Commit 95acdc07 authored Jun 13, 2017 by Nicholas Piggin Committed by Michael Ellerman Jun 19, 2017

powerpc/64s/idle: Predict HMI wakeup as unlikely



In a busy system, idle wakeups can be expected from IPIs and device
interrupts.

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent 9d292501

arch/powerpc/kernel/idle_book3s.S

+1 −1

Original line number	Diff line number	Diff line
		@@ -306,7 +306,7 @@ FTR_SECTION_ELSE_NESTED(66); \
		rlwinm r0,r12,45-31,0xe; /* P7 wake reason field is 3 bits */ \
		ALT_FTR_SECTION_END_NESTED_IFSET(CPU_FTR_ARCH_207S, 66); \
		cmpwi r0,0xa; /* Hypervisor maintenance ? */ \
		bne 20f; \
		bne+ 20f; \
		/* Invoke opal call to handle hmi */ \
		ld r2,PACATOC(r13); \
		ld r1,PACAR1(r13); \

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