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Sat, 22 Jul 2023 06:20:50 -0500 From: Nikunj A Dadhania To: , CC: , , , , , , Subject: [PATCH v3 12/14] x86/kvmclock: Skip kvmclock when Secure TSC is available Date: Sat, 22 Jul 2023 16:49:07 +0530 Message-ID: <20230722111909.15166-13-nikunj@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230722111909.15166-1-nikunj@amd.com> References: <20230722111909.15166-1-nikunj@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: DM6NAM11FT098:EE_|DM4PR12MB7645:EE_ X-MS-Office365-Filtering-Correlation-Id: 48bec2ad-b712-46fc-c8d6-08db8aa5b784 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: ahqkD93P1iqWfg/HD94E4ixuvZyvmqXa8prwRYE9zgoXWyuexk5CCZ95sMsbfkiB2+sYJ6QJQDAyI5L5RSmon7xTKGAvwJg6LKlWArKrYlbN3Zo1iR+1YWVizMOqBoqog3FwjUFAoAj6eMxbUXiUOXO2ZS0wDz+GduoDaO/P3aNLm0aO5TvUkVIWEO2KUNlMDNVBRYo6bUWhpCt6yrP0JpW/j0Ez2Ra68wtsvU/OxX/7b0HpIftq8SEJGu8ftFA5dlmvYz2fn3hlK11p5Vj/Co2V3p/7oT1EnEe1Mu5/YtbreC00xnqEf+8AM+cIRVOkGvvANMgPj4sXBBdvUQN3eGjKeuCPKzhdpakogJCMyg59I3l4zS+m+AOTPfEPf+YTZx6fDbyWA3rDuH+suRa9MnhAJ7a9ujX4JZ2UCuf3H3BpTVm1o3Kpm9aQFDiRJFf2tB4y1iJIYWTC0Byz8xjvIfw83LBFmVcOKZPoVI4JO0tg0/qbmwuPwU4FphKSWem5BCgMLv9vd4C+muaDITXtJEYzkLJHP8uBCo9vWrqWRroYWloOfl2cRPERr/oPPtspmX8I5kPbBdc/Zcon+sAvhHA0LkZTpblF3w9H0ET999wYvzacUy64vtnX7NsGRjCc7AotOimTzaPUDxiG9nm9sr8+tOA4fL9OrxQh3XmXCeIlZGEo5EkmddrsoU4tIoXETWPo4ogwOwe3kSSb+1jFVxMjNlsA2TSRMu56A4JyosZMmAAoXo2UPuHvj2uzYZ+ocdv/Bx3JQHI/3I7CB5FECg== 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:(13230028)(4636009)(396003)(39860400002)(346002)(376002)(136003)(82310400008)(451199021)(36840700001)(40470700004)(46966006)(4744005)(47076005)(1076003)(41300700001)(426003)(186003)(336012)(83380400001)(478600001)(26005)(6666004)(40480700001)(2616005)(40460700003)(2906002)(16526019)(7696005)(36756003)(5660300002)(70586007)(70206006)(4326008)(81166007)(356005)(82740400003)(8676002)(8936002)(316002)(36860700001)(110136005)(54906003)(36900700001);DIR:OUT;SFP:1101; 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The guest kernel will fallback and use Secure TSC based clocksource. Signed-off-by: Nikunj A Dadhania --- arch/x86/kernel/kvmclock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index 0f35d44c56fe..1be342064851 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -288,7 +288,7 @@ void __init kvmclock_init(void) { u8 flags; - if (!kvm_para_available() || !kvmclock) + if (!kvm_para_available() || !kvmclock || cc_platform_has(CC_ATTR_GUEST_SECURE_TSC)) return; if (kvm_para_has_feature(KVM_FEATURE_CLOCKSOURCE2)) {