linux-kernel - Re: [PATCH v11 11/30] x86/resctrl: Add end-marker to the resctrl_event

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Message-ID: <e637ccd7-9ac4-4df0-8ae8-2648ad737ae5@nvidia.com>
Date: Wed, 14 May 2025 17:09:08 -0700
From: Fenghua Yu <fenghuay@...dia.com>
To: James Morse <james.morse@....com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Cc: Reinette Chatre <reinette.chatre@...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>, Koba Ko <kobak@...dia.com>,
 Shanker Donthineni <sdonthineni@...dia.com>,
 Shaopeng Tan <tan.shaopeng@...fujitsu.com>
Subject: Re: [PATCH v11 11/30] x86/resctrl: Add end-marker to the
 resctrl_event_id enum


On 5/13/25 10:15, 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>
> Tested-by: Babu Moger <babu.moger@....com>
> Tested-by: Shaopeng Tan <tan.shaopeng@...fujitsu.com>
> Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>

Reviewed-by: Fenghua Yu <fenghuay@...dia.com>

Thanks.

-Fenghua