On 11/24/2016 05:41 PM, Markus Armbruster wrote:
Marcel Apfelbaum <marcel@xxxxxxxxxx> writes:
On 11/24/2016 03:34 PM, Markus Armbruster wrote:
Eduardo Habkost <ehabkost@xxxxxxxxxx> writes:
On Wed, Nov 23, 2016 at 06:43:16PM +0200, Marcel Apfelbaum wrote:
On 11/22/2016 03:11 AM, Eduardo Habkost wrote:
The Problem
[...]
Our decision to have hybrid PCI/PCIe devices and buses breeds
considerable complexity. I wish we had avoided them, but I believe it's
too late to change now.
This still does not solve the problem that some devices makes
sense only on a specific arch.
Hi Markus,
Examples?
One quick example would be that we don't want to see
Intel's IOH 3420 PCIe Root Port in an ARM machine,
or a pxb on a Q35 machine (in this case we want pxb-pcie)
Such a device would be weird. But would it be wrong?
Define wrong :)
Wrong enough for
QEMU to reject it?
QEMU accepts them and they even function correctly as far as I know.
Unless QEMU rejects it, there's no reason not to
list it as pluggable.
This is the gray area I can't argue. I do think that Eduardo's
work may present an opportunity to change QEMU's mantra:
"everything goes as long as it works" to "here is what this configuration supports".
Thanks,
Marcel
I do believe there are other examples, I'll try to think of more.
Thanks,
Marcel
[...]
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