[PATCH 06/17] perf: cs-etm: Create decoders based on the trace ID mappings
James Clark
james.clark at arm.com
Mon Apr 29 08:21:51 PDT 2024
Now that each queue has a unique set of trace ID mappings, use this
list to create the decoders. This also works the same way for
unformatted where a single dummy entry is added into the trace ID list.
Previously each queue would have a decoder created for each traced CPU
on the system but this won't work anymore because CPUs can have
overlapping trace IDs.
Signed-off-by: James Clark <james.clark at arm.com>
---
tools/perf/util/cs-etm.c | 143 +++++++++++++++++++++++----------------
1 file changed, 85 insertions(+), 58 deletions(-)
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index be858aed26c4..73fc0ab2fb09 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -268,6 +268,10 @@ static int cs_etm__map_trace_id_v0(struct cs_etm_auxtrace *etm, u8 trace_chan_id
int ret;
struct cs_etm_queue *etmq = etm->queues.queue_array[i].priv;
+ /* Ignore HW_IDs on unformatted queues */
+ if (etmq->formatted_set && !etmq->formatted)
+ continue;
+
ret = cs_etm__insert_trace_id_node(etmq, trace_chan_id,
cpu_metadata);
if (ret)
@@ -673,80 +677,58 @@ static void cs_etm__packet_dump(const char *pkt_string)
}
static void cs_etm__set_trace_param_etmv3(struct cs_etm_trace_params *t_params,
- struct cs_etm_auxtrace *etm, int t_idx,
- int m_idx, u32 etmidr)
+ u64 *metadata, u32 etmidr)
{
- u64 **metadata = etm->metadata;
-
- t_params[t_idx].protocol = cs_etm__get_v7_protocol_version(etmidr);
- t_params[t_idx].etmv3.reg_ctrl = metadata[m_idx][CS_ETM_ETMCR];
- t_params[t_idx].etmv3.reg_trc_id = metadata[m_idx][CS_ETM_ETMTRACEIDR];
+ t_params->protocol = cs_etm__get_v7_protocol_version(etmidr);
+ t_params->etmv3.reg_ctrl = metadata[CS_ETM_ETMCR];
+ t_params->etmv3.reg_trc_id = metadata[CS_ETM_ETMTRACEIDR];
}
static void cs_etm__set_trace_param_etmv4(struct cs_etm_trace_params *t_params,
- struct cs_etm_auxtrace *etm, int t_idx,
- int m_idx)
+ u64 *metadata)
{
- u64 **metadata = etm->metadata;
-
- t_params[t_idx].protocol = CS_ETM_PROTO_ETMV4i;
- t_params[t_idx].etmv4.reg_idr0 = metadata[m_idx][CS_ETMV4_TRCIDR0];
- t_params[t_idx].etmv4.reg_idr1 = metadata[m_idx][CS_ETMV4_TRCIDR1];
- t_params[t_idx].etmv4.reg_idr2 = metadata[m_idx][CS_ETMV4_TRCIDR2];
- t_params[t_idx].etmv4.reg_idr8 = metadata[m_idx][CS_ETMV4_TRCIDR8];
- t_params[t_idx].etmv4.reg_configr = metadata[m_idx][CS_ETMV4_TRCCONFIGR];
- t_params[t_idx].etmv4.reg_traceidr = metadata[m_idx][CS_ETMV4_TRCTRACEIDR];
+ t_params->protocol = CS_ETM_PROTO_ETMV4i;
+ t_params->etmv4.reg_idr0 = metadata[CS_ETMV4_TRCIDR0];
+ t_params->etmv4.reg_idr1 = metadata[CS_ETMV4_TRCIDR1];
+ t_params->etmv4.reg_idr2 = metadata[CS_ETMV4_TRCIDR2];
+ t_params->etmv4.reg_idr8 = metadata[CS_ETMV4_TRCIDR8];
+ t_params->etmv4.reg_configr = metadata[CS_ETMV4_TRCCONFIGR];
+ t_params->etmv4.reg_traceidr = metadata[CS_ETMV4_TRCTRACEIDR];
}
static void cs_etm__set_trace_param_ete(struct cs_etm_trace_params *t_params,
- struct cs_etm_auxtrace *etm, int t_idx,
- int m_idx)
+ u64 *metadata)
{
- u64 **metadata = etm->metadata;
-
- t_params[t_idx].protocol = CS_ETM_PROTO_ETE;
- t_params[t_idx].ete.reg_idr0 = metadata[m_idx][CS_ETE_TRCIDR0];
- t_params[t_idx].ete.reg_idr1 = metadata[m_idx][CS_ETE_TRCIDR1];
- t_params[t_idx].ete.reg_idr2 = metadata[m_idx][CS_ETE_TRCIDR2];
- t_params[t_idx].ete.reg_idr8 = metadata[m_idx][CS_ETE_TRCIDR8];
- t_params[t_idx].ete.reg_configr = metadata[m_idx][CS_ETE_TRCCONFIGR];
- t_params[t_idx].ete.reg_traceidr = metadata[m_idx][CS_ETE_TRCTRACEIDR];
- t_params[t_idx].ete.reg_devarch = metadata[m_idx][CS_ETE_TRCDEVARCH];
+ t_params->protocol = CS_ETM_PROTO_ETE;
+ t_params->ete.reg_idr0 = metadata[CS_ETE_TRCIDR0];
+ t_params->ete.reg_idr1 = metadata[CS_ETE_TRCIDR1];
+ t_params->ete.reg_idr2 = metadata[CS_ETE_TRCIDR2];
+ t_params->ete.reg_idr8 = metadata[CS_ETE_TRCIDR8];
+ t_params->ete.reg_configr = metadata[CS_ETE_TRCCONFIGR];
+ t_params->ete.reg_traceidr = metadata[CS_ETE_TRCTRACEIDR];
+ t_params->ete.reg_devarch = metadata[CS_ETE_TRCDEVARCH];
}
static int cs_etm__init_trace_params(struct cs_etm_trace_params *t_params,
- struct cs_etm_auxtrace *etm,
- bool formatted,
- int sample_cpu,
- int decoders)
-{
- int t_idx, m_idx;
- u32 etmidr;
- u64 architecture;
-
- for (t_idx = 0; t_idx < decoders; t_idx++) {
- if (formatted)
- m_idx = t_idx;
- else {
- m_idx = get_cpu_data_idx(etm, sample_cpu);
- if (m_idx == -1) {
- pr_warning("CS_ETM: unknown CPU, falling back to first metadata\n");
- m_idx = 0;
- }
- }
+ struct cs_etm_queue *etmq)
+{
+ struct int_node *inode;
- architecture = etm->metadata[m_idx][CS_ETM_MAGIC];
+ intlist__for_each_entry(inode, etmq->traceid_list) {
+ u64 *metadata = inode->priv;
+ u64 architecture = metadata[CS_ETM_MAGIC];
+ u32 etmidr;
switch (architecture) {
case __perf_cs_etmv3_magic:
- etmidr = etm->metadata[m_idx][CS_ETM_ETMIDR];
- cs_etm__set_trace_param_etmv3(t_params, etm, t_idx, m_idx, etmidr);
+ etmidr = metadata[CS_ETM_ETMIDR];
+ cs_etm__set_trace_param_etmv3(t_params++, metadata, etmidr);
break;
case __perf_cs_etmv4_magic:
- cs_etm__set_trace_param_etmv4(t_params, etm, t_idx, m_idx);
+ cs_etm__set_trace_param_etmv4(t_params++, metadata);
break;
case __perf_cs_ete_magic:
- cs_etm__set_trace_param_ete(t_params, etm, t_idx, m_idx);
+ cs_etm__set_trace_param_ete(t_params++, metadata);
break;
default:
return -EINVAL;
@@ -2918,6 +2900,42 @@ static u64 *cs_etm__create_meta_blk(u64 *buff_in, int *buff_in_offset,
return metadata;
}
+/*
+ * traceid_list is used to create decoders and give them the trace ID
+ * mappings. In unformatted mode just insert one entry for the sample
+ * CPU so the decoder knows which settings to use.
+ */
+static int cs_etm__map_trace_ids_unformatted(struct cs_etm_auxtrace *etm)
+{
+ for (unsigned int i = 0; i < etm->queues.nr_queues; ++i) {
+ int ret;
+ struct cs_etm_queue *etmq;
+ u8 trace_chan_id;
+ u64 *cpu_data;
+
+ etmq = etm->queues.queue_array[i].priv;
+ if (!etmq->formatted_set || etmq->formatted)
+ continue;
+
+ /* Giving it a real ID doesn't do much but can help with debugging */
+ trace_chan_id = CORESIGHT_LEGACY_CPU_TRACE_ID(i);
+ cpu_data = get_cpu_data(etm, i);
+ if (cpu_data == NULL) {
+ pr_warning("CS_ETM: unknown CPU, falling back to first metadata\n");
+ cpu_data = etm->metadata[0];
+ }
+
+ ret = cs_etm__insert_trace_id_node(etmq, trace_chan_id, cpu_data);
+ if (ret)
+ return ret;
+
+ ret = cs_etm__metadata_set_trace_id(trace_chan_id, cpu_data);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
/**
* Puts a fragment of an auxtrace buffer into the auxtrace queues based
* on the bounds of aux_event, if it matches with the buffer that's at
@@ -3220,21 +3238,26 @@ static int cs_etm__clear_unused_trace_ids_metadata(int num_cpu, u64 **metadata)
static int cs_etm__create_queue_decoders(struct cs_etm_queue *etmq)
{
struct cs_etm_decoder_params d_params;
+ struct cs_etm_trace_params *t_params;
+ int decoders = intlist__nr_entries(etmq->traceid_list);
/*
* Each queue can only contain data from one CPU when unformatted, so only one decoder is
* needed.
*/
- int decoders = etmq->formatted ? etmq->etm->num_cpu : 1;
+ if (etmq->formatted_set && !etmq->formatted)
+ assert(decoders == 1);
+
+ if (decoders == 0)
+ return 0;
/* Use metadata to fill in trace parameters for trace decoder */
- struct cs_etm_trace_params *t_params = zalloc(sizeof(*t_params) * decoders);
+ t_params = zalloc(sizeof(*t_params) * decoders);
if (!t_params)
goto out_free;
- if (cs_etm__init_trace_params(t_params, etmq->etm, etmq->formatted,
- etmq->queue_nr, decoders))
+ if (cs_etm__init_trace_params(t_params, etmq))
goto out_free;
/* Set decoder parameters to decode trace packets */
@@ -3497,6 +3520,10 @@ int cs_etm__process_auxtrace_info_full(union perf_event *event,
if (err)
goto err_free_queues;
+ err = cs_etm__map_trace_ids_unformatted(etm);
+ if (err)
+ goto err_free_queues;
+
err = cs_etm__create_decoders(etm);
if (err)
goto err_free_queues;
--
2.34.1
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