Open Stack

Hi,

I am trying to install Ice-house on ubuntu 12.04 and unable to start 
nova-compute service as it throws
below error:

2014-06-16 12:52:24.528 15498 TRACE 
nova.openstack.common.threadgroup     self._do_quality_warnings()
2014-06-16 12:52:24.528 15498 TRACE nova.openstack.common.threadgroup   
File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", 
line 638, in _do_quality_warnings
2014-06-16 12:52:24.528 15498 TRACE 
nova.openstack.common.threadgroup     caps = self.get_host_capabilities()
2014-06-16 12:52:24.528 15498 TRACE nova.openstack.common.threadgroup   
File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", 
line 2843, in get_host_capabilities
2014-06-16 12:52:24.528 15498 TRACE nova.openstack.common.threadgroup 
libvirt.VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES)
2014-06-16 12:52:24.528 15498 TRACE nova.openstack.common.threadgroup   
File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 179, in doit
2014-06-16 12:52:24.528 15498 TRACE 
nova.openstack.common.threadgroup     result = 
proxy_call(self._autowrap, f, *args, **kwargs)
2014-06-16 12:52:24.528 15498 TRACE nova.openstack.common.threadgroup   
File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 139, in 
proxy_call
2014-06-16 12:52:24.528 15498 TRACE 
nova.openstack.common.threadgroup     rv = execute(f,*args,**kwargs)
2014-06-16 12:52:24.528 15498 TRACE nova.openstack.common.threadgroup   
File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 77, in 
tworker
2014-06-16 12:52:24.528 15498 TRACE 
nova.openstack.common.threadgroup     rv = meth(*args,**kwargs)
2014-06-16 12:52:24.528 15498 TRACE nova.openstack.common.threadgroup   
File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3127, in 
baselineCPU
2014-06-16 12:52:24.528 15498 TRACE 
nova.openstack.common.threadgroup     if ret is None: raise libvirtError 
('virConnectBaselineCPU() failed', conn=self)
2014-06-16 12:52:24.528 15498 TRACE nova.openstack.common.threadgroup 
libvirtError: XML error: Missing CPU model name
2014-06-16 12:52:24.528 15498 TRACE nova.openstack.common.threadgroup

Please see below configuration for nova-compute.

nova-compute.conf

[DEFAULT]
compute_driver=libvirt.LibvirtDriver
[libvirt]
virt_type=qemu

Does anyone has any idea? Pointers in the right direction are highly 
appreciated.

Regards,
Rajshree