> From: Jason Gunthorpe <jgg@xxxxxxxxxx> > Sent: Tuesday, October 10, 2023 9:37 PM > > On Tue, Oct 10, 2023 at 12:03:29PM -0400, Michael S. Tsirkin wrote: > > On Tue, Oct 10, 2023 at 12:59:37PM -0300, Jason Gunthorpe wrote: > > > On Tue, Oct 10, 2023 at 11:14:56AM -0400, Michael S. Tsirkin wrote: > > > > > > > I suggest 3 but call it on the VF. commands will switch to PF > > > > internally as needed. For example, intel might be interested in > > > > exposing admin commands through a memory BAR of VF itself. If in the future if one does admin command on the VF memory BAR, there is no need of cast either. vfio-virtio-pci driver can do on the pci vf device directly. (though per VF memory registers would be anti-scale design for real hw; to discuss in other forum).