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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 7E521ECE562 for ; Sat, 15 Sep 2018 22:02:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4395F20671 for ; Sat, 15 Sep 2018 22:02:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4395F20671 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.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 S1728313AbeIPDWj (ORCPT ); Sat, 15 Sep 2018 23:22:39 -0400 Received: from mga17.intel.com ([192.55.52.151]:35528 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728023AbeIPDWA (ORCPT ); Sat, 15 Sep 2018 23:22:00 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Sep 2018 15:01:29 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.53,379,1531810800"; d="scan'208";a="70289164" Received: from romley-ivt3.sc.intel.com ([172.25.110.60]) by fmsmga007.fm.intel.com with ESMTP; 15 Sep 2018 15:01:29 -0700 From: Fenghua Yu To: "Thomas Gleixner" , "Ingo Molnar" , "H Peter Anvin" , "Tony Luck" Cc: "Chatre, Reinette" , "Xiaochen Shen" , "Chen Yu" , "linux-kernel" , "x86" , "Fenghua Yu" Subject: [PATCH V2 6/9] x86/intel_rdt: Do not allow pseudo-locking of MBA resource Date: Sat, 15 Sep 2018 14:58:24 -0700 Message-Id: <1537048707-76280-7-git-send-email-fenghua.yu@intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1537048707-76280-1-git-send-email-fenghua.yu@intel.com> References: <1537048707-76280-1-git-send-email-fenghua.yu@intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Reinette Chatre 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 --- 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; -- 2.19.0