Ahead of the Zen 2 processors expected in 2019, it appears AMD developers have begun working on their Linux kernel support patches for these next-generation CPUs. In particular, it appears the flow of Linux kernel code for supporting EPYC 2 "Rome" processors has begun.
Sent into the mainline Linux kernel this morning were the EDAC updates for Linux 4.20~5.0. EDAC in this context is for Error Detection And Correction - error reporting functionality mostly useful for server/workstation platforms. Usually the EDAC changes aren't worth writing about on Phoronix, but I did notice one of the changes standing out: "Add Family 17h, models 10h-2fh support."