[IA64] pvops: preparation: introduce ia64_get_psr_i() to make kernel paravirtualization friendly.
__local_irq_save() and local_save_flags() are used to mask interruptions.
They read all psr bits that requres whole bit emulation.
On the other hand, reading only psr.i, the single bit, can be virtualized
cheaply.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/include/asm-ia64/intrinsics.h b/include/asm-ia64/intrinsics.h
index 9b83f8f..a3b9689 100644
--- a/include/asm-ia64/intrinsics.h
+++ b/include/asm-ia64/intrinsics.h
@@ -18,6 +18,8 @@
# include <asm/gcc_intrin.h>
#endif
+#define ia64_get_psr_i() (ia64_getreg(_IA64_REG_PSR) & IA64_PSR_I)
+
#define ia64_set_rr0_to_rr4(val0, val1, val2, val3, val4) \
do { \
ia64_set_rr(0x0000000000000000UL, (val0)); \