Supported platforms

IBM z Systems version 10 and up, in 64-bit flat addressing mode, running Linux (Debian architecture: s390x).

Reference documents

Instruction set architecture: z/Architecture Principles of Operation, SA22-7832-07, eight edition (Feb 2009). This is the version that corresponds to z10. Newer versions of this manual include additional instructions that are not in z10.
ELF ABI: zSeries ELF Application Binary Interface Supplement (http://refspecs.linuxfoundation.org/ELF/zSeries/index.html)