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Re: [Qemu-devel] [PATCH 2/2] Route IOAPIC interrupts via ISA bus

From: Gleb Natapov
Subject: Re: [Qemu-devel] [PATCH 2/2] Route IOAPIC interrupts via ISA bus
Date: Wed, 26 Aug 2009 22:09:44 +0300

On Wed, Aug 26, 2009 at 06:30:54PM +0200, Gerd Hoffmann wrote:
> On 08/26/09 18:06, Avi Kivity wrote:
> >On 08/26/2009 07:03 PM, Gerd Hoffmann wrote:
> >>Now we probably need some acpi magic to tell the guest OS that there
> >>are a few more IRQ lines?
> >
> >I wanted to route the PCI IRQs to those lines (and have eight links
> >instead of four).
> Right now we have IRQs 5,10,11 for PCI.  Having one more IRQ (so we
> have one for each link) would be useful IMHO.  eight links + eight
> irqs would be even more useful.  What needs to be done for that?
Current code uses piix3 irq router to route pci interrupts to pic _and_
ioapic and piix3 irq router supports only 16 interrupts.


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