perf/x86/uncore: Apply the unit control RB tree to MSR uncore units

The unit control RB tree has the unit control and unit ID information
for all the MSR units. Use them to replace the box_ctl and
uncore_msr_box_ctl() to get an accurate unit control address for MSR
uncore units.

Add intel_generic_uncore_assign_hw_event(), which utilizes the accurate
unit control address from the unit control RB tree to calculate the
config_base and event_base.

The unit id related information should be retrieved from the unit
control RB tree as well.

Signed-off-by: Kan Liang <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Yunying Sun <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Kan Liang

arch/x86/events/intel/uncore.c

@@ -263,6 +263,9 @@ static void uncore_assign_hw_event(struct intel_uncore_box *box,
 		return;
 	}
 
+	if (intel_generic_uncore_assign_hw_event(event, box))
+		return;
+
 	hwc->config_base = uncore_event_ctl(box, hwc->idx);
 	hwc->event_base  = uncore_perf_ctr(box, hwc->idx);
 }

arch/x86/events/intel/uncore_discovery.c

@@ -499,19 +499,31 @@ static const struct attribute_group generic_uncore_format_group = {
 	.attrs = generic_uncore_formats_attr,
 };
 
+static u64 intel_generic_uncore_box_ctl(struct intel_uncore_box *box)
+{
+	struct intel_uncore_discovery_unit *unit;
+
+	unit = intel_uncore_find_discovery_unit(box->pmu->type->boxes,
+						-1, box->pmu->pmu_idx);
+	if (WARN_ON_ONCE(!unit))
+		return 0;
+
+	return unit->addr;
+}
+
 void intel_generic_uncore_msr_init_box(struct intel_uncore_box *box)
 {
-	wrmsrl(uncore_msr_box_ctl(box), GENERIC_PMON_BOX_CTL_INT);
+	wrmsrl(intel_generic_uncore_box_ctl(box), GENERIC_PMON_BOX_CTL_INT);
 }
 
 void intel_generic_uncore_msr_disable_box(struct intel_uncore_box *box)
 {
-	wrmsrl(uncore_msr_box_ctl(box), GENERIC_PMON_BOX_CTL_FRZ);
+	wrmsrl(intel_generic_uncore_box_ctl(box), GENERIC_PMON_BOX_CTL_FRZ);
 }
 
 void intel_generic_uncore_msr_enable_box(struct intel_uncore_box *box)
 {
-	wrmsrl(uncore_msr_box_ctl(box), 0);
+	wrmsrl(intel_generic_uncore_box_ctl(box), 0);
 }
 
 static void intel_generic_uncore_msr_enable_event(struct intel_uncore_box *box,
@@ -539,6 +551,31 @@ static struct intel_uncore_ops generic_uncore_msr_ops = {
 	.read_counter		= uncore_msr_read_counter,
 };
 
+bool intel_generic_uncore_assign_hw_event(struct perf_event *event,
+					  struct intel_uncore_box *box)
+{
+	struct hw_perf_event *hwc = &event->hw;
+	u64 box_ctl;
+
+	if (!box->pmu->type->boxes)
+		return false;
+
+	if (box->pci_dev || box->io_addr) {
+		hwc->config_base = uncore_pci_event_ctl(box, hwc->idx);
+		hwc->event_base  = uncore_pci_perf_ctr(box, hwc->idx);
+		return true;
+	}
+
+	box_ctl = intel_generic_uncore_box_ctl(box);
+	if (!box_ctl)
+		return false;
+
+	hwc->config_base = box_ctl + box->pmu->type->event_ctl + hwc->idx;
+	hwc->event_base  = box_ctl + box->pmu->type->perf_ctr + hwc->idx;
+
+	return true;
+}
+
 void intel_generic_uncore_pci_init_box(struct intel_uncore_box *box)
 {
 	struct pci_dev *pdev = box->pci_dev;
@@ -697,10 +734,12 @@ static bool uncore_update_uncore_type(enum uncore_access_type type_id,
 	switch (type_id) {
 	case UNCORE_ACCESS_MSR:
 		uncore->ops = &generic_uncore_msr_ops;
-		uncore->perf_ctr = (unsigned int)type->box_ctrl + type->ctr_offset;
-		uncore->event_ctl = (unsigned int)type->box_ctrl + type->ctl_offset;
+		uncore->perf_ctr = (unsigned int)type->ctr_offset;
+		uncore->event_ctl = (unsigned int)type->ctl_offset;
 		uncore->box_ctl = (unsigned int)type->box_ctrl;
 		uncore->msr_offsets = type->box_offset;
+		uncore->boxes = &type->units;
+		uncore->num_boxes = type->num_units;
 		break;
 	case UNCORE_ACCESS_PCI:
 		uncore->ops = &generic_uncore_pci_ops;

arch/x86/events/intel/uncore_discovery.h

@@ -169,3 +169,5 @@ intel_uncore_generic_init_uncores(enum uncore_access_type type_id, int num_extra
 
 int intel_uncore_find_discovery_unit_id(struct rb_root *units, int die,
 					unsigned int pmu_idx);
+bool intel_generic_uncore_assign_hw_event(struct perf_event *event,
+					  struct intel_uncore_box *box);

arch/x86/events/intel/uncore_snbep.c

@@ -5933,10 +5933,11 @@ static int spr_cha_hw_config(struct intel_uncore_box *box, struct perf_event *ev
 	struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
 	bool tie_en = !!(event->hw.config & SPR_CHA_PMON_CTL_TID_EN);
 	struct intel_uncore_type *type = box->pmu->type;
+	int id = intel_uncore_find_discovery_unit_id(type->boxes, -1, box->pmu->pmu_idx);
 
 	if (tie_en) {
 		reg1->reg = SPR_C0_MSR_PMON_BOX_FILTER0 +
-			    HSWEP_CBO_MSR_OFFSET * type->box_ids[box->pmu->pmu_idx];
+			    HSWEP_CBO_MSR_OFFSET * id;
 		reg1->config = event->attr.config1 & SPR_CHA_PMON_BOX_FILTER_TID;
 		reg1->idx = 0;
 	}
@@ -6460,18 +6461,21 @@ uncore_find_type_by_id(struct intel_uncore_type **types, int type_id)
 static int uncore_type_max_boxes(struct intel_uncore_type **types,
 				 int type_id)
 {
+	struct intel_uncore_discovery_unit *unit;
 	struct intel_uncore_type *type;
-	int i, max = 0;
+	struct rb_node *node;
+	int max = 0;
 
 	type = uncore_find_type_by_id(types, type_id);
 	if (!type)
 		return 0;
 
-	for (i = 0; i < type->num_boxes; i++) {
-		if (type->box_ids[i] > max)
-			max = type->box_ids[i];
-	}
+	for (node = rb_first(type->boxes); node; node = rb_next(node)) {
+		unit = rb_entry(node, struct intel_uncore_discovery_unit, node);
 
+		if (unit->id > max)
+			max = unit->id;
+	}
 	return max + 1;
 }