Ryzen

Ryzen is Zen microarchitecture.]] Its goal is to directly compete with Intel's Broadwell-E processor line, primarily the Core i7-6900K.

Firmware
Microcode/firmware updates to be determined...

Kernel
Enable support for Ryzen hardware in kernel 4.11.0:

If you use gentoo-sources with the  USE flag, additional Processor family options are available

This enables -march=znver1 for the kernel make process

GCC 6.3+
GCC 6.3+ has support for the  compiler optimization. For optimal performance, this can be enabled in.

GCC 6.3 is not presently optimized for Ryzen.

GCC 5.4
While GCC 5.4 does not support zen core specific optimization,  has been shown to be functional and stable:

External resources

 * http://www.phoronix.com/scan.php?page=article&item=amd-ryzen-znver1&num=1 - Phoronix compiler optimization benchmarks for Ryzen 7.