After activating Hyper-V, Windows crashes into repair (nested virtualization)

[Tupacalypse]

I'm trying to get embedded virtualization.
Guest - Windows Server 2016 based on KVM. First of all I am guided by this article: Nested Virtualization - Proxmox VE, I have proxmox 5.2.

After activating the Hyper-V role and rebooting the system, Windows goes into repair. VMX, Vt-D respectively active.

Host:

Kernel 4.15.17
QEMU 2.11.1
CPU: Xeon E5645

I also tried to install Hyper-V 2016 edition, 2019 edition. The problem is similar.

Without nested (vmx), everything works accordingly.




What to do?

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