linux-kernel - [PATCH v1] drivers/perf: apple_m1: fix affinity table for event 0x96 and 0x9b

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Date: Thu, 20 Jun 2024 11:04:28 +0800
From: Yangyu Chen <cyy@...self.name>
To: linux-arm-kernel@...ts.infradead.org
Cc: Marc Zyngier <maz@...nel.org>,
	Will Deacon <will@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Janne Grunau <j@...nau.net>,
	Hector Martin <marcan@...can.st>,
	Asahi Lina <lina@...hilina.net>,
	asahi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Yangyu Chen <cyy@...self.name>
Subject: [PATCH v1] drivers/perf: apple_m1: fix affinity table for event 0x96 and 0x9b

Events 0x96 and 0x9b can be installed on counter 7 only. Fix this to avoid
getting the wrong counter value.

Signed-off-by: Yangyu Chen <cyy@...self.name>
---
 drivers/perf/apple_m1_cpu_pmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/perf/apple_m1_cpu_pmu.c b/drivers/perf/apple_m1_cpu_pmu.c
index f322e5ca1114..b8127e5428e1 100644
--- a/drivers/perf/apple_m1_cpu_pmu.c
+++ b/drivers/perf/apple_m1_cpu_pmu.c
@@ -107,12 +107,12 @@ static const u16 m1_pmu_event_affinity[M1_PMU_PERFCTR_LAST + 1] = {
 	[M1_PMU_PERFCTR_UNKNOWN_93]	= ONLY_5_6_7,
 	[M1_PMU_PERFCTR_UNKNOWN_94]	= ONLY_5_6_7,
 	[M1_PMU_PERFCTR_UNKNOWN_95]	= ONLY_5_6_7,
-	[M1_PMU_PERFCTR_UNKNOWN_96]	= ONLY_5_6_7,
+	[M1_PMU_PERFCTR_UNKNOWN_96]	= BIT(7),
 	[M1_PMU_PERFCTR_UNKNOWN_97]	= BIT(7),
 	[M1_PMU_PERFCTR_UNKNOWN_98]	= ONLY_5_6_7,
 	[M1_PMU_PERFCTR_UNKNOWN_99]	= ONLY_5_6_7,
 	[M1_PMU_PERFCTR_UNKNOWN_9a]	= BIT(7),
-	[M1_PMU_PERFCTR_UNKNOWN_9b]	= ONLY_5_6_7,
+	[M1_PMU_PERFCTR_UNKNOWN_9b]	= BIT(7),
 	[M1_PMU_PERFCTR_UNKNOWN_9c]	= ONLY_5_6_7,
 	[M1_PMU_PERFCTR_UNKNOWN_9f]	= BIT(7),
 	[M1_PMU_PERFCTR_UNKNOWN_bf]	= ONLY_5_6_7,
-- 
2.45.1