linux-kernel - Re: [PATCH v6 20/42] x86/resctrl: Change mon_event_config

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Message-ID: <48af17e9-7a64-43a5-850e-25f1596bca8c@intel.com>
Date: Wed, 19 Feb 2025 16:37:49 -0800
From: Reinette Chatre <reinette.chatre@...el.com>
To: James Morse <james.morse@....com>, <x86@...nel.org>,
	<linux-kernel@...r.kernel.org>
CC: 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>, Koba Ko <kobak@...dia.com>, Shanker
 Donthineni <sdonthineni@...dia.com>, Shaopeng Tan
	<tan.shaopeng@...fujitsu.com>, "Tony Luck" <tony.luck@...el.com>
Subject: Re: [PATCH v6 20/42] x86/resctrl: Change
 mon_event_config_{read,write}() to be arch helpers

Hi James,

On 2/7/25 10:18 AM, James Morse wrote:
> mon_event_config_{read,write}() are called via IPI and access model
> specific registers to do their work.
> 
> To support another architecture, this needs abstracting.
> 
> Rename mon_event_config_{read,write}() to have a "resctrl_arch_"
> prefix, and move their struct mon_config_info parameter into
> <linux/resctrl.h>.  This allows another architecture to supply an
> implementation of these.
> 
> As struct mon_config_info is now exposed globally, give it a 'resctrl_'
> prefix. MPAM systems need access to the domain to do this work, add
> the resource and domain to struct resctrl_mon_config_info.
> 
> Co-developed-by: Dave Martin <Dave.Martin@....com>
> Signed-off-by: Dave Martin <Dave.Martin@....com>
> Signed-off-by: James Morse <james.morse@....com>
> Tested-by: Carl Worth <carl@...amperecomputing.com> # arm64
> Tested-by: Shaopeng Tan <tan.shaopeng@...fujitsu.com>
> Reviewed-by: Shaopeng Tan <tan.shaopeng@...fujitsu.com>
> Reviewed-by: Tony Luck <tony.luck@...el.com>
> ---

Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>

Reinette