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Mon, 30 Mar 2020 06:20:58 +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 03/14] KVM: SVM: Add KVM_SEV_SEND_FINISH command Date: Mon, 30 Mar 2020 06:20:49 +0000 Message-Id: <798316bc964cef34d2760a87de0fb6dc4e5d9af3.1585548051.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: SN6PR16CA0069.namprd16.prod.outlook.com (2603:10b6:805:ca::46) 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 SN6PR16CA0069.namprd16.prod.outlook.com (2603:10b6:805:ca::46) 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: LSlTsPADdwJb3wWBn26g6lWUSsr4N3F1SDE2/hkWisPrBC+Wk/xutR5SbNOoZAFR0DFvFWmjfchIWaxez99cBNe37NnQAoFWf9y0f0I0rf+83XOtmpRdtxSV3MZ/p6Lhwc+gZPUQ/uJDPPWidBr4+Q== X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0e1f9c27-610c-4e6b-bc76-08d7d47282f2 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Mar 2020 06:20:58.5940 (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: gfdAZ+tFyQO+EpzarOIIQeN3ZifB0fT7/ynOxaco6FSITftzzAzEFByWgVsA+wYkhzwoVimq3pE5InbgxCMDKA== 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 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.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 f46817ef7019..a45dcb5f8687 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.c b/arch/x86/kvm/svm.c index 8561c47cc4f9..71a4cb3b817d 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -7399,6 +7399,26 @@ 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; @@ -7449,6 +7469,9 @@ 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