Re: [Xen-users] GPU passthrough with xen 4.2.1 on ubuntu 12.10

[Matthew Dean <mcd40@xxxxxxxxx>]

Just to let everyone know that patch worked like gold for me.  My HD 
7970 is now being passed through as the primary adapter with driver 
version 13.1 and up to now all seems to be working.  Will run further 
tests over the next few days to make sure it stays that way and I'll 
probably test secondary passthrough also.  Once that's done I need to 
put the second card back in and have a bit of a play but this is by far 
the furthest I've been in the last 2 weeks.  Thanks to everybody for 
your advice.
Matt

On 12/03/2013 19:42, Matthias wrote:
> Hi,
>
> to fix the atikmeq.sys bug, you can try two things:
>
> 1) Use upstream qemu. For this, just add:
>
> device_model_version = 'qemu-xen'
> device_model_override = '/usr/lib/xen/bin/qemu-system-i386'
>
> to your domU config file. Note that there is currently a bug that the
> domU won't start when duing vga passthrough with more then 4GB memory
> assigned, so better use some less..
>
> 2) If you want to have more then 4GB memory, you can patch the
> traditional qemu. This is a bit more complicated cause the qemu stuff
> is download through the build and can't be patched right away. Also
> stopping in mid build, patching and continuing at least for me caused
> some problems, so doing a full build, patch, cleanup and build again
> is the safer route:
>
> git clone -b staging git://xenbits.xen.org/xen.git xen-unstable-staging
> cd xen-unstable-staging
> ./configure --disable-stubdom
> make -j12 world
> git apply --check /path/to/xen-unstable-atipassthrough.patch
> git apply /path/to/xen-unstable-atipassthrough.patch
> make -j12 clean
> make -j12 world
> Now do your usual install.. some use the standard, i prefer creating a debball..
>
> Some Notes:
> - I use the staging branch from xen-unstable, but this is not exactly
> necessary for the patch, you can use master just as fine
> - the j12 is for multithreading and you should use double your core
> number.. since i got 6 cpu cores, it's 12 for me..
> - the patch i have attached is originally from Greg
> (http://lists.xen.org/archives/html/xen-devel/2012-12/msg00009.html),
> so credit goes to him, i only cleaned it up for xen-unstable. Also,
> the patch itself was for providing primary passthrough with ATI cards,
> but i found it fixing my ati 0x116 bluescreen..
> - due to an insufficiancy in the patch, stubdom would not build
> correctly, so you have to disable it
>
> Please report back if the patch fixes your bluescreen for more
> argumentation to bring this patch upstream.. :)  (@Greg: that's why i
> cc'ed you. hope you don't mind the noise)
>
> Hope it helps!

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