Re: [PATCH v3 15/16] iommu: introduce page response function

[Jean-Philippe Brucker]

On 07/12/17 21:51, Alex Williamson wrote:
>> Agree, IOMMU driver cannot enforce it. I think VFIO layer can make sure
>> page response come from the assigned device and its guest/container.
> 
> Can we enforce it via the IOMMU/VFIO interface?  If the response is for
> a struct device, and not an rid/did embedded in a structure, then vfio
> can pass it through w/o worrying about it, ie. response comes in via
> ioctl with association to vfio device fd -> struct vfio_device -> struct
> device, iommu driver fills in rid/did.  Thanks,

Yes that's probably the best way, reporting faults and receiving responses
on the device fd.

Thanks,
Jean