I've attempted to enable hugepages as explained in this article, however now systemd automagically mounts it to /dev/hugepages with root group. Thus qemu running as the user kvm won't have proper permissions. It's good idea to specify the mountpoint in /etc/fstab like this.
hugetlbfs /dev/hugepages hugetlbfs mode=1770,gid=78 0 0