On Mon, 13 Feb 2023 07:13:36 -0800 Yi Liu <yi.l.liu@xxxxxxxxx> wrote: > This makes the vfio file kAPIs to accepte vfio device files, also a > preparation for vfio device cdev support. > > For the kvm set with vfio device file, kvm pointer is stored in struct > vfio_device_file, and use kvm_ref_lock to protect kvm set and kvm > pointer usage within VFIO. This kvm pointer will be set to vfio_device > after device file is bound to iommufd in the cdev path. > > Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx> > Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx> > --- > drivers/vfio/vfio.h | 2 ++ > drivers/vfio/vfio_main.c | 51 ++++++++++++++++++++++++++++++++++++---- > 2 files changed, 49 insertions(+), 4 deletions(-) This subtly changes the behavior of the vfio-pci hot reset functions without updating the uAPI description or implementation to use less group-centric variables. The new behavior appears to be that cdev fds can also be passed to prove ownership of the affected set of devices for a hot reset, but this probably needs to be examined for gaps. Thanks, Alex
