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The powerpc PMU collecting Dispatch Trace Log (DTL) entries makes use of AUX support in perf infrastructure. The PMU driver has the functionality to collect trace entries in the aux buffer. On the tools side, this data is made available as PERF_RECORD_AUXTRACE records. This record is generated by "perf record" command. To enable the creation of PERF_RECORD_AUXTRACE, add functions to initialize auxtrace records ie "auxtrace_record__init()". Fill in fields for other callbacks like info_priv_size, info_fill, free, recording options etc. Define auxtrace_type as PERF_AUXTRACE_VPA_DTL. Add header file to define vpa dtl pmu specific details. Reviewed-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Athira Rajeev <atrajeev@linux.ibm.com> Tested-by: Tejas Manhas <tejas05@linux.ibm.com> Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com> Cc: Aboorva Devarajan <aboorvad@linux.ibm.com> Cc: Aditya Bodkhe <Aditya.Bodkhe1@ibm.com> Cc: Hari Bathini <hbathini@linux.vnet.ibm.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Shrikanth Hegde <sshegde@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.