Re: [Qemu-devel] [PATCH 1/2] pci: Add pci_device_get_host_irq

[Michael S. Tsirkin]

On Wed, May 30, 2012 at 04:38:25PM +0200, Jan Kiszka wrote:
> On 2012-05-30 15:34, Michael S. Tsirkin wrote:
> > Below's as far as I got - hopefully this
> > explains what I had in mind: for deep hierarchies
> > this will save a bus scan so I think this makes sense
> > even in the absense of kvm irqchip.
> > 
> > Warning: completely untested and known to be incomplete.
> > Please judge whether this is going in a direction that
> > is helpful for your efforts. If you respond in the positive,
> > I hope to be able to get back to this next week.
> 
> We need to
>  - account for polarity changes along the route
>  - get rid of irq_count as it is no longer updated in the fast path,
>    thus useless on routing updates

I'll need to consider this more to understand what you mean here.

> So it's a bit more complicated and requires a some broader refactorings.

Is this one good as a first step then?
If not I'll drop it for now.

> But there is likely some room for simplifications in the end, true.
> 
> Jan
> 
> -- 
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