linux-kernel - [PATCH V4 19/25] perf/x86: Support filter

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Message-Id: <1617322252-154215-20-git-send-email-kan.liang@linux.intel.com>
Date:   Thu,  1 Apr 2021 17:10:46 -0700
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 V4 19/25] 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 19e026a..18b75d6 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2650,6 +2650,14 @@ 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,
@@ -2677,6 +2685,8 @@ 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 c1c90c3..f996686 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -870,6 +870,7 @@ struct x86_pmu {
 
 	int (*aux_output_match) (struct perf_event *event);
 
+	int (*filter_match)(struct perf_event *event);
 	/*
 	 * Hybrid support
 	 *
-- 
2.7.4