From: Sheng Yang <yasker@gmail.com>
To: Harald Braumann <harry@unheit.net>
Cc: kvm@vger.kernel.org, Joerg Rodel <joerg.roedel@amd.com>
Subject: Re: PCI pass-through: guest can't map memory
Date: Sun, 11 Jan 2009 12:35:12 +0800 [thread overview]
Message-ID: <20090111043512.GA23652@yukikaze> (raw)
In-Reply-To: <20090111011242.38870e46@sbs173>
On Sun, Jan 11, 2009 at 01:12:42AM +0100, Harald Braumann wrote:
> Hi!
>
> (please CC me, as I'm not subscribed)
>
> I try to give the guest (Windows XP) direct access to one of the
> graphics adaptors. However, the driver in the guest always complains:
> "Unable to map required address ranges for graphics card."
>
> Any idea what the problem could be? Attached is a kvm log with
> DEVICE_ASSIGNMENT_DEBUG = 1.
>
> This is kvm-82 on AMD64 with kernel 2.6.28.
>
Hi Harry
I think we at least have one issue here: currently we can't support graphics
card assignment... Graphics card is more complex than others due to
video bios we must support. So it's not mature now (for both KVM and Xen).
Please wait for our future releases(though I have no idea when it would be
supported, maybe several monthes or longer... :( ).
BTW: We had some experiment to assigned graphics card with Intel VT-d
engine, finally it basicly works but need some dirty hack. And we didn't put
much effort on it later.
And for AMD iommu side, I think you can ask Joerg.
--
regards
Yang, Sheng |Intel Opensource Technology Center
next prev parent reply other threads:[~2009-01-11 4:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-11 0:12 PCI pass-through: guest can't map memory Harald Braumann
2009-01-11 4:35 ` Sheng Yang [this message]
2009-01-11 13:59 ` Harald Braumann
2009-01-12 7:54 ` Sheng Yang
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