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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 Subject: [PATCH Part2 RFC v3 36/37] KVM: SVM: Use a VMSA physical address variable for populating VMCB Date: Wed, 2 Jun 2021 09:10:56 -0500 Message-Id: <20210602141057.27107-37-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=YdP0bwDJ; dmarc=pass (policy=quarantine) header.from=amd.com; spf=pass (imf11.hostedemail.com: domain of brijesh.singh@amd.com designates 40.107.95.87 as permitted sender) smtp.mailfrom=brijesh.singh@amd.com X-Stat-Signature: ks3smzhxpyuftskd64dpcsgzffufb7aq X-Rspamd-Queue-Id: 0F3C820010A1 X-Rspamd-Server: rspam02 X-HE-Tag: 1622643146-991390 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: From: Tom Lendacky In preparation to support SEV-SNP AP Creation, use a variable that holds the VMSA physical address rather than converting the virtual address. This will allow SEV-SNP AP Creation to set the new physical address that will be used should the vCPU reset path be taken. Signed-off-by: Tom Lendacky --- arch/x86/kvm/svm/sev.c | 5 ++--- arch/x86/kvm/svm/svm.c | 9 ++++++++- arch/x86/kvm/svm/svm.h | 1 + 3 files changed, 11 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 5718e2e07788..047f4dbde99b 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -3409,10 +3409,9 @@ void sev_es_init_vmcb(struct vcpu_svm *svm) /* * An SEV-ES guest requires a VMSA area that is a separate from the - * VMCB page. Do not include the encryption mask on the VMSA physical - * address since hardware will access it using the guest key. + * VMCB page. */ - svm->vmcb->control.vmsa_pa = __pa(svm->vmsa); + svm->vmcb->control.vmsa_pa = svm->vmsa_pa; /* Can't intercept CR register access, HV can't modify CR registers */ svm_clr_intercept(svm, INTERCEPT_CR0_READ); diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 32e35d396508..74bc635c9608 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1379,9 +1379,16 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu) svm->vmcb01.ptr = page_address(vmcb01_page); svm->vmcb01.pa = __sme_set(page_to_pfn(vmcb01_page) << PAGE_SHIFT); - if (vmsa_page) + if (vmsa_page) { svm->vmsa = page_address(vmsa_page); + /* + * Do not include the encryption mask on the VMSA physical + * address since hardware will access it using the guest key. + */ + svm->vmsa_pa = __pa(svm->vmsa); + } + svm->guest_state_loaded = false; svm_switch_vmcb(svm, &svm->vmcb01); diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index d4efcda3070d..52fd3cf30ad9 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -176,6 +176,7 @@ struct vcpu_svm { /* SEV-ES support */ struct sev_es_save_area *vmsa; + hpa_t vmsa_pa; struct ghcb *ghcb; struct kvm_host_map ghcb_map; bool received_first_sipi;