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

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Date: Thu, 11 Apr 2024 15:16:32 +0100
From: Dave Martin <Dave.Martin@....com>
To: Reinette Chatre <reinette.chatre@...el.com>
Cc: James Morse <james.morse@....com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, 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>
Subject: Re: [PATCH v1 16/31] x86/resctrl: Change
 mon_event_config_{read,write}() to be arch helpers

On Mon, Apr 08, 2024 at 08:20:41PM -0700, Reinette Chatre wrote:
> 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.

Noted.

> 
> > 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
> 

Noted; I have presumed that you mean tabs-only indentation before the
member declarator, and to line up the declarators (including the *),
e.g.:

struct resctrl_mon_config_info {
	struct rdt_resource	*r;
	struct rdt_domain	*d;
	u32			evtid;
	u32			mon_config;
};

(But if that's not what you meant, please shout!)

Cheers
---Dave