linux-kernel - Re: [PATCH v1 16/31] x86/resctrl: Change mon_event_config

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Message-ID: <8bc4cc50-ca1d-404b-9cb2-db31c89fbb13@intel.com>
Date: Mon, 8 Apr 2024 20:20:41 -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>
Subject: Re: [PATCH v1 16/31] x86/resctrl: Change
 mon_event_config_{read,write}() to be arch helpers

Hi James,

On 3/21/2024 9:50 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 the restrl_types

Looks like this change is actually moving the struct into include/linux/resctrl.h,
not resctrl_types.h.

> header. 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.
> 
> Signed-off-by: James Morse <james.morse@....com>

..

> diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
> index bfc63e8219e5..975b80102fbe 100644
> --- a/include/linux/resctrl.h
> +++ b/include/linux/resctrl.h
> @@ -192,6 +192,13 @@ struct resctrl_cpu_sync {
>  	u32 rmid;
>  };
>  
> +struct resctrl_mon_config_info {
> +	struct rdt_resource *r;
> +	struct rdt_domain   *d;
> +	u32                  evtid;
> +	u32                  mon_config;
> +};
> +

Please use tabs consistently in this file.

Reinette