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Fri, 15 Sep 2023 15:55:00 -0500 From: Tom Lendacky To: , , CC: Paolo Bonzini , Sean Christopherson , Borislav Petkov , Dave Hansen , Ingo Molnar , "Thomas Gleixner" , Babu Moger Subject: [PATCH v2 2/3] KVM: SVM: Fix TSC_AUX virtualization intercept update logic Date: Fri, 15 Sep 2023 15:54:31 -0500 Message-ID: X-Mailer: git-send-email 2.41.0 In-Reply-To: References: 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: CY4PEPF0000EE33:EE_|LV8PR12MB9181:EE_ X-MS-Office365-Filtering-Correlation-Id: f7798f41-e4e4-4561-576f-08dbb62e07da 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:(13230031)(4636009)(346002)(39860400002)(396003)(136003)(376002)(451199024)(82310400011)(1800799009)(186009)(46966006)(36840700001)(40470700004)(5660300002)(2616005)(8676002)(478600001)(36860700001)(6666004)(40460700003)(47076005)(426003)(83380400001)(16526019)(336012)(26005)(70206006)(54906003)(8936002)(4326008)(70586007)(110136005)(40480700001)(316002)(15650500001)(2906002)(86362001)(41300700001)(36756003)(81166007)(356005)(82740400003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Sep 2023 20:55:01.8463 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f7798f41-e4e4-4561-576f-08dbb62e07da 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: CY4PEPF0000EE33.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV8PR12MB9181 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on groat.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (groat.vger.email [0.0.0.0]); Fri, 15 Sep 2023 13:58:42 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777139483091009382 X-GMAIL-MSGID: 1777163545565850631 With the TSC_AUX virtualization support now in the vcpu_set_after_cpuid() path, the intercepts must be either cleared or set based on the guest CPUID input. Currently the support only clears the intercepts. Also, vcpu_set_after_cpuid() calls svm_recalc_instruction_intercepts() as part of the processing, so the setting or clearing of the RDTSCP intercept can be dropped from the TSC_AUX virtualization support. Update the support to always set or clear the TSC_AUX MSR intercept based on the virtualization requirements. Fixes: 296d5a17e793 ("KVM: SEV-ES: Use V_TSC_AUX if available instead of RDTSC/MSR_TSC_AUX intercepts") Signed-off-by: Tom Lendacky --- arch/x86/kvm/svm/sev.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 4ac01f338903..4900c078045a 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2966,12 +2966,11 @@ static void sev_es_vcpu_after_set_cpuid(struct vcpu_svm *svm) { struct kvm_vcpu *vcpu = &svm->vcpu; - if (boot_cpu_has(X86_FEATURE_V_TSC_AUX) && - (guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP) || - guest_cpuid_has(vcpu, X86_FEATURE_RDPID))) { - set_msr_interception(vcpu, svm->msrpm, MSR_TSC_AUX, 1, 1); - if (guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP)) - svm_clr_intercept(svm, INTERCEPT_RDTSCP); + if (boot_cpu_has(X86_FEATURE_V_TSC_AUX)) { + bool v_tsc_aux = guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP) || + guest_cpuid_has(vcpu, X86_FEATURE_RDPID); + + set_msr_interception(vcpu, svm->msrpm, MSR_TSC_AUX, v_tsc_aux, v_tsc_aux); } }