Re: [RFC PATCH] PCI pass-through fixups

[Chris Wright <chrisw@sous-sol.org>]

* Sheng Yang (sheng@linux.intel.com) wrote:
> On Tuesday 07 April 2009 08:02:10 Chris Wright wrote:
> > * Alex Williamson (alex.williamson@hp.com) wrote:
> > > I'm wondering if we need a spot for device specific fixups for PCI
> > > pass-through.  In the example below, I want to expose a single port of
> > > an Intel 82571EB quad port copper NIC to a guest.  It works great until
> > > I shutdown the guest, at which point the guest e1000e driver knows by
> > > the device ID that the NIC is a quad port, and blindly attempts to
> > > twiddle some bits on the bridge above it (that doesn't exist).
> >
> > And what happens?
> 
> And the output of DEVICE_ASSIGNMENT_DEBUG=1 may help. And I don't have trouble 
> here with another dual/quad port card by Intel, but not 82571EB. 

Right, it's driver dependent.  I too can assign a single port w/out
trouble.  I'm assuming the guest just complains at rmmod?

thanks,
-chris