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xen-devel
Re: [Xen-devel] Domain 0 hardware problem with nForce2 AGP?
We don't support agpgart at the moment.
IIRC, the agpgart driver needs to write to some PCI config-space registers,
which Xen currently disallows. The output you've posted suggests it also
needs to see some special bridges too. Xen hides bridge devices from dom0
because for all other purposes, it's not necessary to reveal them.
It may not be too hard to get arggart working (although it's unlikely to
happen for 2.0). If you (or anyone else) is interested in playing around
with this, we'd provide support. It seems likely that someone here will get
round to implementing this eventually though...
Mark
On Monday 25 Oct 2004 01:14, Nuutti Kotivuori wrote:
> On a real kernel boot, I get:
>
> agpgart: Detected NVIDIA nForce2 chipset
> agpgart: Maximum main memory to use for agp memory: 816M
> agpgart: AGP aperture is 256M @ 0xc0000000
>
> On a xen kernel boot, I get:
>
> agpgart: Detected an NVIDIA nForce/nForce2 chipset, but could not find
> the secondary devices.
>
> If I look at lspci listings, there are two entries missing in the Xen
> kernel version:
>
> 0000:00:08.0 PCI bridge: nVidia Corporation nForce2 External PCI Bridge
> (rev a3) 0000:00:1e.0 PCI bridge: nVidia Corporation nForce2 AGP (rev a2)
>
> Now, I am asking, should this work? Do I have a snag in my configs? Or
> if it shouldn't work, should Xen be fixed or should the nForce AGP
> driver be fixed? Or am I totally missing something?
>
> -- Naked
>
>
>
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