Applying Virtualization - Oracle Solaris 10 System Virtualization Essentials - page 270

2. Install the xVM hypervisor packages.
# /usr/bin/pkg -R /mnt/xvm install xvm-gui
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Unmount the new boot environment.
# /usr/sbin/beadm umount xvm
3. Configure the new boot environment.
Edt the /rpool/boot/grub/menu.lst file so that it contains the following
entries:
title xVM hypervisor
findroot (pool_rpool,0,a)
bootfs rpool/ROOT/xvm
splashimage /boot/solaris.xpm
foreground d25f00
background 115d93
kernel$ /boot/$ISADIR/xen.gz
module$ /platform/i86xpv/kernel/$ISADIR/unix /platform/i86xpv/kernel/$ISADIR/unix
-B $ZFS-BOOTFS,console=text
module$ /platform/i86pc/$ISADIR/boot_archive
Note
The code from module$ to console=text is a single line.
Ideally, dom0 memory should be limited. For example, if there is 4 GB of
physical memory, allocate 1 GB for dom0. The setting dom0_mem=1G should
be appended to the kernel boot line, as in this example:
kernel$ /boot/$ISADIR/xen.gz dom0_mem=1G
If this setting is applied, dom0 will see only 1 GB of RAM. The additional 3
GB of RAM is still available for use by guests, but not by dom0.
Limiting the memory of dom0 in this way prevents problems when the
system is under memory pressure and minimizes the interaction between
the hypervisor and the dom0 balloon process.
A balloon process is a thread within the dom0 kernel that works with the
hypervisor to dynamically grow and shrink the amount of memory within