Feature Request: Nested Virtualization

[naY9yjoS6ZqhOd35sIFH]

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name: Feature Request Nested Virtualzation KVM-backend in VirtualBox

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Bug Description

after enable Nested Virtualzation of exist VMs it doesn't work with Nested Virtualzation in VMs

How to Reproduce

mkdir -p /media/ramos/vbox
VBoxManage createvm --name x64zfs --default --basefolder=/media/ramos/vbox --ostype=Linux26_64 --register
VBoxManage modifyvm x64zfs --nested-hw-virt=on

VM configuration

Guest OS configuration details:

• Bedrock Linux x86_64
• with debian xanmod kernel
• 6.6.21-x64v1-xanmod1
• runs QEMU and VirtualBox-kvm too

Host OS details:

• Bedrock Linux
• run with gentoo/debian kernel
• and arch userland
• 6.6.21-gentoo-x86_64
• 5.15.151-gentoo-x86_64
• 6.6.21-x64v2-xanmod1

Logs

each machine one reply

[naY9yjoS6ZqhOd35sIFH]

VBox.log cpu.txt dmesg.txt x64zfs.vbox.txt

[tpressure]

Hi @naY9yjoS6ZqhOd35sIFH

nested virtualization support is ongoing work and is currently not supported by the KVM-Backend for VirtualBox.

[tpressure]

You can try the following test branch for nested VMX (Intel). Note that SVM (AMD) is not supported right now.

https://github.com/tpressure/virtualbox-kvm/tree/nested_vmx_dev

To enable nested virtualization, you have to run VBoxManage modifyvm <vm_name> --nested-hw-virt on

[tpressure]

Nested virtualization for Intel systems is now officially supported with the latest release: https://github.com/cyberus-technology/virtualbox-kvm/releases/tag/dev-20240502

[naY9yjoS6ZqhOd35sIFH]

roger that,and AMD support is No worries. I'm in no hurry