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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,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 6C1A4C433DB for ; Wed, 6 Jan 2021 01:52:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32C4622D75 for ; Wed, 6 Jan 2021 01:52:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726052AbhAFBwb (ORCPT ); Tue, 5 Jan 2021 20:52:31 -0500 Received: from mga12.intel.com ([192.55.52.136]:48745 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725778AbhAFBwa (ORCPT ); Tue, 5 Jan 2021 20:52:30 -0500 IronPort-SDR: lymGc/azJ1Bw0jNC1sLRfzpOTSlWWZibAYIg/j8jTdS2WME2annbYYXQ/cP98QOMnAKJOnOMSu shhto7fgklBw== X-IronPort-AV: E=McAfee;i="6000,8403,9855"; a="156402495" X-IronPort-AV: E=Sophos;i="5.78,478,1599548400"; d="scan'208";a="156402495" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2021 17:51:50 -0800 IronPort-SDR: QAz4tl1dFNjrArGzYCE5AHO5KTudeizzxbVy8iC428crbeCWwOJyZFIKy98Bp4egqnENnYdf5A B0rKwgZhMc3g== X-IronPort-AV: E=Sophos;i="5.78,478,1599548400"; d="scan'208";a="361387904" Received: from km-skylake-client-platform.sc.intel.com ([10.3.52.146]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2021 17:51:49 -0800 From: Kyung Min Park To: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org Cc: dwmw2@infradead.org, baolu.lu@linux.intel.com, joro@8bytes.org, will@kernel.org, ricardo.neri@intel.com, ravi.v.shankar@intel.com, kevin.tian@intel.com, ashok.raj@intel.com, sohil.mehta@intel.com, kyung.min.park@intel.com Subject: [PATCH v4 0/3] Audit Capability and Extended Capability among IOMMUs Date: Tue, 5 Jan 2021 17:30:32 -0800 Message-Id: <20210106013035.6476-1-kyung.min.park@intel.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Modern platforms have more than one IOMMU. Each IOMMU has its own feature set. Some of these features must be consistent among IOMMUs. Otherwise, these differences can lead to improper behavior in the system. On the other hand, for some features, each IOMMU can have different capacity values. So, different actions are required to deal with the inconsistencies depending on the IOMMU features. Currently, some inconsistencies are ignored by the IOMMU driver. This patchset checks IOMMU capabilities and extended capabilities centralizedly during boot and take different actions according to the impacts caused by the mismatches. For example: 1. Disable Shared Virtual Memory. 2. Use common capacity values (normally the lowest capacity value) for all IOMMUs. 3. Report feature mismatches. Detailed information on the IOMMU Capability / Extended Capability can be found in Intel VT-d Specification. Link: https://software.intel.com/sites/default/files/managed/c5/15/vt-directed-io-spec.pdf ChangeLog: - Change from v3 to v4: 1. fix the build error for when only enabled irq remapping. - Change from v2 to v3: 1. fix the wrong macro names and rebase to v5.10. - Change from v1 to v2: 1. Add missing cap/ecaps for audit. 2. Refactor function/macros overal suggested by Lu, Baolu. 2. Skip audit for gfx dedicated IOMMU. 3. Change commit message. Kyung Min Park (3): iommu/vt-d: Audit IOMMU Capabilities and add helper functions iommu/vt-d: Move capability check code to cap_audit files iommu/vt-d: Disable SVM in the platform when IOMMUs have inconsistencies drivers/iommu/intel/Makefile | 4 +- drivers/iommu/intel/cap_audit.c | 219 ++++++++++++++++++++++++++++ drivers/iommu/intel/cap_audit.h | 132 +++++++++++++++++ drivers/iommu/intel/iommu.c | 85 ++--------- drivers/iommu/intel/irq_remapping.c | 8 + drivers/iommu/intel/svm.c | 3 +- include/linux/intel-iommu.h | 39 ++--- 7 files changed, 395 insertions(+), 95 deletions(-) create mode 100644 drivers/iommu/intel/cap_audit.c create mode 100644 drivers/iommu/intel/cap_audit.h -- 2.17.1