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From:   kan.liang@linux.intel.com
To:     peterz@infradead.org, mingo@kernel.org,
        linux-kernel@vger.kernel.org
Cc:     acme@kernel.org, tglx@linutronix.de, bp@alien8.de,
        namhyung@kernel.org, jolsa@redhat.com, ak@linux.intel.com,
        yao.jin@linux.intel.com, alexander.shishkin@linux.intel.com,
        adrian.hunter@intel.com, ricardo.neri-calderon@linux.intel.com,
        Kan Liang <kan.liang@linux.intel.com>
Subject: [PATCH V6 09/25] perf/x86: Hybrid PMU support for event constraints
Date:   Mon, 12 Apr 2021 07:30:49 -0700
Message-Id: <1618237865-33448-10-git-send-email-kan.liang@linux.intel.com>
In-Reply-To: <1618237865-33448-1-git-send-email-kan.liang@linux.intel.com>
References: <1618237865-33448-1-git-send-email-kan.liang@linux.intel.com>
Precedence: bulk

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

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

Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.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 a5f8a5e..f3e6fb0 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -1519,6 +1519,7 @@ 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;
 
@@ -1538,7 +1539,7 @@ 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 4cfc382f..447a80f 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 10ef244..a38c5b6 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 struct x86_hybrid_pmu *hybrid_pmu(struct pmu *pmu)
-- 
2.7.4