linux-kernel - Re: [PATCH v9 07/27] x86/resctrl: Add end-marker to the resctrl_event

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Message-ID: <6f793113-5789-4fee-acca-14d144844fc6@intel.com>
Date: Thu, 1 May 2025 10:03:34 -0700
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>, <fenghuay@...dia.com>
Subject: Re: [PATCH v9 07/27] x86/resctrl: Add end-marker to the
 resctrl_event_id enum

Hi James,

On 4/25/25 10:37 AM, James Morse wrote:
> The resctrl_event_id enum gives names to the counter event numbers on x86.
> These are used directly by resctrl.
> 
> To allow the MPAM driver to keep an array of these the size of the enum
> needs to be known.
> 
> Add a 'num_events' enum entry which can be used to size an array.
> This is added to the enum to reduce conflicts with another series,
> which in turn requires get_arch_mbm_state() to have a default case.
> 
> Signed-off-by: James Morse <james.morse@....com>
> ---

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

Reinette