Merge branches 'pm-cpuidle' and 'pm-opp'
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>
Thu, 15 Feb 2018 11:01:53 +0000 (12:01 +0100)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Thu, 15 Feb 2018 11:01:53 +0000 (12:01 +0100)
* pm-cpuidle:
  PM: cpuidle: Fix cpuidle_poll_state_init() prototype
  Documentation/ABI: update cpuidle sysfs documentation

* pm-opp:
  opp: cpu: Replace GFP_ATOMIC with GFP_KERNEL in dev_pm_opp_init_cpufreq_table

Documentation/ABI/testing/sysfs-devices-system-cpu
drivers/base/core.c
drivers/base/power/wakeirq.c
include/linux/cpuidle.h

index bfd29bc8d37af1bbc4913deee9d941b1692bedda..4ed63b6cfb155cbc8b5aaab64e1030662f19411f 100644 (file)
@@ -108,6 +108,8 @@ Description:        CPU topology files that describe a logical CPU's relationship
 
 What:          /sys/devices/system/cpu/cpuidle/current_driver
                /sys/devices/system/cpu/cpuidle/current_governer_ro
+               /sys/devices/system/cpu/cpuidle/available_governors
+               /sys/devices/system/cpu/cpuidle/current_governor
 Date:          September 2007
 Contact:       Linux kernel mailing list <linux-kernel@vger.kernel.org>
 Description:   Discover cpuidle policy and mechanism
@@ -119,13 +121,84 @@ Description:      Discover cpuidle policy and mechanism
                Idle policy (governor) is differentiated from idle mechanism
                (driver)
 
-               current_driver: displays current idle mechanism
+               current_driver: (RO) displays current idle mechanism
 
-               current_governor_ro: displays current idle policy
+               current_governor_ro: (RO) displays current idle policy
+
+               With the cpuidle_sysfs_switch boot option enabled (meant for
+               developer testing), the following three attributes are visible
+               instead:
+
+               current_driver: same as described above
+
+               available_governors: (RO) displays a space separated list of
+               available governors
+
+               current_governor: (RW) displays current idle policy. Users can
+               switch the governor at runtime by writing to this file.
 
                See files in Documentation/cpuidle/ for more information.
 
 
+What:          /sys/devices/system/cpu/cpuX/cpuidle/stateN/name
+               /sys/devices/system/cpu/cpuX/cpuidle/stateN/latency
+               /sys/devices/system/cpu/cpuX/cpuidle/stateN/power
+               /sys/devices/system/cpu/cpuX/cpuidle/stateN/time
+               /sys/devices/system/cpu/cpuX/cpuidle/stateN/usage
+Date:          September 2007
+KernelVersion: v2.6.24
+Contact:       Linux power management list <linux-pm@vger.kernel.org>
+Description:
+               The directory /sys/devices/system/cpu/cpuX/cpuidle contains per
+               logical CPU specific cpuidle information for each online cpu X.
+               The processor idle states which are available for use have the
+               following attributes:
+
+               name: (RO) Name of the idle state (string).
+
+               latency: (RO) The latency to exit out of this idle state (in
+               microseconds).
+
+               power: (RO) The power consumed while in this idle state (in
+               milliwatts).
+
+               time: (RO) The total time spent in this idle state (in microseconds).
+
+               usage: (RO) Number of times this state was entered (a count).
+
+
+What:          /sys/devices/system/cpu/cpuX/cpuidle/stateN/desc
+Date:          February 2008
+KernelVersion: v2.6.25
+Contact:       Linux power management list <linux-pm@vger.kernel.org>
+Description:
+               (RO) A small description about the idle state (string).
+
+
+What:          /sys/devices/system/cpu/cpuX/cpuidle/stateN/disable
+Date:          March 2012
+KernelVersion: v3.10
+Contact:       Linux power management list <linux-pm@vger.kernel.org>
+Description:
+               (RW) Option to disable this idle state (bool). The behavior and
+               the effect of the disable variable depends on the implementation
+               of a particular governor. In the ladder governor, for example,
+               it is not coherent, i.e. if one is disabling a light state, then
+               all deeper states are disabled as well, but the disable variable
+               does not reflect it. Likewise, if one enables a deep state but a
+               lighter state still is disabled, then this has no effect.
+
+
+What:          /sys/devices/system/cpu/cpuX/cpuidle/stateN/residency
+Date:          March 2014
+KernelVersion: v3.15
+Contact:       Linux power management list <linux-pm@vger.kernel.org>
+Description:
+               (RO) Display the target residency i.e. the minimum amount of
+               time (in microseconds) this cpu should spend in this idle state
+               to make the transition worth the effort.
+
+
 What:          /sys/devices/system/cpu/cpu#/cpufreq/*
 Date:          pre-git history
 Contact:       linux-pm@vger.kernel.org
index b2261f92f2f1c1356b8e2f78e915cce9efff36ba..5847364f25d96721ea6ce13f81bd8ead83504cb7 100644 (file)
@@ -310,6 +310,9 @@ static void __device_link_del(struct device_link *link)
        dev_info(link->consumer, "Dropping the link to %s\n",
                 dev_name(link->supplier));
 
+       if (link->flags & DL_FLAG_PM_RUNTIME)
+               pm_runtime_drop_link(link->consumer);
+
        list_del(&link->s_node);
        list_del(&link->c_node);
        device_link_free(link);
index a8ac86e4d79e73f758301bdc8f690dddb795b671..6637fc319269ba9f93a4c7ae44422723656033c8 100644 (file)
@@ -321,7 +321,8 @@ void dev_pm_arm_wake_irq(struct wake_irq *wirq)
                return;
 
        if (device_may_wakeup(wirq->dev)) {
-               if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED)
+               if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED &&
+                   !pm_runtime_status_suspended(wirq->dev))
                        enable_irq(wirq->irq);
 
                enable_irq_wake(wirq->irq);
@@ -343,7 +344,8 @@ void dev_pm_disarm_wake_irq(struct wake_irq *wirq)
        if (device_may_wakeup(wirq->dev)) {
                disable_irq_wake(wirq->irq);
 
-               if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED)
+               if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED &&
+                   !pm_runtime_status_suspended(wirq->dev))
                        disable_irq_nosync(wirq->irq);
        }
 }
index 871f9e21810c8ebd22c3b1686777bc7c258cf8cf..0b3fc229086ca6cb98d24645c487ab097d6566e5 100644 (file)
@@ -225,7 +225,7 @@ static inline void cpuidle_coupled_parallel_barrier(struct cpuidle_device *dev,
 }
 #endif
 
-#ifdef CONFIG_ARCH_HAS_CPU_RELAX
+#if defined(CONFIG_CPU_IDLE) && defined(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) {}