From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rik van Riel <riel@redhat.com>
Subject: Re: x86-64 machine_to_phys vs NX bit
Date: Fri, 25 Aug 2006 11:19:21 -0400
Message-ID: <44EF14F9.2090309@redhat.com>
References: <C114D189.15C0%Keir.Fraser@cl.cam.ac.uk>
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To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: xen-devel@lists.xensource.com, "Nakajima, Jun" <jun.nakajima@intel.com>
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Keir Fraser wrote:
> 
> 
> On 25/8/06 3:46 pm, "Nakajima, Jun" <jun.nakajima@intel.com> 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?