Allow mdev drivers to directly create the vfio_device (v4)

[Jason Gunthorpe]

On Thu, Jun 17, 2021 at 04:22:08PM +0200, Christoph Hellwig wrote:
> This is my alternative take on this series from Jason:
> 
> https://lore.kernel.org/dri-devel/87czsszi9i.fsf@redhat.com/T/
> 
> The mdev/vfio parts are exactly the same, but this solves the driver core
> changes for the direct probing without the in/out flag that Greg hated,
> which cause a little more work, but probably make the result better.

I did some testing and it looks good, thanks

I see Alex has this in hch-mdev-direct-v4 in linux-next now, so
expecting this to be in the next merge window?

The AP prep patches seemed sorted so I'll resend the AP patch in three
weeks

Jason