrupt is unavailable for SandyBridge-EP, is broken
243 * for SandyBridge. So we use hrtimer to periodically poll the counter
244 * to avoid overflow.
246 static enum hrtimer_restart uncore_pmu_hrtimer(struct hrtimer *hrtimer)
248 struct intel_uncore_box *box;
249 struct perf_event *event;
250 unsigned long flags;
251 int bit;
253 box = container_of(hrtimer, struct intel_uncore_box, hrtimer);
254 if (!box->n_active || box->cpu != smp_processor_id())
255 return HRTIMER_NORESTART;
257 * disable local interrupt to prevent uncore_pmu_event_start/stop
258 * to interrupt the update process
260 local_irq_save(flags);
263 * handle boxes with an active event list as opposed to active
264 * counters
266 list_for_each_entry(event, &box->active_list, active_entry) {
267 uncore_perf_event_update(box, event);
270 for_each_set_bit(bit, box->active_mask, UNCORE_PMC_IDX_MAX)
271 uncore_perf_event_update(box, box->events[bit]);
273 local_irq_restore(flags);
275 hrtimer_forward_now(hrtimer, ns_to_ktime(box->hrtimer_duration));
276 return HRTIMER_RESTART;
279 void uncore_pmu_start_hrtimer(struct intel_uncore_box *box)
281 hrtimer_start(&box->hrtimer, ns_to_ktime(box->hrtimer_duration),
282 HRTIMER_MODE_REL_PINNED);
285 void uncore_pmu_cancel_hrtimer(struct intel_uncore_box *box)
287 hrtimer_cancel(&box->hrtimer);
290 static void uncore_pmu_init_hrtimer(struct intel_uncore_box *box)
292 hrtimer_init(&box->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
293 box->hrtimer.function = uncore_pmu_hrtimer;
296 static struct intel_uncore_box *uncore_alloc_box(struct intel_uncore_type *type,
297 int node)
299 int i, size, numshared = type->num_shared_regs ;
300 struct intel_uncore_box *box;
302 size = sizeof(*box) + numshared * sizeof(struct intel_uncore_extra_reg);
304 box = kzalloc_node(size, GFP_KERNEL, node);
305 if (!box)
306 return NULL;
308 for (i = 0; i < numshared; i++)
309 raw_spin_lock_init(&box->shared_regs[i].lock);
311 uncore_pmu_init_hrtimer(box);
312 box->cpu = -1;
313 box->pci_phys_id = -1;
314 box->pkgid = -1;
316 /* set default hrtimer timeout */
317 box->hrtimer_duration = UNCORE_PMU_HRTIMER_INTERVAL;
319 INIT_LIST_HEAD(&box->active_list);
321 return box;
325 * Using uncore_pmu_event_init pmu event_init callback
326 * as a detection point for uncore events.
328 static int uncore_pmu_event_init(struct perf_event *event);
330 static bool is_box_event(struct intel_uncore_box *box, struct perf_event *event)
332 return &box->pmu->pmu == event->pmu;
335 static int
336 uncore_collect_events(struct intel_uncore_box *box, struct perf_event *leader,
337 bool dogrp)
339 struct perf_event *event;
340 int n, max_count;
342 max_count = box->pmu->type->num_counters;
343 if (box->pmu->type->fixed_ctl)
344 max_count++;
346 if (box->n_events >= max_count)
347 return -EINVAL;
349 n = box->n_events;
351 if (is_box_event(box, leader)) {
352 box->event_list[n] = leader;
353 n++;
356 if (!dogrp)
357 return n;
359 for_each_sibling_event(event, leader) {
360 if (!is_box_event(box, event) ||
361 event->state <= PERF_EVENT_STATE_OFF)
362 continue;
364 if (n >= max_count)
365 return -EINVAL;
367 box->event_list[n] = event;
368 n++;
370 return n;
373 static struct event_constraint *
374 uncore_get_event_constraint(struct intel_uncore_box *box, struct perf_event *event)
376 struct intel_uncore_type *type = box->pmu->type;
377 struct event_constraint *c;
379 if (type->ops->get_constraint) {
380 c = type->ops->get_constraint(box, event);
381 if (c)
382 return c;
385 if (event->attr.config == UNCORE_FIXED_EVENT)
386 return &uncore_constraint_fixed;
388 if (type->constraints) {
389 for_each_event_constraint(c, type->constraints) {
390 if ((event->hw.config & c->cmask) == c->code)
391 return c;
395 return &type->unconstrainted;
398 static void uncore_put_event_constraint(struct intel_uncore_box *box,
399 struct perf_event *event)
401 if (box->pmu->type->ops->put_constraint)
402 box->pmu->type->ops->put_constraint(box, event);
405 static int uncore_assign_events(struct intel_uncore_box *box, int assign[], int n)
407 unsigned long used_mask[BITS_TO_LONGS(UNCORE_PMC_IDX_MAX)];
408 struct event_constraint *c;
409 int i, wmin, wmax, ret = 0;
410 struct hw_perf_event *hwc;
412 bitmap_zero(used_mask, UNCORE_PMC_IDX_MAX);
414 for (i = 0, wmin = UNCORE_PMC_IDX_MAX, wmax = 0; i < n; i++) {
415 c = uncore_get_event_constraint(box, box->event_list[i]);
416 box->event_constraint[i] = c;
417 wmin = min(wmin, c->weight);
418 wmax = max(wmax, c->weight);
421 /* fastpath, try to reuse previous register */
422 for (i = 0; i < n; i++) {
423 hwc = &box->event_list[i]->hw;
424 c = box->event_constraint[i];
426 /* never assigned */
427 if (hwc->idx == -1)
428 break;
430 /* constraint still honored */
431 if (!test_bit(hwc->idx, c->idxmsk))
432 break;
434 /* not already used */
435 if (test_bit(hwc->idx, used_mask))
436 break;
438 __set_bit(hwc->idx, used_mask);
439 if (assign)
440 assign[i] = hwc->idx;
442 /* slow path */
443 if (i != n)
444 ret = perf_assign_events(box->event_constraint, n,
445 wmin, wmax, n, assign);
447 if (!assign || ret) {
448 for (i = 0; i < n; i++)
449 uncore_put_event_constraint(box, box->event_list[i]);
451 return ret ? -EINVAL : 0;
454 void uncore_pmu_event_start(struct perf_event *event, int flags)
456 struct intel_uncore_box *box = uncore_event_to_box(event);
457 int idx = event->hw.idx;
459 if (WARN_ON_ONCE(idx == -1 || idx >= UNCORE_PMC_IDX_MAX))
460 return;
463 * Free running counter is read-only and always active.
464 * Use the current counter value as start point.
465 * There is no overflow interrupt for free running counter.
466 * Use hrtimer to periodically poll the counter to avoid overflow.
468 if (uncore_pmc_freerunning(event->hw.idx)) {
469 list_add_tail(&event->active_entry, &box->active_list);
470 local64_set(&event->hw.prev_count,
471 uncore_read_counter(box, event));
472 if (box->n_active++ == 0)
473 uncore_pmu_start_hrtimer(box);
474 return;
477 if (WARN_ON_ONCE(!(event->hw.state & PERF_HES_STOPPED)))
478 return;
480 event->hw.state = 0;
481 box->events[idx] = event;
482 box->n_active++;
483 __set_bit(idx, box->active_mask);
485 local64_set(&event->hw.prev_count, uncore_read_counter(box, event));
486 uncore_enable_event(box, event);
488 if (box->n_active == 1) {
489 uncore_enable_box(box);
490 uncore_pmu_start_hrtimer(box);
494 void uncore_pmu_event_stop(struct perf_event *event, int flags)
496 struct intel_uncore_box *box = uncore_event_to_box(event);
497 struct hw_perf_event *hwc = &event->hw;
499 /* Cannot disable free running counter which is read-only */
500 if (uncore_pmc_freerunning(hwc->idx)) {
501 list_del(&event->active_entry);
502 if (--box->n_active == 0)
503 uncore_pmu_cancel_hrtimer(box);
504 uncore_perf_event_update(box, event);
505 return;
508 if (__test_and_clear_bit(hwc->idx, box->active_mask)) {
509 uncore_disable_event(box, event);
510 box->n_active--;
511 box->events[hwc->idx] = NULL;
512 WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
513 hwc->state |= PERF_HES_STOPPED;
515 if (box->n_active == 0) {
516 uncore_disable_box(box);
517 uncore_pmu_cancel_hrtimer(box);
521 if ((flags & PERF_EF_UPDATE) && !(hwc->state & PERF_HES_UPTODATE)) {
523 * Drain the remaining delta count out of a event
524 * that we are disabling:
526 uncore_perf_event_update(box, event);
527 hwc->state |= PERF_HES_UPTODATE;
531 int uncore_pmu_event_add(struct perf_event *event, int flags)
533 struct intel_uncore_box *box = uncore_event_to_box(event);
534 struct hw_perf_event *hwc = &event->hw;
535 int assign[UNCORE_PMC_IDX_MAX];
536 int i, n, ret;
538 if (!box)
539 return -ENODEV;
542 * The free funning counter is assigned in event_init().
543 * The free running counter event and free running counter
544 * are 1:1 mapped. It doesn't need to be tracked in event_list.
546 if (uncore_pmc_freerunning(hwc->idx)) {
547 if (flags & PERF_EF_START)
548 uncore_pmu_event_start(event, 0);
549 return 0;
552 ret = n = uncore_collect_events(box, event, false);
553 if (ret < 0)
554 return ret;
556 hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
557 if (!(flags & PERF_EF_START))
558 hwc->state |= PERF_HES_ARCH;
560 ret = uncore_assign_events(box, assign, n);
561 if (ret)
562 return ret;
564 /* save events moving to new counters */
565 for (i = 0; i < box->n_events; i++) {
566 event = box->event_list[i];
567 hwc = &event->hw;
569 if (hwc->idx == assign[i] &&
570 hwc->last_tag == box->tags[assign[i]])
571 continue;
573 * Ensure we don't accidentally enable a stopped
574 * counter simply because we rescheduled.
576 if (hwc->state & PERF_HES_STOPPED)
577 hwc->state |= PERF_HES_ARCH;
579 uncore_pmu_event_stop(event, PERF_EF_UPDATE);
582 /* reprogram moved events into new counters */
583 for (i = 0; i < n; i++) {
584 event = box->event_list[i];
585 hwc = &event->hw;
587 if (hwc->idx != assign[i] ||
588 hwc->last_tag != box->tags[assign[i]])
589 uncore_assign_hw_event(box, event, assign[i]);
590 else if (i < box->n_events)
591 continue;
593 if (hwc->state & PERF_HES_ARCH)
594 continue;
596 uncore_pmu_event_start(event, 0);
598 box->n_events = n;
600 return 0;
603 void uncore_pmu_event_del(struct perf_event *event, int flags)
605 struct intel_uncore_box *box = uncore_event_to_box(event);
606 int i;
608 uncore_pmu_event_stop(event, PERF_EF_UPDATE);
611 * The event for free running counter is not tracked by event_list.
612 * It doesn't need to force event->hw.idx = -1 to reassign the counter.
613 * Because the event and the free running counter are 1:1 mapped.
615 if (uncore_pmc_freerunning(event->hw.idx))
616 return;
618 for (i = 0; i < box->n_events; i++) {
619 if (event == box->event_list[i]) {
620 uncore_put_event_constraint(box, event);
622 for (++i; i < box->n_events; i++)
623 box->event_list[i - 1] = box->event_list[i];
625 --box->n_events;
626 break;
630 event->hw.idx = -1;
631 event->hw.last_tag = ~0ULL;
634 void uncore_pmu_event_read(struct perf_event *event)
636 struct intel_uncore_box *box = uncore_event_to_box(event);
637 uncore_perf_event_update(box, event);
641 * validation ensures the group can be loaded onto the
642 * PMU if it was the only group available.
644 static int uncore_validate_group(struct intel_uncore_pmu *pmu,
645 struct perf_event *event)
647 struct perf_event *leader = event->group_leader;
648 struct intel_uncore_box *fake_box;
649 int ret = -EINVAL, n;
651 /* The free running counter is always active. */
652 if (uncore_pmc_freerunning(event->hw.idx))
653 return 0;
655 fake_box = uncore_alloc_box(pmu->type, NUMA_NO_NODE);
656 if (!fake_box)
657 return -ENOMEM;
659 fake_box->pmu = pmu;
661 * the event is not yet connected with its
662 * siblings therefore we must first collect
663 * existing siblings, then add the new event
664 * before we can simulate the scheduling
666 n = uncore_collect_events(fake_box, leader, true);
667 if (n < 0)
668 goto out;
670 fake_box->n_events = n;
671 n = uncore_collect_events(fake_box, event, false);
672 if (n < 0)
673 goto out;
675 fake_box->n_events = n;
677 ret = uncore_assign_events(fake_box, NULL, n);
678 out:
679 kfree(fake_box);
680 return ret;
683 static int uncore_pmu_event_init(struct perf_event *event)
685 struct intel_uncore_pmu *pmu;
686 struct intel_uncore_box *box;
687 struct hw_perf_event *hwc = &event->hw;
688 int ret;
690 if (event->attr.type != event->pmu->type)
691 return -ENOENT;
693 pmu = uncore_event_to_pmu(event);
694 /* no device found for this pmu */
695 if (pmu->func_id < 0)
696 return -ENOENT;
699 * Uncore PMU does measure at all privilege level all the time.
700 * So it doesn't make sense to specify any exclude bits.
702 if (event->attr.exclude_user || event->attr.exclude_kernel ||
703 event->attr.exclude_hv || event->attr.exclude_idle)
704 return -EINVAL;
706 /* Sampling not supported yet */
707 if (hwc->sample_period)
708 return -EINVAL;
711 * Place all uncore events for a particular physical package
712 * onto a single cpu
714 if (event->cpu < 0)
715 return -EINVAL;
716 box = uncore_pmu_to_box(pmu, event->cpu);
717 if (!box || box->cpu < 0)
718 return -EINVAL;
719 event->cpu = box->cpu;
720 event->pmu_private = box;
722 event->event_caps |= PERF_EV_CAP_READ_ACTIVE_PKG;
724 event->hw.idx = -1;
725 event->hw.last_tag = ~0ULL;
726 event->hw.extra_reg.idx = EXTRA_REG_NONE;
727 event->hw.branch_reg.idx = EXTRA_REG_NONE;
729 if (event->attr.config == UNCORE_FIXED_EVENT) {
730 /* no fixed counter */
731 if (!pmu->type->fixed_ctl)
732 return -EINVAL;
734 * if there is only one fixed counter, only the first pmu
735 * can access the fixed counter
737 if (pmu->type->single_fixed && pmu->pmu_idx > 0)
738 return -EINVAL;
740 /* fixed counters have event field hardcoded to zero */
741 hwc->config = 0ULL;
742 } else if (is_freerunning_event(event)) {
743 if (!check_valid_freerunning_event(box, event))
744 return -EINVAL;
745 event->hw.idx = UNCORE_PMC_IDX_FREERUNNING;
747 * The free running counter event and free running counter
748 * are always 1:1 mapped.
749 * The free running counter is always active.
750 * Assign the free running counter here.
752 event->hw.event_base = uncore_freerunning_counter(box, event);
753 } else {
754 hwc->config = event->attr.config &
755 (pmu->type->event_mask | ((u64)pmu->type->event_mask_ext << 32));
756 if (pmu->type->ops->hw_config) {
757 ret = pmu->type->ops->hw_config(box, event);
758 if (ret)
759 return ret;
763 if (event->group_leader != event)
764 ret = uncore_validate_group(pmu, event);
765 else
766 ret = 0;
768 return ret;
771 static ssize_t uncore_get_attr_cpumask(struct device *dev,
772 struct device_attribute *attr, char *buf)
774 return cpumap_print_to_pagebuf(true, buf, &uncore_cpu_mask);
777 static DEVICE_ATTR(cpumask, S_IRUGO, uncore_get_attr_cpumask, NULL);
779 static struct attribute *uncore_pmu_attrs[] = {
780 &dev_attr_cpumask.attr,
781 NULL,
784 static const struct attribute_group uncore_pmu_attr_group = {
785 .attrs = uncore_pmu_attrs,
788 static int uncore_pmu_register(struct intel_uncore_pmu *pmu)
790 int ret;
792 if (!pmu->type->pmu) {
793 pmu->pmu = (struct pmu) {
794 .attr_groups = pmu->type->attr_groups,
795 .task_ctx_nr = perf_invalid_context,
796 .event_init = uncore_pmu_event_init,
797 .add = uncore_pmu_event_add,
798 .del = uncore_pmu_event_del,
799 .start = uncore_pmu_event_start,
800 .stop = uncore_pmu_event_stop,
801 .read = uncore_pmu_event_read,
802 .module = THIS_MODULE,
804 } else {
805 pmu->pmu = *pmu->type->pmu;
806 pmu->pmu.attr_groups = pmu->type->attr_groups;
809 if (pmu->type->num_boxes == 1) {
810 if (strlen(pmu->type->name) > 0)
811 sprintf(pmu->name, "uncore_%s", pmu->type->name);
812 else
813 sprintf(pmu->name, "uncore");
814 } else {
815 sprintf(pmu->name, "uncore_%s_%d", pmu->type->name,
816 pmu->pmu_idx);
819 ret = perf_pmu_register(&pmu->pmu, pmu->name, -1);
820 if (!ret)
821 pmu->registered = true;
822 return ret;
825 static void uncore_pmu_unregister(struct intel_uncore_pmu *pmu)
827 if (!pmu->registered)
828 return;
829 perf_pmu_unregister(&pmu->pmu);
830 pmu->registered = false;
833 static void uncore_free_boxes(struct intel_uncore_pmu *pmu)
835 int pkg;
837 for (pkg = 0; pkg < max_packages; pkg++)
838 kfree(pmu->boxes[pkg]);
839 kfree(pmu->boxes);
842 static void uncore_type_exit(struct intel_uncore_type *type)
844 struct intel_uncore_pmu *pmu = type->pmus;
845 int i;
847 if (pmu) {
848 for (i = 0; i < type->num_boxes; i++, pmu++) {
849 uncore_pmu_unregister(pmu);
850 uncore_free_boxes(pmu);
852 kfree(type->pmus);
853 type->pmus = NULL;
855 kfree(type->events_group);
856 type->events_group = NULL;
859 static void uncore_types_exit(struct intel_uncore_type **types)
861 for (; *types; types++)
862 uncore_type_exit(*types);
865 static int __init uncore_type_init(struct intel_uncore_type *type, bool setid)
867 struct intel_uncore_pmu *pmus;
868 size_t size;
869 int i, j;
871 pmus = kcalloc(type->num_boxes, sizeof(*pmus), GFP_KERNEL);
872 if (!pmus)
873 return -ENOMEM;
875 size = max_packages * sizeof(struct intel_uncore_box *);
877 for (i = 0; i < type->num_boxes; i++) {
878 pmus[i].func_id = setid ? i : -1;
879 pmus[i].pmu_idx = i;
880 pmus[i].type = type;
881 pmus[i].boxes = kzalloc(size, GFP_KERNEL);
882 if (!pmus[i].boxes)
883 goto err;
886 type->pmus = pmus;
887 type->unconstrainted = (struct event_constraint)
888 __EVENT_CONSTRAINT(0, (1ULL << type->num_counters) - 1,
889 0, type->num_counters, 0, 0);
891 if (type->event_descs) {
892 struct {
893 struct attribute_group group;
894 struct attribute *attrs[];
895 } *attr_group;
896 for (i = 0; type->event_descs[i].attr.attr.name; i++);
898 attr_group = kzalloc(struct_size(attr_group, attrs, i + 1),
899 GFP_KERNEL);
900 if (!attr_group)
901 goto err;
903 attr_group->group.name = "events";
904 attr_group->group.attrs = attr_group->attrs;
906 for (j = 0; j < i; j++)
907 attr_group->attrs[j] = &type->event_descs[j].attr.attr;
909 type->events_group = &attr_group->group;
912 type->pmu_group = &uncore_pmu_attr_group;
914 return 0;
916 err:
917 for (i = 0; i < type->num_boxes; i++)
918 kfree(pmus[i].boxes);
919 kfree(pmus);
921 return -ENOMEM;
924 static int __init
925 uncore_types_init(struct intel_uncore_type **types, bool setid)
927 int ret;
929 for (; *types; types++) {
930 ret = uncore_type_init(*types, setid);
931 if (ret)
932 return ret;
934 return 0;
938 * add a pci uncore device
940 static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
942 struct intel_uncore_type *type;
943 struct intel_uncore_pmu *pmu = NULL;
944 struct intel_uncore_box *box;
945 int phys_id, pkg, ret;
947 phys_id = uncore_pcibus_to_physid(pdev->bus);
948 if (phys_id < 0)
949 return -ENODEV;
951 pkg = topology_phys_to_logical_pkg(phys_id);
952 if (pkg < 0)
953 return -EINVAL;
955 if (UNCORE_PCI_DEV_TYPE(id->driver_data) == UNCORE_EXTRA_PCI_DEV) {
956 int idx = UNCORE_PCI_DEV_IDX(id->driver_data);
958 uncore_extra_pci_dev[pkg].dev[idx] = pdev;
959 pci_set_drvdata(pdev, NULL);
960 return 0;
963 type = uncore_pci_uncores[UNCORE_PCI_DEV_TYPE(id->driver_data)];
966 * Some platforms, e.g. Knights Landing, use a common PCI device ID
967 * for multiple instances of an uncore PMU device type. We should check
968 * PCI slot and func to indicate the uncore box.
970 if (id->driver_data & ~0xffff) {
971 struct pci_driver *pci_drv = pdev->driver;
972 const struct pci_device_id *ids = pci_drv->id_table;
973 unsigned int devfn;
975 while (ids && ids->vendor) {
976 if ((ids->vendor == pdev->vendor) &&
977 (ids->device == pdev->device)) {
978 devfn = PCI_DEVFN(UNCORE_PCI_DEV_DEV(ids->driver_data),
979 UNCORE_PCI_DEV_FUNC(ids->driver_data));
980 if (devfn == pdev->devfn) {
981 pmu = &type->pmus[UNCORE_PCI_DEV_IDX(ids->driver_data)];
982 break;
985 ids++;
987 if (pmu == NULL)
988 return -ENODEV;
989 } else {
991 * for performance monitoring unit with multiple boxes,
992 * each box has a different function id.
994 pmu = &type->pmus[UNCORE_PCI_DEV_IDX(id->driver_data)];
997 if (WARN_ON_ONCE(pmu->boxes[pkg] != NULL))
998 return -EINVAL;
1000 box = uncore_alloc_box(type, NUMA_NO_NODE);
1001 if (!box)
1002 return -ENOMEM;
1004 if (pmu->func_id < 0)
1005 pmu->func_id = pdev->devfn;
1006 else
1007 WARN_ON_ONCE(pmu->func_id != pdev->devfn);
1009 atomic_inc(&box->refcnt);
1010 box->pci_phys_id = phys_id;
1011 box->pkgid = pkg;
1012 box->pci_dev = pdev;
1013 box->pmu = pmu;
1014 uncore_box_init(box);
1015 pci_set_drvdata(pdev, box);
1017 pmu->boxes[pkg] = box;
1018 if (atomic_inc_return(&pmu->activeboxes) > 1)
1019 return 0;
1021 /* First active box registers the pmu */
1022 ret = uncore_pmu_register(pmu);
1023 if (ret) {
1024 pci_set_drvdata(pdev, NULL);
1025 pmu->boxes[pkg] = NULL;
1026 uncore_box_exit(box);
1027 kfree(box);
1029 return ret;
1032 static void uncore_pci_remove(struct pci_dev *pdev)
1034 struct intel_uncore_box *box;
1035 struct intel_uncore_pmu *pmu;
1036 int i, phys_id, pkg;
1038 phys_id = uncore_pcibus_to_physid(pdev->bus);
1040 box = pci_get_drvdata(pdev);
1041 if (!box) {
1042 pkg = topology_phys_to_logical_pkg(phys_id);
1043 for (i = 0; i < UNCORE_EXTRA_PCI_DEV_MAX; i++) {
1044 if (uncore_extra_pci_dev[pkg].dev[i] == pdev) {
1045 uncore_extra_pci_dev[pkg].dev[i] = NULL;
1046 break;
1049 WARN_ON_ONCE(i >= UNCORE_EXTRA_PCI_DEV_MAX);
1050 return;
1053 pmu = box->pmu;
1054 if (WARN_ON_ONCE(phys_id != box->pci_phys_id))
1055 return;
1057 pci_set_drvdata(pdev, NULL);
1058 pmu->boxes[box->pkgid] = NULL;
1059 if (atomic_dec_return(&pmu->activeboxes) == 0)
1060 uncore_pmu_unregister(pmu);
1061 uncore_box_exit(box);
1062 kfree(box);
1065 static int __init uncore_pci_init(void)
1067 size_t size;
1068 int ret;
1070 size = max_packages * sizeof(struct pci_extra_dev);
1071 uncore_extra_pci_dev = kzalloc(size, GFP_KERNEL);
1072 if (!uncore_extra_pci_dev) {
1073 ret = -ENOMEM;
1074 goto err;
1077 ret = uncore_types_init(uncore_pci_uncores, false);
1078 if (ret)
1079 goto errtype;
1081 uncore_pci_driver->probe = uncore_pci_probe;
1082 uncore_pci_driver->remove = uncore_pci_remove;
1084 ret = pci_register_driver(uncore_pci_driver);
1085 if (ret)
1086 goto errtype;
1088 pcidrv_registered = true;
1089 return 0;
1091 errtype:
1092 uncore_types_exit(uncore_pci_uncores);
1093 kfree(uncore_extra_pci_dev);
1094 uncore_extra_pci_dev = NULL;
1095 uncore_free_pcibus_map();
1096 err:
1097 uncore_pci_uncores = empty_uncore;
1098 return ret;
1101 static void uncore_pci_exit(void)
1103 if (pcidrv_registered) {
1104 pcidrv_registered = false;
1105 pci_unregister_driver(uncore_pci_driver);
1106 uncore_types_exit(uncore_pci_uncores);
1107 kfree(uncore_extra_pci_dev);
1108 uncore_free_pcibus_map();
1112 static void uncore_change_type_ctx(struct intel_uncore_type *type, int old_cpu,
1113 int new_cpu)
1115 struct intel_uncore_pmu *pmu = type->pmus;
1116 struct intel_uncore_box *box;
1117 int i, pkg;
1119 pkg = topology_logical_package_id(old_cpu < 0 ? new_cpu : old_cpu);
1120 for (i = 0; i < type->num_boxes; i++, pmu++) {
1121 box = pmu->boxes[pkg];
1122 if (!box)
1123 continue;
1125 if (old_cpu < 0) {
1126 WARN_ON_ONCE(box->cpu != -1);
1127 box->cpu = new_cpu;
1128 continue;
1131 WARN_ON_ONCE(box->cpu != old_cpu);
1132 box->cpu = -1;
1133 if (new_cpu < 0)
1134 continue;
1136 uncore_pmu_cancel_hrtimer(box);
1137 perf_pmu_migrate_context(&pmu->pmu, old_cpu, new_cpu);
1138 box->cpu = new_cpu;
1142 static void uncore_change_context(struct intel_uncore_type **uncores,
1143 int old_cpu, int new_cpu)
1145 for (; *uncores; uncores++)
1146 uncore_change_type_ctx(*uncores, old_cpu, new_cpu);
1149 static int uncore_event_cpu_offline(unsigned int cpu)
1151 struct intel_uncore_type *type, **types = uncore_msr_uncores;
1152 struct intel_uncore_pmu *pmu;
1153 struct intel_uncore_box *box;
1154 int i, pkg, target;
1156 /* Check if exiting cpu is used for collecting uncore events */
1157 if (!cpumask_test_and_clear_cpu(cpu, &uncore_cpu_mask))
1158 goto unref;
1159 /* Find a new cpu to collect uncore events */
1160 target = cpumask_any_but(topology_core_cpumask(cpu), cpu);
1162 /* Migrate uncore events to the new target */
1163 if (target < nr_cpu_ids)
1164 cpumask_set_cpu(target, &uncore_cpu_mask);
1165 else
1166 target = -1;
1168 uncore_change_context(uncore_msr_uncores, cpu, target);
1169 uncore_change_context(uncore_pci_uncores, cpu, target);
1171 unref:
1172 /* Clear the references */
1173 pkg = topology_logical_package_id(cpu);
1174 for (; *types; types++) {
1175 type = *types;
1176 pmu = type->pmus;
1177 for (i = 0; i < type->num_boxes; i++, pmu++) {
1178 box = pmu->boxes[pkg];
1179 if (box && atomic_dec_return(&box->refcnt) == 0)
1180 uncore_box_exit(box);
1183 return 0;
1186 static int allocate_boxes(struct intel_uncore_type **types,
1187 unsigned int pkg, unsigned int cpu)
1189 struct intel_uncore_box *box, *tmp;
1190 struct intel_uncore_type *type;
1191 struct intel_uncore_pmu *pmu;
1192 LIST_HEAD(allocated);
1193 int i;
1195 /* Try to allocate all required boxes */
1196 for (; *types; types++) {
1197 type = *types;
1198 pmu = type->pmus;
1199 for (i = 0; i < type->num_boxes; i++, pmu++) {
1200 if (pmu->boxes[pkg])
1201 continue;
1202 box = uncore_alloc_box(type, cpu_to_node(cpu));
1203 if (!box)
1204 goto cleanup;
1205 box->pmu = pmu;
1206 box->pkgid = pkg;
1207 list_add(&box->active_list, &allocated);
1210 /* Install them in the pmus */
1211 list_for_each_entry_safe(box, tmp, &allocated, active_list) {
1212 list_del_init(&box->active_list);
1213 box->pmu->boxes[pkg] = box;
1215 return 0;
1217 cleanup:
1218 list_for_each_entry_safe(box, tmp, &allocated, active_list) {
1219 list_del_init(&box->active_list);
1220 kfree(box);
1222 return -ENOMEM;
1225 static int uncore_event_cpu_online(unsigned int cpu)
1227 struct intel_uncore_type *type, **types = uncore_msr_uncores;
1228 struct intel_uncore_pmu *pmu;
1229 struct intel_uncore_box *box;
1230 int i, ret, pkg, target;
1232 pkg = topology_logical_package_id(cpu);
1233 ret = allocate_boxes(types, pkg, cpu);
1234 if (ret)
1235 return ret;
1237 for (; *types; types++) {
1238 type = *types;
1239 pmu = type->pmus;
1240 for (i = 0; i < type->num_boxes; i++, pmu++) {
1241 box = pmu->boxes[pkg];
1242 if (box && atomic_inc_return(&box->refcnt) == 1)
1243 uncore_box_init(box);
1248 * Check if there is an online cpu in the package
1249 * which collects uncore events already.
1251 target = cpumask_any_and(&uncore_cpu_mask, topology_core_cpumask(cpu));
1252 if (target < nr_cpu_ids)
1253 return 0;
1255 cpumask_set_cpu(cpu, &uncore_cpu_mask);
1257 uncore_change_context(uncore_msr_uncores, -1, cpu);
1258 uncore_change_context(uncore_pci_uncores, -1, cpu);
1259 return 0;
1262 static int __init type_pmu_register(struct intel_uncore_type *type)
1264 int i, ret;
1266 for (i = 0; i < type->num_boxes; i++) {
1267 ret = uncore_pmu_register(&type->pmus[i]);
1268 if (ret)
1269 return ret;
1271 return 0;
1274 static int __init uncore_msr_pmus_register(void)
1276 struct intel_uncore_type **types = uncore_msr_uncores;
1277 int ret;
1279 for (; *types; types++) {
1280 ret = type_pmu_register(*types);
1281 if (ret)
1282 return ret;
1284 return 0;
1287 static int __init uncore_cpu_init(void)
1289 int ret;
1291 ret = uncore_types_init(uncore_msr_uncores, true);
1292 if (ret)
1293 goto err;
1295 ret = uncore_msr_pmus_register();
1296 if (ret)
1297 goto err;
1298 return 0;
1299 err:
1300 uncore_types_exit(uncore_msr_uncores);
1301 uncore_msr_uncores = empty_uncore;
1302 return ret;
1305 #define X86_UNCORE_MODEL_MATCH(model, init) \
1306 { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&init }
1308 struct intel_uncore_init_fun {
1309 void (*cpu_init)(void);
1310 int (*pci_init)(void);
1313 static const struct intel_uncore_init_fun nhm_uncore_init __initconst = {
1314 .cpu_init = nhm_uncore_cpu_init,
1317 static const struct intel_uncore_init_fun snb_uncore_init __initconst = {
1318 .cpu_init = snb_uncore_cpu_init,
1319 .pci_init = snb_uncore_pci_init,
1322 static const struct intel_uncore_init_fun ivb_uncore_init __initconst = {
1323 .cpu_init = snb_uncore_cpu_init,
1324 .pci_init = ivb_uncore_pci_init,
1327 static const struct intel_uncore_init_fun hsw_uncore_init __initconst = {
1328 .cpu_init = snb_uncore_cpu_init,
1329 .pci_init = hsw_uncore_pci_init,
1332 static const struct intel_uncore_init_fun bdw_uncore_init __initconst = {
1333 .cpu_init = snb_uncore_cpu_init,
1334 .pci_init = bdw_uncore_pci_init,
1337 static const struct intel_uncore_init_fun snbep_uncore_init __initconst = {
1338 .cpu_init = snbep_uncore_cpu_init,
1339 .pci_init = snbep_uncore_pci_init,
1342 static const struct intel_uncore_init_fun nhmex_uncore_init __initconst = {
1343 .cpu_init = nhmex_uncore_cpu_init,
1346 static const struct intel_uncore_init_fun ivbep_uncore_init __initconst = {
1347 .cpu_init = ivbep_uncore_cpu_init,
1348 .pci_init = ivbep_uncore_pci_init,
1351 static const struct intel_uncore_init_fun hswep_uncore_init __initconst = {
1352 .cpu_init = hswep_uncore_cpu_init,
1353 .pci_init = hswep_uncore_pci_init,
1356 static const struct intel_uncore_init_fun bdx_uncore_init __initconst = {
1357 .cpu_init = bdx_uncore_cpu_init,
1358 .pci_init = bdx_uncore_pci_init,
1361 static const struct intel_uncore_init_fun knl_uncore_init __initconst = {
1362 .cpu_init = knl_uncore_cpu_init,
1363 .pci_init = knl_uncore_pci_init,
1366 static const struct intel_uncore_init_fun skl_uncore_init __initconst = {
1367 .cpu_init = skl_uncore_cpu_init,
1368 .pci_init = skl_uncore_pci_init,
1371 static const struct intel_uncore_init_fun skx_uncore_init __initconst = {
1372 .cpu_init = skx_uncore_cpu_init,
1373 .pci_init = skx_uncore_pci_init,
1376 static const struct x86_cpu_id intel_uncore_match[] __initconst = {
1377 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_NEHALEM_EP, nhm_uncore_init),
1378 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_NEHALEM, nhm_uncore_init),
1379 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_WESTMERE, nhm_uncore_init),
1380 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_WESTMERE_EP, nhm_uncore_init),
1381 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SANDYBRIDGE, snb_uncore_init),
1382 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_IVYBRIDGE, ivb_uncore_init),
1383 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_CORE, hsw_uncore_init),
1384 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_ULT, hsw_uncore_init),
1385 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_GT3E, hsw_uncore_init),
1386 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_CORE, bdw_uncore_init),
1387 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_GT3E, bdw_uncore_init),
1388 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SANDYBRIDGE_X, snbep_uncore_init),
1389 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_NEHALEM_EX, nhmex_uncore_init),
1390 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_WESTMERE_EX, nhmex_uncore_init),
1391 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_IVYBRIDGE_X, ivbep_uncore_init),
1392 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_X, hswep_uncore_init),
1393 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_X, bdx_uncore_init),
1394 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_XEON_D, bdx_uncore_init),
1395 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_XEON_PHI_KNL, knl_uncore_init),
1396 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_XEON_PHI_KNM, knl_uncore_init),
1397 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SKYLAKE_DESKTOP,skl_uncore_init),
1398 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SKYLAKE_MOBILE, skl_uncore_init),
1399 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SKYLAKE_X, skx_uncore_init),
1400 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_KABYLAKE_MOBILE, skl_uncore_init),
1401 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_KABYLAKE_DESKTOP, skl_uncore_init),
1405 MODULE_DEVICE_TABLE(x86cpu, intel_uncore_match);
1407 static int __init intel_uncore_init(void)
1409 const struct x86_cpu_id *id;
1410 struct intel_uncore_init_fun *uncore_init;
1411 int pret = 0, cret = 0, ret;
1413 id = x86_match_cpu(intel_uncore_match);
1414 if (!id)
1415 return -ENODEV;
1417 if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
1418 return -ENODEV;
1420 max_packages = topology_max_packages();
1422 uncore_init = (struct intel_uncore_init_fun *)id->driver_data;
1423 if (uncore_init->pci_init) {
1424 pret = uncore_init->pci_init();
1425 if (!pret)
1426 pret = uncore_pci_init();
1429 if (uncore_init->cpu_init) {
1430 uncore_init->cpu_init();
1431 cret = uncore_cpu_init();
1434 if (cret && pret)
1435 return -ENODEV;
1437 /* Install hotplug callbacks to setup the targets for each package */
1438 ret = cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE,
1439 "perf/x86/intel/uncore:online",
1440 uncore_event_cpu_online,
1441 uncore_event_cpu_offline);
1442 if (ret)
1443 goto err;
1444 return 0;
1446 err:
1447 uncore_types_exit(uncore_msr_uncores);
1448 uncore_pci_exit();
1449 return ret;
1451 module_init(intel_uncore_init);
1453 static void __exit intel_uncore_exit(void)
1455 cpuhp_remove_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE);
1456 uncore_types_exit(uncore_msr_uncores);
1457 uncore_pci_exit();
1459 module_exit(intel_uncore_exit);