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From: Peter Maydell <peter.maydell@linaro.org>
Date: Mon, 2 Sep 2013 15:43:50 +0100
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Subject: Re: [Qemu-devel] [PATCH RFC 0/3] pci: complete master abort protocol
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To: Marcel Apfelbaum <marcel.a@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>, Anthony Liguori <aliguori@us.ibm.com>, QEMU Developers <qemu-devel@nongnu.org>, =?UTF-8?Q?Andreas_F=C3=A4rber?= <afaerber@suse.de>, "Michael S. Tsirkin" <mst@redhat.com>

On 2 September 2013 15:39, Marcel Apfelbaum <marcel.a@redhat.com> wrote:
> On Mon, 2013-09-02 at 15:30 +0100, Peter Maydell wrote:
>> On 2 September 2013 15:13, Marcel Apfelbaum <marcel.a@redhat.com> wrote:
>> > Note: The series is incomplete, for review only
>> >
>> > PCI spec requires that a transaction that has not been claimed
>> > by any PCI bus devices will be terminated by the initiator
>> > with "master abort". For read transactions -1(FFFFFFFF) is returned and
>> > writes are silently dropped. (already implemented in quemu)
>>
>> ...but only erroneously and by breaking a pile of other boards.
> :(
> Let's find a way to fix it... Please suggest

We need to apply Jan's two patches which revert the breakage
and give us back 1.5 behaviour for unassigned memory.
Then you can work on this patchset and we can commit it
when it works OK.

-- PMM