linux-kernel - Re: [PATCH v3 09/29] arm_mpam: Add MPAM MSC register layout definitions

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Message-ID: <6380b1a2-45ea-4a7f-a1db-81d92442fca8@arm.com>
Date: Mon, 27 Oct 2025 16:33:14 +0000
From: Ben Horgan <ben.horgan@....com>
To: Jonathan Cameron <jonathan.cameron@...wei.com>,
 James Morse <james.morse@....com>
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-acpi@...r.kernel.org,
 D Scott Phillips OS <scott@...amperecomputing.com>,
 carl@...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>, Dave Martin <dave.martin@....com>,
 Koba Ko <kobak@...dia.com>, Shanker Donthineni <sdonthineni@...dia.com>,
 fenghuay@...dia.com, baisheng.gao@...soc.com, Rob Herring <robh@...nel.org>,
 Rohit Mathew <rohit.mathew@....com>, Rafael Wysocki <rafael@...nel.org>,
 Len Brown <lenb@...nel.org>, Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Hanjun Guo <guohanjun@...wei.com>, Sudeep Holla <sudeep.holla@....com>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Danilo Krummrich <dakr@...nel.org>, Jeremy Linton <jeremy.linton@....com>,
 Gavin Shan <gshan@...hat.com>
Subject: Re: [PATCH v3 09/29] arm_mpam: Add MPAM MSC register layout
 definitions

Hi James, Jonathan,

On 10/24/25 18:32, Jonathan Cameron wrote:
> On Fri, 17 Oct 2025 18:56:25 +0000
> James Morse <james.morse@....com> wrote:
> 
>> Memory Partitioning and Monitoring (MPAM) has memory mapped devices
>> (MSCs) with an identity/configuration page.
>>
>> Add the definitions for these registers as offset within the page(s).
>>
>> Link: https://developer.arm.com/documentation/ihi0099/latest/
> 
> I can't figure out how to get a stable link when there is only
> one version.  If possible would be good to use one.
> 
> I guess it probably doesn't matter unless someone renames things as
> you only have as subset of the fields currently there for some registers.
> 
https://developer.arm.com/documentation/ihi0099/aa/

This link has the version, A.a, at the end so should be stable. I found
this by visiting an unknown version,
https://developer.arm.com/documentation/ihi0099/unknown/, and seeing
where it redirects.

Thanks,

Ben