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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 43E3EC433E1 for ; Mon, 24 Aug 2020 10:54:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1CF8F2071E for ; Mon, 24 Aug 2020 10:54:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726834AbgHXKyW (ORCPT ); Mon, 24 Aug 2020 06:54:22 -0400 Received: from 8bytes.org ([81.169.241.247]:39242 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726632AbgHXKyS (ORCPT ); Mon, 24 Aug 2020 06:54:18 -0400 Received: from cap.home.8bytes.org (p4ff2bb8d.dip0.t-ipconnect.de [79.242.187.141]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by theia.8bytes.org (Postfix) with ESMTPSA id AD0D436B; Mon, 24 Aug 2020 12:54:17 +0200 (CEST) From: Joerg Roedel To: iommu@lists.linux-foundation.org Cc: Joerg Roedel , jroedel@suse.de, Tom Lendacky , Suravee Suthikulpanit , Alexander.Deucher@amd.com, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] iommu/amd: Do not use IOMMUv2 functionality when SME is active Date: Mon, 24 Aug 2020 12:54:15 +0200 Message-Id: <20200824105415.21000-3-joro@8bytes.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200824105415.21000-1-joro@8bytes.org> References: <20200824105415.21000-1-joro@8bytes.org> 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: Joerg Roedel When memory encryption is active the device is likely not in a direct mapped domain. Forbid using IOMMUv2 functionality for now until finer grained checks for this have been implemented. Signed-off-by: Joerg Roedel --- drivers/iommu/amd/iommu_v2.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/iommu/amd/iommu_v2.c b/drivers/iommu/amd/iommu_v2.c index c259108ab6dd..0d175aed1d92 100644 --- a/drivers/iommu/amd/iommu_v2.c +++ b/drivers/iommu/amd/iommu_v2.c @@ -737,6 +737,13 @@ int amd_iommu_init_device(struct pci_dev *pdev, int pasids) might_sleep(); + /* + * When memory encryption is active the device is likely not in a + * direct-mapped domain. Forbid using IOMMUv2 functionality for now. + */ + if (mem_encrypt_active()) + return -ENODEV; + if (!amd_iommu_v2_supported()) return -ENODEV; -- 2.28.0