On Fri, Jun 16, 2023 at 02:30:40AM -0700, Yi Liu wrote: > This allows VFIO_DEVICE_GET_PCI_HOT_RESET_INFO ioctl use the iommufd_ctx > of the cdev device to check the ownership of the other affected devices. > > When VFIO_DEVICE_GET_PCI_HOT_RESET_INFO is called on an IOMMUFD managed > device, the new flag VFIO_PCI_HOT_RESET_FLAG_DEV_ID is reported to indicate > the values returned are IOMMUFD devids rather than group IDs as used when > accessing vfio devices through the conventional vfio group interface. > Additionally the flag VFIO_PCI_HOT_RESET_FLAG_DEV_ID_OWNED will be reported > in this mode if all of the devices affected by the hot-reset are owned by > either virtue of being directly bound to the same iommufd context as the > calling device, or implicitly owned via a shared IOMMU group. > > Suggested-by: Jason Gunthorpe <jgg@xxxxxxxxxx> > Suggested-by: Alex Williamson <alex.williamson@xxxxxxxxxx> > Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx> > --- > drivers/vfio/iommufd.c | 44 ++++++++++++++++++++++++++ > drivers/vfio/pci/vfio_pci_core.c | 54 +++++++++++++++++++++++++++----- > include/linux/vfio.h | 14 +++++++++ > include/uapi/linux/vfio.h | 50 ++++++++++++++++++++++++++++- > 4 files changed, 154 insertions(+), 8 deletions(-) I would have put patch 9 before this one, but it is OK this way too Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
