Message ID | 20170216154632.19244.26080.stgit@tlendack-t1.amdoffice.net (mailing list archive) |
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Return-Path: <kvm-owner@kernel.org> Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id EA43160244 for <patchwork-kvm@patchwork.kernel.org>; Thu, 16 Feb 2017 15:50:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DBACE2861E for <patchwork-kvm@patchwork.kernel.org>; Thu, 16 Feb 2017 15:50:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D058C28620; Thu, 16 Feb 2017 15:50:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5BB422861E for <patchwork-kvm@patchwork.kernel.org>; Thu, 16 Feb 2017 15:50:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932830AbdBPPrI (ORCPT <rfc822;patchwork-kvm@patchwork.kernel.org>); Thu, 16 Feb 2017 10:47:08 -0500 Received: from mail-sn1nam01on0048.outbound.protection.outlook.com ([104.47.32.48]:31811 "EHLO NAM01-SN1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932326AbdBPPqn (ORCPT <rfc822;kvm@vger.kernel.org>); Thu, 16 Feb 2017 10:46:43 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amdcloud.onmicrosoft.com; s=selector1-amd-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=T7DnZU7Gz9syqtLZO68zMdSgx1xQS6TYI+hzX0zjtro=; b=B5FTvm7oIAXfLQN2WGEQMPl60xmYd+YJKVqZeu73f6JPbZdjkYHeLYV1YA/0z8fw2SsoIaYYh4rzlVtlDL5/yYa1A/rZzNHsmo1vgZU+mGB0pUtPz6/nhpEV9RXm/j8de2oobZX3+CoR2+UUfZqEk00DDLGRAh2yu+7+IG0LhhU= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=Thomas.Lendacky@amd.com; Received: from tlendack-t1.amdoffice.net (165.204.77.1) by CY4PR12MB1141.namprd12.prod.outlook.com (10.168.163.149) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.888.16; Thu, 16 Feb 2017 15:46:36 +0000 From: Tom Lendacky <thomas.lendacky@amd.com> Subject: [RFC PATCH v4 20/28] iommu/amd: Disable AMD IOMMU if memory encryption is active To: <linux-arch@vger.kernel.org>, <linux-efi@vger.kernel.org>, <kvm@vger.kernel.org>, <linux-doc@vger.kernel.org>, <x86@kernel.org>, <linux-kernel@vger.kernel.org>, <kasan-dev@googlegroups.com>, <linux-mm@kvack.org>, <iommu@lists.linux-foundation.org> CC: Rik van Riel <riel@redhat.com>, Radim =?utf-8?b?S3LEjW3DocWZ?= <rkrcmar@redhat.com>, Toshimitsu Kani <toshi.kani@hpe.com>, Arnd Bergmann <arnd@arndb.de>, Jonathan Corbet <corbet@lwn.net>, Matt Fleming <matt@codeblueprint.co.uk>, "Michael S. Tsirkin" <mst@redhat.com>, Joerg Roedel <joro@8bytes.org>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Paolo Bonzini <pbonzini@redhat.com>, Brijesh Singh <brijesh.singh@amd.com>, Ingo Molnar <mingo@redhat.com>, Alexander Potapenko <glider@google.com>, Andy Lutomirski <luto@kernel.org>, "H. 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diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 6799cf9..6df2dd5 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -29,6 +29,7 @@ #include <linux/export.h> #include <linux/iommu.h> #include <linux/kmemleak.h> +#include <linux/mem_encrypt.h> #include <asm/pci-direct.h> #include <asm/iommu.h> #include <asm/gart.h> @@ -2544,6 +2545,12 @@ int __init amd_iommu_detect(void) if (amd_iommu_disabled) return -ENODEV; + /* For now, disable the IOMMU if SME is active */ + if (sme_active()) { + pr_notice("AMD-Vi: SME is active, disabling the IOMMU\n"); + return -ENODEV; + } + ret = iommu_go_to_state(IOMMU_IVRS_DETECTED); if (ret) return ret;
For now, disable the AMD IOMMU if memory encryption is active. A future patch will re-enable the function with full memory encryption support. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> --- drivers/iommu/amd_iommu_init.c | 7 +++++++ 1 file changed, 7 insertions(+)