From patchwork Thu May 27 12:58:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12284141 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 97D97C47089 for ; Thu, 27 May 2021 12:59:34 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 6239D60FE6 for ; Thu, 27 May 2021 12:59:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6239D60FE6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.133218.248390 (Exim 4.92) (envelope-from ) id 1lmFbk-0007IQ-Kv; Thu, 27 May 2021 12:59:28 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 133218.248390; Thu, 27 May 2021 12:59:28 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lmFbk-0007IG-Ha; Thu, 27 May 2021 12:59:28 +0000 Received: by outflank-mailman (input) for mailman id 133218; Thu, 27 May 2021 12:59:27 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lmFbj-0006ac-5w for xen-devel@lists.xenproject.org; Thu, 27 May 2021 12:59:27 +0000 Received: from mail-pg1-x52a.google.com (unknown [2607:f8b0:4864:20::52a]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 604db2b4-a7af-4f19-9aa1-0108a4c225df; Thu, 27 May 2021 12:59:22 +0000 (UTC) Received: by mail-pg1-x52a.google.com with SMTP id 29so3618019pgu.11 for ; Thu, 27 May 2021 05:59:22 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:a93:378d:9a9e:3b70]) by smtp.gmail.com with UTF8SMTPSA id m14sm2012639pff.17.2021.05.27.05.59.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 May 2021 05:59:21 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 604db2b4-a7af-4f19-9aa1-0108a4c225df 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=v5uDNYG4BjZ/8joAD3lImi71MufKa1LW825i4nd7Nkw=; b=E61Ri/F39WkjFWJqAXjGFvQPED/h2WAUJXs5JDDaCoUA1omO3EVyPXt2Y2hwAfXcjs MTmmUwzdXmE7AXrGKnYXFwjizScT15arM61lsHXOY8uoU6WtnTGi/ZNZ6/f2x5v6f4yj nZWUxmDPBg+tGToE82wIiDUeuR5LEBQHZ4KOI= 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=v5uDNYG4BjZ/8joAD3lImi71MufKa1LW825i4nd7Nkw=; b=XmO2Q7c/kWF+M11cNkeZyydli5DBgx6+8TbJtRdsGxc241FWyI+W8APm92drREmsgY SmSwyewn4Ffda8Y0jufjxRGxHCgqQMRXE6LlwlcPRtCA+PkxVdg7kWM+eIymqBlUlLsz lT4F1QHvgbOpJ27a4tYrpCyZ11CJPudi2iXMUwO0oQIlEGEm1tR/TW8LPGyya7oTTQt8 kvg0sKUES5cygvGDumBSxUNiKfV3R7xKop9/wcRT3GBgLm02jQnyHoxStCYOZWABTiU3 euOonbH0o6py24Kx5K8gBM0Y728D/dLTOEiGjc1SLGc1F52TEEsMpP0SwTJjSZ6Z/4Tm yg/g== X-Gm-Message-State: AOAM533ELK5GQHWa6mkViBW+NP5llWnBc5T7YF18Gd2HIYQ1hMgPOaxz /3mI4ruqMeI/r6K9/pZB2njxow== X-Google-Smtp-Source: ABdhPJxENRpAFf3CkWut6vuXYNlsvVQFU1tdVBb0uZip+87V32FWXRIoYRditOw7sBaKZrr0nh2u9g== X-Received: by 2002:a05:6a00:134b:b029:2bf:2c30:ebbd with SMTP id k11-20020a056a00134bb02902bf2c30ebbdmr3639373pfu.74.1622120361576; Thu, 27 May 2021 05:59:21 -0700 (PDT) From: Claire Chang To: Rob Herring , mpe@ellerman.id.au, Joerg Roedel , Will Deacon , Frank Rowand , Konrad Rzeszutek Wilk , boris.ostrovsky@oracle.com, jgross@suse.com, Christoph Hellwig , Marek Szyprowski Cc: benh@kernel.crashing.org, paulus@samba.org, "list@263.net:IOMMU DRIVERS" , sstabellini@kernel.org, Robin Murphy , grant.likely@arm.com, xypron.glpk@gmx.de, Thierry Reding , mingo@kernel.org, bauerman@linux.ibm.com, peterz@infradead.org, Greg KH , Saravana Kannan , "Rafael J . Wysocki" , heikki.krogerus@linux.intel.com, Andy Shevchenko , Randy Dunlap , Dan Williams , Bartosz Golaszewski , linux-devicetree , lkml , linuxppc-dev@lists.ozlabs.org, xen-devel@lists.xenproject.org, Nicolas Boichat , Jim Quinlan , tfiga@chromium.org, bskeggs@redhat.com, bhelgaas@google.com, chris@chris-wilson.co.uk, tientzu@chromium.org, daniel@ffwll.ch, airlied@linux.ie, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, jani.nikula@linux.intel.com, jxgao@google.com, joonas.lahtinen@linux.intel.com, linux-pci@vger.kernel.org, maarten.lankhorst@linux.intel.com, matthew.auld@intel.com, rodrigo.vivi@intel.com, thomas.hellstrom@linux.intel.com Subject: [PATCH v8 03/15] swiotlb: Add DMA_RESTRICTED_POOL Date: Thu, 27 May 2021 20:58:33 +0800 Message-Id: <20210527125845.1852284-4-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.818.g46aad6cb9e-goog In-Reply-To: <20210527125845.1852284-1-tientzu@chromium.org> References: <20210527125845.1852284-1-tientzu@chromium.org> MIME-Version: 1.0 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