linux-kernel - Re: [RFC PATCH 05/36] ACPI / PPTT: Add a helper to fill a cpumask from a processor container

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Message-ID: <1097d0cf-deb7-4247-93eb-2fe8b23dbd6c@arm.com>
Date: Fri, 25 Jul 2025 18:05:58 +0100
From: James Morse <james.morse@....com>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 Rob Herring <robh@...nel.org>, Ben Horgan <ben.horgan@....com>,
 Rohit Mathew <rohit.mathew@....com>,
 Shanker Donthineni <sdonthineni@...dia.com>, Zeng Heng
 <zengheng4@...wei.com>, Lecopzer Chen <lecopzerc@...dia.com>,
 Carl Worth <carl@...amperecomputing.com>,
 shameerali.kolothum.thodi@...wei.com,
 D Scott Phillips OS <scott@...amperecomputing.com>, lcherian@...vell.com,
 bobo.shaobowang@...wei.com, tan.shaopeng@...itsu.com,
 baolin.wang@...ux.alibaba.com, Jamie Iles <quic_jiles@...cinc.com>,
 Xin Hao <xhao@...ux.alibaba.com>, peternewman@...gle.com,
 dfustini@...libre.com, amitsinght@...vell.com,
 David Hildenbrand <david@...hat.com>, Rex Nie <rex.nie@...uarmicro.com>,
 Dave Martin <dave.martin@....com>, Koba Ko <kobak@...dia.com>,
 Sudeep Holla <sudeep.holla@....com>
Subject: Re: [RFC PATCH 05/36] ACPI / PPTT: Add a helper to fill a cpumask
 from a processor container

Hi Jonathan,

On 22/07/2025 15:28, Jonathan Cameron wrote:
> On Fri, 11 Jul 2025 18:36:17 +0000
> James Morse <james.morse@....com> wrote:
> 
>> The PPTT describes CPUs and caches, as well as processor containers.
>> The ACPI table for MPAM describes the set of CPUs that can access an MSC
>> with the UID of a processor container.
>>
>> Add a helper to find the processor container by its id, then walk
>> the possible CPUs to fill a cpumask with the CPUs that have this
>> processor container as a parent.

>> +/**
>> + * acpi_pptt_get_cpus_from_container() - Populate a cpumask with all CPUs in a
>> + *                                       processor containers
>> + * @acpi_cpu_id:	The UID of the processor container.
>> + * @cpus		The resulting CPU mask.

> Missing colon.
> 
> From a W=1 build (and hence kernel-doc warning).

Thanks!

W=1 spews so much output I tend to rely on the kbuild robot to report if I'm making it worse!


James