[PATCH v5 12/14] perf arm_spe: Refactor arm_spe__get_metadata_by_cpu()

[Leo Yan]

Handle "CPU=-1" (per-thread mode) in the arm_spe__get_metadata_by_cpu()
function. As a result, the function is more general and will be invoked
by a sequential change.

Reviewed-by: James Clark <james.clark at linaro.org>
Signed-off-by: Leo Yan <leo.yan at arm.com>
---
 tools/perf/util/arm-spe.c | 34 ++++++++++++++++------------------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
index c5fd62534e0362dd69c69f6e836cef6f67b0d060..58f80b5c0ab969448c962adb31abde5067cf4be3 100644
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -315,15 +315,28 @@ static int arm_spe_set_tid(struct arm_spe_queue *speq, pid_t tid)
 	return 0;
 }
 
-static u64 *arm_spe__get_metadata_by_cpu(struct arm_spe *spe, u64 cpu)
+static u64 *arm_spe__get_metadata_by_cpu(struct arm_spe *spe, int cpu)
 {
 	u64 i;
 
 	if (!spe->metadata)
 		return NULL;
 
+	/* CPU ID is -1 for per-thread mode */
+	if (cpu < 0) {
+		/*
+		 * On the heterogeneous system, due to CPU ID is -1,
+		 * cannot confirm the data source packet is supported.
+		 */
+		if (!spe->is_homogeneous)
+			return NULL;
+
+		/* In homogeneous system, simply use CPU0's metadata */
+		return spe->metadata[0];
+	}
+
 	for (i = 0; i < spe->metadata_nr_cpu; i++)
-		if (spe->metadata[i][ARM_SPE_CPU] == cpu)
+		if (spe->metadata[i][ARM_SPE_CPU] == (u64)cpu)
 			return spe->metadata[i];
 
 	return NULL;
@@ -915,22 +928,7 @@ static bool arm_spe__synth_ds(struct arm_spe_queue *speq,
 		cpuid = perf_env__cpuid(perf_session__env(spe->session));
 		midr = strtol(cpuid, NULL, 16);
 	} else {
-		/* CPU ID is -1 for per-thread mode */
-		if (speq->cpu < 0) {
-			/*
-			 * On the heterogeneous system, due to CPU ID is -1,
-			 * cannot confirm the data source packet is supported.
-			 */
-			if (!spe->is_homogeneous)
-				return false;
-
-			/* In homogeneous system, simply use CPU0's metadata */
-			if (spe->metadata)
-				metadata = spe->metadata[0];
-		} else {
-			metadata = arm_spe__get_metadata_by_cpu(spe, speq->cpu);
-		}
-
+		metadata = arm_spe__get_metadata_by_cpu(spe, speq->cpu);
 		if (!metadata)
 			return false;
 

-- 
2.34.1