linux-kernel - Re: [PATCH v12 02/26] x86/resctrl: Remove MSR reading of event configuration value

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Message-ID: <6be16f07-c066-4076-8ad8-3eefc45c48f7@intel.com>
Date: Fri, 11 Apr 2025 13:50:47 -0700
From: Reinette Chatre <reinette.chatre@...el.com>
To: Babu Moger <babu.moger@....com>, <tony.luck@...el.com>,
	<peternewman@...gle.com>
CC: <corbet@....net>, <tglx@...utronix.de>, <mingo@...hat.com>,
	<bp@...en8.de>, <dave.hansen@...ux.intel.com>, <x86@...nel.org>,
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	<maciej.wieczor-retman@...el.com>, <eranian@...gle.com>
Subject: Re: [PATCH v12 02/26] x86/resctrl: Remove MSR reading of event
 configuration value

Hi Babu,

On 4/3/25 5:18 PM, Babu Moger wrote:
> The event configuration is domain specific and initialized during domain
> initialization. The values are stored in struct rdt_hw_mon_domain.
> 
> It is not required to read the configuration register every time user asks
> for it. Use the value stored in struct rdt_hw_mon_domain instead.

Storing and maintaining the event configuration creates confusion with
the new event configurations introduced in the rest of this series. I
think that it will be simpler to keep BMEC support as-is.

Reinette