On Mon, Jul 24, 2023 at 03:17:26PM -0700, Courtney wrote:
> $ pkg_info | grep amd
> amd-firmware-20230719 microcode update binaries for AMD CPUs

It by no means covers all zen 2 models.
See /etc/firmware/amd/README

  Family=0x17 Model=0x31 Stepping=0x00: Patch=0x0830107a Length=3200 bytes
  Family=0x17 Model=0xa0 Stepping=0x00: Patch=0x08a00008 Length=3200 bytes

17-31-00 Rome/Castle Peak       0x0830107a
17-a0-00 Mendocino              0x08a00008

The family-model-stepping is printed at the end of cpu lines in dmesg.

Zen2 models missing include:

17-60-01 Renoir                 0x0860010b
17-68-01 Lucienne               0x08608105
17-71-00 Matisse                0x08701032
17-90-02 Van Gogh

The known good patch levels are used by xen and linux.  But the
microcode for Renoir, Lucienne and Matisse is not available as far as
I can tell.

An updated kernel will set DE_CFG bit 9 on all Zen2 models,
which does not require new microcode.

> I however, do not have the test code to check if you are impacted by
> Zenbleed or not. There is test code, but it only compiles on Linux.
> Theo de Raadt also put out info if you are doing syspatch for the new
> errata.
> https://marc.info/?l=openbsd-tech&m=169021508718971&w=2
> Courtney
> On 7/23/23 23:02, Christer Solskogen wrote:
> > I just saw https://undeadly.org/cgi?action=article;sid=20230723185853
> > and was wondering how I can check if it works? Does or should the
> > microcode update show up in dmesg or in some other log?
> > 

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