linux-kernel - Re: [PATCH v3 21/38] x86/resctrl: Move mbm_cfg_mask to struct rdt

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Message-ID: <4ae9d344-c950-4b6f-ace7-1c1bf2c0812a@intel.com>
Date: Fri, 28 Jun 2024 09:53:00 -0700
From: Reinette Chatre <reinette.chatre@...el.com>
To: James Morse <james.morse@....com>, <x86@...nel.org>,
	<linux-kernel@...r.kernel.org>
CC: Fenghua Yu <fenghua.yu@...el.com>, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, H Peter Anvin
	<hpa@...or.com>, Babu Moger <Babu.Moger@....com>,
	<shameerali.kolothum.thodi@...wei.com>, 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>, Rex Nie <rex.nie@...uarmicro.com>, Dave
 Martin <dave.martin@....com>, Shaopeng Tan <tan.shaopeng@...fujitsu.com>
Subject: Re: [PATCH v3 21/38] x86/resctrl: Move mbm_cfg_mask to struct
 rdt_resource

Hi James,

On 6/14/24 8:00 AM, James Morse wrote:
> The mbm_cfg_mask field lists the bits that user-space can set when
> configuring an event. This value is output via the last_cmd_status
> file.
> 
> Once the filesystem parts of resctrl are moved to live in /fs/, the
> struct rdt_hw_resource is inaccessible to the filesystem code. Because
> this value is output to user-space, it has to be accessible to the
> filesystem code.
> 
> Move it to struct rdt_resource.

Change looks good. Please do note that there is work in progress to
consolidate the monitoring related data within a new struct that will
impact this change:
https://lore.kernel.org/lkml/8f73c9ec4c9999c262d9297d46a03209a8affe3f.1716552602.git.babu.moger@amd.com/

Reinette