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2016-09-08x86/cpu: Rename Merrifield2 to MoorefieldAndy Shevchenko1-2/+2
Merrifield2 is actually Moorefield. Rename it accordingly and drop tail digit from Merrifield1. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160906184254.94440-1-andriy.shevchenko@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-06-25powercap / RAPL: Add support for Ivy Bridge serverXiaolong Wang1-0/+1
It's confirmed that RAPL works as expected on Ivy Bridge servers. Tested against processor: Intel(R) Xeon(R) CPU E5-2697 v2 @2.70GHz Signed-off-by: Xiaolong Wang <xiaolong.wang@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-06-15powercap / RAPL: add support for DenvertonJacob Pan1-0/+1
Denverton micro server is Atom-based, but its RAPL interface is compatible with Core-based CPUs. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-06-15Merge back earlier powercap material for v4.8.Rafael J. Wysocki1-25/+80
2016-06-15powercap / RAPL: handle missing MSRsJacob Pan1-24/+79
Some RAPL MSRs may not exist on some CPUs, we need to continue the topology detection and enumerate what is available. This patch handles the missing MSRs, then reports to the powercap layer only the features available. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-06-10powercap / RAPL: reduce message loglevelJacob Pan1-1/+1
Since the RAPL interface is not architectual, its enumeration depends on poking MSRs instead of using the CPUID method. In KVM guests, the RAPL driver probe will fail and emit the following message for every CPU: "no valid rapl domains found in package" This patch converts the warning to a debug message only (still return -ENODEV so that RAPL does not run in KVM guests). Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> [ rjw: Subject & changelog ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-06-08x86, powercap, rapl: Add Skylake Server model numberDave Hansen1-0/+1
SKX uses similar RAPL interface as Broadwell server according to Jacob Pan. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave@sr71.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: jacob.jun.pan@intel.com Cc: linux-pm@vger.kernel.org Link: http://lkml.kernel.org/r/20160603001955.38E1E684@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-06-08x86, powercap, rapl: Reorder CPU detection tableDave Hansen1-8/+14
Let's make an effort to group these things by microarchitecture name. It makes it easier to see if something got missed. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave@sr71.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: jacob.jun.pan@intel.com Cc: linux-pm@vger.kernel.org Link: http://lkml.kernel.org/r/20160603001937.B53A383A@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-06-08x86, powercap, rapl: Use Intel model macros intead of open-codingDave Hansen1-21/+22
Use the new macros to remove another large set of open-coded values. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave@sr71.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: jacob.jun.pan@intel.com Cc: linux-pm@vger.kernel.org Link: http://lkml.kernel.org/r/20160603001936.F474F9D8@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-05-16Merge tag 'pm-4.7-rc1' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "The majority of changes go into the cpufreq subsystem this time. To me, quite obviously, the biggest ticket item is the new "schedutil" governor. Interestingly enough, it's the first new cpufreq governor since the beginning of the git era (except for some out-of-the-tree ones). There are two main differences between it and the existing governors. First, it uses the information provided by the scheduler directly for making its decisions, so it doesn't have to track anything by itself. Second, it can invoke drivers (supporting that feature) to adjust CPU performance right away without having to spawn work items to be executed in process context or similar. Currently, the acpi-cpufreq driver is the only one supporting that mode of operation, but then it is used on a large number of systems. The "schedutil" governor as included here is very simple and mostly regarded as a foundation for future work on the integration of the scheduler with CPU power management (in fact, there is work in progress on top of it already). Nevertheless it works and the preliminary results obtained with it are encouraging. There also is some consolidation of CPU frequency management for ARM platforms that can add their machine IDs the the new stub dt-platdev driver now and that will take care of creating the requisite platform device for cpufreq-dt, so it is not necessary to do that in platform code any more. Several ARM platforms are switched over to using this generic mechanism. In addition to that, the intel_pstate driver is now going to respect CPU frequency limits set by the platform firmware (or a BMC) and provided via the ACPI _PPC object. The devfreq subsystem is getting a new "passive" governor for SoCs subsystems that will depend on somebody else to manage their voltage rails and its support for Samsung Exynos SoCs is consolidated. The rest is support for new hardware (Intel Broxton support in intel_idle for one example), bug fixes, optimizations and cleanups in a number of places. Specifics: - New cpufreq "schedutil" governor (making decisions based on CPU utilization information provided by the scheduler and capable of switching CPU frequencies right away if the underlying driver supports that) and support for fast frequency switching in the acpi-cpufreq driver (Rafael Wysocki) - Consolidation of CPU frequency management on ARM platforms allowing them to get rid of some platform-specific boilerplate code if they are going to use the cpufreq-dt driver (Viresh Kumar, Finley Xiao, Marc Gonzalez) - Support for ACPI _PPC and CPU frequency limits in the intel_pstate driver (Srinivas Pandruvada) - Fixes and cleanups in the cpufreq core and generic governor code (Rafael Wysocki, Sai Gurrappadi) - intel_pstate driver optimizations and cleanups (Rafael Wysocki, Philippe Longepe, Chen Yu, Joe Perches) - cpufreq powernv driver fixes and cleanups (Akshay Adiga, Shilpasri Bhat) - cpufreq qoriq driver fixes and cleanups (Jia Hongtao) - ACPI cpufreq driver cleanups (Viresh Kumar) - Assorted cpufreq driver updates (Ashwin Chaugule, Geliang Tang, Javier Martinez Canillas, Paul Gortmaker, Sudeep Holla) - Assorted cpufreq fixes and cleanups (Joe Perches, Arnd Bergmann) - Fixes and cleanups in the OPP (Operating Performance Points) framework, mostly related to OPP sharing, and reorganization of OF-dependent code in it (Viresh Kumar, Arnd Bergmann, Sudeep Holla) - New "passive" governor for devfreq (for SoC subsystems that will rely on someone else for the management of their power resources) and consolidation of devfreq support for Exynos platforms, coding style and typo fixes for devfreq (Chanwoo Choi, MyungJoo Ham) - PM core fixes and cleanups, mostly to make it work better with the generic power domains (genpd) framework, and updates for that framework (Ulf Hansson, Thierry Reding, Colin Ian King) - Intel Broxton support for the intel_idle driver (Len Brown) - cpuidle core optimization and fix (Daniel Lezcano, Dave Gerlach) - ARM cpuidle cleanups (Jisheng Zhang) - Intel Kabylake support for the RAPL power capping driver (Jacob Pan) - AVS (Adaptive Voltage Switching) rockchip-io driver update (Heiko Stuebner) - Updates for the cpupower tool (Arjun Sreedharan, Colin Ian King, Mattia Dongili, Thomas Renninger)" * tag 'pm-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (112 commits) intel_pstate: Clean up get_target_pstate_use_performance() intel_pstate: Use sample.core_avg_perf in get_avg_pstate() intel_pstate: Clarify average performance computation intel_pstate: Avoid unnecessary synchronize_sched() during initialization cpufreq: schedutil: Make default depend on CONFIG_SMP cpufreq: powernv: del_timer_sync when global and local pstate are equal cpufreq: powernv: Move smp_call_function_any() out of irq safe block intel_pstate: Clean up intel_pstate_get() cpufreq: schedutil: Make it depend on CONFIG_SMP cpufreq: governor: Fix handling of special cases in dbs_update() PM / OPP: Move CONFIG_OF dependent code in a separate file cpufreq: intel_pstate: Ignore _PPC processing under HWP cpufreq: arm_big_little: use generic OPP functions for {init, free}_opp_table PM / OPP: add non-OF versions of dev_pm_opp_{cpumask_, }remove_table cpufreq: tango: Use generic platdev driver PM / OPP: pass cpumask by reference cpufreq: Fix GOV_LIMITS handling for the userspace governor cpupower: fix potential memory leak PM / devfreq: style/typo fixes PM / devfreq: exynos: Add the detailed correlation for Exynos5422 bus ..
2016-04-28powercap, perf/x86/intel/rapl: Add PSys supportSrinivas Pandruvada1-0/+69
Skylake processor supports a new set of RAPL registers for controlling entire SoC instead of just CPU package. This is useful for thermal and power control when source of power/thermal is not just CPU/GPU. This change adds a new platform domain (AKA PSys) to the current power capping Intel RAPL driver. PSys also supports PL1 (long term) and PL2 (short term) control like package domain. This also follows same MSRs for energy and time units as package domain. Unlike package domain, PSys support requires more than just processor level implementation. The other parts in the system need additional implementation, which OEMs needs to support. So not all Skylake systems will support PSys. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: bp@alien8.de Cc: hpa@zytor.com Cc: jacob.jun.pan@linux.intel.com Cc: rjw@rjwysocki.net Link: http://lkml.kernel.org/r/1460930581-29748-3-git-send-email-srinivas.pandruvada@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-26powercap/intel_rapl: Add support for KabylakeJacob Pan1-0/+2
Kabylake is similar to Skylake in terms of RAPL. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-04-05powercap: intel_rapl: Add missing Haswell modelSrinivas Pandruvada1-0/+1
Added missing model 0x46. Tested-and-reported-by: Piotr Maksymiuk <piotr.maksymiuk@movishell.pl> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-03-09powercap/rapl: track lead cpu per packageJacob Pan1-39/+20
RAPL driver operates on MSRs that are under package/socket scope instead of core scope. However, the current code does not keep track of which CPUs are available on each package for MSR access. Therefore it has to search for an active CPU on a given package each time. This patch optimizes the package level operations by tracking a per package lead CPU during initialization and CPU hotplug. The runtime search for active CPU is avoided. Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-03-09powercap/rapl: add package reference per domainJacob Pan1-45/+21
This patch adds to each rapl domain a reference of the package it belongs to. At runtime, we can then avoid searching the package data for each access. It simplifies the domain level operations which depend on package level information. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-03-09powercap/rapl: reduce ipi callsJacob Pan1-34/+85
Reduce remote CPU calls for MSR access by combining read modify write into one function. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-01-12Merge branch 'powercap'Rafael J. Wysocki2-11/+11
* powercap: powercap: constify powercap_zone_ops and powercap_zone_constraint_ops structures
2016-01-12Merge branch 'acpi-soc'Rafael J. Wysocki1-5/+5
* acpi-soc: PM / clk: don't leave clocks enabled when driver not bound i2c: dw: Add APM X-Gene ACPI I2C device support ACPI / APD: Add APM X-Gene ACPI I2C device support ACPI / LPSS: change 'does not have' to 'has' in comment Revert "dmaengine: dw: platform: provide platform data for Intel" dmaengine: dw: return immediately from IRQ when DMA isn't in use dmaengine: dw: platform: power on device on shutdown ACPI / LPSS: override power state for LPSS DMA device ACPI / LPSS: power on when probe() and otherwise when remove() ACPI / LPSS: do delay for all LPSS devices when D3->D0 ACPI / LPSS: allow to use specific PM domain during ->probe() Revert "ACPI / LPSS: allow to use specific PM domain during ->probe()" device core: add BUS_NOTIFY_DRIVER_NOT_BOUND notification x86/platform/iosf_mbi: Remove duplicate definitions Conflicts: drivers/i2c/busses/i2c-designware-platdrv.c
2016-01-02powercap: constify powercap_zone_ops and powercap_zone_constraint_ops structuresJulia Lawall2-11/+11
The powercap_zone_ops and powercap_zone_constraint_ops structures are never modified, so declare them as const. Most of the actual changes adjust indentation to accomodate the const keyword. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-12-12powercap / RAPL: fix BIOS lock checkPrarit Bhargava1-2/+5
Intel RAPL initialized on several systems where the BIOS lock bit (msr 0x610, bit 63) was set. This occured because the return value of rapl_read_data_raw() was being checked, rather than the value of the variable passed in, locked. This patch properly implments the rapl_read_data_raw() call to check the variable locked, and now the Intel RAPL driver outputs the warning: intel_rapl: RAPL package 0 domain package locked by BIOS and does not initialize for the package. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-12-09x86/platform/iosf_mbi: Remove duplicate definitionsAndy Shevchenko1-5/+5
The read and write opcodes are global for all units on SoC and even across Intel SoCs. Remove duplication of corresponding constants. At the same time convert all current users. No functional change. Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Boon Leong Ong <boon.leong.ong@intel.com> Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-10-16powercap / RAPL: Enable Broxton RAPL supportAmy Wiles1-0/+1
Broxton CPU ID for the RAPL driver. Signed-off-by: Amy Wiles <amy.l.wiles@intel.com> [ rjw: Subject and changelog. ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-08-29powercap / RAPL: disable the 2nd power limit properlySeiichi Ikarashi1-2/+4
Let rapl_unregister_powercap() disable the second power limit only if it exists. Intel64 SDM Vol.3 14.9 says that the package domain has it but neither the power plane domain nor the DRAM domain has it. Signed-off-by: Seiichi Ikarashi <s.ikarashi@jp.fujitsu.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-08-01powercap / RAPL: Add support for Broadwell-HRadivoje Jovanovic1-0/+1
This patch enabled RAPL to support Broadwell-H Signed-off-by: Radivoje Jovanovic <radivoje.jovanovic@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-08-01powercap / RAPL: Add support for Skylake H/SRadivoje Jovanovic1-0/+1
This patche enabled RAPL to support Intel Skylake H/S Signed-off-by: Radivoje Jovanovic <radivoje.jovanovic@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-05-21powercap / RAPL: Support Knights LandingDasaratharaman Chandramouli1-0/+1
This patch enables intel_rapl driver to run on the next-generation Intel(R) Xeon Phi Microarchitecture code named "Knights Landing" Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-05-05powercap / RAPL: Floor frequency setting in Atom SoCAjay Thomas1-9/+41
CPU Floor frequency is set in BIOS for newer Atom SoCs. This patch handles configuration of floor frequency for different variants of Atom SoCs appropriately and ensures configuration of floor frequency is not done from driver for these newer Atom SoCs. Since address of the register for configuring floor frequency might change for different Atom SoCs, this patch also prevents potential overwriting of wrong registers. Reviewed-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Ajay Thomas <ajay.thomas.david.rajamanickam@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-04-15powercap / RAPL: Add support for Intel Skylake processorsBrian Bian1-0/+1
Signed-off-by: Brian Bian <brian.bian@intel.com> Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-04-11powercap / RAPL: mark rapl_ids array as __initconstMathias Krause1-1/+1
The RAPL ids are only tested in rapl_init() which is itself an __init function. For the MODULE_DEVICE_TABLE() file2alias doesn't care about the section, just about the symbol name. Therefore it's safe to mark the rapl_ids[] array as __initconst so its memory can be released after initialization is done. Signed-off-by: Mathias Krause <minipli@googlemail.com> Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-04-11powercap / RAPL: add ID for Broadwell serverJacob Pan1-0/+1
Validated RAPL functions on this platform. Add support to driver. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-13powercap / RAPL: handle domains with different energy unitsJacob Pan1-15/+39
The current driver assumes all RAPL domains within a CPU package have the same energy unit. This is no longer true for HSW server CPUs since DRAM domain has is own fixed energy unit which can be different than the package energy unit enumerated by package power MSR. In fact, the default HSW EP package power unit is 61uJ whereas DRAM domain unit is 15.3uJ. The result is that DRAM power consumption is counted 4x more than real power reported by energy counters, similarly for max_energy_range_uj of DRAM domain. This patch adds domain specific energy unit per cpu type, it allows domain energy unit to override package energy unit if non zero. Please see this document for details. "Intel Xeon Processor E5-1600 and E5-2600 v3 Product Families, Volume 2 of 2. Datasheet, September 2014, Reference Number: 330784-001 " Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: 3.10+ <stable@vger.kernel.org> # 3.10+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-17powercap / RAPL: add IDs for future Xeon CPUsJacob Pan1-0/+1
Enable RAPL driver on Xeon cpu id 0x56. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-12powercap / RAPL: fix build dependency on iosf_mbiJacob Pan1-1/+1
RAPL on Atom depends on IOSF_MBI driver for setting floor frequency. This patch adds explicit dependency on CONFIG_IOSF_MB. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-11powercap / RAPL: add new model idsJacob Pan1-0/+3
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-11powercap / RAPL: handle atom and core differencesJacob Pan1-77/+139
RAPL implementation on Atom has made some changes that are not compatible with Core CPUs. Specifically, it is different in the way units are computed as well as floor frequency is enforced. This patch uses the per CPU model functions to handle the differences. Intel Software Developers' Manual has also been updated to reflect the changes in Table 35-7 V3C. Signed-off-by: Ajay Thomas <ajay.thomas.david.rajamanickam@intel.com> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-11powercap / RAPL: abstract per cpu type functionsJacob Pan1-10/+35
RAPL implementations may vary slightly between Core and Atom CPUs. There are also potential differences among generations of CPUs within the family. This patch adds a per model structure to abstract the differences such that variations can be handled cleanly. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-03powercap / RAPL: change domain detection messageJacob Pan1-4/+3
Many CPUs do not support complete set of RAPL domains, as a result this detection failed message is very misleading and can be annoying. [ 5.082632] intel_rapl: RAPL domain core detection failed [ 5.088370] intel_rapl: RAPL domain uncore detection failed So lower the warning message to info and only print out the RAPL domains that are supported. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-03powercap / RAPL: add support for CPU model 0x3fJason Baron1-0/+1
I've confirmed that monitoring the package power usage as well as setting power limits appear to be working as expected. Supports the package and dram domains. Tested aginst cpu: Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz Signed-off-by: Jason Baron <jbaron@akamai.com> Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-01powercap / RAPL: add new CPU IDsJacob Pan1-1/+3
Add support for Broadwell model 0x3d and Haswell model (0x3c). Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-01powercap / RAPL: further relax energy counter checksJacob Pan1-20/+9
Energy counters may roll slowly for some RAPL domains, checking all of them can be time consuming and takes unpredictable amount of time. Therefore, we relax the sanity check by only checking availability of the MSRs and non-zero value of the energy status counters. It has been shown sufficient for all the platforms tested to filter out inactive domains. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Acked-by: Durgadoss R <durgadoss.r@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-04-07Merge tag 'cpu-hotplug-3.15-rc1' of ↵Linus Torvalds1-2/+8
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull CPU hotplug notifiers registration fixes from Rafael Wysocki: "The purpose of this single series of commits from Srivatsa S Bhat (with a small piece from Gautham R Shenoy) touching multiple subsystems that use CPU hotplug notifiers is to provide a way to register them that will not lead to deadlocks with CPU online/offline operations as described in the changelog of commit 93ae4f978ca7f ("CPU hotplug: Provide lockless versions of callback registration functions"). The first three commits in the series introduce the API and document it and the rest simply goes through the users of CPU hotplug notifiers and converts them to using the new method" * tag 'cpu-hotplug-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (52 commits) net/iucv/iucv.c: Fix CPU hotplug callback registration net/core/flow.c: Fix CPU hotplug callback registration mm, zswap: Fix CPU hotplug callback registration mm, vmstat: Fix CPU hotplug callback registration profile: Fix CPU hotplug callback registration trace, ring-buffer: Fix CPU hotplug callback registration xen, balloon: Fix CPU hotplug callback registration hwmon, via-cputemp: Fix CPU hotplug callback registration hwmon, coretemp: Fix CPU hotplug callback registration thermal, x86-pkg-temp: Fix CPU hotplug callback registration octeon, watchdog: Fix CPU hotplug callback registration oprofile, nmi-timer: Fix CPU hotplug callback registration intel-idle: Fix CPU hotplug callback registration clocksource, dummy-timer: Fix CPU hotplug callback registration drivers/base/topology.c: Fix CPU hotplug callback registration acpi-cpufreq: Fix CPU hotplug callback registration zsmalloc: Fix CPU hotplug callback registration scsi, fcoe: Fix CPU hotplug callback registration scsi, bnx2fc: Fix CPU hotplug callback registration scsi, bnx2i: Fix CPU hotplug callback registration ...
2014-03-20powercap, intel-rapl: Fix CPU hotplug callback registrationSrivatsa S. Bhat1-2/+8
Subsystems that want to register CPU hotplug callbacks, as well as perform initialization for the CPUs that are already online, often do it as shown below: get_online_cpus(); for_each_online_cpu(cpu) init_cpu(cpu); register_cpu_notifier(&foobar_cpu_notifier); put_online_cpus(); This is wrong, since it is prone to ABBA deadlocks involving the cpu_add_remove_lock and the cpu_hotplug.lock (when running concurrently with CPU hotplug operations). Instead, the correct and race-free way of performing the callback registration is: cpu_notifier_register_begin(); for_each_online_cpu(cpu) init_cpu(cpu); /* Note the use of the double underscored version of the API */ __register_cpu_notifier(&foobar_cpu_notifier); cpu_notifier_register_done(); Fix the intel-rapl code in the powercap driver by using this latter form of callback registration. But retain the calls to get/put_online_cpus(), since they also protect the function rapl_cleanup_data(). By nesting get/put_online_cpus() *inside* cpu_notifier_register_begin/done(), we avoid the ABBA deadlock possibility mentioned above. Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Cc: Ingo Molnar <mingo@kernel.org> Tested-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-02-14powercap / intel_rapl: spell out SoC namesJacob Pan1-6/+6
Spell out names for supported SoCs. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-02-14powercap / intel_rapl: relax sanity check on energy countersJacob Pan1-0/+5
Some RAPL domains may not be active at the time driver is being loaded. Checking energy counter increment may be too strict and time consuming. So relax the sanity check on energy counters of these domains. Otherwise, they may be ignored and become unavailable to the powercap framework. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-22powercap / RAPL: add support for ValleyView SocJacob Pan1-2/+11
This patch adds support for RAPL on Intel ValleyView based SoC platforms, such as Baytrail. Besides adding CPU ID, special energy unit encoding is handled for ValleyView. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-05PowerCap: Fix mode for energy counterSrinivas Pandruvada1-1/+6
As per the documentation of powercap sysfs, energy_uj field is read only, if it can't be reset. Currently it always allows write but will fail, if there is no reset callback. Changing mode field, to read only if there is no reset callback. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reported-by: Dirk Brandewie <dirk.j.brandewie@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-11-05PowerCap: Fix build error with option -Werror=format-securitySrinivas Pandruvada1-1/+1
Fix compile error with gcc option: -Werror=format-security for dev_set_name(&control_type->dev, name). Changed to dev_set_name(&control_type->dev, "%s", name). Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-10-25PowerCap: Convert class code to use dev_groupsThierry Reding1-5/+7
The newly added power capping framework uses the obsolete .dev_attrs field of struct class. However this field will be removed in 3.13, so convert the code to use the .dev_groups field instead. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-10-18PowerCap: Introduce Intel RAPL power capping driverJacob Pan3-0/+1409
The Intel Running Average Power Limit (RAPL) technology provides platform software with the ability to monitor, control, and get notifications on power usage. This feature is present in all Sandy Bridge and later Intel processors. Newer models allow more fine grained controls to be applied. In RAPL, power control is divided into domains, which include package, DRAM controller, CPU core (Power Plane 0), graphics uncore (power plane 1), etc. The purpose of this driver is to expose the RAPL settings to userspace. Overall, RAPL fits in the new powercap class driver in that platform level power capping controls are exposed via this generic interface. This driver is based on an earlier patch from Zhang Rui. However, while the previous work was mainly focused on thermal monitoring the focus here is on the usability from user space perspective. References: https://lkml.org/lkml/2011/5/26/93 Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-10-17PowerCap: Add class driverSrinivas Pandruvada3-0/+703
The power capping framework providing a consistent interface between the kernel and user space that allows power capping drivers to expose their settings to user space in a uniform way. The overall design of the framework is described in the documentation added by the previous patch in this series. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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