Re: Zenbleed

In reply to: Konstantin Belousov : "Re: Zenbleed"
Go to: [ bottom of page ] [ top of archives ] [ this month ]

From: Thomas Hurst <tom_at_hur.st>
Date: Sun, 30 Jul 2023 16:45:56 UTC

* Konstantin Belousov (kostikbel@gmail.com) wrote:

> On Wed, Jul 26, 2023 at 08:34:56PM +0000, 0x1eef wrote:
> > Hello,
> > 
> > I was curious if there are plans to apply the "chicken bit" 
> > workaround for the Ryzen line of processors. A firmware
> > update is not scheduled to be released until Nov or Dec 
> > at the earliest. Thanks.
> 
> The chicken bit workaround is
> # for x in /dev/cpuctl*; do cpucontrol -m '0xc0011029|=0x200' $x; done 
> there is nothing to wait for.  It is silly to push this into kernel when
> recommended solution is ucode update.

I created an rc script for this, including a check that the system is
actually running a Zen 2 CPU:

  https://gist.github.com/Freaky/2560975d3c94246b86f464b8be75c967

-- 
Thomas 'Freaky' Hurst
    https://hur.st/