diff options
| author | Boris Ostrovsky <boris.ostrovsky@amd.com> | 2012-03-13 19:55:09 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-03-30 03:23:01 -0400 |
| commit | 1a022e3f1be11730bd8747b1af96a0274bf6356e (patch) | |
| tree | d3c95b68626ac7d963ac3a85a07dae1cfc011906 /include/linux/cpuidle.h | |
| parent | e07510585a88c0f6c6c728e2e006aa913496d4ae (diff) | |
| download | linux-rt-1a022e3f1be11730bd8747b1af96a0274bf6356e.tar.gz | |
idle, x86: Allow off-lined CPU to enter deeper C states
Currently when a CPU is off-lined it enters either MWAIT-based idle or,
if MWAIT is not desired or supported, HLT-based idle (which places the
processor in C1 state). This patch allows processors without MWAIT
support to stay in states deeper than C1.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/linux/cpuidle.h')
| -rw-r--r-- | include/linux/cpuidle.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index f3ebbba368b3..d557bcd0ada7 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -51,6 +51,8 @@ struct cpuidle_state { int (*enter) (struct cpuidle_device *dev, struct cpuidle_driver *drv, int index); + + int (*enter_dead) (struct cpuidle_device *dev, int index); }; /* Idle State Flags */ @@ -147,6 +149,8 @@ extern int cpuidle_wrap_enter(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index, int (*enter)(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index)); +extern int cpuidle_play_dead(void); + #else static inline void disable_cpuidle(void) { } static inline int cpuidle_idle_call(void) { return -ENODEV; } @@ -168,6 +172,7 @@ static inline int cpuidle_wrap_enter(struct cpuidle_device *dev, int (*enter)(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index)) { return -ENODEV; } +static inline int cpuidle_play_dead(void) {return -ENODEV; } #endif |