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Mon, 27 Feb 2023 02:44:12 -0600 From: Santosh Shukla To: , CC: , , , , , , , Subject: [PATCHv4 09/11] KVM: SVM: Add VNMI bit definition Date: Mon, 27 Feb 2023 14:10:14 +0530 Message-ID: <20230227084016.3368-10-santosh.shukla@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230227084016.3368-1-santosh.shukla@amd.com> References: <20230227084016.3368-1-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: BN8NAM11FT092:EE_|CY8PR12MB7753:EE_ X-MS-Office365-Filtering-Correlation-Id: ffaabbe0-0f78-4190-8d6c-08db189ecf8e 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:(13230025)(4636009)(136003)(396003)(346002)(376002)(39860400002)(451199018)(40470700004)(36840700001)(46966006)(8936002)(54906003)(16526019)(81166007)(26005)(336012)(36756003)(186003)(316002)(1076003)(356005)(478600001)(40460700003)(7696005)(966005)(44832011)(2906002)(40480700001)(86362001)(2616005)(110136005)(5660300002)(82740400003)(82310400005)(47076005)(426003)(83380400001)(70206006)(70586007)(8676002)(41300700001)(36860700001)(4326008)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Feb 2023 08:44:16.8713 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ffaabbe0-0f78-4190-8d6c-08db189ecf8e 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: BN8NAM11FT092.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7753 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO,SPF_HELO_PASS, SPF_NONE 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?1758974306917095203?= X-GMAIL-MSGID: =?utf-8?q?1758974306917095203?= VNMI exposes 3 capability bits (V_NMI, V_NMI_MASK, and V_NMI_ENABLE) to virtualize NMI and NMI_MASK, Those capability bits are part of VMCB::intr_ctrl - V_NMI_PENDING_MASK(11) - Indicates whether a virtual NMI is pending in the guest. V_NMI_BLOCKING_MASK(12) - Indicates whether virtual NMI is masked in the guest. V_NMI_ENABLE_MASK(26) - Enables the NMI virtualization feature for the guest. When Hypervisor wants to inject NMI, it will set V_NMI bit, Processor will clear the V_NMI bit and Set the V_NMI_MASK which means the Guest is handling NMI, After the guest handled the NMI, The processor will clear the V_NMI_MASK on the successful completion of IRET instruction Or if VMEXIT occurs while delivering the virtual NMI. To enable the VNMI capability, Hypervisor need to program V_NMI_ENABLE_MASK bit 1. Reviewed-by: Maxim Levitsky Signed-off-by: Santosh Shukla --- v3: - Renamed V_NMI bits per Sean's v2 comment for better readability. https://lore.kernel.org/all/66f93354-22b1-a2aa-f64c-6e70b9b8063c@amd.com/ arch/x86/include/asm/svm.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index cb1ee53ad3b1..9691081d9231 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -183,6 +183,12 @@ struct __attribute__ ((__packed__)) vmcb_control_area { #define V_GIF_SHIFT 9 #define V_GIF_MASK (1 << V_GIF_SHIFT) +#define V_NMI_PENDING_SHIFT 11 +#define V_NMI_PENDING_MASK (1 << V_NMI_PENDING_SHIFT) + +#define V_NMI_BLOCKING_SHIFT 12 +#define V_NMI_BLOCKING_MASK (1 << V_NMI_BLOCKING_SHIFT) + #define V_INTR_PRIO_SHIFT 16 #define V_INTR_PRIO_MASK (0x0f << V_INTR_PRIO_SHIFT) @@ -197,6 +203,9 @@ struct __attribute__ ((__packed__)) vmcb_control_area { #define V_GIF_ENABLE_SHIFT 25 #define V_GIF_ENABLE_MASK (1 << V_GIF_ENABLE_SHIFT) +#define V_NMI_ENABLE_SHIFT 26 +#define V_NMI_ENABLE_MASK (1 << V_NMI_ENABLE_SHIFT) + #define AVIC_ENABLE_SHIFT 31 #define AVIC_ENABLE_MASK (1 << AVIC_ENABLE_SHIFT)