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

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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>
This commit is contained in:
Isaku Yamahata 2008-05-19 22:13:30 +09:00 committed by Tony Luck
parent 8311d21c35
commit 0e1a77ccdb
2 changed files with 10 additions and 5 deletions
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9
include/asm-ia64/intrinsics.h
View file

@ -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.

6
include/asm-ia64/mmu_context.h
View file

@ -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 */
}