[tip:perf/core] perf/x86: Add INTEL_FLAGS_UEVENT_CONSTRAINT

[tip-bot for Andi Kleen]

Commit-ID:  7550ddffe4c8040db31c66e5bd64531e2916bbf1
Gitweb:     http://git.kernel.org/tip/7550ddffe4c8040db31c66e5bd64531e2916bbf1
Author:     Andi Kleen <ak@xxxxxxxxxxxxxxx>
AuthorDate: Wed, 24 Sep 2014 07:34:46 -0700
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Sun, 16 Nov 2014 11:41:54 +0100

perf/x86: Add INTEL_FLAGS_UEVENT_CONSTRAINT

Add a FLAGS_UEVENT_CONSTRAINT macro that allows us to
match on event+umask, and in additional all flags.

This is needed to ensure the INV and CMASK fields
are zero for specific events, as this can cause undefined
behavior.

Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxx>
Cc: Maria Dimakopoulou <maria.n.dimakopoulou@xxxxxxxxx>
Cc: Mark Davies <junk@xxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1411569288-5627-1-git-send-email-andi@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/x86/kernel/cpu/perf_event.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index fc5eb39..4e6cdb0 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -253,6 +253,10 @@ struct cpu_hw_events {
 #define INTEL_UEVENT_CONSTRAINT(c, n)	\
 	EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK)
 
+/* Like UEVENT_CONSTRAINT, but match flags too */
+#define INTEL_FLAGS_UEVENT_CONSTRAINT(c, n)	\
+	EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS)
+
 #define INTEL_PLD_CONSTRAINT(c, n)	\
 	__EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \
 			   HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LDLAT)
--
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