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s=selector1-amd-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=p/pd/hLJYpa1XzMk9fT2x8xvMuPZix0TDj+IlVUX4r4=; b=ty/fWLcM7sO/fjZbThoUIZ4gENB6c+9f0kF+oxK98wpjHvE0g5106Dh8N5eASGKVCWcpYyD9LDLQTggNrUhvuKNLhbAzqJDNUm4Mvo2Ao+V5OCWnlxxaYPZg2QB5t8QVG4MfWlHJf+n2x/MC/QnsNUoTtmOhCrciMRkPdQEtZNg= Received: from DM6PR12MB2682.namprd12.prod.outlook.com (20.176.116.31) by DM6PR12MB2907.namprd12.prod.outlook.com (20.179.71.213) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1835.12; Wed, 24 Apr 2019 16:10:02 +0000 Received: from DM6PR12MB2682.namprd12.prod.outlook.com ([fe80::9183:846f:a93e:9a43]) by DM6PR12MB2682.namprd12.prod.outlook.com ([fe80::9183:846f:a93e:9a43%5]) with mapi id 15.20.1813.017; Wed, 24 Apr 2019 16:10:02 +0000 From: "Singh, Brijesh" To: "kvm@vger.kernel.org" Thread-Topic: [RFC PATCH v1 03/10] KVM: SVM: Add KVM_SEV_SEND_FINISH command Thread-Index: AQHU+rgsBTgokxjevkCpvGHOaKLVWA== Date: Wed, 24 Apr 2019 16:10:02 +0000 Message-ID: <20190424160942.13567-4-brijesh.singh@amd.com> References: <20190424160942.13567-1-brijesh.singh@amd.com> In-Reply-To: <20190424160942.13567-1-brijesh.singh@amd.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SN4PR0601CA0019.namprd06.prod.outlook.com (2603:10b6:803:2f::29) To DM6PR12MB2682.namprd12.prod.outlook.com (2603:10b6:5:4a::31) authentication-results: spf=none (sender IP is ) smtp.mailfrom=brijesh.singh@amd.com; 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DIR:OUT; SFP:1101; SCL:1; SRVR:DM6PR12MB2907; 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: BIKkIY9oikRrOvddm1UmKYzoOVbPMic2ghADFxW1pKeeIy5neREJ0rK8EE0tFr5PLs3EkhzWxDkzM/Z0ZdV8r9yeJGTnNb2mPijWEgqNanlmLD3R3hdyNNy+0E8W8WEyXydPs1CVjSBJcGCrMMM6MwdOUFywR6zCiMceP8G3m0GGGyO/8ruQYot3CWLpkGl0gjRLqQvh4QljT3ds0tAMVkvBBurwRmGXZ1l1CX+aGY5CUvbx4swYSr9PgCJhdifD+OnSm72TGHWf5y59m45yzFy+TVOx8o5Q4ev1acC0Kfgx/fkBd7hZWVsY0fxnLAciGiNa3B3GHM5TOWBm6YG/yXe7q6A5rNwFwewsN46BbAZsmdOCJgUMryYHhy+Z3XP1lrEEy5p+fyprcTm6J+BBpfZxVpttpRZ1E1DVCA5QuMA= Content-ID: <6E30D6C83E5FE74AAAFBB44FC32F4EC4@namprd12.prod.outlook.com> MIME-Version: 1.0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: d889db59-9568-4c94-ab42-08d6c8cf4eb9 X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Apr 2019 16:10:02.7982 (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-Transport-CrossTenantHeadersStamped: DM6PR12MB2907 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 40.107.78.88 Subject: [Qemu-devel] [RFC PATCH v1 03/10] KVM: SVM: Add KVM_SEV_SEND_FINISH command X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Lendacky, Thomas" , "Singh, Brijesh" , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= , Joerg Roedel , "x86@kernel.org" , "qemu-devel@nongnu.org" , "linux-kernel@vger.kernel.org" , Ingo Molnar , "H. Peter Anvin" , Paolo Bonzini , Thomas Gleixner , Borislav Petkov Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP 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 --- .../virtual/kvm/amd-memory-encryption.rst | 8 +++++++ arch/x86/kvm/svm.c | 23 +++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/Documentation/virtual/kvm/amd-memory-encryption.rst b/Documentation/virtual/kvm/amd-memory-encryption.rst index a0208e171489..006832256ae3 100644 --- a/Documentation/virtual/kvm/amd-memory-encryption.rst +++ b/Documentation/virtual/kvm/amd-memory-encryption.rst @@ -285,6 +285,14 @@ 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 a1cfd36d6195..263f3c7deae7 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -7172,6 +7172,26 @@ 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; @@ -7219,6 +7239,9 @@ 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;