Current status of Ryzen (non-)support

[Konstantin Belousov]

On Sun, Oct 21, 2018 at 06:09:50PM +0200, Hannes Hauswedell wrote:
> Hi everyone,
> 
> I wanted to ask what the current status of Ryzen support is and/or
> whether any new changes are planned.
> 
> My situation:
> * second generation Ryzen: 2600X
> * running -CURRENT
> * I have done the things described here:
> https://lists.freebsd.org/pipermail/freebsd-current/2018-June/069799.html
This was based on the public errata document for the first gen ryzen.
I am not aware of the erratas ('revision guides' in AMD terminology)
for the second gen ryzens.

For now you can only get fixes for microcode from your BIOS updates.

> * no full system freezes, but under load, e.g. building with 12 threads,
> programs start to segfault.
> * memtest86 ran through without issues
> * on a Linux dual boot I haven't had any issues
Or look at the Linux sources and see if any workarounds are applied
and chicken bits are set for your CPU.

> 
> Is this a known problem? Anythings I can do about it? I thought the
> Ryzen problem were only supposed to happen with first generation CPUs...
> 
> Thanks and regards,
> Hannes
>