From: Michael Neuling <mikey@neuling.org>
To: Michael Ellerman <mpe@ellerman.id.au>,
"Gautham R. Shenoy" <ego@linux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
"Shreyas B. Prabhu" <shreyasbp@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online
Date: Wed, 23 Nov 2016 10:35:16 +1100 [thread overview]
Message-ID: <1479857716.6542.60.camel@neuling.org> (raw)
In-Reply-To: <87bmx7um7s.fsf@concordia.ellerman.id.au>
On Wed, 2016-11-23 at 10:30 +1100, Michael Ellerman wrote:
> "Gautham R. Shenoy" <ego@linux.vnet.ibm.com> writes:
>=20
> > From: "Gautham R. Shenoy" <ego@linux.vnet.ibm.com>
> >=20
> > Ensure that PSSCR is set to a safe value corresponding to no
> > state-loss each time a POWER9 CPU comes online.
>=20
> Is this a bug fix? I can't tell from the change log.
There are no known bugs it's fixing. =C2=A0
It's just safer to run with a known default value, rather than what we rand=
omly
inherit from previous firmware.
Mikey
next prev parent reply other threads:[~2016-11-22 23:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-22 18:06 [PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online Gautham R. Shenoy
2016-11-22 23:30 ` Michael Ellerman
2016-11-22 23:35 ` Michael Neuling [this message]
2016-11-23 0:32 ` Michael Neuling
2016-11-28 12:15 ` Michael Ellerman
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