linux-kernel - Re: powernv:idle: Set NAPSTATELOST after recovering paca on P9 DD1

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Date:   Wed, 17 May 2017 19:34:37 +1000 (AEST)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Michael Neuling <mikey@...ling.org>,
        Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
        Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>,
        Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>
Cc:     "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: powernv:idle: Set NAPSTATELOST after recovering paca on P9 DD1

On Fri, 2017-05-12 at 09:22:06 UTC, "Gautham R. Shenoy" wrote:
> From: "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
> 
> commit 17ed4c8f81da ("powerpc/powernv: Recover correct PACA on wakeup
> from a stop on P9 DD1") promises to set the NAPSTATELOST bit in paca
> after recovering the correct paca for the thread waking up from stop1
> on DD1, so that the GPRs can be correctly restored on the stop exit
> path. However, it loads the value 1 into r3, but stores the value in
> r0 into NAPSTATELOST(r13).
> 
> Fix this by correctly set the NAPSTATELOST bit in paca after
> recovering the paca on POWER9 DD1.
> 
> Fixes: commit 17ed4c8f81da ("powerpc/powernv: Recover correct PACA on wakeup
> from a stop on P9 DD1")
> 
> Signed-off-by: Gautham R. Shenoy <ego@...ux.vnet.ibm.com>
> Reviewed-by: Nicholas Piggin <npiggin@...il.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/bbb075ddf7d58762040ca413ad82e9

cheers