options kvm_intel nested=1
[root@localhost ~]# cat /etc/modprobe.d/kvm.conf
###
### This configuration file was provided by the qemu package.### Feel free to update as needed.
###
###
### Set these options to enable nested virtualization
###
options kvm_intel nested=1
#options kvm_amd nested=1
2. Remove and Add the kvm_intel module
modprobe -r kvm_intel
modprobe kvm_intel
3. Verify whether the change has been applied or not,
cat /sys/module/kvm_intel/parameters/nested
Y
4.Use 'Copy host CPU configuration' in VM's CPU configurations
