/* reads and returns guest's timestamp counter "register" guest_tsc = host_tsc + tsc_offset  */
static u64 guest_read_tsc(void)
/* reads and returns guest's timestamp counter "register" guest_tsc = host_tsc + tsc_offset  */
static u64 guest_read_tsc(void)
{
	u64 host_tsc, tsc_offset;
	rdtscll(host_tsc);
	tsc_offset = vmcs_read64(TSC_OFFSET);
	return host_tsc + tsc_offset;
}