Re: [Qemu-devel] [PATCH 1/2] Route PC irqs to ISA bus instead of i8259 directly

[Avi Kivity]

On 08/10/2009 11:34 AM, Gerd Hoffmann wrote:
> On 08/09/09 18:44, Avi Kivity wrote:
> > A PC has its motherboard IRQ lines connected to both the PIC and IOAPIC.
> > Currently, qemu routes IRQs to the PIC which then calls the IOAPIC, an
> > incestuous arrangement.  In order to clean this up, create a new ISA IRQ
> > abstraction, and have devices raise ISA IRQs (which in turn raise the 
> > i8259
> > IRQs as usual).
>
> There are isa-bus qdev patches in anthonys patch queue.  I think it 
> makes sense to do this cleanup on top of the isa-bus patches.  Maybe 
> it makes sense to integrate it more, i.e. have the irqs as element in 
> IsaBus ...

One thing at a time.

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