linux-kernel - [PATCH 06/49] perf/x86: Hybrid PMU support for unconstrained

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Message-Id: <1612797946-18784-7-git-send-email-kan.liang@linux.intel.com>
Date:   Mon,  8 Feb 2021 07:25:03 -0800
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, acme@...nel.org, mingo@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     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 06/49] perf/x86: Hybrid PMU support for unconstrained

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

The unconstrained value depends on the number of GP and fixed counters.
Each hybrid PMU should use its own unconstrained.

Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---
 arch/x86/events/intel/core.c | 5 ++++-
 arch/x86/events/perf_event.h | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 3b8d728..9baa6b6 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -3147,7 +3147,10 @@ x86_get_event_constraints(struct cpu_hw_events *cpuc, int idx,
 		}
 	}
 
-	return &unconstrained;
+	if (!HAS_VALID_HYBRID_PMU_IN_CPUC(cpuc))
+		return &unconstrained;
+
+	return &x86_pmu.hybrid_pmu[cpuc->hybrid_pmu_idx].unconstrained;
 }
 
 static struct event_constraint *
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index bda4bdc..f11dbc4 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -651,6 +651,7 @@ struct x86_hybrid_pmu {
 	int				max_pebs_events;
 	int				num_counters;
 	int				num_counters_fixed;
+	struct event_constraint		unconstrained;
 };
 
 #define IS_X86_HYBRID			cpu_feature_enabled(X86_FEATURE_HYBRID_CPU)
-- 
2.7.4