CentOS 7
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KVM : Nested KVM2014/07/12

Configure nested KVM. It's possible to install KVM and create virtual machines as nested KVM on KVM host.
[1] Enable the setting for Nested KVM.
[root@dlp ~]#
vi /etc/modprobe.d/kvm-nested.conf
# create new

options kvm_intel nested=1
[root@dlp ~]#
modprobe -r kvm_intel
# unload

[root@dlp ~]#
modprobe kvm_intel
# reload again

[root@dlp ~]#
cat /sys/module/kvm_intel/parameters/nested

# just enabled

[2] Edit the configuration of a virtual machine you'd like to set nested like follows.
It's OK to configure nested KVM and you can create virtual machines on the virtual machine nested.
[root@dlp ~]#
virsh edit centos7
# edit a virtual machine "centos7"
# change like folows for "cpu mode" section

<cpu mode='
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