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Date: Wed, 12 Aug 2009 12:19:38 +0200
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] virtio-blk/qdev failure in the current git tree
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To: Avi Kivity <avi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>, qemu-devel@nongnu.org

On 08/12/09 12:00, Avi Kivity wrote:
> On 08/12/2009 12:26 PM, Gerd Hoffmann wrote:
>> On 08/11/09 21:28, Gerd Hoffmann wrote:
>>> Hmm. I suspect this is not related to qdev and virtio-blk at all. I've
>>> noticed now and then that some pci devices don't work if you have many
>>> of them. Didn't try (yet) to root-cause that one.
>>
>> More testing: Bare virtual box with just piix+vga. Then place a virtio
>> disk into different slots using addr=. 3,4,5 work fine. 6 gives me:
>>
>> ACPI: Unable to derive IRQ for device 0000:00:06.0
>> ACPI: PCI Interrupt 0000:00:06.0[A]: no GSI - using IRQ 9
>> vda: <hangs here>
>>
>> Looks like a irq routing issue ...
>
> What about qemu-kvm.git (and its bios)?

Works:

ACPI: PCI Interrupt 0000:00:06.0[A] -> Link [LNKB] -> GSI 10 (level, 
high) -> IRQ 10

cheers,
   Gerd