From: Stewart Smith <stewart@linux.vnet.ibm.com>
To: Michael Neuling <mikey@neuling.org>, mpe@ellerman.id.au
Cc: Michael Neuling <mikey@neuling.org>,
linuxppc-dev@lists.ozlabs.org,
Nicholas Piggin <npiggin@gmail.com>
Subject: Re: [PATCH] powerpc: Invalidate ERAT on powersave wakeup for POWER9
Date: Fri, 23 Jun 2017 10:50:23 +1000 [thread overview]
Message-ID: <87lgojy1bk.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <20170622172616.7598-1-mikey@neuling.org>
Michael Neuling <mikey@neuling.org> writes:
> On POWER9 the ERAT may be incorrect on wakeup from some stop states
> that lose state. This causes random segvs and illegal instructions
> when these stop states are enabled.
>
> This patch invalidates the ERAT on wakeup on POWER9 to prevent this
> from causing a problem.
>
> Signed-off-by: Michael Neuling <mikey@neuling.org>
CC: stable?
--
Stewart Smith
OPAL Architect, IBM.
next prev parent reply other threads:[~2017-06-23 0:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-22 17:26 [PATCH] powerpc: Invalidate ERAT on powersave wakeup for POWER9 Michael Neuling
2017-06-23 0:50 ` Stewart Smith [this message]
2017-06-23 2:12 ` Michael Neuling
2017-06-23 3:09 ` Michael Neuling
2017-06-23 9:33 ` Michael Ellerman
2017-06-23 10:24 ` Nicholas Piggin
2017-06-23 10:45 ` Benjamin Herrenschmidt
2017-06-23 10:22 ` Anshuman Khandual
2017-06-24 17:29 ` [PATCH v2] " Benjamin Herrenschmidt
2017-06-25 5:18 ` Nicholas Piggin
2017-06-29 12:21 ` [v2] " Michael Ellerman
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