The DMTF made a small update to the SMBIOS Spec recently (January 2017), and in the process bumped the version number from 3.1.0 to 3.1.1. The update is mainly noteworthy to those developing on AMD-based systems.
The Type 4 table (Processor Information) gets support for the AMD Zen processor family, along with its new SP3r2 socket.
The Type 42 table gets a small update to add enumerations defining the various management controller host interfaces.
These changes have also been incorporated into the EDKII:
SMBIOS v3.1.1, Direct Download