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=-6.8 required=3.0 tests=BAYES_00, 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 1BA05C2D0E2 for ; Tue, 22 Sep 2020 21:20:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D095A20888 for ; Tue, 22 Sep 2020 21:20:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726631AbgIVVUu (ORCPT ); Tue, 22 Sep 2020 17:20:50 -0400 Received: from mga04.intel.com ([192.55.52.120]:47227 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726448AbgIVVUu (ORCPT ); Tue, 22 Sep 2020 17:20:50 -0400 IronPort-SDR: fpuJoTrJBxQjwgCXu6c+Wefbi+N9vsNtXN0935BSo26+54VXsUtz8NeV04rLplwxCxQ3trzacH Fb9zzvtCnpPQ== X-IronPort-AV: E=McAfee;i="6000,8403,9752"; a="158093404" X-IronPort-AV: E=Sophos;i="5.77,292,1596524400"; d="scan'208";a="158093404" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Sep 2020 14:20:49 -0700 IronPort-SDR: F5jcSKWyUM+mVFsGRH8HH9aEu9+OgFxKJvBk9m3GXgSeIxhLPZ9PkEhJGVvIWSwDKps5sHhRJW JNN0wWnEP7Gg== X-IronPort-AV: E=Sophos;i="5.77,292,1596524400"; d="scan'208";a="511368011" Received: from km-skylake-client-platform.sc.intel.com ([10.3.52.153]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Sep 2020 14:20:49 -0700 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, sohil.mehta@intel.com, ravi.v.shankar@intel.com, ricardo.neri@intel.com, ashok.raj@intel.com, kevin.tian@intel.com, yi.l.liu@intel.com, Kyung Min Park Subject: [PATCH 0/4] Audit Capability and Extended Capability among IOMMUs Date: Tue, 22 Sep 2020 14:02:36 -0700 Message-Id: <20200922210240.27178-1-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 Kyung Min Park (4): iommu/vt-d: Disable SVM in the platform when IOMMUs have inconsistencies iommu/vt-d: Report out when IOMMU features have inconsistencies iommu/vt-d: Audit IOMMUs for Interrupt Remapping features iommu/vt-d: Scale capability to the lowest supported between the IOMMUs drivers/iommu/intel/Makefile | 4 +- drivers/iommu/intel/audit.c | 193 ++++++++++++++++++++++++++++ drivers/iommu/intel/audit.h | 103 +++++++++++++++ drivers/iommu/intel/iommu.c | 12 +- drivers/iommu/intel/irq_remapping.c | 8 ++ include/linux/intel-iommu.h | 3 + 6 files changed, 320 insertions(+), 3 deletions(-) create mode 100644 drivers/iommu/intel/audit.c create mode 100644 drivers/iommu/intel/audit.h -- 2.17.1