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

H. Peter Anvin
2009-03-16T01:06:52Z

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.