perf/x86/intel/ds: Fix EVENT vs. UEVENT PEBS constraints
authorStephane Eranian <eranian@google.com>
Tue, 21 May 2019 00:52:46 +0000 (17:52 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 22 Jun 2019 06:15:15 +0000 (08:15 +0200)
commit5a9c29cc21406cf782c31d7a59e61393ef704f47
tree357d4a198311766548b16849924e7033dbab55a7
parentdd9b6de79b67a125fe354af67ee938e1450b9c70
perf/x86/intel/ds: Fix EVENT vs. UEVENT PEBS constraints

[ Upstream commit 23e3983a466cd540ffdd2bbc6e0c51e31934f941 ]

This patch fixes an bug revealed by the following commit:

  6b89d4c1ae85 ("perf/x86/intel: Fix INTEL_FLAGS_EVENT_CONSTRAINT* masking")

That patch modified INTEL_FLAGS_EVENT_CONSTRAINT() to only look at the event code
when matching a constraint. If code+umask were needed, then the
INTEL_FLAGS_UEVENT_CONSTRAINT() macro was needed instead.
This broke with some of the constraints for PEBS events.

Several of them, including the one used for cycles:p, cycles:pp, cycles:ppp
fell in that category and caused the event to be rejected in PEBS mode.
In other words, on some platforms a cmdline such as:

  $ perf top -e cycles:pp

would fail with -EINVAL.

This patch fixes this bug by properly using INTEL_FLAGS_UEVENT_CONSTRAINT()
when needed in the PEBS constraint tables.

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: kan.liang@intel.com
Link: http://lkml.kernel.org/r/20190521005246.423-1-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
arch/x86/events/intel/ds.c