linux-kernel - [PATCH 2/3] arm64: perf: add support for Cortex-A75

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Message-ID: <20200619184535.44835b99@xhacker.debian>
Date:   Fri, 19 Jun 2020 18:45:35 +0800
From:   Jisheng Zhang <Jisheng.Zhang@...aptics.com>
To:     Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] arm64: perf: add support for Cortex-A75

The Cortex-A75 uses some implementation defined perf events. This
patch sets up the necessary mapping for Cortex-A75.

Mappings are based on Cortex-A75 TRM r3p1, section C2.3 PMU Events
(pages C2-578 to C2-586).

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
---
 arch/arm64/kernel/perf_event.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 743affbe0cca..55e1d75af708 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -123,6 +123,21 @@ static const unsigned armv8_a73_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 	[C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)]	= ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR,
 };
 
+static const unsigned armv8_a75_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
+					      [PERF_COUNT_HW_CACHE_OP_MAX]
+					      [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
+	PERF_CACHE_MAP_ALL_UNSUPPORTED,
+
+	[C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]	= ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD,
+	[C(L1D)][C(OP_READ)][C(RESULT_MISS)]	= ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD,
+	[C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)]	= ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR,
+	[C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]	= ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR,
+
+
+	[C(NODE)][C(OP_READ)][C(RESULT_ACCESS)]	= ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD,
+	[C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR,
+};
+
 static const unsigned armv8_thunder_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 						   [PERF_COUNT_HW_CACHE_OP_MAX]
 						   [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
@@ -940,6 +955,11 @@ static int armv8_a73_map_event(struct perf_event *event)
 	return __armv8_pmuv3_map_event(event, NULL, &armv8_a73_perf_cache_map);
 }
 
+static int armv8_a75_map_event(struct perf_event *event)
+{
+	return __armv8_pmuv3_map_event(event, NULL, &armv8_a75_perf_cache_map);
+}
+
 static int armv8_thunder_map_event(struct perf_event *event)
 {
 	return __armv8_pmuv3_map_event(event, NULL,
@@ -1101,7 +1121,7 @@ static int armv8_a73_pmu_init(struct arm_pmu *cpu_pmu)
 static int armv8_a75_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a75",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_a75_map_event, NULL, NULL);
 }
 
 static int armv8_a76_pmu_init(struct arm_pmu *cpu_pmu)
-- 
2.27.0