[PATCH v2 13/14] perf arm-spe: Set sample's data source field

[Leo Yan]

The sample structure contains the field 'data_src' which is used to
tell the detailed info for data operations, e.g. this field indicates
the data operation is loading or storing, on which cache level, it's
snooping or remote accessing, etc.  At the end, the 'data_src' will be
parsed by perf memory tool to display human readable strings.

This patch is to fill the 'data_src' field in the synthesized samples
base on different types.  Now support types for Level 1 dcache miss,
Level 1 dcache hit, Last level cache miss, Last level cache access,
TLB miss, TLB hit, remote access for other socket.

Note, current perf tool can display statistics for L1/L2/L3 caches but
it doesn't support the 'last level cache'.  To fit into current
implementation, 'data_src' field uses L3 cache for last level cache.

Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>
---
 tools/perf/util/arm-spe.c | 63 +++++++++++++++++++++++++++++++++------
 1 file changed, 54 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
index 7f44ef8c89f1..142149f732b3 100644
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -264,7 +264,7 @@ arm_spe_deliver_synth_event(struct arm_spe *spe,
 }
 
 static int arm_spe__synth_mem_sample(struct arm_spe_queue *speq,
-				     u64 spe_events_id)
+				     u64 spe_events_id, u64 data_src)
 {
 	struct arm_spe *spe = speq->spe;
 	struct arm_spe_record *record = &speq->decoder->record;
@@ -277,6 +277,7 @@ static int arm_spe__synth_mem_sample(struct arm_spe_queue *speq,
 	sample.stream_id = spe_events_id;
 	sample.addr = record->addr;
 	sample.phys_addr = record->phys_addr;
+	sample.data_src = data_src;
 
 	return arm_spe_deliver_synth_event(spe, speq, event, &sample);
 }
@@ -311,21 +312,60 @@ static bool arm_spe__is_memory_event(enum arm_spe_sample_type type)
 	return false;
 }
 
+static u64 arm_spe__synth_data_source(const struct arm_spe_record *record)
+{
+	union perf_mem_data_src	data_src = { 0 };
+
+	if (record->op == ARM_SPE_LD)
+		data_src.mem_op = PERF_MEM_OP_LOAD;
+	else
+		data_src.mem_op = PERF_MEM_OP_STORE;
+
+	if (record->type & ARM_SPE_L1D_MISS) {
+		data_src.mem_lvl_num = PERF_MEM_LVLNUM_L1;
+		data_src.mem_lvl = PERF_MEM_LVL_MISS | PERF_MEM_LVL_L1;
+	} else if (record->type & ARM_SPE_L1D_ACCESS) {
+		data_src.mem_lvl_num = PERF_MEM_LVLNUM_L1;
+		data_src.mem_lvl = PERF_MEM_LVL_HIT | PERF_MEM_LVL_L1;
+	} else if (record->type & ARM_SPE_LLC_MISS) {
+		data_src.mem_lvl_num = PERF_MEM_LVLNUM_L3;
+		data_src.mem_lvl = PERF_MEM_LVL_MISS | PERF_MEM_LVL_L3;
+	} else if (record->type & ARM_SPE_LLC_ACCESS) {
+		data_src.mem_lvl_num = PERF_MEM_LVLNUM_L3;
+		data_src.mem_lvl = PERF_MEM_LVL_HIT | PERF_MEM_LVL_L3;
+	} else if (record->type & ARM_SPE_REMOTE_ACCESS) {
+		data_src.mem_lvl_num = PERF_MEM_LVLNUM_ANY_CACHE;
+		data_src.mem_lvl = PERF_MEM_LVL_HIT | PERF_MEM_LVL_REM_CCE1;
+	}
+
+	if (record->type & ARM_SPE_TLB_MISS)
+		data_src.mem_dtlb = PERF_MEM_TLB_WK | PERF_MEM_TLB_MISS;
+	else if (record->type & ARM_SPE_TLB_ACCESS)
+		data_src.mem_dtlb = PERF_MEM_TLB_WK | PERF_MEM_TLB_HIT;
+
+	return data_src.val;
+}
+
 static int arm_spe_sample(struct arm_spe_queue *speq)
 {
 	const struct arm_spe_record *record = &speq->decoder->record;
 	struct arm_spe *spe = speq->spe;
+	u64 data_src;
 	int err;
 
+	data_src = arm_spe__synth_data_source(record);
+
 	if (spe->sample_flc) {
 		if (record->type & ARM_SPE_L1D_MISS) {
-			err = arm_spe__synth_mem_sample(speq, spe->l1d_miss_id);
+			err = arm_spe__synth_mem_sample(speq, spe->l1d_miss_id,
+							data_src);
 			if (err)
 				return err;
 		}
 
 		if (record->type & ARM_SPE_L1D_ACCESS) {
-			err = arm_spe__synth_mem_sample(speq, spe->l1d_access_id);
+			err = arm_spe__synth_mem_sample(speq, spe->l1d_access_id,
+							data_src);
 			if (err)
 				return err;
 		}
@@ -333,13 +373,15 @@ static int arm_spe_sample(struct arm_spe_queue *speq)
 
 	if (spe->sample_llc) {
 		if (record->type & ARM_SPE_LLC_MISS) {
-			err = arm_spe__synth_mem_sample(speq, spe->llc_miss_id);
+			err = arm_spe__synth_mem_sample(speq, spe->llc_miss_id,
+							data_src);
 			if (err)
 				return err;
 		}
 
 		if (record->type & ARM_SPE_LLC_ACCESS) {
-			err = arm_spe__synth_mem_sample(speq, spe->llc_access_id);
+			err = arm_spe__synth_mem_sample(speq, spe->llc_access_id,
+							data_src);
 			if (err)
 				return err;
 		}
@@ -347,13 +389,15 @@ static int arm_spe_sample(struct arm_spe_queue *speq)
 
 	if (spe->sample_tlb) {
 		if (record->type & ARM_SPE_TLB_MISS) {
-			err = arm_spe__synth_mem_sample(speq, spe->tlb_miss_id);
+			err = arm_spe__synth_mem_sample(speq, spe->tlb_miss_id,
+							data_src);
 			if (err)
 				return err;
 		}
 
 		if (record->type & ARM_SPE_TLB_ACCESS) {
-			err = arm_spe__synth_mem_sample(speq, spe->tlb_access_id);
+			err = arm_spe__synth_mem_sample(speq, spe->tlb_access_id,
+							data_src);
 			if (err)
 				return err;
 		}
@@ -367,13 +411,14 @@ static int arm_spe_sample(struct arm_spe_queue *speq)
 
 	if (spe->sample_remote_access &&
 	    (record->type & ARM_SPE_REMOTE_ACCESS)) {
-		err = arm_spe__synth_mem_sample(speq, spe->remote_access_id);
+		err = arm_spe__synth_mem_sample(speq, spe->remote_access_id,
+						data_src);
 		if (err)
 			return err;
 	}
 
 	if (spe->sample_memory && arm_spe__is_memory_event(record->type)) {
-		err = arm_spe__synth_mem_sample(speq, spe->memory_id);
+		err = arm_spe__synth_mem_sample(speq, spe->memory_id, data_src);
 		if (err)
 			return err;
 	}
-- 
2.20.1