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([172.25.112.68]) by fmviesa004.fm.intel.com with ESMTP; 07 Feb 2024 09:58:58 -0800 From: Xin Li To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: seanjc@google.com, pbonzini@redhat.com, corbet@lwn.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, shuah@kernel.org, vkuznets@redhat.com, peterz@infradead.org, ravi.v.shankar@intel.com, xin@zytor.com Subject: [PATCH v2 19/25] KVM: nVMX: Add FRED VMCS fields Date: Wed, 7 Feb 2024 09:26:39 -0800 Message-ID: <20240207172646.3981-20-xin3.li@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240207172646.3981-1-xin3.li@intel.com> References: <20240207172646.3981-1-xin3.li@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add FRED VMCS fields to nested VMX context management. Todo: change VMCS12_REVISION, as struct vmcs12 is changed. Signed-off-by: Xin Li Tested-by: Shan Kang --- Change since v1: * Remove hyperv TLFS related changes (Jeremi Piotrowski). * Use kvm_cpu_cap_has() instead of cpu_feature_enabled() (Chao Gao). --- Documentation/virt/kvm/x86/nested-vmx.rst | 18 +++++ arch/x86/kvm/vmx/nested.c | 91 +++++++++++++++++++---- arch/x86/kvm/vmx/vmcs12.c | 18 +++++ arch/x86/kvm/vmx/vmcs12.h | 36 +++++++++ arch/x86/kvm/vmx/vmcs_shadow_fields.h | 4 + 5 files changed, 152 insertions(+), 15 deletions(-) diff --git a/Documentation/virt/kvm/x86/nested-vmx.rst b/Documentation/virt/kvm/x86/nested-vmx.rst index e64ef231f310..87fa9f3877ab 100644 --- a/Documentation/virt/kvm/x86/nested-vmx.rst +++ b/Documentation/virt/kvm/x86/nested-vmx.rst @@ -218,6 +218,24 @@ struct shadow_vmcs is ever changed. u16 host_gs_selector; u16 host_tr_selector; u64 secondary_vm_exit_controls; + u64 guest_ia32_fred_config; + u64 guest_ia32_fred_rsp1; + u64 guest_ia32_fred_rsp2; + u64 guest_ia32_fred_rsp3; + u64 guest_ia32_fred_stklvls; + u64 guest_ia32_fred_ssp1; + u64 guest_ia32_fred_ssp2; + u64 guest_ia32_fred_ssp3; + u64 host_ia32_fred_config; + u64 host_ia32_fred_rsp1; + u64 host_ia32_fred_rsp2; + u64 host_ia32_fred_rsp3; + u64 host_ia32_fred_stklvls; + u64 host_ia32_fred_ssp1; + u64 host_ia32_fred_ssp2; + u64 host_ia32_fred_ssp3; + u64 injected_event_data; + u64 original_event_data; }; diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 94da6a0a2f81..f9c1fbeac302 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -686,6 +686,9 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, nested_vmx_set_intercept_for_msr(vmx, msr_bitmap_l1, msr_bitmap_l0, MSR_KERNEL_GS_BASE, MSR_TYPE_RW); + + nested_vmx_set_intercept_for_msr(vmx, msr_bitmap_l1, msr_bitmap_l0, + MSR_IA32_FRED_RSP0, MSR_TYPE_RW); #endif nested_vmx_set_intercept_for_msr(vmx, msr_bitmap_l1, msr_bitmap_l0, MSR_IA32_SPEC_CTRL, MSR_TYPE_RW); @@ -2498,6 +2501,8 @@ static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct loaded_vmcs *vmcs0 vmcs12->vm_entry_instruction_len); vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, vmcs12->guest_interruptibility_info); + if (kvm_cpu_cap_has(X86_FEATURE_FRED)) + vmcs_write64(INJECTED_EVENT_DATA, vmcs12->injected_event_data); vmx->loaded_vmcs->nmi_known_unmasked = !(vmcs12->guest_interruptibility_info & GUEST_INTR_STATE_NMI); } else { @@ -2548,6 +2553,17 @@ static void prepare_vmcs02_rare(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12) vmcs_writel(GUEST_GDTR_BASE, vmcs12->guest_gdtr_base); vmcs_writel(GUEST_IDTR_BASE, vmcs12->guest_idtr_base); + if (kvm_cpu_cap_has(X86_FEATURE_FRED)) { + vmcs_write64(GUEST_IA32_FRED_CONFIG, vmcs12->guest_ia32_fred_config); + vmcs_write64(GUEST_IA32_FRED_RSP1, vmcs12->guest_ia32_fred_rsp1); + vmcs_write64(GUEST_IA32_FRED_RSP2, vmcs12->guest_ia32_fred_rsp2); + vmcs_write64(GUEST_IA32_FRED_RSP3, vmcs12->guest_ia32_fred_rsp3); + vmcs_write64(GUEST_IA32_FRED_STKLVLS, vmcs12->guest_ia32_fred_stklvls); + vmcs_write64(GUEST_IA32_FRED_SSP1, vmcs12->guest_ia32_fred_ssp1); + vmcs_write64(GUEST_IA32_FRED_SSP2, vmcs12->guest_ia32_fred_ssp2); + vmcs_write64(GUEST_IA32_FRED_SSP3, vmcs12->guest_ia32_fred_ssp3); + } + vmx->segment_cache.bitmask = 0; } @@ -3835,6 +3851,22 @@ vmcs12_guest_cr4(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) vcpu->arch.cr4_guest_owned_bits)); } +static inline unsigned long +nested_vmx_get_event_data(struct kvm_vcpu *vcpu, bool for_ex_vmexit) +{ + struct kvm_queued_exception *ex = for_ex_vmexit ? + &vcpu->arch.exception_vmexit : &vcpu->arch.exception; + + if (ex->has_payload) + return ex->payload; + else if (ex->vector == PF_VECTOR) + return vcpu->arch.cr2; + else if (ex->vector == DB_VECTOR) + return (vcpu->arch.dr6 & ~DR6_BT) ^ DR6_ACTIVE_LOW; + else + return 0; +} + static void vmcs12_save_pending_event(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, u32 vm_exit_reason, u32 exit_intr_info) @@ -3842,6 +3874,8 @@ static void vmcs12_save_pending_event(struct kvm_vcpu *vcpu, u32 idt_vectoring; unsigned int nr; + vmcs12->original_event_data = 0; + /* * Per the SDM, VM-Exits due to double and triple faults are never * considered to occur during event delivery, even if the double/triple @@ -3880,6 +3914,12 @@ static void vmcs12_save_pending_event(struct kvm_vcpu *vcpu, vcpu->arch.exception.error_code; } + idt_vectoring |= vcpu->arch.exception.nested ? + INTR_INFO_NESTED_EXCEPTION_MASK : 0; + + vmcs12->original_event_data = + nested_vmx_get_event_data(vcpu, false); + vmcs12->idt_vectoring_info_field = idt_vectoring; } else if (vcpu->arch.nmi_injected) { vmcs12->idt_vectoring_info_field = @@ -3970,19 +4010,7 @@ static void nested_vmx_inject_exception_vmexit(struct kvm_vcpu *vcpu) struct kvm_queued_exception *ex = &vcpu->arch.exception_vmexit; u32 intr_info = ex->vector | INTR_INFO_VALID_MASK; struct vmcs12 *vmcs12 = get_vmcs12(vcpu); - unsigned long exit_qual; - - if (ex->has_payload) { - exit_qual = ex->payload; - } else if (ex->vector == PF_VECTOR) { - exit_qual = vcpu->arch.cr2; - } else if (ex->vector == DB_VECTOR) { - exit_qual = vcpu->arch.dr6; - exit_qual &= ~DR6_BT; - exit_qual ^= DR6_ACTIVE_LOW; - } else { - exit_qual = 0; - } + unsigned long exit_qual = nested_vmx_get_event_data(vcpu, true); /* * Unlike AMD's Paged Real Mode, which reports an error code on #PF @@ -4003,10 +4031,12 @@ static void nested_vmx_inject_exception_vmexit(struct kvm_vcpu *vcpu) intr_info |= INTR_INFO_DELIVER_CODE_MASK; } - if (kvm_exception_is_soft(ex->vector)) + if (kvm_exception_is_soft(ex->vector)) { intr_info |= INTR_TYPE_SOFT_EXCEPTION; - else + } else { intr_info |= INTR_TYPE_HARD_EXCEPTION; + intr_info |= ex->nested ? INTR_INFO_NESTED_EXCEPTION_MASK : 0; + } if (!(vmcs12->idt_vectoring_info_field & VECTORING_INFO_VALID_MASK) && vmx_get_nmi_mask(vcpu)) @@ -4352,6 +4382,14 @@ static bool is_vmcs12_ext_field(unsigned long field) case GUEST_TR_BASE: case GUEST_GDTR_BASE: case GUEST_IDTR_BASE: + case GUEST_IA32_FRED_CONFIG: + case GUEST_IA32_FRED_RSP1: + case GUEST_IA32_FRED_RSP2: + case GUEST_IA32_FRED_RSP3: + case GUEST_IA32_FRED_STKLVLS: + case GUEST_IA32_FRED_SSP1: + case GUEST_IA32_FRED_SSP2: + case GUEST_IA32_FRED_SSP3: case GUEST_PENDING_DBG_EXCEPTIONS: case GUEST_BNDCFGS: return true; @@ -4401,6 +4439,18 @@ static void sync_vmcs02_to_vmcs12_rare(struct kvm_vcpu *vcpu, vmcs12->guest_tr_base = vmcs_readl(GUEST_TR_BASE); vmcs12->guest_gdtr_base = vmcs_readl(GUEST_GDTR_BASE); vmcs12->guest_idtr_base = vmcs_readl(GUEST_IDTR_BASE); + + if (kvm_cpu_cap_has(X86_FEATURE_FRED)) { + vmcs12->guest_ia32_fred_config = vmcs_read64(GUEST_IA32_FRED_CONFIG); + vmcs12->guest_ia32_fred_rsp1 = vmcs_read64(GUEST_IA32_FRED_RSP1); + vmcs12->guest_ia32_fred_rsp2 = vmcs_read64(GUEST_IA32_FRED_RSP2); + vmcs12->guest_ia32_fred_rsp3 = vmcs_read64(GUEST_IA32_FRED_RSP3); + vmcs12->guest_ia32_fred_stklvls = vmcs_read64(GUEST_IA32_FRED_STKLVLS); + vmcs12->guest_ia32_fred_ssp1 = vmcs_read64(GUEST_IA32_FRED_SSP1); + vmcs12->guest_ia32_fred_ssp2 = vmcs_read64(GUEST_IA32_FRED_SSP2); + vmcs12->guest_ia32_fred_ssp3 = vmcs_read64(GUEST_IA32_FRED_SSP3); + } + vmcs12->guest_pending_dbg_exceptions = vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS); @@ -4625,6 +4675,17 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, vmcs_write32(GUEST_IDTR_LIMIT, 0xFFFF); vmcs_write32(GUEST_GDTR_LIMIT, 0xFFFF); + if (kvm_cpu_cap_has(X86_FEATURE_FRED)) { + vmcs_write64(GUEST_IA32_FRED_CONFIG, vmcs12->host_ia32_fred_config); + vmcs_write64(GUEST_IA32_FRED_RSP1, vmcs12->host_ia32_fred_rsp1); + vmcs_write64(GUEST_IA32_FRED_RSP2, vmcs12->host_ia32_fred_rsp2); + vmcs_write64(GUEST_IA32_FRED_RSP3, vmcs12->host_ia32_fred_rsp3); + vmcs_write64(GUEST_IA32_FRED_STKLVLS, vmcs12->host_ia32_fred_stklvls); + vmcs_write64(GUEST_IA32_FRED_SSP1, vmcs12->host_ia32_fred_ssp1); + vmcs_write64(GUEST_IA32_FRED_SSP2, vmcs12->host_ia32_fred_ssp2); + vmcs_write64(GUEST_IA32_FRED_SSP3, vmcs12->host_ia32_fred_ssp3); + } + /* If not VM_EXIT_CLEAR_BNDCFGS, the L2 value propagates to L1. */ if (vmcs12->vm_exit_controls & VM_EXIT_CLEAR_BNDCFGS) vmcs_write64(GUEST_BNDCFGS, 0); diff --git a/arch/x86/kvm/vmx/vmcs12.c b/arch/x86/kvm/vmx/vmcs12.c index 98457d7b2b23..59f17fdfad11 100644 --- a/arch/x86/kvm/vmx/vmcs12.c +++ b/arch/x86/kvm/vmx/vmcs12.c @@ -80,6 +80,7 @@ const unsigned short vmcs12_field_offsets[] = { FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count), FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field), FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE, vm_entry_exception_error_code), + FIELD(INJECTED_EVENT_DATA, injected_event_data), FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len), FIELD(TPR_THRESHOLD, tpr_threshold), FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control), @@ -89,6 +90,7 @@ const unsigned short vmcs12_field_offsets[] = { FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code), FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field), FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code), + FIELD(ORIGINAL_EVENT_DATA, original_event_data), FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len), FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info), FIELD(GUEST_ES_LIMIT, guest_es_limit), @@ -152,5 +154,21 @@ const unsigned short vmcs12_field_offsets[] = { FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip), FIELD(HOST_RSP, host_rsp), FIELD(HOST_RIP, host_rip), + FIELD(GUEST_IA32_FRED_CONFIG, guest_ia32_fred_config), + FIELD(GUEST_IA32_FRED_RSP1, guest_ia32_fred_rsp1), + FIELD(GUEST_IA32_FRED_RSP2, guest_ia32_fred_rsp2), + FIELD(GUEST_IA32_FRED_RSP3, guest_ia32_fred_rsp3), + FIELD(GUEST_IA32_FRED_STKLVLS, guest_ia32_fred_stklvls), + FIELD(GUEST_IA32_FRED_SSP1, guest_ia32_fred_ssp1), + FIELD(GUEST_IA32_FRED_SSP2, guest_ia32_fred_ssp2), + FIELD(GUEST_IA32_FRED_SSP3, guest_ia32_fred_ssp3), + FIELD(HOST_IA32_FRED_CONFIG, host_ia32_fred_config), + FIELD(HOST_IA32_FRED_RSP1, host_ia32_fred_rsp1), + FIELD(HOST_IA32_FRED_RSP2, host_ia32_fred_rsp2), + FIELD(HOST_IA32_FRED_RSP3, host_ia32_fred_rsp3), + FIELD(HOST_IA32_FRED_STKLVLS, host_ia32_fred_stklvls), + FIELD(HOST_IA32_FRED_SSP1, host_ia32_fred_ssp1), + FIELD(HOST_IA32_FRED_SSP2, host_ia32_fred_ssp2), + FIELD(HOST_IA32_FRED_SSP3, host_ia32_fred_ssp3), }; const unsigned int nr_vmcs12_fields = ARRAY_SIZE(vmcs12_field_offsets); diff --git a/arch/x86/kvm/vmx/vmcs12.h b/arch/x86/kvm/vmx/vmcs12.h index f50f897b9b5f..edf7fcef8ccf 100644 --- a/arch/x86/kvm/vmx/vmcs12.h +++ b/arch/x86/kvm/vmx/vmcs12.h @@ -186,6 +186,24 @@ struct __packed vmcs12 { u16 host_tr_selector; u16 guest_pml_index; u64 secondary_vm_exit_controls; + u64 guest_ia32_fred_config; + u64 guest_ia32_fred_rsp1; + u64 guest_ia32_fred_rsp2; + u64 guest_ia32_fred_rsp3; + u64 guest_ia32_fred_stklvls; + u64 guest_ia32_fred_ssp1; + u64 guest_ia32_fred_ssp2; + u64 guest_ia32_fred_ssp3; + u64 host_ia32_fred_config; + u64 host_ia32_fred_rsp1; + u64 host_ia32_fred_rsp2; + u64 host_ia32_fred_rsp3; + u64 host_ia32_fred_stklvls; + u64 host_ia32_fred_ssp1; + u64 host_ia32_fred_ssp2; + u64 host_ia32_fred_ssp3; + u64 injected_event_data; + u64 original_event_data; }; /* @@ -360,6 +378,24 @@ static inline void vmx_check_vmcs12_offsets(void) CHECK_OFFSET(host_tr_selector, 994); CHECK_OFFSET(guest_pml_index, 996); CHECK_OFFSET(secondary_vm_exit_controls, 998); + CHECK_OFFSET(guest_ia32_fred_config, 1006); + CHECK_OFFSET(guest_ia32_fred_rsp1, 1014); + CHECK_OFFSET(guest_ia32_fred_rsp2, 1022); + CHECK_OFFSET(guest_ia32_fred_rsp3, 1030); + CHECK_OFFSET(guest_ia32_fred_stklvls, 1038); + CHECK_OFFSET(guest_ia32_fred_ssp1, 1046); + CHECK_OFFSET(guest_ia32_fred_ssp2, 1054); + CHECK_OFFSET(guest_ia32_fred_ssp3, 1062); + CHECK_OFFSET(host_ia32_fred_config, 1070); + CHECK_OFFSET(host_ia32_fred_rsp1, 1078); + CHECK_OFFSET(host_ia32_fred_rsp2, 1086); + CHECK_OFFSET(host_ia32_fred_rsp3, 1094); + CHECK_OFFSET(host_ia32_fred_stklvls, 1102); + CHECK_OFFSET(host_ia32_fred_ssp1, 1110); + CHECK_OFFSET(host_ia32_fred_ssp2, 1118); + CHECK_OFFSET(host_ia32_fred_ssp3, 1126); + CHECK_OFFSET(injected_event_data, 1134); + CHECK_OFFSET(original_event_data, 1142); } extern const unsigned short vmcs12_field_offsets[]; diff --git a/arch/x86/kvm/vmx/vmcs_shadow_fields.h b/arch/x86/kvm/vmx/vmcs_shadow_fields.h index 7f48056fe351..3885a3e0fbe8 100644 --- a/arch/x86/kvm/vmx/vmcs_shadow_fields.h +++ b/arch/x86/kvm/vmx/vmcs_shadow_fields.h @@ -74,6 +74,10 @@ SHADOW_FIELD_RW(HOST_GS_BASE, host_gs_base, true) /* 64-bit */ SHADOW_FIELD_RO(GUEST_PHYSICAL_ADDRESS, guest_physical_address, true) SHADOW_FIELD_RO(GUEST_PHYSICAL_ADDRESS_HIGH, guest_physical_address, true) +SHADOW_FIELD_RO(ORIGINAL_EVENT_DATA, original_event_data, kvm_cpu_cap_has(X86_FEATURE_FRED)) +SHADOW_FIELD_RO(ORIGINAL_EVENT_DATA_HIGH, original_event_data, kvm_cpu_cap_has(X86_FEATURE_FRED)) +SHADOW_FIELD_RW(INJECTED_EVENT_DATA, injected_event_data, kvm_cpu_cap_has(X86_FEATURE_FRED)) +SHADOW_FIELD_RW(INJECTED_EVENT_DATA_HIGH, injected_event_data, kvm_cpu_cap_has(X86_FEATURE_FRED)) #undef SHADOW_FIELD_RO #undef SHADOW_FIELD_RW