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mirror_ubuntu-kernels/tools/perf/arch/x86/util
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Kan Liang 91a8c5b840 perf intel-pt: Always set no branch for dummy event 
An earlier kernel patch allowed enabling PT and LBR at the same time on
Goldmont.

commit ccbebba4c6 ("perf/x86/intel/pt: Bypass PT vs. LBR exclusivity
if the core supports it")

However, users still cannot use Intel PT and LBRs simultaneously.  $
sudo perf record -e cycles,intel_pt//u -b  -- sleep 1 Error: PMU
Hardware doesn't support sampling/overflow-interrupts.

PT implicitly adds dummy event in perf tool. dummy event is software
event which doesn't support LBR.

Always setting no branch for dummy event in Intel PT.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170630141656.1626-2-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-07-20 09:55:51 -03:00
..
auxtrace.c perf tools: Include errno.h where needed 2017-04-19 13:01:51 -03:00
Build perf unwind: Separate local/remote libunwind config 2016-06-07 12:08:52 -03:00
dwarf-regs.c perf dwarf: Guard !x86_64 definitions under #ifdef else clause 2016-04-08 12:04:29 -03:00
group.c perf stat: Basic support for TopDown in perf stat 2016-06-06 17:04:15 -03:00
header.c perf tools: Support CPU id matching for x86 v2 2016-10-03 19:58:01 -03:00
intel-bts.c perf intel-pt/bts: Remove unused SAMPLE_SIZE defines and bts priv array 2017-06-19 15:27:09 -03:00
intel-pt.c perf intel-pt: Always set no branch for dummy event 2017-07-20 09:55:51 -03:00
kvm-stat.c perf tools: Include errno.h where needed 2017-04-19 13:01:51 -03:00
perf_regs.c perf tools: Include errno.h where needed 2017-04-19 13:01:51 -03:00
pmu.c perf tools: Add Intel BTS support 2015-08-21 11:34:10 -03:00
tsc.c perf record: Robustify perf_event__synth_time_conv() 2016-05-30 12:41:44 -03:00
unwind-libdw.c perf tools: Use just forward declarations for struct thread where possible 2017-04-24 13:43:35 -03:00
unwind-libunwind.c perf callchain: Support x86 target platform 2016-06-07 15:13:27 -03:00