From: Stephane Eranian <eranian@google.com>
Date: Thu, 9 Feb 2012 22:20:56 +0000 (+0100)
Subject: perf/x86: Disable LBR support for older Intel Atom processors
X-Git-Tag: v3.4-rc1~192^2^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=88c9a65e13f393fd60d8b9e9c659a34f9e39967d;p=pandora-kernel.git

perf/x86: Disable LBR support for older Intel Atom processors

The patch adds a restriction for Intel Atom LBR support. Only
steppings 10 (PineView) and more recent are supported. Older models
do not have a functional LBR. Their LBR does not freeze on PMU
interrupt which makes LBR unusable in the context of perf_events.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1328826068-11713-7-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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