[PATCH 5/6] perf cs-etm: Create ETE decoder
From: James Clark
Date: Wed Jul 21 2021 - 05:17:49 EST
If the TRCDEVARCH register was saved, and it shows that ETE is present,
then instantiate an 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 headers still open correctly
* Old files with v1 headers with no TRCDEVARCH saved still open
* New files with TRCDEVARCH open using an old version of perf that
supports v1 headers
* Coresight decoding results in the same output if there are no new ETE
packet types
Signed-off-by: James Clark <james.clark@xxxxxxx>
---
.../perf/util/cs-etm-decoder/cs-etm-decoder.c | 29 ++++++++++-
.../perf/util/cs-etm-decoder/cs-etm-decoder.h | 7 +++
tools/perf/util/cs-etm.c | 49 ++++++++++++++++++-
tools/perf/util/cs-etm.h | 1 +
4 files changed, 82 insertions(+), 4 deletions(-)
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 60147c908425..37bc9d6a7677 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
@@ -127,8 +127,12 @@ static int cs_etm_decoder__gen_etmv3_config(struct cs_etm_trace_params *params,
#define TRCIDR1_TRCARCHMIN_SHIFT 4
#define TRCIDR1_TRCARCHMIN_MASK GENMASK(7, 4)
#define TRCIDR1_TRCARCHMIN(x) (((x) & TRCIDR1_TRCARCHMIN_MASK) >> TRCIDR1_TRCARCHMIN_SHIFT)
-static enum _ocsd_arch_version cs_etm_decoder__get_arch_ver(u32 reg_idr1)
+static enum _ocsd_arch_version cs_etm_decoder__get_arch_ver(u32 reg_idr1, u32 reg_devarch)
{
+ /* ETE has to be v9 so set arch version to v8.3+ (ARCH__AA64) */
+ if (cs_etm__is_ete(reg_devarch))
+ return ARCH_AA64;
+
/*
* If the ETM trace minor version is 4 or more then we can assume
* the architecture is ARCH_AA64 rather than just V8
@@ -150,7 +154,22 @@ static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params,
config->reg_idr11 = 0;
config->reg_idr12 = 0;
config->reg_idr13 = 0;
- config->arch_ver = cs_etm_decoder__get_arch_ver(params->etmv4.reg_idr1);
+ config->arch_ver = cs_etm_decoder__get_arch_ver(params->etmv4.reg_idr1, 0);
+ 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.base_params.reg_configr;
+ config->reg_traceidr = params->ete.base_params.reg_traceidr;
+ config->reg_idr0 = params->ete.base_params.reg_idr0;
+ config->reg_idr1 = params->ete.base_params.reg_idr1;
+ config->reg_idr2 = params->ete.base_params.reg_idr2;
+ config->reg_idr8 = params->ete.base_params.reg_idr8;
+ config->reg_devarch = params->ete.reg_devarch;
+ config->arch_ver = cs_etm_decoder__get_arch_ver(params->ete.base_params.reg_idr1,
+ params->ete.reg_devarch);
config->core_prof = profile_CortexA;
}
@@ -598,6 +617,7 @@ cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
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;
@@ -615,6 +635,11 @@ cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
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;
}
diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h
index 11f3391d06f2..9137796fe3c5 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h
@@ -37,11 +37,17 @@ struct cs_etmv4_trace_params {
u32 reg_traceidr;
};
+struct cs_ete_trace_params {
+ struct cs_etmv4_trace_params base_params;
+ 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;
};
};
@@ -65,6 +71,7 @@ enum {
CS_ETM_PROTO_ETMV4i,
CS_ETM_PROTO_ETMV4d,
CS_ETM_PROTO_PTM,
+ CS_ETM_PROTO_ETE
};
enum cs_etm_decoder_operation {
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 68978f6707a8..870073bce670 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -460,11 +460,44 @@ static void cs_etm__set_trace_param_etmv4(struct cs_etm_trace_params *t_params,
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.base_params.reg_idr0 = metadata[idx][CS_ETMV4_TRCIDR0];
+ t_params[idx].ete.base_params.reg_idr1 = metadata[idx][CS_ETMV4_TRCIDR1];
+ t_params[idx].ete.base_params.reg_idr2 = metadata[idx][CS_ETMV4_TRCIDR2];
+ t_params[idx].ete.base_params.reg_idr8 = metadata[idx][CS_ETMV4_TRCIDR8];
+ t_params[idx].ete.base_params.reg_configr = metadata[idx][CS_ETMV4_TRCCONFIGR];
+ t_params[idx].ete.base_params.reg_traceidr = metadata[idx][CS_ETMV4_TRCTRACEIDR];
+ t_params[idx].ete.reg_devarch = metadata[idx][CS_ETE_TRCDEVARCH];
+}
+
+#define TRCDEVARCH_ARCHPART_SHIFT 0
+#define TRCDEVARCH_ARCHPART_MASK GENMASK(11, 0)
+#define TRCDEVARCH_ARCHPART(x) (((x) & TRCDEVARCH_ARCHPART_MASK) >> TRCDEVARCH_ARCHPART_SHIFT)
+
+#define TRCDEVARCH_ARCHVER_SHIFT 12
+#define TRCDEVARCH_ARCHVER_MASK GENMASK(15, 12)
+#define TRCDEVARCH_ARCHVER(x) (((x) & TRCDEVARCH_ARCHVER_MASK) >> TRCDEVARCH_ARCHVER_SHIFT)
+
+bool cs_etm__is_ete(u32 trcdevarch)
+{
+ /*
+ * ETE if ARCHVER is 5 (ARCHVER is 4 for ETM) and ARCHPART is 0xA13.
+ * See ETM_DEVARCH_ETE_ARCH in coresight-etm4x.h
+ */
+ return TRCDEVARCH_ARCHVER(trcdevarch) == 5 && TRCDEVARCH_ARCHPART(trcdevarch) == 0xA13;
+}
+
+
static int cs_etm__init_trace_params(struct cs_etm_trace_params *t_params,
struct cs_etm_auxtrace *etm,
int decoders_per_cpu)
{
- int i;
+ int i, num_params;
u32 etmidr;
u64 architecture;
@@ -477,7 +510,19 @@ static int cs_etm__init_trace_params(struct cs_etm_trace_params *t_params,
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);
+ /*
+ * If devarch was saved and shows ETE, initialise ETE decoder. Otherwise
+ * ETM decoder will still be able to decode a subset of the data. The total
+ * number of params is number of params saved + common block size for v1,
+ * see cs_etm_get_metadata().
+ */
+ num_params = etm->metadata[i][CS_ETM_NR_TRC_PARAMS] +
+ CS_ETM_COMMON_BLK_MAX_V1;
+ if (num_params > CS_ETE_TRCDEVARCH &&
+ cs_etm__is_ete(etm->metadata[i][CS_ETE_TRCDEVARCH]))
+ cs_etm__set_trace_param_ete(t_params, etm, i);
+ else
+ cs_etm__set_trace_param_etmv4(t_params, etm, i);
break;
default:
return -EINVAL;
diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h
index 52d82dce9d59..514083819657 100644
--- a/tools/perf/util/cs-etm.h
+++ b/tools/perf/util/cs-etm.h
@@ -203,6 +203,7 @@ void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq,
u8 trace_chan_id);
struct cs_etm_packet_queue
*cs_etm__etmq_get_packet_queue(struct cs_etm_queue *etmq, u8 trace_chan_id);
+bool cs_etm__is_ete(u32 trcdevarch);
#else
static inline int
cs_etm__process_auxtrace_info(union perf_event *event __maybe_unused,
--
2.28.0