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=-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 19E71C4707F for ; Thu, 27 May 2021 12:59:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF82161355 for ; Thu, 27 May 2021 12:59:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235986AbhE0NA5 (ORCPT ); Thu, 27 May 2021 09:00:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235983AbhE0NA4 (ORCPT ); Thu, 27 May 2021 09:00:56 -0400 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06B4EC06138C for ; Thu, 27 May 2021 05:59:22 -0700 (PDT) Received: by mail-pg1-x534.google.com with SMTP id e22so3617612pgv.10 for ; Thu, 27 May 2021 05:59:22 -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=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=SZydy9fqIOI+mDD8G+2Hzu7Wn7TQlsAod6ip+76iTyZ9n8VltrgergYaI8SklKuV4V X1TXxaTmYNi97gFQC1Aia/zzfXO9wQVixXkb2AVO7GDI+q9Qu6JgfA9c1v41941jb9RW cmDFEl93Eao2z8ioBbINBC7bEA47hiGdXkvfqpin76BfFUKaZmh8HzcmHB0/kxvNyplB Cv49YxIAWI2wLMqn3Nx6bD5zt6t0gvKVjAhPlHm8Aar7W6a90KQniwEfom+7kU9j25vp T/YYcSttZdW2XfTGZDis+1OAF6Dk8hQcY2417BTDaWajy0lg6P02yU5UsTMkY6rbunMM V2Vw== X-Gm-Message-State: AOAM532DlJNAYQyEK+UYvtp/Q63hTU0tww8Vy1KFVr0cuMMDgOwgFrbE r+ZwbNmfXabYEK4PYiYKEV/OBA== 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) 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) 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 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org 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 -- 2.31.1.818.g46aad6cb9e-goog