diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index aac07f950074..f3a6dfaf3026 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -136,6 +136,57 @@ static void cs_etm__packet_dump(const char *pkt_string)
 	fflush(stdout);
 }
 
+static void cs_etm__set_trace_param_etmv3(struct cs_etm_trace_params *t_params,
+					  struct cs_etm_auxtrace *etm, int idx,
+					  u32 etmidr)
+{
+	u64 **metadata = etm->metadata;
+
+	t_params[idx].protocol = cs_etm__get_v7_protocol_version(etmidr);
+	t_params[idx].etmv3.reg_ctrl = metadata[idx][CS_ETM_ETMCR];
+	t_params[idx].etmv3.reg_trc_id = metadata[idx][CS_ETM_ETMTRACEIDR];
+}
+
+static void cs_etm__set_trace_param_etmv4(struct cs_etm_trace_params *t_params,
+					  struct cs_etm_auxtrace *etm, int idx)
+{
+	u64 **metadata = etm->metadata;
+
+	t_params[idx].protocol = CS_ETM_PROTO_ETMV4i;
+	t_params[idx].etmv4.reg_idr0 = metadata[idx][CS_ETMV4_TRCIDR0];
+	t_params[idx].etmv4.reg_idr1 = metadata[idx][CS_ETMV4_TRCIDR1];
+	t_params[idx].etmv4.reg_idr2 = metadata[idx][CS_ETMV4_TRCIDR2];
+	t_params[idx].etmv4.reg_idr8 = metadata[idx][CS_ETMV4_TRCIDR8];
+	t_params[idx].etmv4.reg_configr = metadata[idx][CS_ETMV4_TRCCONFIGR];
+	t_params[idx].etmv4.reg_traceidr = metadata[idx][CS_ETMV4_TRCTRACEIDR];
+}
+
+static int cs_etm__init_trace_params(struct cs_etm_trace_params *t_params,
+				     struct cs_etm_auxtrace *etm)
+{
+	int i;
+	u32 etmidr;
+	u64 architecture;
+
+	for (i = 0; i < etm->num_cpu; i++) {
+		architecture = etm->metadata[i][CS_ETM_MAGIC];
+
+		switch (architecture) {
+		case __perf_cs_etmv3_magic:
+			etmidr = etm->metadata[i][CS_ETM_ETMIDR];
+			cs_etm__set_trace_param_etmv3(t_params, etm, i, etmidr);
+			break;
+		case __perf_cs_etmv4_magic:
+			cs_etm__set_trace_param_etmv4(t_params, etm, i);
+			break;
+		default:
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
 static int cs_etm__init_decoder_params(struct cs_etm_decoder_params *d_params,
 				       struct cs_etm_queue *etmq,
 				       enum cs_etm_decoder_operation mode)
@@ -161,7 +212,7 @@ static int cs_etm__init_decoder_params(struct cs_etm_decoder_params *d_params,
 static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
 			       struct auxtrace_buffer *buffer)
 {
-	int i, ret;
+	int ret;
 	const char *color = PERF_COLOR_BLUE;
 	struct cs_etm_decoder_params d_params;
 	struct cs_etm_trace_params *t_params;
@@ -179,33 +230,8 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
 	if (!t_params)
 		return;
 
-	for (i = 0; i < etm->num_cpu; i++) {
-		if (etm->metadata[i][CS_ETM_MAGIC] == __perf_cs_etmv3_magic) {
-			u32 etmidr = etm->metadata[i][CS_ETM_ETMIDR];
-
-			t_params[i].protocol =
-					cs_etm__get_v7_protocol_version(etmidr);
-			t_params[i].etmv3.reg_ctrl =
-					etm->metadata[i][CS_ETM_ETMCR];
-			t_params[i].etmv3.reg_trc_id =
-					etm->metadata[i][CS_ETM_ETMTRACEIDR];
-		} else if (etm->metadata[i][CS_ETM_MAGIC] ==
-						      __perf_cs_etmv4_magic) {
-			t_params[i].protocol = CS_ETM_PROTO_ETMV4i;
-			t_params[i].etmv4.reg_idr0 =
-					etm->metadata[i][CS_ETMV4_TRCIDR0];
-			t_params[i].etmv4.reg_idr1 =
-					etm->metadata[i][CS_ETMV4_TRCIDR1];
-			t_params[i].etmv4.reg_idr2 =
-					etm->metadata[i][CS_ETMV4_TRCIDR2];
-			t_params[i].etmv4.reg_idr8 =
-					etm->metadata[i][CS_ETMV4_TRCIDR8];
-			t_params[i].etmv4.reg_configr =
-					etm->metadata[i][CS_ETMV4_TRCCONFIGR];
-			t_params[i].etmv4.reg_traceidr =
-					etm->metadata[i][CS_ETMV4_TRCTRACEIDR];
-		}
-	}
+	if (cs_etm__init_trace_params(t_params, etm))
+		goto out_free;
 
 	/* Set decoder parameters to simply print the trace packets */
 	if (cs_etm__init_decoder_params(&d_params, NULL,
@@ -382,7 +408,6 @@ static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u64 address,
 static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
 						unsigned int queue_nr)
 {
-	int i;
 	struct cs_etm_decoder_params d_params;
 	struct cs_etm_trace_params  *t_params = NULL;
 	struct cs_etm_queue *etmq;
@@ -431,33 +456,8 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
 	if (!t_params)
 		goto out_free;
 
-	for (i = 0; i < etm->num_cpu; i++) {
-		if (etm->metadata[i][CS_ETM_MAGIC] == __perf_cs_etmv3_magic) {
-			u32 etmidr = etm->metadata[i][CS_ETM_ETMIDR];
-
-			t_params[i].protocol =
-					cs_etm__get_v7_protocol_version(etmidr);
-			t_params[i].etmv3.reg_ctrl =
-					etm->metadata[i][CS_ETM_ETMCR];
-			t_params[i].etmv3.reg_trc_id =
-					etm->metadata[i][CS_ETM_ETMTRACEIDR];
-		} else if (etm->metadata[i][CS_ETM_MAGIC] ==
-							__perf_cs_etmv4_magic) {
-			t_params[i].protocol = CS_ETM_PROTO_ETMV4i;
-			t_params[i].etmv4.reg_idr0 =
-					etm->metadata[i][CS_ETMV4_TRCIDR0];
-			t_params[i].etmv4.reg_idr1 =
-					etm->metadata[i][CS_ETMV4_TRCIDR1];
-			t_params[i].etmv4.reg_idr2 =
-					etm->metadata[i][CS_ETMV4_TRCIDR2];
-			t_params[i].etmv4.reg_idr8 =
-					etm->metadata[i][CS_ETMV4_TRCIDR8];
-			t_params[i].etmv4.reg_configr =
-					etm->metadata[i][CS_ETMV4_TRCCONFIGR];
-			t_params[i].etmv4.reg_traceidr =
-					etm->metadata[i][CS_ETMV4_TRCTRACEIDR];
-		}
-	}
+	if (cs_etm__init_trace_params(t_params, etm))
+		goto out_free;
 
 	/* Set decoder parameters to simply print the trace packets */
 	if (cs_etm__init_decoder_params(&d_params, etmq,
diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h
index d76126e0e3d0..0e97c196147a 100644
--- a/tools/perf/util/cs-etm.h
+++ b/tools/perf/util/cs-etm.h
@@ -105,8 +105,8 @@ struct intlist *traceid_list;
 
 #define CS_ETM_HEADER_SIZE (CS_HEADER_VERSION_0_MAX * sizeof(u64))
 
-static const u64 __perf_cs_etmv3_magic   = 0x3030303030303030ULL;
-static const u64 __perf_cs_etmv4_magic   = 0x4040404040404040ULL;
+#define __perf_cs_etmv3_magic 0x3030303030303030ULL
+#define __perf_cs_etmv4_magic 0x4040404040404040ULL
 #define CS_ETMV3_PRIV_SIZE (CS_ETM_PRIV_MAX * sizeof(u64))
 #define CS_ETMV4_PRIV_SIZE (CS_ETMV4_PRIV_MAX * sizeof(u64))
 
