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=-19.3 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 B1CBAC43381 for ; Tue, 9 Feb 2021 06:26:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8931560230 for ; Tue, 9 Feb 2021 06:26:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230264AbhBIG0H (ORCPT ); Tue, 9 Feb 2021 01:26:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230088AbhBIGXS (ORCPT ); Tue, 9 Feb 2021 01:23:18 -0500 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8FE2C0617AB for ; Mon, 8 Feb 2021 22:22:19 -0800 (PST) Received: by mail-pl1-x62f.google.com with SMTP id g3so9183457plp.2 for ; Mon, 08 Feb 2021 22:22:19 -0800 (PST) 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=9SQyVkSYwcHNPQBFHoCQtFFFjCENqy21v8WbruxTyIQ=; b=S8b7bks4s14Aq0h3NWBRKYyM5rNroqOh0mjkOQqRPPLHlWF1b/82tP2JW6Ak+XahaS vuqFZkcLranydMu7pllFHxd5nuNgxoGZIBPnWrP05Of2B7XaG8dtqQLOaoHbIZQ1OzXK 3qWvUM55PHjPtT5jCfFBuHsTloYPqv037Cmok= 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=9SQyVkSYwcHNPQBFHoCQtFFFjCENqy21v8WbruxTyIQ=; b=kvVXtOQVuWN2DARWY8F4lpSuZe5fcSdAPE1qES1kR41gldCuJtVQi+chQpyVxPmWJU Sn3aGGwej0ZbptMa4ld9DFlokY3pIK0zLmRcB07xGElWpUbbC2QGq5zPPwoJDuufAbbL Suo7CWv8szTJ0mUyj6+eo7FlD01wVl8j7HHczcRkGgnVTU2VtCHdFt94Ud+0Cq0DPJZn 5faa2Bg67bQKhxeDSVVFeWzWEW7/PsIFsR/8DtmHtTaA+eInmYTg1NNZAJHZGRGl5UfS INPeOxilMFL0TQh/ZZkMzlsVXOvkAl6a1HA5TNIhB8Vt0VASmZsctypOa/EZuHiL1ysY ariA== X-Gm-Message-State: AOAM533tgp19W9m0uMoY9my9wYfAV0y+65fw3IY1g1Ii3xz5T7fR7Ymp kODzPnCS2IVt1v6rSsgs7J+ikw== X-Google-Smtp-Source: ABdhPJxcpi2bQzo5Ag59ySIm3BqsShiYpJbthB3TKnbwDYfpDCilPQMTJU6vCjKSHchn3Ia3PqrJPA== X-Received: by 2002:a17:90a:654a:: with SMTP id f10mr2534268pjs.202.1612851739435; Mon, 08 Feb 2021 22:22:19 -0800 (PST) Received: from localhost ([2401:fa00:1:10:a106:46e1:a999:81df]) by smtp.gmail.com with UTF8SMTPSA id g17sm21205826pfq.135.2021.02.08.22.22.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 08 Feb 2021 22:22:18 -0800 (PST) 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 , Claire Chang Subject: [PATCH v4 05/14] swiotlb: Add DMA_RESTRICTED_POOL Date: Tue, 9 Feb 2021 14:21:22 +0800 Message-Id: <20210209062131.2300005-6-tientzu@chromium.org> X-Mailer: git-send-email 2.30.0.478.g8a0d178c01-goog In-Reply-To: <20210209062131.2300005-1-tientzu@chromium.org> References: <20210209062131.2300005-1-tientzu@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 479fc145acfc..97ff9f8dd3c8 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -83,6 +83,20 @@ 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 -- 2.30.0.478.g8a0d178c01-goog