Whether is it support nested visualization?

[ByteFlyCoding]

I want create a virtual machine in a existing virtual machine that run on macbook pro of apple sillicon m1 pro. This may need support nested visualization. But I don't know lima-vm whether it is support nested visualization.

[AkihiroSuda]

Nested virtualization seems missing on the M1 series.

Apparently M2 supports nested virt, but Lima can't support it until Virtualization.framework or QEMU supports it.

[msgilligan]

Virtualization Framework beta documentation says it will work on macOS 15+ on M3+:
https://developer.apple.com/documentation/virtualization/vzgenericplatformconfiguration/4360553-isnestedvirtualizationsupported?changes=latest_minor

[abiosoft]

I can confirm that I successfully tested nested virtualization support on m3 Macbook running macOS 15 beta and kvm-ok does indeed report success 🎉.

[asauber]

@abiosoft could you share which distro image and lima configuration that you used for testing? With some brief testing, I haven't yet been able to see /dev/kvm on a guest.

[abiosoft]

I used Ubuntu 24.04

[abiosoft]

It's not yet merged in.
You can check #2530 (comment) for context.

[asauber]

I was able to create a Lima VM with KVM support with your testing instructions.

$ limactl shell ubuntunested
WARN[0000] treating lima version "bc39aed.m" from "/Users/asauber/.lima/ubuntunested/lima-version" as very latest release
asauber@lima-ubuntunested:/Users/asauber$ kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be used

Very cool. Thank you for working on this!