static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
			   u32 exit_reason, u32 exit_intr_info,
			   unsigned long exit_qualification)
{
	/* update guest state fields: */
	vmcs12->guest_cr0 = vmcs12_guest_cr0(vcpu, vmcs12);
	vmcs12->guest_cr4 = vmcs12_guest_cr4(vcpu, vmcs12);

	vmcs12->guest_rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
	vmcs12->guest_rip = kvm_register_read(vcpu, VCPU_REGS_RIP);
	vmcs12->guest_rflags = vmcs_readl(GUEST_RFLAGS);

	vmcs12->guest_es_selector = vmcs_read16(GUEST_ES_SELECTOR);
	vmcs12->guest_cs_selector = vmcs_read16(GUEST_CS_SELECTOR);
	vmcs12->guest_ss_selector = vmcs_read16(GUEST_SS_SELECTOR);
	vmcs12->guest_ds_selector = vmcs_read16(GUEST_DS_SELECTOR);
	vmcs12->guest_fs_selector = vmcs_read16(GUEST_FS_SELECTOR);
	vmcs12->guest_gs_selector = vmcs_read16(GUEST_GS_SELECTOR);
	vmcs12->guest_ldtr_selector = vmcs_read16(GUEST_LDTR_SELECTOR);
	vmcs12->guest_tr_selector = vmcs_read16(GUEST_TR_SELECTOR);
	vmcs12->guest_es_limit = vmcs_read32(GUEST_ES_LIMIT);
	vmcs12->guest_cs_limit = vmcs_read32(GUEST_CS_LIMIT);
	vmcs12->guest_ss_limit = vmcs_read32(GUEST_SS_LIMIT);
	vmcs12->guest_ds_limit = vmcs_read32(GUEST_DS_LIMIT);
	vmcs12->guest_fs_limit = vmcs_read32(GUEST_FS_LIMIT);
	vmcs12->guest_gs_limit = vmcs_read32(GUEST_GS_LIMIT);
	vmcs12->guest_ldtr_limit = vmcs_read32(GUEST_LDTR_LIMIT);
	vmcs12->guest_tr_limit = vmcs_read32(GUEST_TR_LIMIT);
	vmcs12->guest_gdtr_limit = vmcs_read32(GUEST_GDTR_LIMIT);
	vmcs12->guest_idtr_limit = vmcs_read32(GUEST_IDTR_LIMIT);
	vmcs12->guest_es_ar_bytes = vmcs_read32(GUEST_ES_AR_BYTES);
	vmcs12->guest_cs_ar_bytes = vmcs_read32(GUEST_CS_AR_BYTES);
	vmcs12->guest_ss_ar_bytes = vmcs_read32(GUEST_SS_AR_BYTES);
	vmcs12->guest_ds_ar_bytes = vmcs_read32(GUEST_DS_AR_BYTES);
	vmcs12->guest_fs_ar_bytes = vmcs_read32(GUEST_FS_AR_BYTES);
	vmcs12->guest_gs_ar_bytes = vmcs_read32(GUEST_GS_AR_BYTES);
	vmcs12->guest_ldtr_ar_bytes = vmcs_read32(GUEST_LDTR_AR_BYTES);
	vmcs12->guest_tr_ar_bytes = vmcs_read32(GUEST_TR_AR_BYTES);
	vmcs12->guest_es_base = vmcs_readl(GUEST_ES_BASE);
	vmcs12->guest_cs_base = vmcs_readl(GUEST_CS_BASE);
	vmcs12->guest_ss_base = vmcs_readl(GUEST_SS_BASE);
	vmcs12->guest_ds_base = vmcs_readl(GUEST_DS_BASE);
	vmcs12->guest_fs_base = vmcs_readl(GUEST_FS_BASE);
	vmcs12->guest_gs_base = vmcs_readl(GUEST_GS_BASE);
	vmcs12->guest_ldtr_base = vmcs_readl(GUEST_LDTR_BASE);
	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);

	vmcs12->guest_interruptibility_info =
		vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
	vmcs12->guest_pending_dbg_exceptions =
		vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS);
	if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
		vmcs12->guest_activity_state = GUEST_ACTIVITY_HLT;
	else
		vmcs12->guest_activity_state = GUEST_ACTIVITY_ACTIVE;

	if (nested_cpu_has_preemption_timer(vmcs12)) {
		if (vmcs12->vm_exit_controls &
		    VM_EXIT_SAVE_VMX_PREEMPTION_TIMER)
			vmcs12->vmx_preemption_timer_value =
				vmx_get_preemption_timer_value(vcpu);
		hrtimer_cancel(&to_vmx(vcpu)->nested.preemption_timer);
	}

	/*
	 * In some cases (usually, nested EPT), L2 is allowed to change its
	 * own CR3 without exiting. If it has changed it, we must keep it.
	 * Of course, if L0 is using shadow page tables, GUEST_CR3 was defined
	 * by L0, not L1 or L2, so we mustn't unconditionally copy it to vmcs12.
	 *
	 * Additionally, restore L2's PDPTR to vmcs12.
	 */
	if (enable_ept) {
		vmcs12->guest_cr3 = vmcs_readl(GUEST_CR3);
		vmcs12->guest_pdptr0 = vmcs_read64(GUEST_PDPTR0);
		vmcs12->guest_pdptr1 = vmcs_read64(GUEST_PDPTR1);
		vmcs12->guest_pdptr2 = vmcs_read64(GUEST_PDPTR2);
		vmcs12->guest_pdptr3 = vmcs_read64(GUEST_PDPTR3);
	}

	if (nested_cpu_has_vid(vmcs12))
		vmcs12->guest_intr_status = vmcs_read16(GUEST_INTR_STATUS);

	vmcs12->vm_entry_controls =
		(vmcs12->vm_entry_controls & ~VM_ENTRY_IA32E_MODE) |
		(vm_entry_controls_get(to_vmx(vcpu)) & VM_ENTRY_IA32E_MODE);

	if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_DEBUG_CONTROLS) {
		kvm_get_dr(vcpu, 7, (unsigned long *)&vmcs12->guest_dr7);
		vmcs12->guest_ia32_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL);
	}

	/* TODO: These cannot have changed unless we have MSR bitmaps and
	 * the relevant bit asks not to trap the change */
	if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_IA32_PAT)
		vmcs12->guest_ia32_pat = vmcs_read64(GUEST_IA32_PAT);
	if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_IA32_EFER)
		vmcs12->guest_ia32_efer = vcpu->arch.efer;
	vmcs12->guest_sysenter_cs = vmcs_read32(GUEST_SYSENTER_CS);
	vmcs12->guest_sysenter_esp = vmcs_readl(GUEST_SYSENTER_ESP);
	vmcs12->guest_sysenter_eip = vmcs_readl(GUEST_SYSENTER_EIP);
	if (kvm_mpx_supported())
		vmcs12->guest_bndcfgs = vmcs_read64(GUEST_BNDCFGS);
	if (nested_cpu_has_xsaves(vmcs12))
		vmcs12->xss_exit_bitmap = vmcs_read64(XSS_EXIT_BITMAP);

	/* update exit information fields: */

	vmcs12->vm_exit_reason = exit_reason;
	vmcs12->exit_qualification = exit_qualification;

	vmcs12->vm_exit_intr_info = exit_intr_info;
	if ((vmcs12->vm_exit_intr_info &
	     (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) ==
	    (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK))
		vmcs12->vm_exit_intr_error_code =
			vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
	vmcs12->idt_vectoring_info_field = 0;
	vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
	vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);

	if (!(vmcs12->vm_exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY)) {
		/* vm_entry_intr_info_field is cleared on exit. Emulate this
		 * instead of reading the real value. */
		vmcs12->vm_entry_intr_info_field &= ~INTR_INFO_VALID_MASK;

		/*
		 * Transfer the event that L0 or L1 may wanted to inject into
		 * L2 to IDT_VECTORING_INFO_FIELD.
		 */
		vmcs12_save_pending_event(vcpu, vmcs12);
	}

	/*
	 * Drop what we picked up for L2 via vmx_complete_interrupts. It is
	 * preserved above and would only end up incorrectly in L1.
	 */
	vcpu->arch.nmi_injected = false;
	kvm_clear_exception_queue(vcpu);
	kvm_clear_interrupt_queue(vcpu);
}