Subject: Re: [PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online

From: Michael Neuling <[email-masked]>
Date: Wed, 23 Nov 2016 10:35:16 +1100

On Wed, 2016-11-23 at 10:30 +1100, Michael Ellerman wrote:
> "Gautham R. Shenoy" <[email-masked]> writes:
> 
> > From: "Gautham R. Shenoy" <[email-masked]>
> > 
> > Ensure that PSSCR is set to a safe value corresponding to no
> > state-loss each time a POWER9 CPU comes online.
> 
> Is this a bug fix? I can't tell from the change log.

There are no known bugs it's fixing.  

It's just safer to run with a known default value, rather than what we randomly
inherit from previous firmware.

Mikey