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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 68CA7ECE564 for ; Tue, 18 Sep 2018 21:45:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 27DBB20C0E for ; Tue, 18 Sep 2018 21:45:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 27DBB20C0E 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 S1730571AbeISDUS (ORCPT ); Tue, 18 Sep 2018 23:20:18 -0400 Received: from terminus.zytor.com ([198.137.202.136]:33495 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727811AbeISDUS (ORCPT ); Tue, 18 Sep 2018 23:20:18 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id w8ILjfJk930418 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 18 Sep 2018 14:45:41 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id w8ILjfp1930415; Tue, 18 Sep 2018 14:45:41 -0700 Date: Tue, 18 Sep 2018 14:45:41 -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, hpa@zytor.com, tglx@linutronix.de, xiaochen.shen@intel.com, reinette.chatre@intel.com, mingo@kernel.org, fenghua.yu@intel.com, tony.luck@intel.com, yu.c.chen@intel.com Reply-To: yu.c.chen@intel.com, tony.luck@intel.com, fenghua.yu@intel.com, mingo@kernel.org, xiaochen.shen@intel.com, reinette.chatre@intel.com, tglx@linutronix.de, hpa@zytor.com, linux-kernel@vger.kernel.org In-Reply-To: <1537048707-76280-7-git-send-email-fenghua.yu@intel.com> References: <1537048707-76280-7-git-send-email-fenghua.yu@intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/urgent] x86/intel_rdt: Do not allow pseudo-locking of MBA resource Git-Commit-ID: 32d736abed4febff4b6bf85d5d240ee24d254322 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: 32d736abed4febff4b6bf85d5d240ee24d254322 Gitweb: https://git.kernel.org/tip/32d736abed4febff4b6bf85d5d240ee24d254322 Author: Reinette Chatre AuthorDate: Sat, 15 Sep 2018 14:58:24 -0700 Committer: Thomas Gleixner CommitDate: Tue, 18 Sep 2018 23:38:06 +0200 x86/intel_rdt: Do not allow pseudo-locking of MBA resource A system supporting pseudo-locking may have MBA as well as CAT resources of which only the CAT resources could support cache pseudo-locking. When the schemata to be pseudo-locked is provided it should be checked that that schemata does not attempt to pseudo-lock a MBA resource. Fixes: e0bdfe8e3 ("x86/intel_rdt: Support creation/removal of pseudo-locked region") Signed-off-by: Reinette Chatre Signed-off-by: Fenghua Yu Signed-off-by: Thomas Gleixner Cc: "H Peter Anvin" Cc: "Tony Luck" Cc: "Xiaochen Shen" Cc: "Chen Yu" Link: https://lkml.kernel.org/r/1537048707-76280-7-git-send-email-fenghua.yu@intel.com --- arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c index edd5761f7336..0f53049719cd 100644 --- a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c +++ b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c @@ -195,6 +195,12 @@ static int parse_line(char *line, struct rdt_resource *r, struct rdt_domain *d; unsigned long dom_id; + if (rdtgrp->mode == RDT_MODE_PSEUDO_LOCKSETUP && + r->rid == RDT_RESOURCE_MBA) { + rdt_last_cmd_puts("Cannot pseudo-lock MBA resource\n"); + return -EINVAL; + } + next: if (!line || line[0] == '\0') return 0;