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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Fri, 24 Jul 2015 07:46:55 +1000
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Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH v2] pci: allow 0 address for PCI
 IO/MEM regions
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Laurent Vivier <lvivier@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Michael Roth <mdroth@linux.vnet.ibm.com>, QEMU Developers <qemu-devel@nongnu.org>, "qemu-ppc@nongnu.org" <qemu-ppc@nongnu.org>, David Gibson <david@gibson.dropbear.id.au>

On Thu, 2015-07-23 at 22:00 +0100, Peter Maydell wrote:
> (Also, none of our PCI device models actually try to do
> the "BAR at zero means I won't respond" behaviour, which
> presumably they might do in real life.)

Devices aren't supposed to do that ... In fact, I don't see HW designers
adding a comparator if they don't have to :-)

Cheers,
Ben.