powerpc/eeh: Cleanup EEH subsystem variables

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There're 2 EEH subsystem variables: eeh_subsystem_enabled and
eeh_probe_mode. We needn't maintain 2 variables and we can just
have one variable and introduce different flags. The patch also
introduces additional flag EEH_FORCE_DISABLE, which will be used
to disable EEH subsystem via boot parameter ("eeh=off") in future.
Besides, the patch also introduces flag EEH_ENABLED, which is
changed to disable or enable EEH functionality on the fly through
debugfs entry in future.

With the patch applied, the creteria to check the enabled EEH
functionality is changed to:

!EEH_FORCE_DISABLED && EEH_ENABLED : Enabled
                       Other cases : Disabled

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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This commit is contained in:

Gavin Shan 2014-04-24 18:00:17 +10:00 • committed by Benjamin Herrenschmidt

parent 2a18dfc6ee

commit 8a5ad35686

2 changed files with 34 additions and 26 deletions

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29

arch/powerpc/include/asm/eeh.h

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31

arch/powerpc/kernel/eeh.c

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