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Basic perf PMU support for Haswell v9

From:  Andi Kleen <andi@firstfloor.org>
To:  a.p.zijlstra@chello.nl
Subject:  Basic perf PMU support for Haswell v9
Date:  Fri, 8 Mar 2013 15:49:28 -0800
Message-ID:  <1362786573-18455-1-git-send-email-andi@firstfloor.org>
Cc:  mingo@kernel.org, linux-kernel@vger.kernel.org
Archive-link:  Article, Thread

This is based on v7 of the full Haswell PMU support,
rebased, reviewer-optimized and stripped down to the bare bones

Most interesting new features are not in this patchkit
(full version is git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git hsw/pmu5)

Contains support for:
- Basic Haswell PMU and PEBS support
- Late unmasking of the PMI
- Basic LBRv4 support

v2: Addressed Stephane's feedback. See individual patches for details.
v3: now even more bite-sized. Qualifier constraints merged earlier.
v4: Rename some variables, add some comments and other minor changes.
Add some Reviewed/Tested-bys.
v5: Address some minor review feedback. Port to latest perf/core
v6: Add just some variable names, add comments, edit descriptions, some
more testing, rebased to latest perf/core
v7: Expand comment
v8: Rename structure field.
v9: No wide counters, but add basic LBRs. Add some more 
constraints. Rebase to 3.9rc1

-Andi
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