1 #include <linux/module.h>
3 #include <asm/cpu_device_id.h>
4 #include <asm/intel-family.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
;
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
];
42 raw_spin_unlock(&pci2phy_map_lock
);
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
) {
57 struct pci2phy_map
*__find_pci2phy_map(int segment
)
59 struct pci2phy_map
*map
, *alloc
= NULL
;
62 lockdep_assert_held(&pci2phy_map_lock
);
65 list_for_each_entry(map
, &pci2phy_map_head
, list
) {
66 if (map
->segment
== segment
)
71 raw_spin_unlock(&pci2phy_map_lock
);
72 alloc
= kmalloc(sizeof(struct pci2phy_map
), GFP_KERNEL
);
73 raw_spin_lock(&pci2phy_map_lock
);
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
);
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 return pmu
->boxes
[topology_logical_package_id(cpu
)];
106 u64
uncore_msr_read_counter(struct intel_uncore_box
*box
, struct perf_event
*event
)
110 rdmsrl(event
->hw
.event_base
, count
);
116 * generic get constraint function for shared match/mask registers.
118 struct event_constraint
*
119 uncore_get_constraint(struct intel_uncore_box
*box
, struct perf_event
*event
)
121 struct intel_uncore_extra_reg
*er
;
122 struct hw_perf_event_extra
*reg1
= &event
->hw
.extra_reg
;
123 struct hw_perf_event_extra
*reg2
= &event
->hw
.branch_reg
;
128 * reg->alloc can be set due to existing state, so for fake box we
129 * need to ignore this, otherwise we might fail to allocate proper
130 * fake state for this extra reg constraint.
132 if (reg1
->idx
== EXTRA_REG_NONE
||
133 (!uncore_box_is_fake(box
) && reg1
->alloc
))
136 er
= &box
->shared_regs
[reg1
->idx
];
137 raw_spin_lock_irqsave(&er
->lock
, flags
);
138 if (!atomic_read(&er
->ref
) ||
139 (er
->config1
== reg1
->config
&& er
->config2
== reg2
->config
)) {
140 atomic_inc(&er
->ref
);
141 er
->config1
= reg1
->config
;
142 er
->config2
= reg2
->config
;
145 raw_spin_unlock_irqrestore(&er
->lock
, flags
);
148 if (!uncore_box_is_fake(box
))
153 return &uncore_constraint_empty
;
156 void uncore_put_constraint(struct intel_uncore_box
*box
, struct perf_event
*event
)
158 struct intel_uncore_extra_reg
*er
;
159 struct hw_perf_event_extra
*reg1
= &event
->hw
.extra_reg
;
162 * Only put constraint if extra reg was actually allocated. Also
163 * takes care of event which do not use an extra shared reg.
165 * Also, if this is a fake box we shouldn't touch any event state
166 * (reg->alloc) and we don't care about leaving inconsistent box
167 * state either since it will be thrown out.
169 if (uncore_box_is_fake(box
) || !reg1
->alloc
)
172 er
= &box
->shared_regs
[reg1
->idx
];
173 atomic_dec(&er
->ref
);
177 u64
uncore_shared_reg_config(struct intel_uncore_box
*box
, int idx
)
179 struct intel_uncore_extra_reg
*er
;
183 er
= &box
->shared_regs
[idx
];
185 raw_spin_lock_irqsave(&er
->lock
, flags
);
187 raw_spin_unlock_irqrestore(&er
->lock
, flags
);
192 static void uncore_assign_hw_event(struct intel_uncore_box
*box
,
193 struct perf_event
*event
, int idx
)
195 struct hw_perf_event
*hwc
= &event
->hw
;
198 hwc
->last_tag
= ++box
->tags
[idx
];
200 if (hwc
->idx
== UNCORE_PMC_IDX_FIXED
) {
201 hwc
->event_base
= uncore_fixed_ctr(box
);
202 hwc
->config_base
= uncore_fixed_ctl(box
);
206 hwc
->config_base
= uncore_event_ctl(box
, hwc
->idx
);
207 hwc
->event_base
= uncore_perf_ctr(box
, hwc
->idx
);
210 void uncore_perf_event_update(struct intel_uncore_box
*box
, struct perf_event
*event
)
212 u64 prev_count
, new_count
, delta
;
215 if (event
->hw
.idx
>= UNCORE_PMC_IDX_FIXED
)
216 shift
= 64 - uncore_fixed_ctr_bits(box
);
218 shift
= 64 - uncore_perf_ctr_bits(box
);
220 /* the hrtimer might modify the previous event value */
222 prev_count
= local64_read(&event
->hw
.prev_count
);
223 new_count
= uncore_read_counter(box
, event
);
224 if (local64_xchg(&event
->hw
.prev_count
, new_count
) != prev_count
)
227 delta
= (new_count
<< shift
) - (prev_count
<< shift
);
230 local64_add(delta
, &event
->count
);
234 * The overflow interrupt is unavailable for SandyBridge-EP, is broken
235 * for SandyBridge. So we use hrtimer to periodically poll the counter
238 static enum hrtimer_restart
uncore_pmu_hrtimer(struct hrtimer
*hrtimer
)
240 struct intel_uncore_box
*box
;
241 struct perf_event
*event
;
245 box
= container_of(hrtimer
, struct intel_uncore_box
, hrtimer
);
246 if (!box
->n_active
|| box
->cpu
!= smp_processor_id())
247 return HRTIMER_NORESTART
;
249 * disable local interrupt to prevent uncore_pmu_event_start/stop
250 * to interrupt the update process
252 local_irq_save(flags
);
255 * handle boxes with an active event list as opposed to active
258 list_for_each_entry(event
, &box
->active_list
, active_entry
) {
259 uncore_perf_event_update(box
, event
);
262 for_each_set_bit(bit
, box
->active_mask
, UNCORE_PMC_IDX_MAX
)
263 uncore_perf_event_update(box
, box
->events
[bit
]);
265 local_irq_restore(flags
);
267 hrtimer_forward_now(hrtimer
, ns_to_ktime(box
->hrtimer_duration
));
268 return HRTIMER_RESTART
;
271 void uncore_pmu_start_hrtimer(struct intel_uncore_box
*box
)
273 hrtimer_start(&box
->hrtimer
, ns_to_ktime(box
->hrtimer_duration
),
274 HRTIMER_MODE_REL_PINNED
);
277 void uncore_pmu_cancel_hrtimer(struct intel_uncore_box
*box
)
279 hrtimer_cancel(&box
->hrtimer
);
282 static void uncore_pmu_init_hrtimer(struct intel_uncore_box
*box
)
284 hrtimer_init(&box
->hrtimer
, CLOCK_MONOTONIC
, HRTIMER_MODE_REL
);
285 box
->hrtimer
.function
= uncore_pmu_hrtimer
;
288 static struct intel_uncore_box
*uncore_alloc_box(struct intel_uncore_type
*type
,
291 int i
, size
, numshared
= type
->num_shared_regs
;
292 struct intel_uncore_box
*box
;
294 size
= sizeof(*box
) + numshared
* sizeof(struct intel_uncore_extra_reg
);
296 box
= kzalloc_node(size
, GFP_KERNEL
, node
);
300 for (i
= 0; i
< numshared
; i
++)
301 raw_spin_lock_init(&box
->shared_regs
[i
].lock
);
303 uncore_pmu_init_hrtimer(box
);
305 box
->pci_phys_id
= -1;
308 /* set default hrtimer timeout */
309 box
->hrtimer_duration
= UNCORE_PMU_HRTIMER_INTERVAL
;
311 INIT_LIST_HEAD(&box
->active_list
);
317 * Using uncore_pmu_event_init pmu event_init callback
318 * as a detection point for uncore events.
320 static int uncore_pmu_event_init(struct perf_event
*event
);
322 static bool is_uncore_event(struct perf_event
*event
)
324 return event
->pmu
->event_init
== uncore_pmu_event_init
;
328 uncore_collect_events(struct intel_uncore_box
*box
, struct perf_event
*leader
,
331 struct perf_event
*event
;
334 max_count
= box
->pmu
->type
->num_counters
;
335 if (box
->pmu
->type
->fixed_ctl
)
338 if (box
->n_events
>= max_count
)
343 if (is_uncore_event(leader
)) {
344 box
->event_list
[n
] = leader
;
351 list_for_each_entry(event
, &leader
->sibling_list
, group_entry
) {
352 if (!is_uncore_event(event
) ||
353 event
->state
<= PERF_EVENT_STATE_OFF
)
359 box
->event_list
[n
] = event
;
365 static struct event_constraint
*
366 uncore_get_event_constraint(struct intel_uncore_box
*box
, struct perf_event
*event
)
368 struct intel_uncore_type
*type
= box
->pmu
->type
;
369 struct event_constraint
*c
;
371 if (type
->ops
->get_constraint
) {
372 c
= type
->ops
->get_constraint(box
, event
);
377 if (event
->attr
.config
== UNCORE_FIXED_EVENT
)
378 return &uncore_constraint_fixed
;
380 if (type
->constraints
) {
381 for_each_event_constraint(c
, type
->constraints
) {
382 if ((event
->hw
.config
& c
->cmask
) == c
->code
)
387 return &type
->unconstrainted
;
390 static void uncore_put_event_constraint(struct intel_uncore_box
*box
,
391 struct perf_event
*event
)
393 if (box
->pmu
->type
->ops
->put_constraint
)
394 box
->pmu
->type
->ops
->put_constraint(box
, event
);
397 static int uncore_assign_events(struct intel_uncore_box
*box
, int assign
[], int n
)
399 unsigned long used_mask
[BITS_TO_LONGS(UNCORE_PMC_IDX_MAX
)];
400 struct event_constraint
*c
;
401 int i
, wmin
, wmax
, ret
= 0;
402 struct hw_perf_event
*hwc
;
404 bitmap_zero(used_mask
, UNCORE_PMC_IDX_MAX
);
406 for (i
= 0, wmin
= UNCORE_PMC_IDX_MAX
, wmax
= 0; i
< n
; i
++) {
407 c
= uncore_get_event_constraint(box
, box
->event_list
[i
]);
408 box
->event_constraint
[i
] = c
;
409 wmin
= min(wmin
, c
->weight
);
410 wmax
= max(wmax
, c
->weight
);
413 /* fastpath, try to reuse previous register */
414 for (i
= 0; i
< n
; i
++) {
415 hwc
= &box
->event_list
[i
]->hw
;
416 c
= box
->event_constraint
[i
];
422 /* constraint still honored */
423 if (!test_bit(hwc
->idx
, c
->idxmsk
))
426 /* not already used */
427 if (test_bit(hwc
->idx
, used_mask
))
430 __set_bit(hwc
->idx
, used_mask
);
432 assign
[i
] = hwc
->idx
;
436 ret
= perf_assign_events(box
->event_constraint
, n
,
437 wmin
, wmax
, n
, assign
);
439 if (!assign
|| ret
) {
440 for (i
= 0; i
< n
; i
++)
441 uncore_put_event_constraint(box
, box
->event_list
[i
]);
443 return ret
? -EINVAL
: 0;
446 static void uncore_pmu_event_start(struct perf_event
*event
, int flags
)
448 struct intel_uncore_box
*box
= uncore_event_to_box(event
);
449 int idx
= event
->hw
.idx
;
451 if (WARN_ON_ONCE(!(event
->hw
.state
& PERF_HES_STOPPED
)))
454 if (WARN_ON_ONCE(idx
== -1 || idx
>= UNCORE_PMC_IDX_MAX
))
458 box
->events
[idx
] = event
;
460 __set_bit(idx
, box
->active_mask
);
462 local64_set(&event
->hw
.prev_count
, uncore_read_counter(box
, event
));
463 uncore_enable_event(box
, event
);
465 if (box
->n_active
== 1) {
466 uncore_enable_box(box
);
467 uncore_pmu_start_hrtimer(box
);
471 static void uncore_pmu_event_stop(struct perf_event
*event
, int flags
)
473 struct intel_uncore_box
*box
= uncore_event_to_box(event
);
474 struct hw_perf_event
*hwc
= &event
->hw
;
476 if (__test_and_clear_bit(hwc
->idx
, box
->active_mask
)) {
477 uncore_disable_event(box
, event
);
479 box
->events
[hwc
->idx
] = NULL
;
480 WARN_ON_ONCE(hwc
->state
& PERF_HES_STOPPED
);
481 hwc
->state
|= PERF_HES_STOPPED
;
483 if (box
->n_active
== 0) {
484 uncore_disable_box(box
);
485 uncore_pmu_cancel_hrtimer(box
);
489 if ((flags
& PERF_EF_UPDATE
) && !(hwc
->state
& PERF_HES_UPTODATE
)) {
491 * Drain the remaining delta count out of a event
492 * that we are disabling:
494 uncore_perf_event_update(box
, event
);
495 hwc
->state
|= PERF_HES_UPTODATE
;
499 static int uncore_pmu_event_add(struct perf_event
*event
, int flags
)
501 struct intel_uncore_box
*box
= uncore_event_to_box(event
);
502 struct hw_perf_event
*hwc
= &event
->hw
;
503 int assign
[UNCORE_PMC_IDX_MAX
];
509 ret
= n
= uncore_collect_events(box
, event
, false);
513 hwc
->state
= PERF_HES_UPTODATE
| PERF_HES_STOPPED
;
514 if (!(flags
& PERF_EF_START
))
515 hwc
->state
|= PERF_HES_ARCH
;
517 ret
= uncore_assign_events(box
, assign
, n
);
521 /* save events moving to new counters */
522 for (i
= 0; i
< box
->n_events
; i
++) {
523 event
= box
->event_list
[i
];
526 if (hwc
->idx
== assign
[i
] &&
527 hwc
->last_tag
== box
->tags
[assign
[i
]])
530 * Ensure we don't accidentally enable a stopped
531 * counter simply because we rescheduled.
533 if (hwc
->state
& PERF_HES_STOPPED
)
534 hwc
->state
|= PERF_HES_ARCH
;
536 uncore_pmu_event_stop(event
, PERF_EF_UPDATE
);
539 /* reprogram moved events into new counters */
540 for (i
= 0; i
< n
; i
++) {
541 event
= box
->event_list
[i
];
544 if (hwc
->idx
!= assign
[i
] ||
545 hwc
->last_tag
!= box
->tags
[assign
[i
]])
546 uncore_assign_hw_event(box
, event
, assign
[i
]);
547 else if (i
< box
->n_events
)
550 if (hwc
->state
& PERF_HES_ARCH
)
553 uncore_pmu_event_start(event
, 0);
560 static void uncore_pmu_event_del(struct perf_event
*event
, int flags
)
562 struct intel_uncore_box
*box
= uncore_event_to_box(event
);
565 uncore_pmu_event_stop(event
, PERF_EF_UPDATE
);
567 for (i
= 0; i
< box
->n_events
; i
++) {
568 if (event
== box
->event_list
[i
]) {
569 uncore_put_event_constraint(box
, event
);
571 for (++i
; i
< box
->n_events
; i
++)
572 box
->event_list
[i
- 1] = box
->event_list
[i
];
580 event
->hw
.last_tag
= ~0ULL;
583 void uncore_pmu_event_read(struct perf_event
*event
)
585 struct intel_uncore_box
*box
= uncore_event_to_box(event
);
586 uncore_perf_event_update(box
, event
);
590 * validation ensures the group can be loaded onto the
591 * PMU if it was the only group available.
593 static int uncore_validate_group(struct intel_uncore_pmu
*pmu
,
594 struct perf_event
*event
)
596 struct perf_event
*leader
= event
->group_leader
;
597 struct intel_uncore_box
*fake_box
;
598 int ret
= -EINVAL
, n
;
600 fake_box
= uncore_alloc_box(pmu
->type
, NUMA_NO_NODE
);
606 * the event is not yet connected with its
607 * siblings therefore we must first collect
608 * existing siblings, then add the new event
609 * before we can simulate the scheduling
611 n
= uncore_collect_events(fake_box
, leader
, true);
615 fake_box
->n_events
= n
;
616 n
= uncore_collect_events(fake_box
, event
, false);
620 fake_box
->n_events
= n
;
622 ret
= uncore_assign_events(fake_box
, NULL
, n
);
628 static int uncore_pmu_event_init(struct perf_event
*event
)
630 struct intel_uncore_pmu
*pmu
;
631 struct intel_uncore_box
*box
;
632 struct hw_perf_event
*hwc
= &event
->hw
;
635 if (event
->attr
.type
!= event
->pmu
->type
)
638 pmu
= uncore_event_to_pmu(event
);
639 /* no device found for this pmu */
640 if (pmu
->func_id
< 0)
644 * Uncore PMU does measure at all privilege level all the time.
645 * So it doesn't make sense to specify any exclude bits.
647 if (event
->attr
.exclude_user
|| event
->attr
.exclude_kernel
||
648 event
->attr
.exclude_hv
|| event
->attr
.exclude_idle
)
651 /* Sampling not supported yet */
652 if (hwc
->sample_period
)
656 * Place all uncore events for a particular physical package
661 box
= uncore_pmu_to_box(pmu
, event
->cpu
);
662 if (!box
|| box
->cpu
< 0)
664 event
->cpu
= box
->cpu
;
665 event
->pmu_private
= box
;
668 event
->hw
.last_tag
= ~0ULL;
669 event
->hw
.extra_reg
.idx
= EXTRA_REG_NONE
;
670 event
->hw
.branch_reg
.idx
= EXTRA_REG_NONE
;
672 if (event
->attr
.config
== UNCORE_FIXED_EVENT
) {
673 /* no fixed counter */
674 if (!pmu
->type
->fixed_ctl
)
677 * if there is only one fixed counter, only the first pmu
678 * can access the fixed counter
680 if (pmu
->type
->single_fixed
&& pmu
->pmu_idx
> 0)
683 /* fixed counters have event field hardcoded to zero */
686 hwc
->config
= event
->attr
.config
& pmu
->type
->event_mask
;
687 if (pmu
->type
->ops
->hw_config
) {
688 ret
= pmu
->type
->ops
->hw_config(box
, event
);
694 if (event
->group_leader
!= event
)
695 ret
= uncore_validate_group(pmu
, event
);
702 static ssize_t
uncore_get_attr_cpumask(struct device
*dev
,
703 struct device_attribute
*attr
, char *buf
)
705 return cpumap_print_to_pagebuf(true, buf
, &uncore_cpu_mask
);
708 static DEVICE_ATTR(cpumask
, S_IRUGO
, uncore_get_attr_cpumask
, NULL
);
710 static struct attribute
*uncore_pmu_attrs
[] = {
711 &dev_attr_cpumask
.attr
,
715 static struct attribute_group uncore_pmu_attr_group
= {
716 .attrs
= uncore_pmu_attrs
,
719 static int uncore_pmu_register(struct intel_uncore_pmu
*pmu
)
723 if (!pmu
->type
->pmu
) {
724 pmu
->pmu
= (struct pmu
) {
725 .attr_groups
= pmu
->type
->attr_groups
,
726 .task_ctx_nr
= perf_invalid_context
,
727 .event_init
= uncore_pmu_event_init
,
728 .add
= uncore_pmu_event_add
,
729 .del
= uncore_pmu_event_del
,
730 .start
= uncore_pmu_event_start
,
731 .stop
= uncore_pmu_event_stop
,
732 .read
= uncore_pmu_event_read
,
735 pmu
->pmu
= *pmu
->type
->pmu
;
736 pmu
->pmu
.attr_groups
= pmu
->type
->attr_groups
;
739 if (pmu
->type
->num_boxes
== 1) {
740 if (strlen(pmu
->type
->name
) > 0)
741 sprintf(pmu
->name
, "uncore_%s", pmu
->type
->name
);
743 sprintf(pmu
->name
, "uncore");
745 sprintf(pmu
->name
, "uncore_%s_%d", pmu
->type
->name
,
749 ret
= perf_pmu_register(&pmu
->pmu
, pmu
->name
, -1);
751 pmu
->registered
= true;
755 static void uncore_pmu_unregister(struct intel_uncore_pmu
*pmu
)
757 if (!pmu
->registered
)
759 perf_pmu_unregister(&pmu
->pmu
);
760 pmu
->registered
= false;
763 static void __uncore_exit_boxes(struct intel_uncore_type
*type
, int cpu
)
765 struct intel_uncore_pmu
*pmu
= type
->pmus
;
766 struct intel_uncore_box
*box
;
770 pkg
= topology_physical_package_id(cpu
);
771 for (i
= 0; i
< type
->num_boxes
; i
++, pmu
++) {
772 box
= pmu
->boxes
[pkg
];
774 uncore_box_exit(box
);
779 static void uncore_exit_boxes(void *dummy
)
781 struct intel_uncore_type
**types
;
783 for (types
= uncore_msr_uncores
; *types
; types
++)
784 __uncore_exit_boxes(*types
++, smp_processor_id());
787 static void uncore_free_boxes(struct intel_uncore_pmu
*pmu
)
791 for (pkg
= 0; pkg
< max_packages
; pkg
++)
792 kfree(pmu
->boxes
[pkg
]);
796 static void uncore_type_exit(struct intel_uncore_type
*type
)
798 struct intel_uncore_pmu
*pmu
= type
->pmus
;
802 for (i
= 0; i
< type
->num_boxes
; i
++, pmu
++) {
803 uncore_pmu_unregister(pmu
);
804 uncore_free_boxes(pmu
);
809 kfree(type
->events_group
);
810 type
->events_group
= NULL
;
813 static void uncore_types_exit(struct intel_uncore_type
**types
)
815 for (; *types
; types
++)
816 uncore_type_exit(*types
);
819 static int __init
uncore_type_init(struct intel_uncore_type
*type
, bool setid
)
821 struct intel_uncore_pmu
*pmus
;
822 struct attribute_group
*attr_group
;
823 struct attribute
**attrs
;
827 pmus
= kzalloc(sizeof(*pmus
) * type
->num_boxes
, GFP_KERNEL
);
831 size
= max_packages
* sizeof(struct intel_uncore_box
*);
833 for (i
= 0; i
< type
->num_boxes
; i
++) {
834 pmus
[i
].func_id
= setid
? i
: -1;
837 pmus
[i
].boxes
= kzalloc(size
, GFP_KERNEL
);
843 type
->unconstrainted
= (struct event_constraint
)
844 __EVENT_CONSTRAINT(0, (1ULL << type
->num_counters
) - 1,
845 0, type
->num_counters
, 0, 0);
847 if (type
->event_descs
) {
848 for (i
= 0; type
->event_descs
[i
].attr
.attr
.name
; i
++);
850 attr_group
= kzalloc(sizeof(struct attribute
*) * (i
+ 1) +
851 sizeof(*attr_group
), GFP_KERNEL
);
855 attrs
= (struct attribute
**)(attr_group
+ 1);
856 attr_group
->name
= "events";
857 attr_group
->attrs
= attrs
;
859 for (j
= 0; j
< i
; j
++)
860 attrs
[j
] = &type
->event_descs
[j
].attr
.attr
;
862 type
->events_group
= attr_group
;
865 type
->pmu_group
= &uncore_pmu_attr_group
;
870 uncore_types_init(struct intel_uncore_type
**types
, bool setid
)
874 for (; *types
; types
++) {
875 ret
= uncore_type_init(*types
, setid
);
883 * add a pci uncore device
885 static int uncore_pci_probe(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
887 struct intel_uncore_type
*type
;
888 struct intel_uncore_pmu
*pmu
= NULL
;
889 struct intel_uncore_box
*box
;
890 int phys_id
, pkg
, ret
;
892 phys_id
= uncore_pcibus_to_physid(pdev
->bus
);
896 pkg
= topology_phys_to_logical_pkg(phys_id
);
900 if (UNCORE_PCI_DEV_TYPE(id
->driver_data
) == UNCORE_EXTRA_PCI_DEV
) {
901 int idx
= UNCORE_PCI_DEV_IDX(id
->driver_data
);
903 uncore_extra_pci_dev
[pkg
].dev
[idx
] = pdev
;
904 pci_set_drvdata(pdev
, NULL
);
908 type
= uncore_pci_uncores
[UNCORE_PCI_DEV_TYPE(id
->driver_data
)];
911 * Some platforms, e.g. Knights Landing, use a common PCI device ID
912 * for multiple instances of an uncore PMU device type. We should check
913 * PCI slot and func to indicate the uncore box.
915 if (id
->driver_data
& ~0xffff) {
916 struct pci_driver
*pci_drv
= pdev
->driver
;
917 const struct pci_device_id
*ids
= pci_drv
->id_table
;
920 while (ids
&& ids
->vendor
) {
921 if ((ids
->vendor
== pdev
->vendor
) &&
922 (ids
->device
== pdev
->device
)) {
923 devfn
= PCI_DEVFN(UNCORE_PCI_DEV_DEV(ids
->driver_data
),
924 UNCORE_PCI_DEV_FUNC(ids
->driver_data
));
925 if (devfn
== pdev
->devfn
) {
926 pmu
= &type
->pmus
[UNCORE_PCI_DEV_IDX(ids
->driver_data
)];
936 * for performance monitoring unit with multiple boxes,
937 * each box has a different function id.
939 pmu
= &type
->pmus
[UNCORE_PCI_DEV_IDX(id
->driver_data
)];
942 if (WARN_ON_ONCE(pmu
->boxes
[pkg
] != NULL
))
945 box
= uncore_alloc_box(type
, NUMA_NO_NODE
);
949 if (pmu
->func_id
< 0)
950 pmu
->func_id
= pdev
->devfn
;
952 WARN_ON_ONCE(pmu
->func_id
!= pdev
->devfn
);
954 atomic_inc(&box
->refcnt
);
955 box
->pci_phys_id
= phys_id
;
959 uncore_box_init(box
);
960 pci_set_drvdata(pdev
, box
);
962 pmu
->boxes
[pkg
] = box
;
963 if (atomic_inc_return(&pmu
->activeboxes
) > 1)
966 /* First active box registers the pmu */
967 ret
= uncore_pmu_register(pmu
);
969 pci_set_drvdata(pdev
, NULL
);
970 pmu
->boxes
[pkg
] = NULL
;
971 uncore_box_exit(box
);
977 static void uncore_pci_remove(struct pci_dev
*pdev
)
979 struct intel_uncore_box
*box
;
980 struct intel_uncore_pmu
*pmu
;
983 phys_id
= uncore_pcibus_to_physid(pdev
->bus
);
984 pkg
= topology_phys_to_logical_pkg(phys_id
);
986 box
= pci_get_drvdata(pdev
);
988 for (i
= 0; i
< UNCORE_EXTRA_PCI_DEV_MAX
; i
++) {
989 if (uncore_extra_pci_dev
[pkg
].dev
[i
] == pdev
) {
990 uncore_extra_pci_dev
[pkg
].dev
[i
] = NULL
;
994 WARN_ON_ONCE(i
>= UNCORE_EXTRA_PCI_DEV_MAX
);
999 if (WARN_ON_ONCE(phys_id
!= box
->pci_phys_id
))
1002 pci_set_drvdata(pdev
, NULL
);
1003 pmu
->boxes
[pkg
] = NULL
;
1004 if (atomic_dec_return(&pmu
->activeboxes
) == 0)
1005 uncore_pmu_unregister(pmu
);
1006 uncore_box_exit(box
);
1010 static int __init
uncore_pci_init(void)
1015 size
= max_packages
* sizeof(struct pci_extra_dev
);
1016 uncore_extra_pci_dev
= kzalloc(size
, GFP_KERNEL
);
1017 if (!uncore_extra_pci_dev
) {
1022 ret
= uncore_types_init(uncore_pci_uncores
, false);
1026 uncore_pci_driver
->probe
= uncore_pci_probe
;
1027 uncore_pci_driver
->remove
= uncore_pci_remove
;
1029 ret
= pci_register_driver(uncore_pci_driver
);
1033 pcidrv_registered
= true;
1037 uncore_types_exit(uncore_pci_uncores
);
1038 kfree(uncore_extra_pci_dev
);
1039 uncore_extra_pci_dev
= NULL
;
1040 uncore_free_pcibus_map();
1042 uncore_pci_uncores
= empty_uncore
;
1046 static void uncore_pci_exit(void)
1048 if (pcidrv_registered
) {
1049 pcidrv_registered
= false;
1050 pci_unregister_driver(uncore_pci_driver
);
1051 uncore_types_exit(uncore_pci_uncores
);
1052 kfree(uncore_extra_pci_dev
);
1053 uncore_free_pcibus_map();
1057 static int uncore_cpu_dying(unsigned int cpu
)
1059 struct intel_uncore_type
*type
, **types
= uncore_msr_uncores
;
1060 struct intel_uncore_pmu
*pmu
;
1061 struct intel_uncore_box
*box
;
1064 pkg
= topology_logical_package_id(cpu
);
1065 for (; *types
; types
++) {
1068 for (i
= 0; i
< type
->num_boxes
; i
++, pmu
++) {
1069 box
= pmu
->boxes
[pkg
];
1070 if (box
&& atomic_dec_return(&box
->refcnt
) == 0)
1071 uncore_box_exit(box
);
1077 static int first_init
;
1079 static int uncore_cpu_starting(unsigned int cpu
)
1081 struct intel_uncore_type
*type
, **types
= uncore_msr_uncores
;
1082 struct intel_uncore_pmu
*pmu
;
1083 struct intel_uncore_box
*box
;
1084 int i
, pkg
, ncpus
= 1;
1088 * On init we get the number of online cpus in the package
1089 * and set refcount for all of them.
1091 ncpus
= cpumask_weight(topology_core_cpumask(cpu
));
1094 pkg
= topology_logical_package_id(cpu
);
1095 for (; *types
; types
++) {
1098 for (i
= 0; i
< type
->num_boxes
; i
++, pmu
++) {
1099 box
= pmu
->boxes
[pkg
];
1102 /* The first cpu on a package activates the box */
1103 if (atomic_add_return(ncpus
, &box
->refcnt
) == ncpus
)
1104 uncore_box_init(box
);
1111 static int uncore_cpu_prepare(unsigned int cpu
)
1113 struct intel_uncore_type
*type
, **types
= uncore_msr_uncores
;
1114 struct intel_uncore_pmu
*pmu
;
1115 struct intel_uncore_box
*box
;
1118 pkg
= topology_logical_package_id(cpu
);
1119 for (; *types
; types
++) {
1122 for (i
= 0; i
< type
->num_boxes
; i
++, pmu
++) {
1123 if (pmu
->boxes
[pkg
])
1125 /* First cpu of a package allocates the box */
1126 box
= uncore_alloc_box(type
, cpu_to_node(cpu
));
1131 pmu
->boxes
[pkg
] = box
;
1137 static void uncore_change_type_ctx(struct intel_uncore_type
*type
, int old_cpu
,
1140 struct intel_uncore_pmu
*pmu
= type
->pmus
;
1141 struct intel_uncore_box
*box
;
1144 pkg
= topology_logical_package_id(old_cpu
< 0 ? new_cpu
: old_cpu
);
1145 for (i
= 0; i
< type
->num_boxes
; i
++, pmu
++) {
1146 box
= pmu
->boxes
[pkg
];
1151 WARN_ON_ONCE(box
->cpu
!= -1);
1156 WARN_ON_ONCE(box
->cpu
!= old_cpu
);
1161 uncore_pmu_cancel_hrtimer(box
);
1162 perf_pmu_migrate_context(&pmu
->pmu
, old_cpu
, new_cpu
);
1167 static void uncore_change_context(struct intel_uncore_type
**uncores
,
1168 int old_cpu
, int new_cpu
)
1170 for (; *uncores
; uncores
++)
1171 uncore_change_type_ctx(*uncores
, old_cpu
, new_cpu
);
1174 static int uncore_event_cpu_offline(unsigned int cpu
)
1178 /* Check if exiting cpu is used for collecting uncore events */
1179 if (!cpumask_test_and_clear_cpu(cpu
, &uncore_cpu_mask
))
1182 /* Find a new cpu to collect uncore events */
1183 target
= cpumask_any_but(topology_core_cpumask(cpu
), cpu
);
1185 /* Migrate uncore events to the new target */
1186 if (target
< nr_cpu_ids
)
1187 cpumask_set_cpu(target
, &uncore_cpu_mask
);
1191 uncore_change_context(uncore_msr_uncores
, cpu
, target
);
1192 uncore_change_context(uncore_pci_uncores
, cpu
, target
);
1196 static int uncore_event_cpu_online(unsigned int cpu
)
1201 * Check if there is an online cpu in the package
1202 * which collects uncore events already.
1204 target
= cpumask_any_and(&uncore_cpu_mask
, topology_core_cpumask(cpu
));
1205 if (target
< nr_cpu_ids
)
1208 cpumask_set_cpu(cpu
, &uncore_cpu_mask
);
1210 uncore_change_context(uncore_msr_uncores
, -1, cpu
);
1211 uncore_change_context(uncore_pci_uncores
, -1, cpu
);
1215 static int __init
type_pmu_register(struct intel_uncore_type
*type
)
1219 for (i
= 0; i
< type
->num_boxes
; i
++) {
1220 ret
= uncore_pmu_register(&type
->pmus
[i
]);
1227 static int __init
uncore_msr_pmus_register(void)
1229 struct intel_uncore_type
**types
= uncore_msr_uncores
;
1232 for (; *types
; types
++) {
1233 ret
= type_pmu_register(*types
);
1240 static int __init
uncore_cpu_init(void)
1244 ret
= uncore_types_init(uncore_msr_uncores
, true);
1248 ret
= uncore_msr_pmus_register();
1253 uncore_types_exit(uncore_msr_uncores
);
1254 uncore_msr_uncores
= empty_uncore
;
1258 #define X86_UNCORE_MODEL_MATCH(model, init) \
1259 { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&init }
1261 struct intel_uncore_init_fun
{
1262 void (*cpu_init
)(void);
1263 int (*pci_init
)(void);
1266 static const struct intel_uncore_init_fun nhm_uncore_init __initconst
= {
1267 .cpu_init
= nhm_uncore_cpu_init
,
1270 static const struct intel_uncore_init_fun snb_uncore_init __initconst
= {
1271 .cpu_init
= snb_uncore_cpu_init
,
1272 .pci_init
= snb_uncore_pci_init
,
1275 static const struct intel_uncore_init_fun ivb_uncore_init __initconst
= {
1276 .cpu_init
= snb_uncore_cpu_init
,
1277 .pci_init
= ivb_uncore_pci_init
,
1280 static const struct intel_uncore_init_fun hsw_uncore_init __initconst
= {
1281 .cpu_init
= snb_uncore_cpu_init
,
1282 .pci_init
= hsw_uncore_pci_init
,
1285 static const struct intel_uncore_init_fun bdw_uncore_init __initconst
= {
1286 .cpu_init
= snb_uncore_cpu_init
,
1287 .pci_init
= bdw_uncore_pci_init
,
1290 static const struct intel_uncore_init_fun snbep_uncore_init __initconst
= {
1291 .cpu_init
= snbep_uncore_cpu_init
,
1292 .pci_init
= snbep_uncore_pci_init
,
1295 static const struct intel_uncore_init_fun nhmex_uncore_init __initconst
= {
1296 .cpu_init
= nhmex_uncore_cpu_init
,
1299 static const struct intel_uncore_init_fun ivbep_uncore_init __initconst
= {
1300 .cpu_init
= ivbep_uncore_cpu_init
,
1301 .pci_init
= ivbep_uncore_pci_init
,
1304 static const struct intel_uncore_init_fun hswep_uncore_init __initconst
= {
1305 .cpu_init
= hswep_uncore_cpu_init
,
1306 .pci_init
= hswep_uncore_pci_init
,
1309 static const struct intel_uncore_init_fun bdx_uncore_init __initconst
= {
1310 .cpu_init
= bdx_uncore_cpu_init
,
1311 .pci_init
= bdx_uncore_pci_init
,
1314 static const struct intel_uncore_init_fun knl_uncore_init __initconst
= {
1315 .cpu_init
= knl_uncore_cpu_init
,
1316 .pci_init
= knl_uncore_pci_init
,
1319 static const struct intel_uncore_init_fun skl_uncore_init __initconst
= {
1320 .cpu_init
= skl_uncore_cpu_init
,
1321 .pci_init
= skl_uncore_pci_init
,
1324 static const struct x86_cpu_id intel_uncore_match
[] __initconst
= {
1325 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_NEHALEM_EP
, nhm_uncore_init
),
1326 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_NEHALEM
, nhm_uncore_init
),
1327 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_WESTMERE
, nhm_uncore_init
),
1328 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_WESTMERE_EP
, nhm_uncore_init
),
1329 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SANDYBRIDGE
, snb_uncore_init
),
1330 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_IVYBRIDGE
, ivb_uncore_init
),
1331 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_CORE
, hsw_uncore_init
),
1332 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_ULT
, hsw_uncore_init
),
1333 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_GT3E
, hsw_uncore_init
),
1334 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_CORE
, bdw_uncore_init
),
1335 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_GT3E
, bdw_uncore_init
),
1336 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SANDYBRIDGE_X
, snbep_uncore_init
),
1337 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_NEHALEM_EX
, nhmex_uncore_init
),
1338 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_WESTMERE_EX
, nhmex_uncore_init
),
1339 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_IVYBRIDGE_X
, ivbep_uncore_init
),
1340 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_HASWELL_X
, hswep_uncore_init
),
1341 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_X
, bdx_uncore_init
),
1342 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_BROADWELL_XEON_D
, bdx_uncore_init
),
1343 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_XEON_PHI_KNL
, knl_uncore_init
),
1344 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SKYLAKE_DESKTOP
,skl_uncore_init
),
1345 X86_UNCORE_MODEL_MATCH(INTEL_FAM6_SKYLAKE_MOBILE
, skl_uncore_init
),
1349 MODULE_DEVICE_TABLE(x86cpu
, intel_uncore_match
);
1351 static int __init
intel_uncore_init(void)
1353 const struct x86_cpu_id
*id
;
1354 struct intel_uncore_init_fun
*uncore_init
;
1355 int pret
= 0, cret
= 0, ret
;
1357 id
= x86_match_cpu(intel_uncore_match
);
1361 if (boot_cpu_has(X86_FEATURE_HYPERVISOR
))
1364 max_packages
= topology_max_packages();
1366 uncore_init
= (struct intel_uncore_init_fun
*)id
->driver_data
;
1367 if (uncore_init
->pci_init
) {
1368 pret
= uncore_init
->pci_init();
1370 pret
= uncore_pci_init();
1373 if (uncore_init
->cpu_init
) {
1374 uncore_init
->cpu_init();
1375 cret
= uncore_cpu_init();
1382 * Install callbacks. Core will call them for each online cpu.
1384 * The first online cpu of each package allocates and takes
1385 * the refcounts for all other online cpus in that package.
1386 * If msrs are not enabled no allocation is required and
1387 * uncore_cpu_prepare() is not called for each online cpu.
1390 ret
= cpuhp_setup_state(CPUHP_PERF_X86_UNCORE_PREP
,
1391 "PERF_X86_UNCORE_PREP",
1392 uncore_cpu_prepare
, NULL
);
1396 cpuhp_setup_state_nocalls(CPUHP_PERF_X86_UNCORE_PREP
,
1397 "PERF_X86_UNCORE_PREP",
1398 uncore_cpu_prepare
, NULL
);
1401 cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_STARTING
,
1402 "AP_PERF_X86_UNCORE_STARTING",
1403 uncore_cpu_starting
, uncore_cpu_dying
);
1405 cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE
,
1406 "AP_PERF_X86_UNCORE_ONLINE",
1407 uncore_event_cpu_online
, uncore_event_cpu_offline
);
1411 /* Undo box->init_box() */
1412 on_each_cpu_mask(&uncore_cpu_mask
, uncore_exit_boxes
, NULL
, 1);
1413 uncore_types_exit(uncore_msr_uncores
);
1417 module_init(intel_uncore_init
);
1419 static void __exit
intel_uncore_exit(void)
1421 cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_UNCORE_ONLINE
);
1422 cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_UNCORE_STARTING
);
1423 cpuhp_remove_state_nocalls(CPUHP_PERF_X86_UNCORE_PREP
);
1424 uncore_types_exit(uncore_msr_uncores
);
1427 module_exit(intel_uncore_exit
);