Mailing List Archive: agpgart and i830M Chipset problem

agpgart and i830M Chipset problem

Nov 8, 2004, 7:15 AM

Post #1 of 5 (252 views)

Hi,
here's a bit from dmesg:

Linux agpgart interface v0.99 (c) Jeff Hartmann
agpgart: Maximum main memory to use for agp memory: 150M
agpgart: Detected an Intel(R) 830M Chipset.
invalid operand: 0000
CPU: 0
EIP: 0819:[<c022d22c>] Not tainted
EFLAGS: 00213207
eax: c04f6000 ebx: c04f6ca0 ecx: 01000000 edx: 00000328
esi: 00000000 edi: 00000000 ebp: 00000001 esp: ca871e88
ds: 0821 es: 0821 ss: 0821
Process modprobe.moduti (pid: 292, stackpage=ca871000)<1>
Stack: 00000001 c0406540 c01233fb ca364000 c11c154c 00000000 00000000 00000001
c022d52e c11c154c 00000073 ca871eb8 00000000 c11c154c 00000000 00000000
00000000 cc46ffe5 c11c154c 00000001 00000073 00000063 cc473e96 ca871f14
Call Trace: [<c01233fb>] [<c022d52e>] [<cc46ffe5>]
[<cc473e96>] [<cc474000>] [<cc474ec0>] [<c010a030>] [<cc46e060>] [<c022481f>]

this happens with 2.4.27-based xen0, with non-xen enabled 2.4.27 everything
is fine.
Should I expect problems on other agpgart modules ( for example, are
radeons known to work? ).

--
Dariush Pietrzak,
Key fingerprint = 40D0 9FFB 9939 7320 8294 05E0 BCC7 02C4 75CC 50D9

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Re: agpgart and i830M Chipset problem [ In reply to ]

Keir.Fraser at cl

Nov 8, 2004, 7:31 AM

Post #2 of 5 (247 views)

Permalink

> this happens with 2.4.27-based xen0, with non-xen enabled 2.4.27 everything
> is fine.
> Should I expect problems on other agpgart modules ( for example, are
> radeons known to work? ).

Yes -- agapgart is currently broken for Xen 2.4 and 2.6 kernels. We're
planning to fix XenLinux-2.6 but are unlikely to put in the effort for
2.4.

-- Keir

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Re: agpgart and i830M Chipset problem [ In reply to ]

sd386 at cam

Nov 8, 2004, 7:34 AM

Post #3 of 5 (247 views)

Permalink

I believe agpgart is not yet working in Xen...
But I'm going to have a closer look at that in the near future.

Cheers,
Stephan
> Hi,
> here's a bit from dmesg:
>
> Linux agpgart interface v0.99 (c) Jeff Hartmann
> agpgart: Maximum main memory to use for agp memory: 150M
> agpgart: Detected an Intel(R) 830M Chipset.
> invalid operand: 0000
> CPU: 0
> EIP: 0819:[<c022d22c>] Not tainted
> EFLAGS: 00213207
> eax: c04f6000 ebx: c04f6ca0 ecx: 01000000 edx: 00000328
> esi: 00000000 edi: 00000000 ebp: 00000001 esp: ca871e88
> ds: 0821 es: 0821 ss: 0821
> Process modprobe.moduti (pid: 292, stackpage=ca871000)<1>
> Stack: 00000001 c0406540 c01233fb ca364000 c11c154c 00000000 00000000
> 00000001 c022d52e c11c154c 00000073 ca871eb8 00000000 c11c154c 00000000
> 00000000 00000000 cc46ffe5 c11c154c 00000001 00000073 00000063 cc473e96
> ca871f14 Call Trace: [<c01233fb>] [<c022d52e>] [<cc46ffe5>]
> [<cc473e96>] [<cc474000>] [<cc474ec0>] [<c010a030>] [<cc46e060>]
> [<c022481f>]
>
>
> this happens with 2.4.27-based xen0, with non-xen enabled 2.4.27 everything
> is fine.
> Should I expect problems on other agpgart modules ( for example, are
> radeons known to work? ).

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Re: agpgart and i830M Chipset problem [ In reply to ]

xen at forumakad

Nov 8, 2004, 7:42 AM

Post #4 of 5 (247 views)

Permalink

> Yes -- agapgart is currently broken for Xen 2.4 and 2.6 kernels. We're
> planning to fix XenLinux-2.6 but are unlikely to put in the effort for
Hmm, how is agpgart broken and what would be required to fix xen on 2.4?

--
Dariush Pietrzak,
Key fingerprint = 40D0 9FFB 9939 7320 8294 05E0 BCC7 02C4 75CC 50D9

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Re: agpgart and i830M Chipset problem [ In reply to ]

Keir.Fraser at cl

Nov 8, 2004, 7:55 AM

Post #5 of 5 (248 views)

Permalink

> > Yes -- agapgart is currently broken for Xen 2.4 and 2.6 kernels. We're
> > planning to fix XenLinux-2.6 but are unlikely to put in the effort for
> Hmm, how is agpgart broken and what would be required to fix xen on 2.4?

The agpgart drivers need fixing to understand that kernel memory
layout is not the same as physical layout when running on Xen.

We need to fix and test the drivers, and push the changes to the
agpgart maintainer(s). I had a go for 2.6, and put my tentative patch
in patches/linux-2.6.9 (there is one for DRM drivers as well). I have
no hardware to test the patch on, but I'm told it gets a bit further
than it otherwise would, but still doesn't actually work.

-- Keir

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