KVM : Nested KVM

	Configure nested KVM. It's possible to install KVM Hypervisor and create virtual machines as nested KVM on KVM host.
[1]	Enable the setting for Nested KVM.

# show the current setting ( if the result is [Y], it's OK ) root@dlp:~#  cat /sys/module/kvm_intel/parameters/nested Y # if the result is [N], change like follows and reboot the system ) # specify [kvm_intel] for Intel CPU # specify [kvm_amd] for AMD CPU root@dlp:~#  echo 'options kvm_intel nested=1' >> /etc/modprobe.d/qemu-system-x86.conf

[2]	Edit configuration of an existing virtual machine you'd like to set Nested like follows. That's OK, it's possible to create virtual machine on GuestOS.

# edit config of a VM [debian13] root@dlp:~#  virsh edit debian13 # change [cpu mode] like follows <cpu mode=' host-passthrough ' check='none' migratable='on'/>