RE: Linux coresight arm64 : Incorrect data in cstrace.bin

["Pandey, Radhey Shyam" <radhey.shyam.pandey@amd.com>]

> -----Original Message-----
> From: Suzuki K Poulose <suzuki.poulose@arm.com>
> Sent: Wednesday, July 5, 2023 3:49 PM
> To: Pandey, Radhey Shyam <radhey.shyam.pandey@amd.com>;
> mathieu.poirier@linaro.org; mike.leach@linaro.org; leo.yan@linaro.org;
> alexander.shishkin@linux.intel.com
> Cc: coresight@lists.linaro.org; linux-arm-kernel@lists.infradead.org
> Subject: Re: Linux coresight arm64 : Incorrect data in cstrace.bin
> 
> On 05/07/2023 10:56, Pandey, Radhey Shyam wrote:
> >> -----Original Message-----
> >> From: Suzuki K Poulose <suzuki.poulose@arm.com>
> >> Sent: Wednesday, July 5, 2023 1:57 PM
> >> To: Pandey, Radhey Shyam <radhey.shyam.pandey@amd.com>;
> >> mathieu.poirier@linaro.org; mike.leach@linaro.org;
> >> leo.yan@linaro.org; alexander.shishkin@linux.intel.com
> >> Cc: coresight@lists.linaro.org; linux-arm-kernel@lists.infradead.org
> >> Subject: Re: Linux coresight arm64 : Incorrect data in cstrace.bin
> >>
> >> Hi Radhe Shyam
> >>
> >> On 05/07/2023 05:38, Pandey, Radhey Shyam wrote:
> >>> Hi,
> >>>
> >>> I am using linux 6.1 kernel coresight framework to capture ETM trace.
> >>> Enabled coresight driver and added coresight component device node
> >>> in DTS. With that, we could probe all coresight components.
> >>>
> >>> But when we do capture using sysfs and then read the trace.bin using
> >>> ptm2human we see invalid trace data.  Trace content changes on each
> >>> capture. Any pointers to help narrow down the issue?
> >>>
> >>> Tried: sysfs capture and perf (with OpenCSD enabled)
> >>>
> >>> Development board: VCK190 :
> >>>    https://docs.xilinx.com/r/en-US/ug1366-vck190-eval-bd
> >>> https://www.xilinx.com/support/documents/architecture-
> >> manuals/am011-ve
> >>> rsal-acap-trm.pdf
> >>>
> >>> xilinx-vck190-20231:/home/petalinux# dmesg | grep -i amba
> >>> [    0.301054] Serial: AMBA PL011 UART driver
> >>> [    0.306226] amba f0c20000.funnel: Fixing up cyclic dependency with
> >> f0d70000.etm
> >>> [    0.313624] amba f0c20000.funnel: Fixing up cyclic dependency with
> >> f0d30000.etm
> >>> [    0.321110] amba f0c30000.etf: Fixing up cyclic dependency with
> >> f0c20000.funnel
> >>> [    1.470247] Serial: AMBA driver
> >>> xilinx-vck190-20231:/home/petalinux# dmesg | grep -i coresight
> >>> [    1.865006]  cs_system_cfg: CoreSight Configuration manager initialised
> >>> [    1.876858] coresight etm0: CPU0: etm v4.0 initialized
> >>> [    1.885666] coresight etm1: CPU1: etm v4.0 initialized
> >>> [    1.894435] coresight-cpu-debug f0d00000.debug1: Coresight debug-
> CPU0
> >> initialized
> >>> [    1.902072] coresight-cpu-debug f0d40000.debug1: Coresight debug-
> CPU1
> >> initialized
> >>>
> >>> xilinx-vck190-20231:/home/petalinux# ls /sys/bus/coresight/devices/
> >>> etm0      etm1      funnel0   tmc_etf0
> >>>
> >>>    cd /sys/bus/coresight/devices/
> >>> echo 1 > tmc_etf0/enable_sink
> >>> echo 1 > etm0/enable_source
> >>> echo 0 > etm0/enable_source
> >>> echo 0 > tmc_etf0/enable_sink
> >>> cd /root/ dd if=/dev/tmc_etf0 of=cstrace_28Jun.bin
> >>>
> >>> ./ptm2human/ptm2human -e -i cstrace.bin -d
> >>
> >> Please note that ptm2human is for PTM trace decoding and
> >> ETMv4 uses a different format and thus is not compatible.
> >>
> >>>
> >>> I also tried OpenCSD integration with PERF.
> >>
> >> Have you made sure the perf is "linked" to the opencsd ?
> >
> > Earlier I statically linked but after adding CORESIGHT=1.
> >
> >
> > linux-xlnx$ make ARCH=arm64 NO_LIBELF=1 NO_JVMTI=1 VF=1
> CORESIGHT=1 -C
> > tools/perf/
> > make: Entering directory 'linux-xlnx/tools/perf'
> >    BUILD:   Doing 'make -j24' parallel build
> >
> > Makefile.config:520: *** Error: No libopencsd library found or the version
> is not up-to-date.
> > Please install recent libopencsd to build with CORESIGHT=1.  Stop.
> >
> >
> > echo $CSINCLUDES
> > /scratch/development/coresight/my-opencsd/decoder/include
> > radheys@xhdradheys41:/scratch/development/linux-xlnx$ ls
> > /scratch/development/coresight/my-opencsd/decoder/include
> > common  i_dec  interfaces  mem_acc  opencsd  opencsd.h  pkt_printers
> >
> > echo $CSLIBS
> > /scratch/development/coresight/my-opencsd/decoder/lib/builddir
> > radheys@xhdradheys41:/scratch/development/linux-xlnx$ ls
> /scratch/development/coresight/my-opencsd/decoder/lib/builddir
> > libopencsd.a        libopencsd_c_api.so    libopencsd_c_api.so.1.4.0
> libopencsd.so.1
> > libopencsd_c_api.a  libopencsd_c_api.so.1  libopencsd.so
> libopencsd.so.1.4.0
> >
> > Anything I am missing to fix this opencsd lib not found?
> 
> Have you checked the libopencsd version ? It looks it must be able to pick up
> the path for lib/headers.

I cloned https://github.com/Linaro/OpenCSD and version is 1.4.0

Here I am cross-compiling OpenCSD and perf for ARCH64 platform.

I set CSLIBS and CSINCLUDES to point to cross-compiled OpenCSD libs/headers.
Then cross-compile kernel perf application.

export CSLIBS=/scratch/development/coresight/OpenCSD/decoder/lib/builddir
export CSINCLUDES=/scratch/development/coresight/OpenCSD/decoder/include/
export LD_LIBRARY_PATH=$CSLIBS
make NO_LIBELF=1 NO_JVMTI=1 VF=1 CORESIGHT=1 DEBUG=1 -C tools/perf/

Makefile.config:520: *** Error: No libopencsd library found or the version is not up-to-date. 
Please install recent libopencsd to build with CORESIGHT=1.  Stop.


> 
> Suzuki

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