linux-kernel - RE: [PATCH][KVM][retry 3] Add support for Pause Filtering to AMD SVM

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Message-ID: <6453C3CB8E2B3646B0D020C11261327303620967@sausexmb4.amd.com>
Date:	Wed, 20 May 2009 08:52:10 -0500
From:	"Langsdorf, Mark" <mark.langsdorf@....com>
To:	"Peter Zijlstra" <peterz@...radead.org>,
	"Avi Kivity" <avi@...hat.com>
CC:	"Roedel, Joerg" <Joerg.Roedel@....com>, <kvm@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH][KVM][retry 3] Add support for Pause Filtering to AMD SVM

> > > Once we go change silicon, you might as well do it right.
> > >   
> > 
> > None of the major x86 vendors are under my control.
> 
> I thought this patch came from AMD, who changed their silicon 
> so 'solve' one of these virt problems.

Right, and the change we came up with was to provide
a method for filtering PAUSEs and then intercepting
after a certain number.

It may not be the solution you wanted, but I can't
change the silicon design that has the feature at 
this point.

-Mark Langsdorf
Operating System Research Center
AMD

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