perf cs-etm: Create ETE decoder

If the magic number indicates ETE instantiate a OCSD_BUILTIN_DCD_ETE
decoder instead of OCSD_BUILTIN_DCD_ETMV4I. ETE is the new trace feature
for Armv9.

Testing performed
=================

* Old files with v0 and v1 headers for ETMv4 still open correctly
* New files with new magic number open on new versions of perf
* New files with new magic number fail to open on old versions of perf
* Decoding with the ETE decoder results in the same output as the ETMv4
decoder as long as there are no new ETE packet types

Reviewed-by: Leo Yan <[e-mail]>
Signed-off-by: James Clark <[e-mail]>
Acked-by: Suzuki Poulouse <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: John Garry <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Mathieu Poirier <[e-mail]>
Cc: Mike Leach <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Will Deacon <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Link: https //lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/util/cs-etm-decoder/cs-etm-decoder.c

···
 	config->core_prof = profile_CortexA;
 }
 
+static void cs_etm_decoder__gen_ete_config(struct cs_etm_trace_params *params,
+					   ocsd_ete_cfg *config)
+{
+	config->reg_configr = params->ete.reg_configr;
+	config->reg_traceidr = params->ete.reg_traceidr;
+	config->reg_idr0 = params->ete.reg_idr0;
+	config->reg_idr1 = params->ete.reg_idr1;
+	config->reg_idr2 = params->ete.reg_idr2;
+	config->reg_idr8 = params->ete.reg_idr8;
+	config->reg_devarch = params->ete.reg_devarch;
+	config->arch_ver = ARCH_AA64;
+	config->core_prof = profile_CortexA;
+}
+
 static void cs_etm_decoder__print_str_cb(const void *p_context,
 					 const char *msg,
 					 const int str_len)
···
 	const char *decoder_name;
 	ocsd_etmv3_cfg config_etmv3;
 	ocsd_etmv4_cfg trace_config_etmv4;
+	ocsd_ete_cfg trace_config_ete;
 	void *trace_config;
 	u8 csid;
 
···
 		cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
 		decoder_name = OCSD_BUILTIN_DCD_ETMV4I;
 		trace_config = &trace_config_etmv4;
+		break;
+	case CS_ETM_PROTO_ETE:
+		cs_etm_decoder__gen_ete_config(t_params, &trace_config_ete);
+		decoder_name = OCSD_BUILTIN_DCD_ETE;
+		trace_config = &trace_config_ete;
 		break;
 	default:
 		return -1;

tools/perf/util/cs-etm-decoder/cs-etm-decoder.h

···
 	u32 reg_traceidr;
 };
 
+struct cs_ete_trace_params {
+	u32 reg_idr0;
+	u32 reg_idr1;
+	u32 reg_idr2;
+	u32 reg_idr8;
+	u32 reg_configr;
+	u32 reg_traceidr;
+	u32 reg_devarch;
+};
+
 struct cs_etm_trace_params {
 	int protocol;
 	union {
 		struct cs_etmv3_trace_params etmv3;
 		struct cs_etmv4_trace_params etmv4;
+		struct cs_ete_trace_params ete;
 	};
 };
 
···
 	CS_ETM_PROTO_ETMV4i,
 	CS_ETM_PROTO_ETMV4d,
 	CS_ETM_PROTO_PTM,
+	CS_ETM_PROTO_ETE
 };
 
 enum cs_etm_decoder_operation {

tools/perf/util/cs-etm.c

···
 	t_params[idx].etmv4.reg_traceidr = metadata[idx][CS_ETMV4_TRCTRACEIDR];
 }
 
+static void cs_etm__set_trace_param_ete(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_ETE;
+	t_params[idx].ete.reg_idr0 = metadata[idx][CS_ETMV4_TRCIDR0];
+	t_params[idx].ete.reg_idr1 = metadata[idx][CS_ETMV4_TRCIDR1];
+	t_params[idx].ete.reg_idr2 = metadata[idx][CS_ETMV4_TRCIDR2];
+	t_params[idx].ete.reg_idr8 = metadata[idx][CS_ETMV4_TRCIDR8];
+	t_params[idx].ete.reg_configr = metadata[idx][CS_ETMV4_TRCCONFIGR];
+	t_params[idx].ete.reg_traceidr = metadata[idx][CS_ETMV4_TRCTRACEIDR];
+	t_params[idx].ete.reg_devarch = metadata[idx][CS_ETE_TRCDEVARCH];
+}
+
 static int cs_etm__init_trace_params(struct cs_etm_trace_params *t_params,
 				     struct cs_etm_auxtrace *etm,
 				     int decoders)
···
 			break;
 		case __perf_cs_etmv4_magic:
 			cs_etm__set_trace_param_etmv4(t_params, etm, i);
+			break;
+		case __perf_cs_ete_magic:
+			cs_etm__set_trace_param_ete(t_params, etm, i);
 			break;
 		default:
 			return -EINVAL;