After your fresh CentOS 7 setup (make sure you install the QEMU/KVM virtualization tools and virt-manager
), install the mainline kernel:
sudo rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
sudo rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
sudo yum --enablerepo=elrepo-kernel install kernel-ml
sudo yum -y update