[PATCH v2 5/5] powerpc/powernv: Enter deepest supported idle state in offline

From: Shreyas B. Prabhu
Date: Wed Oct 01 2014 - 03:47:53 EST


Enter winkle during offline if supported, else revert to sleep or nap.

Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Signed-off-by: Shreyas B. Prabhu <shreyas@xxxxxxxxxxxxxxxxxx>
---
arch/powerpc/platforms/powernv/smp.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c
index 3ad31d2..e3fc2c9 100644
--- a/arch/powerpc/platforms/powernv/smp.c
+++ b/arch/powerpc/platforms/powernv/smp.c
@@ -169,8 +169,10 @@ static void pnv_smp_cpu_kill_self(void)
while (!generic_check_cpu_restart(cpu)) {
ppc64_runlatch_off();

- /* If sleep is supported, go to sleep, instead of nap */
- if (idle_states & IDLE_USE_SLEEP)
+ /* Go to deepest supported idle state */
+ if (idle_states & IDLE_USE_WINKLE)
+ power7_winkle();
+ else if (idle_states & IDLE_USE_SLEEP)
power7_sleep();
else
power7_nap(1);
--
1.9.3

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