1 /* virt-what-ia64-xen-rdtsc-test
2 * Copyright (C) 2011 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #error "error in Makefile - this program should only be compiled for ia64 host"
23 /* This program is ugly, but possibly the only way to detect
24 * virtualized Xen HVM guests on IA64.
31 static inline unsigned long
35 asm volatile ("mov %0=ar.itc" : "=r"(res));
42 unsigned long old, new;
49 old = rdtsc (); new = rdtsc ();
50 /*printf("%ld\n", new - old);*/