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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 215AAC433ED for ; Tue, 20 Apr 2021 02:55:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E01CD613B3 for ; Tue, 20 Apr 2021 02:55:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229515AbhDTC4I (ORCPT ); Mon, 19 Apr 2021 22:56:08 -0400 Received: from mga04.intel.com ([192.55.52.120]:44248 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229508AbhDTC4I (ORCPT ); Mon, 19 Apr 2021 22:56:08 -0400 IronPort-SDR: edVZBTkDAL8hrKhLzk5bV0ia7wFsQHyxCR9rr3MN+mvkaELGeqM+cRdUSq2PGEzg0+kMxh3/qe C8xR2nOHuX0g== X-IronPort-AV: E=McAfee;i="6200,9189,9959"; a="193308685" X-IronPort-AV: E=Sophos;i="5.82,235,1613462400"; d="scan'208";a="193308685" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Apr 2021 19:55:37 -0700 IronPort-SDR: CAJVH2FbCBXOeh6Kk14yftkJhGYblD+fDKdZFAavVfQs8qrSKUvF5hKBHiy3H9PwQ/ci15O3Iu SZ1MWQiQOfqQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,235,1613462400"; d="scan'208";a="400848296" Received: from ipu5-build.bj.intel.com ([10.238.232.202]) by orsmga002.jf.intel.com with ESMTP; 19 Apr 2021 19:55:32 -0700 From: Bingbu Cao To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org Cc: dwmw2@infradead.org, baolu.lu@linux.intel.com, joro@8bytes.org, will@kernel.org, bhelgaas@google.com, rajatja@google.com, grundler@chromium.org, tfiga@chromium.org, senozhatsky@chromium.org, sakari.ailus@linux.intel.com, andriy.shevchenko@linux.intel.com, bingbu.cao@intel.com, bingbu.cao@linux.intel.com Subject: [RESEND v2] iommu/vt-d: Use passthrough mode for the Intel IPUs Date: Tue, 20 Apr 2021 10:48:33 +0800 Message-Id: <1618886913-6594-1-git-send-email-bingbu.cao@intel.com> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Intel IPU(Image Processing Unit) has its own (IO)MMU hardware, The IPU driver allocates its own page table that is not mapped via the DMA, and thus the Intel IOMMU driver blocks access giving this error: DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:05.0] PASID ffffffff fault addr 76406000 [fault reason 06] PTE Read access is not set As IPU is not an external facing device which is not risky, so use IOMMU passthrough mode for Intel IPUs. Fixes: 26f5689592e2 ("media: staging/intel-ipu3: mmu: Implement driver") Signed-off-by: Bingbu Cao --- drivers/iommu/intel/iommu.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index ee0932307d64..7e2fbdae467e 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -55,6 +55,12 @@ #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY) #define IS_USB_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_SERIAL_USB) #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA) +#define IS_INTEL_IPU(pdev) ((pdev)->vendor == PCI_VENDOR_ID_INTEL && \ + ((pdev)->device == 0x9a19 || \ + (pdev)->device == 0x9a39 || \ + (pdev)->device == 0x4e19 || \ + (pdev)->device == 0x465d || \ + (pdev)->device == 0x1919)) #define IS_AZALIA(pdev) ((pdev)->vendor == 0x8086 && (pdev)->device == 0x3a3e) #define IOAPIC_RANGE_START (0xfee00000) @@ -360,6 +366,7 @@ int intel_iommu_enabled = 0; EXPORT_SYMBOL_GPL(intel_iommu_enabled); static int dmar_map_gfx = 1; +static int dmar_map_ipu = 1; static int dmar_forcedac; static int intel_iommu_strict; static int intel_iommu_superpage = 1; @@ -368,6 +375,7 @@ static int iommu_skip_te_disable; #define IDENTMAP_GFX 2 #define IDENTMAP_AZALIA 4 +#define IDENTMAP_IPU 8 int intel_iommu_gfx_mapped; EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped); @@ -2839,6 +2847,9 @@ static int device_def_domain_type(struct device *dev) if ((iommu_identity_mapping & IDENTMAP_GFX) && IS_GFX_DEVICE(pdev)) return IOMMU_DOMAIN_IDENTITY; + + if ((iommu_identity_mapping & IDENTMAP_IPU) && IS_INTEL_IPU(pdev)) + return IOMMU_DOMAIN_IDENTITY; } return 0; @@ -3278,6 +3289,9 @@ static int __init init_dmars(void) if (!dmar_map_gfx) iommu_identity_mapping |= IDENTMAP_GFX; + if (!dmar_map_ipu) + iommu_identity_mapping |= IDENTMAP_IPU; + check_tylersburg_isoch(); ret = si_domain_init(hw_pass_through); @@ -5622,6 +5636,18 @@ static void quirk_iommu_igfx(struct pci_dev *dev) dmar_map_gfx = 0; } +static void quirk_iommu_ipu(struct pci_dev *dev) +{ + if (!IS_INTEL_IPU(dev)) + return; + + if (risky_device(dev)) + return; + + pci_info(dev, "Passthrough IOMMU for integrated Intel IPU\n"); + dmar_map_ipu = 0; +} + /* G4x/GM45 integrated gfx dmar support is totally busted. */ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_igfx); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e00, quirk_iommu_igfx); @@ -5657,6 +5683,9 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x1632, quirk_iommu_igfx); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x163A, quirk_iommu_igfx); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x163D, quirk_iommu_igfx); +/* disable IPU dmar support */ +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, quirk_iommu_ipu); + static void quirk_iommu_rwbf(struct pci_dev *dev) { if (risky_device(dev)) -- 2.7.4