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Re: [Qemu-devel] virtio-blk/qdev failure in the current git tree


From: Gerd Hoffmann
Subject: Re: [Qemu-devel] virtio-blk/qdev failure in the current git tree
Date: Wed, 12 Aug 2009 12:19:38 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2

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





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