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 2F046C43142 for ; Sat, 23 Jun 2018 12:08:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E5D3D24BAA for ; Sat, 23 Jun 2018 12:08:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E5D3D24BAA 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 S1751923AbeFWMIU (ORCPT ); Sat, 23 Jun 2018 08:08:20 -0400 Received: from terminus.zytor.com ([198.137.202.136]:36857 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751223AbeFWMIT (ORCPT ); Sat, 23 Jun 2018 08:08:19 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id w5NC8DiD463243 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sat, 23 Jun 2018 05:08:13 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id w5NC8D7u463240; Sat, 23 Jun 2018 05:08:13 -0700 Date: Sat, 23 Jun 2018 05:08:13 -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: mingo@kernel.org, hpa@zytor.com, tglx@linutronix.de, linux-kernel@vger.kernel.org, reinette.chatre@intel.com Reply-To: mingo@kernel.org, hpa@zytor.com, tglx@linutronix.de, reinette.chatre@intel.com, linux-kernel@vger.kernel.org In-Reply-To: <87e88275597fbfa03ea9d41c1186bf012c831c01.1529706536.git.reinette.chatre@intel.com> References: <87e88275597fbfa03ea9d41c1186bf012c831c01.1529706536.git.reinette.chatre@intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/cache] x86/intel_rdt: Introduce RDT resource group mode Git-Commit-ID: eb956a636f90bd0297309a7eae6db388ae5bfc43 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: eb956a636f90bd0297309a7eae6db388ae5bfc43 Gitweb: https://git.kernel.org/tip/eb956a636f90bd0297309a7eae6db388ae5bfc43 Author: Reinette Chatre AuthorDate: Fri, 22 Jun 2018 15:41:54 -0700 Committer: Thomas Gleixner CommitDate: Sat, 23 Jun 2018 13:03:40 +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/87e88275597fbfa03ea9d41c1186bf012c831c01.1529706536.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 be152b3b2543..fef254e85da4 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