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Subject: Re: [PATCH] powerpc/pseries: Add POWER8NVL support to
 ibm,client-architecture-support call
To: Michael Ellerman <mpe@ellerman.id.au>, Paul Mackerras <paulus@samba.org>,
 linuxppc-dev@lists.ozlabs.org
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 <1464689047.23025.1.camel@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>, kvm-ppc@vger.kernel.org
From: Thomas Huth <thuth@redhat.com>
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Date: Tue, 31 May 2016 12:19:53 +0200
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On 31.05.2016 12:04, Michael Ellerman wrote:
> On Tue, 2016-05-31 at 07:51 +0200, Thomas Huth wrote:
> 
>> If we do not provide the PVR for POWER8NVL, a guest on this
>> system currently ends up in PowerISA 2.06 compatibility mode on
>> KVM, since QEMU does not provide a generic PowerISA 2.07 mode yet.
>> So some new instructions from POWER8 (like "mtvsrd") get disabled
>> for the guest, resulting in crashes when using code compiled
>> explicitly for POWER8 (e.g. with the "-mcpu=power8" option of GCC).
>>
>> Signed-off-by: Thomas Huth <thuth@redhat.com>
> 
> So this should say:
> 
>   Fixes: ddee09c099c3 ("powerpc: Add PVR for POWER8NVL processor")
> 
> And therefore:
> 
>   Cc: stable@vger.kernel.org # v4.0+
> 
> Am I right?

Right. (At least for virtualized systems ... for bare-metal systems,
that original patch was enough). So shall I resubmit my patch with these
two lines, or could you add them when you pick this patch up?

 Thomas