linux-kernel - [PATCH 19/49] perf/x86: Support filter

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Date:   Mon,  8 Feb 2021 07:25:16 -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 19/49] perf/x86: Support filter_match callback

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

Implement filter_match callback for X86, which check whether an event is
schedulable on the current CPU.

Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---
 arch/x86/events/core.c       | 10 ++++++++++
 arch/x86/events/perf_event.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 4d9dd83c..b68d38a 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2613,6 +2613,14 @@ static int x86_pmu_aux_output_match(struct perf_event *event)
 	return 0;
 }
 
+static int x86_pmu_filter_match(struct perf_event *event)
+{
+	if (x86_pmu.filter_match)
+		return x86_pmu.filter_match(event);
+
+	return 1;
+}
+
 static struct pmu pmu = {
 	.pmu_enable		= x86_pmu_enable,
 	.pmu_disable		= x86_pmu_disable,
@@ -2640,6 +2648,8 @@ static struct pmu pmu = {
 	.check_period		= x86_pmu_check_period,
 
 	.aux_output_match	= x86_pmu_aux_output_match,
+
+	.filter_match		= x86_pmu_filter_match,
 };
 
 void arch_perf_update_userpage(struct perf_event *event,
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index 84d629d..5759f96 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -900,6 +900,7 @@ struct x86_pmu {
 	 */
 	unsigned long			hybrid_pmu_bitmap;
 	struct x86_hybrid_pmu		hybrid_pmu[X86_HYBRID_PMU_MAX_INDEX];
+	int				(*filter_match)(struct perf_event *event);
 };
 
 struct x86_perf_task_context_opt {
-- 
2.7.4