linux.git/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h, branch vsnprintf

perf: cs-etm: Print queue number in raw trace dump

2024-08-29T18:56:37+00:00

Now that we have overlapping trace IDs it's also useful to know what the
queue number is to be able to distinguish the source of the trace so
print it inline. Hide it behind the -v option because it might not be
obvious to users what the queue number is.

Reviewed-by: Mike Leach 
Signed-off-by: James Clark 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Alexandre Torgue 
Cc: Anshuman Khandual 
Cc: Ganapatrao Kulkarni 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Kan Liang 
Cc: Leo Yan 
Cc: Mark Rutland 
Cc: Maxime Coquelin 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Suzuki Poulouse 
Cc: Will Deacon 
Link: https://lore.kernel.org/r/20240722101202.26915-8-james.clark@linaro.org
Signed-off-by: James Clark 
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Add exception level consistency check

2023-06-12T21:18:13+00:00

Assert that our own tracking of the exception level matches what
OpenCSD provides. OpenCSD doesn't distinguish between EL0 and EL1 in the
memory access callback so the extra tracking was required. But a rough
assert can still be done.

Signed-off-by: James Clark 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Leo Yan 
Cc: Mark Rutland 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Suzuki Poulouse 
Cc: Will Deacon 
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230612111403.100613-6-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Use bool type for boolean values

2023-04-24T17:42:20+00:00

Using u8 for boolean values makes the code a bit more difficult to read
so be more explicit by using bool.

Signed-off-by: James Clark 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Denis Nikitin 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Leo Yan 
Cc: Mark Rutland 
Cc: Mathieu Poirier 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Suzuki Poulouse 
Cc: Will Deacon 
Cc: Yang Shi 
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230424134748.228137-7-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Print the decoder name

2021-09-03T11:17:25+00:00

Use the real name of the decoder instead of hard-coding "ETM" to avoid
confusion when the trace is ETE. This also now distinguishes between
ETMv3 and ETMv4.

Reviewed-by: Leo Yan 
Reviewed-by: Suzuki Poulouse 
Signed-off-by: James Clark 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Mark Rutland 
Cc: Mathieu Poirier 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Will Deacon 
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https //lore.kernel.org/r/20210806134109.1182235-9-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Create ETE decoder

2021-09-03T11:16:36+00:00

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 
Signed-off-by: James Clark 
Acked-by: Suzuki Poulouse 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Mark Rutland 
Cc: Mathieu Poirier 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Will Deacon 
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https //lore.kernel.org/r/20210806134109.1182235-8-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Use traceID aware memory callback API

2019-06-10T18:50:02+00:00

When working with CPU-wide traces different traceID may be found in the
same stream.  As such we need to use the decoder callback that provides
the traceID in order to know the thread context being decoded.

Signed-off-by: Mathieu Poirier 
Tested-by: Leo Yan 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Suzuki Poulouse 
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190524173508.29044-14-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Move packet queue out of decoder structure

2019-06-10T18:50:01+00:00

The decoder needs to work with more than one traceID queue if we want to
support CPU-wide scenarios with N:1 source/sink topologies.  As such
move the packet buffer and related fields out of the decoder structure
and into the cs_etm_queue structure.

Signed-off-by: Mathieu Poirier 
Tested-by: Leo Yan 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Suzuki Poulouse 
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190524173508.29044-8-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Make cs_etm__run_decoder() queue independent

2019-02-14T18:18:07+00:00

This patch makes decoding of auxtrace buffer centered around a struct
cs_etm_queue.  This eliminates surperflous variables and is a precursor
for work that simplifies the main decoder loop.

Signed-off-by: Mathieu Poirier 
Cc: Jiri Olsa 
Cc: Leo Yan 
Cc: Peter Zijlstra 
Cc: Suzuki K Poulouse 
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190212171618.25355-11-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Introducing function cs_etm_decoder__init_dparams()

2019-02-14T18:18:06+00:00

Introducing function cs_etm_decoder__init_dparams() to avoid repeating
code at two different places.

Signed-off-by: Mathieu Poirier 
Cc: Jiri Olsa 
Cc: Leo Yan 
Cc: Peter Zijlstra 
Cc: Suzuki K Poulouse 
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190212171618.25355-5-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Add traceID in packet

2019-02-06T13:00:40+00:00

Add traceID in packet, thus we can use traceID to retrieve metadata
pointer from traceID-metadata tuple.

Signed-off-by: Leo Yan 
Reviewed-by: Mathieu Poirier 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Robert Walker 
Cc: Suzuki K Poulouse 
Cc: coresight ml 
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190129122842.32041-7-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo