During RHEL installation ..Select the Virtualization package group and the Customize Now radio button.
Select the KVM package group. Deselect the Virtualization package group. This selects the KVM hypervisor, virt-manager, libvirt and virt-viewer for installation.
Installing the KVM hypervisor with yum To use virtualization on Red Hat Enterprise Linux you require the kvm package. The kvm package contains the KVM kernel module providing the KVM hypervisor on the default Red Hat Enterprise Linux kernel.
To install the kvm package, run:
# yum install kvm
Now, install additional virtualization management packages. Recommended virtualization packages:
Provides the virt-install command for creating virtual machines.
libvirt is an API library for interacting with hypervisors. libvirt uses
the xm virtualization framework and the virsh command line tool to manage and control virtual machines.
The libvirt-python package contains a module that permits applications written in the Python programming language to use the interface supplied by the libvirt API.
virt-manager, also known as Virtual Machine Manager, provides a graphical tool for
administering virtual machines. It uses libvirt library as the management API.
Install the other recommended virtualization packages:
# yum install virt-manager libvirt libvirt-python python-virtinst
More at - Redhat Docs