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Re: [Xen-devel] [PATCH 2/2] hvm: allow pass-through of new CPUID feature

To: Andre Przywara <andre.przywara@xxxxxxx>
Subject: Re: [Xen-devel] [PATCH 2/2] hvm: allow pass-through of new CPUID features
From: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Date: Wed, 26 Jan 2011 16:05:54 +0000
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxx>
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Andre Przywara writes ("[Xen-devel] [PATCH 2/2] hvm: allow pass-through of new 
CPUID features"):
> there are some new CPUID features that are safe for guests to see, as 
> they don't require OS awareness (FPU/ALU related instructions only). 
> Among features for new AMD CPUs there is also the PCLMULQDQ bit, which 
> Intel CPU have already for quite a while.

This would seem to be a new feature.  We are currently in feature

Can you make a justification for a freeze exception ?


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