linux-kernel - [PATCH V2 09/25] perf/x86: Hybrid PMU support for event constraints

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Date:   Wed, 10 Mar 2021 08:37:45 -0800
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, mingo@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     acme@...nel.org, tglx@...utronix.de, bp@...en8.de,
        namhyung@...nel.org, jolsa@...hat.com, ak@...ux.intel.com,
        yao.jin@...ux.intel.com, alexander.shishkin@...ux.intel.com,
        adrian.hunter@...el.com, Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH V2 09/25] perf/x86: Hybrid PMU support for event constraints

From: Kan Liang <kan.liang@...ux.intel.com>

The events are different among hybrid PMUs. Each hybrid PMU should use
its own event constraints.

Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---
 arch/x86/events/core.c       | 3 ++-
 arch/x86/events/intel/core.c | 5 +++--
 arch/x86/events/intel/ds.c   | 5 +++--
 arch/x86/events/perf_event.h | 2 ++
 4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 1db4a67..38c271a 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -1522,6 +1522,7 @@ void perf_event_print_debug(void)
 	struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
 	int num_counters = hybrid(cpuc->pmu, num_counters);
 	int num_counters_fixed = hybrid(cpuc->pmu, num_counters_fixed);
+	struct event_constraint *pebs_constraints = hybrid(cpuc->pmu, pebs_constraints);
 	unsigned long flags;
 	int idx;
 
@@ -1541,7 +1542,7 @@ void perf_event_print_debug(void)
 		pr_info("CPU#%d: status:     %016llx\n", cpu, status);
 		pr_info("CPU#%d: overflow:   %016llx\n", cpu, overflow);
 		pr_info("CPU#%d: fixed:      %016llx\n", cpu, fixed);
-		if (x86_pmu.pebs_constraints) {
+		if (pebs_constraints) {
 			rdmsrl(MSR_IA32_PEBS_ENABLE, pebs);
 			pr_info("CPU#%d: pebs:       %016llx\n", cpu, pebs);
 		}
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 540dba2..572509f 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -3136,10 +3136,11 @@ struct event_constraint *
 x86_get_event_constraints(struct cpu_hw_events *cpuc, int idx,
 			  struct perf_event *event)
 {
+	struct event_constraint *event_constraints = hybrid(cpuc->pmu, event_constraints);
 	struct event_constraint *c;
 
-	if (x86_pmu.event_constraints) {
-		for_each_event_constraint(c, x86_pmu.event_constraints) {
+	if (event_constraints) {
+		for_each_event_constraint(c, event_constraints) {
 			if (constraint_match(c, event->hw.config)) {
 				event->hw.flags |= c->flags;
 				return c;
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index 312bf3b..f1402bc 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -959,13 +959,14 @@ struct event_constraint intel_spr_pebs_event_constraints[] = {
 
 struct event_constraint *intel_pebs_constraints(struct perf_event *event)
 {
+	struct event_constraint *pebs_constraints = hybrid(event->pmu, pebs_constraints);
 	struct event_constraint *c;
 
 	if (!event->attr.precise_ip)
 		return NULL;
 
-	if (x86_pmu.pebs_constraints) {
-		for_each_event_constraint(c, x86_pmu.pebs_constraints) {
+	if (pebs_constraints) {
+		for_each_event_constraint(c, pebs_constraints) {
 			if (constraint_match(c, event->hw.config)) {
 				event->hw.flags |= c->flags;
 				return c;
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index f464bda..9316fec 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -649,6 +649,8 @@ struct x86_hybrid_pmu {
 					[PERF_COUNT_HW_CACHE_MAX]
 					[PERF_COUNT_HW_CACHE_OP_MAX]
 					[PERF_COUNT_HW_CACHE_RESULT_MAX];
+	struct event_constraint		*event_constraints;
+	struct event_constraint		*pebs_constraints;
 };
 
 static __always_inline bool is_hybrid(void)
-- 
2.7.4