Re: [PATCH v4 00/17] Add VFIO mediated device support and DEV-MSI support for the idxd driver

[Jason Gunthorpe]

On Fri, Oct 30, 2020 at 11:50:47AM -0700, Dave Jiang wrote:
>  .../ABI/stable/sysfs-driver-dma-idxd          |    6 +
>  Documentation/driver-api/vfio/mdev-idxd.rst   |  404 ++++++
>  MAINTAINERS                                   |    1 +
>  drivers/dma/Kconfig                           |    9 +
>  drivers/dma/idxd/Makefile                     |    2 +
>  drivers/dma/idxd/cdev.c                       |    6 +-
>  drivers/dma/idxd/device.c                     |  294 ++++-
>  drivers/dma/idxd/idxd.h                       |   67 +-
>  drivers/dma/idxd/init.c                       |   86 ++
>  drivers/dma/idxd/irq.c                        |    6 +-
>  drivers/dma/idxd/mdev.c                       | 1121 +++++++++++++++++
>  drivers/dma/idxd/mdev.h                       |  116 ++

Again, a subsytem driver belongs in the directory hierarchy of the
subsystem, not in other random places. All this mdev stuff belongs
under drivers/vfio

Jason