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Date: Sun, 1 Jul 2018 13:55:40 +0300
From: Konstantin Belousov <kostikbel@gmail.com>
To: Pete French <petefrench@ingresso.co.uk>
Cc: avg@freebsd.org, eric@vangyzen.net, freebsd-stable@freebsd.org,
 freebsd@hda3.com, mike@sentex.net, truckman@FreeBSD.org
Subject: Re: Ryzen issues on FreeBSD ? (with sort of workaround)
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On Sun, Jul 01, 2018 at 11:15:56AM +0100, Pete French wrote:
> > This should be the kernel patch equivalent to the script.
> 
> Ah, thankyou. I shall give this a try on tuesday when I am
> physically back in front of the machine. I have been trying without
> the oath as you asked by the way, and with the latest microcode
> update (0x8001137) it also seems stable, without these tweaks. But I
> havent stressed it too much - if the errata says to set the bits then
> we should set the bits.

It is very likely that the latest microcode sets the chicken bits for the
known erratas already.  AFAIK, this is the best that a ucode update
can typically do anyway.