https://wccftech.com/amd-zen-3-cpu-architecture-support-added-to-linux/

It looks like we are getting more closer to the launch of AMD's Zen 3 CPUs as microcode for the upcoming lineup has been added to the Linux Kernel, as spotted by Komachi. The AMD Zen 3 line of processors are aimed to hit in the coming quarters and it looks like they are going to be a bigger upgrade than we have anticipated as many leaks and official representatives have stated.

The latest code adds EDAC (Error Detection and Correction) support for AMD's Family 19h which refers to the Zen 3 architecture while the Zen 2 architecture was referred to as the Family 17h. It also states that the existing Family 17h functions can be used for Family 19h while also allowing family 19h to automatically load the module. The full kernel code can be seen here and here. The timing of this code's appearance is particularly interesting as AMD hasn't yet officially announced any new detail at any major event with CES 2020 being the last where we were expecting to hear more about Zen 3 architecture or the respective products.