How to enable nested KVM in ubuntu 16.04

Check whether the nested KVM is enabled?

cat /sys/module/kvm_intel/parameters/nested

N

Upgrade the kernel to at least 3.18

You can check you kernel version by #uname -a

Edit /etc/default/grub

sudo vim /etc/default/grub

append kvm-intel.nested=1 to the value of GRUB_CMDLINE_LINUX

#update-grub

Reboot your system.

Reference

http://www.linuxidc.com/Linux/2015-05/117026.htm

http://www.rdoxenham.com/?p=275

http://www.cnblogs.com/saptechnique/archive/2012/04/05/2433643.html