Re: [Xen-ia64-devel] [PATCH][RFC][TAKE4] the P2M/VP patches

[Tristan Gingold <Tristan.Gingold@xxxxxxxx>]

Le Mercredi 12 Avril 2006 09:07, Tian, Kevin a écrit :
> From: Tristan Gingold [mailto:Tristan.Gingold@xxxxxxxx]
>
> >Sent: 2006年4月12日 15:08
> >
> >Le Mercredi 12 Avril 2006 08:12, Tian, Kevin a écrit :
> >> From: Isaku Yamahata [mailto:yamahata@xxxxxxxxxxxxx]
> >
> >[...]
> >
> >> >That's an access to keyboard port possibly because now xen0/xenU
> >> >
> >> >> is compiled as one image with more drivers added. Maybe it's
> >
> >better
> >
> >> >> for us to map all 64M mmio area of domU to a dummy page at
> >
> >current
> >
> >> >> stage, to remove warnings and walk around some native drivers
> >> >> within domU. Later when driver domain is added, we can map
> >
> >specific
> >
> >> >> mmio page to machine mmio range per configuration.
> >> >
> >> >I agree with you.
> >> >But this issues isn't specific to the P2M/VP patch.
> >
> >I don't agree with this solution.  I really prefer to have warnings
> > because it
> >means something got wrong.  domU shouldn't access to mmio.
> >
> >If you use a dummy page, a device driver may loop.
>
> Either way. Currently return 0 after warning actually same as dummy
> page.
What about write accesses ?

Tristan.


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