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xen-users
Re: [Xen-users] Xen 4.1.0 - VGA Passthrough ATI Radeon 4550 - Partial Su
On Mon, May 02, 2011 at 06:38:58PM -0400, Sébastien Gauthier wrote:
> Hello,
>
> I was able to successfully passthrough my ATI Radeon 4550 VGA to a HVM
> Windows 7 guest.
> However, after installing ATI/AMD latest Catalyst drivers, I get a BSOD on
> reboot.
>
> Here are the steps I've followed to get there :
>
> Motherboard : Intel DQ45CB (with VT-d support)
> CPU : Intel Core 2 Duo E8400 3.00 Ghz (with VT-d support)
> Dom0 OS : Debian 6 Squeeze 64-bit
>
> 1- Install Debian stock Xen Kernel with Dom0 support (2.6.32-5) :
> apt-get install linux-image-2.6-xen-amd64
>
> 2- Install Xen required packages
> apt-get install bcc bin86 gawk bridge-utils iproute libcurl3
> libcurl4-openssl-dev bzip2 module-init-tools transfig tgif texinfo
> texlive-latex-base texlive-latex-recommended texlive-fonts-extra
> texlive-fonts-recommended pciutils-dev mercurial build-essential make gcc
> libc6-dev zlib1g-dev python python-dev python-twisted libncurses5-dev
> patch libvncserver-dev libsdl-dev libjpeg62-dev iasl libbz2-dev
> e2fslibs-dev git-core uuid-dev ocaml libx11-dev bison flex ocaml-findlib
> gcc-multilib xz-utils
>
> 3- Download and extract Xen 4.1.0 (Current stable version)
> cd /usr/src/; wget
> [1]http://bits.xensource.com/oss-xen/release/4.1.0/xen-4.1.0.tar.gz
> tar xvzf xen-4.1.0.tar.gz
>
> 4- Apply Mr. Wei Huang's patch (with dynamic detection of BARs) to Xen
> 4.1.0 source code
> cd /usr/src/xen-4.1.0/tools/ioemu-qemu-xen; touch patchATI.txt
> (Copy paste in file patchATI.txt, code found here :
> [2]http://xen.markmail.org/download.xqy?id=l7rw7d62lj27rzei&number=1 )
> patch -p1 < patchATI.txt
>
> 5- Compile and install Xen
> cd /usr/src/xen-4.1.0
> make xen
> make tools
> make stubdom
> make install-xen
> make install-tools PYTHON_PREFIX_ARG=
> make install-stubdom
>
> 6- Change default script for grub menu to 20_linux_xen :
> cd /etc/grub.d/; mv 10_linux 50_linux
>
> 7- Modify /etc/default/grub following entry to a functionnal kernel/xen
> combo (In my case it was entry 2 (Skipped 0 and 1 which were automatically
> created with file xen-syms-4.1.0 and didn't boot) :
> GRUB_DEFAULT=2
>
> 8- Use pciback to hide VGA (01:00.0 for my box, lspci -v) from host OS (In
> my case, I had to hide and passthrough ATI audio device (01:00:1) as well)
> - Note that Dom0 won't have access to VGA adapter anymore after reboot :
> GRUB_CMDLINE_LINUX="xen-pciback.permissive
> xen-pciback.hide=(01:00.0)(01:00.1)
> pci=resource_alignment=01:00.0;01:00.1"
>
> 9 - To apply changes made during steps 6, 7 and 8
> update-grub
>
> 10- Add this line to your /etc/fstab :
> none /proc/xen xenfs defaults 0 0
>
> 11- Add this module to your /etc/modules file :
> xen-evtchn
>
> 12- Reboot, then start Xend (using SSH obviously)
> reboot
> /etc/init.d/xencommons start
> /etc/init.d/xend start
>
> 13 - Make sure you have following settings in your guest VM config (I've
> only tried passthrough with a preinstalled Win7 guest for the moment, I
> didn't try to go through the whole installation process yet) :
> gfx_passthru=1
> pci=[ '01:00.0', '01:00.1' ]
>
> 14- Start VM with your fingers crossed
>
> At this point, I see Windows 7 boot screen, then login screen. After
> installing latest ATI/AMD drivers and rebooting, I get a BSOD.
>
> Hopefully it can help some people getting the initial Xen VGA passthrough
> setup done.
> As far as I know, this patch only works with fairly recent ATI adapters.
>
> I'm not a Xen expert in any way, so let me know if you have any idea about
> what's missing or what would be the next troubleshooting steps.
>
You might need to apply some custom patches for your hardware.
Did you see the posts on xen-devel from amd/ati engineers?
They've worked on Xen VGA passthru recently..
-- Pasi
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