Re: [PATCH] uio/uio_pci_generic: Add SR-IOV support

[Don Dutile]

On 09/28/2017 11:52 AM, David Woodhouse wrote:
> On Thu, 2017-09-28 at 11:05 -0400, Don Dutile wrote:
> > ah, nickel summary: no in-kernel driver w/.sriov-configure method.
> > if so, now I'm up to speed with you....
> > hmmmm....
> > so, that would imply we need an in-kernel, pcie-common, .sriov-
> > configure method
> > that's invoked if a driver isn't bound to a device? ... yes?
>
> Well that was kind of the point in my question below the ---
>
> Is that something we want to be generic? Would we want to have quirks
> for the devices where we might *not* want it?
>
> Anything that *has* a driver for the PF, should have .sriov_configure
> already. Anything that doesn't have a driver can (now) use UIO to
> enable SR-IOV. So we don't *have* to make it unconditionally
> available...
Well, my point is more like: why put it in uio?
why not make it available via pcie, setup while/if no driver attached?
i.e., other non-uio users can use the mechanism.... like libvirt? ...
if a PF driver isn't required.