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Wed, 24 May 2023 10:54:32 -0500 From: John Allen To: CC: , , , , , , , , John Allen Subject: [RFC PATCH v2 3/6] KVM: x86: SVM: Pass through shadow stack MSRs Date: Wed, 24 May 2023 15:53:36 +0000 Message-ID: <20230524155339.415820-4-john.allen@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230524155339.415820-1-john.allen@amd.com> References: <20230524155339.415820-1-john.allen@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT062:EE_|DS7PR12MB6045:EE_ X-MS-Office365-Filtering-Correlation-Id: fe640d0f-8462-4d4a-7fee-08db5c6f2aec 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:(13230028)(4636009)(346002)(376002)(136003)(396003)(39860400002)(451199021)(46966006)(40470700004)(36840700001)(40460700003)(41300700001)(7696005)(83380400001)(47076005)(426003)(336012)(36860700001)(16526019)(186003)(2906002)(26005)(82310400005)(86362001)(2616005)(1076003)(82740400003)(356005)(81166007)(40480700001)(44832011)(5660300002)(36756003)(8676002)(8936002)(6916009)(70586007)(70206006)(4326008)(54906003)(478600001)(316002)(36900700001);DIR:OUT;SFP:1101; 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Signed-off-by: John Allen --- arch/x86/kvm/svm/svm.c | 17 +++++++++++++++++ arch/x86/kvm/svm/svm.h | 2 +- 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 6df486bb1ac4..cdbce20989b8 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -136,6 +136,13 @@ static const struct svm_direct_access_msrs { { .index = X2APIC_MSR(APIC_TMICT), .always = false }, { .index = X2APIC_MSR(APIC_TMCCT), .always = false }, { .index = X2APIC_MSR(APIC_TDCR), .always = false }, + { .index = MSR_IA32_U_CET, .always = false }, + { .index = MSR_IA32_S_CET, .always = false }, + { .index = MSR_IA32_INT_SSP_TAB, .always = false }, + { .index = MSR_IA32_PL0_SSP, .always = false }, + { .index = MSR_IA32_PL1_SSP, .always = false }, + { .index = MSR_IA32_PL2_SSP, .always = false }, + { .index = MSR_IA32_PL3_SSP, .always = false }, { .index = MSR_INVALID, .always = false }, }; @@ -1181,6 +1188,16 @@ static inline void init_vmcb_after_set_cpuid(struct kvm_vcpu *vcpu) set_msr_interception(vcpu, svm->msrpm, MSR_IA32_SYSENTER_EIP, 1, 1); set_msr_interception(vcpu, svm->msrpm, MSR_IA32_SYSENTER_ESP, 1, 1); } + + if (kvm_cet_user_supported() && guest_cpuid_has(vcpu, X86_FEATURE_SHSTK)) { + set_msr_interception(vcpu, svm->msrpm, MSR_IA32_U_CET, 1, 1); + set_msr_interception(vcpu, svm->msrpm, MSR_IA32_S_CET, 1, 1); + set_msr_interception(vcpu, svm->msrpm, MSR_IA32_INT_SSP_TAB, 1, 1); + set_msr_interception(vcpu, svm->msrpm, MSR_IA32_PL0_SSP, 1, 1); + set_msr_interception(vcpu, svm->msrpm, MSR_IA32_PL1_SSP, 1, 1); + set_msr_interception(vcpu, svm->msrpm, MSR_IA32_PL2_SSP, 1, 1); + set_msr_interception(vcpu, svm->msrpm, MSR_IA32_PL3_SSP, 1, 1); + } } static void init_vmcb(struct kvm_vcpu *vcpu) diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index f44751dd8d5d..dad977747a15 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -29,7 +29,7 @@ #define IOPM_SIZE PAGE_SIZE * 3 #define MSRPM_SIZE PAGE_SIZE * 2 -#define MAX_DIRECT_ACCESS_MSRS 46 +#define MAX_DIRECT_ACCESS_MSRS 53 #define MSRPM_OFFSETS 32 extern u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly; extern bool npt_enabled;