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 D1E96C48BE6 for ; Sat, 12 Jun 2021 02:18:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA66D6100B for ; Sat, 12 Jun 2021 02:18:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230212AbhFLCQs (ORCPT ); Fri, 11 Jun 2021 22:16:48 -0400 Received: from mga03.intel.com ([134.134.136.65]:55622 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229584AbhFLCQr (ORCPT ); Fri, 11 Jun 2021 22:16:47 -0400 IronPort-SDR: 1+K/mIiIqc8HcvBcGYMuDmuZMZysPDi4hSgJmGT8ntYIWZbhbdkzBV4KlruYFJKqH2wmSfp+b3 4vCiEZCgWFQQ== X-IronPort-AV: E=McAfee;i="6200,9189,10012"; a="205666199" X-IronPort-AV: E=Sophos;i="5.83,268,1616482800"; d="scan'208";a="205666199" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2021 19:14:48 -0700 IronPort-SDR: zFoT6/2u2LKVQcB4dM1HXOmKvoCHyY0If2ZNmOSdEuMOQYuur6hisdLmnKeigQAH7F1iSht3LE vlMF1SL7U7MA== X-IronPort-AV: E=Sophos;i="5.83,268,1616482800"; d="scan'208";a="483472737" 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 19:14:45 -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 Subject: Re: [PATCH v12 3/5] iommu/vt-d: Add support for IOMMU default DMA mode build options 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 Message-ID: Date: Sat, 12 Jun 2021 10:14:43 +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: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2021/6/11 20:20, John Garry wrote: > diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig > index 2a71347611d4..4467353f981b 100644 > --- a/drivers/iommu/Kconfig > +++ b/drivers/iommu/Kconfig > @@ -94,6 +94,7 @@ choice > prompt "IOMMU default DMA mode" > depends on IOMMU_DMA > > + default IOMMU_DEFAULT_LAZY if INTEL_IOMMU > default IOMMU_DEFAULT_STRICT If two default values are different. Which one will be overridden? Best regards, baolu