Michael Neuling d4e58e5928 powerpc/powernv: Enable POWER8 doorbell IPIs ...

This patch enables POWER8 doorbell IPIs on powernv.

Since doorbells can only IPI within a core, we test to see when we can use
doorbells and if not we fall back to XICS.  This also enables hypervisor
doorbells to wakeup us up from nap/sleep via the LPCR PECEDH bit.

Based on tests by Anton, the best case IPI latency between two threads dropped
from 894ns to 512ns.

Signed-off-by: Michael Neuling <[email protected]>
Signed-off-by: Benjamin Herrenschmidt <[email protected]>

2014-06-11 17:05:12 +10:00

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icp-hv.c

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icp-native.c

powerpc/powernv: Enable POWER8 doorbell IPIs

2014-06-11 17:05:12 +10:00

ics-opal.c

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ics-rtas.c

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Kconfig

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Makefile

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xics-common.c

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