[IA64] pvops: preparation: introduce ia64_get_psr_i() to make kernel paravirtualization friendly.

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__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>

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Isaku Yamahata 2008-05-19 22:13:31 +09:00 • committed by Tony Luck

parent 0e1a77ccdb

commit 72cb4256c7

2 changed files with 10 additions and 2 deletions

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2

include/asm-ia64/intrinsics.h

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10

include/asm-ia64/system.h

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