[PATCH 07/10] vfio/mdev: Allow the mdev_parent_ops to specify the device driver to bind

[Cornelia Huck]

On Mon, Jun 14 2021, Christoph Hellwig <hch at lst.de> wrote:

> From: Jason Gunthorpe <jgg at 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 at nvidia.com>
> Signed-off-by: Christoph Hellwig <hch at 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 at redhat.com>