From patchwork Thu Apr 22 08:14:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12218061 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 ABB2DC433B4 for ; Thu, 22 Apr 2021 09:10:37 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 551126146E for ; Thu, 22 Apr 2021 09:10:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 551126146E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F31496EA53; Thu, 22 Apr 2021 09:10:15 +0000 (UTC) Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by gabe.freedesktop.org (Postfix) with ESMTPS id 79B8E6EA46 for ; Thu, 22 Apr 2021 08:15:53 +0000 (UTC) Received: by mail-pj1-x1029.google.com with SMTP id m6-20020a17090a8586b02901507e1acf0fso530512pjn.3 for ; Thu, 22 Apr 2021 01:15:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=k4dyB3xlmvkfx6+ggy7Uv640xgq260Lfsxi7yqvhCZI=; b=kLFGcuOQrccDqfD9J76t1/kDLyymEf5QZdonwnYtBNPLHycZjLGV1OskzqU8d8CBT2 dFZ2kyndUcgD1g6WATSmnvKXnlXdau6lSM6AakeoAvt1oeObRayZc+uNuTgzJ9Ur1iuG 1ryoegnb2fqqmY98GaQlrYL4hIv1GoXoL11Cg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=k4dyB3xlmvkfx6+ggy7Uv640xgq260Lfsxi7yqvhCZI=; b=GgSGMldbwEJe6lEmQoHwyP86e0xcFfGQYspgr5w0GFz4WeZLtHHIdSJOuc2yvBa+AM d7lZtZXgNyuE9mxDVFmwGr3lojsfqq0wmEG0o1+EgHc2GOYBMGMzU2VTIWIEJGPU//FC fTw0IfJB5xH7KDVlWhOYv2AIlZi+StepCDBWRLXBsUw7AfI1fs3xjw1wazeO7k2opoHS 0z9FV2wZ2dH6BvEu9WbBMl0kkhQBU4S91n0aJ6uoZFHfs4GjYUJwZPDO09ovxBygu7rC k3svyZkOPFSMdTnUaeQr74OgZ6rR5gOrU9XJ2UbT8ju9ng+6qRzLmG6mPL18DodyLpE9 +kzw== X-Gm-Message-State: AOAM532f834ks8T2jT7lRKQXYUJwFp32H6haYd7WZ6S2JY2vZ2kkk+b8 6W2pvHFvD/F5IRAEZPhVcYIwZA== X-Google-Smtp-Source: ABdhPJzaPOcvkpo4oh1A/JsjcQqzOO/tc1NI/mmGYHMg9yfM2pWhcv0q011OgU/0UUPri4B/30xsPg== X-Received: by 2002:a17:90b:14c4:: with SMTP id jz4mr2772455pjb.144.1619079353175; Thu, 22 Apr 2021 01:15:53 -0700 (PDT) Received: from localhost ([2401:fa00:1:10:1a8e:1bde:f79e:c302]) by smtp.gmail.com with UTF8SMTPSA id bk6sm4233324pjb.10.2021.04.22.01.15.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Apr 2021 01:15:52 -0700 (PDT) From: Claire Chang To: Joerg Roedel , Will Deacon , Frank Rowand , Konrad Rzeszutek Wilk , boris.ostrovsky@oracle.com, jgross@suse.com, Christoph Hellwig , Marek Szyprowski Subject: [PATCH v5 04/16] swiotlb: Add DMA_RESTRICTED_POOL Date: Thu, 22 Apr 2021 16:14:56 +0800 Message-Id: <20210422081508.3942748-5-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.368.gbe11c130af-goog In-Reply-To: <20210422081508.3942748-1-tientzu@chromium.org> References: <20210422081508.3942748-1-tientzu@chromium.org> MIME-Version: 1.0 X-Mailman-Approved-At: Thu, 22 Apr 2021 09:10:06 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org, mingo@kernel.org, jxgao@google.com, sstabellini@kernel.org, Saravana Kannan , xypron.glpk@gmx.de, "Rafael J . Wysocki" , Bartosz Golaszewski , bskeggs@redhat.com, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Thierry Reding , intel-gfx@lists.freedesktop.org, matthew.auld@intel.com, linux-devicetree , airlied@linux.ie, Robin Murphy , Nicolas Boichat , rodrigo.vivi@intel.com, bhelgaas@google.com, tientzu@chromium.org, Dan Williams , Andy Shevchenko , nouveau@lists.freedesktop.org, Greg KH , Randy Dunlap , lkml , tfiga@chromium.org, "list@263.net:IOMMU DRIVERS" , Jim Quinlan , linuxppc-dev@lists.ozlabs.org, bauerman@linux.ibm.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a new kconfig symbol, DMA_RESTRICTED_POOL, for restricted DMA pool. Signed-off-by: Claire Chang --- kernel/dma/Kconfig | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 77b405508743..3e961dc39634 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -80,6 +80,20 @@ config SWIOTLB bool select NEED_DMA_MAP_STATE +config DMA_RESTRICTED_POOL + bool "DMA Restricted Pool" + depends on OF && OF_RESERVED_MEM + select SWIOTLB + help + This enables support for restricted DMA pools which provide a level of + DMA memory protection on systems with limited hardware protection + capabilities, such as those lacking an IOMMU. + + For more information see + + and . + If unsure, say "n". + # # Should be selected if we can mmap non-coherent mappings to userspace. # The only thing that is really required is a way to set an uncached bit