How to enable KVM nesting virtualization on the Jetson nano.

Hello to everyone. while I was looking for a way to enable the nesting virtualization on my Jetson nano,after having enabled KVM applying these patches : https://github.com/OE4T/linux-tegra-4.9/blob/oe4t-patches-l4t-r37.4/ <https://github.com/OE4T/linux-tegra-4.9/blob/oe4t-patches-l4t-r32.4/arch/... When I have googled for acquiring more informations,I found these interesting threads : https://patches.linaro.org/project/qemu-devel/patch/b7c2626e6c720ccc43e57... https://superuser.com/questions/1838383/arm-cpu-nested-virtualization-how... On the first site,he says : Good,I could try,but I'm not using qemu directly (I've installed qemu vers. 9) ,but virt-manager version 4.0. Maybe I should upgrade it ? In virt-manager I don't see how I can specify those parameters. Anyway I'm not sure that it will work,because on the second thread he said to : -append "kvm-arm.mode=nested" \ Where is the truth ? Very thanks. -- Mario.