[tip:perf/core] perf cs-etm: Add support for ETMv3 trace decoding

[tip-bot for Mathieu Poirier]

Commit-ID:  7d0f4fefc492498a180da8fd5c9ebe11dc768c83
Gitweb:     https://git.kernel.org/tip/7d0f4fefc492498a180da8fd5c9ebe11dc768c83
Author:     Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
AuthorDate: Tue, 4 Dec 2018 13:39:03 -0700
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 17 Dec 2018 14:58:59 -0300

perf cs-etm: Add support for ETMv3 trace decoding

Add support for the creation of packet printer and decoder for the ETMv3
trace architecture.  That way traces generated by tracers adhering to
that trace protocol can be handled properly by the perf infrastructure.

Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: coresight@xxxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1543955944-10042-3-git-send-email-mathieu.poirier@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
index 5efb616bd609..952d1f43f3fa 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
@@ -116,6 +116,19 @@ int cs_etm_decoder__get_packet(struct cs_etm_decoder *decoder,
 	return 1;
 }
 
+static int cs_etm_decoder__gen_etmv3_config(struct cs_etm_trace_params *params,
+					    ocsd_etmv3_cfg *config)
+{
+	config->reg_idr = params->etmv3.reg_idr;
+	config->reg_ctrl = params->etmv3.reg_ctrl;
+	config->reg_ccer = params->etmv3.reg_ccer;
+	config->reg_trc_id = params->etmv3.reg_trc_id;
+	config->arch_ver = ARCH_V7;
+	config->core_prof = profile_CortexA;
+
+	return 0;
+}
+
 static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params,
 					     ocsd_etmv4_cfg *config)
 {
@@ -237,10 +250,16 @@ cs_etm_decoder__create_etm_packet_printer(struct cs_etm_trace_params *t_params,
 					  struct cs_etm_decoder *decoder)
 {
 	const char *decoder_name;
+	ocsd_etmv3_cfg config_etmv3;
 	ocsd_etmv4_cfg trace_config_etmv4;
 	void *trace_config;
 
 	switch (t_params->protocol) {
+	case CS_ETM_PROTO_ETMV3:
+		cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3);
+		decoder_name = OCSD_BUILTIN_DCD_ETMV3;
+		trace_config = &config_etmv3;
+		break;
 	case CS_ETM_PROTO_ETMV4i:
 		cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
 		decoder_name = OCSD_BUILTIN_DCD_ETMV4I;
@@ -427,11 +446,17 @@ static int cs_etm_decoder__create_etm_packet_decoder(
 					struct cs_etm_decoder *decoder)
 {
 	const char *decoder_name;
+	ocsd_etmv3_cfg config_etmv3;
 	ocsd_etmv4_cfg trace_config_etmv4;
 	void *trace_config;
 	u8 csid;
 
 	switch (t_params->protocol) {
+	case CS_ETM_PROTO_ETMV3:
+		cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3);
+		decoder_name = OCSD_BUILTIN_DCD_ETMV3;
+		trace_config = &config_etmv3;
+		break;
 	case CS_ETM_PROTO_ETMV4i:
 		cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
 		decoder_name = OCSD_BUILTIN_DCD_ETMV4I;