[Xen-ia64-devel] [PATCH 02/15] ia64/pv_ops: preparation: introduce ia64_set_rr0_to_rr4() to make kernel paravirtualization friendly.

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

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@xxxxxxxxxxxxx>
---
 include/asm-ia64/intrinsics.h  |   10 ++++++++++
 include/asm-ia64/mmu_context.h |    6 +-----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/include/asm-ia64/intrinsics.h b/include/asm-ia64/intrinsics.h
index f1135b5..72f0383 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.
@@ -183,4 +192,5 @@ extern long ia64_cmpxchg_called_with_bad_pointer (void);
 #endif /* !CONFIG_IA64_DEBUG_CMPXCHG */
 
 #endif
+
 #endif /* _ASM_IA64_INTRINSICS_H */
diff --git a/include/asm-ia64/mmu_context.h b/include/asm-ia64/mmu_context.h
index cef2400..040bc87 100644
--- a/include/asm-ia64/mmu_context.h
+++ b/include/asm-ia64/mmu_context.h
@@ -152,11 +152,7 @@ reload_context (nv_mm_context_t context)
 #  endif
 #endif
 
-       ia64_set_rr(0x0000000000000000UL, rr0);
-       ia64_set_rr(0x2000000000000000UL, rr1);
-       ia64_set_rr(0x4000000000000000UL, rr2);
-       ia64_set_rr(0x6000000000000000UL, rr3);
-       ia64_set_rr(0x8000000000000000UL, rr4);
+       ia64_set_rr0_to_rr4(rr0, rr1, rr2, rr3, rr4);
        ia64_srlz_i();                  /* srlz.i implies srlz.d */
 }
 
-- 
1.5.3


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