> From: Jason Gunthorpe <jgg@xxxxxxxxxx> > Sent: Wednesday, September 22, 2021 12:01 AM > > > One open about how to organize the device nodes under > /dev/vfio/devices/. > > This RFC adopts a simple policy by keeping a flat layout with mixed > devname > > from all kinds of devices. The prerequisite of this model is that devnames > > from different bus types are unique formats: > > This isn't reliable, the devname should just be vfio0, vfio1, etc > > The userspace can learn the correct major/minor by inspecting the > sysfs. > > This whole concept should disappear into the prior patch that adds the > struct device in the first place, and I think most of the code here > can be deleted once the struct device is used properly. > Can you help elaborate above flow? This is one area where we need more guidance. When Qemu accepts an option "-device vfio-pci,host=DDDD:BB:DD.F", how does Qemu identify which vifo0/1/... is associated with the specified DDDD:BB:DD.F? Thanks Kevin
