linux-kernel - Re: [PATCH v12 16/31] x86,fs/resctrl: Add architectural event pointer

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Message-ID: <090a9b56-c714-4a5f-bf33-41f47e29bb4d@intel.com>
Date: Wed, 22 Oct 2025 21:34:27 -0700
From: Reinette Chatre <reinette.chatre@...el.com>
To: Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghuay@...dia.com>, "Maciej
 Wieczor-Retman" <maciej.wieczor-retman@...el.com>, Peter Newman
	<peternewman@...gle.com>, James Morse <james.morse@....com>, Babu Moger
	<babu.moger@....com>, Drew Fustini <dfustini@...libre.com>, Dave Martin
	<Dave.Martin@....com>, Chen Yu <yu.c.chen@...el.com>
CC: <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
	<patches@...ts.linux.dev>
Subject: Re: [PATCH v12 16/31] x86,fs/resctrl: Add architectural event pointer

Hi Tony,

On 10/13/25 3:33 PM, Tony Luck wrote:
> The resctrl file system layer passes the domain, RMID, and event id to the
> architecture to fetch an event counter.
> 
> Fetching a telemetry event counter requires additional information that is
> private to the architecture, for example, the offset into MMIO space from
> where the counter should be read.
> 
> Add mon_evt::arch_priv that architecture can use for any private data
> related to the event. resctrl filesystem initializes mon_evt::arch_priv
> when the architecture enables the event and passes it back to architecture
> when needing to fetch an event counter.
> 
> Suggested-by: Reinette Chatre <reinette.chatre@...el.com>
> Signed-off-by: Tony Luck <tony.luck@...el.com>
> ---

This will need to be rebased, but that should be straight forward.

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

Reinette