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Peter Anvin" , Ard Biesheuvel , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Andy Lutomirski , Dave Hansen , Sergio Lopez , Peter Gonda , Peter Zijlstra , Srinivas Pandruvada , David Rientjes , tony.luck@intel.com, npmccallum@redhat.com, Borislav Petkov , Brijesh Singh Subject: [PATCH Part2 RFC v3 02/37] KVM: SVM: Provide the Hypervisor Feature support VMGEXIT Date: Wed, 2 Jun 2021 09:10:22 -0500 Message-Id: <20210602141057.27107-3-brijesh.singh@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210602141057.27107-1-brijesh.singh@amd.com> References: <20210602141057.27107-1-brijesh.singh@amd.com> X-Originating-IP: [165.204.77.1] X-ClientProxiedBy: SA0PR11CA0056.namprd11.prod.outlook.com (2603:10b6:806:d0::31) To SN6PR12MB2718.namprd12.prod.outlook.com (2603:10b6:805:6f::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from sbrijesh-desktop.amd.com (165.204.77.1) by SA0PR11CA0056.namprd11.prod.outlook.com (2603:10b6:806:d0::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4195.20 via Frontend Transport; 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dkim=pass header.d=amd.com header.s=selector1 header.b=RQwSnBaD; spf=pass (imf15.hostedemail.com: domain of brijesh.singh@amd.com designates 40.107.95.73 as permitted sender) smtp.mailfrom=brijesh.singh@amd.com; dmarc=pass (policy=quarantine) header.from=amd.com X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 3CB8FA000272 X-Stat-Signature: 57641ut4h7ekf1q3sssey4p4oye4mqfm X-HE-Tag: 1622643088-869796 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Version 2 of the GHCB specification introduced advertisement of features that are supported by the Hypervisor. Now that KVM supports version 2 of the GHCB specification, bump the maximum supported protocol version. Signed-off-by: Brijesh Singh --- arch/x86/include/uapi/asm/svm.h | 2 ++ arch/x86/kvm/svm/sev.c | 14 ++++++++++++++ arch/x86/kvm/svm/svm.h | 3 ++- 3 files changed, 18 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/uapi/asm/svm.h b/arch/x86/include/uapi/asm/svm.h index bd64f2b98ac7..de977dd167ca 100644 --- a/arch/x86/include/uapi/asm/svm.h +++ b/arch/x86/include/uapi/asm/svm.h @@ -114,6 +114,7 @@ #define SVM_VMGEXIT_AP_CREATE_ON_INIT 0 #define SVM_VMGEXIT_AP_CREATE 1 #define SVM_VMGEXIT_AP_DESTROY 2 +#define SVM_VMGEXIT_HV_FT 0x8000fffd #define SVM_VMGEXIT_UNSUPPORTED_EVENT 0x8000ffff #define SVM_EXIT_ERR -1 @@ -224,6 +225,7 @@ { SVM_VMGEXIT_PSC, "vmgexit_page_state_change" }, \ { SVM_VMGEXIT_AP_CREATION, "vmgexit_ap_creation" }, \ { SVM_VMGEXIT_GUEST_REQUEST, "vmgexit_guest_request" }, \ + { SVM_VMGEXIT_HV_FT, "vmgexit_hypervisor_feature" }, \ { SVM_EXIT_ERR, "invalid_guest_state" } diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 7d0b98dbe523..b8505710c36b 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2173,6 +2173,7 @@ static int sev_es_validate_vmgexit(struct vcpu_svm *svm) case SVM_VMGEXIT_AP_HLT_LOOP: case SVM_VMGEXIT_AP_JUMP_TABLE: case SVM_VMGEXIT_UNSUPPORTED_EVENT: + case SVM_VMGEXIT_HV_FT: break; default: goto vmgexit_err; @@ -2427,6 +2428,13 @@ static int sev_handle_vmgexit_msr_protocol(struct vcpu_svm *svm) GHCB_MSR_INFO_MASK, GHCB_MSR_INFO_POS); break; + case GHCB_MSR_HV_FT_REQ: { + set_ghcb_msr_bits(svm, GHCB_HV_FT_SUPPORTED, + GHCB_MSR_HV_FT_MASK, GHCB_MSR_HV_FT_POS); + set_ghcb_msr_bits(svm, GHCB_MSR_HV_FT_RESP, + GHCB_MSR_INFO_MASK, GHCB_MSR_INFO_POS); + break; + } case GHCB_MSR_TERM_REQ: { u64 reason_set, reason_code; @@ -2542,6 +2550,12 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu) ret = 1; break; } + case SVM_VMGEXIT_HV_FT: { + ghcb_set_sw_exit_info_2(ghcb, GHCB_HV_FT_SUPPORTED); + + ret = 1; + break; + } case SVM_VMGEXIT_UNSUPPORTED_EVENT: vcpu_unimpl(vcpu, "vmgexit: unsupported event - exit_info_1=%#llx, exit_info_2=%#llx\n", diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index ad12ca26b2d8..5f874168551b 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -527,9 +527,10 @@ void svm_vcpu_unblocking(struct kvm_vcpu *vcpu); /* sev.c */ -#define GHCB_VERSION_MAX 1ULL +#define GHCB_VERSION_MAX 2ULL #define GHCB_VERSION_MIN 1ULL +#define GHCB_HV_FT_SUPPORTED 0 extern unsigned int max_sev_asid;