simplify the mdev interface v6

[Alex Williamson]

On Mon, 18 Jul 2022 07:43:48 +0200
Christoph Hellwig <hch at lst.de> wrote:

> Alex, does this series look good to you now?

It does.  I was hoping we'd get a more complete set acks from the mdev
driver owners, but I'll grab this within the next day or two with
whatever additional reviews come in by then.  Thanks,

Alex

> On Sat, Jul 09, 2022 at 06:54:36AM +0200, Christoph Hellwig wrote:
> > Hi all,
> > 
> > this series signigicantly simplies the mdev driver interface by following
> > the patterns for device model interaction used elsewhere in the kernel.
> > 
> > Changes since v5:
> >  - rebased to the latest vfio/next branch
> >  - drop the last patch again
> >  - make sure show_available_instances works properly for the internallly
> >    tracked case
> > 
> > Changes since v4:
> >  - move the kobject_put later in mdev_device_release 
> >  - add a Fixes tag for the first patch
> >  - add another patch to remove an extra kobject_get/put
> > 
> > Changes since v3:
> >  - make the sysfs_name and pretty_name fields pointers instead of arrays
> >  - add an i915 cleanup to prepare for the above
> > 
> > Changes since v2:
> >  - rebased to vfio/next
> >  - fix a pre-existing memory leak in i915 instead of making it worse
> >  - never manipulate if ->available_instances if drv->get_available is
> >    provided
> >  - keep a parent reference for the mdev_type
> >  - keep a few of the sysfs.c helper function around
> >  - improve the documentation for the parent device lifetime
> >  - minor spellig / formatting fixes
> > 
> > Changes since v1:
> >  - embedd the mdev_parent into a different sub-structure in i916
> >  - remove headers now inclued by mdev.h from individual source files
> >  - pass an array of mdev_types to mdev_register_parent
> >  - add additional patches to implement all attributes on the
> >    mdev_type in the core code
> > 
> > Diffstat:
> >  Documentation/driver-api/vfio-mediated-device.rst |   26 +-
> >  Documentation/s390/vfio-ap.rst                    |    2 
> >  Documentation/s390/vfio-ccw.rst                   |    2 
> >  drivers/gpu/drm/i915/gvt/aperture_gm.c            |   20 +-
> >  drivers/gpu/drm/i915/gvt/gvt.h                    |   42 ++--
> >  drivers/gpu/drm/i915/gvt/kvmgt.c                  |  168 ++++-------------
> >  drivers/gpu/drm/i915/gvt/vgpu.c                   |  210 +++++++---------------
> >  drivers/s390/cio/cio.h                            |    4 
> >  drivers/s390/cio/vfio_ccw_drv.c                   |   12 -
> >  drivers/s390/cio/vfio_ccw_ops.c                   |   51 -----
> >  drivers/s390/cio/vfio_ccw_private.h               |    2 
> >  drivers/s390/crypto/vfio_ap_ops.c                 |   68 +------
> >  drivers/s390/crypto/vfio_ap_private.h             |    6 
> >  drivers/vfio/mdev/mdev_core.c                     |  190 ++++---------------
> >  drivers/vfio/mdev/mdev_driver.c                   |    7 
> >  drivers/vfio/mdev/mdev_private.h                  |   32 ---
> >  drivers/vfio/mdev/mdev_sysfs.c                    |  189 ++++++++++---------
> >  include/linux/mdev.h                              |   77 ++++----
> >  samples/vfio-mdev/mbochs.c                        |  103 +++-------
> >  samples/vfio-mdev/mdpy.c                          |  115 +++---------
> >  samples/vfio-mdev/mtty.c                          |   94 +++------
> >  21 files changed, 463 insertions(+), 957 deletions(-)  
> ---end quoted text---
>