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

Avi Kivity
2010-07-11T18:17:32Z

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.