Re: [PATCH RFC v1 2/2] hyper-v: initialize Hyper-V CPUID leafs.

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On 10/17/2011 12:41 PM, Avi Kivity wrote:
>  Even not counting that hyper-v support should IMHO not be in
>  KVM-specific code, I still think this shouldn't remove KVM leaves
>  completely but rather move them to 0x40000100.  The KVM
>  paravirtualization code then can similarly probe with 0x100 stride up
>  to 0x40001000.  This is what was done for Xen, and it allows to enable
>  enlightenments independent of whether the guest is Linux or Windows.
>
>  However, let's get a third opinion---Avi, what do you think?

I agree with you, especially as this already works for Xen.

Note it doesn't completely solve the issue (so we have two interfaces,
which is the preferred one?), but it's better than nothing.

Windows doesn't look beyond 0x40000000, so Hyper-V stays there and KVM has to shift. So MS solved that part for us. :)

Paolo
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