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

From: Isaku Yamahata
Subject: Re: [Qemu-devel] [PATCH 2/2] Route IOAPIC interrupts via ISA bus
Date: Thu, 27 Aug 2009 19:35:04 +0900
User-agent: Mutt/1.5.6i

On Thu, Aug 27, 2009 at 10:55:54AM +0200, Gerd Hoffmann wrote:
> On 08/27/09 10:18, Jamie Lokier wrote:
> >Gleb Natapov wrote:
> >>On Thu, Aug 27, 2009 at 09:40:06AM +0200, Gerd Hoffmann wrote:
> >>>            Or does it mean we must emulate a more recent chipset?
> >>>
> >>That too will work.
> >
> >
> >Note that if you change the chipset, it'll break some existing Windows VMs.
> I think we would rather *add* a new machine type with a new chipset, not 
> *replace* the piix3.  IIRC someone is already working on emulation 
> something more recent (ICH9?) to get some modern stuff, so that will 
> probably get us some more ioapic lines.

Yes, I'm working on q35 (gmch, ich9) chipset emulators.
I'm planning to post the (unfinished) updated patches soon for review
once I finish debugging MMCONFIG access.

I also wanted IOAPIC and more IRQs as ich9 supports 8 IRQs (IRQ A-H).
Possibly I will switch from q35 to x58(ICH10) for PCIe hotplug
however I don't have x58 based real machine at hand...


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