From: Balbir Singh <bsingharora@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call
Date: Wed, 8 Jun 2016 11:14:16 +1000 [thread overview]
Message-ID: <70305fb4-d345-bd89-e395-04c39b266fe4@gmail.com> (raw)
In-Reply-To: <1464690745.23025.2.camel@ellerman.id.au>
On 31/05/16 20:32, Michael Ellerman wrote:
> On Tue, 2016-05-31 at 12:19 +0200, Thomas Huth wrote:
>> 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?
>
> Thanks, I'll add them here.
Don't we need to update IBM_ARCH_VEC_NRCORES_OFFSET as well?
Balbir Singh
next prev parent reply other threads:[~2016-06-08 1:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-31 5:51 [PATCH] powerpc/pseries: Add POWER8NVL support to ibm, client-architecture-support call Thomas Huth
2016-05-31 10:04 ` [PATCH] powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call Michael Ellerman
2016-05-31 10:19 ` Thomas Huth
2016-05-31 10:32 ` Michael Ellerman
2016-06-08 1:14 ` Balbir Singh [this message]
2016-06-08 10:44 ` Michael Ellerman
2016-06-08 11:17 ` Thomas Huth
2016-06-08 11:27 ` Michael Ellerman
2016-06-08 10:58 ` Thomas Huth
2016-06-06 0:17 ` powerpc/pseries: Add POWER8NVL support to ibm, client-architecture-support call Michael Ellerman
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