On Wed, Mar 04, 2026 at 10:47:50AM +0200, Leon Romanovsky wrote: > On Tue, Mar 03, 2026 at 04:15:20PM -0500, Peter Colberg wrote: > > Add Rust abstractions for the Single Root I/O Virtualization (SR-IOV) > > capability of a PCI device. Provide a minimal set of wrappers for the > > SR-IOV C API to enable and disable SR-IOV for a device, and query if > > a PCI device is a Physical Function (PF) or Virtual Function (VF). > > <...> > > > For PF drivers written in C, disabling SR-IOV on remove() may be opted > > into by setting the flag managed_sriov in the pci_driver structure. For > > PF drivers written in Rust, disabling SR-IOV on unbind() is mandatory. > > Why? Could you explain the rationale behind this difference between C and > Rust? Let me remind you that SR‑IOV devices which do not disable VFs do so > for a practical and well‑established reason: maximizing hardware > utilization.
Personally I think drivers doing this are wrong. That such a driver bug was allowed to become UAPI is pretty bad. The rust approach is better. Jason
