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+[[meta copyright="Copyright © 2007, 2008 Free Software Foundation, Inc."]]
+
+[[meta license="""[[toggle id="license" text="GFDL 1.2+"]][[toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled
+[[GNU_Free_Documentation_License|/fdl]]."]]"""]]
+
+[[toc ]]
+
+## Xen dom0, PAE-disabled hypervisor
+
+/!\ Since GNU Mach doesn't handle PAE yet, you'll need a PAE-disabled hypervisor.
+
+On Debian Lenny, for example, you can install xen-hypervisor-3.2-1-i386-nonpae.
+
+This also means that you'll currently need a PAE-disabled `dom0`.
+[[Stefan_Siegl|stesie]] is providing a PAE-disabled Linux kernel image at
+<http://brokenpipe.de/GnuHurd/XEN/>.
+
+You can either get binaries at <http://youpibouh.thefreecat.org/hurd-xen/> or build them yourself.
+
+- Copy `gnumach-xen` and `hurd-modules` to your dom0 /boot.
+- Copy `hurd` into `/etc/xen`, edit it for fixing access to your hurd / and swap
+
+## GNU/Hurd system
+
+/!\ You need an already installed GNU/Hurd system.
+
+If you have a free partition, you can fdisk to type 0x83, create a filesystem using:
+
+    sudo mke2fs -b 4096 -I 128 -o hurd /dev/sda4 
+
+Replace /dev/sda4 with your partition. Install and use crosshurd to setup a GNU/Hurd system on this partition.
+
+## /etc/xen/hurd configuration
+
+Here is a sample /etc/xen/hurd configuration
+
+    kernel = "/boot/gnumach-xen"
+    memory = 256
+    disk = ['phy:sda4,hda,w']
+    extra = "root=device:hd0"
+    vif = [ '' ]
+    ramdisk = "/boot/hurd-modules"
+
+Suggestions about [[networking_configuration]] are available.
+
+If you need stable MAC addresses, use a syntax like `vif = [
+'mac=00:16:3e:XX:XX:XX, bridge=br0' ]`.
+
+## Running Hurd with Xen
+
+To run Hurd with Xen, use:
+
+    xm create -c hurd
+
+and gnumach should get started. Proceed with native-install.
+
+    export TERM=mach
+    ./native-install
+
+- If `xm` complains about networking (`vif could not be connected`), it's Xen scripts' fault, see Xen documentation for how to configure the network.  The simplest way is network-bridge with fixed IPs (note that you need the bridge-utils package for this).  You can also just disable networking by commenting the vif line in the config.
+- If `xm` complains `Error: (2, 'Invalid kernel', 'xc_dom_compat_check: guest type xen-3.0-x86_32 not supported by xen kernel, sorry\n')`, you most probably have a PAE-enabled hypervisor, and you just need to install and boot non-PAE hypervisor and kernel.
+
+## Building from sources
+
+If you want to generate these images, first get the `gnumach-1-branch-Xen-branch` branch from gnumach CVS.
+Then look for "Ugly" in `kern/bootstrap.c`, how to generate `hurd-modules` is explained there, and you'll have to fix `EXT2FS_SIZE` and `LD_SO_SIZE` by hand.
+Then use
+
+    ./configure --enable-platform=xen
+    make
+
+The current `hurd-modules` was built from the debian packages `hurd 20070606-2` and `libc0.3 2.6.1-1`.
+/!\ This means that when using this image, your GNU/Hurd system also needs to be a glibc version 2.6-based one!
+
+---
+
+[[Internals]].
+
+[[GNU_Savannah_task 5468]], [[GNU_Savannah_task 6584]].