# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Date 1185766635 -32400
# Node ID 179c1791ce821355dc0c9593ce3d58a5188f215a
# Parent 4512b3ccff7de305e21a2ee29ea5a54453f40d04
introduce ia64_set_rr0_to_rr4() and paravirtualize it to eliminate
hyperprivop overhead.
PATCHNAME: ia64_set_rr0_to_rr4
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
diff -r 4512b3ccff7d -r 179c1791ce82 include/asm-ia64/intrinsics.h
--- a/include/asm-ia64/intrinsics.h Mon Jul 30 12:32:04 2007 +0900
+++ b/include/asm-ia64/intrinsics.h Mon Jul 30 12:37:15 2007 +0900
@@ -17,6 +17,15 @@
#else
# 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
diff -r 4512b3ccff7d -r 179c1791ce82 include/asm-ia64/mmu_context.h
--- a/include/asm-ia64/mmu_context.h Mon Jul 30 12:32:04 2007 +0900
+++ b/include/asm-ia64/mmu_context.h Mon Jul 30 12:37:15 2007 +0900
@@ -151,11 +151,7 @@ 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 */
}
diff -r 4512b3ccff7d -r 179c1791ce82 include/asm-ia64/privop.h
--- a/include/asm-ia64/privop.h Mon Jul 30 12:32:04 2007 +0900
+++ b/include/asm-ia64/privop.h Mon Jul 30 12:37:15 2007 +0900
@@ -54,6 +54,7 @@
#define ia64_ret_from_clone __ia64_ret_from_clone
#define ia64_switch_to __ia64_switch_to
#define ia64_pal_call_static __ia64_pal_call_static
+#define ia64_set_rr0_to_rr4 __ia64_set_rr0_to_rr4
#endif /* !IA64_PARAVIRTUALIZED */
diff -r 4512b3ccff7d -r 179c1791ce82 include/asm-ia64/xen/privop.h
--- a/include/asm-ia64/xen/privop.h Mon Jul 30 12:32:04 2007 +0900
+++ b/include/asm-ia64/xen/privop.h Mon Jul 30 12:37:15 2007 +0900
@@ -375,6 +375,21 @@ xen_set_rr(unsigned long index, unsigned
}
static inline void
+xen_set_rr0_to_rr4(unsigned long val0, unsigned long val1,
+ unsigned long val2, unsigned long val3, unsigned long val4)
+{
+ register __u64 __val0 asm ("r8") = val0;
+ register __u64 __val1 asm ("r9") = val1;
+ register __u64 __val2 asm ("r10") = val2;
+ register __u64 __val3 asm ("r11") = val3;
+ register __u64 __val4 asm ("r14") = val4;
+ asm volatile ("break %0" ::
+ "i"(HYPERPRIVOP_SET_RR0_TO_RR4),
+ "r"(__val0), "r"(__val1),
+ "r"(__val2), "r"(__val3), "r"(__val4));
+}
+
+static inline void
xen_set_kr(unsigned long index, unsigned long val)
{
register __u64 __index asm ("r8") = index;
@@ -479,6 +494,16 @@ do {
\
ia64_intri_res = __ia64_get_rr((index)); \
ia64_intri_res; \
})
+
+#define ia64_set_rr0_to_rr4(val0, val1, val2, val3, val4) \
+do { \
+ if (is_running_on_xen()) \
+ xen_set_rr0_to_rr4((val0), (val1), (val2), \
+ (val3), (val4)); \
+ else \
+ __ia64_set_rr0_to_rr4((val0), (val1), (val2), \
+ (val3), (val4)); \
+} while (0)
#define ia64_getreg xen_ia64_getreg
#define ia64_setreg xen_ia64_setreg
diff -r 4512b3ccff7d -r 179c1791ce82 include/xen/interface/arch-ia64.h
--- a/include/xen/interface/arch-ia64.h Mon Jul 30 12:32:04 2007 +0900
+++ b/include/xen/interface/arch-ia64.h Mon Jul 30 12:37:15 2007 +0900
@@ -544,7 +544,8 @@ struct xen_ia64_boot_param {
#define HYPERPRIVOP_SET_EFLAG (HYPERPRIVOP_START + 0x16)
#define HYPERPRIVOP_RSM_BE (HYPERPRIVOP_START + 0x17)
#define HYPERPRIVOP_GET_PSR (HYPERPRIVOP_START + 0x18)
-#define HYPERPRIVOP_MAX (0x19)
+#define HYPERPRIVOP_SET_RR0_TO_RR4 (HYPERPRIVOP_START + 0x19)
+#define HYPERPRIVOP_MAX (0x1a)
/* Fast and light hypercalls. */
#define __HYPERVISOR_ia64_fast_eoi __HYPERVISOR_arch_1
161_179c1791ce82_ia64_set_rr0_to_rr4.patch
Description: Text Data
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