Pictured above is my 64 bit ARM server. It’s under NDA so I cannot tell you who supplied it or even show you a proper photo.
However it runs Fedora 21 & Rawhide:
Linux arm64.home.annexia.org 3.16.0-0.rc6.git1.1.efirtcfix1.fc22.aarch64 #1 SMP Wed Jul 23 12:15:58 BST 2014 aarch64 aarch64 aarch64 GNU/Linux
libvirt and libguestfs run fine, with full KVM acceleration, although right now you have to use qemu from git as the Rawhide version of qemu is not new enough.
Also OCaml 4.02.0 beta works (after we found and fixed a few bugs in the arm64 native code generator last week).