[PATCH 10/11] ARM: perf: add support for the Cortex-A5 PMU
Will Deacon
will.deacon at arm.com
Mon Jun 6 12:55:54 EDT 2011
This patch adds support for the Cortex-A5 PMU to the ARMv7 perf-event
backend.
Signed-off-by: Will Deacon <will.deacon at arm.com>
---
arch/arm/include/asm/perf_event.h | 1 +
arch/arm/kernel/perf_event.c | 3 +
arch/arm/kernel/perf_event_v7.c | 146 +++++++++++++++++++++++++++++++++++++
3 files changed, 150 insertions(+), 0 deletions(-)
diff --git a/arch/arm/include/asm/perf_event.h b/arch/arm/include/asm/perf_event.h
index c4aa4e8..207bd3c 100644
--- a/arch/arm/include/asm/perf_event.h
+++ b/arch/arm/include/asm/perf_event.h
@@ -24,6 +24,7 @@ enum arm_perf_pmu_ids {
ARM_PERF_PMU_ID_V6MP,
ARM_PERF_PMU_ID_CA8,
ARM_PERF_PMU_ID_CA9,
+ ARM_PERF_PMU_ID_CA5,
ARM_NUM_PMU_IDS,
};
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index d53c0ab..df4e517 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -660,6 +660,9 @@ init_hw_perf_events(void)
case 0xC090: /* Cortex-A9 */
armpmu = armv7_a9_pmu_init();
break;
+ case 0xC050: /* Cortex-A5 */
+ armpmu = armv7_a5_pmu_init();
+ break;
}
/* Intel CPUs [xscale]. */
} else if (0x69 == implementor) {
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c
index 01b1145..db1d6c4 100644
--- a/arch/arm/kernel/perf_event_v7.c
+++ b/arch/arm/kernel/perf_event_v7.c
@@ -153,6 +153,21 @@ enum armv7_a9_perf_types {
ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5
};
+/* ARMv7 Cortex-A5 specific event types */
+enum armv7_a5_perf_types {
+ ARMV7_PERFCTR_IRQ_TAKEN = 0x86,
+ ARMV7_PERFCTR_FIQ_TAKEN = 0x87,
+
+ ARMV7_PERFCTR_EXT_MEM_RQST = 0xc0,
+ ARMV7_PERFCTR_NC_EXT_MEM_RQST = 0xc1,
+ ARMV7_PERFCTR_PREFETCH_LINEFILL = 0xc2,
+ ARMV7_PERFCTR_PREFETCH_LINEFILL_DROP = 0xc3,
+ ARMV7_PERFCTR_ENTER_READ_ALLOC = 0xc4,
+ ARMV7_PERFCTR_READ_ALLOC = 0xc5,
+
+ ARMV7_PERFCTR_STALL_SB_FULL = 0xc9,
+};
+
/*
* Cortex-A8 HW events mapping
*
@@ -379,6 +394,122 @@ static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
};
/*
+ * Cortex-A5 HW events mapping
+ */
+static const unsigned armv7_a5_perf_map[PERF_COUNT_HW_MAX] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
+ [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
+ [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
+ [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
+};
+
+static const unsigned armv7_a5_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
+ [C(L1D)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)]
+ = ARMV7_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_DCACHE_REFILL,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)]
+ = ARMV7_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_DCACHE_REFILL,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)]
+ = ARMV7_PERFCTR_PREFETCH_LINEFILL,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_PREFETCH_LINEFILL_DROP,
+ },
+ },
+ [C(L1I)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
+ },
+ /*
+ * The prefetch counters don't differentiate between the I
+ * side and the D side.
+ */
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)]
+ = ARMV7_PERFCTR_PREFETCH_LINEFILL,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_PREFETCH_LINEFILL_DROP,
+ },
+ },
+ [C(LL)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(DTLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(ITLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(BPU)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+};
+
+/*
* Perf Events counters
*/
enum armv7_counters {
@@ -910,6 +1041,16 @@ static const struct arm_pmu *__init armv7_a9_pmu_init(void)
armv7pmu.num_events = armv7_read_num_pmnc_events();
return &armv7pmu;
}
+
+static const struct arm_pmu *__init armv7_a5_pmu_init(void)
+{
+ armv7pmu.id = ARM_PERF_PMU_ID_CA5;
+ armv7pmu.name = "ARMv7 Cortex-A5";
+ armv7pmu.cache_map = &armv7_a5_perf_cache_map;
+ armv7pmu.event_map = &armv7_a5_perf_map;
+ armv7pmu.num_events = armv7_read_num_pmnc_events();
+ return &armv7pmu;
+}
#else
static const struct arm_pmu *__init armv7_a8_pmu_init(void)
{
@@ -920,4 +1061,9 @@ static const struct arm_pmu *__init armv7_a9_pmu_init(void)
{
return NULL;
}
+
+static const struct arm_pmu *__init armv7_a5_pmu_init(void)
+{
+ return NULL;
+}
#endif /* CONFIG_CPU_V7 */
--
1.7.0.4
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