Re: [Xen-devel] Re: IRQs delivery.

[Tristan Gingold <Tristan.Gingold@xxxxxxxx>]

Le Vendredi 10 Mars 2006 16:30, Hollis Blanchard a écrit :
> On Friday 10 March 2006 04:07, Tristan Gingold wrote:
> > How xen/ppc delivers interrupts ?
[...]
Thank you for the vast amount of details.
> > on xen-ia64-devel, we are currently discussing on IRQ delivery.
> > Xen/x86 delivers IRQs using the event channel.
> > Xen/ia64 currently delivers IRQs using the virtualized hardware way.
> >
> > Is there major drawbacks about not using event channel (from a XEN POV) ?
>
> I'm not sure what "the virtualized hardware way" is. You probably need to
> virtualize the PIC *somehow*, and the Xen event channels are as good a way
> as any to do that. If IA64 already has an unrelated way of virtualizing the
> PIC (as PPC did with the rhype model), then you get to choose. If that's
> the case, I would recommend adopting the event channels to share more Xen
> code and design...
On ia64, PIC is part of the processor and is already fully-virtualized.
We are considering to switch to event channel.

Thanks,
Tristan.


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