I have a self built system using an Intel D 920 processor and a MB that supports VT. I'm able to run HVM domains fine, but have trouble getting multiple VCPUs for these domains. Here is an example of one of my configs.
import os, re
arch = os.uname()[4]
if re.search('64', arch):
arch_libdir = 'lib64'
else:
arch_libdir = 'lib'
#----------------------------------------------------------------------------
# Kernel image file.
kernel = "/usr/lib/xen/boot/hvmloader"
# The domain build function. HVM domain uses 'hvm'.
builder='hvm'
# Initial memory allocation (in megabytes) for the new domain.
memory = 256
# A name for your domain. All domains must have different names.
name = "windows"
#-----------------------------------------------------------------------------
# the number of cpus guest platform has, default=1
vcpus=2
# enable/disable HVM guest PAE, default=0 (disabled)
#pae=0
# enable/disable HVM guest ACPI, default=0 (disabled)
#acpi=0
# enable/disable HVM guest APIC, default=0 (disabled)
#apic=0
# List of which CPUS this domain is allowed to use, default Xen picks
#cpus = "" # leave to Xen to pick
#cpus = "0" # all vcpus run on CPU0
#cpus = "0-3,5,^1" # run on cpus 0,2,3,5
# Optionally define mac and/or bridge for the network interfaces.
# Random MACs are assigned if not given.
#vif = [ 'type=ioemu, mac=00:16:3e:00:00:11, bridge=xenbr0' ]
# type=ioemu specify the NIC is an ioemu device not netfront
vif = [ 'type=ioemu, bridge=xenbr0' ]
#----------------------------------------------------------------------------
# Define the disk devices you want the domain to have access to, and
# what you want them accessible as.
# Each disk entry is of the form phy:UNAME,DEV,MODE
# where UNAME is the device, DEV is the device name the domain will see,
# and MODE is r for read-only, w for read-write.
#disk = [ 'phy:hda1,hda1,r' ]
disk = [ 'file:/root/windows.img,ioemu:hda,w' ]
#----------------------------------------------------------------------------
# Configure the behaviour when a domain exits. There are three 'reasons'
# for a domain to stop: poweroff, reboot, and crash. For each of these you
# may specify:
#
# "destroy", meaning that the domain is cleaned up as normal;
# "restart", meaning that a new domain is started in place of the old
# one;
# "preserve", meaning that no clean-up is done until the domain is
# manually destroyed (using xm destroy, for example); or
# "rename-restart", meaning that the old domain is not cleaned up, but is
# renamed and a new domain started in its place.
#
# The default is
#
#
# on_reboot = 'restart'
# on_crash = 'restart'
#
# For backwards compatibility we also support the deprecated option restart
#
# restart = 'onreboot' means
# on_reboot = 'restart'
# on_crash = 'destroy'
#
# restart = 'always' means
# on_reboot = 'restart'
# on_crash = 'restart'
#
# restart = 'never' means
# on_reboot = 'destroy'
# on_crash = 'destroy'
#
#on_reboot = 'restart'
#on_crash = 'restart'
#============================================================================
# New stuff
device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
#-----------------------------------------------------------------------------
# Disk image for
cdrom='/images/xp.iso'
#-----------------------------------------------------------------------------
# boot on floppy (a), hard disk (c) or CD-ROM (d)
boot='d'
#-----------------------------------------------------------------------------
# write to temporary files instead of disk image files
#snapshot=1
#----------------------------------------------------------------------------
# enable SDL library for graphics, default = 0
sdl=0
#----------------------------------------------------------------------------
# enable VNC library for graphics, default = 1
vnc=1
#----------------------------------------------------------------------------
# enable spawning vncviewer(only valid when vnc=1), default = 1
vncviewer=0
#----------------------------------------------------------------------------
# no graphics, use serial port
#nographic=0
#----------------------------------------------------------------------------
# enable stdvga, default = 0 (use cirrus logic device model)
stdvga=1
#-----------------------------------------------------------------------------
# serial port re-direct to pty deivce, /dev/pts/n
# then xm console or minicom can connect
serial='pty'
#----------------------------------------------------------------------------
# enable ne2000, default = 0(use pcnet)
ne2000=0
#-----------------------------------------------------------------------------
# enable audio support
#audio=1
#-----------------------------------------------------------------------------
# set the real time clock to local time [default=0 i.e. set to utc]
localtime=1
#-----------------------------------------------------------------------------
# start in full screen
#full-screen=1
-----------------------------------------------------------------------------------------------
I'm running Xen 3.0.2-2 from the binary download. The HVM domain only sees 1 cpu and xm list displays on VCPU.
Any help would be greatly appreciated.
Jared