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=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 2FE46C48BE8 for ; Sat, 12 Jun 2021 02:22:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EEA70610C7 for ; Sat, 12 Jun 2021 02:22:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230267AbhFLCYO (ORCPT ); Fri, 11 Jun 2021 22:24:14 -0400 Received: from mga12.intel.com ([192.55.52.136]:55060 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230236AbhFLCYL (ORCPT ); Fri, 11 Jun 2021 22:24:11 -0400 IronPort-SDR: lZdzqZRnnYGaPl7b8mVai/rhsFNORbOptwk9COSTnozOExGj9Es4ImRa3nI4sKQ24wpL3GwGpI EXEbJS866Ydw== X-IronPort-AV: E=McAfee;i="6200,9189,10012"; a="185332880" X-IronPort-AV: E=Sophos;i="5.83,268,1616482800"; d="scan'208";a="185332880" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2021 19:22:10 -0700 IronPort-SDR: ZysiFsrZ4pWagwIqIBTg+k5Dg7ZjYlOieEOa6PckGcJsI4HMKNINe3ACibzjyuLSMgliM25Mcf JpQJPXoZnuVQ== X-IronPort-AV: E=Sophos;i="5.83,268,1616482800"; d="scan'208";a="483473788" Received: from blu2-mobl3.ccr.corp.intel.com (HELO [10.238.4.20]) ([10.238.4.20]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2021 19:22:07 -0700 Cc: baolu.lu@linux.intel.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, linuxarm@huawei.com, thunder.leizhen@huawei.com, chenxiang66@hisilicon.com To: John Garry , joro@8bytes.org, will@kernel.org, dwmw2@infradead.org, robin.murphy@arm.com References: <1623414043-40745-1-git-send-email-john.garry@huawei.com> <1623414043-40745-4-git-send-email-john.garry@huawei.com> From: Lu Baolu Subject: Re: [PATCH v12 3/5] iommu/vt-d: Add support for IOMMU default DMA mode build options Message-ID: <4f2cec34-bad9-e1bf-85c1-04d1a0c1aecf@linux.intel.com> Date: Sat, 12 Jun 2021 10:22:05 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <1623414043-40745-4-git-send-email-john.garry@huawei.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2021/6/11 20:20, John Garry wrote: > @@ -453,8 +452,7 @@ static int __init intel_iommu_setup(char *str) > pr_warn("intel_iommu=forcedac deprecated; use iommu.forcedac instead\n"); > iommu_dma_forcedac = true; > } else if (!strncmp(str, "strict", 6)) { > - pr_info("Disable batched IOTLB flush\n"); > - intel_iommu_strict = 1; > + iommu_set_dma_strict(true); I would like to deprecate this command line and ask users to use iommu.strict instead. --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -436,7 +436,7 @@ static int __init intel_iommu_setup(char *str) pr_warn("intel_iommu=forcedac deprecated; use iommu.forcedac instead\n"); iommu_dma_forcedac = true; } else if (!strncmp(str, "strict", 6)) { - pr_info("Disable batched IOTLB flush\n"); + pr_warn("intel_iommu=strict deprecated; use iommu.strict instead\n"); intel_iommu_strict = 1; Also update Documentation/admin-guide/kernel-parameters.txt accordingly. Best regards, baolu