static int svm_leave_smm(struct kvm_vcpu *vcpu, const char *smstate)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct kvm_host_map map, map_save;
	u64 saved_efer, vmcb12_gpa;
	struct vmcb *vmcb12;
	int ret;

	if (!guest_cpuid_has(vcpu, X86_FEATURE_LM))
		return 0;

	/* Non-zero if SMI arrived while vCPU was in guest mode. */
	if (!GET_SMSTATE(u64, smstate, 0x7ed8))
		return 0;

	if (!guest_cpuid_has(vcpu, X86_FEATURE_SVM))
		return 1;

	saved_efer = GET_SMSTATE(u64, smstate, 0x7ed0);
	if (!(saved_efer & EFER_SVME))
		return 1;

	vmcb12_gpa = GET_SMSTATE(u64, smstate, 0x7ee0);
	if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcb12_gpa), &map) == -EINVAL)
		return 1;

	ret = 1;
	if (kvm_vcpu_map(vcpu, gpa_to_gfn(svm->nested.hsave_msr), &map_save) == -EINVAL)
		goto unmap_map;

	if (svm_allocate_nested(svm))
		goto unmap_save;

	/*
	 * Restore L1 host state from L1 HSAVE area as VMCB01 was
	 * used during SMM (see svm_enter_smm())
	 */

	svm_copy_vmrun_state(&svm->vmcb01.ptr->save, map_save.hva + 0x400);

	/*
	 * Enter the nested guest now
	 */

	vmcb_mark_all_dirty(svm->vmcb01.ptr);

	vmcb12 = map.hva;
	nested_copy_vmcb_control_to_cache(svm, &vmcb12->control);
	nested_copy_vmcb_save_to_cache(svm, &vmcb12->save);
	ret = enter_svm_guest_mode(vcpu, vmcb12_gpa, vmcb12, false);

	if (ret)
		goto unmap_save;

	svm->nested.nested_run_pending = 1;

unmap_save:
	kvm_vcpu_unmap(vcpu, &map_save, true);
unmap_map:
	kvm_vcpu_unmap(vcpu, &map, true);
	return ret;
}
static int svm_leave_smm(struct kvm_vcpu *vcpu, const char *smstate)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct kvm_host_map map, map_save;
	u64 saved_efer, vmcb12_gpa;
	struct vmcb *vmcb12;
	int ret;

	if (!guest_cpuid_has(vcpu, X86_FEATURE_LM))
		return 0;

	 
	if (!GET_SMSTATE(u64, smstate, 0x7ed8))
		return 0;

	if (!guest_cpuid_has(vcpu, X86_FEATURE_SVM))
		return 1;

	saved_efer = GET_SMSTATE(u64, smstate, 0x7ed0);
	if (!(saved_efer & EFER_SVME))
		return 1;

	vmcb12_gpa = GET_SMSTATE(u64, smstate, 0x7ee0);
	if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcb12_gpa), &map) == -EINVAL)
		return 1;

	ret = 1;
	if (kvm_vcpu_map(vcpu, gpa_to_gfn(svm->nested.hsave_msr), &map_save) == -EINVAL)
		goto unmap_map;

	if (svm_allocate_nested(svm))
		goto unmap_save;

	 

	svm_copy_vmrun_state(&svm->vmcb01.ptr->save, map_save.hva + 0x400);

	 

	vmcb_mark_all_dirty(svm->vmcb01.ptr);

	vmcb12 = map.hva;
	nested_copy_vmcb_control_to_cache(svm, &vmcb12->control);
	nested_copy_vmcb_save_to_cache(svm, &vmcb12->save);
	ret = enter_svm_guest_mode(vcpu, vmcb12_gpa, vmcb12, false);

	if (ret)
		goto unmap_save;

	svm->nested.nested_run_pending = 1;

unmap_save:
	kvm_vcpu_unmap(vcpu, &map_save, true);
unmap_map:
	kvm_vcpu_unmap(vcpu, &map, true);
	return ret;
}