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Shutemov" , Andi Kleen , tony.luck@intel.com, marcorr@google.com, sathyanarayanan.kuppuswamy@linux.intel.com Subject: [PATCH Part2 v5 43/45] KVM: SVM: Use a VMSA physical address variable for populating VMCB Date: Fri, 20 Aug 2021 10:59:16 -0500 Message-Id: <20210820155918.7518-44-brijesh.singh@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210820155918.7518-1-brijesh.singh@amd.com> References: <20210820155918.7518-1-brijesh.singh@amd.com> X-ClientProxiedBy: SN7P222CA0013.NAMP222.PROD.OUTLOOK.COM (2603:10b6:806:124::11) 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 SN7P222CA0013.NAMP222.PROD.OUTLOOK.COM (2603:10b6:806:124::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4436.18 via Frontend Transport; Fri, 20 Aug 2021 16:00:47 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1bde20be-330a-48cb-7b6b-08d963f3ad3c X-MS-TrafficTypeDiagnostic: SA0PR12MB4509: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7219; 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dkim=pass header.d=amd.com header.s=selector1 header.b="EVRX/8qC"; dmarc=pass (policy=quarantine) header.from=amd.com; spf=pass (imf10.hostedemail.com: domain of brijesh.singh@amd.com designates 40.107.237.51 as permitted sender) smtp.mailfrom=brijesh.singh@amd.com X-Stat-Signature: xyzjsmhd9dsft1h1p4p5kq89aatbsper X-Rspamd-Queue-Id: E1B15600198C X-Rspamd-Server: rspam05 X-HE-Tag: 1629475273-165657 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 81ccad412e55..05f795c30816 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -3619,10 +3619,9 @@ 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 3ba62f21b113..be820eb999fb 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1409,9 +1409,16 @@ 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 71fe46a778f3..9bf6404142dd 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -199,6 +199,7 @@ struct vcpu_svm { /* SEV-ES support */ struct sev_es_save_area *vmsa; + hpa_t vmsa_pa; bool ghcb_in_use; bool received_first_sipi; unsigned int ap_reset_hold_type;