[IA64] pvops: preparation: introduce ia64_set_rr0_to_rr4() to make kernel paravirtualization friendly.

make kernel paravirtualization friendly by introducing
ia64_set_rr0_to_rr4().
ia64/Xen will replace setting rr[0-4] with single hypercall later.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/include/asm-ia64/intrinsics.h b/include/asm-ia64/intrinsics.h
index f1135b5b94c3..9b83f8f01678 100644
--- a/include/asm-ia64/intrinsics.h
+++ b/include/asm-ia64/intrinsics.h
@@ -18,6 +18,15 @@
 # include <asm/gcc_intrin.h>
 #endif
 
+#define ia64_set_rr0_to_rr4(val0, val1, val2, val3, val4)       \
+do {                                                            \
+        ia64_set_rr(0x0000000000000000UL, (val0));              \
+        ia64_set_rr(0x2000000000000000UL, (val1));              \
+        ia64_set_rr(0x4000000000000000UL, (val2));              \
+        ia64_set_rr(0x6000000000000000UL, (val3));              \
+        ia64_set_rr(0x8000000000000000UL, (val4));              \
+} while (0)
+
 /*
  * Force an unresolved reference if someone tries to use
  * ia64_fetch_and_add() with a bad value.