Re: [PATCH 8/9] vfio/pci: use x86 naming instead of igd

[Jason Gunthorpe]

On Thu, Feb 04, 2021 at 12:05:22PM +1100, Alexey Kardashevskiy wrote:

> It is system firmware (==bios) which puts stuff in the device tree. The
> stuff is:
> 1. emulated pci devices (custom pci bridges), one per nvlink, emulated by
> the firmware, the driver is "ibmnpu" and it is a part on the nvidia driver;
> these are basically config space proxies to the cpu's side of nvlink.
> 2. interconnect information - which of 6 gpus nvlinks connected to which
> nvlink on the cpu side, and memory ranges.

So what is this vfio_nvlink driver supposed to be bound to? 

The "emulated pci devices"?

A real GPU function?

A real nvswitch function?

Something else?

Jason