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From: Andrea Bolognani <abologna@redhat.com>
Date: Fri, 25 Nov 2016 14:48:33 +0100
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Subject: Re: [Qemu-devel] [PATCH for-2.9 0/3] hw/pcie: Introduce Generic PCI
 Express Root Port
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To: Marcel Apfelbaum <marcel@redhat.com>, qemu-devel@nongnu.org
Cc: mst@redhat.com, laine@redhat.com, drjones@redhat.com

On Wed, 2016-11-23 at 14:02 +0200, Marcel Apfelbaum wrote:
> The Generic Root Port behaves the same as the
> Intel's IOH device with id 3420, without having
> Intel specific attributes.
>=C2=A0
> The device has two purposes:
>=C2=A0=C2=A0(1) Can be used on both X86 and ARM machines.
>=C2=A0=C2=A0(2) It will allow us to tweak the behaviour
>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0(e.g add vendor-specific PCI capabilities)
>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0- something that obviously cannot be=
 done
>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0on a known device.
>=C2=A0
> Patch 1/3: Introduce a base class for Root Ports - most of the code
>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
is migrated from IOH3420 implementation.
> Patch 2/3: Derives the IOH3420 from the new base class
> Patch 3/3: Introduces the generic Root Port.
>=C2=A0
> Tested with Linux and Windows guests only on x86 hosts.

Thanks for your work on this! I will give it a go on aarch64
in a couple of weeks, if nobody beats me to it :)

--=C2=A0
Andrea Bolognani / Red Hat / Virtualization