perf arm-spe: Prepare for adding data source packet implementations for other cores

Split Data Source Packet handling to prepare adding support for
other implementations.

Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Graham Woodward <graham.woodward@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20241108202946.16835-2-ilkka@os.amperecomputing.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Author: ilkka-koskinen

tools/perf/util/arm-spe.c

@@ -103,6 +103,18 @@ struct arm_spe_queue {
 	u32				flags;
 };
 
+struct data_source_handle {
+	const struct midr_range *midr_ranges;
+	void (*ds_synth)(const struct arm_spe_record *record,
+			 union perf_mem_data_src *data_src);
+};
+
+#define DS(range, func)					\
+	{						\
+		.midr_ranges = range,			\
+		.ds_synth = arm_spe__synth_##func,	\
+	}
+
 static void arm_spe_dump(struct arm_spe *spe __maybe_unused,
 			 unsigned char *buf, size_t len)
 {
@@ -532,6 +544,10 @@ static void arm_spe__synth_data_source_common(const struct arm_spe_record *recor
 	}
 }
 
+static const struct data_source_handle data_source_handles[] = {
+	DS(common_ds_encoding_cpus, data_source_common),
+};
+
 static void arm_spe__synth_memory_level(const struct arm_spe_record *record,
 					union perf_mem_data_src *data_src)
 {
@@ -555,12 +571,14 @@ static void arm_spe__synth_memory_level(const struct arm_spe_record *record,
 		data_src->mem_lvl |= PERF_MEM_LVL_REM_CCE1;
 }
 
-static bool arm_spe__is_common_ds_encoding(struct arm_spe_queue *speq)
+static bool arm_spe__synth_ds(struct arm_spe_queue *speq,
+			      const struct arm_spe_record *record,
+			      union perf_mem_data_src *data_src)
 {
 	struct arm_spe *spe = speq->spe;
-	bool is_in_cpu_list;
 	u64 *metadata = NULL;
-	u64 midr = 0;
+	u64 midr;
+	unsigned int i;
 
 	/* Metadata version 1 assumes all CPUs are the same (old behavior) */
 	if (spe->metadata_ver == 1) {
@@ -592,18 +610,20 @@ static bool arm_spe__is_common_ds_encoding(struct arm_spe_queue *speq)
 		midr = metadata[ARM_SPE_CPU_MIDR];
 	}
 
-	is_in_cpu_list = is_midr_in_range_list(midr, common_ds_encoding_cpus);
-	if (is_in_cpu_list)
-		return true;
-	else
-		return false;
+	for (i = 0; i < ARRAY_SIZE(data_source_handles); i++) {
+		if (is_midr_in_range_list(midr, data_source_handles[i].midr_ranges)) {
+			data_source_handles[i].ds_synth(record, data_src);
+			return true;
+		}
+	}
+
+	return false;
 }
 
 static u64 arm_spe__synth_data_source(struct arm_spe_queue *speq,
 				      const struct arm_spe_record *record)
 {
 	union perf_mem_data_src	data_src = { .mem_op = PERF_MEM_OP_NA };
-	bool is_common = arm_spe__is_common_ds_encoding(speq);
 
 	if (record->op & ARM_SPE_OP_LD)
 		data_src.mem_op = PERF_MEM_OP_LOAD;
@@ -612,9 +632,7 @@ static u64 arm_spe__synth_data_source(struct arm_spe_queue *speq,
 	else
 		return 0;
 
-	if (is_common)
-		arm_spe__synth_data_source_common(record, &data_src);
-	else
+	if (!arm_spe__synth_ds(speq, record, &data_src))
 		arm_spe__synth_memory_level(record, &data_src);
 
 	if (record->type & (ARM_SPE_TLB_ACCESS | ARM_SPE_TLB_MISS)) {