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

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Message-ID: <254da029-81b2-4745-bc78-5aefeb33adb0@intel.com>
Date: Fri, 13 Sep 2024 13:45:54 -0700
From: Reinette Chatre <reinette.chatre@...el.com>
To: Babu Moger <babu.moger@....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

Hi Babu,

On 8/16/24 9:16 AM, Babu Moger wrote:
> Detect SDCIAE`(L3 Smart Data Cache Injection Allocation Enforcement)

(stray ` char)

> 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.

Reinette