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Tue, 5 May 2020 21:15:21 +0000 From: Ashish Kalra To: pbonzini@redhat.com Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, joro@8bytes.org, bp@suse.de, Thomas.Lendacky@amd.com, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, srutherford@google.com, rientjes@google.com, venu.busireddy@oracle.com, brijesh.singh@amd.com Subject: [PATCH v8 03/18] KVM: SVM: Add KVM_SEV_SEND_FINISH command Date: Tue, 5 May 2020 21:15:11 +0000 Message-Id: <3ad971e9977700140d9092259d5326caab986f1f.1588711355.git.ashish.kalra@amd.com> 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: SN4PR0201CA0055.namprd02.prod.outlook.com (2603:10b6:803:20::17) To DM5PR12MB1386.namprd12.prod.outlook.com (2603:10b6:3:77::9) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from ashkalra_ubuntu_server.amd.com (165.204.77.1) by SN4PR0201CA0055.namprd02.prod.outlook.com (2603:10b6:803:20::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2979.26 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: fa68eb36-42bd-4972-d958-08d7f1396b8c X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 May 2020 21:15:21.8256 (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: 6kpiwRjgQumL0cFrworTVeUYa8Z1JmxDXmKYUhGqP93myx23JrlU8TSZ/eQPQl+RfTu2hs6S0wPGemqJ8idEzg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB2518 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 Reviewed-by: Steve Rutherford Signed-off-by: Brijesh Singh Signed-off-by: Ashish Kalra --- .../virt/kvm/amd-memory-encryption.rst | 8 +++++++ arch/x86/kvm/svm/sev.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 d0dfa5b54e4f..93884ec8918e 100644 --- a/Documentation/virt/kvm/amd-memory-encryption.rst +++ b/Documentation/virt/kvm/amd-memory-encryption.rst @@ -314,6 +314,14 @@ 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/sev.c b/arch/x86/kvm/svm/sev.c index 7031b660f64d..4d3031c9fdcf 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -1153,6 +1153,26 @@ 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; +} + int svm_mem_enc_op(struct kvm *kvm, void __user *argp) { struct kvm_sev_cmd sev_cmd; @@ -1203,6 +1223,9 @@ 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