X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;ds=sidebyside;f=virt-what-ia64-xen-rdtsc-test.c;fp=virt-what-ia64-xen-rdtsc-test.c;h=75c8ae3ce4ebbb7bd6aa9fa0645697a047cc6a39;hb=3ea952163f0c28cd88f8473bb015df892c4247bf;hp=0000000000000000000000000000000000000000;hpb=4fbbc8153ab74d5448bbb6d1113f1bc39f55402a;p=virt-what.git

diff --git a/virt-what-ia64-xen-rdtsc-test.c b/virt-what-ia64-xen-rdtsc-test.c
new file mode 100644
index 0000000..75c8ae3
--- /dev/null
+++ b/virt-what-ia64-xen-rdtsc-test.c
@@ -0,0 +1,58 @@
+/* virt-what-ia64-xen-rdtsc-test
+ * Copyright (C) 2011 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __ia64__
+#error "error in Makefile - this program should only be compiled for ia64 host"
+#endif
+
+/* This program is ugly, but possibly the only way to detect
+ * virtualized Xen HVM guests on IA64.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static inline unsigned long
+rdtsc (void)
+{
+  unsigned long res;
+  asm volatile ("mov %0=ar.itc" : "=r"(res));
+  return res;
+}
+
+int
+main ()
+{
+  unsigned long old, new;
+  int virt;
+  int i;
+
+  virt = 1;
+
+  for (i = 16; i--; ) {
+    old = rdtsc (); new = rdtsc ();
+    /*printf("%ld\n", new - old);*/
+    if (new - old < 30) {
+      virt = 0;
+      break;
+    }
+  }
+
+  exit (virt);
+}