[Users] Nested virt failing

I have Fedora 18 with ovirt running. I have vdsm-hook-nestedvt.noarch installed on all the nodes. The nodes are all identical with Intel i5-2400 CPUs (SandyBridge). When I try to boot a nested virtual machine (L2) instead of a ovirt virtual machine (L1), the kernel starts to load, and then that nested virtual machines (L2) pauses. On the host running Fedora 18 dmesg shows this message: nested_vmx_run: VMCS MSR_{LOAD,STORE} unsupported Reading this bug https://bugzilla.redhat.com/show_bug.cgi?id=892240 It looks like if the Fedora 18 ovirt nodes started the the L1 using the "core2duo" CPU flag instead of host pass through it might work? How do I do that, or are there other solutions? TIA, Dax Kelson