linux.git/tools/perf/util/cs-etm-decoder, branch v5.12

perf cs-etm: Update ARM's CoreSight hardware tracing OpenCSD library to v1.0.0

2021-01-20T17:34:20+00:00

Replace the OCSD_INSTR switch statement with an if to fix compilation
error about unhandled values and avoid this issue again in the future.

Add new OCSD_GEN_TRC_ELEM_SYNC_MARKER and OCSD_GEN_TRC_ELEM_MEMTRANS
enum values to fix unhandled value compilation error. Currently they are
ignored.

Increase the minimum version number to v1.0.0 now that new enum values
are used that are only present in this version.

Signed-off-by: James Clark 
Reviewed-by: Mathieu Poirier 
Reviewed-by: Mike Leach 
Tested-by: Mike Leach 
Cc: Alexander Shishkin 
Cc: Al Grant 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Leo Yan 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Suzuki K Poulose 
Cc: Will Deacon 
Link: https://lore.kernel.org/r/20210108142752.27872-1-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf: cs-etm: Update to build with latest opencsd version.

2020-05-05T19:35:32+00:00

OpenCSD version v0.14.0 adds in a new output element. This is represented
by a new value in the generic element type enum, which must be added to
the handling code in perf cs-etm-decoder to prevent build errors due to
build options on the perf project.

This element is not currently used by the perf decoder.

Perf build feature test updated to require a minimum of 0.14.0

Tested on Linux 5.7-rc3.

Signed-off-by: Mike Leach 
Reviewed-by: Leo Yan 
Reviewed-by: Mathieu Poirier 
Cc: Peter Zijlstra 
Cc: Suzuki Poulouse 
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lore.kernel.org/lkml/20200501143615.1180-1-mike.leach@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove util.h from where it is not needed

2019-09-20T12:19:20+00:00

Check that it is not needed and remove, fixing up some fallout for
places where it was only serving to get something else.

Cc: Adrian Hunter 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: https://lkml.kernel.org/n/tip-9h6dg6lsqe2usyqjh5rrues4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib: Adopt zalloc()/zfree() from tools/perf

2019-07-09T13:13:26+00:00

Eroding a bit more the tools/perf/util/util.h hodpodge header.

Cc: Adrian Hunter 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: https://lkml.kernel.org/n/tip-natazosyn9rwjka25tvcnyi0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Add notion of time to decoding code

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

This patch deals with timestamp packets received from the decoding
library in order to give the front end packet processing loop a handle
on the time instruction conveyed by range packets have been executed at.

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/20190524173508.29044-17-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Linking PE contextID with perf thread mechanic

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

Link contextID packets received from the decoder with the perf tool
thread mechanic so that we know the specifics of the process currently
executing.

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/20190524173508.29044-16-mathieu.poirier@linaro.org
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: Introduce the concept of trace ID queues

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

In an ideal world there is one CPU per cs_etm_queue and as such, one
trace ID per cs_etm_queue.  In the real world CoreSight topologies allow
multiple CPUs to use the same sink, which translates to multiple trace
IDs per cs_etm_queue.

To deal with this a new cs_etm_traceid_queue structure is introduced to
enclose all the information related to a single trace ID, allowing a
cs_etm_queue to handle traces generated by any number of CPUs.

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/20190524173508.29044-10-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: Refactor error path in cs_etm_decoder__new()

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

There is no point in having two different error goto statement since the
openCSD API to free a decoder handles NULL pointers.  As such function
cs_etm_decoder__free() can be called to deal with all aspect of freeing
decoder memory.

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/20190524173508.29044-7-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo