linux-kernel - Re: [PATCH v9 17/26] x86/resctrl: Implement resctrl_arch_config

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Message-ID: <e108846f-930b-4afd-90c6-2266af96816f@amd.com>
Date: Tue, 19 Nov 2024 14:12:16 -0600
From: "Moger, Babu" <babu.moger@....com>
To: Reinette Chatre <reinette.chatre@...el.com>, corbet@....net,
 tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
 dave.hansen@...ux.intel.com
Cc: fenghua.yu@...el.com, x86@...nel.org, hpa@...or.com, thuth@...hat.com,
 paulmck@...nel.org, rostedt@...dmis.org, akpm@...ux-foundation.org,
 xiongwei.song@...driver.com, pawan.kumar.gupta@...ux.intel.com,
 daniel.sneddon@...ux.intel.com, perry.yuan@....com, sandipan.das@....com,
 kai.huang@...el.com, xiaoyao.li@...el.com, seanjc@...gle.com,
 jithu.joseph@...el.com, brijesh.singh@....com, xin3.li@...el.com,
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 james.morse@....com, tan.shaopeng@...itsu.com, tony.luck@...el.com,
 linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 peternewman@...gle.com, maciej.wieczor-retman@...el.com, eranian@...gle.com,
 jpoimboe@...nel.org, thomas.lendacky@....com
Subject: Re: [PATCH v9 17/26] x86/resctrl: Implement
 resctrl_arch_config_cntr() to assign a counter with ABMC

Hi Reinette,

On 11/15/24 18:44, Reinette Chatre wrote:
> Hi Babu,
> 
> On 10/29/24 4:21 PM, Babu Moger wrote:
>> The ABMC feature provides an option to the user to assign a hardware
>> counter to an RMID, event pair and monitor the bandwidth as long as it is
>> assigned. The assigned RMID will be tracked by the hardware until the user
>> unassigns it manually.
>>
>> Counters are configured by writing to L3_QOS_ABMC_CFG MSR and
>> specifying the counter id, bandwidth source, and bandwidth types.
> 
> needs imperative tone

How about this?

Configure the counters by writing to the L3_QOS_ABMC_CFG MSR and
specifying the counter ID, bandwidth source, and bandwidth types.

> 
>>
>> Provide the interface to assign the counter ids to RMID.
>>
>> The feature details are documented in the APM listed below [1].
>> [1] AMD64 Architecture Programmer's Manual Volume 2: System Programming
>>     Publication # 24593 Revision 3.41 section 19.3.3.3 Assignable Bandwidth
>>     Monitoring (ABMC).
>>
>> Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537
>> Signed-off-by: Babu Moger <babu.moger@....com>
> 
> Reinette
> 

-- 
Thanks
Babu Moger