Recipe for getting/building/running Xen/ia64 with pv_ops

This recipe describes how to get xen-ia64 source and build it, and run domU with pv_ops.


Getting and Building Xen and Dom0

My environment is:

  • Machine : Tiger4
  • Domain0 OS : RHEL5
  • DomainU OS : RHEL5
  1. Download source:

    # hg clone
    # cd xen-unstable.hg
    # hg clone
  2. # make world

  3. # make install-tools

  4. copy kernels and xen:

    # cp xen/xen.gz /boot/efi/efi/redhat/
    # cp build-linux-2.6.18-xen_ia64/vmlinux.gz \
  5. make initrd for Dom0/DomU:

    # make -C linux-2.6.18-xen.hg ARCH=ia64 modules_install \
    # mkinitrd -f /boot/efi/efi/redhat/initrd- \ --builtin mptspi --builtin mptbase \
      --builtin mptscsih --builtin uhci-hcd --builtin ohci-hcd \
      --builtin ehci-hcd

Making a disk image for guest OS

  1. make file:

    # dd if=/dev/zero of=/root/rhel5.img bs=1M seek=4096 count=0
    # mke2fs -F -j /root/rhel5.img
    # mount -o loop /root/rhel5.img /mnt
    # cp -ax /{dev,var,etc,usr,bin,sbin,lib} /mnt
    # mkdir /mnt/{root,proc,sys,home,tmp}
    Note: You may miss some device files. If so, please create them
    with mknod. Or you can use tar instead of cp.
  2. modify DomU’s fstab:

    # vi /mnt/etc/fstab
       /dev/xvda1  /            ext3    defaults        1 1
       none        /dev/pts     devpts  gid=5,mode=620  0 0
       none        /dev/shm     tmpfs   defaults        0 0
       none        /proc        proc    defaults        0 0
       none        /sys         sysfs   defaults        0 0
  3. modify inittab

    set runlevel to 3 to avoid X trying to start:

    # vi /mnt/etc/inittab

    Start a getty on the hvc0 console:

    X0:2345:respawn:/sbin/mingetty hvc0

    tty1-6 mingetty can be commented out

  4. add hvc0 into /etc/securetty:

    # vi /mnt/etc/securetty (add hvc0)
  5. umount:

    # umount /mnt

FYI, virt-manager can also make a disk image for guest OS. It’s GUI tools and easy to make it.

Boot Xen & Domain0

  1. replace elilo elilo of RHEL5 can boot Xen and Dom0. If you use old elilo (e.g RHEL4), please download from the below and copy into /boot/efi/efi/redhat/:

    # cp elilo-3.6-ia64.efi /boot/efi/efi/redhat/elilo.efi
  2. modify elilo.conf (like the below):

    # vi /boot/efi/efi/redhat/elilo.conf
           append=" -- rhgb root=/dev/sda2"

The append options before “–” are for xen hypervisor, the options after “–” are for dom0.

FYI, your machine may need console options like “com1=19200,8n1 console=vga,com1”. For example, append=”com1=19200,8n1 console=vga,com1 – rhgb console=tty0 console=ttyS0 root=/dev/sda2”

Getting and Building domU with pv_ops

  1. get pv_ops tree:

    # git clone
  2. git branch (if necessary):

    # cd linux-2.6-xen-ia64/
    # git checkout -b your_branch origin/xen-ia64-domu-minimal-2008may19

The current branch is xen-ia64-domu-minimal-2008may19. But you would find the new branch. You can see with “git branch -r” to get the branch lists.

is also available.

The tree is based on

git:// test)
  1. copy .config for pv_ops of domU:

    # cp arch/ia64/configs/xen_domu_wip_defconfig .config
  2. make kernel with pv_ops:

    # make oldconfig
    # make
  3. install the kernel and initrd:

    # cp vmlinux.gz /boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU
    # make modules_install
    # mkinitrd -f /boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img \
      2.6.26-rc3xen-ia64-08941-g1b12161 --builtin mptspi \
      --builtin mptbase --builtin mptscsih --builtin uhci-hcd \
      --builtin ohci-hcd --builtin ehci-hcd

Boot DomainU with pv_ops

  1. make config of DomU:

    # vi /etc/xen/rhel5
      kernel = "/boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU"
      ramdisk = "/boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img"
      vcpus = 1
      memory = 512
      name = "rhel5"
      disk = [ 'file:/root/rhel5.img,xvda1,w' ]
      root = "/dev/xvda1 ro"
      extra= "rhgb console=hvc0"
  2. After boot xen and dom0, start xend:

    # /etc/init.d/xend start
( In the debugging case, # XEND_DEBUG=1 xend trace_start )
  1. start domU:

    # xm create -c rhel5


Written by Akio Takebe <> on 28 May 2008