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Commit 0e1a77cc authored May 19, 2008 by Isaku Yamahata Committed by Tony Luck May 27, 2008

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


[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>

parent 8311d21c

include/asm-ia64/intrinsics.h

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -18,6 +18,15 @@
	# include <asm/gcc_intrin.h>		# include <asm/gcc_intrin.h>
	#endif		#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		* Force an unresolved reference if someone tries to use
	* ia64_fetch_and_add() with a bad value.		* ia64_fetch_and_add() with a bad value.

include/asm-ia64/mmu_context.h

+1 −5

Original line number	Original line	Diff line number	Diff line
	@@ -152,11 +152,7 @@ reload_context (nv_mm_context_t context)
	# endif		# endif
	#endif		#endif

	ia64_set_rr(0x0000000000000000UL, rr0);		ia64_set_rr0_to_rr4(rr0, rr1, rr2, rr3, rr4);
	ia64_set_rr(0x2000000000000000UL, rr1);
	ia64_set_rr(0x4000000000000000UL, rr2);
	ia64_set_rr(0x6000000000000000UL, rr3);
	ia64_set_rr(0x8000000000000000UL, rr4);
	ia64_srlz_i(); /* srlz.i implies srlz.d */		ia64_srlz_i(); /* srlz.i implies srlz.d */
	}		}