From patchwork Wed Jul 28 15:58:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 12406305 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=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,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 611B8C4338F for ; Wed, 28 Jul 2021 16:16:23 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2E04E6018A for ; Wed, 28 Jul 2021 16:16:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2E04E6018A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=l9knjNEjpoIgWQ5xCiueLu5Na//Otn0gxFN2fnt67O8=; b=M63gzlDZU05RUh Enrk40UqtRpFWPGF0fB9auC8b+/IKKEEElQSqB1PnNrGB0aaMfFU9QstkZRiNlZRDhw2/2wZWKnn6 Jdutgt2wX1CuCqpzjAujmAzYLGsmV1+ZAItt9DN7pMKR/Z8aT6MNWpaUlWjAn02yLheE4K+NiqfQl Uw9ua1HVKvIYlkhptxbSRnhc2/rtjpMrbIWY9NU6KyhsydM4h2I2mVumnKcTy4aS5tXCKoXZff00l Ctn10idD/+Fmdt5XFaOlArZ/5h1KZ2jfO4iNxlss4d1tHuNfl0BaQGTcqSn8z5J7Vhk8oaoOvUg+v WBQswwJyxBmtug/hkQGw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m8mC0-001XBZ-9h; Wed, 28 Jul 2021 16:14:00 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m8lyH-001PbY-QO for linux-arm-kernel@lists.infradead.org; Wed, 28 Jul 2021 15:59:51 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DC1F41424; Wed, 28 Jul 2021 08:59:48 -0700 (PDT) Received: from 010265703453.arm.com (unknown [10.57.36.146]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6669C3F70D; Wed, 28 Jul 2021 08:59:47 -0700 (PDT) From: Robin Murphy To: joro@8bytes.org, will@kernel.org Cc: iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, suravee.suthikulpanit@amd.com, baolu.lu@linux.intel.com, john.garry@huawei.com, dianders@chromium.org Subject: [PATCH v2 24/24] iommu: Only log strictness for DMA domains Date: Wed, 28 Jul 2021 16:58:45 +0100 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210728_085949_956842_C5402F18 X-CRM114-Status: UNSURE ( 9.99 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org When passthrough is enabled, the default strictness policy becomes irrelevant, since any subsequent runtime override to a DMA domain type now embodies an explicit choice of strictness as well. Save on noise by only logging the default policy when it is meaningfully in effect. Signed-off-by: Robin Murphy Reviewed-by: John Garry Reviewed-by: Lu Baolu --- drivers/iommu/iommu.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index be399d630953..87d7b299436e 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -144,10 +144,11 @@ static int __init iommu_subsys_init(void) (iommu_cmd_line & IOMMU_CMD_LINE_DMA_API) ? "(set via kernel command line)" : ""); - pr_info("DMA domain TLB invalidation policy: %s mode %s\n", - iommu_dma_strict ? "strict" : "lazy", - (iommu_cmd_line & IOMMU_CMD_LINE_STRICT) ? - "(set via kernel command line)" : ""); + if (!iommu_default_passthrough()) + pr_info("DMA domain TLB invalidation policy: %s mode %s\n", + iommu_dma_strict ? "strict" : "lazy", + (iommu_cmd_line & IOMMU_CMD_LINE_STRICT) ? + "(set via kernel command line)" : ""); return 0; }