[Intel-gfx] [PATCH v5 02/19] vfio: Refine vfio file kAPIs for KVM

[Jason Gunthorpe]

On Mon, Feb 27, 2023 at 03:11:18AM -0800, Yi Liu wrote:
> This prepares for making the below kAPIs to accept both group file
> and device file instead of only vfio group file.
> 
>   bool vfio_file_enforced_coherent(struct file *file);
>   void vfio_file_set_kvm(struct file *file, struct kvm *kvm);
> 
> Besides the above change, vfio_file_is_valid() is added to check if a
> given file is a valid vfio file. It would be extended to check both
> vfio group file and vfio device file later.
> 
> vfio_file_is_group() is kept to for the VFIO PCI hot reset path.
> 
> Signed-off-by: Yi Liu <yi.l.liu at intel.com>
> Reviewed-by: Kevin Tian <kevin.tian at intel.com>
> Reviewed-by: Eric Auger <eric.auger at redhat.com>
> ---
>  drivers/vfio/group.c     | 57 +++++++++++++++-------------------------
>  drivers/vfio/vfio.h      |  3 +++
>  drivers/vfio/vfio_main.c | 45 +++++++++++++++++++++++++++++++
>  include/linux/vfio.h     |  1 +
>  virt/kvm/vfio.c          | 10 +++----
>  5 files changed, 75 insertions(+), 41 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Jason