On Tue, Jun 15, 2021 at 03:35:16PM +0200, Christoph Hellwig wrote:

From: Jason Gunthorpe <jgg@nvidia.com>

This allows a mdev driver to opt out of using vfio_mdev.c, instead the
driver will provide a 'struct mdev_driver' and register directly with the
driver core.

Much of mdev_parent_ops becomes unused in this mode:
- create()/remove() are done via the mdev_driver probe()/remove()
- mdev_attr_groups becomes mdev_driver driver.dev_groups
- Wrapper function callbacks are replaced with the same ones from
  struct vfio_device_ops

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

Messy, but ok...

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>