The information to associate Trace ID and CPU will be changing.
Drivers will start outputting this as a hardware ID packet in the data file which if present will be used in preference to the AUXINFO values.
To prepare for this we provide a helper functions to do the individual ID mapping, and one to extract the IDs from the completed metadata blocks.
Signed-off-by: Mike Leach mike.leach@linaro.org Reviewed-by: James Clark james.clark@arm.com Acked-by: Suzuki K Poulose suzuki.poulose@arm.com --- tools/include/linux/coresight-pmu.h | 5 ++ tools/perf/util/cs-etm-base.c | 3 +- tools/perf/util/cs-etm.c | 92 +++++++++++++++++++---------- tools/perf/util/cs-etm.h | 14 ++++- 4 files changed, 79 insertions(+), 35 deletions(-)
diff --git a/tools/include/linux/coresight-pmu.h b/tools/include/linux/coresight-pmu.h index 6c2fd6cc5a98..db9c7c0abb6a 100644 --- a/tools/include/linux/coresight-pmu.h +++ b/tools/include/linux/coresight-pmu.h @@ -7,9 +7,14 @@ #ifndef _LINUX_CORESIGHT_PMU_H #define _LINUX_CORESIGHT_PMU_H
+#include <linux/bits.h> + #define CORESIGHT_ETM_PMU_NAME "cs_etm" #define CORESIGHT_ETM_PMU_SEED 0x10
+/* CoreSight trace ID is currently the bottom 7 bits of the value */ +#define CORESIGHT_TRACE_ID_VAL_MASK GENMASK(6, 0) + /* * Below are the definition of bit offsets for perf option, and works as * arbitrary values for all ETM versions. diff --git a/tools/perf/util/cs-etm-base.c b/tools/perf/util/cs-etm-base.c index 5f48b756c4cf..4abe416e3feb 100644 --- a/tools/perf/util/cs-etm-base.c +++ b/tools/perf/util/cs-etm-base.c @@ -148,7 +148,8 @@ static void cs_etm__print_auxtrace_info(u64 *val, int num) for (i = CS_HEADER_VERSION_MAX; cpu < num; cpu++) { if (version == 0) err = cs_etm__print_cpu_metadata_v0(val, &i); - else if (version == 1) + /* printing same for both, but value bit flags added on v2 */ + else if ((version == 1) || (version == 2)) err = cs_etm__print_cpu_metadata_v1(val, &i); if (err) return; diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index f65bac5ddbdb..5fc9c288080b 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -196,6 +196,30 @@ int cs_etm__get_pid_fmt(u8 trace_chan_id, u64 *pid_fmt) return 0; }
+static int cs_etm__map_trace_id(u8 trace_chan_id, u64 *cpu_metadata) +{ + struct int_node *inode; + + /* Get an RB node for this CPU */ + inode = intlist__findnew(traceid_list, trace_chan_id); + + /* Something went wrong, no need to continue */ + if (!inode) + return -ENOMEM; + + /* + * The node for that CPU should not be taken. + * Back out if that's the case. + */ + if (inode->priv) + return -EINVAL; + + /* All good, associate the traceID with the metadata pointer */ + inode->priv = cpu_metadata; + + return 0; +} + void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq, u8 trace_chan_id) { @@ -2804,17 +2828,46 @@ static bool cs_etm__has_virtual_ts(u64 **metadata, int num_cpu) return true; }
+/* map trace ids to correct metadata block, from information in metadata */ +static int cs_etm__map_trace_ids_metadata(int num_cpu, u64 **metadata) +{ + u64 cs_etm_magic; + u8 trace_chan_id; + int i, err; + + for (i = 0; i < num_cpu; i++) { + cs_etm_magic = metadata[i][CS_ETM_MAGIC]; + switch (cs_etm_magic) { + case __perf_cs_etmv3_magic: + trace_chan_id = (u8)((metadata[i][CS_ETM_ETMTRACEIDR]) & + CORESIGHT_TRACE_ID_VAL_MASK); + break; + case __perf_cs_etmv4_magic: + case __perf_cs_ete_magic: + trace_chan_id = (u8)((metadata[i][CS_ETMV4_TRCTRACEIDR]) & + CORESIGHT_TRACE_ID_VAL_MASK); + break; + default: + /* unknown magic number */ + return -EINVAL; + } + err = cs_etm__map_trace_id(trace_chan_id, metadata[i]); + if (err) + return err; + } + return 0; +} + int cs_etm__process_auxtrace_info_full(union perf_event *event, struct perf_session *session) { struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info; struct cs_etm_auxtrace *etm = NULL; - struct int_node *inode; struct perf_record_time_conv *tc = &session->time_conv; int event_header_size = sizeof(struct perf_event_header); int total_size = auxtrace_info->header.size; int priv_size = 0; - int num_cpu, trcidr_idx; + int num_cpu; int err = 0; int i, j; u64 *ptr = NULL; @@ -2853,23 +2906,13 @@ int cs_etm__process_auxtrace_info_full(union perf_event *event, cs_etm__create_meta_blk(ptr, &i, CS_ETM_PRIV_MAX, CS_ETM_NR_TRC_PARAMS_V0); - - /* The traceID is our handle */ - trcidr_idx = CS_ETM_ETMTRACEIDR; - } else if (ptr[i] == __perf_cs_etmv4_magic) { metadata[j] = cs_etm__create_meta_blk(ptr, &i, CS_ETMV4_PRIV_MAX, CS_ETMV4_NR_TRC_PARAMS_V0); - - /* The traceID is our handle */ - trcidr_idx = CS_ETMV4_TRCTRACEIDR; } else if (ptr[i] == __perf_cs_ete_magic) { metadata[j] = cs_etm__create_meta_blk(ptr, &i, CS_ETE_PRIV_MAX, -1); - - /* ETE shares first part of metadata with ETMv4 */ - trcidr_idx = CS_ETMV4_TRCTRACEIDR; } else { ui__error("CS ETM Trace: Unrecognised magic number %#"PRIx64". File could be from a newer version of perf.\n", ptr[i]); @@ -2881,26 +2924,6 @@ int cs_etm__process_auxtrace_info_full(union perf_event *event, err = -ENOMEM; goto err_free_metadata; } - - /* Get an RB node for this CPU */ - inode = intlist__findnew(traceid_list, metadata[j][trcidr_idx]); - - /* Something went wrong, no need to continue */ - if (!inode) { - err = -ENOMEM; - goto err_free_metadata; - } - - /* - * The node for that CPU should not be taken. - * Back out if that's the case. - */ - if (inode->priv) { - err = -EINVAL; - goto err_free_metadata; - } - /* All good, associate the traceID with the metadata pointer */ - inode->priv = metadata[j]; }
/* @@ -2994,6 +3017,11 @@ int cs_etm__process_auxtrace_info_full(union perf_event *event, if (err) goto err_delete_thread;
+ /* before aux records are queued, need to map metadata to trace IDs */ + err = cs_etm__map_trace_ids_metadata(num_cpu, metadata); + if (err) + goto err_delete_thread; + err = cs_etm__queue_aux_records(session); if (err) goto err_delete_thread; diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h index 98a4f7113d2f..661f029322e4 100644 --- a/tools/perf/util/cs-etm.h +++ b/tools/perf/util/cs-etm.h @@ -29,13 +29,17 @@ enum { /* * Update the version for new format. * - * New version 1 format adds a param count to the per cpu metadata. + * Version 1: format adds a param count to the per cpu metadata. * This allows easy adding of new metadata parameters. * Requires that new params always added after current ones. * Also allows client reader to handle file versions that are different by * checking the number of params in the file vs the number expected. + * + * Version 2: Drivers will use PERF_RECORD_AUX_OUTPUT_HW_ID to output + * CoreSight Trace ID. ...TRACEIDR metadata will be set to legacy values + * but with addition flags. */ -#define CS_HEADER_CURRENT_VERSION 1 +#define CS_HEADER_CURRENT_VERSION 2
/* Beginning of header common to both ETMv3 and V4 */ enum { @@ -97,6 +101,12 @@ enum { CS_ETE_PRIV_MAX };
+/* + * Check for valid CoreSight trace ID. If an invalid value is present in the metadata, + * then IDs are present in the hardware ID packet in the data file. + */ +#define CS_IS_VALID_TRACE_ID(id) ((id > 0) && (id < 0x70)) + /* * ETMv3 exception encoding number: * See Embedded Trace Macrocell specification (ARM IHI 0014Q)