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

From: Michael Neuling
Date: Tue Nov 22 2016 - 18:35:45 EST

On Wed, 2016-11-23 at 10:30 +1100, Michael Ellerman wrote:
> "Gautham R. Shenoy" <ego@xxxxxxxxxxxxxxxxxx> writes:
> > From: "Gautham R. Shenoy" <ego@xxxxxxxxxxxxxxxxxx>
> >
> > 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. Â

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