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Message-Id: <99221ea1d43420d01da126432247ce713f3f7148.1452766568.git.jglauber@cavium.com>
Date: Thu, 14 Jan 2016 13:55:42 +0100
From: Jan Glauber <jan.glauber@...il.com>
To: Will Deacon <will.deacon@....com>,
Mark Rutland <mark.rutland@....com>
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Jan Glauber <jglauber@...ium.com>
Subject: [RFC PATCH 2/5] arm64/perf: Add Cavium ThunderX PMU support
Support PMU events on Caviums ThunderX SOC. ThunderX supports
some additional counters compared to the default ARMv8 PMUv3:
- branch instructions counter
- stall frontend & backend counters
- L1 dcache load & store counters
- L1 icache counters
- iTLB & dTLB counters
- L1 dcache & icache prefetch counters
Signed-off-by: Jan Glauber <jglauber@...ium.com>
---
arch/arm64/kernel/perf_event.c | 69 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 68 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 32fe656..cf2cc39 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -94,10 +94,19 @@
#define ARMV8_PMUV3_PERFCTR_L1_DCACHE_REFILL_ST 0x43
#define ARMV8_PMUV3_PERFCTR_DTLB_REFILL_LD 0x4C
#define ARMV8_PMUV3_PERFCTR_DTLB_REFILL_ST 0x4D
+#define ARMV8_PMUV3_PERFCTR_DTLB_ACCESS_LD 0x4E
+#define ARMV8_PMUV3_PERFCTR_DTLB_ACCESS_ST 0x4F
/* ARMv8 Cortex-A53 specific event types. */
#define ARMV8_A53_PERFCTR_PREFETCH_LINEFILL 0xC2
+/* ARMv8 Cavium ThunderX specific event types. */
+#define ARMV8_THUNDERX_PERFCTR_L1_DCACHE_MISS_ST 0xE9
+#define ARMV8_THUNDERX_PERFCTR_L1_DCACHE_PREF_ACCESS 0xEA
+#define ARMV8_THUNDERX_PERFCTR_L1_DCACHE_PREF_MISS 0xEB
+#define ARMV8_THUNDERX_PERFCTR_L1_ICACHE_PREF_ACCESS 0xEC
+#define ARMV8_THUNDERX_PERFCTR_L1_ICACHE_PREF_MISS 0xED
+
/* PMUv3 HW events mapping. */
static const unsigned armv8_pmuv3_perf_map[PERF_COUNT_HW_MAX] = {
PERF_MAP_ALL_UNSUPPORTED,
@@ -131,6 +140,18 @@ static const unsigned armv8_a57_perf_map[PERF_COUNT_HW_MAX] = {
[PERF_COUNT_HW_BUS_CYCLES] = ARMV8_PMUV3_PERFCTR_BUS_CYCLES,
};
+static const unsigned armv8_thunderx_perf_map[PERF_COUNT_HW_MAX] = {
+ PERF_MAP_ALL_UNSUPPORTED,
+ [PERF_COUNT_HW_CPU_CYCLES] = ARMV8_PMUV3_PERFCTR_CLOCK_CYCLES,
+ [PERF_COUNT_HW_INSTRUCTIONS] = ARMV8_PMUV3_PERFCTR_INSTR_EXECUTED,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV8_PMUV3_PERFCTR_L1_DCACHE_ACCESS,
+ [PERF_COUNT_HW_CACHE_MISSES] = ARMV8_PMUV3_PERFCTR_L1_DCACHE_REFILL,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV8_PMUV3_PERFCTR_PC_WRITE,
+ [PERF_COUNT_HW_BRANCH_MISSES] = ARMV8_PMUV3_PERFCTR_PC_BRANCH_MIS_PRED,
+ [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV8_PMUV3_PERFCTR_STALL_FRONTEND,
+ [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = ARMV8_PMUV3_PERFCTR_STALL_BACKEND,
+};
+
static const unsigned armv8_pmuv3_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
[PERF_COUNT_HW_CACHE_OP_MAX]
[PERF_COUNT_HW_CACHE_RESULT_MAX] = {
@@ -193,6 +214,36 @@ static const unsigned armv8_a57_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
[C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_PC_BRANCH_MIS_PRED,
};
+static const unsigned armv8_thunderx_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_PMUV3_PERFCTR_L1_DCACHE_ACCESS_LD,
+ [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1_DCACHE_REFILL_LD,
+ [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1_DCACHE_ACCESS_ST,
+ [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_THUNDERX_PERFCTR_L1_DCACHE_MISS_ST,
+ [C(L1D)][C(OP_PREFETCH)][C(RESULT_ACCESS)] = ARMV8_THUNDERX_PERFCTR_L1_DCACHE_PREF_ACCESS,
+ [C(L1D)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV8_THUNDERX_PERFCTR_L1_DCACHE_PREF_MISS,
+
+ [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1_ICACHE_ACCESS,
+ [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1_ICACHE_REFILL,
+ [C(L1I)][C(OP_PREFETCH)][C(RESULT_ACCESS)] = ARMV8_THUNDERX_PERFCTR_L1_ICACHE_PREF_ACCESS,
+ [C(L1I)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV8_THUNDERX_PERFCTR_L1_ICACHE_PREF_MISS,
+
+ [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_DTLB_ACCESS_LD,
+ [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_DTLB_REFILL_LD,
+ [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_DTLB_ACCESS_ST,
+ [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_DTLB_REFILL_ST,
+
+ [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_ITLB_REFILL,
+
+ [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_PC_BRANCH_PRED,
+ [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_PC_BRANCH_MIS_PRED,
+ [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_PC_BRANCH_PRED,
+ [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_PC_BRANCH_MIS_PRED,
+};
+
#define ARMV8_EVENT_ATTR_RESOLVE(m) #m
#define ARMV8_EVENT_ATTR(name, config) \
PMU_EVENT_ATTR_STRING(name, armv8_event_attr_##name, \
@@ -324,7 +375,6 @@ static const struct attribute_group *armv8_pmuv3_attr_groups[] = {
NULL,
};
-
/*
* Perf Events' indices
*/
@@ -743,6 +793,13 @@ static int armv8_a57_map_event(struct perf_event *event)
ARMV8_EVTYPE_EVENT);
}
+static int armv8_thunderx_map_event(struct perf_event *event)
+{
+ return armpmu_map_event(event, &armv8_thunderx_perf_map,
+ &armv8_thunderx_perf_cache_map,
+ ARMV8_EVTYPE_EVENT);
+}
+
static void armv8pmu_read_num_pmnc_events(void *info)
{
int *nb_cnt = info;
@@ -811,11 +868,21 @@ static int armv8_a72_pmu_init(struct arm_pmu *cpu_pmu)
return armv8pmu_probe_num_events(cpu_pmu);
}
+static int armv8_thunderx_pmu_init(struct arm_pmu *cpu_pmu)
+{
+ armv8_pmu_init(cpu_pmu);
+ cpu_pmu->name = "armv8_cavium_thunderx";
+ cpu_pmu->map_event = armv8_thunderx_map_event;
+ cpu_pmu->pmu.attr_groups = armv8_pmuv3_attr_groups;
+ return armv8pmu_probe_num_events(cpu_pmu);
+}
+
static const struct of_device_id armv8_pmu_of_device_ids[] = {
{.compatible = "arm,armv8-pmuv3", .data = armv8_pmuv3_init},
{.compatible = "arm,cortex-a53-pmu", .data = armv8_a53_pmu_init},
{.compatible = "arm,cortex-a57-pmu", .data = armv8_a57_pmu_init},
{.compatible = "arm,cortex-a72-pmu", .data = armv8_a72_pmu_init},
+ {.compatible = "cavium,thunderx-pmu", .data = armv8_thunderx_pmu_init},
{},
};
--
1.9.1
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