[IA64] pvops: introduce pv_info which describes some random info.

introduce pv_info which describes some randome info about
underlying execution environment.

Cc: Jes Sorensen <jes@sgi.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 62 insertions, 0 deletions

diff --git a/include/asm-ia64/paravirt.h b/include/asm-ia64/paravirt.h
new file mode 100644
index 000000000000..26b43342308e
--- /dev/null
+++ b/include/asm-ia64/paravirt.h
@@ -0,0 +1,62 @@
+/******************************************************************************
+ * include/asm-ia64/paravirt.h
+ *
+ * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
+ *                    VA Linux Systems Japan K.K.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+
+#ifndef __ASM_PARAVIRT_H
+#define __ASM_PARAVIRT_H
+
+#ifdef CONFIG_PARAVIRT_GUEST
+
+#ifndef __ASSEMBLY__
+
+#include <asm/hw_irq.h>
+#include <asm/meminit.h>
+
+/******************************************************************************
+ * general info
+ */
+struct pv_info {
+        unsigned int kernel_rpl;
+        int paravirt_enabled;
+        const char *name;
+};
+
+extern struct pv_info pv_info;
+
+static inline int paravirt_enabled(void)
+{
+        return pv_info.paravirt_enabled;
+}
+
+static inline unsigned int get_kernel_rpl(void)
+{
+        return pv_info.kernel_rpl;
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#else
+/* fallback for native case */
+
+#endif /* CONFIG_PARAVIRT_GUEST */
+
+#endif /* __ASM_PARAVIRT_H */