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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Mon, 01 Jun 2015 14:57:02 +0200
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Subject: Re: [Qemu-devel] [PATCH V7 23/24] apci: fix PXB behaviour if used
 with unsupported BIOS
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>, pbonzini@redhat.com, qemu-devel@nongnu.org

  Hi,

> > Devices behind pxb wouldn't be working because they didn't got resources
> > assigned, yes.
> 
> I mean that there's no way to get old seabios+pxb when bisecting.

When bisecting in qemu (with bundled seabios) yes.
But when bisection in seabios ...

Anyway, at the end of the day it doesn't matter much why exactly the
firmware didn't setup the pxb.  I think that qemu should handle that
case gracefully no matter what.

cheers,
  Gerd