mirror of https://gitee.com/openkylin/linux.git
432 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Linus Torvalds
|
fa9a67ef9d |
Additional power management and ACPI material for v4.3-rc1
- Build fix for the new Mediatek MT8173 cpufreq driver (Guenter Roeck).
- Generic power domains framework fixes (power on error code
path, subdomain removal) and cleanup of a deprecated API user
(Geert Uytterhoeven, Jon Hunter, Ulf Hansson).
- cpufreq-dt driver fixes including two fixes for bugs related to
the new Operating Performance Points Device Tree bindings
introduced recently (Viresh Kumar).
- Suspend frequency support for the cpufreq-dt driver
(Bartlomiej Zolnierkiewicz, Viresh Kumar).
- cpufreq core cleanups (Viresh Kumar).
- intel_pstate driver fixes (Chen Yu, Kristen Carlson Accardi).
- Additional sanity check in the cpuidle core (Xunlei Pang).
- Fix for a comment related to CPU power management (Lina Iyer).
/
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Merge tag 'pm+acpi-4.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management and ACPI updates from Rafael Wysocki:
"These are mostly fixes and cleanups on top of the previous PM+ACPI
pull request (cpufreq core and drivers, cpuidle, generic power domains
framework). Some of them didn't make to that pull request and some
fix issues introduced by it.
The only really new thing is the support for suspend frequency in the
cpufreq-dt driver, but it is needed to fix an issue with Exynos
platforms.
Specifics:
- build fix for the new Mediatek MT8173 cpufreq driver (Guenter
Roeck).
- generic power domains framework fixes (power on error code path,
subdomain removal) and cleanup of a deprecated API user (Geert
Uytterhoeven, Jon Hunter, Ulf Hansson).
- cpufreq-dt driver fixes including two fixes for bugs related to the
new Operating Performance Points Device Tree bindings introduced
recently (Viresh Kumar).
- suspend frequency support for the cpufreq-dt driver (Bartlomiej
Zolnierkiewicz, Viresh Kumar).
- cpufreq core cleanups (Viresh Kumar).
- intel_pstate driver fixes (Chen Yu, Kristen Carlson Accardi).
- additional sanity check in the cpuidle core (Xunlei Pang).
- fix for a comment related to CPU power management (Lina Iyer)"
* tag 'pm+acpi-4.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
intel_pstate: fix PCT_TO_HWP macro
intel_pstate: Fix user input of min/max to legal policy region
PM / OPP: Return suspend_opp only if it is enabled
cpufreq-dt: add suspend frequency support
cpufreq: allow cpufreq_generic_suspend() to work without suspend frequency
PM / OPP: add dev_pm_opp_get_suspend_opp() helper
staging: board: Migrate away from __pm_genpd_name_add_device()
cpufreq: Use __func__ to print function's name
cpufreq: staticize cpufreq_cpu_get_raw()
PM / Domains: Ensure subdomain is not in use before removing
cpufreq: Add ARM_MT8173_CPUFREQ dependency on THERMAL
cpuidle/coupled: Add sanity check for safe_state_index
PM / Domains: Try power off masters in error path of __pm_genpd_poweron()
cpufreq: dt: Tolerance applies on both sides of target voltage
cpufreq: dt: Print error on failing to mark OPPs as shared
cpufreq: dt: Check OPP count before marking them shared
kernel/cpu_pm: fix cpu_cluster_pm_exit comment
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Rafael J. Wysocki
|
4614e0cc66 |
Merge branches 'pm-cpu', 'pm-cpuidle' and 'pm-domains'
* pm-cpu: kernel/cpu_pm: fix cpu_cluster_pm_exit comment * pm-cpuidle: cpuidle/coupled: Add sanity check for safe_state_index * pm-domains: staging: board: Migrate away from __pm_genpd_name_add_device() PM / Domains: Ensure subdomain is not in use before removing PM / Domains: Try power off masters in error path of __pm_genpd_poweron() |
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Linus Torvalds
|
c706c7eb0d |
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM development updates from Russell King:
"Included in this update:
- moving PSCI code from ARM64/ARM to drivers/
- removal of some architecture internals from global kernel view
- addition of software based "privileged no access" support using the
old domains register to turn off the ability for kernel
loads/stores to access userspace. Only the proper accessors will
be usable.
- addition of early fixup support for early console
- re-addition (and reimplementation) of OMAP special interconnect
barrier
- removal of finish_arch_switch()
- only expose cpuX/online in sysfs if hotpluggable
- a number of code cleanups"
* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (41 commits)
ARM: software-based priviledged-no-access support
ARM: entry: provide uaccess assembly macro hooks
ARM: entry: get rid of multiple macro definitions
ARM: 8421/1: smp: Collapse arch_cpu_idle_dead() into cpu_die()
ARM: uaccess: provide uaccess_save_and_enable() and uaccess_restore()
ARM: mm: improve do_ldrd_abort macro
ARM: entry: ensure that IRQs are enabled when calling syscall_trace_exit()
ARM: entry: efficiency cleanups
ARM: entry: get rid of asm_trace_hardirqs_on_cond
ARM: uaccess: simplify user access assembly
ARM: domains: remove DOMAIN_TABLE
ARM: domains: keep vectors in separate domain
ARM: domains: get rid of manager mode for user domain
ARM: domains: move initial domain setting value to asm/domains.h
ARM: domains: provide domain_mask()
ARM: domains: switch to keeping domain value in register
ARM: 8419/1: dma-mapping: harmonize definition of DMA_ERROR_CODE
ARM: 8417/1: refactor bitops functions with BIT_MASK() and BIT_WORD()
ARM: 8416/1: Feroceon: use of_iomap() to map register base
ARM: 8415/1: early fixmap support for earlycon
...
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Xunlei Pang
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abceaa9cde |
cpuidle/coupled: Add sanity check for safe_state_index
Since we are using cpuidle_driver::safe_state_index directly as the target state index, it is better to add the sanity check at the point of registering the driver. Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Linus Torvalds
|
ae98207309 |
Power management and ACPI material for v4.3-rc1
- ACPICA update to upstream revision 20150818 including method
tracing extensions to allow more in-depth AML debugging in the
kernel and a number of assorted fixes and cleanups (Bob Moore,
Lv Zheng, Markus Elfring).
- ACPI sysfs code updates and a documentation update related to
AML method tracing (Lv Zheng).
- ACPI EC driver fix related to serialized evaluations of _Qxx
methods and ACPI tools updates allowing the EC userspace tool
to be built from the kernel source (Lv Zheng).
- ACPI processor driver updates preparing it for future
introduction of CPPC support and ACPI PCC mailbox driver
updates (Ashwin Chaugule).
- ACPI interrupts enumeration fix for a regression related
to the handling of IRQ attribute conflicts between MADT
and the ACPI namespace (Jiang Liu).
- Fixes related to ACPI device PM (Mika Westerberg, Srinidhi Kasagar).
- ACPI device registration code reorganization to separate the
sysfs-related code and bus type operations from the rest (Rafael
J Wysocki).
- Assorted cleanups in the ACPI core (Jarkko Nikula, Mathias Krause,
Andy Shevchenko, Rafael J Wysocki, Nicolas Iooss).
- ACPI cpufreq driver and ia64 cpufreq driver fixes and cleanups
(Pan Xinhui, Rafael J Wysocki).
- cpufreq core cleanups on top of the previous changes allowing it
to preseve its sysfs directories over system suspend/resume (Viresh
Kumar, Rafael J Wysocki, Sebastian Andrzej Siewior).
- cpufreq fixes and cleanups related to governors (Viresh Kumar).
- cpufreq updates (core and the cpufreq-dt driver) related to the
turbo/boost mode support (Viresh Kumar, Bartlomiej Zolnierkiewicz).
- New DT bindings for Operating Performance Points (OPP), support
for them in the OPP framework and in the cpufreq-dt driver plus
related OPP framework fixes and cleanups (Viresh Kumar).
- cpufreq powernv driver updates (Shilpasri G Bhat).
- New cpufreq driver for Mediatek MT8173 (Pi-Cheng Chen).
- Assorted cpufreq driver (speedstep-lib, sfi, integrator) cleanups
and fixes (Abhilash Jindal, Andrzej Hajda, Cristian Ardelean).
- intel_pstate driver updates including Skylake-S support, support
for enabling HW P-states per CPU and an additional vendor bypass
list entry (Kristen Carlson Accardi, Chen Yu, Ethan Zhao).
- cpuidle core fixes related to the handling of coupled idle states
(Xunlei Pang).
- intel_idle driver updates including Skylake Client support and
support for freeze-mode-specific idle states (Len Brown).
- Driver core updates related to power management (Andy Shevchenko,
Rafael J Wysocki).
- Generic power domains framework fixes and cleanups (Jon Hunter,
Geert Uytterhoeven, Rajendra Nayak, Ulf Hansson).
- Device PM QoS framework update to allow the latency tolerance
setting to be exposed to user space via sysfs (Mika Westerberg).
- devfreq support for PPMUv2 in Exynos5433 and a fix for an incorrect
exynos-ppmu DT binding (Chanwoo Choi, Javier Martinez Canillas).
- System sleep support updates (Alan Stern, Len Brown, SungEun Kim).
- rockchip-io AVS support updates (Heiko Stuebner).
- PM core clocks support fixup (Colin Ian King).
- Power capping RAPL driver update including support for Skylake H/S
and Broadwell-H (Radivoje Jovanovic, Seiichi Ikarashi).
- Generic device properties framework fixes related to the handling
of static (driver-provided) property sets (Andy Shevchenko).
- turbostat and cpupower updates (Len Brown, Shilpasri G Bhat,
Shreyas B Prabhu).
/
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Merge tag 'pm+acpi-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI updates from Rafael Wysocki:
"From the number of commits perspective, the biggest items are ACPICA
and cpufreq changes with the latter taking the lead (over 50 commits).
On the cpufreq front, there are many cleanups and minor fixes in the
core and governors, driver updates etc. We also have a new cpufreq
driver for Mediatek MT8173 chips.
ACPICA mostly updates its debug infrastructure and adds a number of
fixes and cleanups for a good measure.
The Operating Performance Points (OPP) framework is updated with new
DT bindings and support for them among other things.
We have a few updates of the generic power domains framework and a
reorganization of the ACPI device enumeration code and bus type
operations.
And a lot of fixes and cleanups all over.
Included is one branch from the MFD tree as it contains some
PM-related driver core and ACPI PM changes a few other commits are
based on.
Specifics:
- ACPICA update to upstream revision 20150818 including method
tracing extensions to allow more in-depth AML debugging in the
kernel and a number of assorted fixes and cleanups (Bob Moore, Lv
Zheng, Markus Elfring).
- ACPI sysfs code updates and a documentation update related to AML
method tracing (Lv Zheng).
- ACPI EC driver fix related to serialized evaluations of _Qxx
methods and ACPI tools updates allowing the EC userspace tool to be
built from the kernel source (Lv Zheng).
- ACPI processor driver updates preparing it for future introduction
of CPPC support and ACPI PCC mailbox driver updates (Ashwin
Chaugule).
- ACPI interrupts enumeration fix for a regression related to the
handling of IRQ attribute conflicts between MADT and the ACPI
namespace (Jiang Liu).
- Fixes related to ACPI device PM (Mika Westerberg, Srinidhi
Kasagar).
- ACPI device registration code reorganization to separate the
sysfs-related code and bus type operations from the rest (Rafael J
Wysocki).
- Assorted cleanups in the ACPI core (Jarkko Nikula, Mathias Krause,
Andy Shevchenko, Rafael J Wysocki, Nicolas Iooss).
- ACPI cpufreq driver and ia64 cpufreq driver fixes and cleanups (Pan
Xinhui, Rafael J Wysocki).
- cpufreq core cleanups on top of the previous changes allowing it to
preseve its sysfs directories over system suspend/resume (Viresh
Kumar, Rafael J Wysocki, Sebastian Andrzej Siewior).
- cpufreq fixes and cleanups related to governors (Viresh Kumar).
- cpufreq updates (core and the cpufreq-dt driver) related to the
turbo/boost mode support (Viresh Kumar, Bartlomiej Zolnierkiewicz).
- New DT bindings for Operating Performance Points (OPP), support for
them in the OPP framework and in the cpufreq-dt driver plus related
OPP framework fixes and cleanups (Viresh Kumar).
- cpufreq powernv driver updates (Shilpasri G Bhat).
- New cpufreq driver for Mediatek MT8173 (Pi-Cheng Chen).
- Assorted cpufreq driver (speedstep-lib, sfi, integrator) cleanups
and fixes (Abhilash Jindal, Andrzej Hajda, Cristian Ardelean).
- intel_pstate driver updates including Skylake-S support, support
for enabling HW P-states per CPU and an additional vendor bypass
list entry (Kristen Carlson Accardi, Chen Yu, Ethan Zhao).
- cpuidle core fixes related to the handling of coupled idle states
(Xunlei Pang).
- intel_idle driver updates including Skylake Client support and
support for freeze-mode-specific idle states (Len Brown).
- Driver core updates related to power management (Andy Shevchenko,
Rafael J Wysocki).
- Generic power domains framework fixes and cleanups (Jon Hunter,
Geert Uytterhoeven, Rajendra Nayak, Ulf Hansson).
- Device PM QoS framework update to allow the latency tolerance
setting to be exposed to user space via sysfs (Mika Westerberg).
- devfreq support for PPMUv2 in Exynos5433 and a fix for an incorrect
exynos-ppmu DT binding (Chanwoo Choi, Javier Martinez Canillas).
- System sleep support updates (Alan Stern, Len Brown, SungEun Kim).
- rockchip-io AVS support updates (Heiko Stuebner).
- PM core clocks support fixup (Colin Ian King).
- Power capping RAPL driver update including support for Skylake H/S
and Broadwell-H (Radivoje Jovanovic, Seiichi Ikarashi).
- Generic device properties framework fixes related to the handling
of static (driver-provided) property sets (Andy Shevchenko).
- turbostat and cpupower updates (Len Brown, Shilpasri G Bhat,
Shreyas B Prabhu)"
* tag 'pm+acpi-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (180 commits)
cpufreq: speedstep-lib: Use monotonic clock
cpufreq: powernv: Increase the verbosity of OCC console messages
cpufreq: sfi: use kmemdup rather than duplicating its implementation
cpufreq: drop !cpufreq_driver check from cpufreq_parse_governor()
cpufreq: rename cpufreq_real_policy as cpufreq_user_policy
cpufreq: remove redundant 'policy' field from user_policy
cpufreq: remove redundant 'governor' field from user_policy
cpufreq: update user_policy.* on success
cpufreq: use memcpy() to copy policy
cpufreq: remove redundant CPUFREQ_INCOMPATIBLE notifier event
cpufreq: mediatek: Add MT8173 cpufreq driver
dt-bindings: mediatek: Add MT8173 CPU DVFS clock bindings
PM / Domains: Fix typo in description of genpd_dev_pm_detach()
PM / Domains: Remove unusable governor dummies
PM / Domains: Make pm_genpd_init() available to modules
PM / domains: Align column headers and data in pm_genpd_summary output
powercap / RAPL: disable the 2nd power limit properly
tools: cpupower: Fix error when running cpupower monitor
PM / OPP: Drop unlikely before IS_ERR(_OR_NULL)
PM / OPP: Fix static checker warning (broken 64bit big endian systems)
...
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Linus Torvalds
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a1d8561172 |
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"The biggest change in this cycle is the rewrite of the main SMP load
balancing metric: the CPU load/utilization. The main goal was to make
the metric more precise and more representative - see the changelog of
this commit for the gory details:
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Xunlei Pang
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4c1ed5a607 |
cpuidle/coupled: Remove redundant 'dev' argument of cpuidle_state_is_coupled()
For cpuidle_state_is_coupled(), 'dev' is not used, so remove it. Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Xunlei Pang
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ba6a860d41 |
cpuidle/coupled: Remove cpuidle_device::safe_state_index
cpuidle_device::safe_state_index need to be initialized before use, it should be the same as cpuidle_driver::safe_state_index. We tackled this issue by removing the safe_state_index from the cpuidle_device structure and use the one in the cpuidle_driver structure instead. Suggested-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Mark Rutland
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be120397e7 |
ARM: migrate to common PSCI client code
Now that the common PSCI client code has been factored out to drivers/firmware, and made safe for 32-bit use, move the 32-bit ARM code over to it. This results in a moderate reduction of duplicated lines, and will prevent further duplication as the PSCI client code is updated for PSCI 1.0 and beyond. The two legacy platform users of the PSCI invocation code are updated to account for interface changes. In both cases the power state parameter (which is constant) is now generated using macros, so that the pack/unpack logic can be killed in preparation for PSCI 1.0 power state changes. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Rob Herring <robh@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Ashwin Chaugule <ashwin.chaugule@linaro.org> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> |
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Lucas Stach
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63caae8480 |
sched/idle: Move latency tracing stop/start calls deeper inside the idle loop
Make sure to stop tracing only once we are past a point where all latency tracing events have been processed (irqs are not enabled again). This has the slight advantage of capturing more latency related events in the idle path, but most importantly it makes sure that latency tracing doesn't get re-enabled inadvertently when new events are coming in. This makes the irqsoff latency tracer useful again, as we stop capturing CPU sleep time as IRQ latency. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kernel@pengutronix.de Cc: patchwork-lst@pengutronix.de Link: http://lkml.kernel.org/r/1437410090-3747-1-git-send-email-l.stach@pengutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Rafael J. Wysocki
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ae0afb4f5d |
suspend-to-idle: Prevent RCU from complaining about tick_freeze()
Put tick_freeze() under RCU_NONIDLE() to prevent RCU from complaining about suspicious RCU usage in idle by trace_suspend_resume() called from there. While at it, fix a comment related to another usage of RCU_NONIDLE() in enter_freeze_proper(). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> |
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Linus Torvalds
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75462c8a87 |
Replace module_platform_driver with builtin_platform driver in non modules.
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Merge tag 'module-builtin_driver-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
Pull module_platform_driver replacement from Paul Gortmaker:
"Replace module_platform_driver with builtin_platform driver in non
modules.
We see an increasing number of non-modular drivers using
modular_driver() type register functions. There are several downsides
to letting this continue unchecked:
- The code can appear modular to a reader of the code, and they won't
know if the code really is modular without checking the Makefile
and Kconfig to see if compilation is governed by a bool or
tristate.
- Coders of drivers may be tempted to code up an __exit function that
is never used, just in order to satisfy the required three args of
the modular registration function.
- Non-modular code ends up including the <module.h> which increases
CPP overhead that they don't need.
- It hinders us from performing better separation of the module init
code and the generic init code.
So here we introduce similar macros for builtin drivers. Then we
convert builtin drivers (controlled by a bool Kconfig) by making the
following type of mapping:
module_platform_driver() ---> builtin_platform_driver()
module_platform_driver_probe() ---> builtin_platform_driver_probe().
The set of drivers that are converted here are just the ones that
showed up as relying on an implicit include of <module.h> during a
pending header cleanup. So we convert them here vs adding an include
of <module.h> to non-modular code to avoid compile fails. Additonal
conversions can be done asynchronously at any time.
Once again, an unused module_exit function that is removed here
appears in the diffstat as an outlier wrt all the other changes"
* tag 'module-builtin_driver-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
drivers/clk: convert sunxi/clk-mod0.c to use builtin_platform_driver
drivers/power: Convert non-modular syscon-reboot to use builtin_platform_driver
drivers/soc: Convert non-modular soc-realview to use builtin_platform_driver
drivers/soc: Convert non-modular tegra/pmc to use builtin_platform_driver
drivers/cpufreq: Convert non-modular s5pv210-cpufreq.c to use builtin_platform_driver
drivers/cpuidle: Convert non-modular drivers to use builtin_platform_driver
drivers/platform: Convert non-modular pdev_bus to use builtin_platform_driver
platform_device: better support builtin boilerplate avoidance
|
|
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Linus Torvalds
|
5c3950970b |
Power management and ACPI fixes for v4.2-rc1
- Fix a recently added memory leak in an error path in the ACPI
resources management code (Dan Carpenter).
- Fix a build warning triggered by an ACPI video header function
that should be static inline (Borislav Petkov).
- Change names of helper function converting struct fwnode_handle
pointers to either struct device_node or struct acpi_device
pointers so they don't conflict with local variable names
(Alexander Sverdlin).
- Make the hibernate core re-enable nonboot CPUs on failures to
disable them as expected (Vitaly Kuznetsov).
- Increase the default timeout of the device suspend watchdog to
prevent it from triggering too early on some systems (Takashi Iwai).
- Prevent the cpuidle powernv driver from registering idle
states with CPUIDLE_FLAG_TIMER_STOP set if CONFIG_TICK_ONESHOT
is unset which leads to boot hangs (Preeti U Murthy).
/
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Merge tag 'pm+acpi-4.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"These are fixes that didn't make it to the previous PM+ACPI pull
request or are fixing issues introduced by it.
Specifics:
- Fix a recently added memory leak in an error path in the ACPI
resources management code (Dan Carpenter)
- Fix a build warning triggered by an ACPI video header function that
should be static inline (Borislav Petkov)
- Change names of helper function converting struct fwnode_handle
pointers to either struct device_node or struct acpi_device
pointers so they don't conflict with local variable names
(Alexander Sverdlin)
- Make the hibernate core re-enable nonboot CPUs on failures to
disable them as expected (Vitaly Kuznetsov)
- Increase the default timeout of the device suspend watchdog to
prevent it from triggering too early on some systems (Takashi Iwai)
- Prevent the cpuidle powernv driver from registering idle states
with CPUIDLE_FLAG_TIMER_STOP set if CONFIG_TICK_ONESHOT is unset
which leads to boot hangs (Preeti U Murthy)"
* tag 'pm+acpi-4.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
tick/idle/powerpc: Do not register idle states with CPUIDLE_FLAG_TIMER_STOP set in periodic mode
PM / sleep: Increase default DPM watchdog timeout to 60
PM / hibernate: re-enable nonboot cpus on disable_nonboot_cpus() failure
ACPI / OF: Rename of_node() and acpi_node() to to_of_node() and to_acpi_node()
ACPI / video: Inline acpi_video_set_dmi_backlight_type
ACPI / resources: free memory on error in add_region_before()
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|
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Linus Torvalds
|
e8a0b37d28 |
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King:
"Bigger items included in this update are:
- A series of updates from Arnd for ARM randconfig build failures
- Updates from Dmitry for StrongARM SA-1100 to move IRQ handling to
drivers/irqchip/
- Move ARMs SP804 timer to drivers/clocksource/
- Perf updates from Mark Rutland in preparation to move the ARM perf
code into drivers/ so it can be shared with ARM64.
- MCPM updates from Nicolas
- Add support for taking platform serial number from DT
- Re-implement Keystone2 physical address space switch to conform to
architecture requirements
- Clean up ARMv7 LPAE code, which goes in hand with the Keystone2
changes.
- L2C cleanups to avoid unlocking caches if we're prevented by the
secure support to unlock.
- Avoid cleaning a potentially dirty cache containing stale data on
CPU initialisation
- Add ARM-only entry point for secondary startup (for machines that
can only call into a Thumb kernel in ARM mode). Same thing is also
done for the resume entry point.
- Provide arch_irqs_disabled via asm-generic
- Enlarge ARMv7M vector table
- Always use BFD linker for VDSO, as gold doesn't accept some of the
options we need.
- Fix an incorrect BSYM (for Thumb symbols) usage, and convert all
BSYM compiler macros to a "badr" (for branch address).
- Shut up compiler warnings provoked by our cmpxchg() implementation.
- Ensure bad xchg sizes fail to link"
* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (75 commits)
ARM: Fix build if CLKDEV_LOOKUP is not configured
ARM: fix new BSYM() usage introduced via for-arm-soc branch
ARM: 8383/1: nommu: avoid deprecated source register on mov
ARM: 8391/1: l2c: add options to overwrite prefetching behavior
ARM: 8390/1: irqflags: Get arch_irqs_disabled from asm-generic
ARM: 8387/1: arm/mm/dma-mapping.c: Add arm_coherent_dma_mmap
ARM: 8388/1: tcm: Don't crash when TCM banks are protected by TrustZone
ARM: 8384/1: VDSO: force use of BFD linker
ARM: 8385/1: VDSO: group link options
ARM: cmpxchg: avoid warnings from macro-ized cmpxchg() implementations
ARM: remove __bad_xchg definition
ARM: 8369/1: ARMv7M: define size of vector table for Vybrid
ARM: 8382/1: clocksource: make ARM_TIMER_SP804 depend on GENERIC_SCHED_CLOCK
ARM: 8366/1: move Dual-Timer SP804 driver to drivers/clocksource
ARM: 8365/1: introduce sp804_timer_disable and remove arm_timer.h inclusion
ARM: 8364/1: fix BE32 module loading
ARM: 8360/1: add secondary_startup_arm prototype in header file
ARM: 8359/1: correct secondary_startup_arm mode
ARM: proc-v7: sanitise and document registers around errata
ARM: proc-v7: clean up MIDR access
...
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Rafael J. Wysocki
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132c242d95 |
Merge branches 'acpi-video', 'device-properties', 'pm-sleep' and 'pm-cpuidle'
* acpi-video: ACPI / video: Inline acpi_video_set_dmi_backlight_type * device-properties: ACPI / OF: Rename of_node() and acpi_node() to to_of_node() and to_acpi_node() * pm-sleep: PM / sleep: Increase default DPM watchdog timeout to 60 PM / hibernate: re-enable nonboot cpus on disable_nonboot_cpus() failure * pm-cpuidle: tick/idle/powerpc: Do not register idle states with CPUIDLE_FLAG_TIMER_STOP set in periodic mode |
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preeti
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cc5a2f7b8f |
tick/idle/powerpc: Do not register idle states with CPUIDLE_FLAG_TIMER_STOP set in periodic mode
On some archs, the local clockevent device stops in deep cpuidle states. The broadcast framework is used to wakeup cpus in these idle states, in which either an external clockevent device is used to send wakeup ipis or the hrtimer broadcast framework kicks in in the absence of such a device. One cpu is nominated as the broadcast cpu and this cpu sends wakeup ipis to sleeping cpus at the appropriate time. This is the implementation in the oneshot mode of broadcast. In periodic mode of broadcast however, the presence of such cpuidle states results in the cpuidle driver calling tick_broadcast_enable() which shuts down the local clockevent devices of all the cpus and appoints the tick broadcast device as the clockevent device for each of them. This works on those archs where the tick broadcast device is a real clockevent device. But on archs which depend on the hrtimer mode of broadcast, the tick broadcast device hapens to be a pseudo device. The consequence is that the local clockevent devices of all cpus are shutdown and the kernel hangs at boot time in periodic mode. Let us thus not register the cpuidle states which have CPUIDLE_FLAG_TIMER_STOP flag set, on archs which depend on the hrtimer mode of broadcast in periodic mode. This patch takes care of doing this on powerpc. The cpus would not have entered into such deep cpuidle states in periodic mode on powerpc anyway. So there is no loss here. Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Cc: 3.19+ <stable@vger.kernel.org> # 3.19+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Rafael J. Wysocki
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d461003574 |
Merge branch 'pm-cpuidle'
* pm-cpuidle: cpuidle: powernv/pseries: Auto-promotion of snooze to deeper idle state |
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Shilpasri G Bhat
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78eaa10f02 |
cpuidle: powernv/pseries: Auto-promotion of snooze to deeper idle state
The idle cpus which stay in snooze for a long period can degrade the perfomance of the sibling cpus. If the cpu stays in snooze for more than target residency of the next available idle state, then exit from snooze. This gives a chance to the cpuidle governor to re-evaluate the last idle state of the cpu to promote it to deeper idle states. Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Rafael J. Wysocki
|
ab232ba570 |
Merge branches 'pm-sleep' and 'pm-runtime'
* pm-sleep: PM / sleep: trace_device_pm_callback coverage in dpm_prepare/complete PM / wakeup: add a dummy wakeup_source to record statistics PM / sleep: Make suspend-to-idle-specific code depend on CONFIG_SUSPEND PM / sleep: Return -EBUSY from suspend_enter() on wakeup detection PM / tick: Add tracepoints for suspend-to-idle diagnostics PM / sleep: Fix symbol name in a comment in kernel/power/main.c leds / PM: fix hibernation on arm when gpio-led used with CPU led trigger ARM: omap-device: use SET_NOIRQ_SYSTEM_SLEEP_PM_OPS bus: omap_l3_noc: add missed callbacks for suspend-to-disk PM / sleep: Add macro to define common noirq system PM callbacks PM / sleep: Refine diagnostic messages in enter_state() PM / wakeup: validate wakeup source before activating it. * pm-runtime: PM / Runtime: Update last_busy in rpm_resume PM / runtime: add note about re-calling in during device probe() |
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Paul Gortmaker
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090d1cf103 |
drivers/cpuidle: Convert non-modular drivers to use builtin_platform_driver
All these drivers are configured with Kconfig options that are declared as bool. Hence it is not possible for the code to be built as modular. However the code is currently using the module_platform_driver() macro for driver registration. While this currently works, we really don't want to be including the module.h header in non-modular code, which we'll be forced to do, pending some upcoming code relocation from init.h into module.h. So we fix it now by using the non-modular equivalent. Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Michal Simek <michal.simek@xilinx.com> Cc: linux-pm@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
|
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Rafael J. Wysocki
|
7d51d97925 |
cpuidle: Do not use CPUIDLE_DRIVER_STATE_START in cpuidle.c
The CPUIDLE_DRIVER_STATE_START symbol is defined as 1 only if CONFIG_ARCH_HAS_CPU_RELAX is set, otherwise it is defined as 0. However, if CONFIG_ARCH_HAS_CPU_RELAX is set, the first (index 0) entry in the cpuidle driver's table of states is overwritten with the default "poll" entry by the core. The "state" defined by the "poll" entry doesn't provide ->enter_dead and ->enter_freeze callbacks and its exit_latency is 0. For this reason, it is not necessary to use CPUIDLE_DRIVER_STATE_START in cpuidle_play_dead() (->enter_dead is NULL, so the "poll state" will be skipped by the loop). It also is arguably unuseful to return states with exit_latency equal to 0 from find_deepest_state(), so the function can be modified to start the loop from index 0 and the "poll state" will be skipped by it as a result of the check against latency_req. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> |
|
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Rafael J. Wysocki
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87e9b9f1d8 |
PM / sleep: Make suspend-to-idle-specific code depend on CONFIG_SUSPEND
Since idle_should_freeze() is defined to always return 'false' for CONFIG_SUSPEND unset, all of the code depending on it in cpuidle_idle_call() is not necessary in that case. Make that code depend on CONFIG_SUSPEND too to avoid building it when it is not going to be used. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> |
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Rafael J. Wysocki
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0d94039fab |
cpuidle: Select a different state on tick_broadcast_enter() failures
If tick_broadcast_enter() fails in cpuidle_enter_state(), try to find another idle state to enter instead of invoking default_idle_call() immediately and returning -EBUSY which should increase the chances of saving some energy in those cases. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Kevin Hilman <khilman@linaro.org> |
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Rafael J. Wysocki
|
827a5aefc5 |
sched / idle: Call default_idle_call() from cpuidle_enter_state()
The check of the cpuidle_enter() return value against -EBUSY made in call_cpuidle() will not be necessary any more if cpuidle_enter_state() calls default_idle_call() directly when it is about to return -EBUSY, so make that happen and eliminate the check. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Kevin Hilman <khilman@linaro.org> |
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Rafael J. Wysocki
|
faad384928 |
sched / idle: Call idle_set_state() from cpuidle_enter_state()
Introduce a wrapper function around idle_set_state() called sched_idle_set_state() that will pass this_rq() to it as the first argument and make cpuidle_enter_state() call the new function before and after entering the target state. At the same time, remove direct invocations of idle_set_state() from call_cpuidle(). This will allow the invocation of default_idle_call() to be moved from call_cpuidle() to cpuidle_enter_state() safely and call_cpuidle() to be simplified a bit as a result. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Kevin Hilman <khilman@linaro.org> |
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Rafael J. Wysocki
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7312280bd2 |
cpuidle: Fix the kerneldoc comment for cpuidle_enter_state()
The kerneldoc comment for cpuidle_enter_state() doesn't match the function's header any more, so fix it. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Nicolas Pitre
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7895f73169 |
ARM: MCPM: remove residency argument from mcpm_cpu_suspend()
This is currently unused. If a suspend must be limited to CPU level only by preventing the last man from triggering a cluster level suspend then this should be determined according to many other criteria the MCPM layer is currently not aware of. It is unlikely that mcpm_cpu_suspend() would be the proper conduit for that information anyway. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Dave Martin <Dave.Martin@arm.com> |
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Rafael J. Wysocki
|
a802ea9645 |
cpuidle: Check the sign of index in cpuidle_reflect()
Avoid calling the governor's ->reflect method if the state index passed to cpuidle_reflect() is negative. This allows the analogous check to be dropped from menu_reflect(), so do that too, and ensures that arbitrary error codes can be passed to cpuidle_reflect() as the index with no adverse consequences. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> |
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Rafael J. Wysocki
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df8d9eeadd |
cpuidle: Run tick_broadcast_exit() with disabled interrupts
Commit |
|
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Linus Torvalds
|
38eb1dbb0d |
ARM: SoC fixes for v4.1
Here's the usual "low-priority fixes that didn't make it into the last
few -rcs, with a twist: We had a fixes pull request that I didn't send
in time to get into 4.0, so we'll send some of them to Greg for -stable as
well.
Contents here is as usual not all that controversial:
- A handful of randconfig fixes from Arnd, in particular for older Samsung
platforms
- Exynos fixes, !SMP building, DTS updates for MMC and lid switch
- Kbuild fix to create output subdirectory for DTB files
- Misc minor fixes for OMAP
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Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Here's the usual "low-priority fixes that didn't make it into the last
few -rcs, with a twist: We had a fixes pull request that I didn't send
in time to get into 4.0, so we'll send some of them to Greg for
-stable as well.
Contents here is as usual not all that controversial:
- a handful of randconfig fixes from Arnd, in particular for older
Samsung platforms
- Exynos fixes, !SMP building, DTS updates for MMC and lid switch
- Kbuild fix to create output subdirectory for DTB files
- misc minor fixes for OMAP"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (23 commits)
ARM: at91/dt: sama5d3 xplained: add phy address for macb1
kbuild: Create directory for target DTB
ARM: mvebu: Disable CPU Idle on Armada 38x
ARM: DRA7: Enable Cortex A15 errata 798181
ARM: dts: am57xx-beagle-x15: Add thermal map to include fan and tmp102
ARM: dts: DRA7: Add bandgap and related thermal nodes
bus: ocp2scp: SYNC2 value should be changed to 0x6
ARM: dts: am4372: Add "ti,am437x-ocp2scp" as compatible string for OCP2SCP
ARM: OMAP2+: remove superfluous NULL pointer check
ARM: EXYNOS: Fix build breakage cpuidle on !SMP
ARM: dts: fix lid and power pin-functions for exynos5250-spring
ARM: dts: fix mmc node updates for exynos5250-spring
ARM: OMAP4: remove dead kconfig option OMAP4_ERRATA_I688
MAINTAINERS: add OMAP defconfigs under OMAP SUPPORT
ARM: OMAP1: PM: fix some build warnings on 1510-only Kconfigs
ARM: cns3xxx: don't export static symbol
ARM: S3C24XX: avoid a Kconfig warning
ARM: S3C24XX: fix header file inclusions
ARM: S3C24XX: fix building without PM_SLEEP
ARM: S3C24XX: use SAMSUNG_WAKEMASK for s3c2416
...
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Linus Torvalds
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6496edfce9 |
This is the final removal (after several years!) of the obsolete cpus_*
functions, prompted by their mis-use in staging. With these function removed, all cpu functions should only iterate to nr_cpu_ids, so we finally only allocate that many bits when cpumasks are allocated offstack. Thanks, Rusty. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJVNPMuAAoJENkgDmzRrbjx7ZIP/j65e6xs1jEyXR3WOYSdTU1x bMo6JcII6O1oEZLgyKXgx9KiBg6uIIDta1NG/H/XIe354dwfHVsHvj5HHHQR5Xof iRrjLOaHj4XglI3hvsk0eEEl3/OBBLgyo9bUwDvMF1fmr/9tW4caMs3Op6n7Evzm YIvoAyeJ0A8BfEtOU5lXhcVIGmnHtSw0x6mdGXpXIBmWYQPCtdQP868s4lnl44w0 bSNpAYdzEqg64Ph3SK0prgWPrn5+5EiaAhV7HZzENZ5+o0DAdIXWq/W7uHyCWPKH 536cJDojec+nSUQkPYngngGprxrKO02aBcMw/3JGJ0tdCDj8yw3XAyVAFzz4hmMb Lkmyv4QHHIILLvJ4ZRH5KHWCjjVBg41LNCs2H3HnoxFACdm0lZYKHsUAh2ucBVtU Wb/eHmLxOG43UIkpX4yrhy3SfE1ZdnOVzEzOzPXtr51t8ojqk+bLFe/hJ6EkzrQX X+90qHfBq+PMJlAnc3zdXHjxoJrL6KPWVwVvFrNeibgEKtVvy/BiwZkS6QceC1Ea TatOYA5r6awFVHHQCooN1DGAxN5Juvu2SmdnTUA9ymsCNDghj1YUoAKRNP81u8Sa pe3hco/63iCuPna+vlwNDU6SgsaMk9m0p+1n1BiDIfVJIkWYCNeG+u2gQkzbDKlQ AJuKKQv1QuZiF0ylZ0wq =VAgA -----END PGP SIGNATURE----- Merge tag 'cpumask-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull final removal of deprecated cpus_* cpumask functions from Rusty Russell: "This is the final removal (after several years!) of the obsolete cpus_* functions, prompted by their mis-use in staging. With these function removed, all cpu functions should only iterate to nr_cpu_ids, so we finally only allocate that many bits when cpumasks are allocated offstack" * tag 'cpumask-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (25 commits) cpumask: remove __first_cpu / __next_cpu cpumask: resurrect CPU_MASK_CPU0 linux/cpumask.h: add typechecking to cpumask_test_cpu cpumask: only allocate nr_cpumask_bits. Fix weird uses of num_online_cpus(). cpumask: remove deprecated functions. mips: fix obsolete cpumask_of_cpu usage. x86: fix more deprecated cpu function usage. ia64: remove deprecated cpus_ usage. powerpc: fix deprecated CPU_MASK_CPU0 usage. CPU_MASK_ALL/CPU_MASK_NONE: remove from deprecated region. staging/lustre/o2iblnd: Don't use cpus_weight staging/lustre/libcfs: replace deprecated cpus_ calls with cpumask_ staging/lustre/ptlrpc: Do not use deprecated cpus_* functions blackfin: fix up obsolete cpu function usage. parisc: fix up obsolete cpu function usage. tile: fix up obsolete cpu function usage. arm64: fix up obsolete cpu function usage. mips: fix up obsolete cpu function usage. x86: fix up obsolete cpu function usage. ... |
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Javi Merino
|
ee3c86f356 |
cpuidle: menu: use DIV_ROUND_CLOSEST_ULL()
Now that the kernel provides DIV_ROUND_CLOSEST_ULL(), drop the internal implementation and use the kernel one. Signed-off-by: Javi Merino <javi.merino@arm.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
|
2481bc7528 |
Power management and ACPI updates for v4.1-rc1
- Generic PM domains support update including new PM domain
callbacks to handle device initialization better (Russell King,
Rafael J Wysocki, Kevin Hilman).
- Unified device properties API update including a new mechanism
for accessing data provided by platform initialization code
(Rafael J Wysocki, Adrian Hunter).
- ARM cpuidle update including ARM32/ARM64 handling consolidation
(Daniel Lezcano).
- intel_idle update including support for the Silvermont Core in
the Baytrail SOC and for the Airmont Core in the Cherrytrail and
Braswell SOCs (Len Brown, Mathias Krause).
- New cpufreq driver for Hisilicon ACPU (Leo Yan).
- intel_pstate update including support for the Knights Landing
chip (Dasaratharaman Chandramouli, Kristen Carlson Accardi).
- QorIQ cpufreq driver update (Tang Yuantian, Arnd Bergmann).
- powernv cpufreq driver update (Shilpasri G Bhat).
- devfreq update including Tegra support changes (Tomeu Vizoso,
MyungJoo Ham, Chanwoo Choi).
- powercap RAPL (Running-Average Power Limit) driver update
including support for Intel Broadwell server chips (Jacob Pan,
Mathias Krause).
- ACPI device enumeration update related to the handling of the
special PRP0001 device ID allowing DT-style 'compatible' property
to be used for ACPI device identification (Rafael J Wysocki).
- ACPI EC driver update including limited _DEP support (Lan Tianyu,
Lv Zheng).
- ACPI backlight driver update including a new mechanism to allow
native backlight handling to be forced on non-Windows 8 systems
and a new quirk for Lenovo Ideapad Z570 (Aaron Lu, Hans de Goede).
- New Windows Vista compatibility quirk for Sony VGN-SR19XN (Chen Yu).
- Assorted ACPI fixes and cleanups (Aaron Lu, Martin Kepplinger,
Masanari Iida, Mika Westerberg, Nan Li, Rafael J Wysocki).
- Fixes related to suspend-to-idle for the iTCO watchdog driver and
the ACPI core system suspend/resume code (Rafael J Wysocki, Chen Yu).
- PM tracing support for the suspend phase of system suspend/resume
transitions (Zhonghui Fu).
- Configurable delay for the system suspend/resume testing facility
(Brian Norris).
- PNP subsystem cleanups (Peter Huewe, Rafael J Wysocki).
/
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Merge tag 'pm+acpi-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI updates from Rafael Wysocki:
"These are mostly fixes and cleanups all over, although there are a few
items that sort of fall into the new feature category.
First off, we have new callbacks for PM domains that should help us to
handle some issues related to device initialization in a better way.
There also is some consolidation in the unified device properties API
area allowing us to use that inferface for accessing data coming from
platform initialization code in addition to firmware-provided data.
We have some new device/CPU IDs in a few drivers, support for new
chips and a new cpufreq driver too.
Specifics:
- Generic PM domains support update including new PM domain callbacks
to handle device initialization better (Russell King, Rafael J
Wysocki, Kevin Hilman)
- Unified device properties API update including a new mechanism for
accessing data provided by platform initialization code (Rafael J
Wysocki, Adrian Hunter)
- ARM cpuidle update including ARM32/ARM64 handling consolidation
(Daniel Lezcano)
- intel_idle update including support for the Silvermont Core in the
Baytrail SOC and for the Airmont Core in the Cherrytrail and
Braswell SOCs (Len Brown, Mathias Krause)
- New cpufreq driver for Hisilicon ACPU (Leo Yan)
- intel_pstate update including support for the Knights Landing chip
(Dasaratharaman Chandramouli, Kristen Carlson Accardi)
- QorIQ cpufreq driver update (Tang Yuantian, Arnd Bergmann)
- powernv cpufreq driver update (Shilpasri G Bhat)
- devfreq update including Tegra support changes (Tomeu Vizoso,
MyungJoo Ham, Chanwoo Choi)
- powercap RAPL (Running-Average Power Limit) driver update including
support for Intel Broadwell server chips (Jacob Pan, Mathias Krause)
- ACPI device enumeration update related to the handling of the
special PRP0001 device ID allowing DT-style 'compatible' property
to be used for ACPI device identification (Rafael J Wysocki)
- ACPI EC driver update including limited _DEP support (Lan Tianyu,
Lv Zheng)
- ACPI backlight driver update including a new mechanism to allow
native backlight handling to be forced on non-Windows 8 systems and
a new quirk for Lenovo Ideapad Z570 (Aaron Lu, Hans de Goede)
- New Windows Vista compatibility quirk for Sony VGN-SR19XN (Chen Yu)
- Assorted ACPI fixes and cleanups (Aaron Lu, Martin Kepplinger,
Masanari Iida, Mika Westerberg, Nan Li, Rafael J Wysocki)
- Fixes related to suspend-to-idle for the iTCO watchdog driver and
the ACPI core system suspend/resume code (Rafael J Wysocki, Chen Yu)
- PM tracing support for the suspend phase of system suspend/resume
transitions (Zhonghui Fu)
- Configurable delay for the system suspend/resume testing facility
(Brian Norris)
- PNP subsystem cleanups (Peter Huewe, Rafael J Wysocki)"
* tag 'pm+acpi-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (74 commits)
ACPI / scan: Fix NULL pointer dereference in acpi_companion_match()
ACPI / scan: Rework modalias creation when "compatible" is present
intel_idle: mark cpu id array as __initconst
powercap / RAPL: mark rapl_ids array as __initconst
powercap / RAPL: add ID for Broadwell server
intel_pstate: Knights Landing support
intel_pstate: remove MSR test
cpufreq: fix qoriq uniprocessor build
ACPI / scan: Take the PRP0001 position in the list of IDs into account
ACPI / scan: Simplify acpi_match_device()
ACPI / scan: Generalize of_compatible matching
device property: Introduce firmware node type for platform data
device property: Make it possible to use secondary firmware nodes
PM / watchdog: iTCO: stop watchdog during system suspend
cpufreq: hisilicon: add acpu driver
ACPI / EC: Call acpi_walk_dep_device_list() after installing EC opregion handler
cpufreq: powernv: Report cpu frequency throttling
intel_idle: Add support for the Airmont Core in the Cherrytrail and Braswell SOCs
intel_idle: Update support for Silvermont Core in Baytrail SOC
PM / devfreq: tegra: Register governor on module init
...
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Linus Torvalds
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7fd56474db |
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Ingo Molnar:
"The main changes in this cycle were:
- clockevents state machine cleanups and enhancements (Viresh Kumar)
- clockevents broadcast notifier horror to state machine conversion
and related cleanups (Thomas Gleixner, Rafael J Wysocki)
- clocksource and timekeeping core updates (John Stultz)
- clocksource driver updates and fixes (Ben Dooks, Dmitry Osipenko,
Hans de Goede, Laurent Pinchart, Maxime Ripard, Xunlei Pang)
- y2038 fixes (Xunlei Pang, John Stultz)
- NMI-safe ktime_get_raw_fast() and general refactoring of the clock
code, in preparation to perf's per event clock ID support (Peter
Zijlstra)
- generic sched/clock fixes, optimizations and cleanups (Daniel
Thompson)
- clockevents cpu_down() race fix (Preeti U Murthy)"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (94 commits)
timers/PM: Drop unnecessary braces from tick_freeze()
timers/PM: Fix up tick_unfreeze()
timekeeping: Get rid of stale comment
clockevents: Cleanup dead cpu explicitely
clockevents: Make tick handover explicit
clockevents: Remove broadcast oneshot control leftovers
sched/idle: Use explicit broadcast oneshot control function
ARM: Tegra: Use explicit broadcast oneshot control function
ARM: OMAP: Use explicit broadcast oneshot control function
intel_idle: Use explicit broadcast oneshot control function
ACPI/idle: Use explicit broadcast control function
ACPI/PAD: Use explicit broadcast oneshot control function
x86/amd/idle, clockevents: Use explicit broadcast oneshot control functions
clockevents: Provide explicit broadcast oneshot control functions
clockevents: Remove the broadcast control leftovers
ARM: OMAP: Use explicit broadcast control function
intel_idle: Use explicit broadcast control function
cpuidle: Use explicit broadcast control function
ACPI/processor: Use explicit broadcast control function
ACPI/PAD: Use explicit broadcast control function
...
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Rafael J. Wysocki
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cdde51b9fe | Merge back earlier cpuidle material for v4.1. | |
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Olof Johansson
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03a1e74cad |
Samsung 2nd fixes for v4.0
- Fix build breakage exynos cpuidle driver on !SMP because it is coupled built-in so added check for SMP. - Fix lid, power pin-functions and mmc node updates for exynos5250-spring: Fixes commit ID |
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Bartlomiej Zolnierkiewicz
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d75e4af14e |
cpuidle: remove state_count field from struct cpuidle_device
Thomas Schlichter reports the following issue on his Samsung NC20:
"The C-states C1 and C2 to the OS when connected to AC, and additionally
provides the C3 C-state when disconnected from AC. However, the number
of C-states shown in sysfs is fixed to the number of C-states present
at boot.
If I boot with AC connected, I always only see the C-states up to C2
even if I disconnect AC.
The reason is commit
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Thomas Gleixner
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ee7a1438b5 |
cpuidle: Use explicit broadcast control function
Replace the clockevents_notify() call with an explicit function call. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/2106401.cYdJzzA6Ic@vostro.rjw.lan Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Daniel Lezcano
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a0d46a3dfd |
ARM: cpuidle: Register per cpuidle device
If the cpuidle init cpu operation returns -ENXIO, therefore reporting HW failure or misconfiguration, the CPUidle driver skips the respective cpuidle device initialization because the associated platform back-end HW is not operational. That prevents the system to crash and allows to handle the error gracefully. For example, on Qcom's platform, each core has a SPM. The device associated with this SPM is initialized before the cpuidle framework. If there is an error in the initialization (eg. error in the DT), the system continues to boot but in degraded mode as some SPM may not be correctly initialized. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> |
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Daniel Lezcano
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0e0870448a |
ARM: cpuidle: Enable the ARM64 driver for both ARM32/ARM64
ARM32 and ARM64 have the same DT definitions and the same approaches. The generic ARM cpuidle driver can be put in common for those two architectures. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Kevin Hilman <khilman@linaro.org> Acked-by: Rob Herring <robherring2@gmail.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> |
|
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Daniel Lezcano
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69e6cb3d2f |
ARM64: cpuidle: Remove arm64 reference
In the next patch, this driver will be common across ARM/ARM64. Remove all refs to ARM64 as it will be shared with ARM32. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Kevin Hilman <khilman@linaro.org> Acked-by: Rob Herring <robherring2@gmail.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> |
|
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Daniel Lezcano
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c9d6216149 |
ARM64: cpuidle: Rename cpu_init_idle to a common function name
With this change the cpuidle-arm64.c file calls the same function name for both ARM and ARM64. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Kevin Hilman <khilman@linaro.org> Acked-by: Rob Herring <robherring2@gmail.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> |
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Daniel Lezcano
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191de17aa3 |
ARM64: cpuidle: Replace cpu_suspend by the common ARM/ARM64 function
Call the common ARM/ARM64 'arm_cpuidle_suspend' instead of cpu_suspend function which is specific to ARM64. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Kevin Hilman <khilman@linaro.org> Acked-by: Rob Herring <robherring2@gmail.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> |
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Daniel Lezcano
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eeebc3bb4d |
ARM: cpuidle: Remove duplicate header inclusion
The cpu_do_idle() function is always used by the cpuidle drivers. That led to have each driver including cpuidle.h and proc-fns.h, they are always paired. That makes a lot of duplicate headers inclusion. Instead of including both in each .c file, move the proc-fns.h header inclusion in the cpuidle.h header file directly, so we can save some line of code. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Kevin Hilman <khilman@linaro.org> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> |
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Bartlomiej Zolnierkiewicz
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cfdda3535f |
ARM: EXYNOS: Fix build breakage cpuidle on !SMP
The Exynos cpuidle driver has coupled cpuidle built-in so it cannot be built without SMP: arch/arm/mach-exynos/pm.c: In function 'exynos_cpu0_enter_aftr': arch/arm/mach-exynos/pm.c:246:4: error: implicit declaration of function 'arch_send_wakeup_ipi_mask' [-Werror=implicit-function-declaration] arch/arm/mach-exynos/built-in.o: In function 'exynos_pre_enter_aftr': ../arch/arm/mach-exynos/pm.c:300: undefined reference to 'cpu_boot_reg_base' arch/arm/mach-exynos/built-in.o: In function 'exynos_cpu1_powerdown': ../arch/arm/mach-exynos/pm.c:282: undefined reference to 'exynos_cpu_power_down' Fix it by adding missing checks for SMP. Reported-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kukjin Kim <kgene@kernel.org> |
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Sebastien Rannou
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ce6031c89a |
cpuidle: mvebu: Update cpuidle thresholds for Armada XP SOCs
Originally, the thresholds used in the cpuidle driver for Armada SOCs
were temporarily chosen, leaving room for improvements.
This commit updates the thresholds for the Armada XP SOCs with values
that positively impact performances:
without patch with patch vendor kernel
- iperf localhost (gbit/sec) ~3.7 ~6.4 ~5.4
- ioping tmpfs (iops) ~163k ~206k ~179k
- ioping tmpfs (mib/s) ~636 ~805 ~699
The idle power consumption is negatively impacted (proportionally less
than the performance gain), and we are still performing better than
the vendor kernel here:
without patch with patch vendor kernel
- power consumption idle (W) ~2.4 ~3.2 ~4.4
- power consumption busy (W) ~8.6 ~8.3 ~8.6
There is still room for improvement regarding the value of these
thresholds, they were chosen to mimic the vendor kernel.
This patch only impacts Armada XP SOCs and was tested on Online Labs
C1 boards. A similar approach can be taken to improve the performances
of the Armada 370 and Armada 38x SOCs.
Thanks a lot to Thomas Petazzoni, Gregory Clement and Willy Tarreau
for the discussions and tips around this topic.
Signed-off-by: Sebastien Rannou <mxs@sbrk.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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Gregory CLEMENT
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43b68879de |
cpuidle: mvebu: Fix the CPU PM notifier usage
As stated in kernel/cpu_pm.c, "Platform is responsible for ensuring that cpu_pm_enter is not called twice on the same CPU before cpu_pm_exit is called.". In the current code in case of failure when calling mvebu_v7_cpu_suspend, the function cpu_pm_exit() is never called whereas cpu_pm_enter() was called just before. This patch moves the cpu_pm_exit() in order to balance the cpu_pm_enter() calls. Cc: stable@vger.kernel.org Reported-by: Fulvio Benini <fbf@libero.it> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Rafael J. Wysocki
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ef2b22ac54 |
cpuidle / sleep: Use broadcast timer for states that stop local timer
Commit |
|
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Rusty Russell
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f9b531fe14 |
drivers: fix up obsolete cpu function usage.
Thanks to spatch, plus manual removal of "&*". Then a sweep for for_each_cpu_mask => for_each_cpu. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: netdev@vger.kernel.org |
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Rafael J. Wysocki
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31a3409065 |
cpuidle / sleep: Do sanity checks in cpuidle_enter_freeze() too
Modify cpuidle_enter_freeze() to do the sanity checks done by
cpuidle_select() to avoid crashing the suspend-to-idle code
path in case something is missing.
Fixes:
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|
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Rafael J. Wysocki
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01e04f466e |
idle / sleep: Avoid excessive disabling and enabling interrupts
Disabling interrupts at the end of cpuidle_enter_freeze() is not useful, because its caller, cpuidle_idle_call(), re-enables them right away after invoking it. To avoid that unnecessary back and forth dance with interrupts, make cpuidle_enter_freeze() enable interrupts after calling enter_freeze_proper() and drop the local_irq_disable() at its end, so that all of the code paths in it end up with interrupts enabled. Then, cpuidle_idle_call() will not need to re-enable interrupts after calling cpuidle_enter_freeze() any more, because the latter will return with interrupts enabled, in analogy with cpuidle_enter(). Reported-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> |
|
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Rafael J. Wysocki
|
3466b547e3 |
Merge branches 'pnp', 'pm-cpuidle' and 'pm-cpufreq'
* pnp: PNP: Switch from __check_region() to __request_region() * pm-cpuidle: cpuidle: powernv: Avoid endianness conversions while parsing DT cpuidle: powernv: Read target_residency value of idle states from DT if available * pm-cpufreq: cpufreq: s3c: remove last use of resume_clocks callback cpufreq: s3c: remove incorrect __init annotations |
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Preeti U Murthy
|
70734a786a |
cpuidle: powernv: Avoid endianness conversions while parsing DT
We currently read the information about idle states from the DT so as to populate the cpuidle table. Use those APIs to read from the DT that can avoid endianness conversions of the property values in the cpuidle driver. Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Preeti U Murthy
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92c83ff5b4 |
cpuidle: powernv: Read target_residency value of idle states from DT if available
The device tree now exposes the residency values for different idle states. Read these values instead of calculating residency from the latency values. The values exposed in the DT are validated for optimal power efficiency. However to maintain compatibility with the older firmware code which does not expose residency values, use default values as a fallback mechanism. While at it, use better APIs to parse the powermgmt device tree node. Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Linus Torvalds
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99fa0ad92c |
Suspend-to-idle timer quiescing support for v3.20-rc1
Till now suspend-to-idle has not been able to save much more energy than runtime PM because of timer interrupts that periodically bring CPUs out of idle while they are waiting for a wakeup interrupt. Of course, the timer interrupts are not wakeup ones, so the handling of them can be deferred until a real wakeup interrupt happens, but at the same time we don't want to mass-expire timers at that point. The solution is to suspend the entire timekeeping when the last CPU is entering an idle state and resume it when the first CPU goes out of idle. That has to be done with care, though, so as to avoid accessing suspended clocksources etc. end we need extra support from idle drivers for that. This series of commits adds support for quiescing timers during suspend-to-idle and adds the requisite callbacks to intel_idle and the ACPI cpuidle driver. / -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAABCAAGBQJU4PNaAAoJEILEb/54YlRxgjsP/0UbDGbltVyM8VFhsobqhOni thKJTJsqWqYgsPfTufbOGyvP6zskbsarDlzCXoKXuHaynIqcxY8xfZvMdcQr1j0S nhKdqv4R6qlP3w2cFxXVZwhw21X3YO1zIxpi5Do1HdVuWoOvxq8Dk4cU8MrgOJC0 6ThC9Q7klheV4tY6Narlmmf6sX5O+S/EaqnupESSG4cqxNmlPw5AguLviBaUNVAY RSjUX8LAce05bOIGEpaFY+vUws+jlU7/T/GEajquEsGF9zalh2CsWso5nQvilxrJ 22MVqXUyHaXmTC+U7nV78qRkavR6zyr3v/JBDse56qRI1mFlmyvGh8mE5ukmpqJE Cg5rRC68o71xlBSVGhKW3Os2ks2Nenj2NLltrTyuh43OBJ691TaLsZnKh5nYt/MW MZdqRRjIDTMF+/P1u4wY8S63labrrmp7w4T720CgaZCLJ/9VfZQuqKXTTm2R5/II eDhFvdYXoP2748uUOn5sOr5/o0xhnMdaxykZZxE3IkSpOpIV1Mo2HWTIyDYXlILP 0OuJUUZFZtFOjWGCPn3YgoFT94C3nlO1vkXw//44okTUiUaaOZz+VWDF4fxdVeLR 8NGTe+/QzEq+2lbs+ZWRSM1hPukOntFcwCgWXFiqh9x2F00LAw9JpkiKBujxTjUV m2WstYaML3W7gBMyhxg0 =55Jb -----END PGP SIGNATURE----- Merge tag 'suspend-to-idle-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull suspend-to-idle updates from Rafael Wysocki: "Suspend-to-idle timer quiescing support for v3.20-rc1 Until now suspend-to-idle has not been able to save much more energy than runtime PM because of timer interrupts that periodically bring CPUs out of idle while they are waiting for a wakeup interrupt. Of course, the timer interrupts are not wakeup ones, so the handling of them can be deferred until a real wakeup interrupt happens, but at the same time we don't want to mass-expire timers at that point. The solution is to suspend the entire timekeeping when the last CPU is entering an idle state and resume it when the first CPU goes out of idle. That has to be done with care, though, so as to avoid accessing suspended clocksources etc. end we need extra support from idle drivers for that. This series of commits adds support for quiescing timers during suspend-to-idle and adds the requisite callbacks to intel_idle and the ACPI cpuidle driver" * tag 'suspend-to-idle-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI / idle: Implement ->enter_freeze callback routine intel_idle: Add ->enter_freeze callbacks PM / sleep: Make it possible to quiesce timers during suspend-to-idle timekeeping: Make it safe to use the fast timekeeper while suspended timekeeping: Pass readout base to update_fast_timekeeper() PM / sleep: Re-implement suspend-to-idle handling |
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Linus Torvalds
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18656782a8 |
ARM: SoC driver updates
These are changes for drivers that are intimately tied to some SoC and for some reason could not get merged through the respective subsystem maintainer tree. This time around, much of this is for at91, with the bulk of it being syscon and udc drivers. Also, there's: - coupled cpuidle support for Samsung Exynos4210 - Renesas 73A0 common-clk work - of/platform changes to tear down DMA mappings on device destruction - a few updates to the TI Keystone knav code -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJU4upSAAoJEIwa5zzehBx3HkUP/Rc4B1yZChNIFNfVq4dbei6w dT9WdFmxOIj2JLeXEypFBiNf1nSHmsxrZe9/IDACz2fYQOnaZZ6/786utUJP/PtC 2GDJy9cjL2Xh03We3nQp5z6J33XvpEni1t82cOpCl8wLBOQNnkjEks8UvLgi1LHW CNLcMm8JtDQ2aB/gRTjzetp9liZluESY5+Mig+loE2F/rzbMbNQDcWDDgUPyIQIS 1onL+Bad3BnGFdo/+qnkurGc81pxoKiQJty06VWFftzvIwxXhsNjrqls2+KzstAx 0lLvW1tqaDhXvUBImRM8GgfbldZslsgoFVmgESS9MpPMBNENYrkAiQNvJUnM7kd9 qHDQNq+zRNsz/k4fVvp/YUp7xEiAo4rLcFmp/dBr535jS2LNyiZnB94q+kXsin/m tiyEMx+RWxEHTEHN9WdKE61Ty1RbzOa5UTLSzOKFAkF+m2nvuQsJvb97n19coAq9 SSsj/wJgesfqrDEegphCDh1fyVxUzlAjjhTAyvPS155WvPzkbxZxuBbSqRuriRKA 2aCfVne2ELimHAr3LEPgPW2kFBcONHckOGe6MvrTX4zPHU8bb9WIeg+iGdQChnr3 nclT9jq+ZnQro5XTgUtPtadq100oEXlJbqpAzhd+cJbvgzSNbcWfcgE6kOWqd9uK oeWQWFLCdXLmXf9zCwmk =T7R2 -----END PGP SIGNATURE----- Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC driver updates from Olof Johansson: "These are changes for drivers that are intimately tied to some SoC and for some reason could not get merged through the respective subsystem maintainer tree. This time around, much of this is for at91, with the bulk of it being syscon and udc drivers. Also, there's: - coupled cpuidle support for Samsung Exynos4210 - Renesas 73A0 common-clk work - of/platform changes to tear down DMA mappings on device destruction - a few updates to the TI Keystone knav code" * tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (26 commits) cpuidle: exynos: add coupled cpuidle support for exynos4210 ARM: EXYNOS: apply S5P_CENTRAL_SEQ_OPTION fix only when necessary soc: ti: knav_qmss_queue: change knav_range_setup_acc_irq to static soc: ti: knav_qmss_queue: makefile tweak to build as dynamic module pcmcia: at91_cf: depend on !ARCH_MULTIPLATFORM soc: ti: knav_qmss_queue: export API calls for use by user driver of/platform: teardown DMA mappings on device destruction usb: gadget: at91_udc: Allocate udc instance usb: gadget: at91_udc: Update DT binding documentation usb: gadget: at91_udc: Rework for multi-platform kernel support usb: gadget: at91_udc: Simplify probe and remove functions usb: gadget: at91_udc: Remove non-DT handling code usb: gadget: at91_udc: Document DT clocks and clock-names property usb: gadget: at91_udc: Drop uclk clock usb: gadget: at91_udc: Fix clock names mfd: syscon: Add Atmel SMC binding doc mfd: syscon: Add atmel-smc registers definition mfd: syscon: Add Atmel Matrix bus DT binding documentation mfd: syscon: Add atmel-matrix registers definition clk: shmobile: fix sparse NULL pointer warning ... |
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Rafael J. Wysocki
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124cf9117c |
PM / sleep: Make it possible to quiesce timers during suspend-to-idle
The efficiency of suspend-to-idle depends on being able to keep CPUs in the deepest available idle states for as much time as possible. Ideally, they should only be brought out of idle by system wakeup interrupts. However, timer interrupts occurring periodically prevent that from happening and it is not practical to chase all of the "misbehaving" timers in a whack-a-mole fashion. A much more effective approach is to suspend the local ticks for all CPUs and the entire timekeeping along the lines of what is done during full suspend, which also helps to keep suspend-to-idle and full suspend reasonably similar. The idea is to suspend the local tick on each CPU executing cpuidle_enter_freeze() and to make the last of them suspend the entire timekeeping. That should prevent timer interrupts from triggering until an IO interrupt wakes up one of the CPUs. It needs to be done with interrupts disabled on all of the CPUs, though, because otherwise the suspended clocksource might be accessed by an interrupt handler which might lead to fatal consequences. Unfortunately, the existing ->enter callbacks provided by cpuidle drivers generally cannot be used for implementing that, because some of them re-enable interrupts temporarily and some idle entry methods cause interrupts to be re-enabled automatically on exit. Also some of these callbacks manipulate local clock event devices of the CPUs which really shouldn't be done after suspending their ticks. To overcome that difficulty, introduce a new cpuidle state callback, ->enter_freeze, that will be guaranteed (1) to keep interrupts disabled all the time (and return with interrupts disabled) and (2) not to touch the CPU timer devices. Modify cpuidle_enter_freeze() to look for the deepest available idle state with ->enter_freeze present and to make the CPU execute that callback with suspended tick (and the last of the online CPUs to execute it with suspended timekeeping). Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> |
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Rafael J. Wysocki
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3810631332 |
PM / sleep: Re-implement suspend-to-idle handling
In preparation for adding support for quiescing timers in the final stage of suspend-to-idle transitions, rework the freeze_enter() function making the system wait on a wakeup event, the freeze_wake() function terminating the suspend-to-idle loop and the mechanism by which deep idle states are entered during suspend-to-idle. First of all, introduce a simple state machine for suspend-to-idle and make the code in question use it. Second, prevent freeze_enter() from losing wakeup events due to race conditions and ensure that the number of online CPUs won't change while it is being executed. In addition to that, make it force all of the CPUs re-enter the idle loop in case they are in idle states already (so they can enter deeper idle states if possible). Next, drop cpuidle_use_deepest_state() and replace use_deepest_state checks in cpuidle_select() and cpuidle_reflect() with a single suspend-to-idle state check in cpuidle_idle_call(). Finally, introduce cpuidle_enter_freeze() that will simply find the deepest idle state available to the given CPU and enter it using cpuidle_enter(). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> |
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Linus Torvalds
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6b00f7efb5 |
arm64 updates for 3.20:
- reimplementation of the virtual remapping of UEFI Runtime Services in
a way that is stable across kexec
- emulation of the "setend" instruction for 32-bit tasks (user
endianness switching trapped in the kernel, SCTLR_EL1.E0E bit set
accordingly)
- compat_sys_call_table implemented in C (from asm) and made it a
constant array together with sys_call_table
- export CPU cache information via /sys (like other architectures)
- DMA API implementation clean-up in preparation for IOMMU support
- macros clean-up for KVM
- dropped some unnecessary cache+tlb maintenance
- CONFIG_ARM64_CPU_SUSPEND clean-up
- defconfig update (CPU_IDLE)
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Catalin Marinas:
"arm64 updates for 3.20:
- reimplementation of the virtual remapping of UEFI Runtime Services
in a way that is stable across kexec
- emulation of the "setend" instruction for 32-bit tasks (user
endianness switching trapped in the kernel, SCTLR_EL1.E0E bit set
accordingly)
- compat_sys_call_table implemented in C (from asm) and made it a
constant array together with sys_call_table
- export CPU cache information via /sys (like other architectures)
- DMA API implementation clean-up in preparation for IOMMU support
- macros clean-up for KVM
- dropped some unnecessary cache+tlb maintenance
- CONFIG_ARM64_CPU_SUSPEND clean-up
- defconfig update (CPU_IDLE)
The EFI changes going via the arm64 tree have been acked by Matt
Fleming. There is also a patch adding sys_*stat64 prototypes to
include/linux/syscalls.h, acked by Andrew Morton"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (47 commits)
arm64: compat: Remove incorrect comment in compat_siginfo
arm64: Fix section mismatch on alloc_init_p[mu]d()
arm64: Avoid breakage caused by .altmacro in fpsimd save/restore macros
arm64: mm: use *_sect to check for section maps
arm64: drop unnecessary cache+tlb maintenance
arm64:mm: free the useless initial page table
arm64: Enable CPU_IDLE in defconfig
arm64: kernel: remove ARM64_CPU_SUSPEND config option
arm64: make sys_call_table const
arm64: Remove asm/syscalls.h
arm64: Implement the compat_sys_call_table in C
syscalls: Declare sys_*stat64 prototypes if __ARCH_WANT_(COMPAT_)STAT64
compat: Declare compat_sys_sigpending and compat_sys_sigprocmask prototypes
arm64: uapi: expose our struct ucontext to the uapi headers
smp, ARM64: Kill SMP single function call interrupt
arm64: Emulate SETEND for AArch32 tasks
arm64: Consolidate hotplug notifier for instruction emulation
arm64: Track system support for mixed endian EL0
arm64: implement generic IOMMU configuration
arm64: Combine coherent and non-coherent swiotlb dma_ops
...
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Olof Johansson
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6f4554bdff |
Samsung CPUIdle updates for v3.20
- adds coupled cpuidle support for exynos4210 : fix for Exynos platform PM code preparing it for the coupled cpuidle support and adds coupled cpuidle AFTR mode on exynos4210 Note this is mostrly based on earlier cpuidle-exynos4210 driver from Daniel Lezcano and Bart updated. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJU0ikrAAoJEA0Cl+kVi2xqLoUQAI2JZi6XyeyJ+0YNGn+TpGEp OBMks8hVyUXDIk+juuijRLh1MTzOkguMNKjS8y84IHpM8SvVUiPzh/b4pPBr7i14 c6zaocm17HePZwF9tR5VwLAAiyV+0f9rRgUUBSaVTyc5/tMFJES6iuNVzPwa7fqf 5u7YjAuV1N349NC8148wvvrg/ICktpdCydYmfOfOTsjgVNwiyd4kF3ofC7Xt9MrN fNgdl+OQZxOIWFKkBw3p3+exWybgjd9GE5K9kuASmGWrIOXjRO4KxO/UqRBNJIhH bVjnkEq88kczf4Z999YHO33fMaMC3y/h++luRgkzxOZge0KVbqusikq+dCc5je3D k/TPn0tnc8A2nbbcvziuXOe/EhudqXWD+QZXhRcmUAeRFDA1DNsEfSHzujD1fbyn TA9+RjLodCv2LT5wQq/EHs5yiAYChiUz/TGOBwhHzMUNvXKs3cSBtATabXgWrCtd pYtI+o1FYekccafF1bUWMIR6BDHxAOb41FDQVZYzi7+ez5yHHYEwZGqPXLmY3x/f 8Nvyy2PgOouB5cHSxn9r0wtMM0nATWB1WNUIf3cPRCHZKpxpHOhrH4CEDsQG02FS qhs8QARvDA2pCV+m9hFFKDt/VNMpzHnw6uC0XWlICrDk9sHPzwXVuB1MHcjr/n6w wJhgNOVyfTEnIDQi2mGt =nadx -----END PGP SIGNATURE----- Merge tag 'samsung-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers Merge "Samsung CPUIdle updates for v3.20" from Kukjin Kim: - adds coupled cpuidle support for exynos4210 : fix for Exynos platform PM code preparing it for the coupled cpuidle support and adds coupled cpuidle AFTR mode on exynos4210 Note this is mostrly based on earlier cpuidle-exynos4210 driver from Daniel Lezcano and Bart updated. * tag 'samsung-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: cpuidle: exynos: add coupled cpuidle support for exynos4210 ARM: EXYNOS: apply S5P_CENTRAL_SEQ_OPTION fix only when necessary Signed-off-by: Olof Johansson <olof@lixom.net> |
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Bartlomiej Zolnierkiewicz
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712eddf702 |
cpuidle: exynos: add coupled cpuidle support for exynos4210
The following patch adds coupled cpuidle support for Exynos4210 to an existing cpuidle-exynos driver. As a result it enables AFTR mode to be used by default on Exynos4210 without the need to hot unplug CPU1 first. The patch is heavily based on earlier cpuidle-exynos4210 driver from Daniel Lezcano: http://www.spinics.net/lists/linux-samsung-soc/msg28134.html Changes from Daniel's code include: - porting code to current kernels - fixing it to work on my setup (by using S5P_INFORM register instead of S5P_VA_SYSRAM one on Revison 1.1 and retrying poking CPU1 out of the BOOT ROM if necessary) - fixing rare lockup caused by waiting for CPU1 to get stuck in the BOOT ROM (CPU hotplug code in arch/arm/mach-exynos/platsmp.c doesn't require this and works fine) - moving Exynos specific code to arch/arm/mach-exynos/pm.c - using cpu_boot_reg_base() helper instead of BOOT_VECTOR macro - using exynos_cpu_*() helpers instead of accessing registers directly - using arch_send_wakeup_ipi_mask() instead of dsb_sev() (this matches CPU hotplug code in arch/arm/mach-exynos/platsmp.c) - integrating separate exynos4210-cpuidle driver into existing exynos-cpuidle one Cc: Colin Cross <ccross@google.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Tomasz Figa <tomasz.figa@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Kukjin Kim <kgene@kernel.org> |
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Lorenzo Pieralisi
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af3cfdbf56 |
arm64: kernel: remove ARM64_CPU_SUSPEND config option
ARM64_CPU_SUSPEND config option was introduced to make code providing context save/restore selectable only on platforms requiring power management capabilities. Currently ARM64_CPU_SUSPEND depends on the PM_SLEEP config option which in turn is set by the SUSPEND config option. The introduction of CPU_IDLE for arm64 requires that code configured by ARM64_CPU_SUSPEND (context save/restore) should be compiled in in order to enable the CPU idle driver to rely on CPU operations carrying out context save/restore. The ARM64_CPUIDLE config option (ARM64 generic idle driver) is therefore forced to select ARM64_CPU_SUSPEND, even if there may be (ie PM_SLEEP) failed dependencies, which is not a clean way of handling the kernel configuration option. For these reasons, this patch removes the ARM64_CPU_SUSPEND config option and makes the context save/restore dependent on CPU_PM, which is selected whenever either SUSPEND or CPU_IDLE are configured, cleaning up dependencies in the process. This way, code previously configured through ARM64_CPU_SUSPEND is compiled in whenever a power management subsystem requires it to be present in the kernel (SUSPEND || CPU_IDLE), which is the behaviour expected on ARM64 kernels. The cpu_suspend and cpu_init_idle CPU operations are added only if CPU_IDLE is selected, since they are CPU_IDLE specific methods and should be grouped and defined accordingly. PSCI CPU operations are updated to reflect the introduced changes. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Will Deacon <will.deacon@arm.com> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
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Sudeep Holla
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194fe6f28e |
drivers: cpuidle: Don't initialize big.LITTLE driver if MCPM is unavailable
If big.LITTLE driver is initialized even when MCPM is unavailable, we get the below warning the first time cpu tries to enter deeper C-states. ------------[ cut here ]------------ WARNING: CPU: 4 PID: 0 at kernel/arch/arm/common/mcpm_entry.c:130 mcpm_cpu_suspend+0x6d/0x74() Modules linked in: CPU: 4 PID: 0 Comm: swapper/4 Not tainted 3.19.0-rc3-00007-gaf5a2cb1ad5c-dirty #11 Hardware name: ARM-Versatile Express [<c0013fa5>] (unwind_backtrace) from [<c001084d>] (show_stack+0x11/0x14) [<c001084d>] (show_stack) from [<c04fe7f1>] (dump_stack+0x6d/0x78) [<c04fe7f1>] (dump_stack) from [<c0020645>] (warn_slowpath_common+0x69/0x90) [<c0020645>] (warn_slowpath_common) from [<c00206db>] (warn_slowpath_null+0x17/0x1c) [<c00206db>] (warn_slowpath_null) from [<c001cbdd>] (mcpm_cpu_suspend+0x6d/0x74) [<c001cbdd>] (mcpm_cpu_suspend) from [<c03c6919>] (bl_powerdown_finisher+0x21/0x24) [<c03c6919>] (bl_powerdown_finisher) from [<c001218d>] (cpu_suspend_abort+0x1/0x14) [<c001218d>] (cpu_suspend_abort) from [<00000000>] ( (null)) ---[ end trace d098e3fd00000008 ]--- This patch fixes the issue by checking for the availability of MCPM before initializing the big.LITTLE cpuidle driver Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Rafael J. Wysocki
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ff23ab2441 |
Merge branches 'pm-cpufreq' and 'pm-cpuidle'
* pm-cpufreq: cpufreq: fix a NULL pointer dereference in __cpufreq_governor() cpufreq-dt: defer probing if OPP table is not ready * pm-cpuidle: cpuidle / ACPI: remove unused CPUIDLE_FLAG_TIME_INVALID cpuidle: ladder: Better idle duration measurement without using CPUIDLE_FLAG_TIME_INVALID cpuidle: menu: Better idle duration measurement without using CPUIDLE_FLAG_TIME_INVALID |
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Linus Torvalds
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34b85e3574 |
powerpc updates for 3.19 batch 2
The highlight is the series that reworks the idle management on powernv, which allows us to use deeper idle states on those machines. There's the fix from Anton for the "BUG at kernel/smpboot.c:134!" problem. An i2c driver for powernv. This is acked by Wolfram Sang, and he asked that we take it through the powerpc tree. A fix for audit from rgb at Red Hat, acked by Paul Moore who is one of the audit maintainers. A patch from Ben to export the symbol map of our OPAL firmware as a sysfs file, so that tools can use it. Also some CXL fixes, a couple of powerpc perf fixes, a fix for smt-enabled, and the patch to add __force to get_user() so we can use bitwise types. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJUk+oCAAoJEFHr6jzI4aWADBAP/i/CJ+cu6o4mzNDdfs8bnxqn RGZCSV+SrkTZPcoLbLiM9iaqq34ORVIn7hwkhkTz2/koluMVfTsqtVulMoFf+hVd GTVt81MjMFzA3hM3bXEV58KRT79+64K54dLCe0F7OaD6f4AikKR4LLz/PY0EBMiZ 2h13uQlfglaMeYTsaD9eeUpIIKs7+PwsNqUknmN9We07WWfxWqnRpiTR4TYTMXx4 3lQPvCnnHokwDqjuKgwiqDVSaCfCl8laS1i+BPk0G0aRV1AnPDvR3MhgVb2IpNxX Joxy2D1HSawwDhqHOsId8dkGZXOM4vzo+Y658qnC1XfThqE0MhA+kCfa5/b6xlOR K7nDO5A41B6nXB3mMOQh/szTXSIa8KJRTR3ibbJJrMdF6F0TN0JLLQNUcmM4j/5D vvgZEzvFNZhWX98ktlQLde2E4ClWJg6mWESCGSgJeVjIXaxe/6GneIa8vLKm5QMu OoykNsASMDGqddYMGoYeX/mSsvjPjK0PDO2q19sPbkP8xpyDLx6J8xo+5hO4l8xc 0Cdb38ECfeno+w5oKAnjidHnz0KYBsuYFLeS+rV0b8sUSWAzfdEjSn2AVIQ8gLOv IOCAqwZ5tL9EcUs+AKru5EHtBEV+2XB54xPRxfdFS/k+vYRE7MpS3ipxveIynN2l eRxf9hsSO7ASNDd0b3ID =GXdK -----END PGP SIGNATURE----- Merge tag 'powerpc-3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull second batch of powerpc updates from Michael Ellerman: "The highlight is the series that reworks the idle management on powernv, which allows us to use deeper idle states on those machines. There's the fix from Anton for the "BUG at kernel/smpboot.c:134!" problem. An i2c driver for powernv. This is acked by Wolfram Sang, and he asked that we take it through the powerpc tree. A fix for audit from rgb at Red Hat, acked by Paul Moore who is one of the audit maintainers. A patch from Ben to export the symbol map of our OPAL firmware as a sysfs file, so that tools can use it. Also some CXL fixes, a couple of powerpc perf fixes, a fix for smt-enabled, and the patch to add __force to get_user() so we can use bitwise types" * tag 'powerpc-3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: powerpc/powernv: Ignore smt-enabled on Power8 and later powerpc/uaccess: Allow get_user() with bitwise types powerpc/powernv: Expose OPAL firmware symbol map powernv/powerpc: Add winkle support for offline cpus powernv/cpuidle: Redesign idle states management powerpc/powernv: Enable Offline CPUs to enter deep idle states powerpc/powernv: Switch off MMU before entering nap/sleep/rvwinkle mode i2c: Driver to expose PowerNV platform i2c busses powerpc: add little endian flag to syscall_get_arch() power/perf/hv-24x7: Use kmem_cache_free() instead of kfree powerpc/perf/hv-24x7: Use per-cpu page buffer cxl: Unmap MMIO regions when detaching a context cxl: Add timeout to process element commands cxl: Change contexts_lock to a mutex to fix sleep while atomic bug powerpc: Secondary CPUs must set cpu_callin_map after setting active and online |
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Len Brown
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b73026b9c9 |
cpuidle: ladder: Better idle duration measurement without using CPUIDLE_FLAG_TIME_INVALID
When the ladder governor sees the CPUIDLE_FLAG_TIME_INVALID flag, it unconditionally causes a state promotion by setting last_residency to a number higher than the state's promotion_time: last_residency = last_state->threshold.promotion_time + 1 It does this for fear that cpuidle_get_last_residency() will be in-accurate, because cpuidle_enter_state() invoked a state with CPUIDLE_FLAG_TIME_INVALID. But the only state with CPUIDLE_FLAG_TIME_INVALID is acpi_safe_halt(), which may return well after its actual idle duration because it enables interrupts, so cpuidle_enter_state() also measures interrupt service time. So what? In ladder, a huge invalid last_residency has exactly the same effect as the current code -- it unconditionally causes a state promotion. In the case where the idle residency plus measured interrupt handling time is less than the state's demotion_time -- we should use that timestamp to give ladder a chance to demote, rather than unconditionally promoting. This can be done by simply ignoring the CPUIDLE_FLAG_TIME_INVALID, and using the "invalid" time, as it is either equal to what we are doing today, or better. Signed-off-by: Len Brown <len.brown@intel.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Len Brown
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4108b3d962 |
cpuidle: menu: Better idle duration measurement without using CPUIDLE_FLAG_TIME_INVALID
When menu sees CPUIDLE_FLAG_TIME_INVALID, it ignores its timestamps, and assumes that idle lasted as long as the time till next predicted timer expiration. But if an interrupt was seen and serviced before that duration, it would actually be more accurate to use the measured time rather than rounding up to the next predicted timer expiration. And if an interrupt is seen and serviced such that the mesured time exceeds the time till next predicted timer expiration, then truncating to that expiration is the right thing to do -- since we can never stay idle past that timer expiration. So the code can do a better job without checking for CPUIDLE_FLAG_TIME_INVALID. Signed-off-by: Len Brown <len.brown@intel.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Tuukka Tikkanen <tuukka.tikkanen@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Linus Torvalds
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e6b5be2be4 |
Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEABECAAYFAlSOD20ACgkQMUfUDdst+ylLPACg2QrW1oHhdTMT9WI8jihlHVRM 53kAoLeteByQ3iVwWurwwseRPiWa8+MI =OVRS -----END PGP SIGNATURE----- Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ... |
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Shreyas B. Prabhu
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7cba160ad7 |
powernv/cpuidle: Redesign idle states management
Deep idle states like sleep and winkle are per core idle states. A core enters these states only when all the threads enter either the particular idle state or a deeper one. There are tasks like fastsleep hardware bug workaround and hypervisor core state save which have to be done only by the last thread of the core entering deep idle state and similarly tasks like timebase resync, hypervisor core register restore that have to be done only by the first thread waking up from these state. The current idle state management does not have a way to distinguish the first/last thread of the core waking/entering idle states. Tasks like timebase resync are done for all the threads. This is not only is suboptimal, but can cause functionality issues when subcores and kvm is involved. This patch adds the necessary infrastructure to track idle states of threads in a per-core structure. It uses this info to perform tasks like fastsleep workaround and timebase resync only once per core. Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com> Originally-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: linux-pm@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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Shreyas B. Prabhu
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8eb8ac89a3 |
powerpc/powernv: Enable Offline CPUs to enter deep idle states
The secondary threads should enter deep idle states so as to gain maximum powersavings when the entire core is offline. To do so the offline path must be made aware of the available deepest idle state. Hence probe the device tree for the possible idle states in powernv core code and expose the deepest idle state through flags. Since the device tree is probed by the cpuidle driver as well, move the parameters required to discover the idle states into an appropriate common place to both the driver and the powernv core code. Another point is that fastsleep idle state may require workarounds in the kernel to function properly. This workaround is introduced in the subsequent patches. However neither the cpuidle driver or the hotplug path need be bothered about this workaround. They will be taken care of by the core powernv code. Originally-by: Srivatsa S. Bhat <srivatsa@mit.edu> Signed-off-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com> Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com> Reviewed-by: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: linux-pm@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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Rafael J. Wysocki
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0a924200ae |
Merge back earlier cpuidle material for 3.19-rc1.
Conflicts: drivers/cpuidle/dt_idle_states.c |
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Lorenzo Pieralisi
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18f95a3640 |
drivers: cpuidle: Remove cpuidle-arm64 duplicate error messages
Current CPUidle driver for arm64 machines spits errors upon idle state initialization and cpuidle driver registration failures. These error messages are already printed in core code so there is no need to print them again. This patch removes the duplicate print messages from the cpuidle-arm64 driver. Acked-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Lorenzo Pieralisi
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c00bc5df7c |
drivers: cpuidle: Add idle-state-name description to ARM idle states
On ARM machines, where generally speaking the idle state numbering has no fixed and standard meaning it is useful to provide a description of the idle state inner workings for benchmarking and monitoring purposes. This patch adds a property to the idle states bindings that if present gives platform firmware a means of describing the idle state and export the string description to user space. The patch updates the DT parsing code accordingly to take the description, if present, into consideration. Acked-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Lorenzo Pieralisi
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97735da074 |
drivers: cpuidle: Add status property to ARM idle states
On some platforms the device tree bindings must provide the kernel with a status flag for idle states, that defines whether the idle state is operational or not in the current configuration. This patch adds a status property to the ARM idle states compliant with ePAPR v1.1 and updates the DT parsing code accordingly. Acked-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Daniel Lezcano
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b82b6cca48 |
cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic
The only place where the time is invalid is when the ACPI_CSTATE_FFH entry method is not set. Otherwise for all the drivers, the time can be correctly measured. Instead of duplicating the CPUIDLE_FLAG_TIME_VALID flag in all the drivers for all the states, just invert the logic by replacing it by the flag CPUIDLE_FLAG_TIME_INVALID, hence we can set this flag only for the acpi idle driver, remove the former flag from all the drivers and invert the logic with this flag in the different governor. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Greg Kroah-Hartman
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a8a93c6f99 |
Merge branch 'platform/remove_owner' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into driver-core-next
Remove all .owner fields from platform drivers |
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Linus Torvalds
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2cc91884b6 |
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle:
"This is the first round of fixes and tying up loose ends for MIPS.
- plenty of fixes for build errors in specific obscure configurations
- remove redundant code on the Lantiq platform
- removal of a useless SEAD I2C driver that was causing a build issue
- fix an earlier TLB exeption handler fix to also work on Octeon.
- fix ISA level dependencies in FPU emulator's instruction decoding.
- don't hardcode kernel command line in Octeon software emulator.
- fix an earlier fix for the Loondson 2 clock setting"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: SEAD3: Fix I2C device registration.
MIPS: SEAD3: Nuke PIC32 I2C driver.
MIPS: ftrace: Fix a microMIPS build problem
MIPS: MSP71xx: Fix build error
MIPS: Malta: Do not build the malta-amon.c file if CMP is not enabled
MIPS: Prevent compiler warning from cop2_{save,restore}
MIPS: Kconfig: Add missing MIPS_CPS dependencies to PM and cpuidle
MIPS: idle: Remove leftover __pastwait symbol and its references
MIPS: Sibyte: Include the swarm subdir to the sb1250 LittleSur builds
MIPS: ptrace.h: Add a missing include
MIPS: ath79: Fix compilation error when CONFIG_PCI is disabled
MIPS: MSP71xx: Remove compilation error when CONFIG_MIPS_MT is present
MIPS: Octeon: Remove special case for simulator command line.
MIPS: tlbex: Properly fix HUGE TLB Refill exception handler
MIPS: loongson2_cpufreq: Fix CPU clock rate setting mismerge
pci: pci-lantiq: remove duplicate check on resource
MIPS: Lasat: Add missing CONFIG_PROC_FS dependency to PICVUE_PROC
MIPS: cp1emu: Fix ISA restrictions for cop1x_op instructions
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Markos Chandras
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39a5959355 |
MIPS: Kconfig: Add missing MIPS_CPS dependencies to PM and cpuidle
The MIPS_CPS_PM and MIPS_CPS_CPUIDLE implementation should depend
on the MIPS_CPS symbol to avoid the following build problem
arch/mips/kernel/pm-cps.c: In function 'cps_pm_enter_state':
arch/mips/kernel/pm-cps.c:164:26: error: 'cpu_coherent_mask' undeclared
(first use in this function)
cpumask_clear_cpu(cpu, &cpu_coherent_mask);
^
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/7798/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Preeti U. Murthy
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74aa51b5cc |
cpuidle: powernv: Populate cpuidle state details by querying the device-tree
We hard code the metrics relevant for cpuidle states in the kernel today. Instead pick them up from the device tree so that they remain relevant and updated for the system that the kernel is running on. Signed-off-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com> Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Wolfram Sang
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c6ec883212 |
cpuidle: drop owner assignment from platform_drivers
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> |
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Linus Torvalds
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0429fbc0bd |
Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Pull percpu consistent-ops changes from Tejun Heo: "Way back, before the current percpu allocator was implemented, static and dynamic percpu memory areas were allocated and handled separately and had their own accessors. The distinction has been gone for many years now; however, the now duplicate two sets of accessors remained with the pointer based ones - this_cpu_*() - evolving various other operations over time. During the process, we also accumulated other inconsistent operations. This pull request contains Christoph's patches to clean up the duplicate accessor situation. __get_cpu_var() uses are replaced with with this_cpu_ptr() and __this_cpu_ptr() with raw_cpu_ptr(). Unfortunately, the former sometimes is tricky thanks to C being a bit messy with the distinction between lvalues and pointers, which led to a rather ugly solution for cpumask_var_t involving the introduction of this_cpu_cpumask_var_ptr(). This converts most of the uses but not all. Christoph will follow up with the remaining conversions in this merge window and hopefully remove the obsolete accessors" * 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (38 commits) irqchip: Properly fetch the per cpu offset percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t -fix ia64: sn_nodepda cannot be assigned to after this_cpu conversion. Use __this_cpu_write. percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t Revert "powerpc: Replace __get_cpu_var uses" percpu: Remove __this_cpu_ptr clocksource: Replace __this_cpu_ptr with raw_cpu_ptr sparc: Replace __get_cpu_var uses avr32: Replace __get_cpu_var with __this_cpu_write blackfin: Replace __get_cpu_var uses tile: Use this_cpu_ptr() for hardware counters tile: Replace __get_cpu_var uses powerpc: Replace __get_cpu_var uses alpha: Replace __get_cpu_var ia64: Replace __get_cpu_var uses s390: cio driver &__get_cpu_var replacements s390: Replace __get_cpu_var uses mips: Replace __get_cpu_var uses MIPS: Replace __get_cpu_var uses in FPU emulator. arm: Replace __this_cpu_ptr with raw_cpu_ptr ... |
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Linus Torvalds
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faafcba3b5 |
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"The main changes in this cycle were:
- Optimized support for Intel "Cluster-on-Die" (CoD) topologies (Dave
Hansen)
- Various sched/idle refinements for better idle handling (Nicolas
Pitre, Daniel Lezcano, Chuansheng Liu, Vincent Guittot)
- sched/numa updates and optimizations (Rik van Riel)
- sysbench speedup (Vincent Guittot)
- capacity calculation cleanups/refactoring (Vincent Guittot)
- Various cleanups to thread group iteration (Oleg Nesterov)
- Double-rq-lock removal optimization and various refactorings
(Kirill Tkhai)
- various sched/deadline fixes
... and lots of other changes"
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (72 commits)
sched/dl: Use dl_bw_of() under rcu_read_lock_sched()
sched/fair: Delete resched_cpu() from idle_balance()
sched, time: Fix build error with 64 bit cputime_t on 32 bit systems
sched: Improve sysbench performance by fixing spurious active migration
sched/x86: Fix up typo in topology detection
x86, sched: Add new topology for multi-NUMA-node CPUs
sched/rt: Use resched_curr() in task_tick_rt()
sched: Use rq->rd in sched_setaffinity() under RCU read lock
sched: cleanup: Rename 'out_unlock' to 'out_free_new_mask'
sched: Use dl_bw_of() under RCU read lock
sched/fair: Remove duplicate code from can_migrate_task()
sched, mips, ia64: Remove __ARCH_WANT_UNLOCKED_CTXSW
sched: print_rq(): Don't use tasklist_lock
sched: normalize_rt_tasks(): Don't use _irqsave for tasklist_lock, use task_rq_lock()
sched: Fix the task-group check in tg_has_rt_tasks()
sched/fair: Leverage the idle state info when choosing the "idlest" cpu
sched: Let the scheduler see CPU idle states
sched/deadline: Fix inter- exclusive cpusets migrations
sched/deadline: Clear dl_entity params when setscheduling to different class
sched/numa: Kill the wrong/dead TASK_DEAD check in task_numa_fault()
...
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Linus Torvalds
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b528392669 |
ACPI and power management updates for 3.18-rc1
- Rework the handling of wakeup IRQs by the IRQ core such that
all of them will be switched over to "wakeup" mode in
suspend_device_irqs() and in that mode the first interrupt
will abort system suspend in progress or wake up the system
if already in suspend-to-idle (or equivalent) without executing
any interrupt handlers. Among other things that eliminates the
wakeup-related motivation to use the IRQF_NO_SUSPEND interrupt
flag with interrupts which don't really need it and should not
use it (Thomas Gleixner and Rafael J Wysocki).
- Switch over ACPI to handling wakeup interrupts with the help
of the new mechanism introduced by the above IRQ core rework
(Rafael J Wysocki).
- Rework the core generic PM domains code to eliminate code that's
not used, add DT support and add a generic mechanism by which
devices can be added to PM domains automatically during
enumeration (Ulf Hansson, Geert Uytterhoeven and Tomasz Figa).
- Add debugfs-based mechanics for debugging generic PM domains
(Maciej Matraszek).
- ACPICA update to upstream version 20140828. Included are updates
related to the SRAT and GTDT tables and the _PSx methods are in
the METHOD_NAME list now (Bob Moore and Hanjun Guo).
- Add _OSI("Darwin") support to the ACPI core (unfortunately, that
can't really be done in a straightforward way) to prevent
Thunderbolt from being turned off on Apple systems after boot
(or after resume from system suspend) and rework the ACPI Smart
Battery Subsystem (SBS) driver to work correctly with Apple
platforms (Matthew Garrett and Andreas Noever).
- ACPI LPSS (Low-Power Subsystem) driver update cleaning up the
code, adding support for 133MHz I2C source clock on Intel Baytrail
to it and making it avoid using UART RTS override with Auto Flow
Control (Heikki Krogerus).
- ACPI backlight updates removing the video_set_use_native_backlight
quirk which is not necessary any more, making the code check the
list of output devices returned by the _DOD method to avoid
creating acpi_video interfaces that won't work and adding a quirk
for Lenovo Ideapad Z570 (Hans de Goede, Aaron Lu and Stepan Bujnak).
- New Win8 ACPI OSI quirks for some Dell laptops (Edward Lin).
- Assorted ACPI code cleanups (Fabian Frederick, Rasmus Villemoes,
Sudip Mukherjee, Yijing Wang, and Zhang Rui).
- cpufreq core updates and cleanups (Viresh Kumar, Preeti U Murthy,
Rasmus Villemoes).
- cpufreq driver updates: cpufreq-cpu0/cpufreq-dt (driver name
change among other things), ppc-corenet, powernv (Viresh Kumar,
Preeti U Murthy, Shilpasri G Bhat, Lucas Stach).
- cpuidle support for DT-based idle states infrastructure, new
ARM64 cpuidle driver, cpuidle core cleanups (Lorenzo Pieralisi,
Rasmus Villemoes).
- ARM big.LITTLE cpuidle driver updates: support for DT-based
initialization and Exynos5800 compatible string (Lorenzo Pieralisi,
Kevin Hilman).
- Rework of the test_suspend kernel command line argument and
a new trace event for console resume (Srinivas Pandruvada,
Todd E Brandt).
- Second attempt to optimize swsusp_free() (hibernation core) to
make it avoid going through all PFNs which may be way too slow on
some systems (Joerg Roedel).
- devfreq updates (Paul Bolle, Punit Agrawal, Ãrjan Eide).
- rockchip-io Adaptive Voltage Scaling (AVS) driver and AVS
entry update in MAINTAINERS (Heiko Stübner, Kevin Hilman).
- PM core fix related to clock management (Geert Uytterhoeven).
- PM core's sysfs code cleanup (Johannes Berg).
/
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Merge tag 'pm+acpi-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management updates from Rafael Wysocki:
"Features-wise, to me the most important this time is a rework of
wakeup interrupts handling in the core that makes them work
consistently across all of the available sleep states, including
suspend-to-idle. Many thanks to Thomas Gleixner for his help with
this work.
Second is an update of the generic PM domains code that has been in
need of some care for quite a while. Unused code is being removed, DT
support is being added and domains are now going to be attached to
devices in bus type code in analogy with the ACPI PM domain. The
majority of work here was done by Ulf Hansson who also has been the
most active developer this time.
Apart from this we have a traditional ACPICA update, this time to
upstream version 20140828 and a few ACPI wakeup interrupts handling
patches on top of the general rework mentioned above. There also are
several cpufreq commits including renaming the cpufreq-cpu0 driver to
cpufreq-dt, as this is what implements generic DT-based cpufreq
support, and a new DT-based idle states infrastructure for cpuidle.
In addition to that, the ACPI LPSS driver is updated, ACPI support for
Apple machines is improved, a few bugs are fixed and a few cleanups
are made all over.
Finally, the Adaptive Voltage Scaling (AVS) subsystem now has a tree
maintained by Kevin Hilman that will be merged through the PM tree.
Numbers-wise, the generic PM domains update takes the lead this time
with 32 non-merge commits, second is cpufreq (15 commits) and the 3rd
place goes to the wakeup interrupts handling rework (13 commits).
Specifics:
- Rework the handling of wakeup IRQs by the IRQ core such that all of
them will be switched over to "wakeup" mode in suspend_device_irqs()
and in that mode the first interrupt will abort system suspend in
progress or wake up the system if already in suspend-to-idle (or
equivalent) without executing any interrupt handlers. Among other
things that eliminates the wakeup-related motivation to use the
IRQF_NO_SUSPEND interrupt flag with interrupts which don't really
need it and should not use it (Thomas Gleixner and Rafael Wysocki)
- Switch over ACPI to handling wakeup interrupts with the help of the
new mechanism introduced by the above IRQ core rework (Rafael Wysocki)
- Rework the core generic PM domains code to eliminate code that's
not used, add DT support and add a generic mechanism by which
devices can be added to PM domains automatically during enumeration
(Ulf Hansson, Geert Uytterhoeven and Tomasz Figa).
- Add debugfs-based mechanics for debugging generic PM domains
(Maciej Matraszek).
- ACPICA update to upstream version 20140828. Included are updates
related to the SRAT and GTDT tables and the _PSx methods are in the
METHOD_NAME list now (Bob Moore and Hanjun Guo).
- Add _OSI("Darwin") support to the ACPI core (unfortunately, that
can't really be done in a straightforward way) to prevent
Thunderbolt from being turned off on Apple systems after boot (or
after resume from system suspend) and rework the ACPI Smart Battery
Subsystem (SBS) driver to work correctly with Apple platforms
(Matthew Garrett and Andreas Noever).
- ACPI LPSS (Low-Power Subsystem) driver update cleaning up the code,
adding support for 133MHz I2C source clock on Intel Baytrail to it
and making it avoid using UART RTS override with Auto Flow Control
(Heikki Krogerus).
- ACPI backlight updates removing the video_set_use_native_backlight
quirk which is not necessary any more, making the code check the
list of output devices returned by the _DOD method to avoid
creating acpi_video interfaces that won't work and adding a quirk
for Lenovo Ideapad Z570 (Hans de Goede, Aaron Lu and Stepan Bujnak)
- New Win8 ACPI OSI quirks for some Dell laptops (Edward Lin)
- Assorted ACPI code cleanups (Fabian Frederick, Rasmus Villemoes,
Sudip Mukherjee, Yijing Wang, and Zhang Rui)
- cpufreq core updates and cleanups (Viresh Kumar, Preeti U Murthy,
Rasmus Villemoes)
- cpufreq driver updates: cpufreq-cpu0/cpufreq-dt (driver name change
among other things), ppc-corenet, powernv (Viresh Kumar, Preeti U
Murthy, Shilpasri G Bhat, Lucas Stach)
- cpuidle support for DT-based idle states infrastructure, new ARM64
cpuidle driver, cpuidle core cleanups (Lorenzo Pieralisi, Rasmus
Villemoes)
- ARM big.LITTLE cpuidle driver updates: support for DT-based
initialization and Exynos5800 compatible string (Lorenzo Pieralisi,
Kevin Hilman)
- Rework of the test_suspend kernel command line argument and a new
trace event for console resume (Srinivas Pandruvada, Todd E Brandt)
- Second attempt to optimize swsusp_free() (hibernation core) to make
it avoid going through all PFNs which may be way too slow on some
systems (Joerg Roedel)
- devfreq updates (Paul Bolle, Punit Agrawal, Ãrjan Eide).
- rockchip-io Adaptive Voltage Scaling (AVS) driver and AVS entry
update in MAINTAINERS (Heiko Stübner, Kevin Hilman)
- PM core fix related to clock management (Geert Uytterhoeven)
- PM core's sysfs code cleanup (Johannes Berg)"
* tag 'pm+acpi-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (105 commits)
ACPI / fan: printk replacement
PM / clk: Fix crash in clocks management code if !CONFIG_PM_RUNTIME
PM / Domains: Rename cpu_data to cpuidle_data
cpufreq: cpufreq-dt: fix potential double put of cpu OF node
cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'
PM / hibernate: Iterate over set bits instead of PFNs in swsusp_free()
cpufreq: ppc-corenet: remove duplicate update of cpu_data
ACPI / sleep: Rework the handling of ACPI GPE wakeup from suspend-to-idle
PM / sleep: Rename platform suspend/resume functions in suspend.c
PM / sleep: Export dpm_suspend_late/noirq() and dpm_resume_early/noirq()
ACPICA: Introduce acpi_enable_all_wakeup_gpes()
ACPICA: Clear all non-wakeup GPEs in acpi_hw_enable_wakeup_gpe_block()
ACPI / video: check _DOD list when creating backlight devices
PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h
cpufreq: Replace strnicmp with strncasecmp
cpufreq: powernv: Set the cpus to nominal frequency during reboot/kexec
cpufreq: powernv: Set the pstate of the last hotplugged out cpu in policy->cpus to minimum
cpufreq: Allow stop CPU callback to be used by all cpufreq drivers
PM / devfreq: exynos: Enable building exynos PPMU as module
PM / devfreq: Export helper functions for drivers
...
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Linus Torvalds
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cf377ad7d4 |
ARM: SoC platform changes for 3.18
New and updated SoC support. Among the things new for this release are:
- at91: Added support for the new SAMA5D4 SoC, following the earlier SAMA5D3
- bcm: Added support for BCM63XX family of DSL SoCs
- hisi: Added support for HiP04 server-class SoC
- meson: Initial support for the Amlogic Meson6 (aka 8726MX) platform
- shmobile: added support for new r8a7794 (R-Car E2) automotive SoC
Noteworthy changes to existing SoC support are:
- imx: convert i.MX1 to device tree
- omap: lots of power management work
- omap: base support to enable moving to standard UART driver
- shmobile: lots of progress for multiplatform support, still ongoing
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Merge tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform changes from Arnd Bergmann:
"New and updated SoC support. Among the things new for this release
are:
- at91: Added support for the new SAMA5D4 SoC, following the earlier
SAMA5D3
- bcm: Added support for BCM63XX family of DSL SoCs
- hisi: Added support for HiP04 server-class SoC
- meson: Initial support for the Amlogic Meson6 (aka 8726MX) platform
- shmobile: added support for new r8a7794 (R-Car E2) automotive SoC
Noteworthy changes to existing SoC support are:
- imx: convert i.MX1 to device tree
- omap: lots of power management work
- omap: base support to enable moving to standard UART driver
- shmobile: lots of progress for multiplatform support, still
ongoing"
* tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (171 commits)
ARM: hisi: depend on ARCH_MULTI_V7
CNS3xxx: Fix debug UART.
ARM: at91: fix nommu build regression
ARM: meson: add basic support for MesonX SoCs
ARM: meson: debug: add debug UART for earlyprintk support
irq: Export handle_fasteoi_irq
ARM: mediatek: Add earlyprintk support for mt6589
ARM: hisi: Fix platmcpm compilation when ARMv6 is selected
ARM: debug: fix alphanumerical order on debug uarts
ARM: at91: document Atmel SMART compatibles
ARM: at91: add sama5d4 support to sama5_defconfig
ARM: at91: dt: add device tree file for SAMA5D4ek board
ARM: at91: dt: add device tree file for SAMA5D4 SoC
ARM: at91: SAMA5D4 SoC detection code and low level routines
ARM: at91: introduce basic SAMA5D4 support
clk: at91: add a driver for the h32mx clock
ARM: pxa3xx: provide specific platform_devices for all ssp ports
ARM: pxa: ssp: provide platform_device_id for PXA3xx
ARM: OMAP4+: Remove static iotable mappings for SRAM
ARM: OMAP4+: Move SRAM data to DT
...
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Rafael J. Wysocki
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eeb1aa5f78 |
Merge branch 'cpuidle/3.18' of https://git.linaro.org/people/daniel.lezcano/linux into pm-cpuidle
Pull ARM cpuidle changes for v3.18 from Daniel Lezcano: "this pull request contains the following changes: * Lorenzo Pieralisi implemented a framework to initialize the ARM cpuidle drivers with the DT. As an example, it provided a couple of drivers using it: arm64 and big little. The former one is a new driver while the latter is a change. There was also a patch for Exynos allowing to use this framework but as it depends on a change in Samsung's tree, I postponed this patch until the change is visible after the merge. The set of changes depends on some other changes made in the ARM64 tree, for this reason a shared branch is used. This is why there is a merge from arm64 in my pull request. I believe we already used this procedure. * Kevin Hilman added the compatible string for the exynos 5800 in the DT" * 'cpuidle/3.18' of https://git.linaro.org/people/daniel.lezcano/linux: drivers: cpuidle: initialize big.LITTLE driver through DT drivers: cpuidle: CPU idle ARM64 driver drivers: cpuidle: implement DT based idle states infrastructure cpuidle: big.LITTLE: add Exynos5800 compatible string arm64: add PSCI CPU_SUSPEND based cpu_suspend support arm64: kernel: introduce cpu_init_idle CPU operation arm64: kernel: refactor the CPU suspend API for retention states Documentation: arm: define DT idle states bindings |
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Arnd Bergmann
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e36087998a |
arm: Xilinx Zynq cleanup patches for v3.18
- PM support - Fix L2 useless setting -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEABECAAYFAlQYGFwACgkQykllyylKDCFI/ACeMQecelDM7sN3pOXVDA8unho5 eqEAnjwQL/kw2p8jru1+t13V1SxThxKa =xfgX -----END PGP SIGNATURE----- Merge tag 'zynq-cleanup-for-3.18' of git://git.xilinx.com/linux-xlnx into next/soc Pull "arm: Xilinx Zynq cleanup patches for v3.18" from Michal Simek: - PM support - Fix L2 useless setting Signed-off-by: Arnd Bergmann <arnd@arndb.de> * tag 'zynq-cleanup-for-3.18' of git://git.xilinx.com/linux-xlnx: ARM: zynq: Remove useless L2C AUX setting ARM: zynq: Rename 'zynq_platform_cpu_die' ARM: zynq: Remove hotplug.c ARM: zynq: Synchronise zynq_cpu_die/kill ARM: zynq: cpuidle: Remove pointless code ARM: zynq: Remove invalidate cache for cpu die ARM: zynq: PM: Enable DDR clock stop ARM: zynq: DT: Add DDRC node Documentation: devicetree: Add binding for Synopsys DDR controller ARM: zynq: PM: Enable A9 internal clock gating feature |
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Lorenzo Pieralisi
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d2e5c871ed |
drivers: cpuidle: initialize big.LITTLE driver through DT
With the introduction of DT based idle states, CPUidle drivers for ARM can now initialize idle states data through properties in the device tree. This patch adds code to the big.LITTLE CPUidle driver to dynamically initialize idle states data through the updated device tree source file. Cc: Chander Kashyap <k.chander@samsung.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Lorenzo Pieralisi
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3299b63de3 |
drivers: cpuidle: CPU idle ARM64 driver
This patch implements a generic CPU idle driver for ARM64 machines. It relies on the DT idle states infrastructure to initialize idle states count and respective parameters. Current code assumes the driver is managing idle states on all possible CPUs but can be easily generalized to support heterogenous systems and build cpumasks at runtime using MIDRs or DT cpu nodes compatible properties. The driver relies on the arm64 CPU operations to call the idle initialization hook used to parse and save suspend back-end specific idle states information upon probing. Idle state index 0 is always initialized as a simple wfi state, ie always considered present and functional on all ARM64 platforms. Idle state indices higher than 0 trigger idle state entry by calling the cpu_suspend function, that triggers the suspend operation through the CPU operations suspend back-end hook. cpu_suspend passes the idle state index as a parameter so that the CPU operations suspend back-end can retrieve the required idle state data by using the idle state index to execute a look-up on its internal data structures. Reviewed-by: Ashwin Chaugule <ashwin.chaugule@linaro.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Lorenzo Pieralisi
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9f14da3455 |
drivers: cpuidle: implement DT based idle states infrastructure
On most common ARM systems, the low-power states a CPU can be put into are not discoverable in HW and require device tree bindings to describe power down suspend operations and idle states parameters. In order to enable DT based idle states and configure idle drivers, this patch implements the bulk infrastructure required to parse the device tree idle states bindings and initialize the corresponding CPUidle driver states data. The parsing API accepts a start index that defines the first idle state that should be initialized by the parsing code in order to give new and legacy driver flexibility over which states should be parsed using the new DT mechanism. The idle states node(s) is obtained from the phandle list of the first cpu in the driver cpumask; the kernel checks that the idle state node phandle is the same for all CPUs in the driver cpumask before declaring the idle state as valid and start parsing its content. The idle state enter function pointer is initialized through DT match structures passed in by the CPUidle driver, so that ARM legacy code can cope with platform specific idle entry method based on compatible string matching and the code used to initialize the enter function pointer can be moved to the DT generic layer. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Kevin Hilman
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6baf6ee534 |
cpuidle: big.LITTLE: add Exynos5800 compatible string
Exynos 5800 is big.LITTLE SoC compatible with the 5420. Add the compatible string so this driver works on the 5800. Tested on exynos5800-peach-pi (aka Samsung Chromebook2) Signed-off-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Rasmus Villemoes
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9133664097 |
cpuidle: Replace strnicmp with strncasecmp
The kernel used to contain two functions for length-delimited, case-insensitive string comparison, strnicmp with correct semantics and a slightly buggy strncasecmp. The latter is the POSIX name, so strnicmp was renamed to strncasecmp, and strnicmp made into a wrapper for the new strncasecmp to avoid breaking existing users. To allow the compat wrapper strnicmp to be removed at some point in the future, and to avoid the extra indirection cost, do s/strnicmp/strncasecmp/g. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Daniel Lezcano
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442bf3aaf5 |
sched: Let the scheduler see CPU idle states
When the cpu enters idle, it stores the cpuidle state pointer in its struct rq instance which in turn could be used to make a better decision when balancing tasks. As soon as the cpu exits its idle state, the struct rq reference is cleared. There are a couple of situations where the idle state pointer could be changed while it is being consulted: 1. For x86/acpi with dynamic c-states, when a laptop switches from battery to AC that could result on removing the deeper idle state. The acpi driver triggers: 'acpi_processor_cst_has_changed' 'cpuidle_pause_and_lock' 'cpuidle_uninstall_idle_handler' 'kick_all_cpus_sync'. All cpus will exit their idle state and the pointed object will be set to NULL. 2. The cpuidle driver is unloaded. Logically that could happen but not in practice because the drivers are always compiled in and 95% of them are not coded to unregister themselves. In any case, the unloading code must call 'cpuidle_unregister_device', that calls 'cpuidle_pause_and_lock' leading to 'kick_all_cpus_sync' as mentioned above. A race can happen if we use the pointer and then one of these two scenarios occurs at the same moment. In order to be safe, the idle state pointer stored in the rq must be used inside a rcu_read_lock section where we are protected with the 'rcu_barrier' in the 'cpuidle_uninstall_idle_handler' function. The idle_get_state() and idle_put_state() accessors should be used to that effect. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: linux-pm@vger.kernel.org Cc: linaro-kernel@lists.linaro.org Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/n/tip-@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Olof Johansson
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422d9abf99 |
mvebu fixes for v3.17
- kirkwood
- final driver cleanup of ARCH_KIRKWOOD removal
- fix DT based DSA
- mvebu
- use BCH ECC for the RN2120 and RN104/2 nand chips
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Merge tag 'mvebu-fixes-3.17' of git://git.infradead.org/linux-mvebu into next/fixes-non-critical
Merge "mvebu fixes for v3.17" from Jason Cooper:
- kirkwood
- final driver cleanup of ARCH_KIRKWOOD removal
- fix DT based DSA
- mvebu
- use BCH ECC for the RN2120 and RN104/2 nand chips
* tag 'mvebu-fixes-3.17' of git://git.infradead.org/linux-mvebu:
ARM: mvebu: Netgear RN102: Use Hardware BCH ECC
ARM: Kirkwood: Fix DT based DSA.
ARM: mvebu: Netgear RN2120: Use Hardware BCH ECC
ARM: mvebu: Netgear RN104: Use Hardware BCH ECC
cpufreq: Remove ARCH_KIRKWOOD dependency
watchdog: Remove ARCH_KIRKWOOD dependency
rtc: Remove ARCH_KIRKWOOD dependency
leds: Remove ARCH_KIRKWOOD dependency
thermal: Remove ARCH_KIRKWOOD dependency
ata: Remove ARCH_KIRKWOOD dependency
cpuidle: kirkwood: Remove ARCH_KIRKWOOD dependency
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Chuansheng Liu
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2ed903c548 |
cpuidle: Use wake_up_all_idle_cpus() to wake up all idle cpus
Currently kick_all_cpus_sync() or smp_call_function() can not break the polling idle cpu immediately. Instead using wake_up_all_idle_cpus() which can wake up the polling idle cpu quickly is much more helpful for power. Signed-off-by: Chuansheng Liu <chuansheng.liu@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: linux-pm@vger.kernel.org Cc: changcheng.liu@intel.com Cc: xiaoming.wang@intel.com Cc: souvik.k.chakravarty@intel.com Cc: luto@amacapital.net Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: linux-pm@vger.kernel.org Link: http://lkml.kernel.org/r/1409815075-4180-3-git-send-email-chuansheng.liu@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Daniel Lezcano
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18aebf116b |
ARM: zynq: cpuidle: Remove pointless code
The core is not powered down, it is pointless to call the cpu_pm notifiers and switch to the global timer. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-and-tested-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> |
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Andrew Lunn
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e9e0da3323 |
cpuidle: kirkwood: Remove ARCH_KIRKWOOD dependency
mach-kirkwood has been removed, now that kirkwood lives in mach-mvebu. Use MACH_KIRKWOOD, which is set when kirkwood is built as part of mach-mvebu. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: linux-pm@vger.kernel.org Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net> Link: https://lkml.kernel.org/r/1409417172-6846-2-git-send-email-andrew@lunn.ch Signed-off-by: Jason Cooper <jason@lakedaemon.net> |
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Juri Lelli
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eba1c71819 |
ARM: 8130/1: cpuidle/cpuidle-big_little: fix reading cpu id part number
Commit
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Christoph Lameter
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229b6863b2 |
drivers/cpuidle: Replace __get_cpu_var uses for address calculation
All of these are for address calculation. Replace with this_cpu_ptr(). Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: linux-pm@vger.kernel.org Acked-by: Rafael J. Wysocki <rjw@sisk.pl> [cpufreq changes] Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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Linus Torvalds
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c9d26423e5 |
More ACPI and power management updates for 3.17-rc1
- Fix for an ACPI-based device hotplug regression introduced in 3.14
that causes a kernel panic to trigger when memory hot-remove is
attempted with CONFIG_ACPI_HOTPLUG_MEMORY unset from Tang Chen.
- Fix for a cpufreq regression introduced in 3.16 that triggers a
"sleeping function called from invalid context" bug in
dev_pm_opp_init_cpufreq_table() from Stephen Boyd.
- ACPI battery driver fix for a warning message added in 3.16 that
prints silly stuff sometimes from Mariusz Ceier.
- Hibernation fix for safer handling of mismatches in the 820 memory
map between the configurations during image creation and during
the subsequent restore from Chun-Yi Lee.
- ACPI processor driver fix to handle CPU hotplug notifications
correctly during system suspend/resume from Lan Tianyu.
- Series of four cpuidle menu governor cleanups that also should
speed it up a bit from Mel Gorman.
- Fixes for the speedstep-smi, integrator, cpu0 and arm_big_little
cpufreq drivers from Hans Wennborg, Himangi Saraogi, Markus Pargmann
and Uwe Kleine-König.
- Version 3.0 of the analyze_suspend.py suspend profiling tool
from Todd E Brandt.
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Merge tag 'pm+acpi-3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI and power management updates from Rafael Wysocki:
"These are a couple of regression fixes, cpuidle menu governor
optimizations, fixes for ACPI proccessor and battery drivers,
hibernation fix to avoid problems related to the e820 memory map,
fixes for a few cpufreq drivers and a new version of the suspend
profiling tool analyze_suspend.py.
Specifics:
- Fix for an ACPI-based device hotplug regression introduced in 3.14
that causes a kernel panic to trigger when memory hot-remove is
attempted with CONFIG_ACPI_HOTPLUG_MEMORY unset from Tang Chen
- Fix for a cpufreq regression introduced in 3.16 that triggers a
"sleeping function called from invalid context" bug in
dev_pm_opp_init_cpufreq_table() from Stephen Boyd
- ACPI battery driver fix for a warning message added in 3.16 that
prints silly stuff sometimes from Mariusz Ceier
- Hibernation fix for safer handling of mismatches in the 820 memory
map between the configurations during image creation and during the
subsequent restore from Chun-Yi Lee
- ACPI processor driver fix to handle CPU hotplug notifications
correctly during system suspend/resume from Lan Tianyu
- Series of four cpuidle menu governor cleanups that also should
speed it up a bit from Mel Gorman
- Fixes for the speedstep-smi, integrator, cpu0 and arm_big_little
cpufreq drivers from Hans Wennborg, Himangi Saraogi, Markus
Pargmann and Uwe Kleine-König
- Version 3.0 of the analyze_suspend.py suspend profiling tool from
Todd E Brandt"
* tag 'pm+acpi-3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / battery: Fix warning message in acpi_battery_get_state()
PM / tools: analyze_suspend.py: update to v3.0
cpufreq: arm_big_little: fix module license spec
cpufreq: speedstep-smi: fix decimal printf specifiers
ACPI / hotplug: Check scan handlers in acpi_scan_hot_remove()
cpufreq: OPP: Avoid sleeping while atomic
cpufreq: cpu0: Do not print error message when deferring
cpufreq: integrator: Use set_cpus_allowed_ptr
PM / hibernate: avoid unsafe pages in e820 reserved regions
ACPI / processor: Make acpi_cpu_soft_notify() process CPU FROZEN events
cpuidle: menu: Lookup CPU runqueues less
cpuidle: menu: Call nr_iowait_cpu less times
cpuidle: menu: Use ktime_to_us instead of reinventing the wheel
cpuidle: menu: Use shifts when calculating averages where possible
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Tomasz Figa
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01601b3495 |
ARM: EXYNOS: Fix suspend/resume sequences
Due to recent consolidation of Exynos suspend and cpuidle code, some
parts of suspend and resume sequences are executed two times, once from
exynos_pm_syscore_ops and then from exynos_cpu_pm_notifier() and thus it
breaks suspend, at least on Exynos4-based boards. In addition, simple
core power down from a cpuidle driver could, in case of CPU 0 could
result in calling functions that are specific to suspend and deeper idle
states.
This patch fixes the issue by moving those operations outside the CPU PM
notifier into suspend and AFTR code paths. This leads to a bit of code
duplication, but allows additional code simplification, so in the end
more code is removed than added.
Fixes:
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