powerpc/powernv: Add OPAL call to resync timebase on wakeup

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During "Fast-sleep" and deeper power savings state, decrementer and
timebase could be stopped making it out of sync with rest
of the cores in the system.

Add a firmware call to request platform to resync timebase
using low level platform methods.

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

...

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Vaidyanathan Srinivasan 2014-02-26 05:38:43 +05:30 • committed by Benjamin Herrenschmidt

parent aca79d2b6e

commit 97eb001f03

4 changed files with 31 additions and 1 deletions

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2

arch/powerpc/include/asm/opal.h

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2

arch/powerpc/kernel/exceptions-64s.S

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27

arch/powerpc/kernel/idle_power7.S

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1

arch/powerpc/platforms/powernv/opal-wrappers.S

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