Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH 1/2] perf, x86: Add INTEL_FLAGS_UEVENT_CONSTRAINT | Date | Tue, 9 Sep 2014 17:49:07 -0700 |
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From: Andi Kleen <ak@linux.intel.com>
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@linux.intel.com> --- 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) -- 1.9.3
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