From: "Michael S. Tsirkin" <mst@redhat.com>
To: Alexey Korolev <alexey.korolev@endace.com>
Cc: sfd@endace.com, seabios@seabios.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [BUG] [Seabios] PCI 64bit BARs on Win2008 - unable to start the device. (ACPI lacks the _DSM method)
Date: Wed, 30 Nov 2011 09:49:04 +0200 [thread overview]
Message-ID: <20111130074903.GD17781@redhat.com> (raw)
In-Reply-To: <4ED58108.3090903@endace.com>
On Wed, Nov 30, 2011 at 02:04:08PM +1300, Alexey Korolev wrote:
> Hi,
>
> We have got some issues with 64bit PCI devices support under Windows guests.
> Windows fails to start any PCI devices with 64bit BARs when size
> exceeds 512MB with error code 12 (can't allocate resources). In
> other words it fails when the PCI memory region is located above
> 4GB.
>
> I tried to investigate this problem and found document from Microsoft:
> http://msdn.microsoft.com/en-us/windows/hardware/gg462986
>
> It states that the _DSM method must be implemented to support
> devices above 4GB.
That's not how I read it:
Windows Vista always respects the boot configuration of devices above
4 GB, considering the processor’s addressing capability and the version
of the Windows operating system that is running.
> Unfortunately I'm not familiar with ACPI code of seabios, so can't
> implement the _DSM method. May be you have other ideas what needs to
> be done to fix it? Any help is appreciated.
>
> Thanks,
> Alexey
Could you share some more detail about your setup?
--
MST
next prev parent reply other threads:[~2011-11-30 7:48 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-30 1:04 [Qemu-devel] [BUG] [Seabios] PCI 64bit BARs on Win2008 - unable to start the device. (ACPI lacks the _DSM method) Alexey Korolev
2011-11-30 7:49 ` Michael S. Tsirkin [this message]
2011-12-01 5:19 ` Alexey Korolev
2011-12-01 11:25 ` Gerd Hoffmann
2011-12-01 11:41 ` Gerd Hoffmann
2011-12-05 4:29 ` Alexey Korolev
2011-12-12 8:10 ` Gerd Hoffmann
2011-12-13 4:19 ` Alexey Korolev
2011-12-14 4:30 ` Alexey Korolev
2011-12-14 5:10 ` Kevin O'Connor
2011-12-15 8:48 ` Gerd Hoffmann
2011-12-16 4:41 ` Alexey Korolev
2011-12-16 9:23 ` Gerd Hoffmann
2011-12-01 5:49 ` Alexey Korolev
2011-12-01 10:17 ` Michael S. Tsirkin
2011-12-05 4:20 ` Alexey Korolev
2011-12-05 6:31 ` Michael S. Tsirkin
2011-12-06 4:23 ` Alexey Korolev
2011-12-13 11:11 ` [Qemu-devel] [SeaBIOS] " Gerd Hoffmann
2011-12-14 4:31 ` Alexey Korolev
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