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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,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 04206C43460 for ; Thu, 22 Apr 2021 08:15:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C86B16144A for ; Thu, 22 Apr 2021 08:15:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235217AbhDVIPz (ORCPT ); Thu, 22 Apr 2021 04:15:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230365AbhDVIPx (ORCPT ); Thu, 22 Apr 2021 04:15:53 -0400 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CA03C06174A for ; Thu, 22 Apr 2021 01:15:19 -0700 (PDT) Received: by mail-pj1-x102d.google.com with SMTP id f6-20020a17090a6546b029015088cf4a1eso530200pjs.2 for ; Thu, 22 Apr 2021 01:15:19 -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:mime-version :content-transfer-encoding; bh=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=AMMWTSQCSdwHsUUdJCOC7YgUNrGXxRc8ufe8ShxXHlWgfWfBk0oS2HBubv7AQuSAMq M0urTLFpK7JN5/zRDUB5Fe/pClBUqpuo+IAb+avdRaxLPwR3C9WYDtIQPHvIq7nNv2DT 9Un/y51JxY/e6QYvwfJXjQ/aVxL0I13goxqlM= 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=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=s9ZH6RPEs1LYQcR5MoAInSdgy24S6H3ynjXbrrsN3wiXT8EK6S9tFWrHff7li+vUyn TMIPEuM/ww9yO7702/BYF60iscDf5XwfKYvomV91XEIvUA0cPy73rWbf6aeBL6Jyk+6b qT+ieqZFVuClvi3aTENLJL7wVuBaFrKuxSdWn9MnMhsOwjq1RFFHNbxU+oT1fCLbp/jL Qy8dYyb9eeB8Nxc3eW8KzrcNCDUq5HGEyWAY+GwP+tYIEoKLXjFzs99uCt0iiyyblPNl gsdkkdJKaIIc4vbA+TucylRH2MoSppeLPNiTiQK/9a06tpjZLyyzMOkkG9h+n3wRAWTI 8dTQ== X-Gm-Message-State: AOAM532yDZDL+9nXku4Hg9Doa/NZyV9I3cbtixM//1u7a++uTZCTvwAj nO+KjGpAmf2v+u3IOwaLlPfSvA== X-Google-Smtp-Source: ABdhPJyk2JPTp3iko6u7v5EX3M6TzCT5gzjwwnFh5uBqfgtgyUVxzY91nyUWyB+4tQ6Gme84DA/b2g== X-Received: by 2002:a17:902:edd5:b029:e9:7477:5f0a with SMTP id q21-20020a170902edd5b02900e974775f0amr2141960plk.81.1619079318644; Thu, 22 Apr 2021 01:15:18 -0700 (PDT) Received: from localhost ([2401:fa00:1:10:1a8e:1bde:f79e:c302]) by smtp.gmail.com with UTF8SMTPSA id r1sm1538054pjo.26.2021.04.22.01.15.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Apr 2021 01:15:18 -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 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, nouveau@lists.freedesktop.org, rodrigo.vivi@intel.com, thomas.hellstrom@linux.intel.com Subject: [PATCH v5 00/16] Restricted DMA Date: Thu, 22 Apr 2021 16:14:52 +0800 Message-Id: <20210422081508.3942748-1-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.368.gbe11c130af-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series implements mitigations for lack of DMA access control on systems without an IOMMU, which could result in the DMA accessing the system memory at unexpected times and/or unexpected addresses, possibly leading to data leakage or corruption. For example, we plan to use the PCI-e bus for Wi-Fi and that PCI-e bus is not behind an IOMMU. As PCI-e, by design, gives the device full access to system memory, a vulnerability in the Wi-Fi firmware could easily escalate to a full system exploit (remote wifi exploits: [1a], [1b] that shows a full chain of exploits; [2], [3]). To mitigate the security concerns, we introduce restricted DMA. Restricted DMA utilizes the existing swiotlb to bounce streaming DMA in and out of a specially allocated region and does memory allocation from the same region. The feature on its own provides a basic level of protection against the DMA overwriting buffer contents at unexpected times. However, to protect against general data leakage and system memory corruption, the system needs to provide a way to restrict the DMA to a predefined memory region (this is usually done at firmware level, e.g. MPU in ATF on some ARM platforms [4]). [1a] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_4.html [1b] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_11.html [2] https://blade.tencent.com/en/advisories/qualpwn/ [3] https://www.bleepingcomputer.com/news/security/vulnerabilities-found-in-highly-popular-firmware-for-wifi-chips/ [4] https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/mediatek/mt8183/drivers/emi_mpu/emi_mpu.c#L132 v5: Rebase on latest linux-next v4: - Fix spinlock bad magic - Use rmem->name for debugfs entry - Address the comments in v3 v3: Using only one reserved memory region for both streaming DMA and memory allocation. https://lore.kernel.org/patchwork/cover/1360992/ v2: Building on top of swiotlb. https://lore.kernel.org/patchwork/cover/1280705/ v1: Using dma_map_ops. https://lore.kernel.org/patchwork/cover/1271660/ Claire Chang (16): swiotlb: Fix the type of index swiotlb: Refactor swiotlb init functions swiotlb: Refactor swiotlb_create_debugfs swiotlb: Add DMA_RESTRICTED_POOL swiotlb: Add restricted DMA pool initialization swiotlb: Add a new get_io_tlb_mem getter swiotlb: Update is_swiotlb_buffer to add a struct device argument swiotlb: Update is_swiotlb_active to add a struct device argument swiotlb: Bounce data from/to restricted DMA pool if available swiotlb: Move alloc_size to find_slots swiotlb: Refactor swiotlb_tbl_unmap_single dma-direct: Add a new wrapper __dma_direct_free_pages() swiotlb: Add restricted DMA alloc/free support. dma-direct: Allocate memory from restricted DMA pool if available dt-bindings: of: Add restricted DMA pool of: Add plumbing for restricted DMA pool .../reserved-memory/reserved-memory.txt | 24 ++ drivers/gpu/drm/i915/gem/i915_gem_internal.c | 2 +- drivers/gpu/drm/nouveau/nouveau_ttm.c | 2 +- drivers/iommu/dma-iommu.c | 12 +- drivers/of/address.c | 25 ++ drivers/of/device.c | 3 + drivers/of/of_private.h | 5 + drivers/pci/xen-pcifront.c | 2 +- drivers/xen/swiotlb-xen.c | 2 +- include/linux/device.h | 4 + include/linux/swiotlb.h | 41 ++- kernel/dma/Kconfig | 14 + kernel/dma/direct.c | 57 +++-- kernel/dma/direct.h | 9 +- kernel/dma/swiotlb.c | 242 +++++++++++++----- 15 files changed, 347 insertions(+), 97 deletions(-) -- 2.31.1.368.gbe11c130af-goog 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,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 C1A7AC43461 for ; Thu, 22 Apr 2021 08:15:56 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 BA8696145C for ; Thu, 22 Apr 2021 08:15:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA8696145C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FQqxQ1nH9z30FC for ; Thu, 22 Apr 2021 18:15:54 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.a=rsa-sha256 header.s=google header.b=AMMWTSQC; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=chromium.org (client-ip=2607:f8b0:4864:20::632; helo=mail-pl1-x632.google.com; envelope-from=tientzu@chromium.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.a=rsa-sha256 header.s=google header.b=AMMWTSQC; dkim-atps=neutral Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FQqws62rKz2xZQ for ; Thu, 22 Apr 2021 18:15:22 +1000 (AEST) Received: by mail-pl1-x632.google.com with SMTP id g16so6270838plq.3 for ; Thu, 22 Apr 2021 01:15:22 -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:mime-version :content-transfer-encoding; bh=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=AMMWTSQCSdwHsUUdJCOC7YgUNrGXxRc8ufe8ShxXHlWgfWfBk0oS2HBubv7AQuSAMq M0urTLFpK7JN5/zRDUB5Fe/pClBUqpuo+IAb+avdRaxLPwR3C9WYDtIQPHvIq7nNv2DT 9Un/y51JxY/e6QYvwfJXjQ/aVxL0I13goxqlM= 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=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=MQd+zqGe+5gXaats/x4l9N2hYzi0uA/998jSwoVLHOqYUQ/0v8Gdyw4KgD51W2nV6N RMGJ2SdP4ueNbnYE9sWlix8hA9TbpU/rOgKaKU2s6i4dMEpqd75BJlmSbwy8PXFCFulf 54Nn+f5grQ6uGcUw3Tf9z+28SOlfAVKiaQFPJs2u/dysw58tZ/nk8e/o6gs1SRoWuBgl fXg6UmdwWcnP+sAOhT9Ddhs4ECTBfqXEkihPdK5IeAss8QymR/vZXLFh8L5nzUp0MTNX 5gNsihJOOu+rfTppDCEq/DMtj7JcZI5KJN7tLqtXeMzztf5z3jIKQuAf7Dzks1RYKMGb 6Bzw== X-Gm-Message-State: AOAM5333oACFbIVRk4pZmiBQisf5rqrwX3xcL9Nr9ogLjiVJaj4MObjB oJ75rp5b8A9/t6SF1U0Wy6zNLw== X-Google-Smtp-Source: ABdhPJyk2JPTp3iko6u7v5EX3M6TzCT5gzjwwnFh5uBqfgtgyUVxzY91nyUWyB+4tQ6Gme84DA/b2g== X-Received: by 2002:a17:902:edd5:b029:e9:7477:5f0a with SMTP id q21-20020a170902edd5b02900e974775f0amr2141960plk.81.1619079318644; Thu, 22 Apr 2021 01:15:18 -0700 (PDT) Received: from localhost ([2401:fa00:1:10:1a8e:1bde:f79e:c302]) by smtp.gmail.com with UTF8SMTPSA id r1sm1538054pjo.26.2021.04.22.01.15.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Apr 2021 01:15:18 -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 00/16] Restricted DMA Date: Thu, 22 Apr 2021 16:14:52 +0800 Message-Id: <20210422081508.3942748-1-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.368.gbe11c130af-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, joonas.lahtinen@linux.intel.com, 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 , daniel@ffwll.ch, airlied@linux.ie, maarten.lankhorst@linux.intel.com, linuxppc-dev@lists.ozlabs.org, jani.nikula@linux.intel.com, 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 , Robin Murphy , bauerman@linux.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This series implements mitigations for lack of DMA access control on systems without an IOMMU, which could result in the DMA accessing the system memory at unexpected times and/or unexpected addresses, possibly leading to data leakage or corruption. For example, we plan to use the PCI-e bus for Wi-Fi and that PCI-e bus is not behind an IOMMU. As PCI-e, by design, gives the device full access to system memory, a vulnerability in the Wi-Fi firmware could easily escalate to a full system exploit (remote wifi exploits: [1a], [1b] that shows a full chain of exploits; [2], [3]). To mitigate the security concerns, we introduce restricted DMA. Restricted DMA utilizes the existing swiotlb to bounce streaming DMA in and out of a specially allocated region and does memory allocation from the same region. The feature on its own provides a basic level of protection against the DMA overwriting buffer contents at unexpected times. However, to protect against general data leakage and system memory corruption, the system needs to provide a way to restrict the DMA to a predefined memory region (this is usually done at firmware level, e.g. MPU in ATF on some ARM platforms [4]). [1a] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_4.html [1b] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_11.html [2] https://blade.tencent.com/en/advisories/qualpwn/ [3] https://www.bleepingcomputer.com/news/security/vulnerabilities-found-in-highly-popular-firmware-for-wifi-chips/ [4] https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/mediatek/mt8183/drivers/emi_mpu/emi_mpu.c#L132 v5: Rebase on latest linux-next v4: - Fix spinlock bad magic - Use rmem->name for debugfs entry - Address the comments in v3 v3: Using only one reserved memory region for both streaming DMA and memory allocation. https://lore.kernel.org/patchwork/cover/1360992/ v2: Building on top of swiotlb. https://lore.kernel.org/patchwork/cover/1280705/ v1: Using dma_map_ops. https://lore.kernel.org/patchwork/cover/1271660/ Claire Chang (16): swiotlb: Fix the type of index swiotlb: Refactor swiotlb init functions swiotlb: Refactor swiotlb_create_debugfs swiotlb: Add DMA_RESTRICTED_POOL swiotlb: Add restricted DMA pool initialization swiotlb: Add a new get_io_tlb_mem getter swiotlb: Update is_swiotlb_buffer to add a struct device argument swiotlb: Update is_swiotlb_active to add a struct device argument swiotlb: Bounce data from/to restricted DMA pool if available swiotlb: Move alloc_size to find_slots swiotlb: Refactor swiotlb_tbl_unmap_single dma-direct: Add a new wrapper __dma_direct_free_pages() swiotlb: Add restricted DMA alloc/free support. dma-direct: Allocate memory from restricted DMA pool if available dt-bindings: of: Add restricted DMA pool of: Add plumbing for restricted DMA pool .../reserved-memory/reserved-memory.txt | 24 ++ drivers/gpu/drm/i915/gem/i915_gem_internal.c | 2 +- drivers/gpu/drm/nouveau/nouveau_ttm.c | 2 +- drivers/iommu/dma-iommu.c | 12 +- drivers/of/address.c | 25 ++ drivers/of/device.c | 3 + drivers/of/of_private.h | 5 + drivers/pci/xen-pcifront.c | 2 +- drivers/xen/swiotlb-xen.c | 2 +- include/linux/device.h | 4 + include/linux/swiotlb.h | 41 ++- kernel/dma/Kconfig | 14 + kernel/dma/direct.c | 57 +++-- kernel/dma/direct.h | 9 +- kernel/dma/swiotlb.c | 242 +++++++++++++----- 15 files changed, 347 insertions(+), 97 deletions(-) -- 2.31.1.368.gbe11c130af-goog 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,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 B0AF9C43460 for ; Thu, 22 Apr 2021 17:20:28 +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 AEFFF613E1 for ; Thu, 22 Apr 2021 17:20:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AEFFF613E1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=nouveau-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6ACA56E55E; Thu, 22 Apr 2021 17:20:19 +0000 (UTC) Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0E7EA6EA3D for ; Thu, 22 Apr 2021 08:15:19 +0000 (UTC) Received: by mail-pl1-x62d.google.com with SMTP id y1so7480943plg.11 for ; Thu, 22 Apr 2021 01:15:19 -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:mime-version :content-transfer-encoding; bh=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=AMMWTSQCSdwHsUUdJCOC7YgUNrGXxRc8ufe8ShxXHlWgfWfBk0oS2HBubv7AQuSAMq M0urTLFpK7JN5/zRDUB5Fe/pClBUqpuo+IAb+avdRaxLPwR3C9WYDtIQPHvIq7nNv2DT 9Un/y51JxY/e6QYvwfJXjQ/aVxL0I13goxqlM= 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=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=oHOto7C6f3TPlc0+biqGYCq9Tlh1oaYramvYhLNWBE0yPMvWxzszy0SED+XcDYT1xj O+n8pqO18krN4mE/eBtDRGwwSF9Xz0vaKVuphILoZhBcn6ZBxXgdxaQoxxc8JXDTm+Yt 5cThqb4qzWVKjuOR/vSlc3G/dMS+gyTcg3PicIfXrILXPCJcbqKgmDr50+vACw4u376H wSd4EEOSTmI4cfsbM8JCBqF9qdLCVVls9H1/Ffxs2OcWTubX4h0ckcZ8L5pl5dykp2t4 +hlO4moqJHokHRr5Xvgb4HntZ35E0V1KQ9XNxNMDxtX0hP1mP5LB88sH6QmA50Ic26R1 igGQ== X-Gm-Message-State: AOAM531saGgb8OkuCu9AYd7Dh4r+W0KB9NcfsN0AIPdV9ehZaRE1uQUb H7YizeEP6glOkQ8P0GTj8Ifw+g== X-Google-Smtp-Source: ABdhPJyk2JPTp3iko6u7v5EX3M6TzCT5gzjwwnFh5uBqfgtgyUVxzY91nyUWyB+4tQ6Gme84DA/b2g== X-Received: by 2002:a17:902:edd5:b029:e9:7477:5f0a with SMTP id q21-20020a170902edd5b02900e974775f0amr2141960plk.81.1619079318644; Thu, 22 Apr 2021 01:15:18 -0700 (PDT) Received: from localhost ([2401:fa00:1:10:1a8e:1bde:f79e:c302]) by smtp.gmail.com with UTF8SMTPSA id r1sm1538054pjo.26.2021.04.22.01.15.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Apr 2021 01:15:18 -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 Date: Thu, 22 Apr 2021 16:14:52 +0800 Message-Id: <20210422081508.3942748-1-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.368.gbe11c130af-goog MIME-Version: 1.0 X-Mailman-Approved-At: Thu, 22 Apr 2021 17:20:11 +0000 Subject: [Nouveau] [PATCH v5 00/16] Restricted DMA X-BeenThere: nouveau@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Nouveau development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, benh@kernel.crashing.org, joonas.lahtinen@linux.intel.com, 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 , daniel@ffwll.ch, airlied@linux.ie, maarten.lankhorst@linux.intel.com, Robin Murphy , jani.nikula@linux.intel.com, 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: nouveau-bounces@lists.freedesktop.org Sender: "Nouveau" This series implements mitigations for lack of DMA access control on systems without an IOMMU, which could result in the DMA accessing the system memory at unexpected times and/or unexpected addresses, possibly leading to data leakage or corruption. For example, we plan to use the PCI-e bus for Wi-Fi and that PCI-e bus is not behind an IOMMU. As PCI-e, by design, gives the device full access to system memory, a vulnerability in the Wi-Fi firmware could easily escalate to a full system exploit (remote wifi exploits: [1a], [1b] that shows a full chain of exploits; [2], [3]). To mitigate the security concerns, we introduce restricted DMA. Restricted DMA utilizes the existing swiotlb to bounce streaming DMA in and out of a specially allocated region and does memory allocation from the same region. The feature on its own provides a basic level of protection against the DMA overwriting buffer contents at unexpected times. However, to protect against general data leakage and system memory corruption, the system needs to provide a way to restrict the DMA to a predefined memory region (this is usually done at firmware level, e.g. MPU in ATF on some ARM platforms [4]). [1a] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_4.html [1b] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_11.html [2] https://blade.tencent.com/en/advisories/qualpwn/ [3] https://www.bleepingcomputer.com/news/security/vulnerabilities-found-in-highly-popular-firmware-for-wifi-chips/ [4] https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/mediatek/mt8183/drivers/emi_mpu/emi_mpu.c#L132 v5: Rebase on latest linux-next v4: - Fix spinlock bad magic - Use rmem->name for debugfs entry - Address the comments in v3 v3: Using only one reserved memory region for both streaming DMA and memory allocation. https://lore.kernel.org/patchwork/cover/1360992/ v2: Building on top of swiotlb. https://lore.kernel.org/patchwork/cover/1280705/ v1: Using dma_map_ops. https://lore.kernel.org/patchwork/cover/1271660/ Claire Chang (16): swiotlb: Fix the type of index swiotlb: Refactor swiotlb init functions swiotlb: Refactor swiotlb_create_debugfs swiotlb: Add DMA_RESTRICTED_POOL swiotlb: Add restricted DMA pool initialization swiotlb: Add a new get_io_tlb_mem getter swiotlb: Update is_swiotlb_buffer to add a struct device argument swiotlb: Update is_swiotlb_active to add a struct device argument swiotlb: Bounce data from/to restricted DMA pool if available swiotlb: Move alloc_size to find_slots swiotlb: Refactor swiotlb_tbl_unmap_single dma-direct: Add a new wrapper __dma_direct_free_pages() swiotlb: Add restricted DMA alloc/free support. dma-direct: Allocate memory from restricted DMA pool if available dt-bindings: of: Add restricted DMA pool of: Add plumbing for restricted DMA pool .../reserved-memory/reserved-memory.txt | 24 ++ drivers/gpu/drm/i915/gem/i915_gem_internal.c | 2 +- drivers/gpu/drm/nouveau/nouveau_ttm.c | 2 +- drivers/iommu/dma-iommu.c | 12 +- drivers/of/address.c | 25 ++ drivers/of/device.c | 3 + drivers/of/of_private.h | 5 + drivers/pci/xen-pcifront.c | 2 +- drivers/xen/swiotlb-xen.c | 2 +- include/linux/device.h | 4 + include/linux/swiotlb.h | 41 ++- kernel/dma/Kconfig | 14 + kernel/dma/direct.c | 57 +++-- kernel/dma/direct.h | 9 +- kernel/dma/swiotlb.c | 242 +++++++++++++----- 15 files changed, 347 insertions(+), 97 deletions(-) -- 2.31.1.368.gbe11c130af-goog _______________________________________________ Nouveau mailing list Nouveau@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/nouveau 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,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 85A26C43462 for ; Thu, 22 Apr 2021 08:15:23 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 02FAF61457 for ; Thu, 22 Apr 2021 08:15:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 02FAF61457 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 9109583D3C; Thu, 22 Apr 2021 08:15:22 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BXNL2U19iIwU; Thu, 22 Apr 2021 08:15:21 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp1.osuosl.org (Postfix) with ESMTP id 510C883BC0; Thu, 22 Apr 2021 08:15:21 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 2A2B8C000F; Thu, 22 Apr 2021 08:15:21 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [IPv6:2605:bc80:3010::133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 81F24C000B for ; Thu, 22 Apr 2021 08:15:20 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 681B24015B for ; Thu, 22 Apr 2021 08:15:20 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp2.osuosl.org (amavisd-new); dkim=pass (1024-bit key) header.d=chromium.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Up6WJMliJkCi for ; Thu, 22 Apr 2021 08:15:19 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.8.0 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by smtp2.osuosl.org (Postfix) with ESMTPS id 4712540145 for ; Thu, 22 Apr 2021 08:15:19 +0000 (UTC) Received: by mail-pj1-x102d.google.com with SMTP id e8-20020a17090a7288b029014e51f5a6baso542042pjg.2 for ; Thu, 22 Apr 2021 01:15:19 -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:mime-version :content-transfer-encoding; bh=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=AMMWTSQCSdwHsUUdJCOC7YgUNrGXxRc8ufe8ShxXHlWgfWfBk0oS2HBubv7AQuSAMq M0urTLFpK7JN5/zRDUB5Fe/pClBUqpuo+IAb+avdRaxLPwR3C9WYDtIQPHvIq7nNv2DT 9Un/y51JxY/e6QYvwfJXjQ/aVxL0I13goxqlM= 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=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=GartKzcj6py0RhkuuQcgONJSNAOefaEpU233tyysAKbsWoLO+pMR1CD93cSic7Wv7w OmjOnYGW1nRhAhFftuLIJ/9GYQXS8ZlIrAr49SaXOG13YqZK+PGPT8s2c34vkyhhU4BF xJVg6jj0p29HKJKZJ9oAPcT5bEIBlwExloXwqQrUzn8GdrNIHWLxpVrizmrr80EEvarN 4mF6cD8TbngZd2pekxA5oSXMzIoABXXhUalg3fqu6KPYQx+gdecx7OiSmGJRsTrLtxNg 4RdeQVOXdMwNTqk7NPDvVmp97zXX3vC25jvPI32nRvrXFSjcwSc9EVJCFMvDlHtG5C0q s5ng== X-Gm-Message-State: AOAM530misT4zq3WfwLxKjdDQndN6RI/ObskOuIjp9g99KYlUILRC7D8 HZa4mnXTyKpYpfNozpuyVcDsxg== X-Google-Smtp-Source: ABdhPJyk2JPTp3iko6u7v5EX3M6TzCT5gzjwwnFh5uBqfgtgyUVxzY91nyUWyB+4tQ6Gme84DA/b2g== X-Received: by 2002:a17:902:edd5:b029:e9:7477:5f0a with SMTP id q21-20020a170902edd5b02900e974775f0amr2141960plk.81.1619079318644; Thu, 22 Apr 2021 01:15:18 -0700 (PDT) Received: from localhost ([2401:fa00:1:10:1a8e:1bde:f79e:c302]) by smtp.gmail.com with UTF8SMTPSA id r1sm1538054pjo.26.2021.04.22.01.15.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Apr 2021 01:15:18 -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 00/16] Restricted DMA Date: Thu, 22 Apr 2021 16:14:52 +0800 Message-Id: <20210422081508.3942748-1-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.368.gbe11c130af-goog MIME-Version: 1.0 Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, benh@kernel.crashing.org, joonas.lahtinen@linux.intel.com, 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 , daniel@ffwll.ch, airlied@linux.ie, maarten.lankhorst@linux.intel.com, linuxppc-dev@lists.ozlabs.org, jani.nikula@linux.intel.com, 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 , "list@263.net:IOMMU DRIVERS" , Jim Quinlan , Robin Murphy , bauerman@linux.ibm.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" This series implements mitigations for lack of DMA access control on systems without an IOMMU, which could result in the DMA accessing the system memory at unexpected times and/or unexpected addresses, possibly leading to data leakage or corruption. For example, we plan to use the PCI-e bus for Wi-Fi and that PCI-e bus is not behind an IOMMU. As PCI-e, by design, gives the device full access to system memory, a vulnerability in the Wi-Fi firmware could easily escalate to a full system exploit (remote wifi exploits: [1a], [1b] that shows a full chain of exploits; [2], [3]). To mitigate the security concerns, we introduce restricted DMA. Restricted DMA utilizes the existing swiotlb to bounce streaming DMA in and out of a specially allocated region and does memory allocation from the same region. The feature on its own provides a basic level of protection against the DMA overwriting buffer contents at unexpected times. However, to protect against general data leakage and system memory corruption, the system needs to provide a way to restrict the DMA to a predefined memory region (this is usually done at firmware level, e.g. MPU in ATF on some ARM platforms [4]). [1a] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_4.html [1b] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_11.html [2] https://blade.tencent.com/en/advisories/qualpwn/ [3] https://www.bleepingcomputer.com/news/security/vulnerabilities-found-in-highly-popular-firmware-for-wifi-chips/ [4] https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/mediatek/mt8183/drivers/emi_mpu/emi_mpu.c#L132 v5: Rebase on latest linux-next v4: - Fix spinlock bad magic - Use rmem->name for debugfs entry - Address the comments in v3 v3: Using only one reserved memory region for both streaming DMA and memory allocation. https://lore.kernel.org/patchwork/cover/1360992/ v2: Building on top of swiotlb. https://lore.kernel.org/patchwork/cover/1280705/ v1: Using dma_map_ops. https://lore.kernel.org/patchwork/cover/1271660/ Claire Chang (16): swiotlb: Fix the type of index swiotlb: Refactor swiotlb init functions swiotlb: Refactor swiotlb_create_debugfs swiotlb: Add DMA_RESTRICTED_POOL swiotlb: Add restricted DMA pool initialization swiotlb: Add a new get_io_tlb_mem getter swiotlb: Update is_swiotlb_buffer to add a struct device argument swiotlb: Update is_swiotlb_active to add a struct device argument swiotlb: Bounce data from/to restricted DMA pool if available swiotlb: Move alloc_size to find_slots swiotlb: Refactor swiotlb_tbl_unmap_single dma-direct: Add a new wrapper __dma_direct_free_pages() swiotlb: Add restricted DMA alloc/free support. dma-direct: Allocate memory from restricted DMA pool if available dt-bindings: of: Add restricted DMA pool of: Add plumbing for restricted DMA pool .../reserved-memory/reserved-memory.txt | 24 ++ drivers/gpu/drm/i915/gem/i915_gem_internal.c | 2 +- drivers/gpu/drm/nouveau/nouveau_ttm.c | 2 +- drivers/iommu/dma-iommu.c | 12 +- drivers/of/address.c | 25 ++ drivers/of/device.c | 3 + drivers/of/of_private.h | 5 + drivers/pci/xen-pcifront.c | 2 +- drivers/xen/swiotlb-xen.c | 2 +- include/linux/device.h | 4 + include/linux/swiotlb.h | 41 ++- kernel/dma/Kconfig | 14 + kernel/dma/direct.c | 57 +++-- kernel/dma/direct.h | 9 +- kernel/dma/swiotlb.c | 242 +++++++++++++----- 15 files changed, 347 insertions(+), 97 deletions(-) -- 2.31.1.368.gbe11c130af-goog _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,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 76639C433B4 for ; Thu, 22 Apr 2021 09:10:42 +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 2221E61490 for ; Thu, 22 Apr 2021 09:10:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2221E61490 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 4A4C76EA55; Thu, 22 Apr 2021 09:10:16 +0000 (UTC) Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by gabe.freedesktop.org (Postfix) with ESMTPS id 150886EA41 for ; Thu, 22 Apr 2021 08:15:19 +0000 (UTC) Received: by mail-pj1-x1033.google.com with SMTP id nm3-20020a17090b19c3b029014e1bbf6c60so529882pjb.4 for ; Thu, 22 Apr 2021 01:15:19 -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:mime-version :content-transfer-encoding; bh=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=AMMWTSQCSdwHsUUdJCOC7YgUNrGXxRc8ufe8ShxXHlWgfWfBk0oS2HBubv7AQuSAMq M0urTLFpK7JN5/zRDUB5Fe/pClBUqpuo+IAb+avdRaxLPwR3C9WYDtIQPHvIq7nNv2DT 9Un/y51JxY/e6QYvwfJXjQ/aVxL0I13goxqlM= 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=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=WVVoA4n8eX7ebpYgq4xAUBFAvXou6KwowdpBenXk08A5kasoCIdrAZ4XLxQpREuZ5X UJ8wl/RPw1uHVCUtlXKAoEPP+9uBjAYOxbs6k8DrXycypuuFRsmlyQq+wzvL0eMt8yjA LZ76+Y/EZ9Y2tdqS04qmkrQu27f8oDwnl+jlKzlnAjjQ7OqPu3lJPue5/Lg0d5Xz9H6a sxGrF6d1G7aadoLptFRiAEVTaL0HdQUB3dX/my2UhZwyY/1+CkW2WwjxAKQIkjfXdaw0 LBVDlaiRO+JPTqLo14cMS0lzoqoIBYAVpEHCmMHyq0K/BJSyBIqZbnpmEjkx00SKYvyl j72g== X-Gm-Message-State: AOAM53134iGp+ToO+/1biBj2Tea3Oel7e4eWMeLQpyraqSO2Vm1ly+4o TTOn3aClNRDsi+1qggdr4qhYyw== X-Google-Smtp-Source: ABdhPJyk2JPTp3iko6u7v5EX3M6TzCT5gzjwwnFh5uBqfgtgyUVxzY91nyUWyB+4tQ6Gme84DA/b2g== X-Received: by 2002:a17:902:edd5:b029:e9:7477:5f0a with SMTP id q21-20020a170902edd5b02900e974775f0amr2141960plk.81.1619079318644; Thu, 22 Apr 2021 01:15:18 -0700 (PDT) Received: from localhost ([2401:fa00:1:10:1a8e:1bde:f79e:c302]) by smtp.gmail.com with UTF8SMTPSA id r1sm1538054pjo.26.2021.04.22.01.15.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Apr 2021 01:15:18 -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 00/16] Restricted DMA Date: Thu, 22 Apr 2021 16:14:52 +0800 Message-Id: <20210422081508.3942748-1-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.368.gbe11c130af-goog 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This series implements mitigations for lack of DMA access control on systems without an IOMMU, which could result in the DMA accessing the system memory at unexpected times and/or unexpected addresses, possibly leading to data leakage or corruption. For example, we plan to use the PCI-e bus for Wi-Fi and that PCI-e bus is not behind an IOMMU. As PCI-e, by design, gives the device full access to system memory, a vulnerability in the Wi-Fi firmware could easily escalate to a full system exploit (remote wifi exploits: [1a], [1b] that shows a full chain of exploits; [2], [3]). To mitigate the security concerns, we introduce restricted DMA. Restricted DMA utilizes the existing swiotlb to bounce streaming DMA in and out of a specially allocated region and does memory allocation from the same region. The feature on its own provides a basic level of protection against the DMA overwriting buffer contents at unexpected times. However, to protect against general data leakage and system memory corruption, the system needs to provide a way to restrict the DMA to a predefined memory region (this is usually done at firmware level, e.g. MPU in ATF on some ARM platforms [4]). [1a] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_4.html [1b] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_11.html [2] https://blade.tencent.com/en/advisories/qualpwn/ [3] https://www.bleepingcomputer.com/news/security/vulnerabilities-found-in-highly-popular-firmware-for-wifi-chips/ [4] https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/mediatek/mt8183/drivers/emi_mpu/emi_mpu.c#L132 v5: Rebase on latest linux-next v4: - Fix spinlock bad magic - Use rmem->name for debugfs entry - Address the comments in v3 v3: Using only one reserved memory region for both streaming DMA and memory allocation. https://lore.kernel.org/patchwork/cover/1360992/ v2: Building on top of swiotlb. https://lore.kernel.org/patchwork/cover/1280705/ v1: Using dma_map_ops. https://lore.kernel.org/patchwork/cover/1271660/ Claire Chang (16): swiotlb: Fix the type of index swiotlb: Refactor swiotlb init functions swiotlb: Refactor swiotlb_create_debugfs swiotlb: Add DMA_RESTRICTED_POOL swiotlb: Add restricted DMA pool initialization swiotlb: Add a new get_io_tlb_mem getter swiotlb: Update is_swiotlb_buffer to add a struct device argument swiotlb: Update is_swiotlb_active to add a struct device argument swiotlb: Bounce data from/to restricted DMA pool if available swiotlb: Move alloc_size to find_slots swiotlb: Refactor swiotlb_tbl_unmap_single dma-direct: Add a new wrapper __dma_direct_free_pages() swiotlb: Add restricted DMA alloc/free support. dma-direct: Allocate memory from restricted DMA pool if available dt-bindings: of: Add restricted DMA pool of: Add plumbing for restricted DMA pool .../reserved-memory/reserved-memory.txt | 24 ++ drivers/gpu/drm/i915/gem/i915_gem_internal.c | 2 +- drivers/gpu/drm/nouveau/nouveau_ttm.c | 2 +- drivers/iommu/dma-iommu.c | 12 +- drivers/of/address.c | 25 ++ drivers/of/device.c | 3 + drivers/of/of_private.h | 5 + drivers/pci/xen-pcifront.c | 2 +- drivers/xen/swiotlb-xen.c | 2 +- include/linux/device.h | 4 + include/linux/swiotlb.h | 41 ++- kernel/dma/Kconfig | 14 + kernel/dma/direct.c | 57 +++-- kernel/dma/direct.h | 9 +- kernel/dma/swiotlb.c | 242 +++++++++++++----- 15 files changed, 347 insertions(+), 97 deletions(-) -- 2.31.1.368.gbe11c130af-goog _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 62BD5C433ED for ; Thu, 22 Apr 2021 08:15:21 +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 062F1613C3 for ; Thu, 22 Apr 2021 08:15:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 062F1613C3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3CEC96EA50; Thu, 22 Apr 2021 08:15:20 +0000 (UTC) Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1D5CD6EA44 for ; Thu, 22 Apr 2021 08:15:19 +0000 (UTC) Received: by mail-pj1-x102d.google.com with SMTP id f11-20020a17090a638bb02901524d3a3d48so539234pjj.3 for ; Thu, 22 Apr 2021 01:15:19 -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:mime-version :content-transfer-encoding; bh=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=AMMWTSQCSdwHsUUdJCOC7YgUNrGXxRc8ufe8ShxXHlWgfWfBk0oS2HBubv7AQuSAMq M0urTLFpK7JN5/zRDUB5Fe/pClBUqpuo+IAb+avdRaxLPwR3C9WYDtIQPHvIq7nNv2DT 9Un/y51JxY/e6QYvwfJXjQ/aVxL0I13goxqlM= 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=FvJrG6v4LzxdU4oF5EoFjO30pTB4A85M49SYo7WPBCw=; b=lRu/A/akXPS2NRLJ2/9vQvCHO6IUfqzH9Gs3Yuxx1AZUVzOlKLeIlPF7CorSUIQ5uo og41dPwPxghN26BBJH3gIv9KOQpgQ0vgMYLmfVz7JLTolvrJOki8r7/NYSBnIx03irIo hD8rlGFVKO9cYoFqoac65NdbfG8RNie+iz3ztDHWzawtmWCQXvT6UCjkpjYmFzjlD+up mI1FuhGaGZTvRiZQ2kULRw8APBwJGsHKv/xyla67SnzWhFBkMoKZ1aidxfVM6Dqv2Qov qFHL4hOfM23zucDO3dsz8vOOANXFYaiCvWH+XvwpHTzf/UAaHjYn/anIK1P3PcNyY90T EUUw== X-Gm-Message-State: AOAM530SCKUSNzqsgKdyy+kpX0M2DQTB0EAoTMbq4bZ3LoIuPkzAtwIG ihRQI1LtDQHcmigZANtcNxeDpg== X-Google-Smtp-Source: ABdhPJyk2JPTp3iko6u7v5EX3M6TzCT5gzjwwnFh5uBqfgtgyUVxzY91nyUWyB+4tQ6Gme84DA/b2g== X-Received: by 2002:a17:902:edd5:b029:e9:7477:5f0a with SMTP id q21-20020a170902edd5b02900e974775f0amr2141960plk.81.1619079318644; Thu, 22 Apr 2021 01:15:18 -0700 (PDT) Received: from localhost ([2401:fa00:1:10:1a8e:1bde:f79e:c302]) by smtp.gmail.com with UTF8SMTPSA id r1sm1538054pjo.26.2021.04.22.01.15.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Apr 2021 01:15:18 -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 Date: Thu, 22 Apr 2021 16:14:52 +0800 Message-Id: <20210422081508.3942748-1-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.368.gbe11c130af-goog MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v5 00/16] Restricted DMA X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & 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, benh@kernel.crashing.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 , 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This series implements mitigations for lack of DMA access control on systems without an IOMMU, which could result in the DMA accessing the system memory at unexpected times and/or unexpected addresses, possibly leading to data leakage or corruption. For example, we plan to use the PCI-e bus for Wi-Fi and that PCI-e bus is not behind an IOMMU. As PCI-e, by design, gives the device full access to system memory, a vulnerability in the Wi-Fi firmware could easily escalate to a full system exploit (remote wifi exploits: [1a], [1b] that shows a full chain of exploits; [2], [3]). To mitigate the security concerns, we introduce restricted DMA. Restricted DMA utilizes the existing swiotlb to bounce streaming DMA in and out of a specially allocated region and does memory allocation from the same region. The feature on its own provides a basic level of protection against the DMA overwriting buffer contents at unexpected times. However, to protect against general data leakage and system memory corruption, the system needs to provide a way to restrict the DMA to a predefined memory region (this is usually done at firmware level, e.g. MPU in ATF on some ARM platforms [4]). [1a] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_4.html [1b] https://googleprojectzero.blogspot.com/2017/04/over-air-exploiting-broadcoms-wi-fi_11.html [2] https://blade.tencent.com/en/advisories/qualpwn/ [3] https://www.bleepingcomputer.com/news/security/vulnerabilities-found-in-highly-popular-firmware-for-wifi-chips/ [4] https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/mediatek/mt8183/drivers/emi_mpu/emi_mpu.c#L132 v5: Rebase on latest linux-next v4: - Fix spinlock bad magic - Use rmem->name for debugfs entry - Address the comments in v3 v3: Using only one reserved memory region for both streaming DMA and memory allocation. https://lore.kernel.org/patchwork/cover/1360992/ v2: Building on top of swiotlb. https://lore.kernel.org/patchwork/cover/1280705/ v1: Using dma_map_ops. https://lore.kernel.org/patchwork/cover/1271660/ Claire Chang (16): swiotlb: Fix the type of index swiotlb: Refactor swiotlb init functions swiotlb: Refactor swiotlb_create_debugfs swiotlb: Add DMA_RESTRICTED_POOL swiotlb: Add restricted DMA pool initialization swiotlb: Add a new get_io_tlb_mem getter swiotlb: Update is_swiotlb_buffer to add a struct device argument swiotlb: Update is_swiotlb_active to add a struct device argument swiotlb: Bounce data from/to restricted DMA pool if available swiotlb: Move alloc_size to find_slots swiotlb: Refactor swiotlb_tbl_unmap_single dma-direct: Add a new wrapper __dma_direct_free_pages() swiotlb: Add restricted DMA alloc/free support. dma-direct: Allocate memory from restricted DMA pool if available dt-bindings: of: Add restricted DMA pool of: Add plumbing for restricted DMA pool .../reserved-memory/reserved-memory.txt | 24 ++ drivers/gpu/drm/i915/gem/i915_gem_internal.c | 2 +- drivers/gpu/drm/nouveau/nouveau_ttm.c | 2 +- drivers/iommu/dma-iommu.c | 12 +- drivers/of/address.c | 25 ++ drivers/of/device.c | 3 + drivers/of/of_private.h | 5 + drivers/pci/xen-pcifront.c | 2 +- drivers/xen/swiotlb-xen.c | 2 +- include/linux/device.h | 4 + include/linux/swiotlb.h | 41 ++- kernel/dma/Kconfig | 14 + kernel/dma/direct.c | 57 +++-- kernel/dma/direct.h | 9 +- kernel/dma/swiotlb.c | 242 +++++++++++++----- 15 files changed, 347 insertions(+), 97 deletions(-) -- 2.31.1.368.gbe11c130af-goog _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx