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<hpa@zytor.com>, + <ardb@kernel.org>, <pbonzini@redhat.com>, <seanjc@google.com>, + <vkuznets@redhat.com>, <jmattson@google.com>, <luto@kernel.org>, + <dave.hansen@linux.intel.com>, <slp@redhat.com>, <pgonda@google.com>, + <peterz@infradead.org>, <srinivas.pandruvada@linux.intel.com>, + <rientjes@google.com>, <dovmurik@linux.ibm.com>, <tobin@ibm.com>, + <bp@alien8.de>, <vbabka@suse.cz>, <kirill@shutemov.name>, + <ak@linux.intel.com>, <tony.luck@intel.com>, + <sathyanarayanan.kuppuswamy@linux.intel.com>, <alpergun@google.com>, + <jarkko@kernel.org>, <ashish.kalra@amd.com>, <nikunj.dadhania@amd.com>, + <pankaj.gupta@amd.com>, <liam.merwick@oracle.com> +Subject: [PATCH v12 18/29] KVM: SEV: Use a VMSA physical address variable for populating VMCB +Date: Fri, 29 Mar 2024 17:58:24 -0500 +Message-ID: <20240329225835.400662-19-michael.roth@amd.com> +X-Mailer: git-send-email 2.25.1 +In-Reply-To: <20240329225835.400662-1-michael.roth@amd.com> +References: 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23:03:09.2428 + (UTC) +X-MS-Exchange-Organization-Network-Message-Id: 4c787faf-8036-465c-8fb4-08dc504466cc +X-MS-Exchange-Organization-OriginalClientIPAddress: 62.96.220.36 +X-MS-Exchange-Organization-OriginalServerIPAddress: 10.53.40.201 +X-MS-Exchange-Organization-Cross-Premises-Headers-Processed: cas-essen-01.secunet.de +X-MS-Exchange-Organization-OrderedPrecisionLatencyInProgress: LSRV=cas-essen-01.secunet.de:TOTAL-FE=0.008|SMR=0.008(SMRPI=0.006(SMRPI-FrontendProxyAgent=0.006));2024-03-29T23:03:09.251Z +X-MS-Exchange-Forest-ArrivalHubServer: mbx-essen-02.secunet.de +X-MS-Exchange-Organization-AuthSource: cas-essen-01.secunet.de +X-MS-Exchange-Organization-AuthAs: Anonymous +X-MS-Exchange-Organization-OriginalSize: 14189 +X-MS-Exchange-Organization-Transport-Properties: DeliveryPriority=Low +X-MS-Exchange-Organization-Prioritization: 2:ShadowRedundancy +X-MS-Exchange-Organization-IncludeInSla: False:ShadowRedundancy + +From: Tom Lendacky <thomas.lendacky@amd.com> + +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 <thomas.lendacky@amd.com> +Signed-off-by: Ashish Kalra <ashish.kalra@amd.com> +Signed-off-by: Michael Roth <michael.roth@amd.com> +--- + arch/x86/kvm/svm/sev.c | 3 +-- + arch/x86/kvm/svm/svm.c | 9 ++++++++- + arch/x86/kvm/svm/svm.h | 1 + + 3 files changed, 10 insertions(+), 3 deletions(-) + +diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c +index a0a88471f9ab..ce1c727bad23 100644 +--- a/arch/x86/kvm/svm/sev.c ++++ b/arch/x86/kvm/svm/sev.c +@@ -3780,8 +3780,7 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm) + * the VMSA will be NULL if this vCPU is the destination for intrahost + * migration, and will be copied later. + */ +- if (svm->sev_es.vmsa) +- svm->vmcb->control.vmsa_pa = __pa(svm->sev_es.vmsa); ++ svm->vmcb->control.vmsa_pa = svm->sev_es.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 648a05ca53fc..e036a8927717 100644 +--- a/arch/x86/kvm/svm/svm.c ++++ b/arch/x86/kvm/svm/svm.c +@@ -1451,9 +1451,16 @@ static int svm_vcpu_create(struct kvm_vcpu *vcpu) + svm->vmcb01.pa = __sme_set(page_to_pfn(vmcb01_page) << PAGE_SHIFT); + svm_switch_vmcb(svm, &svm->vmcb01); + +- if (vmsa_page) ++ if (vmsa_page) { + svm->sev_es.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->sev_es.vmsa_pa = __pa(svm->sev_es.vmsa); ++ } ++ + svm->guest_state_loaded = false; + + return 0; +diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h +index c0675ff2d8a2..8cce3315b46c 100644 +--- a/arch/x86/kvm/svm/svm.h ++++ b/arch/x86/kvm/svm/svm.h +@@ -199,6 +199,7 @@ struct vcpu_sev_es_state { + struct ghcb *ghcb; + u8 valid_bitmap[16]; + struct kvm_host_map ghcb_map; ++ hpa_t vmsa_pa; + bool received_first_sipi; + unsigned int ap_reset_hold_type; + +-- +2.25.1 diff --git a/a/content_digest b/N1/content_digest index ed13f31..4f0a101 100644 --- a/a/content_digest +++ b/N1/content_digest @@ -106,6 +106,247 @@ " \tunsigned int ap_reset_hold_type;\n" " \n" "-- \n" + "2.25.1\n" + "\n" + "\n" + "X-sender: <linux-kernel+bounces-125498-steffen.klassert=secunet.com@vger.kernel.org>\n" + "X-Receiver: <steffen.klassert@secunet.com> ORCPT=rfc822;steffen.klassert@secunet.com\n" + "X-CreatedBy: MSExchange15\n" + "X-HeloDomain: mbx-dresden-01.secunet.de\n" + "X-ExtendedProps: 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"X-MS-Exchange-Organization-IncludeInSla: False:ShadowRedundancy\n" + "\n" + "From: Tom Lendacky <thomas.lendacky@amd.com>\n" + "\n" + "In preparation to support SEV-SNP AP Creation, use a variable that holds\n" + "the VMSA physical address rather than converting the virtual address.\n" + "This will allow SEV-SNP AP Creation to set the new physical address that\n" + "will be used should the vCPU reset path be taken.\n" + "\n" + "Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>\n" + "Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>\n" + "Signed-off-by: Michael Roth <michael.roth@amd.com>\n" + "---\n" + " arch/x86/kvm/svm/sev.c | 3 +--\n" + " arch/x86/kvm/svm/svm.c | 9 ++++++++-\n" + " arch/x86/kvm/svm/svm.h | 1 +\n" + " 3 files changed, 10 insertions(+), 3 deletions(-)\n" + "\n" + "diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c\n" + "index a0a88471f9ab..ce1c727bad23 100644\n" + "--- a/arch/x86/kvm/svm/sev.c\n" + "+++ b/arch/x86/kvm/svm/sev.c\n" + "@@ -3780,8 +3780,7 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm)\n" + " \t * the VMSA will be NULL if this vCPU is the destination for intrahost\n" + " \t * migration, and will be copied later.\n" + " \t */\n" + "-\tif (svm->sev_es.vmsa)\n" + "-\t\tsvm->vmcb->control.vmsa_pa = __pa(svm->sev_es.vmsa);\n" + "+\tsvm->vmcb->control.vmsa_pa = svm->sev_es.vmsa_pa;\n" + " \n" + " \t/* Can't intercept CR register access, HV can't modify CR registers */\n" + " \tsvm_clr_intercept(svm, INTERCEPT_CR0_READ);\n" + "diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c\n" + "index 648a05ca53fc..e036a8927717 100644\n" + "--- a/arch/x86/kvm/svm/svm.c\n" + "+++ b/arch/x86/kvm/svm/svm.c\n" + "@@ -1451,9 +1451,16 @@ static int svm_vcpu_create(struct kvm_vcpu *vcpu)\n" + " \tsvm->vmcb01.pa = __sme_set(page_to_pfn(vmcb01_page) << PAGE_SHIFT);\n" + " \tsvm_switch_vmcb(svm, &svm->vmcb01);\n" + " \n" + "-\tif (vmsa_page)\n" + "+\tif (vmsa_page) {\n" + " \t\tsvm->sev_es.vmsa = page_address(vmsa_page);\n" + " \n" + "+\t\t/*\n" + "+\t\t * Do not include the encryption mask on the VMSA physical\n" + "+\t\t * address since hardware will access it using the guest key.\n" + "+\t\t */\n" + "+\t\tsvm->sev_es.vmsa_pa = __pa(svm->sev_es.vmsa);\n" + "+\t}\n" + "+\n" + " \tsvm->guest_state_loaded = false;\n" + " \n" + " \treturn 0;\n" + "diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h\n" + "index c0675ff2d8a2..8cce3315b46c 100644\n" + "--- a/arch/x86/kvm/svm/svm.h\n" + "+++ b/arch/x86/kvm/svm/svm.h\n" + "@@ -199,6 +199,7 @@ struct vcpu_sev_es_state {\n" + " \tstruct ghcb *ghcb;\n" + " \tu8 valid_bitmap[16];\n" + " \tstruct kvm_host_map ghcb_map;\n" + "+\thpa_t vmsa_pa;\n" + " \tbool received_first_sipi;\n" + " \tunsigned int ap_reset_hold_type;\n" + " \n" + "-- \n" 2.25.1 -8e126f4e0069adfaeaf48c974f9a818e06b3f3808f8fb2138590b746df817149 +0c584c81d0faee15317dc6588adc0544eb7ed23d3921c35f31ce3d3afa753ae2
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