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=-3.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 BA330C3A59F for ; Thu, 29 Aug 2019 11:14:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8D6F320674 for ; Thu, 29 Aug 2019 11:14:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="oqZSmeLw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727122AbfH2LOL (ORCPT ); Thu, 29 Aug 2019 07:14:11 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:35526 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726982AbfH2LOL (ORCPT ); Thu, 29 Aug 2019 07:14:11 -0400 Received: by mail-wm1-f68.google.com with SMTP id l2so3421266wmg.0; Thu, 29 Aug 2019 04:14:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=JD+FPst1Rc2Zts2/SszFlnm8yp7vNf5nv1OwzcG2Ea4=; b=oqZSmeLw/EC3Wd0txJnCJRoJzOmmCY56LdWnG2oKlSLUljtbZSUQpyV71svWYX9r4a nHrLUveNwTmd16rB8M0PNaaiHRW9/d9Jzb+ru281rX04x3PB0KLs6Bxo9dZhgg3PBQFW umAZcpfdKECX/Caf4nntQFZS79CEf3J/8mswG+70D4oIMuQx8+TODriRJQp7/uBp+oU5 YIObXT9Hj6in32E9rNwbWdIBzc4LDYhJhYYXS/l+iGNtrtqtMpUu2iJVEpFcGHwVmcvO WGWAc/knxRIl1thWtrjKuOJ1V9Y4XxiGwiQTYNaoVFkMGCE0Z/PiqW4tcKI0ZlzxpjIS qzUQ== 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:mime-version :content-transfer-encoding; bh=JD+FPst1Rc2Zts2/SszFlnm8yp7vNf5nv1OwzcG2Ea4=; b=LAyFiVvM91FV3zjC0zzQBME4wyCCJJF98/gNvip+epxFAAO9DET/8xCOKZOJN0XGfI ePtTfJvdTSml+ia+Zh/8UbIYJK8R5EVoirukVzVgiERunahgVlhaVATyO+vwX+CZBna4 X9i9O4Iv1MMAUOhc28wH81oSoEfkE60/fWdx5rojTMhvCnfMwxFx3wUIvU2sMml2uWp+ YsoD0w5H3R8hwfUU0/vWfXAwIuzKglivFeLoVe+B2Vn9xhDYcLKzVvH/d43dTe6Im0gZ ha7pqNWC8HX+91adV9eQprjucdhVK9YV6LcYTKwN+t0p94zgEjYGQ2hlmFlYON6HFx+d 1llQ== X-Gm-Message-State: APjAAAWroUR++SNsXsLh7XbKgcfDuWQGMKB7PoIpW9LWK7zCX8AY7mAO /zqtH//WpnTVZU6hjswEDuo= X-Google-Smtp-Source: APXvYqzcmuDvPpuvAAO8pn2NqELxI3Y0KBVVxn316XZ2m3inkhdiVtyJlblr8PnZhlxEiSikUNWvPg== X-Received: by 2002:a1c:ca09:: with SMTP id a9mr10586744wmg.43.1567077249051; Thu, 29 Aug 2019 04:14:09 -0700 (PDT) Received: from localhost (pD9E51890.dip0.t-ipconnect.de. [217.229.24.144]) by smtp.gmail.com with ESMTPSA id l62sm3469749wml.13.2019.08.29.04.14.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Aug 2019 04:14:08 -0700 (PDT) From: Thierry Reding To: Joerg Roedel Cc: Rob Herring , Frank Rowand , Will Deacon , Robin Murphy , iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/2] iommu: Support reserved-memory regions Date: Thu, 29 Aug 2019 13:14:05 +0200 Message-Id: <20190829111407.17191-1-thierry.reding@gmail.com> X-Mailer: git-send-email 2.22.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thierry Reding These two patches implement support for retrieving a list of reserved regions for a device from its device tree node. These regions are described by the reserved-memory bindings: Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt These reserved memory regions will be used to establish 1:1 mappings. One case where this is useful is when the Linux kernel wants to take over the display controller configuration from a bootloader. In order to ensure that the display controller can keep scanning out from the framebuffer allocated by the bootloader without faulting after the IOMMU has been enabled, a 1:1 mapping needs to be established. Thierry Thierry Reding (2): iommu: Implement of_iommu_get_resv_regions() iommu: dma: Use of_iommu_get_resv_regions() drivers/iommu/dma-iommu.c | 3 +++ drivers/iommu/of_iommu.c | 39 +++++++++++++++++++++++++++++++++++++++ include/linux/of_iommu.h | 8 ++++++++ 3 files changed, 50 insertions(+) -- 2.22.0