Re: [Xen-devel] [PATCH 10/24] xen: mask XSAVE from cpuid

[H. Peter Anvin]

Arjan van de Ven wrote:
> 
> Well.. pretty much all new instructions need Xen modifications due to
> the need to be emulate to deal with traps/vmexits/etc right? 
> So I don't quite see many cpuid bits that would NOT involve some Xen
> modification or another ;)
> 

There are going to be a very small number which need only userspace
support.  However, there will be absolutely no way for Xen to know this
a priori.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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