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Date: Mon, 9 Sep 2013 16:59:48 +0300
From: "Michael S. Tsirkin" <mst@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>, Anthony Liguori <aliguori@us.ibm.com>, Jan Kiszka <jan.kiszka@siemens.com>, QEMU Developers <qemu-devel@nongnu.org>, Marcel Apfelbaum <marcel.a@redhat.com>

On Mon, Sep 09, 2013 at 02:02:47PM +0100, Peter Maydell wrote:
> On 9 September 2013 13:59, Michael S. Tsirkin <mst@redhat.com> wrote:
> > On Mon, Sep 09, 2013 at 01:52:11PM +0100, Peter Maydell wrote:
> >> It would be conceptually nicer not to treat host bridges as
> >> a special case but instead to just report the abort back
> >> to whatever the PCI master was (which might be a device
> >> doing DMA). That might be a lot of effort though.
> 
> > Yes. As a shortcut, what I suggest is registering the
> > device that wants to be notified of master aborts with
> > the bus.
> 
> Can you just pick the device which is (a subclass of)
> TYPE_PCI_HOST_BRIDGE, or do we have host bridges which
> aren't using that class?
> 
> -- PMM

Not anymore I think. So yes, I think this will work.