Re: [Xen-devel] x86-64 machine_to_phys vs NX bit

[Rik van Riel <riel@xxxxxxxxxx>]

Keir Fraser wrote:
> On 25/8/06 3:46 pm, "Nakajima, Jun" <jun.nakajima@xxxxxxxxx> wrote:
>
> > I agree, and I'm wondering why we don't have the same problem on i386?
> > To me it basically does the same thing.
> A long is only 32 bits there, so when we pass the MFN portion the NX bit is
> conveniently truncated away!
Which means it'll do the wrong thing for machine addresses > 4GB
on PAE, or am I overlooking something?

--
What is important?  What you want to be true, or what is true?

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