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Author SHA1 Message Date
Viresh Kumar
33db8c97b4 rust: Use CpuId in place of raw CPU numbers 
Use the newly defined `CpuId` abstraction instead of raw CPU numbers.

This also fixes a doctest failure for configurations where `nr_cpu_ids <
4`.

The C `cpumask_{set|clear}_cpu()` APIs emit a warning when given an
invalid CPU number — but only if `CONFIG_DEBUG_PER_CPU_MAPS=y` is set.

Meanwhile, `cpumask_weight()` only considers CPUs up to `nr_cpu_ids`,
which can cause inconsistencies: a CPU number greater than `nr_cpu_ids`
may be set in the mask, yet the weight calculation won't reflect it.

This leads to doctest failures when `nr_cpu_ids < 4`, as the test tries
to set CPUs 2 and 3:

  rust_doctest_kernel_cpumask_rs_0.location: rust/kernel/cpumask.rs:180
  rust_doctest_kernel_cpumask_rs_0: ASSERTION FAILED at rust/kernel/cpumask.rs:190

Fixes: 8961b8cb3099 ("rust: cpumask: Add initial abstractions")
Reported-by: Miguel Ojeda <ojeda@kernel.org>
Closes: https://lore.kernel.org/rust-for-linux/CANiq72k3ozKkLMinTLQwvkyg9K=BeRxs1oYZSKhJHY-veEyZdg@mail.gmail.com/
Reported-by: Andreas Hindborg <a.hindborg@kernel.org>
Closes: https://lore.kernel.org/all/87qzzy3ric.fsf@kernel.org/
Suggested-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
 2025-06-12 10:31:28 +05:30
Ingo Molnar
41cb08555c treewide, timers: Rename from_timer() to timer_container_of() 
Move this API to the canonical timer_*() namespace.

[ tglx: Redone against pre rc1 ]

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com
 2025-06-08 09:07:37 +02:00
Linus Torvalds
7d4e49a77d - The 3 patch series "hung_task: extend blocking task stacktrace dump to 
semaphore" from Lance Yang enhances the hung task detector.  The
   detector presently dumps the blocking tasks's stack when it is blocked
   on a mutex.  Lance's series extends this to semaphores.
 
 - The 2 patch series "nilfs2: improve sanity checks in dirty state
   propagation" from Wentao Liang addresses a couple of minor flaws in
   nilfs2.
 
 - The 2 patch series "scripts/gdb: Fixes related to lx_per_cpu()" from
   Illia Ostapyshyn fixes a couple of issues in the gdb scripts.
 
 - The 9 patch series "Support kdump with LUKS encryption by reusing LUKS
   volume keys" from Coiby Xu addresses a usability problem with kdump.
   When the dump device is LUKS-encrypted, the kdump kernel may not have
   the keys to the encrypted filesystem.  A full writeup of this is in the
   series [0/N] cover letter.
 
 - The 2 patch series "sysfs: add counters for lockups and stalls" from
   Max Kellermann adds /sys/kernel/hardlockup_count and
   /sys/kernel/hardlockup_count and /sys/kernel/rcu_stall_count.
 
 - The 3 patch series "fork: Page operation cleanups in the fork code"
   from Pasha Tatashin implements a number of code cleanups in fork.c.
 
 - The 3 patch series "scripts/gdb/symbols: determine KASLR offset on
   s390 during early boot" from Ilya Leoshkevich fixes some s390 issues in
   the gdb scripts.
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Merge tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - "hung_task: extend blocking task stacktrace dump to semaphore" from
   Lance Yang enhances the hung task detector.

   The detector presently dumps the blocking tasks's stack when it is
   blocked on a mutex. Lance's series extends this to semaphores

 - "nilfs2: improve sanity checks in dirty state propagation" from
   Wentao Liang addresses a couple of minor flaws in nilfs2

 - "scripts/gdb: Fixes related to lx_per_cpu()" from Illia Ostapyshyn
   fixes a couple of issues in the gdb scripts

 - "Support kdump with LUKS encryption by reusing LUKS volume keys" from
   Coiby Xu addresses a usability problem with kdump.

   When the dump device is LUKS-encrypted, the kdump kernel may not have
   the keys to the encrypted filesystem. A full writeup of this is in
   the series [0/N] cover letter

 - "sysfs: add counters for lockups and stalls" from Max Kellermann adds
   /sys/kernel/hardlockup_count and /sys/kernel/hardlockup_count and
   /sys/kernel/rcu_stall_count

 - "fork: Page operation cleanups in the fork code" from Pasha Tatashin
   implements a number of code cleanups in fork.c

 - "scripts/gdb/symbols: determine KASLR offset on s390 during early
   boot" from Ilya Leoshkevich fixes some s390 issues in the gdb
   scripts

* tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (67 commits)
  llist: make llist_add_batch() a static inline
  delayacct: remove redundant code and adjust indentation
  squashfs: add optional full compressed block caching
  crash_dump, nvme: select CONFIGFS_FS as built-in
  scripts/gdb/symbols: determine KASLR offset on s390 during early boot
  scripts/gdb/symbols: factor out pagination_off()
  scripts/gdb/symbols: factor out get_vmlinux()
  kernel/panic.c: format kernel-doc comments
  mailmap: update and consolidate Casey Connolly's name and email
  nilfs2: remove wbc->for_reclaim handling
  fork: define a local GFP_VMAP_STACK
  fork: check charging success before zeroing stack
  fork: clean-up naming of vm_stack/vm_struct variables in vmap stacks code
  fork: clean-up ifdef logic around stack allocation
  kernel/rcu/tree_stall: add /sys/kernel/rcu_stall_count
  kernel/watchdog: add /sys/kernel/{hard,soft}lockup_count
  x86/crash: make the page that stores the dm crypt keys inaccessible
  x86/crash: pass dm crypt keys to kdump kernel
  Revert "x86/mm: Remove unused __set_memory_prot()"
  crash_dump: retrieve dm crypt keys in kdump kernel
  ...
 2025-05-31 19:12:53 -07:00
Rafael J. Wysocki
25961ae6c8 Merge branch 'pm-cpufreq' 
Merge Rust support for cpufreq and OPP, a new Rust-based cpufreq-dt
driver, an SCMI cpufreq driver cleanup, and an ACPI cpufreq driver
regression fix:

 - Add Rust abstractions for CPUFreq framework (Viresh Kumar).

 - Add Rust abstractions for OPP framework (Viresh Kumar).

 - Add basic Rust abstractions for Clk and Cpumask frameworks (Viresh
   Kumar).

 - Clean up the SCMI cpufreq driver somewhat (Mike Tipton).

 - Use KHz as the nominal_freq units in get_max_boost_ratio() in the
   ACPI cpufreq driver (iGautham Shenoy).

* pm-cpufreq:
  acpi-cpufreq: Fix nominal_freq units to KHz in get_max_boost_ratio()
  rust: opp: Move `cfg(CONFIG_OF)` attribute to the top of doc test
  rust: opp: Make the doctest example depend on CONFIG_OF
  cpufreq: scmi: Skip SCMI devices that aren't used by the CPUs
  cpufreq: Add Rust-based cpufreq-dt driver
  rust: opp: Extend OPP abstractions with cpufreq support
  rust: cpufreq: Extend abstractions for driver registration
  rust: cpufreq: Extend abstractions for policy and driver ops
  rust: cpufreq: Add initial abstractions for cpufreq framework
  rust: opp: Add abstractions for the configuration options
  rust: opp: Add abstractions for the OPP table
  rust: opp: Add initial abstractions for OPP framework
  rust: cpu: Add from_cpu()
  rust: macros: enable use of hyphens in module names
  rust: clk: Add initial abstractions
  rust: clk: Add helpers for Rust code
  MAINTAINERS: Add entry for Rust cpumask API
  rust: cpumask: Add initial abstractions
  rust: cpumask: Add few more helpers
 2025-05-30 20:11:09 +02:00
Gautham R. Shenoy
cb6a85f38f acpi-cpufreq: Fix nominal_freq units to KHz in get_max_boost_ratio() 
commit 083466754596 ("cpufreq: ACPI: Fix max-frequency computation")
modified get_max_boost_ratio() to return the nominal_freq advertised
in the _CPC object. This was for the purposes of computing the maximum
frequency. The frequencies advertised in _CPC objects are in
MHz. However, cpufreq expects the frequency to be in KHz. Since the
nominal_freq returned by get_max_boost_ratio() was not in KHz but
instead in MHz,the cpuinfo_max_frequency that was computed using this
nominal_freq was incorrect and an invalid value which resulted in
cpufreq reporting the P0 frequency as the cpuinfo_max_freq.

Fix this by converting the nominal_freq to KHz before returning the
same from get_max_boost_ratio().

Reported-by: Manu Bretelle <chantr4@gmail.com>
Closes: https://lore.kernel.org/lkml/aDaB63tDvbdcV0cg@HQ-GR2X1W2P57/
Fixes: 083466754596 ("cpufreq: ACPI: Fix max-frequency computation")
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Cc: 6.14+ <stable@vger.kernel.org> # 6.14+
Link: https://patch.msgid.link/20250529085143.709-1-gautham.shenoy@amd.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-05-29 15:20:45 +02:00
Linus Torvalds
c89756bcf4 Power management updates for 6.16-rc1 
- Fix potential division-by-zero error in em_compute_costs() (Yaxiong
    Tian).
 
  - Fix typos in energy model documentation and example driver code (Moon
    Hee Lee, Atul Kumar Pant).
 
  - Rearrange the energy model management code and add a new function for
    adjusting a CPU energy model after adjusting the capacity of the
    given CPU to it (Rafael Wysocki).
 
  - Refactor cpufreq_online(), add and use cpufreq policy locking guards,
    use __free() in policy reference counting, and clean up core cpufreq
    code on top of that (Rafael Wysocki).
 
  - Fix boost handling on CPU suspend/resume and sysfs updates (Viresh
    Kumar).
 
  - Fix des_perf clamping with max_perf in amd_pstate_update() (Dhananjay
    Ugwekar).
 
  - Add offline, online and suspend callbacks to the amd-pstate driver,
    rename and use the existing amd_pstate_epp callbacks in it (Dhananjay
    Ugwekar).
 
  - Add support for the "Requested CPU Min frequency" BIOS option to the
    amd-pstate driver (Dhananjay Ugwekar).
 
  - Reset amd-pstate driver mode after running selftests (Swapnil
    Sapkal).
 
  - Avoid shadowing ret in amd_pstate_ut_check_driver() (Nathan
    Chancellor).
 
  - Add helper for governor checks to the schedutil cpufreq governor and
    move cpufreq-specific EAS checks to cpufreq (Rafael Wysocki).
 
  - Populate the cpu_capacity sysfs entries from the intel_pstate driver
    after registering asym capacity support (Ricardo Neri).
 
  - Add support for enabling Energy-aware scheduling (EAS) to the
    intel_pstate driver when operating in the passive mode on a hybrid
    platform (Rafael Wysocki).
 
  - Drop redundant cpus_read_lock() from store_local_boost() in the
    cpufreq core (Seyediman Seyedarab).
 
  - Replace sscanf() with kstrtouint() in the cpufreq code and use a
    symbol instead of a raw number in it (Bowen Yu).
 
  - Add support for autonomous CPU performance state selection to the
    CPPC cpufreq driver (Lifeng Zheng).
 
  - OPP: Add dev_pm_opp_set_level() (Praveen Talari).
 
  - Introduce scope-based cleanup headers and mutex locking guards in OPP
    core (Viresh Kumar).
 
  - Switch OPP to use kmemdup_array() (Zhang Enpei).
 
  - Optimize bucket assignment when next_timer_ns equals KTIME_MAX in the
    menu cpuidle governor (Zhongqiu Han).
 
  - Convert the cpuidle PSCI driver to a faux device one (Sudeep Holla).
 
  - Add C1 demotion on/off sysfs knob to the intel_idle driver (Artem
    Bityutskiy).
 
  - Fix typos in two comments in the teo cpuidle governor (Atul Kumar
    Pant).
 
  - Fix denying of auto suspend in pm_suspend_timer_fn() (Charan Teja
    Kalla).
 
  - Move debug runtime PM attributes to runtime_attrs[] (Rafael Wysocki).
 
  - Add new devm_ functions for enabling runtime PM and runtime PM
    reference counting (Bence Csókás).
 
  - Remove size arguments from strscpy() calls in the hibernation core
    code (Thorsten Blum).
 
  - Adjust the handling of devices with asynchronous suspend enabled
    during system suspend and resume to start resuming them immediately
    after resuming their parents and to start suspending such a device
    immediately after suspending its first child (Rafael Wysocki).
 
  - Adjust messages printed during tasks freezing to avoid using
    pr_cont() (Andrew Sayers, Paul Menzel).
 
  - Clean up unnecessary usage of !! in pm_print_times_init() (Zihuan
    Zhang).
 
  - Add missing wakeup source attribute relax_count to sysfs and
    remove the space character at the end ofi the string produced by
    pm_show_wakelocks() (Zijun Hu).
 
  - Add configurable pm_test delay for hibernation (Zihuan Zhang).
 
  - Disable asynchronous suspend in ucsi_ccg_probe() to prevent the
    cypd4226 device on Tegra boards from suspending prematurely (Jon
    Hunter).
 
  - Unbreak printing PM debug messages during hibernation and clean up
    some related code (Rafael Wysocki).
 
  - Add a systemd service to run cpupower and change cpupower binding's
    Makefile to use -lcpupower (John B. Wyatt IV, Francesco Poli).
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Merge tag 'pm-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "Once again, the changes are dominated by cpufreq updates, but this
  time the majority of them are cpufreq core changes, mostly related to
  the introduction of policy locking guards and __free() usage, and
  fixes related to boost handling.

  Still, there is also a significant update of the intel_pstate driver
  making it register an energy model when running on a hybrid platform
  which is used for enabling energy-aware scheduling (EAS) if the driver
  operates in the passive mode (and schedutil is used as the cpufreq
  governor for all CPUs which is the passive mode default).

  There are some amd-pstate driver updates too, for a good measure,
  including the "Requested CPU Min frequency" BIOS option support and
  new online/offline callbacks.

  In the cpuidle space, the most significant change is the addition of a
  C1 demotion on/off sysfs knob to intel_idle which should help some
  users to configure their systems more precisely. There is also the
  conversion of the PSCI cpuidle driver to a faux device one and there
  are two small updates of cpuidle governors.

  Device power management is also modified quite a bit, especially the
  handling of devices with asynchronous suspend and resume enabled
  during system transitions. They are now going to be handled more
  asynchronously during suspend transitions and somewhat less
  aggressively during resume transitions.

  Apart from the above, the operating performance points (OPP) library
  is now going to use mutex locking guards and scope-based cleanup
  helpers and there is the usual bunch of assorted fixes and code
  cleanups.

  Specifics:

   - Fix potential division-by-zero error in em_compute_costs() (Yaxiong
     Tian)

   - Fix typos in energy model documentation and example driver code
     (Moon Hee Lee, Atul Kumar Pant)

   - Rearrange the energy model management code and add a new function
     for adjusting a CPU energy model after adjusting the capacity of
     the given CPU to it (Rafael Wysocki)

   - Refactor cpufreq_online(), add and use cpufreq policy locking
     guards, use __free() in policy reference counting, and clean up
     core cpufreq code on top of that (Rafael Wysocki)

   - Fix boost handling on CPU suspend/resume and sysfs updates (Viresh
     Kumar)

   - Fix des_perf clamping with max_perf in amd_pstate_update()
     (Dhananjay Ugwekar)

   - Add offline, online and suspend callbacks to the amd-pstate driver,
     rename and use the existing amd_pstate_epp callbacks in it
     (Dhananjay Ugwekar)

   - Add support for the "Requested CPU Min frequency" BIOS option to
     the amd-pstate driver (Dhananjay Ugwekar)

   - Reset amd-pstate driver mode after running selftests (Swapnil
     Sapkal)

   - Avoid shadowing ret in amd_pstate_ut_check_driver() (Nathan
     Chancellor)

   - Add helper for governor checks to the schedutil cpufreq governor
     and move cpufreq-specific EAS checks to cpufreq (Rafael Wysocki)

   - Populate the cpu_capacity sysfs entries from the intel_pstate
     driver after registering asym capacity support (Ricardo Neri)

   - Add support for enabling Energy-aware scheduling (EAS) to the
     intel_pstate driver when operating in the passive mode on a hybrid
     platform (Rafael Wysocki)

   - Drop redundant cpus_read_lock() from store_local_boost() in the
     cpufreq core (Seyediman Seyedarab)

   - Replace sscanf() with kstrtouint() in the cpufreq code and use a
     symbol instead of a raw number in it (Bowen Yu)

   - Add support for autonomous CPU performance state selection to the
     CPPC cpufreq driver (Lifeng Zheng)

   - OPP: Add dev_pm_opp_set_level() (Praveen Talari)

   - Introduce scope-based cleanup headers and mutex locking guards in
     OPP core (Viresh Kumar)

   - Switch OPP to use kmemdup_array() (Zhang Enpei)

   - Optimize bucket assignment when next_timer_ns equals KTIME_MAX in
     the menu cpuidle governor (Zhongqiu Han)

   - Convert the cpuidle PSCI driver to a faux device one (Sudeep Holla)

   - Add C1 demotion on/off sysfs knob to the intel_idle driver (Artem
     Bityutskiy)

   - Fix typos in two comments in the teo cpuidle governor (Atul Kumar
     Pant)

   - Fix denying of auto suspend in pm_suspend_timer_fn() (Charan Teja
     Kalla)

   - Move debug runtime PM attributes to runtime_attrs[] (Rafael
     Wysocki)

   - Add new devm_ functions for enabling runtime PM and runtime PM
     reference counting (Bence Csókás)

   - Remove size arguments from strscpy() calls in the hibernation core
     code (Thorsten Blum)

   - Adjust the handling of devices with asynchronous suspend enabled
     during system suspend and resume to start resuming them immediately
     after resuming their parents and to start suspending such a device
     immediately after suspending its first child (Rafael Wysocki)

   - Adjust messages printed during tasks freezing to avoid using
     pr_cont() (Andrew Sayers, Paul Menzel)

   - Clean up unnecessary usage of !! in pm_print_times_init() (Zihuan
     Zhang)

   - Add missing wakeup source attribute relax_count to sysfs and remove
     the space character at the end ofi the string produced by
     pm_show_wakelocks() (Zijun Hu)

   - Add configurable pm_test delay for hibernation (Zihuan Zhang)

   - Disable asynchronous suspend in ucsi_ccg_probe() to prevent the
     cypd4226 device on Tegra boards from suspending prematurely (Jon
     Hunter)

   - Unbreak printing PM debug messages during hibernation and clean up
     some related code (Rafael Wysocki)

   - Add a systemd service to run cpupower and change cpupower binding's
     Makefile to use -lcpupower (John B. Wyatt IV, Francesco Poli)"

* tag 'pm-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (72 commits)
  cpufreq: CPPC: Add support for autonomous selection
  cpufreq: Update sscanf() to kstrtouint()
  cpufreq: Replace magic number
  OPP: switch to use kmemdup_array()
  PM: freezer: Rewrite restarting tasks log to remove stray *done.*
  PM: runtime: fix denying of auto suspend in pm_suspend_timer_fn()
  cpufreq: drop redundant cpus_read_lock() from store_local_boost()
  cpupower: do not install files to /etc/default/
  cpupower: do not call systemctl at install time
  cpupower: do not write DESTDIR to cpupower.service
  PM: sleep: Introduce pm_sleep_transition_in_progress()
  cpufreq/amd-pstate: Avoid shadowing ret in amd_pstate_ut_check_driver()
  cpufreq: intel_pstate: Document hybrid processor support
  cpufreq: intel_pstate: EAS: Increase cost for CPUs using L3 cache
  cpufreq: intel_pstate: EAS support for hybrid platforms
  PM: EM: Introduce em_adjust_cpu_capacity()
  PM: EM: Move CPU capacity check to em_adjust_new_capacity()
  PM: EM: Documentation: Fix typos in example driver code
  cpufreq: Drop policy locking from cpufreq_policy_is_good_for_eas()
  PM: sleep: Introduce pm_suspend_in_progress()
  ...
 2025-05-27 16:48:47 -07:00
Linus Torvalds
3702a515ed ACPI updates for 6.16-rc1 
- Fix two ACPICA SLAB cache leaks (Seunghun Han).
 
  - Add EINJv2 get error type action and define Error Injection Actions
    in hex values to avoid inconsistencies between the specification and
    the code (Zaid Alali).
 
  - Fix typo in comments for SRAT structures (Adam Lackorzynski).
 
  - Prevent possible loss of data in ACPICA because of u32 to u8
    conversions (Saket Dumbre).
 
  - Fix reading FFixedHW operation regions in ACPICA (Daniil Tatianin).
 
  - Add support for printing AML arguments when the ACPICA debug level is
    ACPI_LV_TRACE_POINT (Mario Limonciello).
 
  - Drop a stale comment about the file content from actbl2.h (Sudeep
    Holla).
 
  - Apply pack(1) to union aml_resource (Tamir Duberstein).
 
  - Fix overflow check in the ACPICA version of vsnprintf() (gldrk).
 
  - Interpret SIDP structures in DMAR added revision 3.4 of the VT-d
    specification (Alexey Neyman).
 
  - Add typedef and other definitions related to MRRM to ACPICA (Tony
    Luck).
 
  - Add definitions for RIMT to ACPICA (Sunil V L).
 
  - Fix spelling mistake "Incremement" -> "Increment" in the ACPICA
    utilities code (Colin Ian King).
 
  - Add typedef and other definitions for ERDT to ACPICA (Tony Luck).
 
  - Introduce ACPI_NONSTRING and use it (Kees Cook, Ahmed Salem).
 
  - Rename structure and field names of the RAS2 table in actbl2.h (Shiju
    Jose).
 
  - Fix up whitespace in acpica/utcache.c (Zhe Qiao).
 
  - Avoid sequence overread in a call to strncmp() in ap_get_table_length()
    and replace strncpy() with memcpy() in ACPICA in some places (Ahmed
    Salem).
 
  - Update copyright year in all ACPICA files (Saket Dumbre).
 
  - Add __nonstring annotations for unterminated strings in the static
    ACPI tables parsing code (Kees Cook).
 
  - Add support for parsing the MRRM ACPI table and sysfs files to
    describe memory regions listed in it (Tony Luck, Anil Keshavamurthy).
 
  - Remove an (explicitly) unused header file include from the VIOT ACPI
    table parser file (Andy Shevchenko).
 
  - Improve logging around acpi_initialize_tables() (Bartosz Szczepanek).
 
  - Clean up the initialization of CPU data structures in the ACPI
    processor driver (Zhang Rui).
 
  - Remove an obsolete comment regarding the C-states handling in the
    ACPI processor driver (Giovanni Gherdovich).
 
  - Simplify PCC shared memory region handling (Sudeep Holla).
 
  - Rework and extend functions for reading CPPC register values and for
    updating CPPC registers (Lifeng Zheng).
 
  - Add three functions related to autonomous CPU performance state
    selection to the CPPC library (Lifeng Zheng).
 
  - Turn the acpi_pci_root_remap_iospace() fwnode_handle parameter into a
    const pointer (Pei Xiao).
 
  - Round battery capacity percengate in the ACPI battery driver to the
    closest integer to avoid user confusion (shitao).
 
  - Make the ACPI battery driver report the current as a negative number
    to the power supply framework when the battery is discharging as
    documented (Peter Marheine).
 
  - Add TUXEDO InfinityBook Pro AMD Gen9 to the acpi_ec_no_wakeup[] list
    to prevent spurious wakeups from suspend-to-idle (Werner Sembach).
 
  - Convert the APEI EINJ driver to a faux device one (Sudeep Holla, Jon
    Hunter).
 
  - Remove redundant calls to einj_get_available_error_type() from the
    APEI EINJ driver (Zaid Alali).
 
  - Fix a typo for MECHREVO in irq1_edge_low_force_override[] (Mingcong
    Bai).
 
  - Add an LPS0 check() callback to the AMD pinctrl driver and fix up
    config symbol dependencies in it (Mario Limonciello, Rafael Wysocki).
 
  - Avoid initializing the ACPI platform profile driver on non-ACPI
    platforms (Alexandre Ghiti).
 
  - Document that references to ACPI data (non-device) nodes should use
    string-only references in hierarchical data node packages (Sakari
    Ailus).
 
  - Fail the ACPI bus registration if acpi_kobj registration fails (Armin
    Wolf).
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Merge tag 'acpi-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI updates from Rafael Wysocki:
 "The most significant part of these changes is an ACPICA update
  covering two upstream ACPICA releases, 20241212 and 20250404, that
  have not been included into the kernel code base yet.

  Among other things, it adds definitions needed to address GCC 15's
  -Wunterminated-string-initialization warnings, adds support for three
  new tables (MRRM, ERDT, RIMT), extends support for two tables (RAS2,
  DMAR), and fixes some issues.

  On top of the above, there is a new parser for the MRRM table, more
  changes related to GCC 15's -Wunterminated-string-initialization
  warnings, a CPPC library update including functions related to
  autonomous CPU performance state selection, a couple of new quirks,
  some assorted fixes and some code cleanups.

  Specifics:

   - Fix two ACPICA SLAB cache leaks (Seunghun Han)

   - Add EINJv2 get error type action and define Error Injection Actions
     in hex values to avoid inconsistencies between the specification
     and the code (Zaid Alali)

   - Fix typo in comments for SRAT structures (Adam Lackorzynski)

   - Prevent possible loss of data in ACPICA because of u32 to u8
     conversions (Saket Dumbre)

   - Fix reading FFixedHW operation regions in ACPICA (Daniil Tatianin)

   - Add support for printing AML arguments when the ACPICA debug level
     is ACPI_LV_TRACE_POINT (Mario Limonciello)

   - Drop a stale comment about the file content from actbl2.h (Sudeep
     Holla)

   - Apply pack(1) to union aml_resource (Tamir Duberstein)

   - Fix overflow check in the ACPICA version of vsnprintf() (gldrk)

   - Interpret SIDP structures in DMAR added revision 3.4 of the VT-d
     specification (Alexey Neyman)

   - Add typedef and other definitions related to MRRM to ACPICA (Tony
     Luck)

   - Add definitions for RIMT to ACPICA (Sunil V L)

   - Fix spelling mistake "Incremement" -> "Increment" in the ACPICA
     utilities code (Colin Ian King)

   - Add typedef and other definitions for ERDT to ACPICA (Tony Luck)

   - Introduce ACPI_NONSTRING and use it (Kees Cook, Ahmed Salem)

   - Rename structure and field names of the RAS2 table in actbl2.h
     (Shiju Jose)

   - Fix up whitespace in acpica/utcache.c (Zhe Qiao)

   - Avoid sequence overread in a call to strncmp() in
     ap_get_table_length() and replace strncpy() with memcpy() in ACPICA
     in some places (Ahmed Salem)

   - Update copyright year in all ACPICA files (Saket Dumbre)

   - Add __nonstring annotations for unterminated strings in the static
     ACPI tables parsing code (Kees Cook)

   - Add support for parsing the MRRM ACPI table and sysfs files to
     describe memory regions listed in it (Tony Luck, Anil
     Keshavamurthy)

   - Remove an (explicitly) unused header file include from the VIOT
     ACPI table parser file (Andy Shevchenko)

   - Improve logging around acpi_initialize_tables() (Bartosz
     Szczepanek)

   - Clean up the initialization of CPU data structures in the ACPI
     processor driver (Zhang Rui)

   - Remove an obsolete comment regarding the C-states handling in the
     ACPI processor driver (Giovanni Gherdovich)

   - Simplify PCC shared memory region handling (Sudeep Holla)

   - Rework and extend functions for reading CPPC register values and
     for updating CPPC registers (Lifeng Zheng)

   - Add three functions related to autonomous CPU performance state
     selection to the CPPC library (Lifeng Zheng)

   - Turn the acpi_pci_root_remap_iospace() fwnode_handle parameter into
     a const pointer (Pei Xiao)

   - Round battery capacity percengate in the ACPI battery driver to the
     closest integer to avoid user confusion (shitao)

   - Make the ACPI battery driver report the current as a negative
     number to the power supply framework when the battery is
     discharging as documented (Peter Marheine)

   - Add TUXEDO InfinityBook Pro AMD Gen9 to the acpi_ec_no_wakeup[]
     list to prevent spurious wakeups from suspend-to-idle (Werner
     Sembach)

   - Convert the APEI EINJ driver to a faux device one (Sudeep Holla,
     Jon Hunter)

   - Remove redundant calls to einj_get_available_error_type() from the
     APEI EINJ driver (Zaid Alali)

   - Fix a typo for MECHREVO in irq1_edge_low_force_override[] (Mingcong
     Bai)

   - Add an LPS0 check() callback to the AMD pinctrl driver and fix up
     config symbol dependencies in it (Mario Limonciello, Rafael
     Wysocki)

   - Avoid initializing the ACPI platform profile driver on non-ACPI
     platforms (Alexandre Ghiti)

   - Document that references to ACPI data (non-device) nodes should use
     string-only references in hierarchical data node packages (Sakari
     Ailus)

   - Fail the ACPI bus registration if acpi_kobj registration fails
     (Armin Wolf)"

* tag 'acpi-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (65 commits)
  ACPI: MRRM: Fix default max memory region
  ACPI: bus: Bail out if acpi_kobj registration fails
  ACPI: platform_profile: Avoid initializing on non-ACPI platforms
  pinctrl: amd: Fix hibernation support with CONFIG_SUSPEND unset
  ACPI: tables: Improve logging around acpi_initialize_tables()
  ACPI: VIOT: Remove (explicitly) unused header
  ACPI: Add documentation for exposing MRRM data
  ACPI: MRRM: Add /sys files to describe memory ranges
  ACPI: MRRM: Minimal parse of ACPI MRRM table
  ACPICA: Update copyright year
  ACPICA: Logfile: Changes for version 20250404
  ACPICA: Replace strncpy() with memcpy()
  ACPICA: Apply ACPI_NONSTRING in more places
  ACPICA: Avoid sequence overread in call to strncmp()
  ACPICA: Adjust the position of code lines
  ACPICA: actbl2.h: ACPI 6.5: RAS2: Rename structure and field names of the RAS2 table
  ACPICA: Apply ACPI_NONSTRING
  ACPICA: Introduce ACPI_NONSTRING
  ACPICA: actbl2.h: ERDT: Add typedef and other definitions
  ACPICA: infrastructure: Add new DMT_BUF types and shorten a long name
  ...
 2025-05-27 16:32:30 -07:00
Linus Torvalds
785cdec46e Core x86 updates for v6.16: 
Boot code changes:
 
  - A large series of changes to reorganize the x86 boot code into a better isolated
    and easier to maintain base of PIC early startup code in arch/x86/boot/startup/,
    by Ard Biesheuvel.
 
    Motivation & background:
 
 	| Since commit
 	|
 	|    c88d71508e36 ("x86/boot/64: Rewrite startup_64() in C")
 	|
 	| dated Jun 6 2017, we have been using C code on the boot path in a way
 	| that is not supported by the toolchain, i.e., to execute non-PIC C
 	| code from a mapping of memory that is different from the one provided
 	| to the linker. It should have been obvious at the time that this was a
 	| bad idea, given the need to sprinkle fixup_pointer() calls left and
 	| right to manipulate global variables (including non-pointer variables)
 	| without crashing.
 	|
 	| This C startup code has been expanding, and in particular, the SEV-SNP
 	| startup code has been expanding over the past couple of years, and
 	| grown many of these warts, where the C code needs to use special
 	| annotations or helpers to access global objects.
 
    This tree includes the first phase of this work-in-progress x86 boot code
    reorganization.
 
 Scalability enhancements and micro-optimizations:
 
  - Improve code-patching scalability (Eric Dumazet)
  - Remove MFENCEs for X86_BUG_CLFLUSH_MONITOR (Andrew Cooper)
 
 CPU features enumeration updates:
 
  - Thorough reorganization and cleanup of CPUID parsing APIs (Ahmed S. Darwish)
  - Fix, refactor and clean up the cacheinfo code (Ahmed S. Darwish, Thomas Gleixner)
  - Update CPUID bitfields to x86-cpuid-db v2.3 (Ahmed S. Darwish)
 
 Memory management changes:
 
  - Allow temporary MMs when IRQs are on (Andy Lutomirski)
  - Opt-in to IRQs-off activate_mm() (Andy Lutomirski)
  - Simplify choose_new_asid() and generate better code (Borislav Petkov)
  - Simplify 32-bit PAE page table handling (Dave Hansen)
  - Always use dynamic memory layout (Kirill A. Shutemov)
  - Make SPARSEMEM_VMEMMAP the only memory model (Kirill A. Shutemov)
  - Make 5-level paging support unconditional (Kirill A. Shutemov)
  - Stop prefetching current->mm->mmap_lock on page faults (Mateusz Guzik)
  - Predict valid_user_address() returning true (Mateusz Guzik)
  - Consolidate initmem_init() (Mike Rapoport)
 
 FPU support and vector computing:
 
  - Enable Intel APX support (Chang S. Bae)
  - Reorgnize and clean up the xstate code (Chang S. Bae)
  - Make task_struct::thread constant size (Ingo Molnar)
  - Restore fpu_thread_struct_whitelist() to fix CONFIG_HARDENED_USERCOPY=y
    (Kees Cook)
  - Simplify the switch_fpu_prepare() + switch_fpu_finish() logic (Oleg Nesterov)
  - Always preserve non-user xfeatures/flags in __state_perm (Sean Christopherson)
 
 Microcode loader changes:
 
  - Help users notice when running old Intel microcode (Dave Hansen)
  - AMD: Do not return error when microcode update is not necessary (Annie Li)
  - AMD: Clean the cache if update did not load microcode (Boris Ostrovsky)
 
 Code patching (alternatives) changes:
 
  - Simplify, reorganize and clean up the x86 text-patching code (Ingo Molnar)
  - Make smp_text_poke_batch_process() subsume smp_text_poke_batch_finish()
    (Nikolay Borisov)
  - Refactor the {,un}use_temporary_mm() code (Peter Zijlstra)
 
 Debugging support:
 
  - Add early IDT and GDT loading to debug relocate_kernel() bugs (David Woodhouse)
  - Print the reason for the last reset on modern AMD CPUs (Yazen Ghannam)
  - Add AMD Zen debugging document (Mario Limonciello)
  - Fix opcode map (!REX2) superscript tags (Masami Hiramatsu)
  - Stop decoding i64 instructions in x86-64 mode at opcode (Masami Hiramatsu)
 
 CPU bugs and bug mitigations:
 
  - Remove X86_BUG_MMIO_UNKNOWN (Borislav Petkov)
  - Fix SRSO reporting on Zen1/2 with SMT disabled (Borislav Petkov)
  - Restructure and harmonize the various CPU bug mitigation methods
    (David Kaplan)
  - Fix spectre_v2 mitigation default on Intel (Pawan Gupta)
 
 MSR API:
 
  - Large MSR code and API cleanup (Xin Li)
  - In-kernel MSR API type cleanups and renames (Ingo Molnar)
 
 PKEYS:
 
  - Simplify PKRU update in signal frame (Chang S. Bae)
 
 NMI handling code:
 
  - Clean up, refactor and simplify the NMI handling code (Sohil Mehta)
  - Improve NMI duration console printouts (Sohil Mehta)
 
 Paravirt guests interface:
 
  - Restrict PARAVIRT_XXL to 64-bit only (Kirill A. Shutemov)
 
 SEV support:
 
  - Share the sev_secrets_pa value again (Tom Lendacky)
 
 x86 platform changes:
 
  - Introduce the <asm/amd/> header namespace (Ingo Molnar)
  - i2c: piix4, x86/platform: Move the SB800 PIIX4 FCH definitions to <asm/amd/fch.h>
    (Mario Limonciello)
 
 Fixes and cleanups:
 
  - x86 assembly code cleanups and fixes (Uros Bizjak)
 
  - Misc fixes and cleanups (Andi Kleen, Andy Lutomirski, Andy Shevchenko,
    Ard Biesheuvel, Bagas Sanjaya, Baoquan He, Borislav Petkov, Chang S. Bae,
    Chao Gao, Dan Williams, Dave Hansen, David Kaplan, David Woodhouse,
    Eric Biggers, Ingo Molnar, Josh Poimboeuf, Juergen Gross, Malaya Kumar Rout,
    Mario Limonciello, Nathan Chancellor, Oleg Nesterov, Pawan Gupta,
    Peter Zijlstra, Shivank Garg, Sohil Mehta, Thomas Gleixner, Uros Bizjak,
    Xin Li)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-core-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull core x86 updates from Ingo Molnar:
 "Boot code changes:

   - A large series of changes to reorganize the x86 boot code into a
     better isolated and easier to maintain base of PIC early startup
     code in arch/x86/boot/startup/, by Ard Biesheuvel.

     Motivation & background:

  	| Since commit
  	|
  	|    c88d71508e36 ("x86/boot/64: Rewrite startup_64() in C")
  	|
  	| dated Jun 6 2017, we have been using C code on the boot path in a way
  	| that is not supported by the toolchain, i.e., to execute non-PIC C
  	| code from a mapping of memory that is different from the one provided
  	| to the linker. It should have been obvious at the time that this was a
  	| bad idea, given the need to sprinkle fixup_pointer() calls left and
  	| right to manipulate global variables (including non-pointer variables)
  	| without crashing.
  	|
  	| This C startup code has been expanding, and in particular, the SEV-SNP
  	| startup code has been expanding over the past couple of years, and
  	| grown many of these warts, where the C code needs to use special
  	| annotations or helpers to access global objects.

     This tree includes the first phase of this work-in-progress x86
     boot code reorganization.

  Scalability enhancements and micro-optimizations:

   - Improve code-patching scalability (Eric Dumazet)

   - Remove MFENCEs for X86_BUG_CLFLUSH_MONITOR (Andrew Cooper)

  CPU features enumeration updates:

   - Thorough reorganization and cleanup of CPUID parsing APIs (Ahmed S.
     Darwish)

   - Fix, refactor and clean up the cacheinfo code (Ahmed S. Darwish,
     Thomas Gleixner)

   - Update CPUID bitfields to x86-cpuid-db v2.3 (Ahmed S. Darwish)

  Memory management changes:

   - Allow temporary MMs when IRQs are on (Andy Lutomirski)

   - Opt-in to IRQs-off activate_mm() (Andy Lutomirski)

   - Simplify choose_new_asid() and generate better code (Borislav
     Petkov)

   - Simplify 32-bit PAE page table handling (Dave Hansen)

   - Always use dynamic memory layout (Kirill A. Shutemov)

   - Make SPARSEMEM_VMEMMAP the only memory model (Kirill A. Shutemov)

   - Make 5-level paging support unconditional (Kirill A. Shutemov)

   - Stop prefetching current->mm->mmap_lock on page faults (Mateusz
     Guzik)

   - Predict valid_user_address() returning true (Mateusz Guzik)

   - Consolidate initmem_init() (Mike Rapoport)

  FPU support and vector computing:

   - Enable Intel APX support (Chang S. Bae)

   - Reorgnize and clean up the xstate code (Chang S. Bae)

   - Make task_struct::thread constant size (Ingo Molnar)

   - Restore fpu_thread_struct_whitelist() to fix
     CONFIG_HARDENED_USERCOPY=y (Kees Cook)

   - Simplify the switch_fpu_prepare() + switch_fpu_finish() logic (Oleg
     Nesterov)

   - Always preserve non-user xfeatures/flags in __state_perm (Sean
     Christopherson)

  Microcode loader changes:

   - Help users notice when running old Intel microcode (Dave Hansen)

   - AMD: Do not return error when microcode update is not necessary
     (Annie Li)

   - AMD: Clean the cache if update did not load microcode (Boris
     Ostrovsky)

  Code patching (alternatives) changes:

   - Simplify, reorganize and clean up the x86 text-patching code (Ingo
     Molnar)

   - Make smp_text_poke_batch_process() subsume
     smp_text_poke_batch_finish() (Nikolay Borisov)

   - Refactor the {,un}use_temporary_mm() code (Peter Zijlstra)

  Debugging support:

   - Add early IDT and GDT loading to debug relocate_kernel() bugs
     (David Woodhouse)

   - Print the reason for the last reset on modern AMD CPUs (Yazen
     Ghannam)

   - Add AMD Zen debugging document (Mario Limonciello)

   - Fix opcode map (!REX2) superscript tags (Masami Hiramatsu)

   - Stop decoding i64 instructions in x86-64 mode at opcode (Masami
     Hiramatsu)

  CPU bugs and bug mitigations:

   - Remove X86_BUG_MMIO_UNKNOWN (Borislav Petkov)

   - Fix SRSO reporting on Zen1/2 with SMT disabled (Borislav Petkov)

   - Restructure and harmonize the various CPU bug mitigation methods
     (David Kaplan)

   - Fix spectre_v2 mitigation default on Intel (Pawan Gupta)

  MSR API:

   - Large MSR code and API cleanup (Xin Li)

   - In-kernel MSR API type cleanups and renames (Ingo Molnar)

  PKEYS:

   - Simplify PKRU update in signal frame (Chang S. Bae)

  NMI handling code:

   - Clean up, refactor and simplify the NMI handling code (Sohil Mehta)

   - Improve NMI duration console printouts (Sohil Mehta)

  Paravirt guests interface:

   - Restrict PARAVIRT_XXL to 64-bit only (Kirill A. Shutemov)

  SEV support:

   - Share the sev_secrets_pa value again (Tom Lendacky)

  x86 platform changes:

   - Introduce the <asm/amd/> header namespace (Ingo Molnar)

   - i2c: piix4, x86/platform: Move the SB800 PIIX4 FCH definitions to
     <asm/amd/fch.h> (Mario Limonciello)

  Fixes and cleanups:

   - x86 assembly code cleanups and fixes (Uros Bizjak)

   - Misc fixes and cleanups (Andi Kleen, Andy Lutomirski, Andy
     Shevchenko, Ard Biesheuvel, Bagas Sanjaya, Baoquan He, Borislav
     Petkov, Chang S. Bae, Chao Gao, Dan Williams, Dave Hansen, David
     Kaplan, David Woodhouse, Eric Biggers, Ingo Molnar, Josh Poimboeuf,
     Juergen Gross, Malaya Kumar Rout, Mario Limonciello, Nathan
     Chancellor, Oleg Nesterov, Pawan Gupta, Peter Zijlstra, Shivank
     Garg, Sohil Mehta, Thomas Gleixner, Uros Bizjak, Xin Li)"

* tag 'x86-core-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (331 commits)
  x86/bugs: Fix spectre_v2 mitigation default on Intel
  x86/bugs: Restructure ITS mitigation
  x86/xen/msr: Fix uninitialized variable 'err'
  x86/msr: Remove a superfluous inclusion of <asm/asm.h>
  x86/paravirt: Restrict PARAVIRT_XXL to 64-bit only
  x86/mm/64: Make 5-level paging support unconditional
  x86/mm/64: Make SPARSEMEM_VMEMMAP the only memory model
  x86/mm/64: Always use dynamic memory layout
  x86/bugs: Fix indentation due to ITS merge
  x86/cpuid: Rename hypervisor_cpuid_base()/for_each_possible_hypervisor_cpuid_base() to cpuid_base_hypervisor()/for_each_possible_cpuid_base_hypervisor()
  x86/cpu/intel: Rename CPUID(0x2) descriptors iterator parameter
  x86/cacheinfo: Rename CPUID(0x2) descriptors iterator parameter
  x86/cpuid: Rename cpuid_get_leaf_0x2_regs() to cpuid_leaf_0x2()
  x86/cpuid: Rename have_cpuid_p() to cpuid_feature()
  x86/cpuid: Set <asm/cpuid/api.h> as the main CPUID header
  x86/cpuid: Move CPUID(0x2) APIs into <cpuid/api.h>
  x86/msr: Add rdmsrl_on_cpu() compatibility wrapper
  x86/mm: Fix kernel-doc descriptions of various pgtable methods
  x86/asm-offsets: Export certain 'struct cpuinfo_x86' fields for 64-bit asm use too
  x86/boot: Defer initialization of VM space related global variables
  ...
 2025-05-26 16:04:17 -07:00
Linus Torvalds
eaed94d1f6 Scheduler updates for v6.16: 
Core & fair scheduler changes:
 
   - Tweak wait_task_inactive() to force dequeue sched_delayed tasks
     (John Stultz)
 
   - Adhere to place_entity() constraints (Peter Zijlstra)
 
   - Allow decaying util_est when util_avg > CPU capacity (Pierre Gondois)
 
   - Fix up wake_up_sync() vs DELAYED_DEQUEUE (Xuewen Yan)
 
 Energy management:
 
   - Introduce sched_update_asym_prefer_cpu() (K Prateek Nayak)
 
   - cpufreq/amd-pstate: Update asym_prefer_cpu when core rankings change
     (K Prateek Nayak)
 
   - Align uclamp and util_est and call before freq update (Xuewen Yan)
 
 CPU isolation:
 
   - Make use of more than one housekeeping CPU (Phil Auld)
 
 RT scheduler:
 
   - Fix race in push_rt_task() (Harshit Agarwal)
 
   - Add kernel cmdline option for rt_group_sched (Michal Koutný)
 
 Scheduler topology support:
 
   - Improve topology_span_sane speed (Steve Wahl)
 
 Scheduler debugging:
 
   - Move and extend the sched_process_exit() tracepoint (Andrii Nakryiko)
 
   - Add RT_GROUP WARN checks for non-root task_groups (Michal Koutný)
 
   - Fix trace_sched_switch(.prev_state) (Peter Zijlstra)
 
   - Untangle cond_resched() and live-patching (Peter Zijlstra)
 
 Fixes and cleanups:
 
   - Misc fixes and cleanups (K Prateek Nayak, Michal Koutný,
     Peter Zijlstra, Xuewen Yan)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler updates from Ingo Molnar:
 "Core & fair scheduler changes:

   - Tweak wait_task_inactive() to force dequeue sched_delayed tasks
     (John Stultz)

   - Adhere to place_entity() constraints (Peter Zijlstra)

   - Allow decaying util_est when util_avg > CPU capacity (Pierre
     Gondois)

   - Fix up wake_up_sync() vs DELAYED_DEQUEUE (Xuewen Yan)

  Energy management:

   - Introduce sched_update_asym_prefer_cpu() (K Prateek Nayak)

   - cpufreq/amd-pstate: Update asym_prefer_cpu when core rankings
     change (K Prateek Nayak)

   - Align uclamp and util_est and call before freq update (Xuewen Yan)

  CPU isolation:

   - Make use of more than one housekeeping CPU (Phil Auld)

  RT scheduler:

   - Fix race in push_rt_task() (Harshit Agarwal)

   - Add kernel cmdline option for rt_group_sched (Michal Koutný)

  Scheduler topology support:

   - Improve topology_span_sane speed (Steve Wahl)

  Scheduler debugging:

   - Move and extend the sched_process_exit() tracepoint (Andrii
     Nakryiko)

   - Add RT_GROUP WARN checks for non-root task_groups (Michal Koutný)

   - Fix trace_sched_switch(.prev_state) (Peter Zijlstra)

   - Untangle cond_resched() and live-patching (Peter Zijlstra)

  Fixes and cleanups:

   - Misc fixes and cleanups (K Prateek Nayak, Michal Koutný, Peter
     Zijlstra, Xuewen Yan)"

* tag 'sched-core-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (26 commits)
  sched/uclamp: Align uclamp and util_est and call before freq update
  sched/util_est: Simplify condition for util_est_{en,de}queue()
  sched/fair: Fixup wake_up_sync() vs DELAYED_DEQUEUE
  sched,livepatch: Untangle cond_resched() and live-patching
  sched/core: Tweak wait_task_inactive() to force dequeue sched_delayed tasks
  sched/fair: Adhere to place_entity() constraints
  sched/debug: Print the local group's asym_prefer_cpu
  cpufreq/amd-pstate: Update asym_prefer_cpu when core rankings change
  sched/topology: Introduce sched_update_asym_prefer_cpu()
  sched/fair: Use READ_ONCE() to read sg->asym_prefer_cpu
  sched/isolation: Make use of more than one housekeeping cpu
  sched/rt: Fix race in push_rt_task
  sched: Add annotations to RT_GROUP_SCHED fields
  sched: Add RT_GROUP WARN checks for non-root task_groups
  sched: Do not construct nor expose RT_GROUP_SCHED structures if disabled
  sched: Bypass bandwitdh checks with runtime disabled RT_GROUP_SCHED
  sched: Skip non-root task_groups with disabled RT_GROUP_SCHED
  sched: Add commadline option for RT_GROUP_SCHED toggling
  sched: Always initialize rt_rq's task_group
  sched: Remove unneeed macro wrap
  ...
 2025-05-26 15:19:58 -07:00
Rafael J. Wysocki
0a17adc6be Merge branches 'acpi-processor' and 'acpi-cppc' 
Merge ACPI processor driver updates and ACPI CPPC library updates for
6.16-rc1:

 - Clean up the initialization of CPU data structures in the ACPI
   processor driver (Zhang Rui).

 - Remove an obsolete comment regarding the C-states handling in the
   ACPI processor driver (Giovanni Gherdovich).

 - Simplify PCC shared memory region handling (Sudeep Holla).

 - Rework and extend functions for reading CPPC register values and for
   updating CPPC registers (Lifeng Zheng).

 - Add three functions related to autonomous CPU performance state
   selection to the CPPC library (Lifeng Zheng).

* acpi-processor:
  ACPI: processor: idle: Remove redundant pr->power.count assignment
  ACPI: processor: idle: Set pr->flags.power unconditionally
  ACPI: processor: idle: Remove obsolete comment

* acpi-cppc:
  ACPI: CPPC: Add three functions related to autonomous selection
  ACPI: CPPC: Modify cppc_get_auto_sel_caps() to cppc_get_auto_sel()
  ACPI: CPPC: Refactor register value get and set ABIs
  ACPI: CPPC: Add cppc_set_reg_val()
  ACPI: CPPC: Extract cppc_get_reg_val_in_pcc()
  ACPI: CPPC: Rename cppc_get_perf() to cppc_get_reg_val()
  ACPI: CPPC: Optimize cppc_get_perf()
  ACPI: CPPC: Add IS_OPTIONAL_CPC_REG macro to judge if a cpc_reg is optional
  ACPI: CPPC: Simplify PCC shared memory region handling
  ACPI: PCC: Simplify PCC shared memory region handling
 2025-05-26 18:37:38 +02:00
Rafael J. Wysocki
0c905cadf3 CPUFreq updates for 6.16 
- Rust abstractions for CPUFreq framework (Viresh Kumar).
 
 - Rust abstractions for OPP framework (Viresh Kumar).
 
 - Basic Rust abstractions for Clk and Cpumask frameworks (Viresh Kumar).
 
 - Minor cleanup to the SCMI cpufreq driver (Mike Tipton).
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Merge tag 'cpufreq-arm-updates-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

Merge ARM CPUFreq updates for 6.16 from Viresh Kumar:

"- Rust abstractions for CPUFreq framework (Viresh Kumar).

 - Rust abstractions for OPP framework (Viresh Kumar).

 - Basic Rust abstractions for Clk and Cpumask frameworks (Viresh Kumar).

 - Minor cleanup to the SCMI cpufreq driver (Mike Tipton)."

* tag 'cpufreq-arm-updates-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: (24 commits)
  cpufreq: scmi: Skip SCMI devices that aren't used by the CPUs
  cpufreq: Add Rust-based cpufreq-dt driver
  rust: opp: Extend OPP abstractions with cpufreq support
  rust: cpufreq: Extend abstractions for driver registration
  rust: cpufreq: Extend abstractions for policy and driver ops
  rust: cpufreq: Add initial abstractions for cpufreq framework
  rust: opp: Add abstractions for the configuration options
  rust: opp: Add abstractions for the OPP table
  rust: opp: Add initial abstractions for OPP framework
  rust: cpu: Add from_cpu()
  rust: macros: enable use of hyphens in module names
  rust: clk: Add initial abstractions
  rust: clk: Add helpers for Rust code
  MAINTAINERS: Add entry for Rust cpumask API
  rust: cpumask: Add initial abstractions
  rust: cpumask: Add few more helpers
  rust: devres: require a bound device
  rust: pci: move iomap_region() to impl Device<Bound>
  rust: device: implement Bound device context
  rust: pci: preserve device context in AsRef
  ...
 2025-05-21 22:49:34 +02:00
Lifeng Zheng
922607a2b4 cpufreq: CPPC: Add support for autonomous selection 
Add sysfs interfaces for CPPC autonomous selection in the cppc_cpufreq
driver.

Signed-off-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Reviewed-by: Sumit Gupta <sumitg@nvidia.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/20250507031941.2812701-1-zhenglifeng1@huawei.com
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-05-21 22:47:44 +02:00
Bowen Yu
1da98dc52b cpufreq: Update sscanf() to kstrtouint() 
In store_scaling_setspeed(), sscanf is still used to read to sysfs.
Newer kstrtox provide more features including overflow protection,
better errorhandling and allows for other systems of numeration. It
is therefore better to update sscanf() to kstrtouint().

Signed-off-by: Bowen Yu <yubowen8@huawei.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/20250519070938.931396-1-yubowen8@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-05-21 22:27:36 +02:00
Bowen Yu
9c5075fc9d cpufreq: Replace magic number 
Setting the length of str_governor with a magic number could cause
overflow when max length increases, it is better to use the defined
macro in this case.

Signed-off-by: Bowen Yu <yubowen8@huawei.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/20250519070908.930879-1-yubowen8@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-05-21 22:19:10 +02:00
Mike Tipton
6c9bb86922 cpufreq: scmi: Skip SCMI devices that aren't used by the CPUs 
Currently, all SCMI devices with performance domains attempt to register
a cpufreq driver, even if their performance domains aren't used to
control the CPUs. The cpufreq framework only supports registering a
single driver, so only the first device will succeed. And if that device
isn't used for the CPUs, then cpufreq will scale the wrong domains.

To avoid this, return early from scmi_cpufreq_probe() if the probing
SCMI device isn't referenced by the CPU device phandles.

This keeps the existing assumption that all CPUs are controlled by a
single SCMI device.

Signed-off-by: Mike Tipton <quic_mdtipton@quicinc.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
 2025-05-20 11:24:18 +05:30
Viresh Kumar
c410aabd03 Merge branch 'rust/cpufreq-dt' into cpufreq/arm/linux-next 2025-05-20 11:24:12 +05:30
Viresh Kumar
06149d8f22 cpufreq: Add Rust-based cpufreq-dt driver 
Introduce a Rust-based implementation of the cpufreq-dt driver, covering
most of the functionality provided by the existing C version. Some
features, such as retrieving platform data from `cpufreq-dt-platdev.c`,
are still pending.

The driver has been tested with QEMU, and frequency scaling works as
expected.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
 2025-05-20 11:21:11 +05:30
Rafael J. Wysocki
fd3d883aa5 amd-pstate changes for 6.16 (5/15/25) 
Fix an error caught with -Werror in amd-pstate-ut.
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Merge tag 'amd-pstate-v6.16-2025-05-15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux

Merge an amd-pstate driver fix for 6.16 (5/15/25) from Mario
Liminciello:

"Fix an error caught with -Werror in amd-pstate-ut."

* tag 'amd-pstate-v6.16-2025-05-15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
  cpufreq/amd-pstate: Avoid shadowing ret in amd_pstate_ut_check_driver()
 2025-05-16 18:39:08 +02:00
Seyediman Seyedarab
a0982afa09 cpufreq: drop redundant cpus_read_lock() from store_local_boost() 
Lockdep reports a possible circular locking dependency [1] when
cpu_hotplug_lock is acquired inside store_local_boost(), after
policy->rwsem has already been taken by store().

However, the boost update is strictly per-policy and does not
access shared state or iterate over all policies.

Since policy->rwsem is already held, this is enough to serialize
against concurrent topology changes for the current policy.

Remove the cpus_read_lock() to resolve the lockdep warning and
avoid unnecessary locking.

 [1]
 ======================================================
 WARNING: possible circular locking dependency detected
 6.15.0-rc6-debug-gb01fc4eca73c #1 Not tainted
 ------------------------------------------------------
 power-profiles-/588 is trying to acquire lock:
 ffffffffb3a7d910 (cpu_hotplug_lock){++++}-{0:0}, at: store_local_boost+0x56/0xd0

 but task is already holding lock:
 ffff8b6e5a12c380 (&policy->rwsem){++++}-{4:4}, at: store+0x37/0x90

 which lock already depends on the new lock.

 the existing dependency chain (in reverse order) is:

 -> #2 (&policy->rwsem){++++}-{4:4}:
        down_write+0x29/0xb0
        cpufreq_online+0x7e8/0xa40
        cpufreq_add_dev+0x82/0xa0
        subsys_interface_register+0x148/0x160
        cpufreq_register_driver+0x15d/0x260
        amd_pstate_register_driver+0x36/0x90
        amd_pstate_init+0x1e7/0x270
        do_one_initcall+0x68/0x2b0
        kernel_init_freeable+0x231/0x270
        kernel_init+0x15/0x130
        ret_from_fork+0x2c/0x50
        ret_from_fork_asm+0x11/0x20

 -> #1 (subsys mutex#3){+.+.}-{4:4}:
        __mutex_lock+0xc2/0x930
        subsys_interface_register+0x7f/0x160
        cpufreq_register_driver+0x15d/0x260
        amd_pstate_register_driver+0x36/0x90
        amd_pstate_init+0x1e7/0x270
        do_one_initcall+0x68/0x2b0
        kernel_init_freeable+0x231/0x270
        kernel_init+0x15/0x130
        ret_from_fork+0x2c/0x50
        ret_from_fork_asm+0x11/0x20

 -> #0 (cpu_hotplug_lock){++++}-{0:0}:
        __lock_acquire+0x10ed/0x1850
        lock_acquire.part.0+0x69/0x1b0
        cpus_read_lock+0x2a/0xc0
        store_local_boost+0x56/0xd0
        store+0x50/0x90
        kernfs_fop_write_iter+0x132/0x200
        vfs_write+0x2b3/0x590
        ksys_write+0x74/0xf0
        do_syscall_64+0xbb/0x1d0
        entry_SYSCALL_64_after_hwframe+0x56/0x5e

Signed-off-by: Seyediman Seyedarab <ImanDevel@gmail.com>
Link: https://patch.msgid.link/20250513015726.1497-1-ImanDevel@gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-05-14 14:41:15 +02:00
Nathan Chancellor
f6b1eebbdb cpufreq/amd-pstate: Avoid shadowing ret in amd_pstate_ut_check_driver() 
Clang warns (or errors with CONFIG_WERROR=y):

  drivers/cpufreq/amd-pstate-ut.c:262:6: error: variable 'ret' is uninitialized when used here [-Werror,-Wuninitialized]
    262 |         if (ret)
        |             ^~~

ret is declared at the top of the function and in the for loop so the
initialization of ret is local to the loop. Remove the declaration in
the for loop so that ret is always used initialized.

Fixes: d26d16438bc5 ("amd-pstate-ut: Reset amd-pstate driver mode after running selftests")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202505072226.g2QclhaR-lkp@intel.com/
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20250512-amd-pstate-ut-uninit-ret-v1-1-fcb4104f502e@kernel.org
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
 2025-05-13 11:12:44 -05:00
Rafael J. Wysocki
05cf8b8c51 cpufreq: intel_pstate: EAS: Increase cost for CPUs using L3 cache 
On some hybrid platforms some efficient CPUs (E-cores) are not connected
to the L3 cache, but there are no other differences between them and the
other E-cores that use L3.  In that case, it is generally more efficient
to run "light" workloads on the E-cores that do not use L3 and allow all
of the cores using L3, including P-cores, to go into idle states.

For this reason, slightly increase the cost for all CPUs sharing the L3
cache to make EAS prefer CPUs that do not use it to the other CPUs of
the same type (if any).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2032776.usQuhbGJ8B@rjwysocki.net
 2025-05-13 14:35:25 +02:00
Rafael J. Wysocki
7b010f9b90 cpufreq: intel_pstate: EAS support for hybrid platforms 
Modify intel_pstate to register EM perf domains for CPUs on hybrid
platforms without SMT which causes EAS to be enabled on them when
schedutil is used as the cpufreq governor (which requires intel_pstate
to operate in the passive mode).

This change is targeting platforms (for example, Lunar Lake) where the
"little" CPUs (E-cores) are always more energy-efficient than the "big"
or "performance" CPUs (P-cores) when run at the same HWP performance
level, so it is sufficient to tell EAS that E-cores are always preferred
(so long as there is enough spare capacity on one of them to run the
given task).  However, migrating tasks between CPUs of the same type
too often is not desirable because it may hurt both performance and
energy efficiency due to leaving warm caches behind.

For this reason, register a separate perf domain for each CPU and choose
the cost values for them so that the cost mostly depends on the CPU type,
but there is also a small component of it depending on the performance
level (utilization) which helps to balance the load between CPUs of the
same type.

The cost component related to the CPU type is computed with the help of
the observation that the IPC metric value for a given CPU is inversely
proportional to its performance-to-frequency scaling factor and the cost
of running code on it can be assumed to be roughly proportional to that
IPC ratio (in principle, the higher the IPC ratio, the more resources
are utilized when running at a given frequency, so the cost should be
higher).

For all CPUs that are online at the system initialization time, EM perf
domains are registered when the driver starts up, after asymmetric
capacity support has been enabled.  For the CPUs that become online
later, EM perf domains are registered after setting the asymmetric
capacity for them.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Christian Loehle <christian.loehle@arm.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://patch.msgid.link/6057101.MhkbZ0Pkbq@rjwysocki.net
 2025-05-13 14:35:25 +02:00
Rafael J. Wysocki
f7e9228532 cpufreq: Drop policy locking from cpufreq_policy_is_good_for_eas() 
Policy locking was added to cpufreq_policy_is_good_for_eas() by commit
4854649b1fb4 ("cpufreq/sched: Move cpufreq-specific EAS checks to
cpufreq") to address a theoretical race condition, but it turned out to
introduce a circular locking dependency between the policy rwsem and
sched_domains_mutex via cpuset_mutex. This leads to a board lockup on
OdroidN2 that is based on the ARM64 Amlogic Meson SoC.

Drop the policy locking from cpufreq_policy_is_good_for_eas() to address
this issue.

Fixes: 4854649b1fb4 ("cpufreq/sched: Move cpufreq-specific EAS checks to cpufreq")
Closes: https://lore.kernel.org/linux-pm/1bf3df62-0641-459f-99fc-fd511e564b84@samsung.com/
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2806514.mvXUDI8C0e@rjwysocki.net
 2025-05-13 14:27:11 +02:00
Jim Cromie
91e53493ee powernow: use pr_info_once 
This reduces log-msgs during boot from many pages to ~10 occurrences.  I
didn't investigate why it wasn't just 1, maybe its a low-level service to
other modules, re-probed by each of them ?

Link: https://lkml.kernel.org/r/20250325235156.663269-4-jim.cromie@gmail.com
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Louis Chauvet <louis.chauvet@bootlin.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2025-05-11 17:54:05 -07:00
Rafael J. Wysocki
41abd479d1 amd-pstate content for 6.16 (5/8/25) 
Add support for a new feature on some BIOS that allows setting
 "lowest CPU minimum frequency".
 
 Fix the amd-pstate-ut unit tests to restore system settings when done.
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Merge tag 'amd-pstate-v6.16-2025-05-08' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux

Merge amd-pstate content for 6.16 (5/8/25) from Mario Limonciello:

 - Add support for a new feature on some BIOS that allows setting
   "lowest CPU minimum frequency".

 - Fix the amd-pstate-ut unit tests to restore system settings when
   done.

* tag 'amd-pstate-v6.16-2025-05-08' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
  amd-pstate-ut: Reset amd-pstate driver mode after running selftests
  cpufreq/amd-pstate: Add support for the "Requested CPU Min frequency" BIOS option
  cpufreq/amd-pstate: Add offline, online and suspend callbacks for amd_pstate_driver
  cpufreq/amd-pstate: Move max_perf limiting in amd_pstate_update
 2025-05-09 15:17:44 +02:00
Ricardo Neri
f1a50492f5 cpufreq: intel_pstate: Populate the cpu_capacity sysfs entries 
Intel hybrid processors have CPUs of different capacity. Populate the
interface /sys/devices/system/cpu/cpuN/cpu_capacity.

This interface uses the per-CPU variable `cpu_scale`. On x86 this
variable has no other use besides feeding the sysfs entries. Initialize
it when setting CPU capacity for the scheduler and scale-invariant code.
Feed it with arch_scale_cpu_capacity() as it gives capacity normalized
to the interval [0, SCHED_CAPACITY_SCALE].

Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-05-07 21:56:55 +02:00
Rafael J. Wysocki
4854649b1f cpufreq/sched: Move cpufreq-specific EAS checks to cpufreq 
Doing cpufreq-specific EAS checks that require accessing policy
internals directly from sched_is_eas_possible() is a bit unfortunate,
so introduce cpufreq_ready_for_eas() in cpufreq, move those checks
into that new function and make sched_is_eas_possible() call it.

While at it, address a possible race between the EAS governor check
and governor change by doing the former under the policy rwsem.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
Tested-by: Christian Loehle <christian.loehle@arm.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://patch.msgid.link/2317800.iZASKD2KPV@rjwysocki.net
 2025-05-07 21:17:56 +02:00
Ingo Molnar
570d58b12f Linux 6.15-rc5 
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Merge tag 'v6.15-rc5' into x86/msr, to pick up fixes and to resolve conflicts

 Conflicts:
	drivers/cpufreq/intel_pstate.c

Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2025-05-06 19:42:00 +02:00
Swapnil Sapkal
d26d16438b amd-pstate-ut: Reset amd-pstate driver mode after running selftests 
In amd-pstate-ut, one of the basic test is to switch between all
possible mode combinations. After running this test the mode of the
amd-pstate driver is active mode. Store and reset the mode to its original
state.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Swapnil Sapkal <swapnil.sapkal@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20250430064206.7402-1-swapnil.sapkal@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
 2025-05-05 12:07:42 -05:00
Rafael J. Wysocki
400da808fd Merge back cpufreq material for 6.16 2025-05-04 12:35:42 +02:00
Xin Li (Intel)
efef7f184f x86/msr: Add explicit includes of <asm/msr.h> 
For historic reasons there are some TSC-related functions in the
<asm/msr.h> header, even though there's an <asm/tsc.h> header.

To facilitate the relocation of rdtsc{,_ordered}() from <asm/msr.h>
to <asm/tsc.h> and to eventually eliminate the inclusion of
<asm/msr.h> in <asm/tsc.h>, add an explicit <asm/msr.h> dependency
to the source files that reference definitions from <asm/msr.h>.

[ mingo: Clarified the changelog. ]

Signed-off-by: Xin Li (Intel) <xin@zytor.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Uros Bizjak <ubizjak@gmail.com>
Link: https://lore.kernel.org/r/20250501054241.1245648-1-xin@zytor.com
 2025-05-02 10:23:47 +02:00
Ingo Molnar
0c7b20b852 Linux 6.15-rc4 
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Merge tag 'v6.15-rc4' into x86/msr, to pick up fixes and resolve conflicts

Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2025-05-02 09:43:44 +02:00
Lifeng Zheng
2605e4ab66 ACPI: CPPC: Modify cppc_get_auto_sel_caps() to cppc_get_auto_sel() 
Modify cppc_get_auto_sel_caps() to cppc_get_auto_sel(). Using a
cppc_perf_caps to carry the value is unnecessary.

Add a check to ensure the pointer 'enable' is not null.

Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patch.msgid.link/20250411093855.982491-8-zhenglifeng1@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-04-30 22:01:31 +02:00
Srinivas Pandruvada
ac4e04d9e3 cpufreq: intel_pstate: Unchecked MSR aceess in legacy mode 
When turbo mode is unavailable on a Skylake-X system, executing the
command:

 # echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo

results in an unchecked MSR access error:

 WRMSR to 0x199 (attempted to write 0x0000000100001300).

This issue was reproduced on an OEM (Original Equipment Manufacturer)
system and is not a common problem across all Skylake-X systems.

This error occurs because the MSR 0x199 Turbo Engage Bit (bit 32) is set
when turbo mode is disabled. The issue arises when intel_pstate fails to
detect that turbo mode is disabled. Here intel_pstate relies on
MSR_IA32_MISC_ENABLE bit 38 to determine the status of turbo mode.
However, on this system, bit 38 is not set even when turbo mode is
disabled.

According to the Intel Software Developer's Manual (SDM), the BIOS sets
this bit during platform initialization to enable or disable
opportunistic processor performance operations. Logically, this bit
should be set in such cases. However, the SDM also specifies that "OS
and applications must use CPUID leaf 06H to detect processors with
opportunistic processor performance operations enabled."

Therefore, in addition to checking MSR_IA32_MISC_ENABLE bit 38, verify
that CPUID.06H:EAX[1] is 0 to accurately determine if turbo mode is
disabled.

Fixes: 4521e1a0ce17 ("cpufreq: intel_pstate: Reflect current no_turbo state correctly")
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-04-30 16:27:34 +02:00
Dhananjay Ugwekar
608a76b652 cpufreq/amd-pstate: Add support for the "Requested CPU Min frequency" BIOS option 
Initialize lower frequency limit to the "Requested CPU Min frequency"
BIOS option (if it is set) value as part of the driver->init()
callback. The BIOS specified value is passed by the PMFW as min_perf in
CPPC_REQ MSR. To ensure that we don't mistake a stale min_perf value in
CPPC_REQ value as the "Requested CPU Min frequency" during a kexec wakeup,
reset the CPPC_REQ.min_perf value back to the BIOS specified one in the
offline, exit and suspend callbacks.

amd_pstate_target() and amd_pstate_epp_update_limit() which are invoked
as part of the resume() and online() callbacks will take care of restoring
the CPPC_REQ back to the correct values.

Signed-off-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20250428071623.4309-1-dhananjay.ugwekar@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
 2025-04-28 16:09:35 -05:00
Dhananjay Ugwekar
98b52c6b0b cpufreq/amd-pstate: Add offline, online and suspend callbacks for amd_pstate_driver 
Rename and use the existing amd_pstate_epp callbacks for amd_pstate driver
as well. Remove the debug print in online callback while at it.

These callbacks will be needed to support the "Requested CPU Min Frequency"
BIOS option.

Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Link: https://lore.kernel.org/r/20250428062520.4997-2-dhananjay.ugwekar@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
 2025-04-28 16:09:35 -05:00
Rafael J. Wysocki
b79028039f cpufreq: Fix setting policy limits when frequency tables are used 
Commit 7491cdf46b5c ("cpufreq: Avoid using inconsistent policy->min and
policy->max") overlooked the fact that policy->min and policy->max were
accessed directly in cpufreq_frequency_table_target() and in the
functions called by it.  Consequently, the changes made by that commit
led to problems with setting policy limits.

Address this by passing the target frequency limits to __resolve_freq()
and cpufreq_frequency_table_target() and propagating them to the
functions called by the latter.

Fixes: 7491cdf46b5c ("cpufreq: Avoid using inconsistent policy->min and policy->max")
Cc: 5.16+ <stable@vger.kernel.org> # 5.16+
Closes: https://lore.kernel.org/linux-pm/aAplED3IA_J0eZN0@linaro.org/
Reported-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Link: https://patch.msgid.link/5896780.DvuYhMxLoT@rjwysocki.net
 2025-04-28 14:36:41 +02:00
Viresh Kumar
121baab7b8 cpufreq: Force sync policy boost with global boost on sysfs update 
If the global boost flag is enabled and policy boost flag is disabled, a
call to `cpufreq_boost_trigger_state(true)` must enable the policy's
boost state.

The current code misses that because of an optimization. Fix it.

Suggested-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/852ff11c589e6300730d207baac195b2d9d8b95f.1745511526.git.viresh.kumar@linaro.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-04-25 18:28:22 +02:00
Viresh Kumar
0e8d8560fe cpufreq: Preserve policy's boost state after resume 
If the global boost flag was enabled and policy boost flag was disabled
before a suspend resume cycle, cpufreq_online() will enable the policy
boost flag on resume.

While it is important for the policy boost flag to mirror the global
boost flag when a policy is first created, it should be avoided when the
policy is reinitialized (for example after a suspend resume cycle).

Though, if the global boost flag is disabled at this point of time, we
want to make sure policy boost flag is disabled too.

Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/de5c72a0af101049204305c73cd30eb3a3e7b4a0.1745511526.git.viresh.kumar@linaro.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-04-25 18:28:22 +02:00
Viresh Kumar
27241c8b63 cpufreq: Introduce policy_set_boost() 
Introduce policy_set_boost() to update boost state of a cpufreq policy.

No intentional function change.

Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/1863178ac17340c810519c8593014b8e561797ea.1745511526.git.viresh.kumar@linaro.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-04-25 18:28:22 +02:00
Viresh Kumar
c347f31ae2 cpufreq: Don't unnecessarily call set_boost() 
The policy specific boost value may already be set correctly in
cpufreq_boost_trigger_state(), don't update it again unnecessarily.

Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/3003fbdcc1850128fe7fb653d7ddb8afc4d66170.1745511526.git.viresh.kumar@linaro.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-04-25 18:28:22 +02:00
Rafael J. Wysocki
3b4628a8af Merge back cpufreq material for 6.16 2025-04-25 18:23:40 +02:00
Viresh Kumar
3d59224947 cpufreq: ACPI: Re-sync CPU boost state on system resume 
During CPU hotunplug events (such as those occurring during
suspend/resume cycles), platform firmware may modify the CPU boost
state.

If boost was disabled prior to CPU removal, it correctly remains
disabled upon re-plug. However, if firmware re-enables boost while the
CPU is offline, the CPU may return with boost enabled—even if it was
originally disabled—once it is hotplugged back in. This leads to
inconsistent behavior and violates user or kernel policy expectations.

To maintain consistency, ensure the boost state is re-synchronized with
the kernel policy when a CPU is hotplugged back in.

Note: This re-synchronization is not necessary during the initial call
to ->init() for a CPU, as the cpufreq core handles it via
cpufreq_online(). At that point, acpi_cpufreq_driver.boost_enabled is
initialized to the value returned by boost_state(0).

Fixes: 2b16c631832d ("cpufreq: ACPI: Remove set_boost in acpi_cpufreq_cpu_init()")
Reported-by: Nicholas Chin <nic.c3.14@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220013
Tested-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/9c7de55fb06015c1b77e7dafd564b659838864e0.1745511526.git.viresh.kumar@linaro.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2025-04-25 18:22:46 +02:00
Rafael J. Wysocki
5786ef8ad8 ARM cpufreq fixes for 6.15-rc 
- Fix possible out-of-bound / null-ptr-deref in drivers (Andre Przywara
   and Henry Martin).
 
 - Fix Kconfig issues with compile-test (Johan Hovold and Krzysztof
   Kozlowski).
 
 - Fix invalid return value in .get() (Marc Zyngier).
 
 - Add SM8650 to cpufreq-dt-platdev blocklist (Pengyu Luo).
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Merge tag 'cpufreq-arm-fixes-6.15-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

Merge ARM cpufreq fixes for 6.15-rc from Viresh Kumar:

"- Fix possible out-of-bound / null-ptr-deref in drivers (Andre Przywara
   and Henry Martin).

 - Fix Kconfig issues with compile-test (Johan Hovold and Krzysztof
   Kozlowski).

 - Fix invalid return value in .get() (Marc Zyngier).

 - Add SM8650 to cpufreq-dt-platdev blocklist (Pengyu Luo)."

* tag 'cpufreq-arm-fixes-6.15-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  cpufreq: fix compile-test defaults
  cpufreq: cppc: Fix invalid return value in .get() callback
  cpufreq: scpi: Fix null-ptr-deref in scpi_cpufreq_get_rate()
  cpufreq: scmi: Fix null-ptr-deref in scmi_cpufreq_get_rate()
  cpufreq: apple-soc: Fix null-ptr-deref in apple_soc_cpufreq_get_rate()
  cpufreq: Do not enable by default during compile testing
  cpufreq: Add SM8650 to cpufreq-dt-platdev blocklist
  cpufreq: sun50i: prevent out-of-bounds access
 2025-04-23 14:55:11 +02:00
Dhananjay Ugwekar
afc9506c2a cpufreq/amd-pstate: Move max_perf limiting in amd_pstate_update 
Move up the max_perf limiting, so that we clamp the des_perf with the
updated max_perf.

Signed-off-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Link: https://lore.kernel.org/r/20250415082308.3341-1-dhananjay.ugwekar@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
 2025-04-21 15:40:49 -05:00
Rafael J. Wysocki
464dc75dfe Merge back earlier cpufreq material for 6.16 2025-04-19 12:49:00 +02:00
Rafael J. Wysocki
dead17b1a2 amd-pstate content for 6.15 (4/15/25) 
Add a fix for X3D processors where depending upon what BIOS was
 set initially rankings might be set improperly.
 
 Add a fix for changing min/max limits while on the performance
 governor.
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Merge tag 'amd-pstate-v6.15-2025-04-15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux

Merge amd-pstate content for 6.15 (4/15/25) from Mario Limonciello:

"Add a fix for X3D processors where depending upon what BIOS was
 set initially rankings might be set improperly.

 Add a fix for changing min/max limits while on the performance
 governor."

* tag 'amd-pstate-v6.15-2025-04-15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
  cpufreq/amd-pstate: Enable ITMT support after initializing core rankings
  cpufreq/amd-pstate: Fix min_limit perf and freq updation for performance governor
 2025-04-17 17:55:09 +02:00
Rafael J. Wysocki
7491cdf46b cpufreq: Avoid using inconsistent policy->min and policy->max 
Since cpufreq_driver_resolve_freq() can run in parallel with
cpufreq_set_policy() and there is no synchronization between them,
the former may access policy->min and policy->max while the latter
is updating them and it may see intermediate values of them due
to the way the update is carried out.  Also the compiler is free
to apply any optimizations it wants both to the stores in
cpufreq_set_policy() and to the loads in cpufreq_driver_resolve_freq()
which may result in additional inconsistencies.

To address this, use WRITE_ONCE() when updating policy->min and
policy->max in cpufreq_set_policy() and use READ_ONCE() for reading
them in cpufreq_driver_resolve_freq().  Moreover, rearrange the update
in cpufreq_set_policy() to avoid storing intermediate values in
policy->min and policy->max with the help of the observation that
their new values are expected to be properly ordered upfront.

Also modify cpufreq_driver_resolve_freq() to take the possible reverse
ordering of policy->min and policy->max, which may happen depending on
the ordering of operations when this function and cpufreq_set_policy()
run concurrently, into account by always honoring the max when it
turns out to be less than the min (in case it comes from thermal
throttling or similar).

Fixes: 151717690694 ("cpufreq: Make policy min/max hard requirements")
Cc: 5.16+ <stable@vger.kernel.org> # 5.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/5907080.DvuYhMxLoT@rjwysocki.net
 2025-04-17 17:54:51 +02:00
Johan Hovold
a374f28700 cpufreq: fix compile-test defaults 
Commit 3f66425a4fc8 ("cpufreq: Enable COMPILE_TEST on Arm drivers")
enabled compile testing of most Arm CPUFreq drivers but left the
existing default values unchanged so that many drivers are enabled by
default whenever COMPILE_TEST is selected.

This specifically results in the S3C64XX CPUFreq driver being enabled
and initialised during boot of non-S3C64XX platforms with the following
error logged:

	cpufreq: Unable to obtain ARMCLK: -2

Commit d4f610a9bafd ("cpufreq: Do not enable by default during compile
testing") recently fixed most of the default values, but two entries
were missed and two could use a more specific default condition.

Fix the default values for drivers that can be compile tested and that
should be enabled by default when not compile testing.

Fixes: 3f66425a4fc8 ("cpufreq: Enable COMPILE_TEST on Arm drivers")
Cc: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
 2025-04-17 13:36:29 +05:30
K Prateek Nayak
8157fbc907 cpufreq/amd-pstate: Update asym_prefer_cpu when core rankings change 
A subset of AMD systems supporting Preferred Core rankings can have
their rankings changed dynamically at runtime. Update the
"sg->asym_prefer_cpu" across the local hierarchy of CPU when the
preferred core ranking changes.

Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20250409053446.23367-4-kprateek.nayak@amd.com
 2025-04-16 21:09:11 +02:00