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Kim Phillips 22333af249 perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag 
[ Upstream commit f967140dfb7442e2db0868b03b961f9c59418a1b ]

Enable the sampling check in kernel/events/core.c::perf_event_open(),
which returns the more appropriate -EOPNOTSUPP.

BEFORE:

  $ sudo perf record -a -e instructions,l3_request_g1.caching_l3_cache_accesses true
  Error:
  The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (l3_request_g1.caching_l3_cache_accesses).
  /bin/dmesg | grep -i perf may provide additional information.

With nothing relevant in dmesg.

AFTER:

  $ sudo perf record -a -e instructions,l3_request_g1.caching_l3_cache_accesses true
  Error:
  l3_request_g1.caching_l3_cache_accesses: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'

Fixes: c43ca5091a ("perf/x86/amd: Add support for AMD NB and L2I "uncore" counters")
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20200311191323.13124-1-kim.phillips@amd.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-03-20 09:07:56 +01:00
..
amd perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag 2020-03-20 09:07:56 +01:00
intel perf/x86/intel: Fix inaccurate period in context switch for auto-reload 2020-02-28 15:42:14 +01:00
core.c perf/x86/intel: Fix PT PMI handling 2020-01-12 11:24:24 +01:00
Kconfig perf/x86: Move Kconfig.perf and other perf configuration bits to events/Kconfig 2016-03-31 10:30:40 +02:00
Makefile x86/perf/intel/uncore: Make the Intel uncore PMU driver modular 2016-03-31 10:30:34 +02:00
msr.c x86/cpu: Sanitize FAM6_ATOM naming 2019-05-14 19:19:34 +02:00
perf_event.h perf/x86: Fixup typo in stub functions 2019-03-19 13:14:11 +01:00