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Mon, 27 Feb 2023 08:42:45 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CO1NAM11FT100.mail.protection.outlook.com (10.13.175.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6156.16 via Frontend Transport; Mon, 27 Feb 2023 08:42:45 +0000 Received: from BLR-L-SASHUKLA.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Mon, 27 Feb 2023 02:42:40 -0600 From: Santosh Shukla To: , CC: , , , , , , , Subject: [PATCHv4 05/11] KVM: x86: Raise an event request when processing NMIs if an NMI is pending Date: Mon, 27 Feb 2023 14:10:10 +0530 Message-ID: <20230227084016.3368-6-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: CO1NAM11FT100:EE_|DS7PR12MB8231:EE_ X-MS-Office365-Filtering-Correlation-Id: 7b09f0c0-15ae-4f02-44c1-08db189e98db X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Feb 2023 08:42:45.0057 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7b09f0c0-15ae-4f02-44c1-08db189e98db 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: CO1NAM11FT100.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB8231 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Sean Christopherson Don't raise KVM_REQ_EVENT if no NMIs are pending at the end of process_nmi(). Finishing process_nmi() without a pending NMI will become much more likely when KVM gains support for AMD's vNMI, which allows pending vNMIs in hardware, i.e. doesn't require explicit injection. Signed-off-by: Sean Christopherson Signed-off-by: Santosh Shukla --- arch/x86/kvm/x86.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index f706621c35b8..1cd9cadc82af 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -10148,7 +10148,9 @@ static void process_nmi(struct kvm_vcpu *vcpu) vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); - kvm_make_request(KVM_REQ_EVENT, vcpu); + + if (vcpu->arch.nmi_pending) + kvm_make_request(KVM_REQ_EVENT, vcpu); } void kvm_make_scan_ioapic_request_mask(struct kvm *kvm,