diff options
| -rw-r--r-- | drivers/cpuidle/cpuidle.c | 13 | ||||
| -rw-r--r-- | include/linux/cpuidle.h | 7 | ||||
| -rw-r--r-- | kernel/sched/idle.c | 13 |
3 files changed, 26 insertions, 7 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index c73207abb5a4..afc005b917fe 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -97,7 +97,17 @@ static int find_deepest_state(struct cpuidle_driver *drv, return ret; } -#ifdef CONFIG_SUSPEND +/* Set the current cpu to use the deepest idle state, override governors */ +void cpuidle_use_deepest_state(bool enable) +{ + struct cpuidle_device *dev; + + preempt_disable(); + dev = cpuidle_get_device(); + dev->use_deepest_state = enable; + preempt_enable(); +} + /** * cpuidle_find_deepest_state - Find the deepest available idle state. * @drv: cpuidle driver for the given CPU. @@ -109,6 +119,7 @@ int cpuidle_find_deepest_state(struct cpuidle_driver *drv, return find_deepest_state(drv, dev, UINT_MAX, 0, false); } +#ifdef CONFIG_SUSPEND static void enter_freeze_proper(struct cpuidle_driver *drv, struct cpuidle_device *dev, int index) { diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 15deea449edc..da346f2817a8 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -74,6 +74,7 @@ struct cpuidle_driver_kobj; struct cpuidle_device { unsigned int registered:1; unsigned int enabled:1; + unsigned int use_deepest_state:1; unsigned int cpu; int last_residency; @@ -192,11 +193,12 @@ static inline struct cpuidle_driver *cpuidle_get_cpu_driver( static inline struct cpuidle_device *cpuidle_get_device(void) {return NULL; } #endif -#if defined(CONFIG_CPU_IDLE) && defined(CONFIG_SUSPEND) +#ifdef CONFIG_CPU_IDLE extern int cpuidle_find_deepest_state(struct cpuidle_driver *drv, struct cpuidle_device *dev); extern int cpuidle_enter_freeze(struct cpuidle_driver *drv, struct cpuidle_device *dev); +extern void cpuidle_use_deepest_state(bool enable); #else static inline int cpuidle_find_deepest_state(struct cpuidle_driver *drv, struct cpuidle_device *dev) @@ -204,6 +206,9 @@ static inline int cpuidle_find_deepest_state(struct cpuidle_driver *drv, static inline int cpuidle_enter_freeze(struct cpuidle_driver *drv, struct cpuidle_device *dev) {return -ENODEV; } +static inline void cpuidle_use_deepest_state(bool enable) +{ +} #endif /* kernel/sched/idle.c */ diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index 1d8718d5300d..513e4dfeeae7 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -164,11 +164,14 @@ static void cpuidle_idle_call(void) * timekeeping to prevent timer interrupts from kicking us out of idle * until a proper wakeup interrupt happens. */ - if (idle_should_freeze()) { - entered_state = cpuidle_enter_freeze(drv, dev); - if (entered_state > 0) { - local_irq_enable(); - goto exit_idle; + + if (idle_should_freeze() || dev->use_deepest_state) { + if (idle_should_freeze()) { + entered_state = cpuidle_enter_freeze(drv, dev); + if (entered_state > 0) { + local_irq_enable(); + goto exit_idle; + } } next_state = cpuidle_find_deepest_state(drv, dev); |