On Mon, Jun 14 2021, Christoph Hellwig [off-list ref] 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>
---
 drivers/vfio/mdev/mdev_core.c   | 30 ++++++++++++++++++++++--------
 drivers/vfio/mdev/mdev_driver.c | 10 ++++++++++
 include/linux/mdev.h            |  2 ++
 3 files changed, 34 insertions(+), 8 deletions(-)

Reviewed-by: Cornelia Huck <cohuck@redhat.com>