linux-kernel - [RFC PATCH 16/18] drivers/perf: apple

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Message-Id: <20241217212317.3709478-1-oliver.upton@linux.dev>
Date: Tue, 17 Dec 2024 13:23:17 -0800
From: Oliver Upton <oliver.upton@...ux.dev>
To: kvmarm@...ts.linux.dev
Cc: Marc Zyngier <maz@...nel.org>,
	Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Mingwei Zhang <mizhang@...gle.com>,
	Colton Lewis <coltonlewis@...gle.com>,
	Raghavendra Rao Ananta <rananta@...gle.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Oliver Upton <oliver.upton@...ux.dev>
Subject: [RFC PATCH 16/18] drivers/perf: apple_m1: Map a few more PMUv3 events

Map some more PMUv3 events onto hardware so 'perf stat' in a KVM VM can
show some useful information (e.g. IPC, branch prediction rate).

Signed-off-by: Oliver Upton <oliver.upton@...ux.dev>
---
 drivers/perf/apple_m1_cpu_pmu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/perf/apple_m1_cpu_pmu.c b/drivers/perf/apple_m1_cpu_pmu.c
index b4fe247543a6..0e54d3f900a7 100644
--- a/drivers/perf/apple_m1_cpu_pmu.c
+++ b/drivers/perf/apple_m1_cpu_pmu.c
@@ -180,7 +180,10 @@ static const unsigned m1_pmu_perf_map[PERF_COUNT_HW_MAX] = {
 
 static const unsigned int m1_pmu_pmceid_map[ARMV8_PMUV3_MAX_COMMON_EVENTS] = {
 	[0 ... ARMV8_PMUV3_MAX_COMMON_EVENTS - 1]	= HW_OP_UNSUPPORTED,
+	M1_PMUV3_EVENT_MAP(INST_RETIRED,	INST_ALL),
 	M1_PMUV3_EVENT_MAP(CPU_CYCLES,		CORE_ACTIVE_CYCLE),
+	M1_PMUV3_EVENT_MAP(BR_RETIRED,		INST_BRANCH),
+	M1_PMUV3_EVENT_MAP(BR_MIS_PRED_RETIRED,	BRANCH_MISPRED_NONSPEC),
 };
 
 /* sysfs definitions */
-- 
2.39.5