[ Upstream commit 903eb9fb85e32810f376a2858aad77c9298f9488 ]
Only domain root packages can enumerate System (Psys) domain.
Whether a package is domain root or not is described in the Bit 0 of the
Domain Info register.
Add support for Domain Info register and fix the System domain probing
accordingly.
Fixes: 9eef7f9da9 ("powercap: intel_rapl: Introduce RAPL TPMI interface driver")
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Cc: 6.5+ <stable@vger.kernel.org> # 6.5+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit faa9130ce716b286d786d59032bacfd9052c2094 ]
Add the missing Domain Info register. This also fixes the bogus
definition of the Interrupt register.
Neither of these two registers was used previously.
Fixes: 9eef7f9da9 ("powercap: intel_rapl: Introduce RAPL TPMI interface driver")
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Cc: 6.5+ <stable@vger.kernel.org> # 6.5+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 1aa09b9379a7a644cd2f75ae0bac82b8783df600 ]
The RAPL framework uses CPU hotplug locking to protect the rapl_packages
list and rp->lead_cpu to guarantee that
1. the RAPL package device is not unprobed and freed
2. the cached rp->lead_cpu is always valid
for operations like powercap sysfs accesses.
Current RAPL APIs assume being called from CPU hotplug callbacks which
hold the CPU hotplug lock, but TPMI RAPL driver invokes the APIs in the
driver's .probe() function without acquiring the CPU hotplug lock.
Fix the problem by providing both locked and lockless versions of RAPL
APIs.
Fixes: 9eef7f9da9 ("powercap: intel_rapl: Introduce RAPL TPMI interface driver")
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Cc: 6.5+ <stable@vger.kernel.org> # 6.5+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 2d1f5006ff95770da502f8cee2a224a1ff83866e ]
A NULL pointer dereference is triggered when probing the MMIO RAPL
driver on platforms with CPU ID not listed in intel_rapl_common CPU
model list.
This is because the intel_rapl_common module still probes on such
platforms even if 'defaults_msr' is not set after commit 1488ac990a
("powercap: intel_rapl: Allow probing without CPUID match"). Thus the
MMIO RAPL rp->priv->defaults is NULL when registering to RAPL framework.
Fix the problem by adding sanity check to ensure rp->priv->rapl_defaults
is always valid.
Fixes: 1488ac990a ("powercap: intel_rapl: Allow probing without CPUID match")
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Cc: 6.5+ <stable@vger.kernel.org> # 6.5+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit b50155cb0d609437236c88201206267835c6f965 ]
The caller of the function freq_qos_add_request() checks again a non
zero value but freq_qos_add_request() can return '1' if the request
already exists. Therefore, the setup function fails while the QoS
request actually did not failed.
Fix that by changing the check against a negative value like all the
other callers of the function.
Fixes: 0e8f68d7f0 ("Add CPU energy model based support")
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit bdefd9913bdd453991ef756b6f7176e8ad80d786 upstream.
The policy returned by cpufreq_cpu_get() has to be released with
the help of cpufreq_cpu_put() to balance its kobject reference counter
properly.
Add the missing calls to cpufreq_cpu_put() in the code.
Fixes: 0aea2e4ec2 ("powercap/dtpm_cpu: Reset per_cpu variable in the release function")
Fixes: 0e8f68d7f0 ("powercap/drivers/dtpm: Add CPU energy model based support")
Cc: v5.16+ <stable@vger.kernel.org> # v5.16+
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit b817f1488fca548fe50e2654d84a1956a16a1a8a upstream.
The power values coming from the Energy Model are already in uW.
The PowerCap and DTPM frameworks operate on uW, so all places should
just use the values from the EM.
Fix the code by removing all of the conversion to uW still present in it.
Fixes: ae6ccaa650 (PM: EM: convert power field to micro-Watts precision and align drivers)
Cc: 5.19+ <stable@vger.kernel.org> # v5.19+
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit a60ec4485f1c72dfece365cf95e6de82bdd74300 upstream.
Before the refactoring the pr_warn() only triggered when
someone explicitly tried to write to a BIOS locked limit.
After the refactoring the warning is also triggering during
system resume. The user can't do anything about this so
printing scary warnings doesn't make sense
Keep the printk but make it pr_debug() instead of pr_warn()
to make it clear it's not a serious issue.
Fixes: 9050a9cd5e ("powercap: intel_rapl: Cleanup Power Limits support")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: 6.5+ <stable@vger.kernel.org> # 6.5+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
System runs at minimum performance, once powercap RAPL package domain
enabled flag is changed from 1 to 0 to 1.
Setting RAPL package domain enabled flag to 0, results in setting of
power limit 4 (PL4) MSR 0x601 to 0. This implies disabling PL4 limit.
The PL4 limit controls the peak power. So setting 0, results in some
undesirable performance, which depends on hardware implementation.
Even worse, when the enabled flag is set to 1 again. This will set PL4
MSR value to 0x01, which means reduce peak power to 0.125W. This will
force system to run at the lowest possible performance on every PL4
supported system.
Setting enabled flag should only affect the "enable" bit, not other
bits. Here it is changing power limit.
This is caused by a change which assumes that there is an enable bit in
the PL4 MSR like other power limits. Although PL4 enable/disable bit is
present with TPMI RAPL interface, it is not present with the MSR
interface.
There is a rapl_primitive_info defined for non existent PL4 enable bit
and then it is used with the commit 9050a9cd5e ("powercap: intel_rapl:
Cleanup Power Limits support") to enable PL4. This is wrong, hence remove
this rapl primitive for PL4. Also in the function
rapl_detect_powerlimit(), PL_ENABLE is used to check for the presence of
power limits. Replace PL_ENABLE with PL_LIMIT, as PL_LIMIT must be
present. Without this change, PL4 controls will not be available in the
sysfs once rapl primitive for PL4 is removed.
Fixes: 9050a9cd5e ("powercap: intel_rapl: Cleanup Power Limits support")
Suggested-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Tested-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Cc: 6.5+ <stable@vger.kernel.org> # 6.5+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Rework the menu and teo cpuidle governors to avoid calling
tick_nohz_get_sleep_length(), which is likely to become quite
expensive going forward, too often and improve making decisions
regarding whether or not to stop the scheduler tick in the teo
governor (Rafael Wysocki).
- Improve the performance of cpufreq_stats_create_table() in some
cases (Liao Chang).
- Fix two issues in the amd-pstate-ut cpufreq driver (Swapnil Sapkal).
- Use clamp() helper macro to improve the code readability in
cpufreq_verify_within_limits() (Liao Chang).
- Set stale CPU frequency to minimum in intel_pstate (Doug Smythies).
- Migrate cpufreq drivers for various platforms to use void remove
callback (Yangtao Li).
- Add online/offline/exit hooks for Tegra driver (Sumit Gupta).
- Explicitly include correct DT includes in cpufreq (Rob Herring).
- Frequency domain updates for qcom-hw driver (Neil Armstrong).
- Modify AMD pstate driver return the highest_perf value (Meng Li).
- Generic cleanups for cppc, mediatek and powernow driver (Liao Chang,
Konrad Dybcio).
- Add more platforms to cpufreq-arm driver's blocklist (AngeloGioacchino
Del Regno and Konrad Dybcio).
- brcmstb-avs-cpufreq: Fix -Warray-bounds bug (Gustavo A. R. Silva).
- Add device PM helpers to allow a device to remain powered-on during
system-wide transitions (Ulf Hansson).
- Rework hibernation memory snapshotting to avoid storing pages filled
with zeros in hibernation image files (Brian Geffon).
- Add check to make sure that CPU latency QoS constraints do not use
negative values (Clive Lin).
- Optimize rp->domains memory allocation in the Intel RAPL power
capping driver (xiongxin).
- Remove recursion while parsing zones in the arm_scmi power capping
driver (Cristian Marussi).
- Fix memory leak in devfreq_dev_release() (Boris Brezillon).
- Rewrite devfreq_monitor_start() kerneldoc comment (Manivannan
Sadhasivam).
- Explicitly include correct DT includes in devfreq (Rob Herring).
- Remove unsued pm_runtime_update_max_time_suspended() extern
declaration (YueHaibing).
- Add turbo-boost support to cpupower (Wyes Karny).
- Add support for amd_pstate mode change to cpupower (Wyes Karny).
- Fix 'cpupower idle_set' command to accept only numeric values of
arguments (Likhitha Korrapati).
- Clean up OPP code and add new frequency related APIs to it (Viresh
Kumar, Manivannan Sadhasivam).
- Convert ti cpufreq/opp bindings to json schema (Nishanth Menon).
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Merge tag 'pm-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"These rework cpuidle governors to call tick_nohz_get_sleep_length()
less often and fix one of them, rework hibernation to avoid storing
pages filled with zeros in hibernation images, switch over some
cpufreq drivers to use void remove callbacks, fix and clean up
multiple cpufreq drivers, fix the devfreq core, update the cpupower
utility and make other assorted improvements.
Specifics:
- Rework the menu and teo cpuidle governors to avoid calling
tick_nohz_get_sleep_length(), which is likely to become quite
expensive going forward, too often and improve making decisions
regarding whether or not to stop the scheduler tick in the teo
governor (Rafael Wysocki)
- Improve the performance of cpufreq_stats_create_table() in some
cases (Liao Chang)
- Fix two issues in the amd-pstate-ut cpufreq driver (Swapnil Sapkal)
- Use clamp() helper macro to improve the code readability in
cpufreq_verify_within_limits() (Liao Chang)
- Set stale CPU frequency to minimum in intel_pstate (Doug Smythies)
- Migrate cpufreq drivers for various platforms to use void remove
callback (Yangtao Li)
- Add online/offline/exit hooks for Tegra driver (Sumit Gupta)
- Explicitly include correct DT includes in cpufreq (Rob Herring)
- Frequency domain updates for qcom-hw driver (Neil Armstrong)
- Modify AMD pstate driver return the highest_perf value (Meng Li)
- Generic cleanups for cppc, mediatek and powernow driver (Liao
Chang, Konrad Dybcio)
- Add more platforms to cpufreq-arm driver's blocklist
(AngeloGioacchino Del Regno and Konrad Dybcio)
- brcmstb-avs-cpufreq: Fix -Warray-bounds bug (Gustavo A. R. Silva)
- Add device PM helpers to allow a device to remain powered-on during
system-wide transitions (Ulf Hansson)
- Rework hibernation memory snapshotting to avoid storing pages
filled with zeros in hibernation image files (Brian Geffon)
- Add check to make sure that CPU latency QoS constraints do not use
negative values (Clive Lin)
- Optimize rp->domains memory allocation in the Intel RAPL power
capping driver (xiongxin)
- Remove recursion while parsing zones in the arm_scmi power capping
driver (Cristian Marussi)
- Fix memory leak in devfreq_dev_release() (Boris Brezillon)
- Rewrite devfreq_monitor_start() kerneldoc comment (Manivannan
Sadhasivam)
- Explicitly include correct DT includes in devfreq (Rob Herring)
- Remove unsued pm_runtime_update_max_time_suspended() extern
declaration (YueHaibing)
- Add turbo-boost support to cpupower (Wyes Karny)
- Add support for amd_pstate mode change to cpupower (Wyes Karny)
- Fix 'cpupower idle_set' command to accept only numeric values of
arguments (Likhitha Korrapati)
- Clean up OPP code and add new frequency related APIs to it (Viresh
Kumar, Manivannan Sadhasivam)
- Convert ti cpufreq/opp bindings to json schema (Nishanth Menon)"
* tag 'pm-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (74 commits)
cpufreq: tegra194: remove opp table in exit hook
cpufreq: powernow-k8: Use related_cpus instead of cpus in driver.exit()
cpufreq: tegra194: add online/offline hooks
cpuidle: teo: Avoid unnecessary variable assignments
cpufreq: qcom-cpufreq-hw: add support for 4 freq domains
dt-bindings: cpufreq: qcom-hw: add a 4th frequency domain
cpufreq: amd-pstate-ut: Fix kernel panic when loading the driver
cpufreq: amd-pstate-ut: Remove module parameter access
cpufreq: Use clamp() helper macro to improve the code readability
PM: sleep: Add helpers to allow a device to remain powered-on
PM: QoS: Add check to make sure CPU latency is non-negative
PM: runtime: Remove unsued extern declaration of pm_runtime_update_max_time_suspended()
cpufreq: intel_pstate: set stale CPU frequency to minimum
cpufreq: stats: Improve the performance of cpufreq_stats_create_table()
dt-bindings: cpufreq: Convert ti-cpufreq to json schema
dt-bindings: opp: Convert ti-omap5-opp-supply to json schema
OPP: Fix argument name in doc comment
cpuidle: menu: Skip tick_nohz_get_sleep_length() call in some cases
cpufreq: cppc: Set fie_disabled to FIE_DISABLED if fails to create kworker_fie
cpufreq: cppc: cppc_cpufreq_get_rate() returns zero in all error cases.
...
Alderlake N is an E-core only product using Gracemont
micro-architecture. It fits the pre-existing naming scheme perfectly
fine, adhere to it.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230807150405.686834933@infradead.org
In the memory allocation of rp->domains in rapl_detect_domains(), there
is an additional memory of struct rapl_domain allocated, optimize the
code here to save sizeof(struct rapl_domain) bytes of memory.
Test in Intel NUC (i5-1135G7).
Signed-off-by: xiongxin <xiongxin@kylinos.cn>
Tested-by: xiongxin <xiongxin@kylinos.cn>
Reviewed-by: Srinivas Pandruvada<srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Depends on the interface used, the RAPL registers can be either MSR
indexes or memory mapped IO addresses. Current RAPL common code uses u64
to save both MSR and memory mapped IO registers. With this, when
handling register address with an __iomem annotation, it triggers a
sparse warning like below:
sparse warnings: (new ones prefixed by >>)
>> drivers/powercap/intel_rapl_tpmi.c:141:41: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [usertype] *tpmi_rapl_regs @@ got void [noderef] __iomem * @@
drivers/powercap/intel_rapl_tpmi.c:141:41: sparse: expected unsigned long long [usertype] *tpmi_rapl_regs
drivers/powercap/intel_rapl_tpmi.c:141:41: sparse: got void [noderef] __iomem *
Fix the problem by using a union to save the registers instead.
Suggested-by: David Laight <David.Laight@ACULAB.COM>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202307031405.dy3druuy-lkp@intel.com/
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Powercap zones can be defined as arranged in a hierarchy of trees and when
registering a zone with powercap_register_zone(), the kernel powercap
subsystem expects this to happen starting from the root zones down to the
leaves; on the other side, de-registration by powercap_deregister_zone()
must begin from the leaf zones.
Available SCMI powercap zones are retrieved dynamically from the platform
at probe time and, while any defined hierarchy between the zones is
described properly in the zones descriptor, the platform returns the
availables zones with no particular well-defined order: as a consequence,
the trees possibly composing the hierarchy of zones have to be somehow
walked properly to register the retrieved zones from the root.
Currently the ARM SCMI Powercap driver walks the zones using a recursive
algorithm; this approach, even though correct and tested can lead to kernel
stack overflow when processing a returned hierarchy of zones composed by
particularly high trees.
Avoid possible kernel stack overflow by substituting the recursive approach
with an iterative one supported by a dynamically allocated stack-like data
structure.
Fixes: b55eef5226 ("powercap: arm_scmi: Add SCMI Powercap based driver")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Nothing surprising in the SoC specific drivers, with the usual updates:
* Added or improved SoC driver support for Tegra234, Exynos4121, RK3588,
as well as multiple Mediatek and Qualcomm chips
* SCMI firmware gains support for multiple SMC/HVC transport and version
3.2 of the protocol
* Cleanups amd minor changes for the reset controller, memory controller,
firmware and sram drivers
* Minor changes to amd/xilinx, samsung, tegra, nxp, ti, qualcomm,
amlogic and renesas SoC specific drivers
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Merge tag 'soc-drivers-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC driver updates from Arnd Bergmann:
"Nothing surprising in the SoC specific drivers, with the usual
updates:
- Added or improved SoC driver support for Tegra234, Exynos4121,
RK3588, as well as multiple Mediatek and Qualcomm chips
- SCMI firmware gains support for multiple SMC/HVC transport and
version 3.2 of the protocol
- Cleanups amd minor changes for the reset controller, memory
controller, firmware and sram drivers
- Minor changes to amd/xilinx, samsung, tegra, nxp, ti, qualcomm,
amlogic and renesas SoC specific drivers"
* tag 'soc-drivers-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (118 commits)
dt-bindings: interrupt-controller: Convert Amlogic Meson GPIO interrupt controller binding
MAINTAINERS: add PHY-related files to Amlogic SoC file list
drivers: meson: secure-pwrc: always enable DMA domain
tee: optee: Use kmemdup() to replace kmalloc + memcpy
soc: qcom: geni-se: Do not bother about enable/disable of interrupts in secondary sequencer
dt-bindings: sram: qcom,imem: document qdu1000
soc: qcom: icc-bwmon: Fix MSM8998 count unit
dt-bindings: soc: qcom,rpmh-rsc: Require power-domains
soc: qcom: socinfo: Add Soc ID for IPQ5300
dt-bindings: arm: qcom,ids: add SoC ID for IPQ5300
soc: qcom: Fix a IS_ERR() vs NULL bug in probe
soc: qcom: socinfo: Add support for new fields in revision 19
soc: qcom: socinfo: Add support for new fields in revision 18
dt-bindings: firmware: scm: Add compatible for SDX75
soc: qcom: mdt_loader: Fix split image detection
dt-bindings: memory-controllers: drop unneeded quotes
soc: rockchip: dtpm: use C99 array init syntax
firmware: tegra: bpmp: Add support for DRAM MRQ GSCs
soc/tegra: pmc: Use devm_clk_notifier_register()
soc/tegra: pmc: Simplify debugfs initialization
...
The devm_ioremap_resource() function returns error pointers on error,
it never returns NULL. Update the check accordingly.
Fixes: 9eef7f9da9 ("powercap: intel_rapl: Introduce RAPL TPMI interface driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
After commit 3382388d71 ("intel_rapl: abstract RAPL common code"),
accessing to IOSF_MBI interface is done in the RAPL common code.
Thus it is the CONFIG_INTEL_RAPL_CORE that has dependency of
CONFIG_IOSF_MBI, while CONFIG_INTEL_RAPL_MSR does not.
This problem was not exposed previously because all the previous RAPL
common code users, aka, the RAPL MSR and MMIO I/F drivers, have
CONFIG_IOSF_MBI selected.
Fix the CONFIG_IOSF_MBI dependency in RAPL code. This also fixes a build
time failure when the RAPL TPMI I/F driver is introduced without
selecting CONFIG_IOSF_MBI.
x86_64-linux-ld: vmlinux.o: in function `set_floor_freq_atom':
intel_rapl_common.c:(.text+0x2dac9b8): undefined reference to `iosf_mbi_write'
x86_64-linux-ld: intel_rapl_common.c:(.text+0x2daca66): undefined reference to `iosf_mbi_read'
Reference to iosf_mbi.h is also removed from the RAPL MSR I/F driver.
Fixes: 3382388d71 ("intel_rapl: abstract RAPL common code")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/all/20230601213246.3271412-1-arnd@kernel.org
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The current initialization of the struct x86_cpu_id via
pl4_support_ids[] is partial and wrong. It is initializing
"stepping" field with "X86_FEATURE_ANY" instead of "feature" field.
Use X86_MATCH_INTEL_FAM6_MODEL macro instead of initializing
each field of the struct x86_cpu_id for pl4_supported list of CPUs.
This X86_MATCH_INTEL_FAM6_MODEL macro internally uses another macro
X86_MATCH_VENDOR_FAM_MODEL_FEATURE for X86 based CPU matching with
appropriate initialized values.
Reported-by: Dave Hansen <dave.hansen@intel.com>
Link: https://lore.kernel.org/lkml/28ead36b-2d9e-1a36-6f4e-04684e420260@intel.com
Fixes: eb52bc2ae5 ("powercap: RAPL: Add Power Limit4 support for Meteor Lake SoC")
Fixes: b08b95cf30 ("powercap: RAPL: Add Power Limit4 support for Alder Lake-N and Raptor Lake-P")
Fixes: 5157559069 ("powercap: RAPL: Add Power Limit4 support for RaptorLake")
Fixes: 1cc5b9a411 ("powercap: Add Power Limit4 support for Alder Lake SoC")
Fixes: 8365a898fe ("powercap: Add Power Limit4 support")
Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The TPMI (Topology Aware Register and PM Capsule Interface) provides a
flexible, extendable and PCIe enumerable MMIO interface for PM features.
Intel RAPL (Running Average Power Limit) is one of the features that
benefit from this. Using TPMI Interface has advantage over traditional MSR
(Model Specific Register) interface, where a thread needs to be scheduled
on the target CPU to read or write. Also the RAPL features vary between
CPU models, and hence lot of model specific code. Here TPMI provides an
architectural interface by providing hierarchical tables and fields,
which will not need any model specific implementation.
TPMI interface uses a PCI VSEC structure to expose the location of MMIO
interface for PM feature enumeration and control.
The Intel VSEC driver parses VSEC structures present in the PCI
configuration space of the given device and creates an auxiliary device
object for each of them. In particular, it creates an auxiliary device
object representing TPMI that can be bound to by an auxiliary driver.
Then the TPMI enumeration driver binds to the TPMI auxiliary device
object created by the Intel VSEC driver, parses the PM Feature Structure
(PFS) present in the TPMI MMIO region and creates device nodes for PM
features described in the PFS.
This RAPL TPMI Interface driver binds the RAPL auxiliary device created
by the TPMI enumeration driver and expose the RAPL control to userspace
via powercap sysfs class.
RAPL TPMI details are published in the following document:
https://github.com/intel/tpmi_power_management/blob/main/RAPL_TPMI_public_disclosure_FINAL.docx
Note, for now, the RAPL TPMI Interface and RAPL MSR Interface cannot
co-exists on the same platform (RAPL TPMI Interface is not supported on
any platforms in the CPU model list for RAPL MSR Interface). Thus
register the RAPL TPMI powercap control type with name "intel-rapl",
the same as RAPL MSR Interface, so that it is transparent to userspace.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Compared with existing RAPL MSR/MMIO Interface, the RAPL TPMI Interface
1. has per Power Limit register, thus has per Power Limit Lock and
Enable bit.
2. doesn't have Power Limit Clamp bit.
3. the Power Limit Lock and Enable bits have different bit offsets.
These mean RAPL TPMI Interface needs its own primitive information.
RAPL TPMI Interface also has per domain unit register but with a
different register layout. This requires a TPMI specific rapl_defaults
call to decode the unit register.
Introduce the RAPL core support for TPMI Interface.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Different RAPL Interfaces may have different primitive information and
rapl_defaults calls.
To better distinguish this difference in the RAPL framework code,
introduce a new enum to represent different types of RAPL Interfaces.
No functional change.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
MSR RAPL Interface always removes a rapl_package when all the CPUs in
that rapl_package are offlined. This is because it relies on an online
CPU to access the MSR.
But for RAPL Interface using MMIO registers, when all the cpus within
the rapl_package are offlined,
1. the register can still be accessed
2. monitoring and setting the Power Pimits for the rapl_package is still
meaningful because of uncore power.
This means that, a valid rapl_package doesn't rely on one or more cpus
being onlined.
For this sense, make cpu optional for rapl_package. A rapl_package can
be registered either using a CPU id to represent the physical
package/die, or using the physical package id directly.
Note that, the thermal throttling interrupt is not disabled via
MSR_IA32_PACKAGE_THERM_INTERRUPT for such rapl_package at the moment.
If it is still needed in the future, this can be achieved by selecting
an onlined CPU using the physical package id.
Note that, processor_thermal_rapl, the current MMIO RAPL Interface
driver, can also be converted to register using a package id instead.
But this is not done right now because processor_thermal_rapl driver
works on single-package systems only, and offlining the only package
will not happen. So keep the previous logic.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
For rapl_packages that rely on online CPUs to work, rp->lead_cpu always
has a valid CPU id.
Remove the redundant cpu parameter in rapl_check_domain(),
rapl_detect_domains() and .check_unit() callbacks.
No functional change.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
With RAPL MSR/MMIO Interface, each RAPL domain has one Power Limit
register. Each Power Limit register has one lock bit which tells the OS
if the power limit register can be used or not.
Depending on the number of power limits supported by the power limit
register, the lock bit may apply to one or more power limits.
With RAPL TPMI Interface, each RAPL domain has multiple Power Limits,
and each Power Limit has its own register, with a lock bit.
To handle this, introduce support for lock bit per Power Limit.
For existing RAPL MSR/MMIO Interfaces, the lock bit in the Power Limit
register applies to all the Power Limits controlled by this register.
Remove the per domain DOMAIN_STATE_BIOS_LOCKED flag at the same time
because it can be replaced by the per Power Limit lock.
No functional change intended.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The same set of operations are shared by different Powert Limits,
including Power Limit get/set, Power Limit enable/disable, clamping
enable/disable, time window get/set, and max power get/set, etc.
But the same operation for different Power Limit has different
primitives because they use different registers/register bits.
A lot of dirty/duplicate code was introduced to handle this difference.
Introduce a universal way to issue Power Limit operations.
Instead of using hardcoded primitive name directly, use Power Limit id
+ operation type, and hide all the Power Limit difference details in a
central place, get_pl_prim(). Two helpers, rapl_read_pl_data() and
rapl_write_pl_data(), are introduced at the same time to simplify the
code for issuing Power Limit operations.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Currently, a RAPL package is registered with the number of Power Limits
supported in each RAPL domain. But this doesn't tell which Power Limits
are available. Using the number of Power Limits supported to guess the
availability of each Power Limit is fragile.
Use bitmap to represent the availability of each Power Limit.
Note that PL1 is mandatory thus it does not need to be set explicitly by
the RAPL Interface drivers.
No functional change intended.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The same set of operations are shared by different Powert Limits,
including Power Limit get/set, Power Limit enable/disable, clamping
enable/disable, time window get/set, and max power get/set, etc.
But the same operation for different Power Limit has different
primitives because they use different registers/register bits.
A lot of dirty/duplicate code was introduced to handle this difference.
Instead of using hardcoded primitive name directly, using Power Limit id
+ operation type is much cleaner.
For this sense, move POWER_LIMIT1/POWER_LIMIT2/POWER_LIMIT4 to the
beginning of enum rapl_primitives so that they can be reused as
Power Limit ids.
No functional change.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Currently, the RAPL primitive information array is required to be
initialized in the order of enum rapl_primitives.
This can break easily, especially when different RAPL Interfaces may
support different sets of primitives.
Convert the code to initialize the primitive information using array
index explicitly.
No functional change.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
RAPL MSR/MMIO Interface has package scope unit register but some RAPL
domains like Dram/Psys may use a fixed energy unit value instead of the
default unit value on certain platforms.
RAPL TPMI Interface supports per domain unit register.
For the above reasons, add support for per domain unit register and per
domain energy/power/time unit.
When per domain unit register is not available, use the package scope
unit register as the per domain unit register for each RAPL domain so
that this change is transparent to MSR/MMIO Interface.
No functional change intended.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
RAPL primitive information is Interface specific.
Although current MSR and MMIO Interface share the same RAPL primitives,
new Interface like TPMI has its own RAPL primitive information.
Save the primitive information in the Interface private structure.
Plus, using variant name "rp" for struct rapl_primitive_info is
confusing because "rp" is also used for struct rapl_package.
Use "rpi" as the variant name for struct rapl_primitive_info, and rename
the previous rpi[] array to avoid conflict.
No functional change.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
rapl_defaults is Interface specific.
Although current MSR and MMIO Interface share the same rapl_defaults,
new Interface like TPMI need its own rapl_defaults callbacks.
Save the rapl_defaults information in the Interface private structure.
No functional change.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Currently, CPU model checks is used to
1. get proper rapl_defaults callbacks for RAPL MSR/MMIO Interface.
2. create a platform device node for the intel_rapl_msr driver to probe.
Both of these are only mandatory for the RAPL MSR/MMIO Interface.
Make the CPUID match optional.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Fix error handling in the apple-soc cpufreq driver (Dan Carpenter).
- Change the log level of a message in the amd-pstate cpufreq driver
so it is more visible to users (Kai-Heng Feng).
- Adjust the balance_performance EPP value for Sapphire Rapids in the
intel_pstate cpufreq driver (Srinivas Pandruvada).
- Remove MODULE_LICENSE from 3 pieces of non-modular code (Nick Alcock).
- Make a read-only kobj_type structure in the schedutil cpufreq governor
constant (Thomas Weißschuh).
- Add Add Power Limit4 support for Meteor Lake SoC to the Intel RAPL
power capping driver (Sumeet Pawnikar).
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Merge tag 'pm-6.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These update power capping (new hardware support and cleanup) and
cpufreq (bug fixes, cleanups and intel_pstate adjustment for a new
platform).
Specifics:
- Fix error handling in the apple-soc cpufreq driver (Dan Carpenter)
- Change the log level of a message in the amd-pstate cpufreq driver
so it is more visible to users (Kai-Heng Feng)
- Adjust the balance_performance EPP value for Sapphire Rapids in the
intel_pstate cpufreq driver (Srinivas Pandruvada)
- Remove MODULE_LICENSE from 3 pieces of non-modular code (Nick
Alcock)
- Make a read-only kobj_type structure in the schedutil cpufreq
governor constant (Thomas Weißschuh)
- Add Add Power Limit4 support for Meteor Lake SoC to the Intel RAPL
power capping driver (Sumeet Pawnikar)"
* tag 'pm-6.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: apple-soc: Fix an IS_ERR() vs NULL check
powercap: remove MODULE_LICENSE in non-modules
cpufreq: intel_pstate: remove MODULE_LICENSE in non-modules
powercap: RAPL: Add Power Limit4 support for Meteor Lake SoC
cpufreq: amd-pstate: remove MODULE_LICENSE in non-modules
cpufreq: schedutil: make kobj_type structure constant
cpufreq: amd-pstate: Let user know amd-pstate is disabled
cpufreq: intel_pstate: Adjust balance_performance EPP for Sapphire Rapids
Since commit 8b41fc4454 ("kbuild: create modules.builtin without
Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations
are used to identify modules. As a consequence, uses of the macro
in non-modules will cause modprobe to misidentify their containing
object file as a module when it is not (false positives), and modprobe
might succeed rather than failing with a suitable error message.
So remove it in the files in this commit, none of which can be built as
modules.
Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Suggested-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add Meteor Lake SoC to the list of processor models for which
Power Limit4 is supported by the Intel RAPL driver.
Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Rework a large bunch of drivers to use the generic thermal trip
structure and use the opportunity to do more cleanups by removing
unused functions from the OF code (Daniel Lezcano).
- Remove core header inclusion from drivers (Daniel Lezcano).
- Fix some locking issues related to the generic thermal trip rework
(Johan Hovold).
- Fix a crash when requesting the critical temperature on tegra, which
is related to the generic trip point work (Jon Hunter).
- Clean up thermal device unregistration code (Viresh Kumar).
- Fix and clean up thermal control core initialization error code
paths (Daniel Lezcano).
- Relocate the trip points handling code into a separate file (Daniel
Lezcano).
- Make the thermal core fail registration of thermal zones and cooling
devices if the thermal class has not been registered (Rafael Wysocki).
- Add trip point initialization helper functions for ACPI-defined trip
points and modify two thermal drivers to use them (Rafael Wysocki,
Daniel Lezcano).
- Make the core thermal control code use sysfs_emit_at() instead of
scnprintf() where applicable (ye xingchen).
- Consolidate code accessing the Intel TCC (Thermal Control Circuitry)
MSRs by introducing library functions for that and making the
TCC-related code in thermal drivers use them (Zhang Rui).
- Enhance the x86_pkg_temp_thermal driver to support dynamic tjmax
changes (Zhang Rui).
- Address an "unsigned expression compared with zero" warning in the
intel_soc_dts_iosf thermal driver (Yang Li).
- Update comments regarding two functions in the Intel Menlow thermal
driver (Deming Wang).
- Use sysfs_emit_at() instead of scnprintf() in the int340x thermal
driver (ye xingchen).
- Make the intel_pch thermal driver support the Wellsburg PCH (Tim
Zimmermann).
- Modify the intel_pch and processor_thermal_device_pci thermal drivers
use generic trip point tables instead of thermal zone trip point
callbacks (Daniel Lezcano).
- Add production mode attribute sysfs attribute to the int340x thermal
driver (Srinivas Pandruvada).
- Rework dynamic trip point updates handling and locking in the int340x
thermal driver (Rafael Wysocki).
- Make the int340x thermal driver use a generic trip points table
instead of thermal zone trip point callbacks (Rafael Wysocki, Daniel
Lezcano).
- Clean up and improve the int340x thermal driver (Rafael Wysocki).
- Simplify and clean up the intel_pch thermal driver (Rafael Wysocki).
- Fix the Intel powerclamp thermal driver and make it use the common
idle injection framework (Srinivas Pandruvada).
- Add two module parameters, cpumask and max_idle, to the Intel powerclamp
thermal driver to allow it to affect only a specific subset of CPUs
instead of all of them (Srinivas Pandruvada).
- Make the Intel quark_dts thermal driver Use generic trip point
objects instead of its own trip point representation (Daniel
Lezcano).
- Add toctree entry for thermal documents and fix two issues in the
Intel powerclamp driver documentation (Bagas Sanjaya).
- Use strscpy() to instead of strncpy() in the thermal core (Xu Panda).
- Fix thermal_sampling_exit() (Vincent Guittot).
- Add Mediatek Low Voltage Thermal Sensor (LVTS) driver (Balsam Chihi).
- Add r8a779g0 RCar support to the rcar_gen3 thermal driver (Geert
Uytterhoeven).
- Fix useless call to set_trips() when resuming in the rcar_gen3
thermal control driver and add interrupt support detection at init
time to it (Niklas Söderlund).
- Fix memory corruption in the hi3660 thermal driver (Yongqin Liu).
- Fix include path for libnl3 in pkg-config file for libthermal (Vibhav
Pant).
- Remove syscfg-based driver for st as the platform is not supported
any more (Alain Volmat).
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Merge tag 'thermal-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull thermal control updates from Rafael Wysocki:
"The majority of changes here are related to the general switch-over to
using arrays of generic trip point structures registered along with a
thermal zone instead of trip point callbacks (this has been done
mostly by Daniel Lezcano with some help from yours truly on the Intel
drivers front).
Apart from that and the related reorganization of code, there are some
enhancements of the existing driver and a new Mediatek Low Voltage
Thermal Sensor (LVTS) driver. The Intel powerclamp undergoes a major
rework so it will use the generic idle_inject facility for CPU idle
time injection going forward and it will take additional module
parameters for specifying the subset of CPUs to be affected by it
(work done by Srinivas Pandruvada).
Also included are assorted fixes and a whole bunch of cleanups.
Specifics:
- Rework a large bunch of drivers to use the generic thermal trip
structure and use the opportunity to do more cleanups by removing
unused functions from the OF code (Daniel Lezcano)
- Remove core header inclusion from drivers (Daniel Lezcano)
- Fix some locking issues related to the generic thermal trip rework
(Johan Hovold)
- Fix a crash when requesting the critical temperature on tegra,
which is related to the generic trip point work (Jon Hunter)
- Clean up thermal device unregistration code (Viresh Kumar)
- Fix and clean up thermal control core initialization error code
paths (Daniel Lezcano)
- Relocate the trip points handling code into a separate file (Daniel
Lezcano)
- Make the thermal core fail registration of thermal zones and
cooling devices if the thermal class has not been registered
(Rafael Wysocki)
- Add trip point initialization helper functions for ACPI-defined
trip points and modify two thermal drivers to use them (Rafael
Wysocki, Daniel Lezcano)
- Make the core thermal control code use sysfs_emit_at() instead of
scnprintf() where applicable (ye xingchen)
- Consolidate code accessing the Intel TCC (Thermal Control
Circuitry) MSRs by introducing library functions for that and
making the TCC-related code in thermal drivers use them (Zhang Rui)
- Enhance the x86_pkg_temp_thermal driver to support dynamic tjmax
changes (Zhang Rui)
- Address an "unsigned expression compared with zero" warning in the
intel_soc_dts_iosf thermal driver (Yang Li)
- Update comments regarding two functions in the Intel Menlow thermal
driver (Deming Wang)
- Use sysfs_emit_at() instead of scnprintf() in the int340x thermal
driver (ye xingchen)
- Make the intel_pch thermal driver support the Wellsburg PCH (Tim
Zimmermann)
- Modify the intel_pch and processor_thermal_device_pci thermal
drivers use generic trip point tables instead of thermal zone trip
point callbacks (Daniel Lezcano)
- Add production mode attribute sysfs attribute to the int340x
thermal driver (Srinivas Pandruvada)
- Rework dynamic trip point updates handling and locking in the
int340x thermal driver (Rafael Wysocki)
- Make the int340x thermal driver use a generic trip points table
instead of thermal zone trip point callbacks (Rafael Wysocki,
Daniel Lezcano)
- Clean up and improve the int340x thermal driver (Rafael Wysocki)
- Simplify and clean up the intel_pch thermal driver (Rafael Wysocki)
- Fix the Intel powerclamp thermal driver and make it use the common
idle injection framework (Srinivas Pandruvada)
- Add two module parameters, cpumask and max_idle, to the Intel
powerclamp thermal driver to allow it to affect only a specific
subset of CPUs instead of all of them (Srinivas Pandruvada)
- Make the Intel quark_dts thermal driver Use generic trip point
objects instead of its own trip point representation (Daniel
Lezcano)
- Add toctree entry for thermal documents and fix two issues in the
Intel powerclamp driver documentation (Bagas Sanjaya)
- Use strscpy() to instead of strncpy() in the thermal core (Xu
Panda)
- Fix thermal_sampling_exit() (Vincent Guittot)
- Add Mediatek Low Voltage Thermal Sensor (LVTS) driver (Balsam
Chihi)
- Add r8a779g0 RCar support to the rcar_gen3 thermal driver (Geert
Uytterhoeven)
- Fix useless call to set_trips() when resuming in the rcar_gen3
thermal control driver and add interrupt support detection at init
time to it (Niklas Söderlund)
- Fix memory corruption in the hi3660 thermal driver (Yongqin Liu)
- Fix include path for libnl3 in pkg-config file for libthermal
(Vibhav Pant)
- Remove syscfg-based driver for st as the platform is not supported
any more (Alain Volmat)"
* tag 'thermal-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (135 commits)
thermal/drivers/st: Remove syscfg based driver
thermal: Remove core header inclusion from drivers
tools/lib/thermal: Fix include path for libnl3 in pkg-config file.
thermal/drivers/hisi: Drop second sensor hi3660
thermal/drivers/rcar_gen3_thermal: Fix device initialization
thermal/drivers/rcar_gen3_thermal: Create device local ops struct
thermal/drivers/rcar_gen3_thermal: Do not call set_trips() when resuming
thermal/drivers/rcar_gen3: Add support for R-Car V4H
dt-bindings: thermal: rcar-gen3-thermal: Add r8a779g0 support
thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver
dt-bindings: thermal: mediatek: Add LVTS thermal controllers
thermal/drivers/mediatek: Relocate driver to mediatek folder
tools/lib/thermal: Fix thermal_sampling_exit()
Documentation: powerclamp: Fix numbered lists formatting
Documentation: powerclamp: Escape wildcard in cpumask description
Documentation: admin-guide: Add toctree entry for thermal docs
thermal: intel: powerclamp: Add two module parameters
Documentation: admin-guide: Move intel_powerclamp documentation
thermal: core: Use sysfs_emit_at() instead of scnprintf()
thermal: intel: powerclamp: Fix duration module parameter
...
When setting the power limit time window, software updates the 'y' bits
and 'f' bits in the power limit register, and the value hardware takes
follows the formula below
Time window = 2 ^ y * (1 + f / 4) * Time_Unit
When handling large time window input from userspace, using left
shifting breaks in two cases:
1. when ilog2(value) is bigger than 31, in expression "1 << y", left
shifting by more than 31 bits has undefined behavior. This breaks
'y'. For example, on an Alderlake platform, "1 << 32" returns 1.
2. when ilog2(value) equals 31, "1 << 31" returns negative value
because '1' is recognized as signed int. And this breaks 'f'.
Given that 'y' has 5 bits and hardware can never take a value larger
than 31, fix the first problem by clamp the time window to the maximum
possible value that the hardware can take.
Fix the second problem by using unsigned bit left shift.
Note that hardware has its own maximum time window limitation, which
may be lower than the time window value retrieved from the power limit
register. When this happens, hardware clamps the input to its maximum
time window limitation. That is why a software clamp is preferred to
handle the problem on hand.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
[ rjw: Adjusted the comment added by this change ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The powercap/idle_inject core uses play_idle_precise() to inject idle
time. But play_idle_precise() can't ensure that the CPU is fully idle
for the specified duration because of wakeups due to interrupts. To
compensate for the reduced idle time due to these wakes, the caller
can adjust requested idle time for the next cycle.
The goal of idle injection is to keep system at some idle percent on
average, so this is fine to overshoot or undershoot instantaneous idle
times.
The idle inject core provides an interface idle_inject_set_duration()
to set idle and runtime duration.
Some architectures provide interface to get actual idle time observed
by the hardware. So, the effective idle percent can be adjusted using
the hardware feedback. For example, Intel CPUs provides package idle
counters, which is currently used by Intel powerclamp driver to
readjust runtime duration.
When the caller's desired idle time over a period is less or greater
than the actual CPU idle time observed by the hardware, caller can
readjust idle and runtime duration for the next cycle.
The only way this can be done currently is by monitoring hardware idle
time from a different software thread and readjust idle and runtime
duration using idle_inject_set_duration().
This can be avoided by adding a callback which callers can register and
readjust from this callback function.
Add a capability to register an optional update() callback, which can be
called from the idle inject core before waking up CPUs for idle injection.
This callback can be registered via a new interface:
idle_inject_register_full().
During this process of constantly adjusting idle and runtime duration
there can be some cases where actual idle time is more than the desired.
In this case idle inject can be skipped for a cycle. If update() callback
returns false, then the idle inject core skips waking up CPUs for the
idle injection.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Export symbols for external interfaces, so that they can be used in
other loadable modules.
Export is done under name space IDLE_INJECT.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The users of the idle injection framework allow 100% idle injection. For
example: thermal/cpuidle_cooling.c driver. When the ratio is set to
100%, the runtime_duration becomes zero.
However, idle_inject_set_duration() in the idle injection framework
silently ignores run_duration_us == 0 without any error (it is a void
function). The caller will then assume that everything is fine and
100% idle is effective, but in reality the idle duration will not
change.
There are two options:
- The caller may change their max state to 99% instead of 100% and
document that 100% is not supported by the idle inject framework.
- Add 100% idle support to the idle inject framework.
Since there are other protections via RT throttling, this framework can
allow 100% idle. The RT throttling will be activated at 95% idle by
default. The caller disabling RT throttling and injecting 100% idle,
should be aware that CPU can't be used at all.
The idle inject timer is started for (run_duration_us + idle_duration_us)
duration. Hence replace (run_duration_us && idle_duration_us) with
(run_duration_us + idle_duration_us) in the function
idle_inject_set_duration(). Also check for !(run_duration_us +
idle_duration_us) to return -EINVAL in idle_inject_start().
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add Emerald Rapids to the list of supported processor models in the
Intel RAPL power capping driver.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add Meteor Lake to the list of supported processor models in the
Intel RAPL power capping driver.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
In the error path after calling dev_set_name(), the device
name is leaked. To fix this, calling dev_set_name() before
device_register(), and call put_device() if it returns error.
All the resources is released in powercap_release(), so it
can return from powercap_register_zone() directly.
Fixes: 75d2364ea0 ("PowerCap: Add class driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Fix following warning at three places:
Function parameter or member 'ii_dev' not described.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
strtobool() is the same as kstrtobool().
However, the latter is more used within the kernel.
In order to remove strtobool() and slightly simplify kstrtox.h, switch to
the other function name.
While at it, include the corresponding header file (<linux/kstrtox.h>)
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add a powercap driver that, using the ARM SCMI Protocol to query the SCMI
platform firmware for the list of existing Powercap domains, registers all
of such discovered domains under the new 'arm-scmi' powercap control type.
A new simple powercap zone and constraint is registered for all the SCMI
powercap zones that are found.
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Debuggability:
- Change most occurances of BUG_ON() to WARN_ON_ONCE()
- Reorganize & fix TASK_ state comparisons, turn it into a bitmap
- Update/fix misc scheduler debugging facilities
- Load-balancing & regular scheduling:
- Improve the behavior of the scheduler in presence of lot of
SCHED_IDLE tasks - in particular they should not impact other
scheduling classes.
- Optimize task load tracking, cleanups & fixes
- Clean up & simplify misc load-balancing code
- Freezer:
- Rewrite the core freezer to behave better wrt thawing and be simpler
in general, by replacing PF_FROZEN with TASK_FROZEN & fixing/adjusting
all the fallout.
- Deadline scheduler:
- Fix the DL capacity-aware code
- Factor out dl_task_is_earliest_deadline() & replenish_dl_new_period()
- Relax/optimize locking in task_non_contending()
- Cleanups:
- Factor out the update_current_exec_runtime() helper
- Various cleanups, simplifications
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2022-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"Debuggability:
- Change most occurances of BUG_ON() to WARN_ON_ONCE()
- Reorganize & fix TASK_ state comparisons, turn it into a bitmap
- Update/fix misc scheduler debugging facilities
Load-balancing & regular scheduling:
- Improve the behavior of the scheduler in presence of lot of
SCHED_IDLE tasks - in particular they should not impact other
scheduling classes.
- Optimize task load tracking, cleanups & fixes
- Clean up & simplify misc load-balancing code
Freezer:
- Rewrite the core freezer to behave better wrt thawing and be
simpler in general, by replacing PF_FROZEN with TASK_FROZEN &
fixing/adjusting all the fallout.
Deadline scheduler:
- Fix the DL capacity-aware code
- Factor out dl_task_is_earliest_deadline() &
replenish_dl_new_period()
- Relax/optimize locking in task_non_contending()
Cleanups:
- Factor out the update_current_exec_runtime() helper
- Various cleanups, simplifications"
* tag 'sched-core-2022-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (41 commits)
sched: Fix more TASK_state comparisons
sched: Fix TASK_state comparisons
sched/fair: Move call to list_last_entry() in detach_tasks
sched/fair: Cleanup loop_max and loop_break
sched/fair: Make sure to try to detach at least one movable task
sched: Show PF_flag holes
freezer,sched: Rewrite core freezer logic
sched: Widen TAKS_state literals
sched/wait: Add wait_event_state()
sched/completion: Add wait_for_completion_state()
sched: Add TASK_ANY for wait_task_inactive()
sched: Change wait_task_inactive()s match_state
freezer,umh: Clean up freezer/initrd interaction
freezer: Have {,un}lock_system_sleep() save/restore flags
sched: Rename task_running() to task_on_cpu()
sched/fair: Cleanup for SIS_PROP
sched/fair: Default to false in test_idle_cores()
sched/fair: Remove useless check in select_idle_core()
sched/fair: Avoid double search on same cpu
sched/fair: Remove redundant check in select_idle_smt()
...
Zhang Rui