Cannot enable hardware virtualization

[achanda]

Hi,

I installed virtualbox 4.2.10 on OS X 10.8.3 and I am running Ubuntu 12.04 on it as a guest. I have hardware virtualization enabled for the guest, as the screenshot shows

settings

Screen Shot 2013-06-05 at 10.30.49 AM.png (71.33 KiB) Viewed 2203 times

But when I login to the VM and run

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egrep '^flags.*(vmx|svm)' /proc/cpuinfo

nothing appears. It seems virtualization is not enabled. What is wrong here?

EDIT
Running kvm-ok in the host tells me

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INFO: Your CPU does not support KVM extensions
KVM acceleration can NOT be used

Thanks

[noteirak]

You will not see the virtualization flag inside the VM, since it's already used by the host and is filtered out anyway.