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Thu, 27 Oct 2022 03:41:51 -0500 From: Santosh Shukla To: , CC: , , , , , , , Subject: [PATCHv5 5/8] KVM: SVM: Add VNMI support in inject_nmi Date: Thu, 27 Oct 2022 14:08:28 +0530 Message-ID: <20221027083831.2985-6-santosh.shukla@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221027083831.2985-1-santosh.shukla@amd.com> References: <20221027083831.2985-1-santosh.shukla@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT083:EE_|CH0PR12MB5249:EE_ X-MS-Office365-Filtering-Correlation-Id: 2d101d70-a7d1-4ed2-8b8f-08dab7f71a9e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230022)(4636009)(376002)(346002)(39860400002)(396003)(136003)(451199015)(40470700004)(46966006)(36840700001)(47076005)(110136005)(40480700001)(26005)(426003)(5660300002)(40460700003)(41300700001)(70206006)(54906003)(36756003)(44832011)(316002)(8676002)(8936002)(6666004)(36860700001)(336012)(186003)(2906002)(16526019)(1076003)(4326008)(7696005)(82310400005)(81166007)(2616005)(478600001)(356005)(966005)(86362001)(70586007)(82740400003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Oct 2022 08:41:55.6968 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2d101d70-a7d1-4ed2-8b8f-08dab7f71a9e X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT083.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR12MB5249 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747830690424278177?= X-GMAIL-MSGID: =?utf-8?q?1747830690424278177?= Inject the NMI by setting V_NMI in the VMCB interrupt control. processor will clear V_NMI to acknowledge processing has started and will keep the V_NMI_MASK set until the processor is done with processing the NMI event. Also, handle the nmi_l1_to_l2 case such that when it is true then NMI to be injected originally comes from L1's VMCB12 EVENTINJ field. So adding a check for that case. Signed-off-by: Santosh Shukla --- v4: - Added `nmi_l1_to_l2` check, discussion thread https://lore.kernel.org/all/bf9e8a9c-5172-b61a-be6e-87a919442fbd@maciej.szmigiero.name/ v3: - Removed WARN_ON check. v2: - Added WARN_ON check for vnmi pending. - use `get_vnmi_vmcb` to get correct vmcb so to inject vnmi. arch/x86/kvm/svm/svm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 38fa51e0b70f..cf05a41779f3 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -3478,7 +3478,14 @@ static void pre_svm_run(struct kvm_vcpu *vcpu) static void svm_inject_nmi(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); + struct vmcb *vmcb = NULL; + if (is_vnmi_enabled(svm) && !svm->nmi_l1_to_l2) { + vmcb = get_vnmi_vmcb(svm); + vmcb->control.int_ctl |= V_NMI_PENDING; + ++vcpu->stat.nmi_injections; + return; + } svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI; if (svm->nmi_l1_to_l2)