KVM nested virtualization: guest ioctl calls

[siddhesh phadke]

Resending with subject.

I am newbie in nested KVM virtualization and I am trying to understand
the code for nested virtualization. I am not able to understand how
nested guest's ioctl calls are intercepted by KVM.Does each ioctl of
nested guest is intercepted by L0 or it is passed to L1?

Can anyone please help me with this or correct me if I am totally off the track?