linux/drivers/acpi/processor_driver.c, branch v4.8

Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-07-29T20:55:30Z

Pull smp hotplug updates from Thomas Gleixner: "This is the next part of the hotplug rework. - Convert all notifiers with a priority assigned - Convert all CPU_STARTING/DYING notifiers The final removal of the STARTING/DYING infrastructure will happen when the merge window closes. Another 700 hundred line of unpenetrable maze gone :)" * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits) timers/core: Correct callback order during CPU hot plug leds/trigger/cpu: Move from CPU_STARTING to ONLINE level powerpc/numa: Convert to hotplug state machine arm/perf: Fix hotplug state machine conversion irqchip/armada: Avoid unused function warnings ARC/time: Convert to hotplug state machine clocksource/atlas7: Convert to hotplug state machine clocksource/armada-370-xp: Convert to hotplug state machine clocksource/exynos_mct: Convert to hotplug state machine clocksource/arm_global_timer: Convert to hotplug state machine rcu: Convert rcutree to hotplug state machine KVM/arm/arm64/vgic-new: Convert to hotplug state machine smp/cfd: Convert core to hotplug state machine x86/x2apic: Convert to CPU hotplug state machine profile: Convert to hotplug state machine timers/core: Convert to hotplug state machine hrtimer: Convert to hotplug state machine x86/tboot: Convert to hotplug state machine arm64/armv8 deprecated: Convert to hotplug state machine hwtracing/coresight-etm4x: Convert to hotplug state machine ...

ACPI / processor_idle: Add support for Low Power Idle(LPI) states

2016-07-21T21:25:58Z

ACPI 6.0 introduced an optional object _LPI that provides an alternate method to describe Low Power Idle states. It defines the local power states for each node in a hierarchical processor topology. The OSPM can use _LPI object to select a local power state for each level of processor hierarchy in the system. They used to produce a composite power state request that is presented to the platform by the OSPM. Since multiple processors affect the idle state for any non-leaf hierarchy node, coordination of idle state requests between the processors is required. ACPI supports two different coordination schemes: Platform coordinated and OS initiated. This patch adds initial support for Platform coordination scheme of LPI. Signed-off-by: Sudeep Holla Signed-off-by: Rafael J. Wysocki

ACPI/processor: Avoid STARTING/DYING actions in a more logical way

2016-07-15T08:40:24Z

As part of the hotplug cleanup, the CPU_STARTING/DYING actions are going away soon. This driver needlessly uses those two macro, and so this patch replaces that code with something more sensible. Commit: 8da8373447d6a57a5a9f55233d35beb15d92d0d2 ("ACPI / processor: Fix STARTING/DYING action in acpi_cpu_soft_notify()") added checks for those two actions, because the notification callback can sleep, causing a hung CPU. This patch instead checks for the ONLINE/DEAD actions, which are the ones that are handled by the driver in the first place. Signed-off-by: Richard Cochran Signed-off-by: Anna-Maria Gleixner Reviewed-by: Sebastian Andrzej Siewior Cc: Len Brown Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Rafael J. Wysocki Cc: Thomas Gleixner Cc: linux-acpi@vger.kernel.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153335.964962885@linutronix.de Signed-off-by: Ingo Molnar

ACPI / sleep: move acpi_processor_sleep to sleep.c

2016-02-21T23:53:56Z

acpi_processor_sleep is neither related nor used by CPUIdle framework. It's used in system suspend/resume path as a syscore operation. It makes more sense to move it to acpi/sleep.c where all the S-state transition (a.k.a. Linux system suspend/hiberate) related code are present. Also make it depend on CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT so that it's not compiled on architecture like ARM64 where S-states are not yet defined in ACPI. Signed-off-by: Sudeep Holla Signed-off-by: Rafael J. Wysocki

ACPI / processor: Fix thermal cooling device regression

2015-12-21T02:41:49Z

The processor cooling device is no longer present for passive thermal control. Commit 239708a3af44 ("ACPI: Split out ACPI PSS from ACPI Processor driver") moved the processing to a new function acpi_pss_perf_init(), but missed "return 0" after successful creation. This causes the error handling functions to be called, which will delete the previously created processor cooling device. Fixes: 239708a3af44 (ACPI: Split out ACPI PSS from ACPI Processor driver) Signed-off-by: Srinivas Pandruvada Cc: 4.3+ # 4.3+ Signed-off-by: Rafael J. Wysocki

CPPC: Probe for CPPC tables for each ACPI Processor object

2015-10-12T21:08:04Z

For each detected ACPI Processor object (ACPI0007), search its device handle for CPPC specific tables (i.e. _CPC) and extract CPU specific performance capabilities. Signed-off-by: Ashwin Chaugule Reviewed-by: Al Stone Signed-off-by: Rafael J. Wysocki

Merge branches 'acpi-scan', 'acpi-processor' and 'acpi-assorted'

2015-09-01T01:38:22Z

* acpi-scan: ACPI / bus: Move ACPI bus type registration ACPI / scan: Move bus operations and notification routines to bus.c ACPI / scan: Move device matching code to bus.c ACPI / scan: Move sysfs-related device code to a separate file * acpi-processor: PCC: Disable compilation by default ACPI: Decouple ACPI idle and ACPI processor drivers ACPI: Split out ACPI PSS from ACPI Processor driver PCC: Initialize PCC Mailbox earlier at boot ACPI / processor: remove leftover __refdata annotations * acpi-assorted: ACPI: fix acpi_debugfs_init prototype ACPI: Remove FSF mailing addresses

ACPI: Split out ACPI PSS from ACPI Processor driver

2015-08-25T01:25:47Z

The ACPI processor driver is currently tied too closely to the ACPI P-states (PSS) and other related constructs for controlling CPU performance. The newer ACPI specification (v5.1 onwards) introduces alternative methods to PSS. These new mechanisms are described within each ACPI Processor object and so they need to be scanned whenever a new Processor object is detected. This patch introduces a new Kconfig symbol to allow for finer configurability among the two options for controlling performance states. There is no change in functionality and the option is auto-selected by the architectures which support it. A future commit will introduce support for CPPC: A newer method of controlling CPU performance. The OS is not expected to support CPPC and PSS at the same time, so the Kconfig option lets us make the two mutually exclusive at compile time. Signed-off-by: Ashwin Chaugule [ rjw: Changelog ] Signed-off-by: Rafael J. Wysocki

ACPI / processor: remove leftover __refdata annotations

2015-07-20T23:01:46Z

The processor_handler structure does not reference any __init / __exit code or data. Therefore the __refdata annotation is not needed. It used to be prior to commit fe7bf106ebc2 ("acpi: delete __cpuinit usage from all acpi files") due to the __cpuinit annotation of acpi_processor_add(). But with that commit in place that requirement has gone. The same is true for the acpi_cpu_notifier notifier block. acpi_cpu_soft_notify() used to be marked __cpuinit but lost its annotation in the above mentioned commit as well. Therefore the __refdata annotation isn't needed there either. Just drop the unneded __refdata annotations to be able to catch future section mismatches. Signed-off-by: Mathias Krause Signed-off-by: Rafael J. Wysocki

ACPI: Remove FSF mailing addresses

2015-07-08T00:27:32Z

There is no need to carry potentially outdated Free Software Foundation mailing address in file headers since the COPYING file includes it. Signed-off-by: Jarkko Nikula Signed-off-by: Rafael J. Wysocki