Re: [Xen-devel] [PATCH] linux: fix IRQ handling for PV passthrough

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

On Wed, Feb 04, 2009 at 11:40:35AM +0000, Jan Beulich wrote:
> For DomU-s registering PIRQ-s must be done separately, as they don't
> use the IO-APIC code.
> 
> Additionally make sure the IRQ chip doesn't get set twice (and the
> event channel information overwritten) for an IRQ possibly in use by
> more than one device.
> 
> Obviously IA64 would need a similar fix, but I can't see where it would
> need to be put.

Thank you for taking care of IA64.
evtchan_register_pirq() doesn't have any effect on IA64 because
identity_mapped_irq() is defined to 1. So IA64 is ok without any fix.
Maybe in theory it should be called for consistency, though.

thanks,
-- 
yamahata

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