[Intel-gfx] [PATCH v5 01/10] vfio-iommufd: Create iommufd_access for noiommu devices

[Alex Williamson]

On Thu, 18 May 2023 12:23:29 +0000
"Liu, Yi L" <yi.l.liu at intel.com> wrote:

> > From: Jason Gunthorpe <jgg at nvidia.com>
> > Sent: Thursday, May 18, 2023 2:21 AM
> > 
> > On Wed, May 17, 2023 at 11:26:09AM -0600, Alex Williamson wrote:
> >   
> > > It's not clear to me why we need a separate iommufd_access for
> > > noiommu.  
> > 
> > The point was to allocate an ID for the device so we can use that ID
> > with the other interfaces in all cases.  
> 
> I guess Alex's question is why adding a new pointer named noiommu_access
> while there is already the iommufd_access pointer named iommufd_access.

Yes, precisely.  Sorry that was confusing, we need the access for
noiommu but it's not clear why that access needs to be stored in a
separate pointer when we can already differentiate noiommu devices
otherwise.  Thanks,

Alex