From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E5C7AC1B0F1 for ; Wed, 20 Jun 2018 00:13:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A80EC20693 for ; Wed, 20 Jun 2018 00:13:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A80EC20693 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zytor.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753938AbeFTANj (ORCPT ); Tue, 19 Jun 2018 20:13:39 -0400 Received: from terminus.zytor.com ([198.137.202.136]:41537 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751655AbeFTANg (ORCPT ); Tue, 19 Jun 2018 20:13:36 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id w5K0DV793296201 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 19 Jun 2018 17:13:31 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id w5K0DVu23296198; Tue, 19 Jun 2018 17:13:31 -0700 Date: Tue, 19 Jun 2018 17:13:31 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Reinette Chatre Message-ID: Cc: linux-kernel@vger.kernel.org, mingo@kernel.org, reinette.chatre@intel.com, tglx@linutronix.de, hpa@zytor.com Reply-To: mingo@kernel.org, reinette.chatre@intel.com, linux-kernel@vger.kernel.org, hpa@zytor.com, tglx@linutronix.de In-Reply-To: References: To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/cache] x86/intel_rdt: Introduce RDT resource group mode Git-Commit-ID: c4ccc8b90dfe244361db195bcac376fe1ad5f31a X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: c4ccc8b90dfe244361db195bcac376fe1ad5f31a Gitweb: https://git.kernel.org/tip/c4ccc8b90dfe244361db195bcac376fe1ad5f31a Author: Reinette Chatre AuthorDate: Tue, 29 May 2018 05:57:27 -0700 Committer: Thomas Gleixner CommitDate: Wed, 20 Jun 2018 00:56:27 +0200 x86/intel_rdt: Introduce RDT resource group mode At this time there are no constraints on how bitmasks represented by schemata can be associated with closids represented by resource groups. A bitmask of one class of service can without any objections overlap with the bitmask of another class of service. The concept of "mode" is introduced in preparation for support of control over whether cache regions can be shared between classes of service. At this time the only mode reflects the current cache allocations where all can potentially be shared. Signed-off-by: Reinette Chatre Signed-off-by: Thomas Gleixner Cc: fenghua.yu@intel.com Cc: tony.luck@intel.com Cc: vikas.shivappa@linux.intel.com Cc: gavin.hindman@intel.com Cc: jithu.joseph@intel.com Cc: dave.hansen@intel.com Cc: hpa@zytor.com Link: https://lkml.kernel.org/r/ccdbc11e14508ce3800ac4370e788374d3855aee.1527593970.git.reinette.chatre@intel.com --- arch/x86/kernel/cpu/intel_rdt.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h index 39752825e376..c08eee73ecd3 100644 --- a/arch/x86/kernel/cpu/intel_rdt.h +++ b/arch/x86/kernel/cpu/intel_rdt.h @@ -80,6 +80,22 @@ enum rdt_group_type { RDT_NUM_GROUP, }; +/** + * enum rdtgrp_mode - Mode of a RDT resource group + * @RDT_MODE_SHAREABLE: This resource group allows sharing of its allocations + * + * The mode of a resource group enables control over the allowed overlap + * between allocations associated with different resource groups (classes + * of service). User is able to modify the mode of a resource group by + * writing to the "mode" resctrl file associated with the resource group. + */ +enum rdtgrp_mode { + RDT_MODE_SHAREABLE = 0, + + /* Must be last */ + RDT_NUM_MODES, +}; + /** * struct mongroup - store mon group's data in resctrl fs. * @mon_data_kn kernlfs node for the mon_data directory