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Date: Tue, 26 Nov 2013 09:12:50 +0100
From: Laszlo Ersek <lersek@redhat.com>
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Subject: Re: [Qemu-devel] [PULL for-1.8 1/2] pc: disable pci-info
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>, "Jordan Justen (Intel address)" <jordan.l.justen@intel.com>, qemu-devel@nongnu.org, Gerd Hoffmann <kraxel@redhat.com>, Anthony Liguori <aliguori@amazon.com>, Igor Mammedov <imammedo@redhat.com>

On 11/18/13 12:53, Michael S. Tsirkin wrote:
> From: Igor Mammedov <imammedo@redhat.com>
> 
> The BIOS that we ship in 1.7 does not use pci info
> from host and so far isn't going to use it.
> Taking in account problems it caused see 9604f70fdf and
> to avoid future incompatibility issues, it's safest to
> disable that interface by default for all machine types
> including 1.7 as it was never exposed/used by guest.
> And properly remove/cleanup it during 1.8 development cycle.
> 
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
>  hw/i386/pc_piix.c | 2 +-
>  hw/i386/pc_q35.c  | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)

etc/pci-info is precisely the form and contents that OVMF needs to
download ACPI tables from qemu.

<http://sourceforge.net/mailarchive/forum.php?thread_name=1385450282-27007-3-git-send-email-lersek%40redhat.com&forum_name=edk2-devel>

Please keep this exported in 1.8, for OVMF's sake.

Thanks
Laszlo