On Tue, 2016-01-12 at 15:06 -0700, Alex Williamson wrote:
> We already have a solution in the kernel for this, it's the
> driver_override interface. Rather than your above example of adding
> a
> new ID to the dynamic list for the driver, such that it will
> automatically probe the device, we reverse the process to allow the
> device to match the driver. The sequence becomes:
>
> echo vfio-pci > /sys/bus/pci/devices/<pci address>/driver_override
> echo <pci address> > /sys/bus/pci/drivers/<old driver>/unbind
> echo <pci address> /sys/bus/pci/drivers_probe
>
> The old interface is kept around because there are quite a few users
> of
> it, some of which would be broken by the proposed manual_bind_only
> code
> change, including the example of using driver_override above. This
> also avoids even the need for pci-stub (which has the same issue),
> since we can simply put a dummy name in driver_override to avoid a
> device from matching any driver. Thanks,
>
> Alex
Hmm, that makes sense. So really I should see about getting the tools
which currently use the old interface to use a new one?
(Don't we still want/need vfio-pci for other reasons besides just being
a stub driver?)
Regards,
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