linux-kernel - Re: [PATCH v3] topology: make core_mask include at least cluster

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Message-ID: <fc0d66cb-a8f8-578c-61ae-c45c167ab55a@arm.com>
Date:   Wed, 16 Mar 2022 15:42:55 +0100
From:   Dietmar Eggemann <dietmar.eggemann@....com>
To:     Darren Hart <darren@...amperecomputing.com>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>,
        Will Deacon <will@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Arm <linux-arm-kernel@...ts.infradead.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Catalin Marinas <Catalin.Marinas@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Barry Song <song.bao.hua@...ilicon.com>,
        Valentin Schneider <Valentin.Schneider@....com>,
        "D . Scott Phillips" <scott@...amperecomputing.com>,
        Ilkka Koskinen <ilkka@...amperecomputing.com>,
        stable@...r.kernel.org
Subject: Re: [PATCH v3] topology: make core_mask include at least
 cluster_siblings

On 14/03/2022 17:56, Darren Hart wrote:
> On Mon, Mar 14, 2022 at 10:37:21AM +0100, Dietmar Eggemann wrote:
>> On 09/03/2022 19:26, Darren Hart wrote:
>>> On Wed, Mar 09, 2022 at 01:50:07PM +0100, Dietmar Eggemann wrote:
>>>> On 08/03/2022 18:49, Darren Hart wrote:
>>>>> On Tue, Mar 08, 2022 at 05:03:07PM +0100, Dietmar Eggemann wrote:
>>>>>> On 08/03/2022 12:04, Vincent Guittot wrote:
>>>>>>> On Tue, 8 Mar 2022 at 11:30, Will Deacon <will@...nel.org> wrote:

[...]

>>> Thank you, I'm following internally and will get with you.
>>
>> Looks like in my PPTT, the `Processor Hierarchy Nodes` which represents
>> cluster nodes have no valid `ACPI Processor ID`.
> 
> Thanks, I'm looking for the right person to get us the latest information
> available this. Will follow up once I have.

We're installing the new FW on our machine right now. Should see the CLS
SD level w/o hacking find_acpi_cpu_topology_cluster() then ;-)