On Mon, Oct 23, 2023 at 10:09:13AM -0600, Alex Williamson wrote: > On Mon, 23 Oct 2023 12:42:57 -0300 > Jason Gunthorpe <jgg@xxxxxxxxxx> wrote: > > > On Mon, Oct 23, 2023 at 09:33:23AM -0600, Alex Williamson wrote: > > > > > > Alex, > > > > Are you fine to leave the provisioning of the VF including the control > > > > of its transitional capability in the device hands as was suggested by > > > > Jason ? > > > > > > If this is the standard we're going to follow, ie. profiling of a > > > device is expected to occur prior to the probe of the vfio-pci variant > > > driver, then we should get the out-of-tree NVIDIA vGPU driver on board > > > with this too. > > > > Those GPU drivers are using mdev not vfio-pci.. > > The SR-IOV mdev vGPUs rely on the IOMMU backing device support which > was removed from upstream. It wasn't, but it changed forms. mdev is a sysfs framework for managing lifecycle with GUIDs only. The thing using mdev can call vfio_register_emulated_iommu_dev() or vfio_register_group_dev(). It doesn't matter to the mdev stuff. The thing using mdev is responsible to get the struct device to pass to vfio_register_group_dev() Jason
