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Date: Thu, 16 Sep 2010 16:35:50 +0200
From: "Roedel, Joerg" <Joerg.Roedel@amd.com>
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Subject: [Qemu-devel] Re: [PATCH 3/3] Add svm cpuid features
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To: Alexander Graf <agraf@suse.de>
Cc: Marcelo Tosatti <mtosatti@redhat.com>, Avi Kivity <avi@redhat.com>, "kvm@vger.kernel.org" <kvm@vger.kernel.org>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

On Thu, Sep 16, 2010 at 10:28:01AM -0400, Alexander Graf wrote:
> Roedel, Joerg wrote:
> > I'll remove it then. It would have been nice to have it there because it
> > will improve performance of svm emulation. But if it is about emulating
> > the real cpu then I'll just drop it.
> 
> speed == -cpu host :). If the performance increase is significant, we
> can always add a new cpu type for a cpu that does support those flags so
> people can use it there and still be migration safe. In fact, that would
> even benefit you guys as you'd sell more new machines for speed ;).

Well, since its emulated completly in software it would be available on
all hosts that start with -cpu phenom (at least if they use the same kvm
version). So this would not break migration.

	Joerg

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