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Mon, 30 Mar 2020 06:21:45 +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, rientjes@google.com, srutherford@google.com, luto@kernel.org, brijesh.singh@amd.com Subject: [PATCH v6 06/14] KVM: SVM: Add KVM_SEV_RECEIVE_FINISH command Date: Mon, 30 Mar 2020 06:21:36 +0000 Message-Id: <0f8a2125c7acb7b38fc51a044a8088e8baa45e3d.1585548051.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: DM5PR19CA0036.namprd19.prod.outlook.com (2603:10b6:3:9a::22) 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 DM5PR19CA0036.namprd19.prod.outlook.com (2603:10b6:3:9a::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2856.20 via Frontend Transport; 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X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: l3yIuSFmbRj+ArExEuqR4bV15lEhuyL+FwYNq1wx4MiSyCtgvM0Uzx8HZ9Z2bp0E6dnPuAcK1lvQ7bzQwNqXM3Nb0arKHyMNCz0LMtKgsC2f42IKSeqF7c8+VUHxofJLj1YBIeDRkZabpNIzr19T6A== X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0c2c79b0-e23c-4c1d-cbd7-08d7d4729f0c X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Mar 2020 06:21:45.7270 (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: 95aQZGKxoH2XArSgoKyA85vOOtpDwUYREWYAXzttInQhvvBErcHaa3Tcx1IzxUuRTpFeWLDIyXAv9rgQv0abig== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB1692 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Brijesh Singh The command finalize the guest receiving process and make the SEV guest ready for the execution. 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 554aa33a99cc..93cd95d9a6c0 100644 --- a/Documentation/virt/kvm/amd-memory-encryption.rst +++ b/Documentation/virt/kvm/amd-memory-encryption.rst @@ -375,6 +375,14 @@ Returns: 0 on success, -negative on error __u32 trans_len; }; +15. KVM_SEV_RECEIVE_FINISH +------------------------ + +After completion of the migration flow, the KVM_SEV_RECEIVE_FINISH command can be +issued by the hypervisor to make the guest ready for execution. + +Returns: 0 on success, -negative on error + References ========== diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 5fc5355536d7..7c2721e18b06 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -7573,6 +7573,26 @@ static int sev_receive_update_data(struct kvm *kvm, struct kvm_sev_cmd *argp) return ret; } +static int sev_receive_finish(struct kvm *kvm, struct kvm_sev_cmd *argp) +{ + struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info; + struct sev_data_receive_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_RECEIVE_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; @@ -7632,6 +7652,9 @@ static int svm_mem_enc_op(struct kvm *kvm, void __user *argp) case KVM_SEV_RECEIVE_UPDATE_DATA: r = sev_receive_update_data(kvm, &sev_cmd); break; + case KVM_SEV_RECEIVE_FINISH: + r = sev_receive_finish(kvm, &sev_cmd); + break; default: r = -EINVAL; goto out; -- 2.17.1