[Intel-gfx] [PATCH v5 18/19] vfio: Compile group optionally

[Jason Gunthorpe]

On Tue, Feb 28, 2023 at 06:00:09AM +0000, Liu, Yi L wrote:
> > From: Liu, Yi L <yi.l.liu at intel.com>
> > Sent: Monday, February 27, 2023 7:12 PM
> > 
> > group code is not needed for vfio device cdev, so with vfio device cdev
> > introduced, the group infrastructures can be compiled out if only cdev
> > is needed.
> > 
> > Signed-off-by: Yi Liu <yi.l.liu at intel.com>
> > ---
> >  drivers/vfio/Kconfig  | 14 +++++++++
> >  drivers/vfio/Makefile |  2 +-
> >  drivers/vfio/vfio.h   | 72
> > +++++++++++++++++++++++++++++++++++++++++++
> >  include/linux/vfio.h  | 24 ++++++++++++++-
> >  4 files changed, 110 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig
> > index 169762316513..c3ab06c314ea 100644
> > --- a/drivers/vfio/Kconfig
> > +++ b/drivers/vfio/Kconfig
> > @@ -4,6 +4,8 @@ menuconfig VFIO
> >  	select IOMMU_API
> >  	depends on IOMMUFD || !IOMMUFD
> >  	select INTERVAL_TREE
> > +	select VFIO_GROUP if SPAPR_TCE_IOMMU
> > +	select VFIO_DEVICE_CDEV if !VFIO_GROUP && (X86 || S390 || ARM || ARM64)
> 
> Got below warning when IOMMUFD=n, VFIO_GROUP=n. so may remove
> this select or needs to let VFIO_DEVICE_CDEV select IOMMUFD instead of
> depends on IOMMUFD.

Add

select VFIO_GROUP if !IOMMUFD

Jason