[Qemu-devel] Re: [RFC PATCH 0/5] QEMU VFIO device assignment

[Michael S. Tsirkin]

On Mon, Jul 12, 2010 at 09:29:38AM +0300, Avi Kivity wrote:
> On 07/11/2010 11:24 PM, Alex Williamson wrote:
> >
> >One other thing to be aware of is that vfio requires devices to be
> >PCI-2.3 compliant in order to support DisINTx.  This allows vfio to
> >support devices making use of shared INTx interrupts, but excludes older
> >devices that users maybe managed to get assigned to an exclusive
> >interrupt for kvm style assignment.
> >
> >I suppose we might be able to make vfio work with either pci 2.3 devices
> >or older devices with exclusive interrupts if that ends up affecting
> >many users.
> 
> PCI 2.3 is already old enough (6-7 years?)

I believe it was made a standard in 2002.

> that I believe we can require it.
> 
> -- 
> I have a truly marvellous patch that fixes the bug which this
> signature is too narrow to contain.