> The other option for this is to having some sort of priority on the
> device probing with hotplugging.
>
> That is you can could do the following:
>
> 1) add the device vendor/model in vfio
> 2) unbind the BDF from the original driver.
> 3) hotplug happens - any new device that has the device vendor/model
> gets
> owned by vfio instead of the original device.
> 4). bind the BDF to the vfio.
>
> Granted that is a bit silly too - as the admin might want to have the new
> hotplugged device be owned by the native driver.
>
> In which case, why not just switch out from using device vendor/model
> to just using BDF values?
Did you read option #3 in my proposal-- using bus/dev/func # is
one option proposed:
> 3. "Driver initiated explicit bind" -- with this approach the
> vfio driver would create a private 'bind' sysfs object
> and the user would echo the requested device into it:
>
> echo 0001:03:00.0 > /sys/bus/pci/drivers/vfio-pci/vfio_bind
^^^^^^^^^^^^
bus/dev/func
>
> In order to make that work, the driver would need to call
> driver_probe_device() and thus we need this patch:
> https://lkml.org/lkml/2014/2/8/175
But in order to do that the vfio driver needs to call
driver_probe_device() which it can't right now without
the proposed 2 line patch...which Greg rejects.
Stuart
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