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Re: X server in dom0: Bad VBT signature

On Tue, Sep 04, 2012 at 09:14:45PM +0200, Gianluca Guida wrote:
> On Tue, Sep 04, 2012 at 10:02:14AM +0200, Manuel Bouyer wrote:
> > On Tue, Sep 04, 2012 at 06:48:02PM +0200, Gianluca Guida wrote:
> > > Isn't the problem here considering /dev/mem to be a sort of wrapper of
> > > two linear spaces?
> > 
> > Yes it is. In an ideal world the userland process should have a way to
> > express what space it wants.
> TBH, my question is why are we in this position to start with.
> Why not get the Xen's port physical machine look what it is in actual
> hardware, that is one single address space that contains RAM, I/O and
> other entries?

because that's not how xen works. Xen gives us a dense PA space,
starting at 0. Maybe with amd64 we could remap it, but that wouldn't
help much for i386, where we have to work with 4Gb anyway.

Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference

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