static int apic_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
			   gpa_t address, int len, void *data)
{
	struct kvm_lapic *apic = to_lapic(this);
	u32 offset = address - apic->base_address;

	if (!apic_mmio_in_range(apic, address))
		return -EOPNOTSUPP;

	if (!kvm_apic_hw_enabled(apic) || apic_x2apic_mode(apic)) {
		if (!kvm_check_has_quirk(vcpu->kvm,
					 KVM_X86_QUIRK_LAPIC_MMIO_HOLE))
			return -EOPNOTSUPP;

		memset(data, 0xff, len);
		return 0;
	}

	kvm_lapic_reg_read(apic, offset, len, data);

	return 0;
}
static int apic_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
			   gpa_t address, int len, void *data)
{
	struct kvm_lapic *apic = to_lapic(this);
	u32 offset = address - apic->base_address;

	if (!apic_mmio_in_range(apic, address))
		return -EOPNOTSUPP;

	if (!kvm_apic_hw_enabled(apic) || apic_x2apic_mode(apic)) {
		if (!kvm_check_has_quirk(vcpu->kvm,
					 KVM_X86_QUIRK_LAPIC_MMIO_HOLE))
			return -EOPNOTSUPP;

		memset(data, 0xff, len);
		return 0;
	}

	kvm_lapic_reg_read(apic, offset, len, data);

	return 0;
}