From patchwork Fri Aug 20 15:58:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brijesh Singh X-Patchwork-Id: 12449771 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 DF19AC432BE for ; Fri, 20 Aug 2021 16:00:00 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 745B961102 for ; Fri, 20 Aug 2021 16:00:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 745B961102 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amd.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 535A28D0003; Fri, 20 Aug 2021 11:59:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4E4CB8D0001; Fri, 20 Aug 2021 11:59:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3AB5A8D0003; Fri, 20 Aug 2021 11:59:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0181.hostedemail.com [216.40.44.181]) by kanga.kvack.org (Postfix) with ESMTP id 1E6358D0001 for ; Fri, 20 Aug 2021 11:59:59 -0400 (EDT) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id C155E1801C372 for ; Fri, 20 Aug 2021 15:59:58 +0000 (UTC) X-FDA: 78495920076.19.82285C9 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2087.outbound.protection.outlook.com [40.107.220.87]) by imf10.hostedemail.com (Postfix) with ESMTP id 3779D6001986 for ; Fri, 20 Aug 2021 15:59:58 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=W7diiwstASe75qgoTNSRcAwb9c6Ml2VgnmOnJbyiK8tMpifR5eTsDephieMtRc7FSPdbcPa6SzHT4Rc55WWYPMi01YuvIV7PymoY5ET/HPJzFBpB8/SlE5zKaAfPAogaE0zllRKseLFcBofXa1UiRWPO62f+yYEqfp0cQufVbFe7vVjBU+1Ggfg3WmMj+caZyZTYjY8uxF14ybbyAQDTxXNMcH48375VBjUQPxUXBtkYtHc8Lz8VIPJF96d9U4SvbLh/c04AoGyOBxBoV8a8obW/MvWkDTJwYwiEUuPnBFgZ2Na9M+opPPuDS3C0Zr5cINjDvqXfin6Y9sXZQRFnrg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=AD60n1Z9tX4RqoI9EAsyTRZUjD0EWMR8X/oIhpw0B2Q=; b=aiyLfgmdYD8cUrHCxOnMNKMo6ycNeRTuO98mqdXZQVPylu6/jmvzC3JTstRY8VgLC42pstGSAMZv46CZnyDLqlUHsyTYldYr/CwZKUdHLiXh2BXyYbVvBFVSZ7OdhIRHmwqfvbml8b7e/cuUGpZM1b9OJAvoqV8/Sa1bUATKGCzwRIJtlcq3RO9nsw0+LHNSumMvC7zejf4GSW48i6RSmXxE/w18K/OF0eHb+dpV2teJDWNY/+/4e4Qyla3OSyC6sONSHBKQsBR3e1f1ygeBRB2XA3yKp7x8UodMPufwiDIC+Zu/U4w/enSTRd1lb+xyA70bLc9l2wvQRsut0M1Dog== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=AD60n1Z9tX4RqoI9EAsyTRZUjD0EWMR8X/oIhpw0B2Q=; b=Z1J4KllzIen0O/9fp+Ku8RTaRYwCtvX5vaddJ183RgE3slgxe0UyX4E2eg7aZjAossDY7NCM2O9Ee74qRnO3P+k0Jam9RSKOQZyIbikcUXjNg/rOC9yUGGZXRf7Hkg/vBK3Q8o3V8pLE2pQxiG8Jdz+imGxTuo2Q3JARgs1250M= Received: from SN6PR12MB2718.namprd12.prod.outlook.com (2603:10b6:805:6f::22) by SN6PR12MB2685.namprd12.prod.outlook.com (2603:10b6:805:67::33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4415.21; Fri, 20 Aug 2021 15:59:55 +0000 Received: from SN6PR12MB2718.namprd12.prod.outlook.com ([fe80::78b7:7336:d363:9be3]) by SN6PR12MB2718.namprd12.prod.outlook.com ([fe80::78b7:7336:d363:9be3%6]) with mapi id 15.20.4436.019; Fri, 20 Aug 2021 15:59:55 +0000 From: Brijesh Singh To: x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-mm@kvack.org, linux-crypto@vger.kernel.org Cc: Thomas Gleixner , Ingo Molnar , Joerg Roedel , Tom Lendacky , "H. Peter Anvin" , Ard Biesheuvel , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Andy Lutomirski , Dave Hansen , Sergio Lopez , Peter Gonda , Peter Zijlstra , Srinivas Pandruvada , David Rientjes , Dov Murik , Tobin Feldman-Fitzthum , Borislav Petkov , Michael Roth , Vlastimil Babka , "Kirill A . Shutemov" , Andi Kleen , tony.luck@intel.com, marcorr@google.com, sathyanarayanan.kuppuswamy@linux.intel.com, Brijesh Singh Subject: [PATCH Part2 v5 01/45] x86/cpufeatures: Add SEV-SNP CPU feature Date: Fri, 20 Aug 2021 10:58:34 -0500 Message-Id: <20210820155918.7518-2-brijesh.singh@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210820155918.7518-1-brijesh.singh@amd.com> References: <20210820155918.7518-1-brijesh.singh@amd.com> X-ClientProxiedBy: SN7P222CA0013.NAMP222.PROD.OUTLOOK.COM (2603:10b6:806:124::11) To SN6PR12MB2718.namprd12.prod.outlook.com (2603:10b6:805:6f::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from sbrijesh-desktop.amd.com (165.204.77.1) by SN7P222CA0013.NAMP222.PROD.OUTLOOK.COM (2603:10b6:806:124::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4436.18 via Frontend Transport; Fri, 20 Aug 2021 15:59:53 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: a4809fd9-6392-4bd1-9a96-08d963f38d35 X-MS-TrafficTypeDiagnostic: SN6PR12MB2685: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4941; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR12MB2718.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(346002)(376002)(396003)(366004)(136003)(39860400002)(8676002)(316002)(54906003)(5660300002)(8936002)(1076003)(2906002)(478600001)(36756003)(4326008)(38100700002)(38350700002)(86362001)(6486002)(26005)(83380400001)(186003)(956004)(2616005)(44832011)(7696005)(66946007)(52116002)(66556008)(66476007)(7406005)(7416002)(6666004);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: a4809fd9-6392-4bd1-9a96-08d963f38d35 X-MS-Exchange-CrossTenant-AuthSource: SN6PR12MB2718.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Aug 2021 15:59:54.8777 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: QejYfc3VNo6yArmcth1hxichd1vqrBAhGggedSVEDbfdFNDoMV3utlb4n44ONIWufPiX5JDEtG1ibIhLE12LaQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR12MB2685 Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=amd.com header.s=selector1 header.b=Z1J4Kllz; spf=pass (imf10.hostedemail.com: domain of brijesh.singh@amd.com designates 40.107.220.87 as permitted sender) smtp.mailfrom=brijesh.singh@amd.com; dmarc=pass (policy=quarantine) header.from=amd.com X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 3779D6001986 X-Stat-Signature: r37d59gb5n54xewowt4waw1eyo31xdi9 X-HE-Tag: 1629475198-925740 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add CPU feature detection for Secure Encrypted Virtualization with Secure Nested Paging. This feature adds a strong memory integrity protection to help prevent malicious hypervisor-based attacks like data replay, memory re-mapping, and more. Signed-off-by: Brijesh Singh --- arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/kernel/cpu/amd.c | 3 ++- tools/arch/x86/include/asm/cpufeatures.h | 1 + 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index d0ce5cfd3ac1..62f458680772 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -398,6 +398,7 @@ #define X86_FEATURE_SEV (19*32+ 1) /* AMD Secure Encrypted Virtualization */ #define X86_FEATURE_VM_PAGE_FLUSH (19*32+ 2) /* "" VM Page Flush MSR is supported */ #define X86_FEATURE_SEV_ES (19*32+ 3) /* AMD Secure Encrypted Virtualization - Encrypted State */ +#define X86_FEATURE_SEV_SNP (19*32+4) /* AMD Secure Encrypted Virtualization - Secure Nested Paging */ #define X86_FEATURE_SME_COHERENT (19*32+10) /* "" AMD hardware-enforced cache coherency */ /* diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index b7c003013d41..3e6a586fb589 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -586,7 +586,7 @@ static void early_detect_mem_encrypt(struct cpuinfo_x86 *c) * If BIOS has not enabled SME then don't advertise the * SME feature (set in scattered.c). * For SEV: If BIOS has not enabled SEV then don't advertise the - * SEV and SEV_ES feature (set in scattered.c). + * SEV, SEV_ES and SEV_SNP feature. * * In all cases, since support for SME and SEV requires long mode, * don't advertise the feature under CONFIG_X86_32. @@ -618,6 +618,7 @@ static void early_detect_mem_encrypt(struct cpuinfo_x86 *c) clear_sev: setup_clear_cpu_cap(X86_FEATURE_SEV); setup_clear_cpu_cap(X86_FEATURE_SEV_ES); + setup_clear_cpu_cap(X86_FEATURE_SEV_SNP); } } diff --git a/tools/arch/x86/include/asm/cpufeatures.h b/tools/arch/x86/include/asm/cpufeatures.h index d0ce5cfd3ac1..62f458680772 100644 --- a/tools/arch/x86/include/asm/cpufeatures.h +++ b/tools/arch/x86/include/asm/cpufeatures.h @@ -398,6 +398,7 @@ #define X86_FEATURE_SEV (19*32+ 1) /* AMD Secure Encrypted Virtualization */ #define X86_FEATURE_VM_PAGE_FLUSH (19*32+ 2) /* "" VM Page Flush MSR is supported */ #define X86_FEATURE_SEV_ES (19*32+ 3) /* AMD Secure Encrypted Virtualization - Encrypted State */ +#define X86_FEATURE_SEV_SNP (19*32+4) /* AMD Secure Encrypted Virtualization - Secure Nested Paging */ #define X86_FEATURE_SME_COHERENT (19*32+10) /* "" AMD hardware-enforced cache coherency */ /*