Spacewalk/Satellite 2.0.x has support for a number of different architectures including ARM soft/hard FP. It would be useful to add aarch64 as an architecture option to the list of Architectures when creating a Software Channel in Spacewalk. The 64 bit ARM architecture is called aarch64. The rpm suffix is .aarch64.rpm Let me know if you need any more information
Added to spacewalk master by commit 413d6557696093d10a6bfcf5a2801aead15bb847 1055969 - schema upgrade for ARM aarch64 architecture support commit 4ca37a806e9bc72ac4e871eeadd7fa6fb9a213df 1055969 - support for ARM aarch64 architecture
Missed rhnServerArch insert commit 29b707bcd0e75f8d20605916413bf1d310dc4a7d 1055969 - missing aarch64 in rhnServerArch
Spacewalk 2.2 has been released: https://fedorahosted.org/spacewalk/wiki/ReleaseNotes22