- Implement the SCHED_DEADLINE server infrastructure - Daniel Bristot de Oliveira's
last major contribution to the kernel:
"SCHED_DEADLINE servers can help fixing starvation issues of low priority
tasks (e.g., SCHED_OTHER) when higher priority tasks monopolize CPU
cycles. Today we have RT Throttling; DEADLINE servers should be able to
replace and improve that."
(Daniel Bristot de Oliveira, Peter Zijlstra, Joel Fernandes,
Youssef Esmat, Huang Shijie)
- Preparatory changes for sched_ext integration:
- Use set_next_task(.first) where required
- Fix up set_next_task() implementations
- Clean up DL server vs. core sched
- Split up put_prev_task_balance()
- Rework pick_next_task()
- Combine the last put_prev_task() and the first set_next_task()
- Rework dl_server
- Add put_prev_task(.next)
(Peter Zijlstra, with a fix by Tejun Heo)
- Complete the EEVDF transition and refine EEVDF scheduling:
- Implement delayed dequeue
- Allow shorter slices to wakeup-preempt
- Use sched_attr::sched_runtime to set request/slice suggestion
- Document the new feature flags
- Remove unused and duplicate-functionality fields
- Simplify & unify pick_next_task_fair()
- Misc debuggability enhancements
(Peter Zijlstra, with fixes/cleanups by Dietmar Eggemann,
Valentin Schneider and Chuyi Zhou)
- Initialize the vruntime of a new task when it is first enqueued,
resulting in significant decrease in latency of newly woken tasks.
(Zhang Qiao)
- Introduce SM_IDLE and an idle re-entry fast-path in __schedule()
(K Prateek Nayak, Peter Zijlstra)
- Clean up and clarify the usage of Clean up usage of rt_task()
(Qais Yousef)
- Preempt SCHED_IDLE entities in strict cgroup hierarchies
(Tianchen Ding)
- Clarify the documentation of time units for deadline scheduler
parameters. (Christian Loehle)
- Remove the HZ_BW chicken-bit feature flag introduced a year ago,
the original change seems to be working fine.
(Phil Auld)
- Misc fixes and cleanups (Chen Yu, Dan Carpenter, Huang Shijie,
Peilin He, Qais Yousefm and Vincent Guittot)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2024-09-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
- Implement the SCHED_DEADLINE server infrastructure - Daniel Bristot
de Oliveira's last major contribution to the kernel:
"SCHED_DEADLINE servers can help fixing starvation issues of low
priority tasks (e.g., SCHED_OTHER) when higher priority tasks
monopolize CPU cycles. Today we have RT Throttling; DEADLINE
servers should be able to replace and improve that."
(Daniel Bristot de Oliveira, Peter Zijlstra, Joel Fernandes, Youssef
Esmat, Huang Shijie)
- Preparatory changes for sched_ext integration:
- Use set_next_task(.first) where required
- Fix up set_next_task() implementations
- Clean up DL server vs. core sched
- Split up put_prev_task_balance()
- Rework pick_next_task()
- Combine the last put_prev_task() and the first set_next_task()
- Rework dl_server
- Add put_prev_task(.next)
(Peter Zijlstra, with a fix by Tejun Heo)
- Complete the EEVDF transition and refine EEVDF scheduling:
- Implement delayed dequeue
- Allow shorter slices to wakeup-preempt
- Use sched_attr::sched_runtime to set request/slice suggestion
- Document the new feature flags
- Remove unused and duplicate-functionality fields
- Simplify & unify pick_next_task_fair()
- Misc debuggability enhancements
(Peter Zijlstra, with fixes/cleanups by Dietmar Eggemann, Valentin
Schneider and Chuyi Zhou)
- Initialize the vruntime of a new task when it is first enqueued,
resulting in significant decrease in latency of newly woken tasks
(Zhang Qiao)
- Introduce SM_IDLE and an idle re-entry fast-path in __schedule()
(K Prateek Nayak, Peter Zijlstra)
- Clean up and clarify the usage of Clean up usage of rt_task()
(Qais Yousef)
- Preempt SCHED_IDLE entities in strict cgroup hierarchies
(Tianchen Ding)
- Clarify the documentation of time units for deadline scheduler
parameters (Christian Loehle)
- Remove the HZ_BW chicken-bit feature flag introduced a year ago,
the original change seems to be working fine (Phil Auld)
- Misc fixes and cleanups (Chen Yu, Dan Carpenter, Huang Shijie,
Peilin He, Qais Yousefm and Vincent Guittot)
* tag 'sched-core-2024-09-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits)
sched/cpufreq: Use NSEC_PER_MSEC for deadline task
cpufreq/cppc: Use NSEC_PER_MSEC for deadline task
sched/deadline: Clarify nanoseconds in uapi
sched/deadline: Convert schedtool example to chrt
sched/debug: Fix the runnable tasks output
sched: Fix sched_delayed vs sched_core
kernel/sched: Fix util_est accounting for DELAY_DEQUEUE
kthread: Fix task state in kthread worker if being frozen
sched/pelt: Use rq_clock_task() for hw_pressure
sched/fair: Move effective_cpu_util() and effective_cpu_util() in fair.c
sched/core: Introduce SM_IDLE and an idle re-entry fast-path in __schedule()
sched: Add put_prev_task(.next)
sched: Rework dl_server
sched: Combine the last put_prev_task() and the first set_next_task()
sched: Rework pick_next_task()
sched: Split up put_prev_task_balance()
sched: Clean up DL server vs core sched
sched: Fixup set_next_task() implementations
sched: Use set_next_task(.first) where required
sched/fair: Properly deactivate sched_delayed task upon class change
...
* Move the calculation of the AMD boost numerator outside of
amd-pstate, correcting acpi-cpufreq on systems with preferred cores
* Harden preferred core detection to avoid potential false positives
* Add extra unit test coverage for mode state machine
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Merge tag 'amd-pstate-v6.12-2024-09-11' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux
Merge the second round of amd-pstate changes for 6.12 from Mario
Limonciello:
"* Move the calculation of the AMD boost numerator outside of
amd-pstate, correcting acpi-cpufreq on systems with preferred cores
* Harden preferred core detection to avoid potential false positives
* Add extra unit test coverage for mode state machine"
* tag 'amd-pstate-v6.12-2024-09-11' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
cpufreq/amd-pstate-ut: Fix an "Uninitialized variables" issue
cpufreq/amd-pstate-ut: Add test case for mode switches
cpufreq/amd-pstate: Export symbols for changing modes
amd-pstate: Add missing documentation for `amd_pstate_prefcore_ranking`
cpufreq: amd-pstate: Add documentation for `amd_pstate_hw_prefcore`
cpufreq: amd-pstate: Optimize amd_pstate_update_limits()
cpufreq: amd-pstate: Merge amd_pstate_highest_perf_set() into amd_get_boost_ratio_numerator()
x86/amd: Detect preferred cores in amd_get_boost_ratio_numerator()
x86/amd: Move amd_get_highest_perf() out of amd-pstate
ACPI: CPPC: Adjust debug messages in amd_set_max_freq_ratio() to warn
ACPI: CPPC: Drop check for non zero perf ratio
x86/amd: Rename amd_get_highest_perf() to amd_get_boost_ratio_numerator()
ACPI: CPPC: Adjust return code for inline functions in !CONFIG_ACPI_CPPC_LIB
x86/amd: Move amd_get_highest_perf() from amd.c to cppc.c
Using uninitialized value "mode2" when calling "amd_pstate_get_mode_string".
Set "mode2" to "AMD_PSTATE_DISABLE" by default.
Signed-off-by: Qianqiang Liu <qianqiang.liu@163.com>
Link: https://lore.kernel.org/r/20240910233923.46470-1-qianqiang.liu@163.com
Acked-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
There is a state machine in the amd-pstate driver utilized for
switches for all modes. To make sure that cleanup and setup works
properly for each mode add a unit test case that tries all
combinations.
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
In order to effectively test all mode switch combinations export
everything necessarily for amd-pstate-ut to trigger a mode switch.
Reviewed-by: Perry Yuan <Perry.Yuan@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Don't take and release the mutex when prefcore isn't present and
avoid initialization of variables that will be initially set
in the function.
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
The special case in amd_pstate_highest_perf_set() is the value used
for calculating the boost numerator. Merge this into
amd_get_boost_ratio_numerator() and then use that to calculate boost
ratio.
This allows dropping more special casing of the highest perf value.
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
AMD systems that support preferred cores will use "166" as their
numerator for max frequency calculations instead of "255".
Add a function for detecting preferred cores by looking at the
highest perf value on all cores.
If preferred cores are enabled return 166 and if disabled the
value in the highest perf register. As the function will be called
multiple times, cache the values for the boost numerator and if
preferred cores will be enabled in global variables.
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
amd_pstate_get_highest_perf() is a helper used to get the highest perf
value on AMD systems. It's used in amd-pstate as part of preferred
core handling, but applicable for acpi-cpufreq as well.
Move it out to cppc handling code as amd_get_highest_perf().
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
The function name is ambiguous because it returns an intermediate value
for calculating maximum frequency rather than the CPPC 'Highest Perf'
register.
Rename the function to clarify its use and allow the function to return
errors. Adjust the consumer in acpi-cpufreq to catch errors.
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Convert the cppc deadline task attributes to use the available
definitions to make them more readable.
No functional change.
Signed-off-by: Christian Loehle <christian.loehle@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Juri Lelli <juri.lelli@redhat.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20240813144348.1180344-4-christian.loehle@arm.com
- Several OF related cleanups in cpufreq drivers (Rob Herring).
- Enable COMPILE_TEST for ARM drivers (Rob Herrring).
- Introduce quirks for syscon failures and use socinfo to get revision
for TI cpufreq driver (Dhruva Gole and Nishanth Menon).
- Minor cleanups in amd-pstate driver (Anastasia Belova and Dhananjay
Ugwekar).
- Minor cleanups for loongson, cpufreq-dt and powernv cpufreq drivers
(Danila Tikhonov, Huacai Chen, and Liu Jing).
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Merge tag 'cpufreq-arm-updates-6.12' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Merge ARM cpufreq updates for 6.12 from Viresh Kumar:
"- Several OF related cleanups in cpufreq drivers (Rob Herring).
- Enable COMPILE_TEST for ARM drivers (Rob Herrring).
- Introduce quirks for syscon failures and use socinfo to get revision
for TI cpufreq driver (Dhruva Gole and Nishanth Menon).
- Minor cleanups in amd-pstate driver (Anastasia Belova and Dhananjay
Ugwekar).
- Minor cleanups for loongson, cpufreq-dt and powernv cpufreq drivers
(Danila Tikhonov, Huacai Chen, and Liu Jing)."
* tag 'cpufreq-arm-updates-6.12' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
cpufreq: ti-cpufreq: Use socinfo to get revision in AM62 family
cpufreq: Fix the cacography in powernv-cpufreq.c
cpufreq: ti-cpufreq: Introduce quirks to handle syscon fails appropriately
cpufreq: loongson3: Use raw_smp_processor_id() in do_service_request()
cpufreq: amd-pstate: add check for cpufreq_cpu_get's return value
cpufreq: Add SM7325 to cpufreq-dt-platdev blocklist
cpufreq: Fix warning on unused of_device_id tables for !CONFIG_OF
cpufreq/amd-pstate: Add the missing cpufreq_cpu_put()
cpufreq: Drop CONFIG_ARM and CONFIG_ARM64 dependency on Arm drivers
cpufreq: Enable COMPILE_TEST on Arm drivers
cpufreq: armada-8k: Avoid excessive stack usage
cpufreq: omap: Drop asm includes
cpufreq: qcom: Add explicit io.h include for readl/writel_relaxed
cpufreq: spear: Use of_property_for_each_u32() instead of open coding
cpufreq: Use of_property_present()
* Validate return of any attempt to update EPP limits, which fixes
the masking hardware problems.
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Merge tag 'amd-pstate-v6.12-2024-09-04' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux
Merge an amd-pstate driver update for 6.12 from Mario Limonciello:
"amd-pstate development for 6.12:
* Validate return of any attempt to update EPP limits, which fixes
the masking hardware problems."
* tag 'amd-pstate-v6.12-2024-09-04' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
cpufreq/amd-pstate: Catch failures for amd_pstate_epp_update_limit()
amd_pstate_set_epp() calls cppc_set_epp_perf() which can fail for
a variety of reasons but this is ignored. Change the return flow
to allow failures.
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
In the AM62x, AM62Ax, and AM62Px devices, we already have the revision
info within the k3-socinfo driver. Hence, re-use this information from
there instead of re using the offset for 2 drivers trying to get the
same information ie. revision.
Signed-off-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Commit b4bc9f9e27 ("cpufreq: ti-cpufreq: add support for omap34xx
and omap36xx") introduced special handling for OMAP3 class devices
where syscon node may not be present. However, this also creates a bug
where the syscon node is present, however the offset used to read
is beyond the syscon defined range.
Fix this by providing a quirk option that is populated when such
special handling is required. This allows proper failure for all other
platforms when the syscon node and efuse offsets are mismatched.
Fixes: b4bc9f9e27 ("cpufreq: ti-cpufreq: add support for omap34xx and omap36xx")
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Use raw_smp_processor_id() instead of plain smp_processor_id() in
do_service_request(), otherwise we may get some errors with the driver
enabled:
BUG: using smp_processor_id() in preemptible [00000000] code: (udev-worker)/208
caller is loongson3_cpufreq_probe+0x5c/0x250 [loongson3_cpufreq]
Reported-by: Xi Ruoyao <xry111@xry111.site>
Tested-by: Binbin Zhou <zhoubinbin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
cpufreq_cpu_get may return NULL. To avoid NULL-dereference check it
and return in case of error.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Anastasia Belova <abelova@astralinux.ru>
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The Qualcomm SM7325 platform uses the qcom-cpufreq-hw driver, so add
it to the cpufreq-dt-platdev driver's blocklist.
Signed-off-by: Danila Tikhonov <danila@jiaxyga.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
!CONFIG_OF builds cause warnings on unused of_device_id tables. This is
due to of_match_node() being a macro rather than static inline function.
Add a __maybe_unused annotation to the of_device_id tables.
Fixes: c7582ec85342 ("cpufreq: Drop CONFIG_ARM and CONFIG_ARM64 dependency on Arm drivers")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202408090714.wcrqU6Pk-lkp@intel.com/
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Fix the reference counting of cpufreq_policy object in amd_pstate_update()
function by adding the missing cpufreq_cpu_put().
Fixes: e8f555daac ("cpufreq/amd-pstate: fix setting policy current frequency value")
Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The CONFIG_ARM and CONFIG_ARM64 dependency is redundant as all the
drivers have necessary sub-arch dependency and don't depend on the
architecture support.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
COMPILE_TEST is useful for build testing without requiring a specific
architecture's compiler. Enable it for most of the Arm CPUFreq drivers.
As Kconfig.arm is only included on ARM and ARM64, COMPILE_TEST is only
enabled for those architectures until that is dropped.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Make intel_pstate use the HWP_HIGHEST_PERF values from
MSR_HWP_CAPABILITIES to set asymmetric CPU capacity information
via the previously introduced arch_set_cpu_capacity() on hybrid
systems without SMT.
Setting asymmetric CPU capacity is generally necessary to allow the
scheduler to compute task sizes in a consistent way across all CPUs
in a system where they differ by capacity. That, in turn, should help
to improve scheduling decisions. It is also necessary for the schedutil
cpufreq governor to operate as expected on hybrid systems where tasks
migrate between CPUs of different capacities.
The underlying observation is that intel_pstate already uses
MSR_HWP_CAPABILITIES to get CPU performance information which is
exposed by it via sysfs and CPU performance scaling is based on it.
Thus using this information for setting asymmetric CPU capacity is
consistent with what the driver has been doing already. Moreover,
HWP_HIGHEST_PERF reflects the maximum capacity of a given CPU including
both the instructions-per-cycle (IPC) factor and the maximum turbo
frequency and the units in which that value is expressed are the same
for all CPUs in the system, so the maximum capacity ratio between two
CPUs can be obtained by computing the ratio of their HWP_HIGHEST_PERF
values. Of course, in principle that capacity ratio need not be
directly applicable at lower frequencies, so using it for providing the
asymmetric CPU capacity information to the scheduler is a rough
approximation, but it is as good as it gets. Also, measurements
indicate that this approximation is not too bad in practice.
If the given system is hybrid and non-SMT, the new code disables ITMT
support in the scheduler (because it may get in the way of asymmetric CPU
capacity code in the scheduler that automatically gets enabled by setting
asymmetric CPU capacity) after initializing all online CPUs and finds
the one with the maximum HWP_HIGHEST_PERF value. Next, it computes the
capacity number for each (online) CPU by dividing the product of its
HWP_HIGHEST_PERF and SCHED_CAPACITY_SCALE by the maximum HWP_HIGHEST_PERF.
When a CPU goes offline, its capacity is reset to SCHED_CAPACITY_SCALE
and if it is the one with the maximum HWP_HIGHEST_PERF value, the
capacity numbers for all of the other online CPUs are recomputed. This
also takes care of a cleanup during driver operation mode changes.
Analogously, when a new CPU goes online, its capacity number is updated
and if its HWP_HIGHEST_PERF value is greater than the current maximum
one, the capacity numbers for all of the other online CPUs are
recomputed.
The case when the driver is notified of a CPU capacity change, either
through the HWP interrupt or through an ACPI notification, is handled
similarly to the CPU online case above, except that if the target CPU
is the current highest-capacity one and its capacity is reduced, the
capacity numbers for all of the other online CPUs need to be recomputed
either.
If the driver's "no_trubo" sysfs attribute is updated, all of the CPU
capacity information is computed from scratch to reflect the new turbo
status.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Tested-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com> # scale invariance
Link: https://patch.msgid.link/1979653.PYKUYFuaPT@rjwysocki.net
[ rjw: Fixed a typo in the changelog ]
[ rjw: Renamed 3 new functions and added a comment ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
commit bff7d13c19 ("cpufreq: amd-pstate: add debug message while
CPPC is supported and disabled by SBIOS") issues a warning on plaforms
where the X86_FEATURE_CPPC is expected to be enabled, but is not due
to it being disabled in the BIOS.
This feature bit corresponds to CPUID 0x80000008.ebx[27] which is a
reserved bit on the Zen1 processors and a reserved bit on Zen2 based
models 0x70-0x7F, and is expected to be cleared on these
platforms. Thus printing the warning message for these models when
X86_FEATURE_CPPC is unavailable is incorrect. Fix this.
Modify some of the comments, and use switch-case for model range
checking for improved readability while at it.
Fixes: bff7d13c19 ("cpufreq: amd-pstate: add debug message while CPPC is supported and disabled by SBIOS")
Cc: Xiaojian Du <xiaojian.du@amd.com>
Reported-by: David Wang <00107082@163.com>
Closes: https://lore.kernel.org/lkml/20240730140111.4491-1-00107082@163.com/
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Acked-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
If a system is using preferred cores the highest perf will be inconsistent
as it can change from system events.
Skip the checks for it.
Fixes: e571a5e206 ("cpufreq: amd-pstate: Update amd-pstate preferred core ranking dynamically")
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
After the commit 63edbaa48a ("x86/cpu/topology: Add support for the
AMD 0x80000026 leaf"), the topolgy_logical_die_id() function returns
the logical Core Chiplet Die (CCD) ID instead of the logical socket
ID.
Since this is currently used to set MSR_AMD_CPPC_ENABLE, which needs
to be set on any one of the threads of the socket, it is prudent to
use topology_logical_package_id() in place of
topology_logical_die_id().
Fixes: 63edbaa48a ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf")
cc: stable@vger.kernel.org # 6.10
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Tested-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>
Link: https://lore.kernel.org/lkml/20240801124509.3650-1-Dhananjay.Ugwekar@amd.com/
Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Smatch complains that "ret" could be uninitialized:
drivers/cpufreq/amd-pstate.c:734 amd_pstate_cpu_boost_update()
error: uninitialized symbol 'ret'.
This seems like it probably is a real issue. Initialize "ret" to zero to
be safe.
Fixes: c8c68c38b5 ("cpufreq: amd-pstate: initialize core precision boost state")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Acked-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Link: https://lore.kernel.org/lkml/7ff53543-6c04-48a0-8d99-7dc010b93b3a@stanley.mountain/T/
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Prevent intel_pstate from loading when OOB (Out Of Band) P-states mode is
enabled.
The OOB identifying bits are same as for the prior generation CPUs like
Emerald Rapids servers. Add Granite Rapids and Sierra Forest CPU models to
intel_pstate_cpu_oob_ids[].
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20240802184839.1909091-1-srinivas.pandruvada@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
In some build configurations (e.g. x86 allmodconfig), 2 cpu_mask
variables exceeds the max stack frame size:
drivers/cpufreq/armada-8k-cpufreq.c:203:1: error: the frame size of 2128 bytes is larger than 2048 bytes
Fix it by making "cpus" static which is fine given that module init is
only called once.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The omap driver doesn't actually need asm/smp_plat.h, so drop it.
asm/cpu.h is not needed either as linux/cpu.h is already included.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The qcom-cpufreq-hw driver is relying on an implicit include of io.h
which doesn't get included on some architectures.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Use of_property_count_u32_elems() and of_property_for_each_u32() instead
of of_find_property() and open coding the property parsing.
This is part of a larger effort to remove callers of of_find_property()
and similar functions. of_find_property() leaks the DT struct property
and data pointers which is a problem for dynamically allocated nodes
which may be freed.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
[Viresh: Fixed build failure and initialize / increment 'i']
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Use of_property_present() to test for property presence rather than
of_(find|get)_property(). This is part of a larger effort to remove
callers of of_find_property() and similar functions. of_find_property()
leaks the DT struct property and data pointers which is a problem for
dynamically allocated nodes which may be freed.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The current LATENCY_MULTIPLIER which has been around for nearly 20 years
causes rate_limit_us to be always in ms range.
On M1 mac mini I get 50 and 56us transition latency, but due to the 1000
multiplier we end up setting rate_limit_us to 50 and 56ms, which gets
capped into 2ms and was 10ms before e13aa799c2 ("cpufreq: Change
default transition delay to 2ms")
On Intel I5 system transition latency is 20us but due to the multiplier
we end up with 20ms that again is capped to 2ms.
Given how good modern hardware and how modern workloads require systems
to be more responsive to cater for sudden changes in workload (tasks
sleeping/wakeup/migrating, uclamp causing a sudden boost or cap) and
that 2ms is quarter of the time of 120Hz refresh rate system, drop the
old logic in favour of providing 50% headroom.
rate_limit_us = 1.5 * latency.
I considered not adding any headroom which could mean that we can end up
with infinite back-to-back requests.
I also considered providing a constant headroom (e.g: 100us) assuming
that any h/w or f/w dealing with the request shouldn't require a large
headroom when transition_latency is actually high.
But for both cases I wasn't sure if h/w or f/w can end up being
overwhelmed dealing with the freq requests in a potentially busy system.
So I opted for providing 50% breathing room.
This is expected to impact schedutil only as the other user,
dbs_governor, takes the max(2*tick, transition_delay_us) and the former
was at least 2ms on 1ms TICK, which is equivalent to the max_delay_us
before applying this patch. For systems with TICK of 4ms, this value
would have almost always ended up with 8ms sampling rate.
For systems that report 0 transition latency, we still default to
returning 1ms as transition delay.
This helps in eliminating a source of latency for applying requests as
mentioned in [1]. For example if we have a 1ms tick, most systems will
miss sending an update at tick when updating the util_avg for a task/CPU
(rate_limit_us will be 2ms for most systems).
Link: https://lore.kernel.org/lkml/20240724212255.mfr2ybiv2j2uqek7@airbuntu/ # [1]
Link: https://lore.kernel.org/lkml/20240205022500.2232124-1-qyousef@layalina.io/
Signed-off-by: Qais Yousef <qyousef@layalina.io>
Link: https://patch.msgid.link/20240728192659.58115-1-qyousef@layalina.io
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
With ARCH=powerpc, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/cpufreq/ppc-cbe-cpufreq.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/cpufreq/powernv-cpufreq.o
Add the missing invocation of the MODULE_DESCRIPTION() macro to all
files which have a MODULE_LICENSE().
This includes three additional files which, although they did not
produce a warning with the powerpc allmodconfig configuration, may
cause this warning with specific options enabled in the kernel
configuration.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/20240722-md-powerpc-drivers-cpufreq-v2-1-bb84d715eb3d@quicinc.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
On Intel Emerald Rapids machines, we ship the Energy Performance Preference
(EPP) default for balance_performance as 128. However, during an internal
investigation together with Intel, we have determined that 32 is a more
suitable value. This leads to significant improvements in both performance
and energy:
POV-Ray: 32% faster | 12% less energy
OpenSSL: 12% faster | energy within 1%
Build Linux Kernel: 29% faster | 18% less energy
Therefore, we should move the default EPP for balance_performance to 32.
This is in line with what has already been done for Sapphire Rapids.
Signed-off-by: Pedro Henrique Kopper <pedro.kopper@canonical.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/Zqu6zjVMoiXwROBI@capivara
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Add Loongson-3 CPUFreq driver support (Huacai Chen).
- Add support for the Arrow Lake and Lunar Lake platforms and
the out-of-band (OOB) mode on Emerald Rapids to the intel_pstate
cpufreq driver, make it support the highest performance change
interrupt and clean it up (Srinivas Pandruvada).
- Switch cpufreq to new Intel CPU model defines (Tony Luck).
- Simplify the cpufreq driver interface by switching the .exit() driver
callback to the void return data type (Lizhe, Viresh Kumar).
- Make cpufreq_boost_enabled() return bool (Dhruva Gole).
- Add fast CPPC support to the amd-pstate cpufreq driver, address
multiple assorted issues in it and clean it up (Perry Yuan, Mario
Limonciello, Dhananjay Ugwekar, Meng Li, Xiaojian Du).
- Add Allwinner H700 speed bin to the sun50i cpufreq driver (Ryan
Walklin).
- Fix memory leaks and of_node_put() usage in the sun50i and qcom-nvmem
cpufreq drivers (Javier Carrasco).
- Clean up the sti and dt-platdev cpufreq drivers (Jeff Johnson,
Raphael Gallais-Pou).
- Fix deferred probe handling in the TI cpufreq driver and wrong return
values of ti_opp_supply_probe(), and add OPP tables for the AM62Ax and
AM62Px SoCs to it (Bryan Brattlof, Primoz Fiser).
- Avoid overflow of target_freq in .fast_switch() in the SCMI cpufreq
driver (Jagadeesh Kona).
- Use dev_err_probe() in every error path in probe in the Mediatek
cpufreq driver (Nícolas Prado).
- Fix kernel-doc param for longhaul_setstate in the longhaul cpufreq
driver (Yang Li).
- Fix system resume handling in the CPPC cpufreq driver (Riwen Lu).
- Improve the teo cpuidle governor and clean up leftover comments from
the menu cpuidle governor (Christian Loehle).
- Clean up a comment typo in the teo cpuidle governor (Atul Kumar
Pant).
- Add missing MODULE_DESCRIPTION() macro to cpuidle haltpoll (Jeff
Johnson).
- Switch the intel_idle driver to new Intel CPU model defines (Tony
Luck).
- Switch the Intel RAPL driver new Intel CPU model defines (Tony Luck).
- Simplify if condition in the idle_inject driver (Thorsten Blum).
- Fix missing cleanup on error in _opp_attach_genpd() (Viresh Kumar).
- Introduce an OF helper function to inform if required-opps is used
and drop a redundant in-parameter to _set_opp_level() (Ulf Hansson).
- Update pm-graph to v5.12 which includes fixes and major code revamp
for python3.12 (Todd Brandt).
- Address several assorted issues in the cpupower utility (Roman
Storozhenko).
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Merge tag 'pm-6.11-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 cpufreq driver for Loongson-3, add support for new
features in the intel_pstate (Lunar Lake and Arrow Lake platforms, OOB
mode for Emerald Rapids, highest performance change interrupt),
amd-pstate (fast CPPC) and sun50i (Allwinner H700 speed bin) cpufreq
drivers, simplify the cpufreq driver interface, simplify the teo
cpuidle governor, adjust the pm-graph utility for a new version of
Python, address issues and clean up code.
Specifics:
- Add Loongson-3 CPUFreq driver support (Huacai Chen)
- Add support for the Arrow Lake and Lunar Lake platforms and the
out-of-band (OOB) mode on Emerald Rapids to the intel_pstate
cpufreq driver, make it support the highest performance change
interrupt and clean it up (Srinivas Pandruvada)
- Switch cpufreq to new Intel CPU model defines (Tony Luck)
- Simplify the cpufreq driver interface by switching the .exit()
driver callback to the void return data type (Lizhe, Viresh Kumar)
- Make cpufreq_boost_enabled() return bool (Dhruva Gole)
- Add fast CPPC support to the amd-pstate cpufreq driver, address
multiple assorted issues in it and clean it up (Perry Yuan, Mario
Limonciello, Dhananjay Ugwekar, Meng Li, Xiaojian Du)
- Add Allwinner H700 speed bin to the sun50i cpufreq driver (Ryan
Walklin)
- Fix memory leaks and of_node_put() usage in the sun50i and
qcom-nvmem cpufreq drivers (Javier Carrasco)
- Clean up the sti and dt-platdev cpufreq drivers (Jeff Johnson,
Raphael Gallais-Pou)
- Fix deferred probe handling in the TI cpufreq driver and wrong
return values of ti_opp_supply_probe(), and add OPP tables for the
AM62Ax and AM62Px SoCs to it (Bryan Brattlof, Primoz Fiser)
- Avoid overflow of target_freq in .fast_switch() in the SCMI cpufreq
driver (Jagadeesh Kona)
- Use dev_err_probe() in every error path in probe in the Mediatek
cpufreq driver (Nícolas Prado)
- Fix kernel-doc param for longhaul_setstate in the longhaul cpufreq
driver (Yang Li)
- Fix system resume handling in the CPPC cpufreq driver (Riwen Lu)
- Improve the teo cpuidle governor and clean up leftover comments
from the menu cpuidle governor (Christian Loehle)
- Clean up a comment typo in the teo cpuidle governor (Atul Kumar
Pant)
- Add missing MODULE_DESCRIPTION() macro to cpuidle haltpoll (Jeff
Johnson)
- Switch the intel_idle driver to new Intel CPU model defines (Tony
Luck)
- Switch the Intel RAPL driver new Intel CPU model defines (Tony
Luck)
- Simplify if condition in the idle_inject driver (Thorsten Blum)
- Fix missing cleanup on error in _opp_attach_genpd() (Viresh Kumar)
- Introduce an OF helper function to inform if required-opps is used
and drop a redundant in-parameter to _set_opp_level() (Ulf Hansson)
- Update pm-graph to v5.12 which includes fixes and major code revamp
for python3.12 (Todd Brandt)
- Address several assorted issues in the cpupower utility (Roman
Storozhenko)"
* tag 'pm-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (77 commits)
cpufreq: sti: fix build warning
cpufreq: mediatek: Use dev_err_probe in every error path in probe
cpufreq: Add Loongson-3 CPUFreq driver support
cpufreq: Make cpufreq_driver->exit() return void
cpufreq/amd-pstate: Fix the scaling_max_freq setting on shared memory CPPC systems
cpufreq/amd-pstate-ut: Convert nominal_freq to khz during comparisons
cpufreq: pcc: Remove empty exit() callback
cpufreq: loongson2: Remove empty exit() callback
cpufreq: nforce2: Remove empty exit() callback
cpupower: fix lib default installation path
cpufreq: docs: Add missing scaling_available_frequencies description
cpuidle: teo: Don't count non-existent intercepts
cpupower: Disable direct build of the 'bench' subproject
cpuidle: teo: Remove recent intercepts metric
Revert: "cpuidle: teo: Introduce util-awareness"
cpufreq: make cpufreq_boost_enabled() return bool
cpufreq: intel_pstate: Support highest performance change interrupt
x86/cpufeatures: Add HWP highest perf change feature flag
Documentation: cpufreq: amd-pstate: update doc for Per CPU boost control method
cpufreq: amd-pstate: Cap the CPPC.max_perf to nominal_perf if CPB is off
...
The updates to the mediatek, allwinner, ti, tegra, microchip, stm32,
samsung, imx, zynq and amlogic platoforms are farily small maintenance
changes, either addressing minor mistakes or enabling additional hardware.
The qualcomm platform changes add a number of features and are larger
than the other ones combined, introducing the use of linux/cleanup.h
across several drivers, adding support for Snapdragon X1E and other
SoCs in platform drivers, a new "protection domain mapper" driver, and a
"shared memory bridge" driver.
The cznic "turris omnia" router based on Marvell Armada gets a platform
driver that talks to the board specific microcontroller.
The reset and cache subsystems get a few minor updates to SoC specific
drivers, while the ff-a, scmi and optee firmware drivers get some
code refactoring and new features.
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Merge tag 'soc-drivers-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC driver updates from Arnd Bergmann:
"The updates to the mediatek, allwinner, ti, tegra, microchip, stm32,
samsung, imx, zynq and amlogic platoforms are fairly small maintenance
changes, either addressing minor mistakes or enabling additional
hardware.
The qualcomm platform changes add a number of features and are larger
than the other ones combined, introducing the use of linux/cleanup.h
across several drivers, adding support for Snapdragon X1E and other
SoCs in platform drivers, a new "protection domain mapper" driver, and
a "shared memory bridge" driver.
The cznic "turris omnia" router based on Marvell Armada gets a
platform driver that talks to the board specific microcontroller.
The reset and cache subsystems get a few minor updates to SoC specific
drivers, while the ff-a, scmi and optee firmware drivers get some code
refactoring and new features"
* tag 'soc-drivers-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (122 commits)
firmware: turris-mox-rwtm: Initialize completion before mailbox
firmware: turris-mox-rwtm: Fix checking return value of wait_for_completion_timeout()
firmware: turris-mox-rwtm: Do not complete if there are no waiters
MAINTAINERS: drop riscv list from cache controllers
platform: cznic: turris-omnia-mcu: fix Kconfig dependencies
bus: sunxi-rsb: Constify struct regmap_bus
soc: sunxi: sram: Constify struct regmap_config
platform: cznic: turris-omnia-mcu: Depend on WATCHDOG
platform: cznic: turris-omnia-mcu: Depend on OF
soc: samsung: exynos-pmu: add support for PMU_ALIVE non atomic registers
arm64: stm32: enable scmi regulator for stm32
firmware: qcom: tzmem: blacklist more platforms for SHM Bridge
soc: qcom: wcnss: simplify with cleanup.h
soc: qcom: pdr: simplify with cleanup.h
soc: qcom: ocmem: simplify with cleanup.h
soc: qcom: mdt_loader: simplify with cleanup.h
soc: qcom: llcc: simplify with cleanup.h
firmware: qcom: tzmem: simplify returning pointer without cleanup
soc: qcom: socinfo: Add PM6350 PMIC
arm64: dts: renesas: rz-smarc: Replace fixed regulator for USB VBUS
...
Support for Shared Memory (shm) Bridge is added, which provides a
stricter interface for handling of buffers passed to TrustZone.
The X1Elite platform is added to uefisecapp allow list, to instantiate
the efivars implementation.
A new in-kernel implementation of the pd-mapper (or servreg) service is
introduced, to replace the userspace dependency for USB Type-C and
battery management.
Support for sharing interrupts across multiple bwmon instances is added,
and a refcount imbalance issue is corrected.
The LLCC support for recent platforms is corrected, and SA8775P support
is added.
A new interface is added to SMEM, to expose "feature codes". One example
of the usecase for this is to indicate to the GPU driver which
frequencies are available on the given device.
The interrupt consumer and provider side of SMP2P is updated to provide
more useful names in interrupt stats.
Support for using the mailbox binding and driver for outgoing IPC
interrupt in the SMSM driver is introduced.
socinfo driver learns about SDM670 and IPQ5321, as well as get some
updates to the X1E PMICs.
pmic_glink is bumped to now support managing 3 USB Type-C ports.
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Merge tag 'qcom-drivers-for-6.11' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/drivers
Qualcomm driver updates for v6.11
Support for Shared Memory (shm) Bridge is added, which provides a
stricter interface for handling of buffers passed to TrustZone.
The X1Elite platform is added to uefisecapp allow list, to instantiate
the efivars implementation.
A new in-kernel implementation of the pd-mapper (or servreg) service is
introduced, to replace the userspace dependency for USB Type-C and
battery management.
Support for sharing interrupts across multiple bwmon instances is added,
and a refcount imbalance issue is corrected.
The LLCC support for recent platforms is corrected, and SA8775P support
is added.
A new interface is added to SMEM, to expose "feature codes". One example
of the usecase for this is to indicate to the GPU driver which
frequencies are available on the given device.
The interrupt consumer and provider side of SMP2P is updated to provide
more useful names in interrupt stats.
Support for using the mailbox binding and driver for outgoing IPC
interrupt in the SMSM driver is introduced.
socinfo driver learns about SDM670 and IPQ5321, as well as get some
updates to the X1E PMICs.
pmic_glink is bumped to now support managing 3 USB Type-C ports.
* tag 'qcom-drivers-for-6.11' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux: (48 commits)
soc: qcom: smp2p: Use devname for interrupt descriptions
soc: qcom: smsm: Add missing mailbox dependency to Kconfig
soc: qcom: add missing pd-mapper dependencies
soc: qcom: icc-bwmon: Allow for interrupts to be shared across instances
dt-bindings: interconnect: qcom,msm8998-bwmon: Add X1E80100 BWMON instances
dt-bindings: interconnect: qcom,msm8998-bwmon: Remove opp-table from the required list
firmware: qcom: tzmem: export devm_qcom_tzmem_pool_new()
soc: qcom: add pd-mapper implementation
soc: qcom: pdr: extract PDR message marshalling data
soc: qcom: pdr: fix parsing of domains lists
soc: qcom: pdr: protect locator_addr with the main mutex
firmware: qcom: scm: clarify the comment in qcom_scm_pas_init_image()
firmware: qcom: scm: add support for SHM bridge memory carveout
firmware: qcom: tzmem: enable SHM Bridge support
firmware: qcom: scm: add support for SHM bridge operations
firmware: qcom: qseecom: convert to using the TZ allocator
firmware: qcom: scm: make qcom_scm_qseecom_app_get_id() use the TZ allocator
firmware: qcom: scm: make qcom_scm_lmh_dcvsh() use the TZ allocator
firmware: qcom: scm: make qcom_scm_ice_set_key() use the TZ allocator
firmware: qcom: scm: make qcom_scm_assign_mem() use the TZ allocator
...
Link: https://lore.kernel.org/r/20240705034410.13968-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Building this driver yields the following:
.../drivers/cpufreq/sti-cpufreq.c:215:50: warning: ‘%d’ directive output may be truncated writing between 1 and 10 bytes into a region of size 2 [-Wformat-truncation=]
215 | snprintf(name, MAX_PCODE_NAME_LEN, pcode%d, pcode);
| ^~
.../drivers/cpufreq/sti-cpufreq.c:215:44: note: directive argument in the range [0, 2147483647]
215 | snprintf(name, MAX_PCODE_NAME_LEN, pcode%d, pcode);
| ^~~~~~~~~
.../drivers/cpufreq/sti-cpufreq.c:215:9: note: ‘snprintf’ output between 7 and 16 bytes into a destination of size 7
215 | snprintf(name, MAX_PCODE_NAME_LEN, pcode%d, pcode);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fix the buffer size to avoid the warning at build time.
Signed-off-by: Raphael Gallais-Pou <rgallaispou@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Use the dev_err_probe() helper to log the errors on every error path in
the probe function and its sub-functions. This includes
* adding error messages where there was none
* converting over dev_err/dev_warn
* removing the top-level error message after mtk_cpu_dvfs_info_init() is
called, since every error path inside that function already logs the
error reason. This gets rid of the misleading error message when probe
is deferred:
mtk-cpufreq mtk-cpufreq: failed to initialize dvfs info for cpu0
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Some of LoongArch processors (Loongson-3 series) support DVFS, their
IOCSR.FEATURES has IOCSRF_FREQSCALE set. And they has a micro-core in
the package called SMC (System Management Controller), which can be
used to detect temperature, control fans, scale frequency and voltage,
etc.
The Loongson-3 CPUFreq driver is very simple now, it communicate with
SMC, get DVFS info, set target frequency from CPUFreq core, and so on.
There is a command list to interact with SMC, widely-used commands in
the CPUFreq driver include:
CMD_GET_VERSION: Get SMC firmware version.
CMD_GET_FEATURE: Get enabled SMC features.
CMD_SET_FEATURE: Enable SMC features, such as basic DVFS, BOOST.
CMD_GET_FREQ_LEVEL_NUM: Get the number of all frequency levels.
CMD_GET_FREQ_BOOST_LEVEL: Get the first boost frequency level.
CMD_GET_FREQ_LEVEL_INFO: Get the detail info of a frequency level.
CMD_GET_FREQ_INFO: Get the current frequency.
CMD_SET_FREQ_INFO: Set the target frequency.
In future we will add automatic frequency scaling, which is similar to
Intel's HWP (HardWare P-State).
Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
[ Viresh: Minor formatting cleanups, change return type of exit() to
void and use devm_mutex_init() ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The cpufreq core doesn't check the return type of the exit() callback
and there is not much the core can do on failures at that point. Just
drop the returned value and make it return void.
Signed-off-by: Lizhe <sensor1010@163.com>
[ Viresh: Reworked the patches to fix all missing changes together. ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> # Mediatek
Acked-by: Sudeep Holla <sudeep.holla@arm.com> # scpi, scmi, vexpress
Acked-by: Mario Limonciello <mario.limonciello@amd.com> # amd
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> # bmips
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Kevin Hilman <khilman@baylibre.com> # omap
This adds fixes for setting scaling max frequency on systems
without a dedicated MSR for setting CPPC requests.
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Merge tag 'amd-pstate-v6.11-2024-07-07' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux
Merge more amd-pstate changes for 6.11 from Mario Liminciello:
"This adds fixes for setting scaling max frequency on systems
without a dedicated MSR for setting CPPC requests."
* tag 'amd-pstate-v6.11-2024-07-07' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
cpufreq/amd-pstate: Fix the scaling_max_freq setting on shared memory CPPC systems
cpufreq/amd-pstate-ut: Convert nominal_freq to khz during comparisons
