Message ID | 20190710201244.25195-8-brijesh.singh@amd.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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-2.web.codeaurora.org (Postfix) with ESMTP id 94BFD138D for <patchwork-kvm@patchwork.kernel.org>; Wed, 10 Jul 2019 20:13:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8511E28A1A for <patchwork-kvm@patchwork.kernel.org>; Wed, 10 Jul 2019 20:13:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7966828A17; Wed, 10 Jul 2019 20:13:27 +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=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham 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 0866C28A1A for <patchwork-kvm@patchwork.kernel.org>; Wed, 10 Jul 2019 20:13:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728435AbfGJUNZ (ORCPT <rfc822;patchwork-kvm@patchwork.kernel.org>); Wed, 10 Jul 2019 16:13:25 -0400 Received: from mail-eopbgr790054.outbound.protection.outlook.com ([40.107.79.54]:57219 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728424AbfGJUNZ (ORCPT <rfc822;kvm@vger.kernel.org>); Wed, 10 Jul 2019 16:13:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amdcloud.onmicrosoft.com; s=selector1-amdcloud-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=I0lXV5tySe2KfbECTa8PFrwmGekrzFQvQXc0vjomi4M=; b=XOaDJSN/MIG0HfJu/LsA2FSRlEOuRt4aoAIld1IrbCEvpz6dh2YUloDIf3XT6GU4y9Tnli90qYBL1maXDAQvcdRyZOCvMoIqugearAUN1w/rJelHmgPw9lxdICuQgsZJ4jkzagojv603BGLu2RiIKExdWpzxH5sFFnLMbwGs5Y4= Received: from DM6PR12MB2682.namprd12.prod.outlook.com (20.176.116.31) by DM6PR12MB3756.namprd12.prod.outlook.com (10.255.172.157) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2052.19; Wed, 10 Jul 2019 20:13:08 +0000 Received: from DM6PR12MB2682.namprd12.prod.outlook.com ([fe80::bc1a:a30d:9da2:1cdd]) by DM6PR12MB2682.namprd12.prod.outlook.com ([fe80::bc1a:a30d:9da2:1cdd%6]) with mapi id 15.20.2073.008; Wed, 10 Jul 2019 20:13:08 +0000 From: "Singh, Brijesh" <brijesh.singh@amd.com> To: "kvm@vger.kernel.org" <kvm@vger.kernel.org> CC: "Singh, Brijesh" <brijesh.singh@amd.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, Paolo Bonzini <pbonzini@redhat.com>, =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>, Joerg Roedel <joro@8bytes.org>, Borislav Petkov <bp@suse.de>, "Lendacky, Thomas" <Thomas.Lendacky@amd.com>, "x86@kernel.org" <x86@kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org> Subject: [PATCH v3 07/11] KVM: x86: Add AMD SEV specific Hypercall3 Thread-Topic: [PATCH v3 07/11] KVM: x86: Add AMD SEV specific Hypercall3 Thread-Index: AQHVN1vjMQXW4t+xaUqH2ZDry8JE4w== Date: Wed, 10 Jul 2019 20:13:08 +0000 Message-ID: <20190710201244.25195-8-brijesh.singh@amd.com> References: <20190710201244.25195-1-brijesh.singh@amd.com> In-Reply-To: <20190710201244.25195-1-brijesh.singh@amd.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SN4PR0501CA0014.namprd05.prod.outlook.com (2603:10b6:803:40::27) To DM6PR12MB2682.namprd12.prod.outlook.com (2603:10b6:5:4a::31) authentication-results: spf=none (sender IP is ) smtp.mailfrom=brijesh.singh@amd.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.17.1 x-originating-ip: [165.204.77.1] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: a561f9d9-1bdf-4981-1cce-08d70573065d x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(4618075)(2017052603328)(7193020);SRVR:DM6PR12MB3756; x-ms-traffictypediagnostic: DM6PR12MB3756: x-microsoft-antispam-prvs: <DM6PR12MB37567D570C55AF26F1D17EE5E5F00@DM6PR12MB3756.namprd12.prod.outlook.com> x-ms-oob-tlc-oobclassifiers: OLM:3513; x-forefront-prvs: 0094E3478A x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(4636009)(346002)(136003)(376002)(396003)(39860400002)(366004)(189003)(199004)(6436002)(4326008)(8676002)(71200400001)(6512007)(7736002)(6116002)(99286004)(476003)(66066001)(71190400001)(478600001)(5640700003)(1730700003)(256004)(2351001)(53936002)(486006)(2501003)(6486002)(50226002)(386003)(316002)(81156014)(81166006)(54906003)(76176011)(66946007)(66446008)(5660300002)(64756008)(66476007)(66556008)(6506007)(3846002)(305945005)(68736007)(102836004)(2906002)(52116002)(186003)(7416002)(1076003)(25786009)(6916009)(2616005)(26005)(8936002)(14454004)(11346002)(86362001)(446003)(36756003);DIR:OUT;SFP:1101;SCL:1;SRVR:DM6PR12MB3756;H:DM6PR12MB2682.namprd12.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: amd.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: pfNSbdSrzJncI/QvJwIb692jq+B121K9PtQpo3n/lMUcgybYw7hiAO2KXqk2ELfO9uNqG6s8FscmyvOKwYOen4RjC1eD7yS7Xh80rqNyp3FOWIM3DkagsHlYrJ+C9PW9wV6W6QwRv0x0kXUZGMJAyiT0JTLC9PNFDs+dx57uVMKtbQboFk9osGAem/OJNKKHZYIdIGVM8pMdEhIW9edggKodZnL6ys+lgxxOhBDBUHYzV2PTbXgCkhe+Sq3d+eSfFOEoiL2BIuR7jUjYLw6kVhSKvhWo3Y2GG5FZC+qHPPgUwcGx6nWm3w9gsLmLiBMY0UxRDaTybU7UjEMRp7AAAQ4v0Utipd6Jb+3Qo8U+hbfuCiDi+iV2xHBJzVy9PPD6Onncu3U25Qb7XLWGIb8e9GYDQuheTPquKNF3Od1vE70= Content-Type: text/plain; charset="utf-8" Content-ID: <E856D0075254D94A8153957880C16604@namprd12.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: a561f9d9-1bdf-4981-1cce-08d70573065d X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Jul 2019 20:13:08.4526 (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: sbrijesh@amd.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB3756 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: <kvm.vger.kernel.org> X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP |
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Add AMD SEV guest live migration support
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expand
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diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h index 5ed3cf1c3934..94e91c0bc2e0 100644 --- a/arch/x86/include/asm/kvm_para.h +++ b/arch/x86/include/asm/kvm_para.h @@ -84,6 +84,18 @@ static inline long kvm_hypercall4(unsigned int nr, unsigned long p1, return ret; } +static inline long kvm_sev_hypercall3(unsigned int nr, unsigned long p1, + unsigned long p2, unsigned long p3) +{ + long ret; + + asm volatile("vmmcall" + : "=a"(ret) + : "a"(nr), "b"(p1), "c"(p2), "d"(p3) + : "memory"); + return ret; +} + #ifdef CONFIG_KVM_GUEST bool kvm_para_available(void); unsigned int kvm_arch_para_features(void);
KVM hypercall framework relies on alternative framework to patch the VMCALL -> VMMCALL on AMD platform. If a hypercall is made before apply_alternative() is called then it defaults to VMCALL. The approach works fine on non SEV guest. A VMCALL would causes #UD, and hypervisor will be able to decode the instruction and do the right things. But when SEV is active, guest memory is encrypted with guest key and hypervisor will not be able to decode the instruction bytes. Add SEV specific hypercall3, it unconditionally uses VMMCALL. The hypercall will be used by the SEV guest to notify encrypted pages to the hypervisor. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Borislav Petkov <bp@suse.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: x86@kernel.org Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> --- arch/x86/include/asm/kvm_para.h | 12 ++++++++++++ 1 file changed, 12 insertions(+)