On 9/30/25 5:26 PM, Alexandre Courbot wrote: > On Wed Oct 1, 2025 at 7:07 AM JST, John Hubbard wrote: >> Post-Kangrejos, the approach for NovaCore + VFIO has changed a bit: the >> idea now is that VFIO drivers, for NVIDIA GPUs that are supported by >> NovaCore, should bind directly to the GPU's VFs. (An earlier idea was to >> let NovaCore bind to the VFs, and then have NovaCore call into the upper >> (VFIO) module via Aux Bus, but this turns out to be awkward and is no >> longer in favor.) So, in order to support that: >> >> Nova-core must only bind to Physical Functions (PFs) and regular PCI >> devices, not to Virtual Functions (VFs) created through SR-IOV. > > Naive question: will guests also see the passed-through VF as a VF? If > so, wouldn't this change also prevents guests from using Nova?
I'm also new to this area. I would expect that guests *must* see these as PFs, otherwise...nothing makes any sense. Maybe Alex Williamson or Jason Gunthorpe (+CC) can chime in. thanks, -- John Hubbard
