On Wed Oct 1, 2025 at 10:26 AM JST, John Hubbard wrote: > 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.
But if the guest sees the passed-through VF as a PF, won't it try to do things it is not supposed to do like loading the GSP firmware (which is managed by the host)?
