linux-kernel - Re: i686 quirk for AMD Geode

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Date:	Tue, 10 Nov 2009 17:24:54 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Avi Kivity <avi@...hat.com>, Willy Tarreau <w@....eu>,
	Pavel Machek <pavel@....cz>,
	Matteo Croce <technoboy85@...il.com>,
	Sven-Haegar Koch <haegar@...net.de>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: i686 quirk for AMD Geode

On Tue, 10 Nov 2009 09:08:20 -0800
"H. Peter Anvin" <hpa@...or.com> wrote:

> On 11/10/2009 02:56 AM, Alan Cox wrote:
> >> In theory yes.  There would need to be a bit of work to disassociate it 
> >> from kvm, but nothing too difficult.
> > 
> > For the tiny cases that actually matter using the KVM code appears a bit
> > over the top.
> 
> In the short term, yes, of course.  However, if we're going to do
> emulation, we might as well do it right.

Why is using KVM doing it right ? It sounds like its doing it slowly,
and hideously memory inefficiently. You are solving an uninteresting
general case problem when you just need two tiny fixups (or perhaps 3 if
you want to fix up early x86-64 prefetch)
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