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Re: [Xen-devel] [VTD][PATCH] Support intra-domain shared interrupt

On 5/11/07 08:52, "Han, Weidong" <weidong.han@xxxxxxxxx> wrote:

> that situation two devices with different pyhsical IRQs getting aliased
> to the same guest GSI is hard to occur. And we need one guest GSI mapped
> to only one physical IRQ, or we can't know which device issues the guest
> GSI. Ideally, if we can make 1:1 mapping between guest GSI and physcial
> IRQ, the intra-domain shared interrupt can naturally handled by guest.

Ah, that's true. I suppose you can assign virtual devfn locations for
devices to purposely avoid aliasing in GSI space. What do you do about
aliasing into the ISA IRQ space?

 -- Keir

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