From: Zhang, Yanmin <yanmin_zhang@linux.intel.com>
Date: Fri, 6 Aug 2010 05:39:08 +0000 (+0800)
Subject: perf, x86: Fix Intel-nhm PMU programming errata workaround
X-Git-Tag: v2.6.36-rc2~33^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=351af0725e5222e35741011d1ea62215c1ed06db;p=pandora-kernel.git

perf, x86: Fix Intel-nhm PMU programming errata workaround

Fix the Errata AAK100/AAP53/BD53 workaround, the officialy documented
workaround we implemented in:

 11164cd: perf, x86: Add Nehelem PMU programming errata workaround

doesn't actually work fully and causes a stuck PMU state
under load and non-functioning perf profiling.

A functional workaround was found by trial & error.

Affects all Nehalem-class Intel PMUs.

Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1281073148.2125.63.camel@ymzhang.sh.intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <stable@kernel.org> # .35.x
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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