Merge tag 'pm-5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
"These fix the usage of device links in the runtime PM core

Merge tag 'pm-5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
"These fix the usage of device links in the runtime PM core code and
update the DTPM (Dynamic Thermal Power Management) feature added
recently.

Specifics:

- Make the runtime PM core code avoid attempting to suspend supplier
devices before updating the PM-runtime status of a consumer to
'suspended' (Rafael Wysocki).

- Fix DTPM (Dynamic Thermal Power Management) root node
initialization and label that feature as EXPERIMENTAL in Kconfig
(Daniel Lezcano)"

* tag 'pm-5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
powercap/drivers/dtpm: Add the experimental label to the option description
powercap/drivers/dtpm: Fix root node initialization
PM: runtime: Update device status before letting suppliers suspend

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Merge branch 'powercap'

* powercap:
powercap/drivers/dtpm: Add the experimental label to the option description
powercap/drivers/dtpm: Fix root node initialization

powercap/drivers/dtpm: Fix root node initialization

The root node is not set to NULL when the dtpm root node is
removed. Consequently, it is not possible to create a new root
as it is already set.

powercap/drivers/dtpm: Fix root node initialization

The root node is not set to NULL when the dtpm root node is
removed. Consequently, it is not possible to create a new root
as it is already set.

Set the root node to NULL when the last node is removed.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Merge remote-tracking branch 'net/master'

Merge commit '3e10585335b7967326ca7b4118cada0d2d00a2ab' into v5.12/vfio/next

Update to new follow_pte() definition

Merge tag 'pm-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
"These add a new power capping facility allowing aggregat

Merge tag 'pm-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
"These add a new power capping facility allowing aggregate power
constraints to be applied to sets of devices in a distributed manner,
add a new CPU ID to the RAPL power capping driver and improve it, drop
a cpufreq driver belonging to a platform that is not supported any
more, drop two redundant cpufreq driver flags, update cpufreq drivers
(intel_pstate, brcmstb-avs, qcom-hw), update the operating performance
points (OPP) framework (code cleanups, new helpers, devfreq-related
modifications), clean up devfreq, extend the PM clock layer, update
the cpupower utility and make assorted janitorial changes.

Specifics:

- Add new power capping facility called DTPM (Dynamic Thermal Power
Management), based on the existing power capping framework, to
allow aggregate power constraints to be applied to sets of devices
in a distributed manner, along with a CPU backend driver based on
the Energy Model (Daniel Lezcano, Dan Carpenter, Colin Ian King).

- Add AlderLake Mobile support to the Intel RAPL power capping driver
and make it use the topology interface when laying out the system
topology (Zhang Rui, Yunfeng Ye).

- Drop the cpufreq tango driver belonging to a platform that is not
supported any more (Arnd Bergmann).

- Drop the redundant CPUFREQ_STICKY and CPUFREQ_PM_NO_WARN cpufreq
driver flags (Viresh Kumar).

- Update cpufreq drivers:

* Fix max CPU frequency discovery in the intel_pstate driver and
make janitorial changes in it (Chen Yu, Rafael Wysocki, Nigel
Christian).

* Fix resource leaks in the brcmstb-avs-cpufreq driver (Christophe
JAILLET).

* Make the tegra20 driver use the resource-managed API (Dmitry
Osipenko).

* Enable boost support in the qcom-hw driver (Shawn Guo).

- Update the operating performance points (OPP) framework:

* Clean up the OPP core (Dmitry Osipenko, Viresh Kumar).

* Extend the OPP API by adding new helpers to it (Dmitry Osipenko,
Viresh Kumar).

* Allow required OPPs to be used for devfreq devices and update
the devfreq governor code accordingly (Saravana Kannan).

* Prepare the framework for introducing new dev_pm_opp_set_opp()
helper (Viresh Kumar).

* Drop dev_pm_opp_set_bw() and update related drivers (Viresh
Kumar).

* Allow lazy linking of required-OPPs (Viresh Kumar).

- Simplify and clean up devfreq somewhat (Lukasz Luba, Yang Li,
Pierre Kuo).

- Update the generic power domains (genpd) framework:

* Use device's next wakeup to determine domain idle state (Lina
Iyer).

* Improve initialization and debug (Dmitry Osipenko).

* Simplify computations (Abaci Team).

- Make janitorial changes in the core code handling system sleep and
PM-runtime (Bhaskar Chowdhury, Bjorn Helgaas, Rikard Falkeborn,
Zqiang).

- Update the MAINTAINERS entry for the exynos cpuidle driver and drop
DEBUG definition from intel_idle (Krzysztof Kozlowski, Tom Rix).

- Extend the PM clock layer to cover clocks that must sleep (Nicolas
Pitre).

- Update the cpupower utility:

* Update cpupower command, add support for AMD family 0x19 and
clean up the code to remove many of the family checks to make
future family updates easier (Nathan Fontenot, Robert Richter).

* Add Makefile dependencies for install targets to allow building
cpupower in parallel rather than serially (Ivan Babrou).

- Make janitorial changes in power management Kconfig (Lukasz Luba)"

* tag 'pm-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (89 commits)
MAINTAINERS: cpuidle: exynos: include header in file pattern
powercap: intel_rapl: Use topology interface in rapl_init_domains()
powercap: intel_rapl: Use topology interface in rapl_add_package()
PM: sleep: Constify static struct attribute_group
PM: Kconfig: remove unneeded "default n" options
PM: EM: update Kconfig description and drop "default n" option
cpufreq: Remove unused flag CPUFREQ_PM_NO_WARN
cpufreq: Remove CPUFREQ_STICKY flag
PM / devfreq: Add required OPPs support to passive governor
PM / devfreq: Cache OPP table reference in devfreq
OPP: Add function to look up required OPP's for a given OPP
PM / devfreq: rk3399_dmc: Remove unneeded semicolon
opp: Replace ENOTSUPP with EOPNOTSUPP
opp: Fix "foo * bar" should be "foo *bar"
opp: Don't ignore clk_get() errors other than -ENOENT
opp: Update bandwidth requirements based on scaling up/down
opp: Allow lazy-linking of required-opps
opp: Remove dev_pm_opp_set_bw()
devfreq: tegra30: Migrate to dev_pm_opp_set_opp()
drm: msm: Migrate to dev_pm_opp_set_opp()
...

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Merge branches 'powercap' and 'pm-misc'

* powercap:
powercap: intel_rapl: Use topology interface in rapl_init_domains()
powercap: intel_rapl: Use topology interface in rapl_add_package()
power

Merge branches 'powercap' and 'pm-misc'

* powercap:
powercap: intel_rapl: Use topology interface in rapl_init_domains()
powercap: intel_rapl: Use topology interface in rapl_add_package()
powercap/intel_rapl: add support for AlderLake Mobile
powercap/drivers/dtpm: Fix size of object being allocated
powercap/drivers/dtpm: Fix an IS_ERR() vs NULL check
powercap/drivers/dtpm: Fix some missing unlock bugs
powercap/drivers/dtpm: Fix a double shift bug
powercap/drivers/dtpm: Fix __udivdi3 and __aeabi_uldivmod unresolved symbols
powercap/drivers/dtpm: Add CPU energy model based support
powercap/drivers/dtpm: Add API for dynamic thermal power management
Documentation/powercap/dtpm: Add documentation for dtpm
units: Add Watt units

* pm-misc:
PM: Kconfig: remove unneeded "default n" options
PM: EM: update Kconfig description and drop "default n" option

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powercap/drivers/dtpm: Fix an IS_ERR() vs NULL check

The powercap_register_control_type() function never returns NULL, it
returns error pointers on error so update this check.

Fixes: a20d0ef97abf (

powercap/drivers/dtpm: Fix an IS_ERR() vs NULL check

The powercap_register_control_type() function never returns NULL, it
returns error pointers on error so update this check.

Fixes: a20d0ef97abf ("powercap/drivers/dtpm: Add API for dynamic thermal power management")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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powercap/drivers/dtpm: Fix some missing unlock bugs

We need to unlock on these paths before returning.

Fixes: a20d0ef97abf ("powercap/drivers/dtpm: Add API for dynamic thermal power management")
Si

powercap/drivers/dtpm: Fix some missing unlock bugs

We need to unlock on these paths before returning.

Fixes: a20d0ef97abf ("powercap/drivers/dtpm: Add API for dynamic thermal power management")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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powercap/drivers/dtpm: Fix a double shift bug

The DTPM_POWER_LIMIT_FLAG is used for test_bit() etc which take a bit
number so it should be bit 0. But currently it's set to BIT(0) then
that is doubl

powercap/drivers/dtpm: Fix a double shift bug

The DTPM_POWER_LIMIT_FLAG is used for test_bit() etc which take a bit
number so it should be bit 0. But currently it's set to BIT(0) then
that is double shifted equivalent to BIT(BIT(0)). This doesn't cause a
run time problem because it's done consistently.

Fixes: a20d0ef97abf ("powercap/drivers/dtpm: Add API for dynamic thermal power management")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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powercap/drivers/dtpm: Fix __udivdi3 and __aeabi_uldivmod unresolved symbols

32-bit architectures do not support u64 divisions, so the macro
DIV_ROUND_CLOSEST is not adequate as the compiler will re

powercap/drivers/dtpm: Fix __udivdi3 and __aeabi_uldivmod unresolved symbols

32-bit architectures do not support u64 divisions, so the macro
DIV_ROUND_CLOSEST is not adequate as the compiler will replace the
call to an unexisting function for the platform, leading to
unresolved references to symbols.

Fix this by using the compatible macros:

DIV64_U64_ROUND_CLOSEST and DIV_ROUND_CLOSEST_ULL.

Fixes: a20d0ef97abf ("powercap/drivers/dtpm: Add API for dynamic thermal power management")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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powercap/drivers/dtpm: Add API for dynamic thermal power management

On the embedded world, the complexity of the SoC leads to an
increasing number of hotspots which need to be monitored and mitigate

powercap/drivers/dtpm: Add API for dynamic thermal power management

On the embedded world, the complexity of the SoC leads to an
increasing number of hotspots which need to be monitored and mitigated
as a whole in order to prevent the temperature to go above the
normative and legally stated 'skin temperature'.

Another aspect is to sustain the performance for a given power budget,
for example virtual reality where the user can feel dizziness if the
GPU performance is capped while a big CPU is processing something
else. Or reduce the battery charging because the dissipated power is
too high compared with the power consumed by other devices.

The userspace is the most adequate place to dynamically act on the
different devices by limiting their power given an application
profile: it has the knowledge of the platform.

These userspace daemons are in charge of the Dynamic Thermal Power
Management (DTPM).

Nowadays, the dtpm daemons are abusing the thermal framework as they
act on the cooling device state to force a specific and arbitrary
state without taking care of the governor decisions. Given the closed
loop of some governors that can confuse the logic or directly enter in
a decision conflict.

As the number of cooling device support is limited today to the CPU
and the GPU, the dtpm daemons have little control on the power
dissipation of the system. The out of tree solutions are hacking
around here and there in the drivers, in the frameworks to have
control on the devices. The common solution is to declare them as
cooling devices.

There is no unification of the power limitation unit, opaque states
are used.

This patch provides a way to create a hierarchy of constraints using
the powercap framework. The devices which are registered as power
limit-able devices are represented in this hierarchy as a tree. They
are linked together with intermediate nodes which are just there to
propagate the constraint to the children.

The leaves of the tree are the real devices, the intermediate nodes
are virtual, aggregating the children constraints and power
characteristics.

Each node have a weight on a 2^10 basis, in order to reflect the
percentage of power distribution of the children's node. This
percentage is used to dispatch the power limit to the children.

The weight is computed against the max power of the siblings.

This simple approach allows to do a fair distribution of the power
limit.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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