Re: [PATCH v3 5/6] KVM: MMU: abstract invalid guest pte mapping

Avi Kivity
2010-11-22T10:17:24Z

On 11/22/2010 12:18 PM, Xiao Guangrong wrote:
> >
> > I think the order is reversed. If !is_present_gpte(), it doesn't matter
> > if reserved bits are set or not.
> >
>
> if !is_present_gpte()&& is_rsvd_bits_set, then we may mark the spte notrap,
> so the guest will detect #PF with PFEC.P=PEFC.RSVD=0, but the appropriate PFEC
> is PFEC.P=0&& PEFC.RSVD=1 ?

I think the correct PFEC is .P = .RSVD = 0, but best to check on real
hardware to be sure.

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