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Thu, 13 Feb 2020 01:16:21 +0000 From: Ashish Kalra To: pbonzini@redhat.com Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, rkrcmar@redhat.com, joro@8bytes.org, bp@suse.de, thomas.lendacky@amd.com, rientjes@google.com, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 03/12] KVM: SVM: Add KVM_SEV_SEND_FINISH command Date: Thu, 13 Feb 2020 01:16:11 +0000 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: DM6PR03CA0068.namprd03.prod.outlook.com (2603:10b6:5:100::45) To SN1PR12MB2528.namprd12.prod.outlook.com (2603:10b6:802:28::33) MIME-Version: 1.0 Received: from ashkalra_ubuntu_server.amd.com (165.204.77.1) by DM6PR03CA0068.namprd03.prod.outlook.com (2603:10b6:5:100::45) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2729.23 via Frontend Transport; Thu, 13 Feb 2020 01:16:20 +0000 X-Mailer: git-send-email 2.17.1 X-Originating-IP: [165.204.77.1] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 8bc916cd-a590-4558-c71c-08d7b022562c X-MS-TrafficTypeDiagnostic: SN1PR12MB2366:|SN1PR12MB2366: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3826; X-Forefront-PRVS: 031257FE13 X-Forefront-Antispam-Report: SFV:NSPM;SFS:(10009020)(4636009)(346002)(136003)(366004)(376002)(39860400002)(396003)(199004)(189003)(8936002)(5660300002)(66946007)(66476007)(66556008)(7416002)(2906002)(6916009)(6666004)(4326008)(7696005)(52116002)(316002)(36756003)(66574012)(6486002)(86362001)(956004)(2616005)(81156014)(478600001)(8676002)(81166006)(26005)(16526019)(186003);DIR:OUT;SFP:1101;SCL:1;SRVR:SN1PR12MB2366;H:SN1PR12MB2528.namprd12.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; Received-SPF: None (protection.outlook.com: amd.com does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: PbonPrQhB3AI6NAjssE/BKyePT6RiPtooWD0xNHV6F7WO/TekM92CgsGRUM8htG7IvdmpE3Ya/Jt+34uUSZPpPc5/zYGXdvraEoltub/AOEKrqO+4JkgUJ2NSaXH6/dgDlFmk9uANTAgHdie2OtRNTI2u/dCCo+h+h1REvml/m9O3vbyEq/ebHvsbxTsfx+l+Uk1icq/xLxZHR25h35YtXc2FOyDm9fYzwSenUkFXjGmwr1rN2hL7+aF+GAGhGkl+3mpjVVNHHug7P4G+8YILWgAQI0DsjrG6/nmtDuUJvswIjtrGGma692fgIl46fY77UFmfuE3hLlkwidCPWxDfBll8LM7q7aKg6JoxcwSjzsZl0/mNqEyInpU/EGx/3MQs6w4Ve8kza5T/R9tnNyyNXyvpk3dxPfvBlx9xLy3CdCVDSHmmo94fGm6WCrhcTU7 X-MS-Exchange-AntiSpam-MessageData: h3UegRnFAMfbOC0XTkiG24Nvu+76EqxcshPhEQmY8lwcrzoAcmHRRO1iUkIjSAkjqHT4Xu0Vx8uMvE2KKdq99hQIU0iSIjusYJo0aoZJnfGq/qt+Vp/kJY4Uwg54M5cdEKniJ/O3v0KkKjSFR4gJ0w== X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 8bc916cd-a590-4558-c71c-08d7b022562c X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Feb 2020 01:16:21.8675 (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: 7OjgE5PqGeZz2F2UxO0Pg9ty5xfy3Hdw6XRmWOl9LqOW2QbFb5Rw1Lev0RuqFjavUjyQxfP5MGjyvfCqumB+zQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR12MB2366 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Brijesh Singh The command is used to finailize the encryption context created with KVM_SEV_SEND_START command. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Paolo Bonzini Cc: "Radim Krčmář" Cc: Joerg Roedel Cc: Borislav Petkov Cc: Tom Lendacky Cc: x86@kernel.org Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Brijesh Singh Signed-off-by: Ashish Kalra --- .../virt/kvm/amd-memory-encryption.rst | 8 +++++++ arch/x86/kvm/svm.c | 23 +++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/Documentation/virt/kvm/amd-memory-encryption.rst b/Documentation/virt/kvm/amd-memory-encryption.rst index 0f1c3860360f..f22f09ad72bd 100644 --- a/Documentation/virt/kvm/amd-memory-encryption.rst +++ b/Documentation/virt/kvm/amd-memory-encryption.rst @@ -289,6 +289,14 @@ Returns: 0 on success, -negative on error __u32 trans_len; }; +12. KVM_SEV_SEND_FINISH +------------------------ + +After completion of the migration flow, the KVM_SEV_SEND_FINISH command can be +issued by the hypervisor to delete the encryption context. + +Returns: 0 on success, -negative on error + References ========== diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index ae97f774e979..c55c1865f9e0 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -7387,6 +7387,26 @@ static int sev_send_update_data(struct kvm *kvm, struct kvm_sev_cmd *argp) return ret; } +static int sev_send_finish(struct kvm *kvm, struct kvm_sev_cmd *argp) +{ + struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info; + struct sev_data_send_finish *data; + int ret; + + if (!sev_guest(kvm)) + return -ENOTTY; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->handle = sev->handle; + ret = sev_issue_cmd(kvm, SEV_CMD_SEND_FINISH, data, &argp->error); + + kfree(data); + return ret; +} + static int svm_mem_enc_op(struct kvm *kvm, void __user *argp) { struct kvm_sev_cmd sev_cmd; @@ -7434,6 +7454,9 @@ static int svm_mem_enc_op(struct kvm *kvm, void __user *argp) case KVM_SEV_SEND_UPDATE_DATA: r = sev_send_update_data(kvm, &sev_cmd); break; + case KVM_SEV_SEND_FINISH: + r = sev_send_finish(kvm, &sev_cmd); + break; default: r = -EINVAL; goto out; -- 2.17.1