linux-kernel - Re: [PATCH 02/31] perf, x86: Basic Haswell PMU support

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Message-ID: <1348845667.3292.86.camel@twins>
Date:	Fri, 28 Sep 2012 17:21:07 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Andi Kleen <andi@...stfloor.org>, Andi Kleen <ak@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>, acme@...hat.com,
	x86@...nel.org
Subject: Re: [PATCH 02/31] perf, x86: Basic Haswell PMU support

On Fri, 2012-09-28 at 17:14 +0200, Stephane Eranian wrote:
> But then what happens if I pass a raw value that sets those bits on a
> processor without TSX?

We could filter those bits depending on cpu_has_rtm && cpu_has_hle on
event creation.

But fixed event constraints could include superfluous bits just fine,
they'll never appear.
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