intel_idle: improve C-state flags handling robustness

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The following C-state flags are currently mutually-exclusive and should not
be combined:
  * IRQ_ENABLE
  * IBRS
  * XSTATE

There is a warning for the situation when the IRQ_ENABLE flag
is combined with the IBRS flag, but no warnings for other combinations.
This is inconsistent and prone to errors.

Improve the situation by adding warnings for all the unexpected
combinations. Add a couple of helpful commentaries too.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

...

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Artem Bityutskiy 2023-04-19 17:39:44 +03:00 • committed by Rafael J. Wysocki

parent 1abffbd827

commit 00433eae17

1 changed files with 18 additions and 10 deletions

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drivers/idle/intel_idle.c

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