[tip: perf/core] perf/x86: Support filter_match callback

[tip-bot2 for Kan Liang]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     3e9a8b219e4cc897dba20e19185d0471f129f6f3
Gitweb:        https://git.kernel.org/tip/3e9a8b219e4cc897dba20e19185d0471f129f6f3
Author:        Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
AuthorDate:    Mon, 12 Apr 2021 07:30:59 -07:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Mon, 19 Apr 2021 20:03:28 +02:00

perf/x86: Support filter_match callback

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

Signed-off-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/1618237865-33448-20-git-send-email-kan.liang@xxxxxxxxxxxxxxx
---
 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 37ab109..4f6595e 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2641,6 +2641,14 @@ 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,
@@ -2668,6 +2676,8 @@ 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 e2be927..606fb6e 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -879,6 +879,7 @@ struct x86_pmu {
 
 	int (*aux_output_match) (struct perf_event *event);
 
+	int (*filter_match)(struct perf_event *event);
 	/*
 	 * Hybrid support
 	 *