static int handle_io(struct kvm_vcpu *vcpu)
{
	unsigned long exit_qualification;
	int size, in, string;
	unsigned port;

	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
	string = (exit_qualification & 16) != 0;
	in = (exit_qualification & 8) != 0;

	++vcpu->stat.io_exits;

	if (string || in)
		return emulate_instruction(vcpu, 0) == EMULATE_DONE;

	port = exit_qualification >> 16;
	size = (exit_qualification & 7) + 1;
	skip_emulated_instruction(vcpu);

	return kvm_fast_pio_out(vcpu, size, port);
}
Unknown