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Nested installation in KVM

Check for nested virtualization option in your host operating system:

• Intel processors: cat /sys/module/kvm_intel/parameters/nested
• AMD processors: cat /sys/module/kvm_amd/parameters/nested

It should show a 1 or Y if it is enabled.

You will need to enable nested virtualization on your host operating system if not active yet.

Nested virt in Intel processors:

Live

With all VMs stopped remove kvm_intel module

modprobe -r kvm_intel

And load it again with nested option:

modprobe kvm_intel nested=1

Permanent

Create the file /etc/modprobe.d/kvm.conf and add inside:

options kvm_intel nested=1

Nested virt in AMD processors:

Live

With all VMs stopped remove kvm_amd module

modprobe -r kvm_amd

And load it again with nested option:

modprobe kvm_amd nested=1

Permanent

Create the file /etc/modprobe.d/kvm.conf and add inside:

options kvm_amd nested=1

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Last update: April 19, 2023