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

[Avi Kivity]

On 07/11/2010 09:09 PM, Alex Williamson wrote:
> The following series implements QEMU device assignment using the
> proposed VFIO/UIOMMU kernel interfaces.  See the last patch for
> further vfio description.  I've tested this on the v2 VFIO patch,
> with a number of fixes hacked in along the way.  I'll update when
> Tom releases a new version of VFIO.  Hopefully this will provide
> some support for the usefulness of such an interfaces.  Thanks,
>
>    

What's the plan for supporting this alongside the existing kvm device 
assignment code?

vfio will only exist in very new kernels, so we have to support the old 
code for a while to give people chance to adjust (say 12-18 months).  
Ideally we'd have compatible command line syntax with qemu choosing vfio 
if available and falling back to kvm device assignment if not.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.