KVM nested virtualization

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KVM - nested virtualization

Check if it is already enabled (default AMD)

cat /sys/module/kvm_intel/parameters/nested 

If you get a N then you need to enabled it.

For intel it goes something like:

Update /etc/default/grub, add "kvm-intel.nested=1" to GRUB_CMDLINE_LINUX

GRUB_CMDLINE_LINUX="kvm-intel.nested=1"