Le Mardi 20 Juin 2006 04:56, Isaku Yamahata a écrit :
> On Mon, Jun 19, 2006 at 04:14:14PM +0200, Tristan Gingold wrote:
> > Hi,
> >
> > this is just a thought about page size.
> > Contrary to x86 there is no canonical ia64 page size (ps = page size)
> >
> > Currently we work with Xen ps == dom0 ps == domU ps.
> > I suppose others scheme are not working yet.
> >
> > The Xen hypervisor should be ready to support any domain whose ps >= Xen
> > ps.
> >
> > Dom0 tools are using PAGE_SIZE/PAGE_SHIFT instead of an hypothetical
> > XEN_PAGE_SIZE/XEN_PAGE_SHIFT.
> >
> > DomU uses only one page size for console/xenbus.
> >
> > We might want to be more generic for shared page + privreg page.
> >
> > Other issues ?
>
> Probably balloon driver, block front and netfront for domU.
Yes, I forgot them :-)
> Althogh I'm not sure that xen ps != dom0 ps is needed,
> If xen ps != dom0 ps,
> - dma paravirtualization
> (pfn_to_mfn_for_dma, __xen_create_contiguous_region(),
> __xen_destroy_contiguous_region())
> - block back, netback
> would be issues.
But assuming dom0 ps == xen ps means we want domU kernel != dom0 kernel...
> Exactly the p2m conversion, the XENMEM operation and
> the grant table operation would be issue.
So, a lot of difficult issues :-(
Tristan.
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