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2021-09-07Revert "cpufreq: intel_pstate: Process HWP Guaranteed change notification"Rafael J. Wysocki1-39/+0
Revert commit d0e936adbd22 ("cpufreq: intel_pstate: Process HWP Guaranteed change notification"), because it causes a NULL pointer dereference to occur on Lenovo X1 gen9 laptops due to an HWP guaranteed performance change interrupt arriving prematurely. This feature will be revisited in the next cycle. Reported-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-09-06cpufreq: mediatek-hw: Add support for CPUFREQ HWHector.Yuan3-0/+321
Introduce cpufreq HW driver which can support CPU frequency adjust in MT6779 platform. Signed-off-by: Hector.Yuan <hector.yuan@mediatek.com> [ Viresh: Massaged the patch and cleaned some stuff. ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-09-03Merge tag 'powerpc-5.15-1' of ↵Linus Torvalds1-2/+14
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - Convert pseries & powernv to use MSI IRQ domains. - Rework the pseries CPU numbering so that CPUs that are removed, and later re-added, are given a CPU number on the same node as previously, when possible. - Add support for a new more flexible device-tree format for specifying NUMA distances. - Convert powerpc to GENERIC_PTDUMP. - Retire sbc8548 and sbc8641d board support. - Various other small features and fixes. Thanks to Alexey Kardashevskiy, Aneesh Kumar K.V, Anton Blanchard, Cédric Le Goater, Christophe Leroy, Emmanuel Gil Peyrot, Fabiano Rosas, Fangrui Song, Finn Thain, Gautham R. Shenoy, Hari Bathini, Joel Stanley, Jordan Niethe, Kajol Jain, Laurent Dufour, Leonardo Bras, Lukas Bulwahn, Marc Zyngier, Masahiro Yamada, Michal Suchanek, Nathan Chancellor, Nicholas Piggin, Parth Shah, Paul Gortmaker, Pratik R. Sampat, Randy Dunlap, Sebastian Andrzej Siewior, Srikar Dronamraju, Wan Jiabing, Xiongwei Song, and Zheng Yongjun. * tag 'powerpc-5.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (154 commits) powerpc/bug: Cast to unsigned long before passing to inline asm powerpc/ptdump: Fix generic ptdump for 64-bit KVM: PPC: Fix clearing never mapped TCEs in realmode powerpc/pseries/iommu: Rename "direct window" to "dma window" powerpc/pseries/iommu: Make use of DDW for indirect mapping powerpc/pseries/iommu: Find existing DDW with given property name powerpc/pseries/iommu: Update remove_dma_window() to accept property name powerpc/pseries/iommu: Reorganize iommu_table_setparms*() with new helper powerpc/pseries/iommu: Add ddw_property_create() and refactor enable_ddw() powerpc/pseries/iommu: Allow DDW windows starting at 0x00 powerpc/pseries/iommu: Add ddw_list_new_entry() helper powerpc/pseries/iommu: Add iommu_pseries_alloc_table() helper powerpc/kernel/iommu: Add new iommu_table_in_use() helper powerpc/pseries/iommu: Replace hard-coded page shift powerpc/numa: Update cpu_cpu_map on CPU online/offline powerpc/numa: Print debug statements only when required powerpc/numa: convert printk to pr_xxx powerpc/numa: Drop dbg in favour of pr_debug powerpc/smp: Enable CACHE domain for shared processor powerpc/smp: Update cpu_core_map on all PowerPc systems ...
2021-09-02cpufreq: Remove ready() callbackViresh Kumar1-4/+0
This isn't used anymore, get rid of it. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-09-02cpufreq: sh: Remove sh_cpufreq_cpu_ready()Viresh Kumar1-11/+0
The ->ready() callback is going away and since we don't do any important stuff in sh_cpufreq_cpu_ready(), remove it. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-09-02cpufreq: acpi: Remove acpi_cpufreq_cpu_ready()Viresh Kumar1-11/+3
The ready() callback was implemented earlier for acpi-cpufreq driver as we wanted to use policy->cpuinfo.max_freq for which the policy was required to be verified. That is no longer the case and we can do the pr_warn() right from ->init() callback now. Remove acpi_cpufreq_cpu_ready(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-08-31Merge branch 'cpufreq/arm/linux-next' of ↵Rafael J. Wysocki10-54/+217
git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm Pull ARM cpufreq driver changes for v5.15 from Viresh Kumar: "This contains: - Update cpufreq-dt blocklist with more platforms (Bjorn Andersson). - Allow freq changes from any CPU for qcom-hw driver (Taniya Das). - Add DSVS interrupt's support for qcom-hw driver (Thara Gopinath). - A new callback (->register_em()) to register EM at a more convenient point of time." * 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: cpufreq: qcom-hw: Set dvfs_possible_from_any_cpu cpufreq driver flag cpufreq: blocklist more Qualcomm platforms in cpufreq-dt-platdev cpufreq: qcom-cpufreq-hw: Add dcvs interrupt support cpufreq: scmi: Use .register_em() to register with energy model cpufreq: vexpress: Use .register_em() to register with energy model cpufreq: scpi: Use .register_em() to register with energy model cpufreq: qcom-cpufreq-hw: Use .register_em() to register with energy model cpufreq: omap: Use .register_em() to register with energy model cpufreq: mediatek: Use .register_em() to register with energy model cpufreq: imx6q: Use .register_em() to register with energy model cpufreq: dt: Use .register_em() to register with energy model cpufreq: Add callback to register with energy model cpufreq: vexpress: Set CPUFREQ_IS_COOLING_DEV flag
2021-08-30cpufreq: qcom-hw: Set dvfs_possible_from_any_cpu cpufreq driver flagTaniya Das1-0/+1
As remote cpufreq updates are supported on QCOM platforms, set dvfs_possible_from_any_cpu cpufreq driver flag. Signed-off-by: Taniya Das <tdas@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-30cpufreq: blocklist more Qualcomm platforms in cpufreq-dt-platdevBjorn Andersson1-0/+4
The Qualcomm sa8155p, sm6350, sm8250 and sm8350 platforms also uses the qcom-cpufreq-hw driver, so add them to the cpufreq-dt-platdev driver's blocklist. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-30cpufreq: qcom-cpufreq-hw: Add dcvs interrupt supportThara Gopinath1-0/+147
Add interrupt support to notify the kernel of h/w initiated frequency throttling by LMh. Convey this to scheduler via thermal presssure interface. Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> [Viresh: Added changes for arch_topology.c to fix build errors ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-30cpufreq: scmi: Use .register_em() to register with energy modelViresh Kumar1-23/+42
Set the newly added .register_em() callback to register with the EM after the cpufreq policy is properly initialized. Acked-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-30cpufreq: vexpress: Use .register_em() to register with energy modelViresh Kumar1-2/+1
Set the newly added .register_em() callback with cpufreq_register_em_with_opp() to register with the EM core. Acked-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-30cpufreq: scpi: Use .register_em() to register with energy modelViresh Kumar1-2/+1
Set the newly added .register_em() callback with cpufreq_register_em_with_opp() to register with the EM core. Acked-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-25cpufreq: intel_pstate: Process HWP Guaranteed change notificationSrinivas Pandruvada1-0/+39
It is possible that HWP guaranteed ratio is changed in response to change in power and thermal limits. For example when Intel Speed Select performance profile is changed or there is change in TDP, hardware can send notifications. It is possible that the guaranteed ratio is increased. This creates an issue when turbo is disabled, as the old limits set in MSR_HWP_REQUEST are still lower and hardware will clip to older limits. This change enables HWP interrupt and process HWP interrupts. When guaranteed is changed, calls cpufreq_update_policy() so that driver callbacks are called to update to new HWP limits. This callback is called from a delayed workqueue of 10ms to avoid frequent updates. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-08-23Merge back cpufreq changes for v5.15.Rafael J. Wysocki6-14/+14
2021-08-17Merge branch 'cpufreq/arm/fixes' of ↵Rafael J. Wysocki3-2/+8
git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm Pull ARM cpufreq fixes for v5.14 from Viresh Kumar: "This contains: - Addition of SoCs to blocklist for cpufreq-dt driver (Bjorn Andersson and Thara Gopinath). - Fix error path for scmi driver (Lukasz Luba). - Temporarily disable highest frequency for armada, its unsafe and breaks stuff." * 'cpufreq/arm/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: cpufreq: armada-37xx: forbid cpufreq for 1.2 GHz variant cpufreq: blocklist Qualcomm sm8150 in cpufreq-dt-platdev cpufreq: arm_scmi: Fix error path when allocation failed cpufreq: blacklist Qualcomm sc8180x in cpufreq-dt-platdev
2021-08-13cpufreq: powernv: Fix init_chip_info initialization in numa=offPratik R. Sampat1-2/+14
In the numa=off kernel command-line configuration init_chip_info() loops around the number of chips and attempts to copy the cpumask of that node which is NULL for all iterations after the first chip. Hence, store the cpu mask for each chip instead of derving cpumask from node while populating the "chips" struct array and copy that to the chips[i].mask Fixes: 053819e0bf84 ("cpufreq: powernv: Handle throttling due to Pmax capping at chip level") Cc: stable@vger.kernel.org # v4.3+ Reported-by: Shirisha Ganta <shirisha.ganta1@ibm.com> Signed-off-by: Pratik R. Sampat <psampat@linux.ibm.com> Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> [mpe: Rename goto label to out_free_chip_cpu_mask] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210728120500.87549-2-psampat@linux.ibm.com
2021-08-12cpufreq: qcom-cpufreq-hw: Use .register_em() to register with energy modelViresh Kumar1-2/+1
Set the newly added .register_em() callback with cpufreq_register_em_with_opp() to register with the EM core. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-12cpufreq: omap: Use .register_em() to register with energy modelViresh Kumar1-1/+1
Set the newly added .register_em() callback with cpufreq_register_em_with_opp() to register with the EM core. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-12cpufreq: mediatek: Use .register_em() to register with energy modelViresh Kumar1-2/+1
Set the newly added .register_em() callback with cpufreq_register_em_with_opp() to register with the EM core. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-12cpufreq: imx6q: Use .register_em() to register with energy modelViresh Kumar1-1/+1
Set the newly added .register_em() callback with cpufreq_register_em_with_opp() to register with the EM core. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-12cpufreq: dt: Use .register_em() to register with energy modelViresh Kumar1-2/+1
Set the newly added .register_em() callback with cpufreq_register_em_with_opp() to register with the EM core. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-12cpufreq: Add callback to register with energy modelViresh Kumar1-0/+13
Many cpufreq drivers register with the energy model for each policy and do exactly the same thing. Follow the footsteps of thermal-cooling, to get it done from the cpufreq core itself. Provide a new callback, which will be called, if present, by the cpufreq core at the right moment (more on that in the code's comment). Also provide a generic implementation that uses dev_pm_opp_of_register_em(). This also allows us to register with the EM at a later point of time, compared to ->init(), from where the EM core can access cpufreq policy directly using cpufreq_cpu_get() type of helpers and perform other work, like marking few frequencies inefficient, this will be done separately. Reviewed-by: Quentin Perret <qperret@google.com> Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-12cpufreq: vexpress: Set CPUFREQ_IS_COOLING_DEV flagViresh Kumar1-19/+3
Reuse the cpufreq core's registration of cooling device by setting the CPUFREQ_IS_COOLING_DEV flag. Set this only if bL switcher isn't enabled. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-09cpufreq: armada-37xx: forbid cpufreq for 1.2 GHz variantMarek Behún1-1/+5
The 1.2 GHz variant of the Armada 3720 SOC is unstable with DVFS: when the SOC boots, the WTMI firmware sets clocks and AVS values that work correctly with 1.2 GHz CPU frequency, but random crashes occur once cpufreq driver starts scaling. We do not know currently what is the reason: - it may be that the voltage value for L0 for 1.2 GHz variant provided by the vendor in the OTP is simply incorrect when scaling is used, - it may be that some delay is needed somewhere, - it may be something else. The most sane solution now seems to be to simply forbid the cpufreq driver on 1.2 GHz variant. Signed-off-by: Marek Behún <kabel@kernel.org> Fixes: 92ce45fb875d ("cpufreq: Add DVFS support for Armada 37xx") Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-05cpufreq: blocklist Qualcomm sm8150 in cpufreq-dt-platdevThara Gopinath1-0/+1
The Qualcomm sm8150 platform uses the qcom-cpufreq-hw driver, so add it to the cpufreq-dt-platdev driver's blocklist. Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-08-04cpufreq: Replace deprecated CPU-hotplug functionsSebastian Andrzej Siewior6-14/+14
The functions get_online_cpus() and put_online_cpus() have been deprecated during the CPU hotplug rework. They map directly to cpus_read_lock() and cpus_read_unlock(). Replace deprecated CPU-hotplug functions with the official version. The behavior remains unchanged. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-08-04cpufreq: arm_scmi: Fix error path when allocation failedLukasz Luba1-1/+1
Stop the initialization when cpumask allocation failed and return an error. Fixes: 80a064dbd556 ("scmi-cpufreq: Get opp_shared_cpus from opp-v2 for EM") Signed-off-by: Lukasz Luba <lukasz.luba@arm.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-07-26cpufreq: blacklist Qualcomm sc8180x in cpufreq-dt-platdevBjorn Andersson1-0/+1
The Qualcomm SC8180x platform uses the qcom-cpufreq-hw driver, so it in the cpufreq-dt-platdev driver's blocklist. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-07-13cpufreq: Fix fall-through warning for ClangGustavo A. R. Silva1-2/+0
In preparation to enable -Wimplicit-fallthrough for Clang, fix a fallthrough warning by simply dropping the empty default case at the bottom. Link: https://github.com/KSPP/linux/issues/115 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2021-07-01Merge branch 'cpufreq/arm/linux-next' of ↵Rafael J. Wysocki5-31/+282
git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm Pull ARM cpufreq updates for v5.14-rc1 from Viresh Kumar: "- Add frequency invariance support for CPPC driver again and related fixes/changes." - Minor changes/cleanups for Meditak driver (Fabien Parent and Seiya Wang), Qcom platform (Sibi Sankar), and SCMI driver (Christophe JAILLET). - New bindings for generic performance domains (Sudeep Holla). - Rename black/white-lists (Viresh Kumar)." * 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: cpufreq: CPPC: Add support for frequency invariance arch_topology: Avoid use-after-free for scale_freq_data cpufreq: CPPC: Pass structure instance by reference cpufreq: CPPC: Fix potential memleak in cppc_cpufreq_cpu_init dt-bindings: cpufreq: update cpu type and clock name for MT8173 SoC clk: mediatek: remove deprecated CLK_INFRA_CA57SEL for MT8173 SoC cpufreq: dt: Rename black/white-lists cpufreq: scmi: Fix an error message cpufreq: mediatek: add support for mt8365 dt-bindings: dvfs: Add support for generic performance domains cpufreq: blacklist SC7280 in cpufreq-dt-platdev
2021-07-01Merge branch 'cpufreq/cppc-fie' into cpufreq/arm/linux-nextViresh Kumar8-136/+382
2021-07-01cpufreq: CPPC: Add support for frequency invarianceViresh Kumar2-13/+249
The Frequency Invariance Engine (FIE) is providing a frequency scaling correction factor that helps achieve more accurate load-tracking. Normally, this scaling factor can be obtained directly with the help of the cpufreq drivers as they know the exact frequency the hardware is running at. But that isn't the case for CPPC cpufreq driver. Another way of obtaining that is using the arch specific counter support, which is already present in kernel, but that hardware is optional for platforms. This patch updates the CPPC driver to register itself with the topology core to provide its own implementation (cppc_scale_freq_tick()) of topology_scale_freq_tick() which gets called by the scheduler on every tick. Note that the arch specific counters have higher priority than CPPC counters, if available, though the CPPC driver doesn't need to have any special handling for that. On an invocation of cppc_scale_freq_tick(), we schedule an irq work (since we reach here from hard-irq context), which then schedules a normal work item and cppc_scale_freq_workfn() updates the per_cpu arch_freq_scale variable based on the counter updates since the last tick. To allow platforms to disable this CPPC counter-based frequency invariance support, this is all done under CONFIG_ACPI_CPPC_CPUFREQ_FIE, which is enabled by default. This also exports sched_setattr_nocheck() as the CPPC driver can be built as a module. Cc: linux-acpi@vger.kernel.org Tested-by: Vincent Guittot <vincent.guittot@linaro.org> Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com> Tested-by: Qian Cai <quic_qiancai@quicinc.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-07-01cpufreq: CPPC: Pass structure instance by referenceViresh Kumar1-8/+8
Don't pass structure instance by value, pass it by reference instead. Tested-by: Vincent Guittot <vincent.guittot@linaro.org> Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com> Tested-by: Qian Cai <quic_qiancai@quicinc.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-07-01cpufreq: CPPC: Fix potential memleak in cppc_cpufreq_cpu_initViresh Kumar1-8/+20
It's a classic example of memleak, we allocate something, we fail and never free the resources. Make sure we free all resources on policy ->init() failures. Fixes: a28b2bfc099c ("cppc_cpufreq: replace per-cpu data array with a list") Tested-by: Vincent Guittot <vincent.guittot@linaro.org> Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com> Tested-by: Qian Cai <quic_qiancai@quicinc.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-06-30cpufreq: Remove ->resolve_freq()Viresh Kumar1-13/+8
Commit e3c062360870 ("cpufreq: add cpufreq_driver_resolve_freq()") introduced this callback, back in 2016, for drivers that provide the ->target() callback. The kernel hasn't seen a single user of it in the past 5 years and it is not likely to be used any time soon. Remove it for now. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> [ rjw: Changelog edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-06-30cpufreq: Reuse cpufreq_driver_resolve_freq() in __cpufreq_driver_target()Viresh Kumar1-20/+22
__cpufreq_driver_target() open codes cpufreq_driver_resolve_freq(), lets make the former reuse the later. Separate out __resolve_freq() to accept relation as well as an argument and use it at both the locations. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-06-30cpufreq: Remove the ->stop_cpu() driver callbackViresh Kumar1-3/+0
Now that all users of ->stop_cpu() have been migrated to using other callbacks, drop it from the core. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> [ rjw: Minor edits in the subject and changelog ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-06-30cpufreq: powernv: Migrate to ->exit() callback instead of ->stop_cpu()Viresh Kumar1-14/+9
Commit 367dc4aa932b ("cpufreq: Add stop CPU callback to cpufreq_driver interface") added the ->stop_cpu() callback to allow the drivers to do clean up before the CPU is completely down and its state can't be modified. At that time the CPU hotplug framework used to call the cpufreq core's registered notifier for different events like CPU_DOWN_PREPARE and CPU_POST_DEAD. The ->stop_cpu() callback was called during the CPU_DOWN_PREPARE event. This is no longer the case, cpuhp_cpufreq_offline() is called only once by the CPU hotplug core now and we don't really need two separate callbacks for cpufreq drivers, i.e. ->stop_cpu() and ->exit(), as everything can be done from the ->exit() callback itself. Migrate to using the ->exit() callback instead of ->stop_cpu(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> [ rjw: Minor changelog edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-06-30cpufreq: CPPC: Migrate to ->exit() callback instead of ->stop_cpu()Viresh Kumar1-22/+24
Commit 367dc4aa932b ("cpufreq: Add stop CPU callback to cpufreq_driver interface") added the ->stop_cpu() callback to allow the drivers to do clean up before the CPU is completely down and its state can't be modified. At that time the CPU hotplug framework used to call the cpufreq core's registered notifier for different events like CPU_DOWN_PREPARE and CPU_POST_DEAD. The ->stop_cpu() callback was called during the CPU_DOWN_PREPARE event. This is no longer the case, cpuhp_cpufreq_offline() is called only once by the CPU hotplug core now and we don't really need two separate callbacks for cpufreq drivers, i.e. ->stop_cpu() and -<exit(), as everything can be done from the ->exit() callback itself. Migrate to using the ->exit() callback instead of ->stop_cpu(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> [ rjw: Minor edits in the changelog and subject ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-06-30cpufreq: intel_pstate: Combine ->stop_cpu() and ->offline()Rafael J. Wysocki1-6/+5
Combine the ->stop_cpu() and ->offline() callback routines for intel_pstate in the active mode so as to avoid setting the ->stop_cpu callback pointer which is going to be dropped from the framework. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-06-23cpufreq: Make cpufreq_online() call driver->offline() on errorsRafael J. Wysocki1-1/+10
In the CPU removal path the ->offline() callback provided by the driver is always invoked before ->exit(), but in the cpufreq_online() error path it is not, so ->exit() is expected to somehow know the context in which it has been called and act accordingly. That is less than straightforward, so make cpufreq_online() invoke the driver's ->offline() callback, if present, on errors before ->exit() too. This only potentially affects intel_pstate. Fixes: 91a12e91dc39 ("cpufreq: Allow light-weight tear down and bring up of CPUs") Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-06-21Merge back cpufreq material for v5.14.Rafael J. Wysocki5-34/+237
2021-06-14Revert "cpufreq: CPPC: Add support for frequency invariance"Viresh Kumar2-243/+12
This reverts commit 4c38f2df71c8e33c0b64865992d693f5022eeaad. There are few races in the frequency invariance support for CPPC driver, namely the driver doesn't stop the kthread_work and irq_work on policy exit during suspend/resume or CPU hotplug. A proper fix won't be possible for the 5.13-rc, as it requires a lot of changes. Lets revert the patch instead for now. Fixes: 4c38f2df71c8 ("cpufreq: CPPC: Add support for frequency invariance") Reported-by: Qian Cai <quic_qiancai@quicinc.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-06-07cpufreq: loongson2: Remove unused linux/sched.h headersHailong Liu1-1/+0
Since commit 759f534e93ac(CPUFREQ: Loongson2: drop set_cpus_allowed_ptr()), the header <linux/sched.h> is useless in oongson2_cpufreq.c, so remove it. Signed-off-by: Hailong Liu <liu.hailong6@zte.com.cn> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-06-07cpufreq: sh: Remove unused linux/sched.h headersHailong Liu1-1/+0
Since commit '205dcc1ecbc5(cpufreq/sh: Replace racy task affinity logic)' the header <linux/sched.h> is useless in sh-cpufreq.c, so remove it. Signed-off-by: Hailong Liu <liu.hailong6@zte.com.cn> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-06-07cpufreq: stats: Clean up local variable in cpufreq_stats_create_table()Shaokun Zhang1-3/+2
Local variable 'count' will be initialized and 'ret' is also not required, so remove the redundant initialization and get rid of 'ret'. Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-06-07cpufreq: intel_pstate: hybrid: Fix build with CONFIG_ACPI unsetRafael J. Wysocki1-43/+48
One of the previous commits introducing hybrid processor support to intel_pstate broke build with CONFIG_ACPI unset. Fix that and while at it make empty stubs of two functions related to ACPI CPPC static inline and fix a spelling mistake in the name of one of them. Fixes: eb3693f0521e ("cpufreq: intel_pstate: hybrid: CPU-specific scaling factor") Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reported-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
2021-05-24cpufreq: dt: Rename black/white-listsViresh Kumar1-4/+4
Rename them in accordance with the coding guidelines. Reviewed-by: Rafael J. Wysocki <rafael@kernel.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-05-21cpufreq: sc520_freq: add 'fallthrough' to one caseRandy Dunlap1-0/+1
Quieten an implicit-fallthrough warning in sc520_freq.c: ../drivers/cpufreq/sc520_freq.c: In function 'sc520_freq_get_cpu_frequency': ../include/linux/printk.h:343:2: warning: this statement may fall through [-Wimplicit-fallthrough=] printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) ../drivers/cpufreq/sc520_freq.c:43:3: note: in expansion of macro 'pr_err' pr_err("error: cpuctl register has unexpected value %02x\n", ../drivers/cpufreq/sc520_freq.c:45:2: note: here case 0x01: Fixes: bf6fc9fd2d848 ("[CPUFREQ] AMD Elan SC520 cpufreq driver.") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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