Kim Phillips f967140dfb perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag ... 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		2020-03-12 14:08:50 +01:00
..
amd	perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag	2020-03-12 14:08:50 +01:00
intel	perf/x86/intel: Fix inaccurate period in context switch for auto-reload	2020-02-11 13:23:27 +01:00
core.c	perf/x86/amd: Add support for Large Increment per Cycle Events	2020-01-17 10:19:26 +01:00
Kconfig	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Makefile	perf/x86: Add MSR probe interface	2019-06-24 19:28:31 +02:00
msr.c	perf/x86/msr: Add Tremont support	2020-02-11 13:17:50 +01:00
perf_event.h	perf/x86/amd: Add support for Large Increment per Cycle Events	2020-01-17 10:19:26 +01:00
probe.c	perf/x86: Add MSR probe interface	2019-06-24 19:28:31 +02:00
probe.h	perf/x86: Add MSR probe interface	2019-06-24 19:28:31 +02:00