Re: [RFC] /dev/ioasid uAPI proposal

Lu Baolu
2021-06-01T03:10:10Z

On 6/1/21 2:09 AM, Jason Gunthorpe wrote:
>>> device bind should fail if the device somehow isn't compatible with
>>> the scheme the user is tring to use.
>> yeah, I guess you mean to fail the device attach when the IOASID is a
>> nesting IOASID but the device is behind an iommu without nesting support.
>> right?
> Right..
>

Just want to confirm...

Does this mean that we only support hardware nesting and don't want to
have soft nesting (shadowed page table in kernel) in IOASID?

Best regards,
baolu