Ryzen issues on FreeBSD ? (with sort of workaround)

[Konstantin Belousov]

On Tue, Jul 03, 2018 at 10:27:06AM +0100, Pete French wrote:
> 
> > 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.
> >
> 
> I just did some testing - it does do these bits:
By 'it' you mean the microcode update/BIOS on your board ?

> 
> 
>          cpucontrol -m '0xc0011029|=0x2000' $x
>          cpucontrol -m '0xc0011020|=0x10' $x
> 
> but it does not do these bits:
> 
>          cpucontrol -m '0xc0011028|=0x10' $x
>          cpucontrol -m '0xc0011020|=0x200000000000000' $x
> 
> (though someone else might want to doubel check that as I may have 
> miscounted the bits!)
> 
> am going to trey your patch today
> 
> -pete.