From: Vince Weaver <vincent.weaver@maine.edu>
Date: Wed, 17 Oct 2012 17:05:45 +0000 (-0400)
Subject: perf/x86: Enable overflow on Intel KNC with a custom knc_pmu_handle_irq()
X-Git-Tag: v3.7-rc3~20^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e4074b3049f99c6ad6e1a33e6d93d8ec0652e2c1;p=pandora-kernel.git

perf/x86: Enable overflow on Intel KNC with a custom knc_pmu_handle_irq()

Although based on the Intel P6 design, the interrupt mechnanism
for KNC more closely resembles the Intel architectural
perfmon one.

We can't just re-use that code though, because KNC has different
MSR numbers for the status and ack registers.

In this case we just cut-and paste from perf_event_intel.c
with some minor changes, as it looks like it would not be
worth the trouble to change that code to be MSR-configurable.

Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: eranian@gmail.com
Cc: Meadows Lawrence F <lawrence.f.meadows@intel.com>
Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1210171304410.23243@vincent-weaver-1.um.maine.edu
[ Small stylistic edits. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

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