Issues with getting PCI pass-through to work

[Adhyas Avasthi <adhyas@gmail.com>]

I have a PCI WLAN controller that I wish to pass-through to the
standard linux-img VM (downloaded from qemu website).
When I try "qemu-kvm -pcidevice host=0c:00.0,name=abcd linux-0.2.img"
The VM does boot up but does not see the device.

On the command prompt, I see the following message:
Failed to assign irq for "abcd": Operation not supported
Perhaps you are assigning a device that shares an IRQ with another device?

I want to know what does this message exactly mean? Is PCI
pass-through having the requirement of reconfiguring the IRQ of my
host devices before I can pass them through? Can I configure qemu-kvm
somehow to emulate the IRQ (and other registers) instead of trying to
pass-through the IRQ etc?

BTW, my box has VT and VT-d enabled in BIOS.

--
Adhyas
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