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authorLinus Torvalds2017-09-05 12:19:08 -0700
committerLinus Torvalds2017-09-05 12:19:08 -0700
commit439644096c1a6afb9bd9953130f4444a856f76c5 (patch)
treecdf21533aa0ec95d084988f234186f8a5071d5df /include/linux
parentb42a362e6d10c342004b183defcb9940331b6737 (diff)
parentd97561f461e4cb5b2e170bc33b466cffbddc8719 (diff)
Merge tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki: "This time (again) cpufreq gets the majority of changes which mostly are driver updates (including a major consolidation of intel_pstate), some schedutil governor modifications and core cleanups. There also are some changes in the system suspend area, mostly related to diagnostics and debug messages plus some renames of things related to suspend-to-idle. One major change here is that suspend-to-idle is now going to be preferred over S3 on systems where the ACPI tables indicate to do so and provide requsite support (the Low Power Idle S0 _DSM in particular). The system sleep documentation and the tools related to it are updated too. The rest is a few cpuidle changes (nothing major), devfreq updates, generic power domains (genpd) framework updates and a few assorted modifications elsewhere. Specifics: - Drop the P-state selection algorithm based on a PID controller from intel_pstate and make it use the same P-state selection method (based on the CPU load) for all types of systems in the active mode (Rafael Wysocki, Srinivas Pandruvada). - Rework the cpufreq core and governors to make it possible to take cross-CPU utilization updates into account and modify the schedutil governor to actually do so (Viresh Kumar). - Clean up the handling of transition latency information in the cpufreq core and untangle it from the information on which drivers cannot do dynamic frequency switching (Viresh Kumar). - Add support for new SoCs (MT2701/MT7623 and MT7622) to the mediatek cpufreq driver and update its DT bindings (Sean Wang). - Modify the cpufreq dt-platdev driver to autimatically create cpufreq devices for the new (v2) Operating Performance Points (OPP) DT bindings and update its whitelist of supported systems (Viresh Kumar, Shubhrajyoti Datta, Marc Gonzalez, Khiem Nguyen, Finley Xiao). - Add support for Ux500 to the cpufreq-dt driver and drop the obsolete dbx500 cpufreq driver (Linus Walleij, Arnd Bergmann). - Add new SoC (R8A7795) support to the cpufreq rcar driver (Khiem Nguyen). - Fix and clean up assorted issues in the cpufreq drivers and core (Arvind Yadav, Christophe Jaillet, Colin Ian King, Gustavo Silva, Julia Lawall, Leonard Crestez, Rob Herring, Sudeep Holla). - Update the IO-wait boost handling in the schedutil governor to make it less aggressive (Joel Fernandes). - Rework system suspend diagnostics to make it print fewer messages to the kernel log by default, add a sysfs knob to allow more suspend-related messages to be printed and add Low Power S0 Idle constraints checks to the ACPI suspend-to-idle code (Rafael Wysocki, Srinivas Pandruvada). - Prefer suspend-to-idle over S3 on ACPI-based systems with the ACPI_FADT_LOW_POWER_S0 flag set and the Low Power Idle S0 _DSM interface present in the ACPI tables (Rafael Wysocki). - Update documentation related to system sleep and rename a number of items in the code to make it cleare that they are related to suspend-to-idle (Rafael Wysocki). - Export a variable allowing device drivers to check the target system sleep state from the core system suspend code (Florian Fainelli). - Clean up the cpuidle subsystem to handle the polling state on x86 in a more straightforward way and to use %pOF instead of full_name (Rafael Wysocki, Rob Herring). - Update the devfreq framework to fix and clean up a few minor issues (Chanwoo Choi, Rob Herring). - Extend diagnostics in the generic power domains (genpd) framework and clean it up slightly (Thara Gopinath, Rob Herring). - Fix and clean up a couple of issues in the operating performance points (OPP) framework (Viresh Kumar, Waldemar Rymarkiewicz). - Add support for RV1108 to the rockchip-io Adaptive Voltage Scaling (AVS) driver (David Wu). - Fix the usage of notifiers in CPU power management on some platforms (Alex Shi). - Update the pm-graph system suspend/hibernation and boot profiling utility (Todd Brandt). - Make it possible to run the cpupower utility without CPU0 (Prarit Bhargava)" * tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (87 commits) cpuidle: Make drivers initialize polling state cpuidle: Move polling state initialization code to separate file cpuidle: Eliminate the CPUIDLE_DRIVER_STATE_START symbol cpufreq: imx6q: Fix imx6sx low frequency support cpufreq: speedstep-lib: make several arrays static, makes code smaller PM: docs: Delete the obsolete states.txt document PM: docs: Describe high-level PM strategies and sleep states PM / devfreq: Fix memory leak when fail to register device PM / devfreq: Add dependency on PM_OPP PM / devfreq: Move private devfreq_update_stats() into devfreq PM / devfreq: Convert to using %pOF instead of full_name PM / AVS: rockchip-io: add io selectors and supplies for RV1108 cpufreq: ti: Fix 'of_node_put' being called twice in error handling path cpufreq: dt-platdev: Drop few entries from whitelist cpufreq: dt-platdev: Automatically create cpufreq device with OPP v2 ARM: ux500: don't select CPUFREQ_DT cpuidle: Convert to using %pOF instead of full_name cpufreq: Convert to using %pOF instead of full_name PM / Domains: Convert to using %pOF instead of full_name cpufreq: Cap the default transition delay value to 10 ms ...
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/cpufreq.h38
-rw-r--r--include/linux/cpuidle.h21
-rw-r--r--include/linux/devfreq.h13
-rw-r--r--include/linux/pm.h4
-rw-r--r--include/linux/pm_domain.h3
-rw-r--r--include/linux/suspend.h48
6 files changed, 80 insertions, 47 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index f10a9b3761cd..537ff842ff73 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -127,6 +127,15 @@ struct cpufreq_policy {
*/
unsigned int transition_delay_us;
+ /*
+ * Remote DVFS flag (Not added to the driver structure as we don't want
+ * to access another structure from scheduler hotpath).
+ *
+ * Should be set if CPUs can do DVFS on behalf of other CPUs from
+ * different cpufreq policies.
+ */
+ bool dvfs_possible_from_any_cpu;
+
/* Cached frequency lookup from cpufreq_driver_resolve_freq. */
unsigned int cached_target_freq;
int cached_resolved_idx;
@@ -370,6 +379,12 @@ struct cpufreq_driver {
*/
#define CPUFREQ_NEED_INITIAL_FREQ_CHECK (1 << 5)
+/*
+ * Set by drivers to disallow use of governors with "dynamic_switching" flag
+ * set.
+ */
+#define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING (1 << 6)
+
int cpufreq_register_driver(struct cpufreq_driver *driver_data);
int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
@@ -487,14 +502,8 @@ static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
* polling frequency is 1000 times the transition latency of the processor. The
* ondemand governor will work on any processor with transition latency <= 10ms,
* using appropriate sampling rate.
- *
- * For CPUs with transition latency > 10ms (mostly drivers with CPUFREQ_ETERNAL)
- * the ondemand governor will not work. All times here are in us (microseconds).
*/
-#define MIN_SAMPLING_RATE_RATIO (2)
#define LATENCY_MULTIPLIER (1000)
-#define MIN_LATENCY_MULTIPLIER (20)
-#define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000)
struct cpufreq_governor {
char name[CPUFREQ_NAME_LEN];
@@ -507,9 +516,8 @@ struct cpufreq_governor {
char *buf);
int (*store_setspeed) (struct cpufreq_policy *policy,
unsigned int freq);
- unsigned int max_transition_latency; /* HW must be able to switch to
- next freq faster than this value in nano secs or we
- will fallback to performance governor */
+ /* For governors which change frequency dynamically by themselves */
+ bool dynamic_switching;
struct list_head governor_list;
struct module *owner;
};
@@ -525,6 +533,7 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
unsigned int relation);
unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
unsigned int target_freq);
+unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy);
int cpufreq_register_governor(struct cpufreq_governor *governor);
void cpufreq_unregister_governor(struct cpufreq_governor *governor);
@@ -562,6 +571,17 @@ struct governor_attr {
size_t count);
};
+static inline bool cpufreq_can_do_remote_dvfs(struct cpufreq_policy *policy)
+{
+ /*
+ * Allow remote callbacks if:
+ * - dvfs_possible_from_any_cpu flag is set
+ * - the local and remote CPUs share cpufreq policy
+ */
+ return policy->dvfs_possible_from_any_cpu ||
+ cpumask_test_cpu(smp_processor_id(), policy->cpus);
+}
+
/*********************************************************************
* FREQUENCY TABLE HELPERS *
*********************************************************************/
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index fc1e5d7fc1c7..8f7788d23b57 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -52,17 +52,18 @@ struct cpuidle_state {
int (*enter_dead) (struct cpuidle_device *dev, int index);
/*
- * CPUs execute ->enter_freeze with the local tick or entire timekeeping
+ * CPUs execute ->enter_s2idle with the local tick or entire timekeeping
* suspended, so it must not re-enable interrupts at any point (even
* temporarily) or attempt to change states of clock event devices.
*/
- void (*enter_freeze) (struct cpuidle_device *dev,
+ void (*enter_s2idle) (struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index);
};
/* Idle State Flags */
#define CPUIDLE_FLAG_NONE (0x00)
+#define CPUIDLE_FLAG_POLLING (0x01) /* polling state */
#define CPUIDLE_FLAG_COUPLED (0x02) /* state applies to multiple cpus */
#define CPUIDLE_FLAG_TIMER_STOP (0x04) /* timer is stopped on this state */
@@ -197,14 +198,14 @@ static inline struct cpuidle_device *cpuidle_get_device(void) {return NULL; }
#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,
+extern int cpuidle_enter_s2idle(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)
{return -ENODEV; }
-static inline int cpuidle_enter_freeze(struct cpuidle_driver *drv,
+static inline int cpuidle_enter_s2idle(struct cpuidle_driver *drv,
struct cpuidle_device *dev)
{return -ENODEV; }
static inline void cpuidle_use_deepest_state(bool enable)
@@ -224,6 +225,12 @@ static inline void cpuidle_coupled_parallel_barrier(struct cpuidle_device *dev,
}
#endif
+#ifdef CONFIG_ARCH_HAS_CPU_RELAX
+void cpuidle_poll_state_init(struct cpuidle_driver *drv);
+#else
+static inline void cpuidle_poll_state_init(struct cpuidle_driver *drv) {}
+#endif
+
/******************************
* CPUIDLE GOVERNOR INTERFACE *
******************************/
@@ -250,12 +257,6 @@ static inline int cpuidle_register_governor(struct cpuidle_governor *gov)
{return 0;}
#endif
-#ifdef CONFIG_ARCH_HAS_CPU_RELAX
-#define CPUIDLE_DRIVER_STATE_START 1
-#else
-#define CPUIDLE_DRIVER_STATE_START 0
-#endif
-
#define CPU_PM_CPU_IDLE_ENTER(low_level_idle_enter, idx) \
({ \
int __ret; \
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index 6c220e4ebb6b..597294e0cc40 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -214,19 +214,6 @@ extern void devm_devfreq_unregister_notifier(struct device *dev,
extern struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev,
int index);
-/**
- * devfreq_update_stats() - update the last_status pointer in struct devfreq
- * @df: the devfreq instance whose status needs updating
- *
- * Governors are recommended to use this function along with last_status,
- * which allows other entities to reuse the last_status without affecting
- * the values fetched later by governors.
- */
-static inline int devfreq_update_stats(struct devfreq *df)
-{
- return df->profile->get_dev_status(df->dev.parent, &df->last_status);
-}
-
#if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)
/**
* struct devfreq_simple_ondemand_data - void *data fed to struct devfreq
diff --git a/include/linux/pm.h b/include/linux/pm.h
index b8b4df09fd8f..47ded8aa8a5d 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -689,6 +689,8 @@ struct dev_pm_domain {
extern void device_pm_lock(void);
extern void dpm_resume_start(pm_message_t state);
extern void dpm_resume_end(pm_message_t state);
+extern void dpm_noirq_resume_devices(pm_message_t state);
+extern void dpm_noirq_end(void);
extern void dpm_resume_noirq(pm_message_t state);
extern void dpm_resume_early(pm_message_t state);
extern void dpm_resume(pm_message_t state);
@@ -697,6 +699,8 @@ extern void dpm_complete(pm_message_t state);
extern void device_pm_unlock(void);
extern int dpm_suspend_end(pm_message_t state);
extern int dpm_suspend_start(pm_message_t state);
+extern void dpm_noirq_begin(void);
+extern int dpm_noirq_suspend_devices(pm_message_t state);
extern int dpm_suspend_noirq(pm_message_t state);
extern int dpm_suspend_late(pm_message_t state);
extern int dpm_suspend(pm_message_t state);
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 41004d97cefa..84f423d5633e 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -43,6 +43,7 @@ struct genpd_power_state {
s64 power_on_latency_ns;
s64 residency_ns;
struct fwnode_handle *fwnode;
+ ktime_t idle_time;
};
struct genpd_lock_ops;
@@ -78,6 +79,8 @@ struct generic_pm_domain {
unsigned int state_count; /* number of states */
unsigned int state_idx; /* state that genpd will go to when off */
void *free; /* Free the state that was allocated for default */
+ ktime_t on_time;
+ ktime_t accounting_time;
const struct genpd_lock_ops *lock_ops;
union {
struct mutex mlock;
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 0b1cf32edfd7..d10b7980799d 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -33,10 +33,10 @@ static inline void pm_restore_console(void)
typedef int __bitwise suspend_state_t;
#define PM_SUSPEND_ON ((__force suspend_state_t) 0)
-#define PM_SUSPEND_FREEZE ((__force suspend_state_t) 1)
+#define PM_SUSPEND_TO_IDLE ((__force suspend_state_t) 1)
#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 2)
#define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
-#define PM_SUSPEND_MIN PM_SUSPEND_FREEZE
+#define PM_SUSPEND_MIN PM_SUSPEND_TO_IDLE
#define PM_SUSPEND_MAX ((__force suspend_state_t) 4)
enum suspend_stat_step {
@@ -186,7 +186,7 @@ struct platform_suspend_ops {
void (*recover)(void);
};
-struct platform_freeze_ops {
+struct platform_s2idle_ops {
int (*begin)(void);
int (*prepare)(void);
void (*wake)(void);
@@ -196,6 +196,9 @@ struct platform_freeze_ops {
};
#ifdef CONFIG_SUSPEND
+extern suspend_state_t mem_sleep_current;
+extern suspend_state_t mem_sleep_default;
+
/**
* suspend_set_ops - set platform dependent suspend operations
* @ops: The new suspend operations to set.
@@ -234,22 +237,22 @@ static inline bool pm_resume_via_firmware(void)
}
/* Suspend-to-idle state machnine. */
-enum freeze_state {
- FREEZE_STATE_NONE, /* Not suspended/suspending. */
- FREEZE_STATE_ENTER, /* Enter suspend-to-idle. */
- FREEZE_STATE_WAKE, /* Wake up from suspend-to-idle. */
+enum s2idle_states {
+ S2IDLE_STATE_NONE, /* Not suspended/suspending. */
+ S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */
+ S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */
};
-extern enum freeze_state __read_mostly suspend_freeze_state;
+extern enum s2idle_states __read_mostly s2idle_state;
-static inline bool idle_should_freeze(void)
+static inline bool idle_should_enter_s2idle(void)
{
- return unlikely(suspend_freeze_state == FREEZE_STATE_ENTER);
+ return unlikely(s2idle_state == S2IDLE_STATE_ENTER);
}
extern void __init pm_states_init(void);
-extern void freeze_set_ops(const struct platform_freeze_ops *ops);
-extern void freeze_wake(void);
+extern void s2idle_set_ops(const struct platform_s2idle_ops *ops);
+extern void s2idle_wake(void);
/**
* arch_suspend_disable_irqs - disable IRQs for suspend
@@ -281,10 +284,10 @@ static inline bool pm_resume_via_firmware(void) { return false; }
static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {}
static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
-static inline bool idle_should_freeze(void) { return false; }
+static inline bool idle_should_enter_s2idle(void) { return false; }
static inline void __init pm_states_init(void) {}
-static inline void freeze_set_ops(const struct platform_freeze_ops *ops) {}
-static inline void freeze_wake(void) {}
+static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {}
+static inline void s2idle_wake(void) {}
#endif /* !CONFIG_SUSPEND */
/* struct pbe is used for creating lists of pages that should be restored
@@ -427,6 +430,7 @@ extern int unregister_pm_notifier(struct notifier_block *nb);
/* drivers/base/power/wakeup.c */
extern bool events_check_enabled;
extern unsigned int pm_wakeup_irq;
+extern suspend_state_t pm_suspend_target_state;
extern bool pm_wakeup_pending(void);
extern void pm_system_wakeup(void);
@@ -491,10 +495,24 @@ static inline void unlock_system_sleep(void) {}
#ifdef CONFIG_PM_SLEEP_DEBUG
extern bool pm_print_times_enabled;
+extern bool pm_debug_messages_on;
+extern __printf(2, 3) void __pm_pr_dbg(bool defer, const char *fmt, ...);
#else
#define pm_print_times_enabled (false)
+#define pm_debug_messages_on (false)
+
+#include <linux/printk.h>
+
+#define __pm_pr_dbg(defer, fmt, ...) \
+ no_printk(KERN_DEBUG fmt, ##__VA_ARGS__)
#endif
+#define pm_pr_dbg(fmt, ...) \
+ __pm_pr_dbg(false, fmt, ##__VA_ARGS__)
+
+#define pm_deferred_pr_dbg(fmt, ...) \
+ __pm_pr_dbg(true, fmt, ##__VA_ARGS__)
+
#ifdef CONFIG_PM_AUTOSLEEP
/* kernel/power/autosleep.c */