INFO: Your CPU does not support KVM extensions

asked 2014-12-29 07:42:25 -0600

sudharsan gravatar image


I'm using virtual box in a windows laptop. When I check the KVM status in the VM it displayed as,

ubuntu@openstack:~$ sudo kvm-ok [sudo] password for ubuntu: INFO: Your CPU does not support KVM extensions KVM acceleration can NOT be used sudharsan@openstack:~$

ubuntu@openstack:~$ egrep -c '(vmx|svm)' /proc/cpuinfo 0

Does this mean my CPU does not support VT ? I did installed processor identification utility & could see "Intel Virtualization Technology" as "Yes" which means VT enabled. Do I need to install any in my laptop to have KVM support for VM's ? Need more clarity.

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answered 2014-12-29 08:39:24 -0600

RHK gravatar image

check your CPU is compatible for virtualization tech?

check in your BIOS virtualization tech is enable or not. If it is disable, make it enable.

Also check VT-x /AMD-V is in enable or not in virtual box settings.


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answered 2014-12-29 08:32:52 -0600

NoNoNoo gravatar image

You need "nested virtualization" in order to install a KVM Hypervisor inside a virtual machine of another hypervisor (virtual box in your case). From this url I have seen that virtual box doesn't have nested virtualization feature.

You have two other options:

  • Use another hypervisor that support virtualization(VMware Workstation support it)
  • Use QEMU instead of KVM for Openstack that doesn't require virtualization cpu features
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Asked: 2014-12-29 07:42:25 -0600

Seen: 17,786 times

Last updated: Dec 29 '14