Re: PAE support time estimate?

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Fri, Sep 08, 2006 at 10:56:36PM +0200, Manuel Bouyer wrote:
> On Thu, Sep 07, 2006 at 07:34:54PM +0200, Florian Heigl wrote:
> > Hi,
> > 
> > is there any way of estimating when a NetBSD domU will work within a
> > PAE-enabled Xen/Linux dom0 kernel?
> 
> AFAIK nobody is working on PAE support. x86_64 is probably easier

On second though it may not be that hard, if we support it on Xen and
don't want to support more than 4GB in a guest. Because of the extra
layer between pseudo-physical and machine addresses in Xen, we woulnd't need
to change paddr_t to 64 bits, and just handle 64k addresses for machine
addresses. This shouldn't touch much outside of arch/xen.

There may be issues for drivers using bus_dma, but for domU guests it
should be quite straitforward.

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