ia64/xen: a recipe for using xen/ia64 with pv_ops.
Recipe for using xen/ia64 with pv_ops domU. Signed-off-by: Akio Takebe <takebe_akio@jp.fujitsu.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
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Isaku Yamahata
Tony Luck
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Documentation/ia64/xen.txt
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Documentation/ia64/xen.txt
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Recipe for getting/building/running Xen/ia64 with pv_ops
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--------------------------------------------------------
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This recipe describes how to get xen-ia64 source and build it,
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and run domU with pv_ops.
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============
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Requirements
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============
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- python
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- mercurial
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it (aka "hg") is an open-source source code
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management software. See the below.
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http://www.selenic.com/mercurial/wiki/
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- git
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- bridge-utils
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=================================
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Getting and Building Xen and Dom0
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=================================
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My environment is;
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Machine : Tiger4
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Domain0 OS : RHEL5
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DomainU OS : RHEL5
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1. Download source
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# hg clone http://xenbits.xensource.com/ext/ia64/xen-unstable.hg
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# cd xen-unstable.hg
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# hg clone http://xenbits.xensource.com/ext/ia64/linux-2.6.18-xen.hg
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2. # make world
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3. # make install-tools
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4. copy kernels and xen
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# cp xen/xen.gz /boot/efi/efi/redhat/
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# cp build-linux-2.6.18-xen_ia64/vmlinux.gz \
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/boot/efi/efi/redhat/vmlinuz-2.6.18.8-xen
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5. make initrd for Dom0/DomU
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# make -C linux-2.6.18-xen.hg ARCH=ia64 modules_install \
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O=$(/bin/pwd)/build-linux-2.6.18-xen_ia64
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# mkinitrd -f /boot/efi/efi/redhat/initrd-2.6.18.8-xen.img \
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2.6.18.8-xen --builtin mptspi --builtin mptbase \
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--builtin mptscsih --builtin uhci-hcd --builtin ohci-hcd \
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--builtin ehci-hcd
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================================
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Making a disk image for guest OS
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================================
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1. make file
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# dd if=/dev/zero of=/root/rhel5.img bs=1M seek=4096 count=0
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# mke2fs -F -j /root/rhel5.img
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# mount -o loop /root/rhel5.img /mnt
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# cp -ax /{dev,var,etc,usr,bin,sbin,lib} /mnt
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# mkdir /mnt/{root,proc,sys,home,tmp}
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Note: You may miss some device files. If so, please create them
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with mknod. Or you can use tar instead of cp.
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2. modify DomU's fstab
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# vi /mnt/etc/fstab
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/dev/xvda1 / ext3 defaults 1 1
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none /dev/pts devpts gid=5,mode=620 0 0
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none /dev/shm tmpfs defaults 0 0
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none /proc proc defaults 0 0
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none /sys sysfs defaults 0 0
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3. modify inittab
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set runlevel to 3 to avoid X trying to start
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# vi /mnt/etc/inittab
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id:3:initdefault:
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Start a getty on the hvc0 console
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X0:2345:respawn:/sbin/mingetty hvc0
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tty1-6 mingetty can be commented out
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4. add hvc0 into /etc/securetty
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# vi /mnt/etc/securetty (add hvc0)
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5. umount
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# umount /mnt
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FYI, virt-manager can also make a disk image for guest OS.
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It's GUI tools and easy to make it.
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==================
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Boot Xen & Domain0
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==================
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1. replace elilo
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elilo of RHEL5 can boot Xen and Dom0.
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If you use old elilo (e.g RHEL4), please download from the below
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http://elilo.sourceforge.net/cgi-bin/blosxom
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and copy into /boot/efi/efi/redhat/
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# cp elilo-3.6-ia64.efi /boot/efi/efi/redhat/elilo.efi
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2. modify elilo.conf (like the below)
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# vi /boot/efi/efi/redhat/elilo.conf
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prompt
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timeout=20
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default=xen
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relocatable
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image=vmlinuz-2.6.18.8-xen
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label=xen
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vmm=xen.gz
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initrd=initrd-2.6.18.8-xen.img
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read-only
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append=" -- rhgb root=/dev/sda2"
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The append options before "--" are for xen hypervisor,
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the options after "--" are for dom0.
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FYI, your machine may need console options like
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"com1=19200,8n1 console=vga,com1". For example,
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append="com1=19200,8n1 console=vga,com1 -- rhgb console=tty0 \
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console=ttyS0 root=/dev/sda2"
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=====================================
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Getting and Building domU with pv_ops
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=====================================
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1. get pv_ops tree
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# git clone http://people.valinux.co.jp/~yamahata/xen-ia64/linux-2.6-xen-ia64.git/
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2. git branch (if necessary)
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# cd linux-2.6-xen-ia64/
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# git checkout -b your_branch origin/xen-ia64-domu-minimal-2008may19
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(Note: The current branch is xen-ia64-domu-minimal-2008may19.
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But you would find the new branch. You can see with
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"git branch -r" to get the branch lists.
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http://people.valinux.co.jp/~yamahata/xen-ia64/for_eagl/linux-2.6-ia64-pv-ops.git/
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is also available. The tree is based on
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git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 test)
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3. copy .config for pv_ops of domU
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# cp arch/ia64/configs/xen_domu_wip_defconfig .config
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4. make kernel with pv_ops
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# make oldconfig
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# make
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5. install the kernel and initrd
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# cp vmlinux.gz /boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU
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# make modules_install
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# mkinitrd -f /boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img \
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2.6.26-rc3xen-ia64-08941-g1b12161 --builtin mptspi \
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--builtin mptbase --builtin mptscsih --builtin uhci-hcd \
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--builtin ohci-hcd --builtin ehci-hcd
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========================
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Boot DomainU with pv_ops
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========================
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1. make config of DomU
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# vi /etc/xen/rhel5
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kernel = "/boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU"
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ramdisk = "/boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img"
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vcpus = 1
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memory = 512
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name = "rhel5"
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disk = [ 'file:/root/rhel5.img,xvda1,w' ]
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root = "/dev/xvda1 ro"
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extra= "rhgb console=hvc0"
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2. After boot xen and dom0, start xend
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# /etc/init.d/xend start
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( In the debugging case, # XEND_DEBUG=1 xend trace_start )
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3. start domU
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# xm create -c rhel5
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=========
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Reference
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=========
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- Wiki of Xen/IA64 upstream merge
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http://wiki.xensource.com/xenwiki/XenIA64/UpstreamMerge
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Written by Akio Takebe <takebe_akio@jp.fujitsu.com> on 28 May 2008
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