To record an AUX area, the weak function auxtrace_record__init() must be
implemented.

Equally to decode an AUX area, the AUX area tracing type must be added
to the perf_event__process_auxtrace_info() function.

This patch makes those two changes plus hooks up default config for the
intel_pt PMU.  Also some brief documentation is provided for using the
tools with intel_pt.

Commiter note:

E.g:

  [root@perf4 ~]# dmesg
  451 [0.405807] Performance Events: PEBS fmt2+, 16-deep LBR, Broadwell events, full-width counters, Intel PMU driver.
  [root@perf4 ~]# perf --version
  perf version 4.1.g53874a
  [root@perf4 ~]#  perf record -e intel_pt//u -a sleep 10
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.383 MB perf.data ]
  [root@perf4 ~]# perf evlist
  intel_pt//u
  sched:sched_switch
  dummy:u
  [root@perf4 ~]# perf report --stdio
  # To display the perf.data header info, please use --header/--header-only options.
  #
  #
  # Total Lost Samples: 0
  #
  # Samples: 0  of event 'intel_pt//u'
  # Event count (approx.): 0
  #
  # Overhead  Command  Shared Object  Symbol
  # ........  .......  .............  ......
  #

  # Samples: 393  of event 'sched:sched_switch'
  # Event count (approx.): 393
  #
  # Overhead  Command         Shared Object     Symbol
  # ........  ..............  ................  ..............
    49.62%  swapper         [kernel.vmlinux]  [k] __schedule
    10.69%  rcu_sched       [kernel.vmlinux]  [k] __schedule
     6.62%  rcuos/0         [kernel.vmlinux]  [k] __schedule
     5.60%  kworker/0:1     [kernel.vmlinux]  [k] __schedule
     3.56%  rcuos/3         [kernel.vmlinux]  [k] __schedule
     3.05%  kworker/u384:2  [kernel.vmlinux]  [k] __schedule
     2.54%  kworker/2:0     [kernel.vmlinux]  [k] __schedule
     2.54%  tuned           [kernel.vmlinux]  [k] __schedule
  <SNIP>
  # Samples: 0  of event 'dummy:u'
  # Event count (approx.): 0
  #
  # Overhead  Command  Shared Object  Symbol
  # ........  .......  .............  ......

  # Samples: 28  of event 'instructions:u'
  # Event count (approx.): 5030172
  #
  # Overhead  Command     Shared Object        Symbol
  # ........  ..........  ...................  ................................
  #
    21.43%  tuned       libpython2.7.so.1.0  [.] PyEval_EvalFrameEx
                 |
                 ---PyEval_EvalFrameEx
                    |
                    |--83.33%-- PyEval_EvalCodeEx
                    |          PyEval_EvalFrameEx
                    |          |
                    |          |--60.00%-- PyEval_EvalCodeEx
                    |          |          PyEval_EvalFrameEx
                    |          |          PyEval_EvalFrameEx
                    |          |
                    |           --40.00%-- PyEval_EvalFrameEx
                    |
                     --16.67%-- PyEval_EvalFrameEx
                               PyEval_EvalCodeEx
                               PyEval_EvalFrameEx
                               PyEval_EvalCodeEx
                               PyEval_EvalFrameEx
                               PyEval_EvalFrameEx

    14.29%  tuned       libpython2.7.so.1.0  [.] _PyType_Lookup
                 |
                 ---_PyType_Lookup
                    _PyObject_GenericGetAttrWithDict
                    PyEval_EvalFrameEx
                    PyEval_EvalCodeEx
                    PyEval_EvalFrameEx
                    PyEval_EvalCodeEx
                    PyEval_EvalFrameEx
                    |
                    |--75.00%-- PyEval_EvalFrameEx
                    |
                     --25.00%-- PyEval_EvalCodeEx
                               PyEval_EvalFrameEx
                               PyEval_EvalFrameEx

     3.57%  irqbalance  irqbalance           [.] 0x0000000000004038
            |
            ---0x4038
               0x4761
               0x4761
               0x4761
               0x49f1
               0x2295

     3.57%  irqbalance  libc-2.17.so         [.] __GI_____strtoull_l_internal
            |
            ---__GI_____strtoull_l_internal
               0x6f49
               0x229a

     3.57%  irqbalance  libc-2.17.so         [.] __strchrnul
            |
            ---__strchrnul
               vfprintf
               __vsprintf_chk
               __sprintf_chk
               0x2724
               0x4038
               0x2331

     3.57%  irqbalance  libc-2.17.so         [.] __strstr_sse42
            |
            ---__strstr_sse42
               0x71e0
               0x229f

  # And now to some userspace ftrace on uninstrumented binaries 8-) :
  # Hand edited to make it a bit more compact, replacing /home/acme/bin/perf
  # with /bin/perf:

  [root@perf4 ~]# perf script
     perf 8921 [3] 7.310889: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310889: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310889: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310889: 1 branches:u:       481630 perf_evlist__enable (/bin/perf) => 4816d8 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310889: 1 branches:u:       4816de perf_evlist__enable (/bin/perf) => 48164f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310889: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310889: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
     perf 8921 [3] 7.310889: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310889: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
     perf 8921 [3] 7.310890: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310890: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310890: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310890: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310890: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
     perf 8921 [3] 7.310890: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310890: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
     perf 8921 [3] 7.310893: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310893: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310893: 1 branches:u:       4816a8 perf_evlist__enable (/bin/perf) => 4815f8 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310893: 1 branches:u:       4815fe perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310893: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310893: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
     perf 8921 [3] 7.310893: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310893: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
     perf 8921 [3] 7.310956: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310956: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310956: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310956: 1 branches:u:       481630 perf_evlist__enable (/bin/perf) => 4816d8 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310956: 1 branches:u:       4816de perf_evlist__enable (/bin/perf) => 48164f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310956: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310956: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
     perf 8921 [3] 7.310956: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310956: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
     perf 8921 [3] 7.310961: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310961: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310961: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310961: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310961: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
     perf 8921 [3] 7.310961: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310961: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
     perf 8921 [3] 7.310968: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310968: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310968: 1 branches:u:       4816a8 perf_evlist__enable (/bin/perf) => 4815f8 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310968: 1 branches:u:       4815fe perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310968: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.310968: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
     perf 8921 [3] 7.310968: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.310968: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
     perf 8921 [3] 7.311040: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.311040: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.311040: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.311040: 1 branches:u:       481630 perf_evlist__enable (/bin/perf) => 4816d8 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.311040: 1 branches:u:       4816de perf_evlist__enable (/bin/perf) => 48164f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.311040: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.311040: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
     perf 8921 [3] 7.311040: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.311040: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
     perf 8921 [3] 7.311046: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.311046: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.311046: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.311046: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
     perf 8921 [3] 7.311046: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
     perf 8921 [3] 7.311046: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.311046: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
     perf 8921 [3] 7.311050: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
     perf 8921 [3] 7.311050: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
:
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1437150840-31811-8-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add support for Intel Processor Trace.

Intel PT support fits within the new auxtrace infrastructure.  Recording
is supporting by identifying the Intel PT PMU, parsing options and
setting up events.

Decoding is supported by queuing up trace data by cpu or thread and then
decoding synchronously delivering synthesized event samples into the
session processing for tools to consume.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1437150840-31811-7-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Move the x86 arch objects building under build framework to be included
in the libperf build object.

Adding also arch/$(ARCH)/Build files for the rest of the archs. The
reason for this is that in arch/Build we now do:

  +libperf-y += $(ARCH)/

which would make the build to fail on other architectures, because the
build framework requires 'Build' file in nested directories and this
patch adds it only for x86.
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Tested-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Tested-by: NWill Deacon <will.deacon@arm.com>
Cc: Alexis Berlemont <alexis.berlemont@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-5enob06z07m7ew6nzzdmp3n2@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Move the rdtsc() function so it can be reusued.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1406035081-14301-24-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

It is possible to record a perf.data file on one architecture and
process it on another.

Consequently, TSC conversion functions need to be moved out of the arch
directory.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1405332185-4050-40-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Moving pr_* debug macros to have it with in same object as debug
variables, becase we will change them to use verbose variable in next
patch.
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1405374411-29012-3-git-send-email-jolsa@kernel.org
[ Add missing debug.h include in python scripting glue and in the libdw unwind lib ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Current code skips output of the x86 specific HLT event in order to
avoid flooding the output with enabled --duration option. The events to
be skipped should be architecture dependent, though.

Let's add an architecture specific array of events to be skipped and
introduce a skip_event() function checking against that array.
Reviewed-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NAlexander Yarygin <yarygin@linux.vnet.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1404397747-20939-4-git-send-email-yarygin@linux.vnet.ibm.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Parts of a 'perf kvm stat' code make sense only for x86.

Let's move this code into the arch/x86/kvm-stat.c file and add
util/kvm-stat.h for generic structure definitions.

Add a global array 'kvm_reg_events_ops' for accessing the arch-specific
'kvm_events_ops' from generic code.

Since the several global arrays (i.e. 'kvm_events_tp') have been moved
to arch/*, we can not know their sizes and use them directly in
builtin-kvm.c. This patch fixes that problem by adding trimming NULL
element to each array and changing the behavior of their handlers in
generic code.
Reviewed-by: NDavid Ahern <dsahern@gmail.com>
Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NAlexander Yarygin <yarygin@linux.vnet.ibm.com>
Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1404397747-20939-3-git-send-email-yarygin@linux.vnet.ibm.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Combine all definitions into a common tools/include/linux/types.h and
kill the wild growth elsewhere. Move DECLARE_BITMAP to its proper
bitmap.h header.
Signed-off-by: NBorislav Petkov <bp@suse.de>
Acked-by: NRusty Russell <rusty@rustcorp.com.au>
Link: http://lkml.kernel.org/n/tip-azczs7qcv6h9xek9od10hiv2@git.kernel.orgSigned-off-by: NJiri Olsa <jolsa@kernel.org>

Adding libdw DWARF post unwind support, which is part of
elfutils-devel/libdw-dev package from version 0.158.

The new code is contained in unwin-libdw.c object, and implements
unwind__get_entries unwind interface function.

New Makefile variable NO_LIBDW_DWARF_UNWIND was added to control its
compilation, and is marked as disabled now.  It's factored with the rest
of the Makefile unwind build code in the next patch.

Arch specific code was added for x86.
Signed-off-by: NJiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1392825179-5228-5-git-send-email-jolsa@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Renaming unwind__arch_reg_id into libunwind__arch_reg_id, so it's clear
it's specific to libunwind.
Signed-off-by: NJiri Olsa <jolsa@redhat.com>
Acked-by: NJean Pihet <jean.pihet@linaro.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1389098853-14466-11-git-send-email-jolsa@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

We are going to add libdw library support to do dwarf post unwind.

Making the code ready by moving libunwind dwarf post unwind stuff into
separate object.
Signed-off-by: NJiri Olsa <jolsa@redhat.com>
Acked-by: NJean Pihet <jean.pihet@linaro.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1389098853-14466-10-git-send-email-jolsa@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Standardize all the feature flags based on the HAVE_{FEATURE}_SUPPORT naming convention:

		HAVE_ARCH_X86_64_SUPPORT
		HAVE_BACKTRACE_SUPPORT
		HAVE_CPLUS_DEMANGLE_SUPPORT
		HAVE_DWARF_SUPPORT
		HAVE_ELF_GETPHDRNUM_SUPPORT
		HAVE_GTK2_SUPPORT
		HAVE_GTK_INFO_BAR_SUPPORT
		HAVE_LIBAUDIT_SUPPORT
		HAVE_LIBELF_MMAP_SUPPORT
		HAVE_LIBELF_SUPPORT
		HAVE_LIBNUMA_SUPPORT
		HAVE_LIBUNWIND_SUPPORT
		HAVE_ON_EXIT_SUPPORT
		HAVE_PERF_REGS_SUPPORT
		HAVE_SLANG_SUPPORT
		HAVE_STRLCPY_SUPPORT

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-u3zvqejddfZhtrbYbfhi3spa@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>

Solve the problems around the broken definition of perf_event_mmap_page::
cap_usr_time and cap_usr_rdpmc fields which used to overlap, partially
fixed by:

  860f085b ("perf: Fix broken union in 'struct perf_event_mmap_page'")

The problem with the fix (merged in v3.12-rc1 and not yet released
officially), noticed by Vince Weaver is that the new behavior is
not detectable by new user-space, and that due to the reuse of the
field names it's easy to mis-compile a binary if old headers are used
on a new kernel or new headers are used on an old kernel.

To solve all that make this change explicit, detectable and self-contained,
by iterating the ABI the following way:

 - Always clear bit 0, and rename it to usrpage->cap_bit0, to at least not
   confuse old user-space binaries. RDPMC will be marked as unavailable
   to old binaries but that's within the ABI, this is a capability bit.

 - Rename bit 1 to ->cap_bit0_is_deprecated and always set it to 1, so new
   libraries can reliably detect that bit 0 is deprecated and perma-zero
   without having to check the kernel version.

 - Use bits 2, 3, 4 for the newly defined, correct functionality:

	cap_user_rdpmc		: 1, /* The RDPMC instruction can be used to read counts */
	cap_user_time		: 1, /* The time_* fields are used */
	cap_user_time_zero	: 1, /* The time_zero field is used */

 - Rename all the bitfield names in perf_event.h to be different from the
   old names, to make sure it's not possible to mis-compile it
   accidentally with old assumptions.

The 'size' field can then be used in the future to add new fields and it
will act as a natural ABI version indicator as well.

Also adjust tools/perf/ userspace for the new definitions, noticed by
Adrian Hunter.
Reported-by: NVince Weaver <vincent.weaver@maine.edu>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Also-Fixed-by: NAdrian Hunter <adrian.hunter@intel.com>
Link: http://lkml.kernel.org/n/tip-zr03yxjrpXesOzzupszqglbv@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>

On Fedora 18, with gcc 4.6.4 compile fails with:

arch/x86/util/tsc.c: In function ‘perf_time_to_tsc’:
arch/x86/util/tsc.c:13:6: error: declaration of ‘time’ shadows a global declaration [-Werror=shadow]
cc1: all warnings being treated as errors
make: *** [/tmp/junk/arch/x86/util/tsc.o] Error 1
make: *** Waiting for unfinished jobs....

Fix by renaming the local variable.
Signed-off-by: NDavid Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Link: http://lkml.kernel.org/r/1374848843-43127-1-git-send-email-dsahern@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

The test uses the newly added cap_usr_time_zero and time_zero of
perf_event_mmap_page.  TSC from rdtsc is compared with the time
from 2 perf events.  The test passes if the calculated times are
all in the correct order.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1372425741-1676-4-git-send-email-adrian.hunter@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

Including libio.h causes build failures on uClibc systems (which lack
libio.h).

It appears that libio.h was only included to pull in a definition for
NULL, so it has been replaced by stddef.h.

On powerpc, libio.h was conditionally included, but could be removed
completely as it is unneeded. Also, the included of stdlib.h was changed
to stddef.h (as again, only NULL is needed).
Signed-off-by: NCody P Schafer <cody@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1363300074-26288-1-git-send-email-cody@linux.vnet.ibm.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

This brings the support for DWARF cfi unwinding on perf post
processing. Call frame informations are retrieved and then passed
to libunwind that requests memory and register content from the
applications.

Adding unwind object to handle the user stack backtrace based
on the user register values and user stack dump.

The unwind object access the libunwind via remote interface
and provides to it all the necessary data to unwind the stack.

The unwind interface provides following function:
	unwind__get_entries

And callback (specified in above function) to retrieve
the backtrace entries:
	typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry,
					 void *arg);
Signed-off-by: NJiri Olsa <jolsa@redhat.com>
Original-patch-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Arun Sharma <asharma@fb.com>
Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Ulrich Drepper <drepper@gmail.com>
Link: http://lkml.kernel.org/r/1344345647-11536-12-git-send-email-jolsa@redhat.com
[ Replaced use of perf_session by usage of perf_evsel ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Several places were expecting that the value returned was the number of
characters printed, not what would be printed if there was space.

Fix it by using the scnprintf and vscnprintf variants we inherited from
the kernel sources.

Some corner cases where the number of printed characters were not
accounted were fixed too.
Reported-by: NAnton Blanchard <anton@samba.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Eric B Munson <emunson@mgebm.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/n/tip-kwxo2eh29cxmd8ilixi2005x@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

The goal of this patch is to include more information about the host
environment into the perf.data so it is more self-descriptive. Overtime,
profiles are captured on various machines and it becomes hard to track
what was recorded, on what machine and when.

This patch provides a way to solve this by extending the perf.data file
with basic information about the host machine. To add those extensions,
we leverage the feature bits capabilities of the perf.data format.  The
change is backward compatible with existing perf.data files.

We define the following useful new extensions:
 - HEADER_HOSTNAME: the hostname
 - HEADER_OSRELEASE: the kernel release number
 - HEADER_ARCH: the hw architecture
 - HEADER_CPUDESC: generic CPU description
 - HEADER_NRCPUS: number of online/avail cpus
 - HEADER_CMDLINE: perf command line
 - HEADER_VERSION: perf version
 - HEADER_TOPOLOGY: cpu topology
 - HEADER_EVENT_DESC: full event description (attrs)
 - HEADER_CPUID: easy-to-parse low level CPU identication

The small granularity for the entries is to make it easier to extend
without breaking backward compatiblity. Many entries are provided as
ASCII strings.

Perf report/script have been modified to print the basic information as
easy-to-parse ASCII strings. Extended information about CPU and NUMA
topology may be requested with the -I option.

Thanks to David Ahern for reviewing and testing the many versions of
this patch.

 $ perf report --stdio
 # ========
 # captured on : Mon Sep 26 15:22:14 2011
 # hostname : quad
 # os release : 3.1.0-rc4-tip
 # perf version : 3.1.0-rc4
 # arch : x86_64
 # nrcpus online : 4
 # nrcpus avail : 4
 # cpudesc : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
 # cpuid : GenuineIntel,6,15,11
 # total memory : 8105360 kB
 # cmdline : /home/eranian/perfmon/official/tip/build/tools/perf/perf record date
 # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 29, 30, 31,
 # HEADER_CPU_TOPOLOGY info available, use -I to display
 # HEADER_NUMA_TOPOLOGY info available, use -I to display
 # ========
 #
 ...

 $ perf report --stdio -I
 # ========
 # captured on : Mon Sep 26 15:22:14 2011
 # hostname : quad
 # os release : 3.1.0-rc4-tip
 # perf version : 3.1.0-rc4
 # arch : x86_64
 # nrcpus online : 4
 # nrcpus avail : 4
 # cpudesc : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
 # cpuid : GenuineIntel,6,15,11
 # total memory : 8105360 kB
 # cmdline : /home/eranian/perfmon/official/tip/build/tools/perf/perf record date
 # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 29, 30, 31,
 # sibling cores   : 0-3
 # sibling threads : 0
 # sibling threads : 1
 # sibling threads : 2
 # sibling threads : 3
 # node0 meminfo  : total = 8320608 kB, free = 7571024 kB
 # node0 cpu list : 0-3
 # ========
 #
 ...
Reviewed-by: NDavid Ahern <dsahern@gmail.com>
Tested-by: NDavid Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20110930134040.GA5575@quadSigned-off-by: NStephane Eranian <eranian@google.com>
[ committer notes: Use --show-info in the tools as was in the docs, rename
  perf_header_fprintf_info to perf_file_section__fprintf_info, fixup
  conflict with f69b64f7 "perf: Support setting the disassembler style" ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

The perf userspace tool included some architecture specific code to map
registers from the DWARF register number into the names used by the regs
and stack access API.

This moves the architecture specific code out into a separate
arch/x86 directory along with the infrastructure required to use it.
Signed-off-by: NIan Munsie <imunsie@au.ibm.com>
Acked-by: NMasami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>