linux-kernel - Re: [PATCH 3/7] x86/resctrl: Introduce sdciae_capable in rdt

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Message-ID: <89da43fd-69fb-48a6-830e-e157360aeab6@amd.com>
Date: Wed, 18 Sep 2024 13:22:32 -0500
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, x86@...nel.org
Cc: fenghua.yu@...el.com, hpa@...or.com, paulmck@...nel.org,
 thuth@...hat.com, xiongwei.song@...driver.com, ardb@...nel.org,
 pawan.kumar.gupta@...ux.intel.com, daniel.sneddon@...ux.intel.com,
 sandipan.das@....com, kai.huang@...el.com, peterz@...radead.org,
 kan.liang@...ux.intel.com, pbonzini@...hat.com, xin3.li@...el.com,
 ebiggers@...gle.com, alexandre.chartre@...cle.com, perry.yuan@....com,
 tan.shaopeng@...itsu.com, james.morse@....com, tony.luck@...el.com,
 maciej.wieczor-retman@...el.com, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org, peternewman@...gle.com, eranian@...gle.com
Subject: Re: [PATCH 3/7] x86/resctrl: Introduce sdciae_capable in rdt_resource



On 9/18/24 10:27, Moger, Babu wrote:
> Hi Reinette,
> 
> On 9/13/24 15:45, Reinette Chatre wrote:
>> Hi Babu,
>>
>> On 8/16/24 9:16 AM, Babu Moger wrote:
>>> Detect SDCIAE`(L3 Smart Data Cache Injection Allocation Enforcement)
>>
>> (stray ` char)
> 
> Sure.
> 
>>
>>> feature and initialize sdciae_capable.
>>
>> (This is a repeat of the discussion we had surrounding the ABMC feature.)
>>
>> By adding "sdciae_capable" to struct rdt_resource the "sdciae" feature
>> becomes a resctrl fs feature. Any other architecture that has a "similar
>> but perhaps not identical feature to AMD's SDCIAE" will be forced to also
>> call it "sdciae" ... sdciae seems like a marketing name to me and resctrl
>> needs something generic that could later be built on (if needed) by other
>> architectures.
> 
> How about "cache_inject_capable" ?
> 
> This seems generic. I will change the description also.
> 

Basically, this feature reserves specific CLOS for SDCI cache.

We can also name "clos_reserve_capable".
-- 
Thanks
Babu Moger