yum install qemu-system-aarch64.aarch64

# yum install qemu-system-aarch64.aarch64
...
Error: Package: 2:qemu-system-aarch64-2.6.0-10.el7.centos.aarch64 (linaro-overlay)
           Requires: edk2-aarch64
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest
[root@r3-a1 kvm]# echo $?
1