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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI support updates from Rafael Wysocki:
"These update documentation to reflect recent changes in the upstream
ACPICA project, fix issues in the core ACPI device enumeration code
(one of which has been introduced recently), improve the primary
"physical" device lookup for ACPI device objects in that code, and
update ACPI device drivers:
- Update MAINTAINERS, CREDITS and ACPI subsystem documentation to
reflect recent changes in the upstream ACPICA project (Rafael
Wysocki)
- Prevent the core ACPI enumeration code from combining device
resources that overlap completely in order to avoid resource
conflicts during platform device registration because there are
drivers that expect such resources to be present (Rafael Wysocki)
- Defer device power initialization during ACPI-based device
enumeration to the point when the given device is known to be
present and functional and all of its dependencies have been met
(Peixin Xie)
- Fix bus ID cleanup on device_add() failures during ACPI device
object registration (Hongyan Xu)
- Introduce a new helper function for looking up the primary
"physical" device for a given ACPI device object and update the
core ACPI device enumeration code to use that function (Rafael
Wysocki)
- Protect all battery properties with a separated mutex in the ACPI
battery driver to prevent race conditions from occurring and avoid
evaluating the _BST ACPI control method multiple times in parallel
for the same battery device (Rong Zhang)
- Add DMI quirk for the Razer Blade Pro 17 early 2020 lid switch to
the ACPI button driver (Robin Everaars)
- Convert fixed clock rates in the ACPI driver for AMD SoCs (APD) to
use HZ_PER_MHZ and add a clock frequency for the HJMC01 I2C
controller to it (Hongnan Li and Xiangyang Yu)
- Fix a stack buffer overflow in query_capability() in the ACPI
platform firmware runtime update driver (Anirudh Prasad)"
* tag 'acpi-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: button: Add DMI quirk for Razer Blade Pro 17 early 2020 lid switch
ACPI: scan: Do not combine resources that overlap completely
ACPI: Update upstream ACPICA repository URL in documentation
ACPI: Update MAINTAINERS entry for ACPICA
ACPI: Add Bob Moore to CREDITS
ACPI: pfr_update: fix stack buffer overflow in query_capability()
ACPI: scan: Defer device power initialization
ACPI: APD: Add clock frequency for HJMC01 I2C controller
ACPI: APD: Convert fixed clock rates to use HZ_PER_MHZ
ACPI: scan: Use acpi_bus_get_primary_device()
ACPI: platform: Use acpi_bus_get_primary_device()
ACPI: bus: Introduce acpi_bus_get_primary_device()
ACPI: scan: fix bus ID cleanup on device_add() failures
ACPI: battery: Protect all properties with a separated mutex
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Merge changes related to primary "physical" device lookup for a given
ACPI device object that include the introduction of a new lookup helper
function and core ACPI device enumeration code updates putting that new
function to use (Rafael Wysocki)
* acpi-bus:
ACPI: scan: Use acpi_bus_get_primary_device()
ACPI: platform: Use acpi_bus_get_primary_device()
ACPI: bus: Introduce acpi_bus_get_primary_device()
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git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core updates from Danilo Krummrich:
"container_of:
- Apply typeof_member(), remove the local __mptr variable to
eliminate variable shadowing warnings on nested container_of()
calls, and remove unnecessary parentheses
core:
- Add driver name to probe debug print for initcall_debug
- Avoid repeatedly printing the same 'Fixed dependency cycle' log
- Unwind device_add() on attribute creation failure in
attribute_container_add_class_device()
- Remove statistics group if encryption group creation fails in
transport_add_class_device()
debugfs:
- Fix lockdown check for mmap_prepare()
- Warn if file creation failed due to uninitialized debugfs
device property:
- Implement fw_devlink support for software nodes by adding
software_node_add_links(), which creates fwnode links from
DEV_PROP_REF properties to enable automatic probe ordering. Add
kunit-managed fwnode helpers and test coverage
- Fix infinite loop in fwnode_for_each_child_node() when the
secondary fwnode has more than one child. Add test cases
- Fix out-of-bounds access in software_node_get_reference_args() when
called with index -1 (UINT_MAX)
- Refactor to use RAII approach with __free()
- Add Bartosz Golaszewski as software node reviewer
firmware loader:
- Fix race where a sysfs fallback request can complete before being
queued as pending, leading to a use-after-free on the next fallback
request
- Reject 0-size built-in firmware and fail the build on empty
firmware files in CONFIG_EXTRA_FIRMWARE
kobject:
- Provide __KOBJ_ATTR() and __KOBJ_ATTR_RO/WO() initialization macros
and allow the constification of kobject attributes, enabling them
to reside in read-only memory
platform:
- Provide platform_device_set_of_node(), platform_device_set_fwnode(),
and platform_device_set_of_node_from_dev() helpers that encapsulate
firmware node reference counting for dynamically allocated platform
devices
Convert all in-tree users that manually assigned dev.of_node or
dev.fwnode, fixing a pre-existing refcount bug in powermac. Switch
to counting references of all firmware node types, not only OF
nodes
- Unify the release path for dynamically allocated platform devices
by removing platform_device_release_full(). Amend the fwnode setter
API contract to warn if a primary software node is overwritten. Add
KUnit tests for correct software node removal on device
unregistration
Rust:
- Auxiliary:
- Add registration_data_with() closure-based API for invariant
ForLt types
- Debugfs:
- Migrate BinaryWriter and BinaryReaderMut trait requirements
from kernel::transmute traits to zerocopy traits
- Device:
- Add BoundInternal device context and InternalBoundContext trait
for bus abstractions that need internal access to a bound
device.
- Make the lifetime on Core and CoreInternal invariant to prevent
coercion to shorter lifetimes
- Devres:
- Fix race between concurrent revokers where the losing revoker
could return before the winning revoker finished dropping the
inner data, causing use-after-free.
- Ensure revocation is complete before the device finishes
unbinding by making the synchronization bidirectional.
- Add DevresLt<F: ForLt>, a wrapper around Devres that shortens
'static back to the caller's borrow scope. Implement ForLt and
CovariantForLt for Bar, IoMem, and ExclusiveIoMem
- Driver:
- Switch from index-based to pointer-based device ID info lookup,
storing static references in driver_data. Centralize device ID
handling in device_id.rs, removing the open-coded ACPI/OF
matching logic and duplicate ID table from driver.rs
- I/O:
- Make I/O regions typed (with a dynamically-sized Region type
for the existing untyped case), create view types representing
subregions of a mapped I/O region, and add io_project!() for
safely creating subviews.
- Split Io into a base trait (IoBase) and an extension trait (Io)
with a blanket implementation, preventing implementers from
overriding provided methods that unsafe code relies on.
- Add a SysMem backend for shared system memory with volatile
access, and make Coherent implement Io via an I/O view type.
Add IoSysMap as sum type of Mmio and SysMem. Add copying
methods (memcpy_{from,to}io()) and read_val()/write_val() for
typed access.
- Replace dma_read!()/dma_write!() with io_read!()/io_write!()
for primitives and copying methods for aggregates; drop the old
macros. Convert nova-core to use I/O projection.
- Fix internal shortcut rule dispatch in the register!() macro,
remove unused rule arguments, and use path fragments for alias
destinations
- IRQ:
- Make irq::Registration compatible with lifetime-bound drivers
by removing the 'static bound on Handler/ThreadedHandler and
replacing Devres<RegistrationInner> with direct
request_irq()/free_irq() calls. Handlers can now directly own
lifetime-bound device resources
- PCI:
- Convert IrqVectorRegistration to a lifetime-annotated owning
type, giving drivers explicit control over the allocation
lifetime. IrqVector embeds a resolved IrqRequest, making the
conversion infallible. Remove the redundant
request_irq()/request_threaded_irq() wrappers from pci::Device.
- Add pci_irq_type() C helper and expose it via irq_type() on
IrqVectorRegistration and IrqVector, returning PCI_IRQ_MSIX,
PCI_IRQ_MSI, or PCI_IRQ_INTX.
- Mark pci::Device refcount methods inline
- Serdev:
- Add Rust abstractions for the serial device bus, including
serdev::Driver trait, serdev::Device wrapping struct
serdev_device, and serdev::Adapter implementing
RegistrationOps. Includes a sample driver. Markus Probst takes
over as serdev maintainer for both C and Rust code
- Misc:
- Split ForLt into a base trait (providing the Of<'a> GAT) and an
unsafe CovariantForLt subtrait guaranteeing covariance,
enabling invariant types (e.g. those containing Mutex<&'bound T>)
to participate in the ForLt abstraction.
- Fix Coherent read past EOF returning -ERANGE instead of zero.
- Fix firmware example UB by avoiding null-pointer ARef
misc:
- Avoid iattr allocation in kernfs listxattr by using
kernfs_iattrs_noalloc().
- Unregister SoC bus on early device registration failure.
- Remove unused DMA_FENCE_TRACE Kconfig symbol.
- Fix /sys/module path in comment.
- Refactor ISA bus init to remove nested blocks.
- Remove redundant nodemask clears in numa_init().
- Add kernel-doc for fwnode_operations and sys_soc.h, mark
internal property data as private for kernel-doc, and add
property.h/fwnode.h to driver-api infrastructure docs.
- Add MAINTAINERS entry for sys_soc.h"
* tag 'driver-core-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (129 commits)
rust: pci: expose the allocated interrupt type
PCI: Add pci_irq_type() to query the allocated interrupt type
rust: pci: remove request_irq() and request_threaded_irq() from Device
rust: pci: resolve IRQ in index() and embed IrqRequest in IrqVector
rust: pci: convert IrqVectorRegistration to a lifetime-managed owning type
kernfs: avoid iattr allocation in listxattr
rust: serdev: use ThisModule::as_ptr() instead of field access
ACPI/IORT: use platform_device_set_fwnode()
ACPI/APMT: use platform_device_set_fwnode()
firmware_loader: do not queue completed sysfs fallback requests
rust: pci: Mark Device refcount methods inline
rust: irq: make Registration compatible with lifetime-bound drivers
rust: net/phy: remove expansion from doc
rust: dma: return zero for Coherent reads past EOF
rust: io: register: use path fragment for alias destination
rust: io: register: remove unused rule arguments
rust: io: register: dispatch shortcut rules internally
MAINTAINERS: add sys_soc.h to DRIVER CORE
rust: debugfs: remove unsafe blocks from traits impl for Vec
rust: debugfs: migrate debugfs traits requirements to zerocopy
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"There's a reasonable amount of stuff here, including a bunch of
updates to the perf PMU drivers and some MPAM updates to expose the
memory bandwidth counters via resctrl.
On the architecture side, some highlights include support for BBML3
and steps towards support for an architectural NMI solution, all
wrapped up in a web of fixes for latent issues identified by Sashiko.
ACPI:
- Combine reads of AMU counters into a single FFH feedback counter op
Confidential computing:
- Fix smp_processor_id() in preemptible context when retrieving an
attestation token inside a realm
- Convert pKVM over to a "CC platform"
- Clean-up our SWIOTLB configuration in preparation for reworking the
handling of encrypted/decryped DMA buffers in the dma-mapping tree
CPU errata handling:
- Work around broken device memory ordering on NVIDIA Olympus cores
- Fix broken 'nospectre_bhb' command-line option
- Select the idle loop backend instruction on the command-line
CPU features:
- Replace our BBML2-noabort feature with the new architectural BBML3
feature
- Disable in-kernel BTI for recent versions of Clang due to issues
with livepatch that are still being investigated
- Clean-up documentation describing which ID register fields are
exposed to userspace
Interrupts:
- Preliminary work towards supporting FEAT_NMI, which cleans up our
IRQ entry code and fixes some latent issues with pseudo-NMI
- Support for an SDEI backend to trigger an NMI backtrace
Memory management:
- Treat all devices as coherent when CLIDR_EL1.LoC == 0
- Fix no-map handling of sub-page-sized regions
- Second attempt at unmapping the linear aliases of the kernel data
and bss sections
- Fix EFI runtime calls when software-PAN is enabled
Miscellaneous:
- Add Mark Rutland as a reviewer!
- Tidy-up our futex cmpxchg logic when using the new LSUI
instructions
- Drop the requirement on DYNAMIC_FTRACE_WITH_CALL_OPS when
selecting HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
- Fix a false-positive KCSCAN splat in the delay loop
- Use a portable typedef for 128-bit scalar types in our UAPI headers
- Non-critical fixes for Sashiko reports all over
MPAM:
- Hook MPAM memory bandwidth counters into resctrl's counter
assignment interface
- Fix a quirk in the MPAM bandwidth counting on Nvidia T241 so that
it also applies to 63 bit counters
Perf:
- Workarounds for hardware issues in the CMN-S3 PMU (Graviton 5) and
CPU PMU (NVIDIA Olympus again!)
- Add support for the DDR PMU on Marvell CN20K SoCs
- Add support for Picoheart implementations of the DCW PCIe PMU
- Add support for Channel/Rank/Bank filtering in the CXL PMU driver
- Add support for 64-bit counters in the CSPMU device
- Add support for revision 2 of the CMN S3 PMU
Ptrace:
- Fix a decade-old bug in our handling of seccomp and tracing on
syscall entry
- Fix regset handling for inactive SVE and SSVE registers
Selftests
- Add some tests for the decade-old bug that we just tried to fix in
our syscall entry path
- Fix SVE test crash on SME-only CPUs"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (95 commits)
arm64/efi: Avoid voluntary preemption with efi_mm installed
arm64: bti: Disable in-kernel BTI with recent versions of Clang
arm64: entry: Avoid unnecessary local_irq_disable() on kernel exit
irqchip/gic-v3: make the unmasking of pseudo-NMIs explicit when handling IRQs
arm64: Disable KCSAN instrumentation in delay.o
arm_mpam: Disable driver unbind to avoid UAF
arm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt
perf: arm_pmuv3: Zero initialize hw_id branch stack field
arm64: mm: Unmap kernel data/bss entirely from the linear map
iommu/arm-smmu-v3-sva: Use system_supports_bbml3() to detect CPU feature
perf/arm-cmn: Support CMN S3 r2
perf/arm-cmn: Plumb in new filter types
perf/arm-cmn: Refactor event filter data
perf/arm-cmn: Refactor event filter programming
perf/arm-cmn: Rename filter variables for clarity
arm64: mm: fix accidental linear mapping of no-map reserved memory
tools: Ensure tools copy of linux/filter.h exports the UAPI
kselftest/arm64: Fix abi test compilation errors
arch: arm64: add early_param idle=<wfi|yield|nop>
arm64: entry: mask DAIF before returning from C EL1 handlers
...
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The function used for obtaining the first "physical" device for which
the given ACPI one is the ACPI companion, acpi_get_first_physical_node(),
may return a stale device pointer (mostly in theory) because
acpi_unbind_one() may run as a whole after dropping the ACPI device's
physical_node_lock in acpi_get_first_physical_node() and before it
returns. The last reference to the "physical" device may be dropped
then before the pointer to it is returned to the caller.
If that happens and the acpi_get_first_physical_node() caller invokes
get_device() on the pointer obtained from it, which is done by the
majority of its callers, a use-after-free will occur.
To prepare for addressing this problem, introduce a new function for
getting the first "physical" device associated with the given ACPI one
(the "primary physical device") that will also reference count the
device in question before returning a pointer to it.
Make that new function and acpi_get_first_physical_node() share the
physical node list lookup code.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/2843318.mvXUDI8C0e@rafael.j.wysocki
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Merge an ACPI device enumeration core code update, ACPI support updates
related to PCI, an ACPI Time and Alarm Device (TAD) driver update and
ACPI APEI updates for 7.3-rc1:
- Avoid registering platform devices with resource overlaps in the ACPI
core device enumeration code (Rafael Wysocki)
- Clear driver_data on all paths that free acpi_pci_root in
acpi_pci_root_add() (Chen Pei)
- Simplify acpi_get_pci_dev() with the help of a mutex guard, introduce
acpi_dev_get_pci_dev() for code that has a struct ACPI device for
which it wants to get the struct pci_dev pointer of the associated
PCI device, and use it in the ACPI video bus driver (Rafael Wysocki)
- Avoid printing confusing _OSC messages for non-PCIe host bridges
without _OSC which is a valid configuration (Kazuma Kondo)
- Add locking around evaluation of ACPI control methods in the ACPI TAD
driver to avoid race conditions (Rafael Wysocki)
- Handle repeated SEA error storms in APEI (Junhao He)
- Fix ERST timeout unit conversion in APEI (Nirmoy Das)
- Fix ARM section length accounting after header in the ACPI APEI GHES
driver (TanZheng)
- Mark ghes_in_nmi_spool_from_list() as maybe unused (Rui Qi)
* acpi-scan:
ACPI: scan: Avoid registering platform devices with resource overlaps
* acpi-pci:
ACPI: PCI: Avoid misleading _OSC messages for non-PCIe host bridges without _OSC
ACPI: video: Use acpi_dev_get_pci_dev() instead of acpi_get_pci_dev()
ACPI: video: Drop backlight parent device reference later
ACPI: PCI: Introduce acpi_dev_get_pci_dev()
ACPI: PCI: Use a mutex guard to simplify acpi_get_pci_dev()
ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root
* acpi-tad:
ACPI: TAD: Add locking around AML evaluations
* acpi-apei:
ACPI: APEI: Handle repeated SEA error storms
ACPI: APEI: Fix ERST timeout unit conversion
ACPI: APEI: GHES: fix ARM section length accounting after header
ACPI: APEI: GHES: Mark ghes_in_nmi_spool_from_list() as maybe unused
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We need the driver-core fixes in here as well to build on top of.
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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Merge ACPI bus type code updates, ACPI sysfs code updates related to
exposing table data, updates of ACPI data-only table parsers and
assorted driver changes related to ACPI support for 7.3-rc1:
- Eliminate struct acpi_driver whose users have all been converted to
bind to platform devices or auxiliary devices and set the "no power
management" flag for all struct acpi_device objects (Rafael Wysocki)
- Update kerneldoc comments of two structures in the ACPI bus type code
to use correct struct member names to avoid warnings (Randy Dunlap)
- Avoid complaints regarding missing _OSC features on platforms where
OSC_CAPABILITIES_MASK_ERROR is set in _OSC error bits even though all
of the requested features are actually acknowledged (Rafael Wysocki)
- Use correct region struct for BERT region size check and properly
map BERT and CCEL data to their ACPI tables (Thomas Renninger)
- Clean up the list of included header files in the NHLT table parser
and validate the table and record lengths in the FPDT parser (Andy
Shevchenko and Pengpeng Hou)
- Stop using acpi_device_name() in the PNP core, stop setting
acpi_device_name/class() in the Xen variant of the ACPI PAD
(Processor Aggregator Device) driver, and make the Loongarch
laptop driver stop setting acpi_device_class() (Rafael Wysocki)
* acpi-bus:
ACPI: bus: Avoid confusing complaints regarding missing _OSC features
ACPI: bus: Use correct struct member names
ACPI: scan: Set power.no_pm for all struct acpi_device objects
ACPI: bus: Eliminate struct acpi_driver
* acpi-sysfs:
ACPI: sysfs: Properly map BERT and CCEL data to their ACPI tables
ACPI: Use correct region struct for BERT region size check
* acpi-tables:
ACPI: NHLT: Remove always included kconfig.h
ACPI: FPDT: validate table and record lengths
* acpi-driver:
PNP: ACPI: Stop using acpi_device_name()
ACPI: PAD: xen: Stop setting acpi_device_name/class()
platform/loongarch: laptop: Stop setting acpi_device_class()
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cpc_write() serializes every SystemMemory write with the per-CPU
rmw_lock. The lock is required for read-modify-write fields and for
registers whose access units overlap, but not for a full-width register
in a standalone access unit.
The _CPC layout is immutable after it has been parsed. Classify each
SystemMemory register at probe time and retain locking for partial
fields, invalid access widths, and overlapping access units. Allow
standalone full-width registers to bypass the descriptor lookup and
spinlock.
Store the classification in existing structure padding so that struct
cpc_register_resource does not grow.
Signed-off-by: Christian Loehle <christian.loehle@arm.com>
Link: https://patch.msgid.link/20260803210527.1285229-3-christian.loehle@arm.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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With device ID info now including pointers instead of indices, the
open-coded ACPI/OF matching is no longer needed and can be replaced with
`device_get_match_data`.
With the removal of open-coded matching, the exposed functions and helpers
are also removed; this effectively reverts most of commit 2690d071584e
("rust: ACPI: fix missing match data for PRP0001").
Signed-off-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/20260629-id_info-v2-9-56fccbe9c5ef@garyguo.net
[ Consider the serdev code merged in the meantime. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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cppc_get_perf_ctrs() reads the delivered and reference performance
counters one at a time.
Allow architectures to provide both FFH feedback counters in one
operation when that either narrows the sampling window or avoids extra
cross-CPU reads. Add a small FFH-specific hook for that case and fall
back to the existing per-register reads when unsupported.
Tested-by: Sumit Gupta <sumitg@nvidia.com>
Reviewed-by: Sumit Gupta <sumitg@nvidia.com>
Tested-by: Vanshidhar Konda <vanshikonda@os.amperecomputing.com>
Reviewed-by: Vanshidhar Konda <vanshikonda@os.amperecomputing.com>
Signed-off-by: Pengjie Zhang <zhangpengjie2@huawei.com>
Acked-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Tested-by: Jeremy Linton <jeremy.linton@arm.com>
Reviewed-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
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ACPI 6.2, Section 6.2.11.2 permits _CPC registers to use flexible
address spaces. Linux advertises that capability through _OSC and parses
the address space of each _CPC register independently. A directly
accessible DESIRED_PERF combined with PCC-backed limits is therefore a
valid configuration.
cppc_allow_fast_switch() only checks DESIRED_PERF, although the fast-switch
callback passes DESIRED_PERF, MIN_PERF and MAX_PERF to cppc_set_perf(). If
a limit uses PCC, that function can sleep while called from scheduler
context.
Allow fast switching only when every supported control used by the
callback has an address space already accepted for fast access. Check the
complete policy domain, including initialized CPUs that are currently
offline and may later become the policy's managing CPU.
Fixes: 658fa7b1c47a ("ACPI: CPPC: Add cppc_get_perf() API to read performance controls")
Cc: stable@vger.kernel.org
Signed-off-by: Christian Loehle <christian.loehle@arm.com>
Link: https://patch.msgid.link/20260722093825.1030594-2-christian.loehle@arm.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Avoid kernel-doc warnings by using the correct struct member names:
Warning: ./include/acpi/acpi_bus.h:429 struct member 'crs_csi2_local' not described in 'acpi_device_software_node_port'
Warning: ./include/acpi/acpi_bus.h:429 Excess struct member 'crs_crs2_local' description in 'acpi_device_software_node_port'
Warning: ./include/acpi/acpi_bus.h:445 struct member 'nodeptrs' not described in 'acpi_device_software_nodes'
Warning: ./include/acpi/acpi_bus.h:445 Excess struct member 'nodeprts' description in 'acpi_device_software_nodes'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://patch.msgid.link/20260720032341.3087008-2-rdunlap@infradead.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The inclusion of <linux/kconfig.h> is unneeded as it's guaranteed by
the build starting from the commit 2a11c8ea20bf ("kconfig: Introduce
IS_ENABLED(), IS_BUILTIN() and IS_MODULE()"). Remove it here.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20260717171635.1783543-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Some acpi_get_pci_dev() callers already have a struct ACPI device for
which they want to get the struct pci_dev pointer of the associated
PCI device, so they don't need to look for one.
For this reason, add acpi_dev_get_pci_dev() that will get a PCI device
for a given ACPI one (if possible) and turn acpi_get_pci_dev() into
a static inline helper passing the acpi_fetch_acpi_dev() return value
directly to acpi_dev_get_pci_dev().
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/3430928.44csPzL39Z@rafael.j.wysocki
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Now that struct acpi_driver has no more users, eliminate it along with
all of the code related to it.
Also remove the file added by commit b8c8a8ea18ad ("ACPI: Documentation:
driver-api: Disapprove of using ACPI drivers") because it will not be
necessary any more after eliminating struct acpi_driver from the code.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/5132944.31r3eYUQgx@rafael.j.wysocki
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Commit 292db66afd20 ("ACPICA: Unbreak tools build after switching over
to strscpy_pad()") added an #ifdef based on a __KERNEL__ check which is
sort of nasty to the acpi_ut_safe_strncpy() definition to unbreak ACPICA
tools builds broken by commit 97f7d3f9c9ac ("ACPICA: Replace strncpy()
with strscpy_pad() in acpi_ut_safe_strncpy()"). However, that #ifdef
effectively produces dead code when tools are built because they don't
call acpi_ut_safe_strncpy().
Accordingly, drop the existing definition of acpi_ut_safe_strncpy() and
define it as a strscpy_pad() alias.
Fixes: 292db66afd20 ("ACPICA: Unbreak tools build after switching over to strscpy_pad()")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[ rjw: Tweak the changelog ]
Link: https://patch.msgid.link/12941764.O9o76ZdvQC@rafael.j.wysocki
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core updates from Danilo Krummrich:
"Deferred probe:
- Fix race where deferred probe timeout work could be permanently
canceled by using mod_delayed_work()
- Fix missing jiffies conversion in deferred_probe_extend_timeout()
- Guard timeout extension with delayed_work_pending() to prevent
premature firing
- Use system_percpu_wq instead of the deprecated system_wq
- Update deferred_probe_timeout documentation
device:
- Replace direct struct device bitfield access (can_match, dma_iommu,
dma_skip_sync, dma_ops_bypass, state_synced, dma_coherent,
of_node_reused, offline, offline_disabled) with flag-based
accessors using bit operations
- Reject devices with unregistered buses
- Delete unused DEVICE_ATTR_PREALLOC()
- Add low-level device attribute macros with const show/store
callbacks, allowing device attributes to reside in read-only memory
- Move core device attributes to read-only memory
- Constify group array pointers in driver_add_groups() /
driver_remove_groups(), struct bus_type, and struct device_driver
device property:
- Fix fwnode reference leak in fwnode_graph_get_endpoint_by_id()
- Initialize all fields of fwnode_handle in fwnode_init()
- Provide swnode_get()/swnode_put() wrappers around kobject_get/put()
- Allow passing struct software_node_ref_args pointers directly to
PROPERTY_ENTRY_REF()
driver_override:
- Migrate amba, cdx, vmbus, and rpmsg to the generic driver_override
infrastructure, fixing a UAF from unsynchronized access to
driver_override in bus match() callbacks
- Remove the now-unused driver_set_override()
firmware loader:
- Fix recursive lock deadlock in device_cache_fw_images() when async
work falls back to synchronous execution
- Fix device reference leak in firmware_upload_register()
platform:
- Pass KBUILD_MODNAME through the platform driver registration macro
to create module symlinks in sysfs for built-in drivers; move
module_kset initialization to a pure_initcall and tegra cbb
registration to core_initcall to ensure correct ordering
- Pass THIS_MODULE implicitly through a coresight_init_driver() macro
sysfs:
- Upgrade OOB write detection in sysfs_kf_seq_show() from printk to
WARN
- Add return value clamping to sysfs_kf_read()
Rust:
- ACPI:
Fix missing match data for PRP0001 by exporting
acpi_of_match_device()
- Auxiliary:
Replace drvdata() with dedicated registration data on
auxiliary_device. drvdata() exposed the driver's bus device private
data beyond the driver's own scope, creating ordering constraints
and forcing the data to outlive all registrations that access it.
Registration data is instead scoped structurally to the
Registration object, making lifecycle ordering enforced by
construction rather than convention.
- Rust-native device driver lifetimes (HRT):
Allow Rust device drivers to carry a lifetime parameter on their
bus device private data, tied to the device binding scope -- the
interval during which a bus device is bound to a driver. Device
resources like pci::Bar<'a> and IoMem<'a> can be stored directly in
the driver's bus device private data with a lifetime bounded by the
binding scope, so the compiler enforces at build time that they do
not outlive the binding. This removes Devres indirection from every
access site and eliminates try_access() failure paths in
destructors.
Bus driver traits use a Generic Associated Type (GAT) Data<'bound>
to introduce the lifetime on the private data, rather than
parameterizing the Driver trait itself. Auxiliary registration
data, where the lifetime is not introduced by a trait callback but
must be threaded through Registration, uses the ForLt trait (a
type-level abstraction for types generic over a lifetime).
Misc:
- Fix DT overlayed devices not probing by reverting the broken
treewide overlay fix and re-running fw_devlink consumer pickup when
an overlay is applied to a bound device
- Use root_device_register() for faux bus root device; add sanity
check for failed bus init
- Fix dev_has_sync_state() data race with READ_ONCE() and move it to
base.h
- Avoid spurious device_links warning when removing a device while
its supplier is unbinding
- Switch ISA bus to dynamic root device
- Fix suspicious RCU usage in kernfs_put()
- Remove devcoredump exit callback
- Constify devfreq_event_class"
* tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core: (81 commits)
software node: allow passing reference args to PROPERTY_ENTRY_REF()
driver core: platform: set mod_name in driver registration
coresight: pass THIS_MODULE implicitly through a macro
kernel: param: initialize module_kset in a pure_initcall
soc/tegra: cbb: Move driver registration from pure_initcall to core_initcall
firmware_loader: Fix recursive lock in device_cache_fw_images()
driver core: Use system_percpu_wq instead of system_wq
driver core: remove driver_set_override()
rpmsg: use generic driver_override infrastructure
Drivers: hv: vmbus: use generic driver_override infrastructure
cdx: use generic driver_override infrastructure
amba: use generic driver_override infrastructure
rust: devres: add 'static bound to Devres<T>
samples: rust: rust_driver_auxiliary: showcase lifetime-bound registration data
rust: auxiliary: generalize Registration over ForLt
rust: types: add `ForLt` trait for higher-ranked lifetime support
gpu: nova-core: separate driver type from driver data
samples: rust: rust_driver_pci: use HRT lifetime for Bar
rust: io: make IoMem and ExclusiveIoMem lifetime-parameterized
rust: pci: make Bar lifetime-parameterized
...
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Merge an ACPI processor driver update, two ACPI CPPC library updates
and ACPI PCI/CXL support updates for 7.2-rc1:
- Add cpuidle driver check in acpi_processor_register_idle_driver() to
avoid evaluating _CST unnecessarily (Tony W Wang-oc)
- Suppress UBSAN warning caused by field misuse during PCC-based
register access in the ACPI CPPC library (Jeremy Linton)
- Add support for CPPC v4 to the ACPI CPPC library (Sumit Gupta)
- Update the ACPI device enumeration code to honor _DEP for ACPI0016
PCI/CXL host bridges and make the ACPI PCI root driver clear _DEP
dependencies for PCI roots that have become operational (Chen Pei)
* acpi-processor:
ACPI: processor: Add cpuidle driver check in acpi_processor_register_idle_driver()
* acpi-cppc:
ACPI: CPPC: Suppress UBSAN warning caused by field misuse
ACPI: CPPC: Add support for CPPC v4
* acpi-pci:
ACPI: scan: Honor _DEP for ACPI0016 PCI/CXL host bridge
ACPI: PCI: Clear _DEP dependencies after PCI root bridge attach
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Merge updates of core ACPI device drivers for 7.2-rc1:
- Fix multiple issues related to probe, removal and missing NVDIMM
device notifications in the ACPI NFIT driver (Rafael Wysocki)
- Add support for devres-based management of ACPI notify handlers to
the ACPI core (Rafael Wysocki)
- Switch multiple core ACPI device drivers (including the ACPI PAD,
ACPI video bus, ACPI HED, ACPI thermal zone, ACPI AC, ACPI battery,
and ACPI NFIT drivers) over to using devres-based resource management
during probe (Rafael Wysocki)
- Replace mutex_lock/unlock() with guard()/scoped_guard() in the ACPI
PMIC driver (Maxwell Doose)
- Fix message kref handling in the dead device path of the ACPI IPMI
address space handler (Yuho Choi)
- Use sysfs_emit() in idlecpus_show() in the ACPI processor aggregator
device (PAD) driver (Yury Norov)
- Clean up device_id_scheme initialization in the ACPI video bus driver
(Jean-Ralph Aviles)
* acpi-driver: (26 commits)
ACPI: IPMI: Fix message kref handling on dead device
ACPI: NFIT: core: Fix possible deadlock and missing notifications
ACPI: NFIT: core: Eliminate redundant local variable
ACPI: NFIT: core: Fix acpi_nfit_init() error cleanup
ACPI: NFIT: core: Fix possible NULL pointer dereference
ACPI: bus: Clean up devm_acpi_install_notify_handler()
ACPI: PAD: Use sysfs_emit() in idlecpus_show()
ACPI: video: Do not initialise device_id_scheme directly
ACPI: video: Switch over to devres-based resource management
ACPI: video: Use devm for video->entry and backlight cleanup
ACPI: video: Use devm action for freeing video devices
ACPI: video: Use devm action for video bus object cleanup
ACPI: video: Rearrange probe and remove code
ACPI: video: Reduce the number of auxiliary device dereferences
ACPI: PAD: Switch over to devres-based resource management
ACPI: PAD: Fix teardown ordering in acpi_pad_remove()
ACPI: PAD: Pass struct device pointer to acpi_pad_notify()
ACPI: PAD: Rearrange acpi_pad_notify()
ACPI: thermal: Switch over to devres-based resource management
ACPI: HED: Switch over to devres-based resource management
...
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Merge ACPICA updates for 7.2-rc1 including the following changes:
- Add support for the Legacy Virtual Register (LVR) field in I2C serial
bus resource descriptors to ACPICA (Akhil R)
- Fix multiple issues related to bounds checks, input validation,
use-after-free, and integer overflow checks in the AML interpreter
in ACPICA (ikaros)
- Update the copyright year to 2026 in ACPICA files and make minor
changes related to ACPI 6.6 support (Pawel Chmielewski)
- Remove spurious precision from format used to dump parse trees in
ACPICA (David Laight)
- Add modern standby DSM GUIDs to ACPICA header files (Daniel Schaefer)
- Fix FADT 32/64X length mismatch warning in ACPICA (Abdelkader Boudih)
- Update D3hot/cold device power states definitions in ACPICA header
files (Aymeric Wibo)
- Fix NULL pointer dereference in acpi_ns_custom_package() (Weiming
Shi)
- Update ACPICA version to 20260408 (Saket Dumbre)
* acpica: (27 commits)
ACPICA: add boundary checks in two places
ACPICA: Add package limit checks in parser functions
ACPICA: Update version to 20260408
ACPICA: Update the copyright year to 2026
ACPICA: Remove spurious precision from format used to dump parse trees
ACPICA: Enhance OEM ID and Table ID validation in acpi_ex_load_table_op()
ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()
ACPICA: Enhance buffer validation in acpi_ut_walk_aml_resources()
ACPICA: Add validation for node in acpi_ns_build_normalized_path()
ACPICA: validate handler object type in two places
ACPICA: Improve argument parsing in acpi_ps_get_next_simple_arg()
ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
ACPICA: Prevent adding invalid references
ACPICA: add boundary checks in acpi_ps_get_next_field()
ACPICA: validate byte_count in acpi_ps_get_next_package_length()
ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
ACPICA: fix I2C LVR item count in the conversion table
ACPICA: Mention the LVR bits
ACPICA: Change LVR to 8 bit value
ACPICA: Fetch LVR I2C resource descriptor
...
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CPPC v4 (ACPI 6.6, Section 8.4.6) adds two optional entries to the
_CPC package:
1. OSPM Nominal Performance (8.4.6.1.2.6): A write-only register that
lets OSPM inform the platform what it considers nominal performance.
The platform classifies performance above this level as boost and
below as throttle for its power/thermal decisions.
2. Resource Priority (8.4.6.1.2.7): A Package of Resource Priority
Register Descriptor sub-packages that allow OSPM to set relative
priority among processors for shared resources (boost, throttle,
L2/L3 cache, memory bandwidth). Parsing the full structure is not
yet supported; such entries are marked as unsupported.
Add v4 _CPC table parsing (25 entries) and update REG_OPTIONAL to
mark the two new registers as optional.
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Link: https://patch.msgid.link/20260527194626.185286-2-sumitg@nvidia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Merge updates that introduce devm_acpi_install_notify_handler()
and convert some drivers for core ACPI devices previously using
acpi_dev_install_notify_handler() to devres-based resource
management.
* acpi-driver-devm:
ACPI: video: Switch over to devres-based resource management
ACPI: video: Use devm for video->entry and backlight cleanup
ACPI: video: Use devm action for freeing video devices
ACPI: video: Use devm action for video bus object cleanup
ACPI: video: Rearrange probe and remove code
ACPI: video: Reduce the number of auxiliary device dereferences
ACPI: PAD: Switch over to devres-based resource management
ACPI: PAD: Fix teardown ordering in acpi_pad_remove()
ACPI: PAD: Pass struct device pointer to acpi_pad_notify()
ACPI: PAD: Rearrange acpi_pad_notify()
ACPI: thermal: Switch over to devres-based resource management
ACPI: HED: Switch over to devres-based resource management
ACPI: HED: Refine guarding against adding a second instance
ACPI: battery: Switch over to devres-based resource management
ACPI: AC: Switch over to devres-based resource management
ACPI: NFIT: core: Use devm_acpi_install_notify_handler()
ACPI: bus: Introduce devm_acpi_install_notify_handler()
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Update ACPI_CA_VERSION to match the 20260408 upstream release.
Link: https://github.com/acpica/acpica/commit/232ff3f8ae1a
Signed-off-by: Saket Dumbre <saket.dumbre@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/1881459.TLkxdtWsSY@rafael.j.wysocki
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Update copyright notices in all ACPICA files.
Link: https://github.com/acpica/acpica/commit/9def02549a9c
Signed-off-by: Pawel Chmielewski <pawel.chmielewski@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/4379132.1IzOArtZ34@rafael.j.wysocki
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Add a new field called lvr to struct acpi_resource_i2c_serialbus.
Link: https://github.com/acpica/acpica/commit/e62e74baf7e0
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2354060.iZASKD2KPV@rafael.j.wysocki
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Add AMD, Intel and Microsoft GUIDs for Low-power S0 Idle _DSM.
Link: https://uefi.org/sites/default/files/resources/Intel_ACPI_Low_Power_S0_Idle.pdf
Link: https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/modern-standby-firmware-notifications
Link: https://github.com/torvalds/linux/blob/v6.18/drivers/acpi/x86/s2idle.c
Link: https://github.com/acpica/acpica/commit/cae0082158e4
Signed-off-by: Daniel Schaefer <dhs@frame.work>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3415679.aeNJFYEL58@rafael.j.wysocki
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ACPI 6.6 introduces "Test" command for Multiprocessor Wakeup as well as
resetting the Multiprocessor Wakeup Mailbox
Link: https://github.com/acpica/acpica/commit/a4f629dc90fc
Signed-off-by: Pawel Chmielewski <pawel.chmielewski@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2414431.ElGaqSPkdT@rafael.j.wysocki
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And default `ACPI_STATE_D3` to D3cold.
Link: https://github.com/acpica/acpica/commit/c11cc9c68233
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/5105913.31r3eYUQgx@rafael.j.wysocki
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Introduce devm_acpi_install_notify_handler() for installing an ACPI
notify handler managed by devres that will be removed automatically on
driver detach.
It installs the notify handler on the device object in the ACPI
namespace that corresponds to the owner device's ACPI companion, if
present (an error is returned if the owner device doesn't have an ACPI
companion).
Currently, there is no way to manually remove the notify handler
installed by it because none of its users brought on subsequently
will need to do that.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[ rjw: Kerneldoc comment refinement ]
Link: https://patch.msgid.link/2268031.irdbgypaU6@rafael.j.wysocki
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Prior to commit 57c31e6d620f ("ACPI: scan: Use acpi_setup_gpe_for_wake()
for buttons"), ACPI button wakeup GPEs having handler methods remained
enabled after acpi_wakeup_gpe_init(), but currently they are not enabled
because acpi_setup_gpe_for_wake() disables them.
That causes function keys to stop working on some systems [1] and there
may be other related issues elsewhere.
To address that, make the ACPI button driver enable wakeup GPEs for ACPI
buttons so long as they have handler methods. While this does not
restore the old behavior exactly (the ACPI button driver needs to be
bound to the button devices for the GPEs to be enabled), it should be
sufficient to restore the missing functionality.
For this purpose, introduce acpi_enable_gpe_cond() that enables
a GPE if its dispatch type matches the supplied one and modify
acpi_button_probe() to use that function for enabling the GPEs in
question.
Fixes: 57c31e6d620f ("ACPI: scan: Use acpi_setup_gpe_for_wake() for buttons")
Reported-by: Nick <nick@kousu.ca>
Closes: https://lore.kernel.org/linux-acpi/E2OXET.4X5GTP37VTNC3@kousu.ca/ [1]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Nick <nick@kousu.ca>
Cc: 7.0+ <stable@vger.kernel.org> # 7.0+
Link: https://patch.msgid.link/9629117.CDJkKcVGEf@rafael.j.wysocki
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We need the driver-core fixes in here as well to build on top of.
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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Merge assorted ACPI support fixes for 7.1-rc2:
- Fix EINJV2 memory error injection in APEI (Tony Luck)
- Add missing notifier_block structure forward declaration to
acpi_bus.h (Bartosz Golaszewski)
- Fix related_cpus inconsistency during CPU hotplug in the ACPI CPPC
library (Jinjie Ruan)
- Add a quirk to force native backlight on HP OMEN 16 (8A44) in the
ACPI video bus driver (Shivam Kalra)
* acpi-apei:
ACPI: APEI: EINJ: Fix EINJV2 memory error injection
ACPICA: Provide #defines for EINJV2 error types
* acpi-bus:
ACPI: bus: add missing forward declaration to acpi_bus.h
* acpi-cppc:
ACPI: CPPC: Fix related_cpus inconsistency during CPU hotplug
* acpi-video:
ACPI: video: force native backlight on HP OMEN 16 (8A44)
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Export `acpi_of_match_device` function and use it to match the of device
table against ACPI PRP0001 in Rust.
This fixes id_info being None on ACPI PRP0001 devices.
Using `device_get_match_data` is not possible, because Rust stores an
index in the of device id instead of a data pointer. This was done this
way to provide a convenient and obvious API for drivers, which can be
evaluated in const context without the use of any unstable language
features.
Fixes: 7a718a1f26d1 ("rust: driver: implement `Adapter`")
Signed-off-by: Markus Probst <markus.probst@posteo.de>
Acked-by: Rafael J. Wysocki (Intel) <rafael@kernel.org> # ACPI
Link: https://patch.msgid.link/20260427-rust_acpi_prp0001-v6-1-6119b2a66183@posteo.de
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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The header references struct notifier_block but neither includes
linux/notifier.h nor contains the relevant forward declaration.
Add the latter for correctness.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
[ rjw: Subject tweak ]
Link: https://patch.msgid.link/20260427112238.132419-1-bartosz.golaszewski@oss.qualcomm.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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EINJV2 defined new error types by moving the severity (correctable,
uncorrectable non-fatal, uncorrectable fatal) out of the "type".
ACPI 6.5 introduced EINJV2 and defined a vendor defined error type
using bit 31. This was dropped in ACPI 6.6.
Link: https://github.com/acpica/acpica/commit/e82d2d2fd145
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://patch.msgid.link/20260421150216.11666-2-tony.luck@intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"Once again, cpufreq is the most active development area, mostly
because of the new feature additions and documentation updates in the
amd-pstate driver, but there are also changes in the cpufreq core
related to boost support and other assorted updates elsewhere.
Next up are power capping changes due to the major cleanup of the
Intel RAPL driver.
On the cpuidle front, a new C-states table for Intel Panther Lake is
added to the intel_idle driver, the stopped tick handling in the menu
and teo governors is updated, and there are a couple of cleanups.
Apart from the above, support for Tegra114 is added to devfreq and
there are assorted cleanups of that code, there are also two updates
of the operating performance points (OPP) library, two minor updates
related to hibernation, and cpupower utility man pages updates and
cleanups.
Specifics:
- Update qcom-hw DT bindings to include Eliza hardware (Abel Vesa)
- Update cpufreq-dt-platdev blocklist (Faruque Ansari)
- Minor updates to driver and dt-bindings for Tegra (Thierry Reding,
Rosen Penev)
- Add MAINTAINERS entry for CPPC driver (Viresh Kumar)
- Add support for new features: CPPC performance priority, Dynamic
EPP, Raw EPP, and new unit tests for them to amd-pstate (Gautham
Shenoy, Mario Limonciello)
- Fix sysfs files being present when HW missing and broken/outdated
documentation in the amd-pstate driver (Ninad Naik, Gautham Shenoy)
- Pass the policy to cpufreq_driver->adjust_perf() to avoid using
cpufreq_cpu_get() in the .adjust_perf() callback in amd-pstate
which leads to a scheduling-while-atomic bug (K Prateek Nayak)
- Clean up dead code in Kconfig for cpufreq (Julian Braha)
- Remove max_freq_req update for pre-existing cpufreq policy and add
a boost_freq_req QoS request to save the boost constraint instead
of overwriting the last scaling_max_freq constraint (Pierre
Gondois)
- Embed cpufreq QoS freq_req objects in cpufreq policy so they all
are allocated in one go along with the policy to simplify lifetime
rules and avoid error handling issues (Viresh Kumar)
- Use DMI max speed when CPPC is unavailable in the acpi-cpufreq
scaling driver (Henry Tseng)
- Switch policy_is_shared() in cpufreq to using cpumask_nth() instead
of cpumask_weight() because the former is more efficient (Yury
Norov)
- Use sysfs_emit() in sysfs show functions for cpufreq governor
attributes (Thorsten Blum)
- Update intel_pstate to stop returning an error when "off" is
written to its status sysfs attribute while the driver is already
off (Fabio De Francesco)
- Include current frequency in the debug message printed by
__cpufreq_driver_target() (Pengjie Zhang)
- Refine stopped tick handling in the menu cpuidle governor and
rearrange stopped tick handling in the teo cpuidle governor (Rafael
Wysocki)
- Add Panther Lake C-states table to the intel_idle driver (Artem
Bityutskiy)
- Clean up dead dependencies on CPU_IDLE in Kconfig (Julian Braha)
- Simplify cpuidle_register_device() with guard() (Huisong Li)
- Use performance level if available to distinguish between rates in
OPP debugfs (Manivannan Sadhasivam)
- Fix scoped_guard in dev_pm_opp_xlate_required_opp() (Viresh Kumar)
- Return -ENODATA if the snapshot image is not loaded (Alberto
Garcia)
- Remove inclusion of crypto/hash.h from hibernate_64.c on x86 (Eric
Biggers)
- Clean up and rearrange the intel_rapl power capping driver to make
the respective interface drivers (TPMI, MSR, and MMOI) hold their
own settings and primitives and consolidate PL4 and PMU support
flags into rapl_defaults (Kuppuswamy Sathyanarayanan)
- Correct kernel-doc function parameter names in the power capping
core code (Randy Dunlap)
- Remove unneeded casting for HZ_PER_KHZ in devfreq (Andy Shevchenko)
- Use _visible attribute to replace create/remove_sysfs_files() in
devfreq (Pengjie Zhang)
- Add Tegra114 support to activity monitor device in tegra30-devfreq
as a preparation to upcoming EMC controller support (Svyatoslav
Ryhel)
- Fix mistakes in cpupower man pages, add the boost and epp options
to the cpupower-frequency-info man page, and add the perf-bias
option to the cpupower-info man page (Roberto Ricci)
- Remove unnecessary extern declarations from getopt.h in arguments
parsing functions in cpufreq-set, cpuidle-info, cpuidle-set,
cpupower-info, and cpupower-set utilities (Kaushlendra Kumar)"
* tag 'pm-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (74 commits)
cpufreq/amd-pstate: Add POWER_SUPPLY select for dynamic EPP
cpupower: remove extern declarations in cmd functions
cpuidle: Simplify cpuidle_register_device() with guard()
PM / devfreq: tegra30-devfreq: add support for Tegra114
PM / devfreq: use _visible attribute to replace create/remove_sysfs_files()
PM / devfreq: Remove unneeded casting for HZ_PER_KHZ
MAINTAINERS: amd-pstate: Step down as maintainer, add Prateek as reviewer
cpufreq: Pass the policy to cpufreq_driver->adjust_perf()
cpufreq/amd-pstate: Pass the policy to amd_pstate_update()
cpufreq/amd-pstate-ut: Add a unit test for raw EPP
cpufreq/amd-pstate: Add support for raw EPP writes
cpufreq/amd-pstate: Add support for platform profile class
cpufreq/amd-pstate: add kernel command line to override dynamic epp
cpufreq/amd-pstate: Add dynamic energy performance preference
Documentation: amd-pstate: fix dead links in the reference section
cpufreq/amd-pstate: Cache the max frequency in cpudata
Documentation/amd-pstate: Add documentation for amd_pstate_floor_{freq,count}
Documentation/amd-pstate: List amd_pstate_prefcore_ranking sysfs file
Documentation/amd-pstate: List amd_pstate_hw_prefcore sysfs file
amd-pstate-ut: Add a testcase to validate the visibility of driver attributes
...
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Merge ACPI APEI updates for 7.1-rc1:
- Add devm_ghes_register_vendor_record_notifier(), use it in the PCI
hisi driver, and Add NVIDIA vendor CPER record handler (Kai-Heng
Feng)
* acpi-apei:
ACPI: APEI: GHES: Add NVIDIA vendor CPER record handler
PCI: hisi: Use devm_ghes_register_vendor_record_notifier()
ACPI: APEI: GHES: Add devm_ghes_register_vendor_record_notifier()
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Merge ACPI core driver core driver updates and assorted driver updates
related to ACPI support for 7.1-rc1:
- Clean up the ACPI AC and ACPI PAD (processor aggregator device)
drivers (Rafael Wysocki)
- Rework checking for duplicate video bus devices and consolidate
pnp.bus_id workarounds handling in the ACPI video bus driver (Rafael
Wysocki)
- Update the ACPI core device drivers to stop setting acpi_device_name()
unnecessarily (Rafael Wysocki)
- Rearrange code using acpi_device_class() in the ACPI core device
drivers and update them to stop setting acpi_device_class()
unnecessarily (Rafael Wysocki)
- Define ACPI_AC_CLASS in one place (Rafael Wysocki)
- Convert the ni903x_wdt watchdog driver and the xen ACPI PAD driver to
bind to platform devices instead of ACPI devices (Rafael Wysocki)
* acpi-driver:
watchdog: ni903x_wdt: Convert to a platform driver
ACPI: PAD: xen: Convert to a platform driver
ACPI: AC: Define ACPI_AC_CLASS in one place
ACPI: driver: Do not set acpi_device_class() unnecessarily
ACPI: driver: Avoid using pnp.device_class for netlink handling
ACPI: event: Redefine acpi_notifier_call_chain()
ACPI: driver: Do not set acpi_device_name() unnecessarily
ACPI: video: Consolidate pnp.bus_id workarounds handling
ACPI: video: Rework checking for duplicate video bus devices
driver core: auxiliary bus: Introduce dev_is_auxiliary()
ACPI: PAD: Rearrange notify handler installation and removal
ACPI: AC: Get rid of unnecessary declarations
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Merge updates related to the CMOS RTC driver and x86/ACPI CMOS RTC
support for 7.1-rc1:
- Add ACPI support to the platform device interface in the CMOS RTC
driver, make the ACPI core device enumeration code create a platform
device for the CMOS RTC, and drop CMOS RTC PNP device support (Rafael
Wysocki)
- Consolidate the x86-specific CMOS RTC handling with the ACPI TAD
driver and clean up the CMOS RTC ACPI address space handler (Rafael
Wysocki)
- Enable ACPI alarm in the CMOS RTC driver if advertised in ACPI FADT
and allow that driver to work without a dedicated IRQ if the ACPI
alarm is used (Rafael Wysocki)
* acpi-cmos-rtc:
rtc: cmos: Do not require IRQ if ACPI alarm is used
rtc: cmos: Enable ACPI alarm if advertised in ACPI FADT
ACPI: TAD/x86: cmos_rtc: Consolidate address space handler setup
rtc: cmos: Drop PNP device support
x86: rtc: Drop PNP device check
ACPI: PNP: Drop CMOS RTC PNP device support
ACPI: x86/rtc-cmos: Use platform device for driver binding
ACPI: x86: cmos_rtc: Create a CMOS RTC platform device
ACPI: x86: cmos_rtc: Improve coordination with ACPI TAD driver
ACPI: x86: cmos_rtc: Clean up address space handler driver
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Add a device-managed wrapper around ghes_register_vendor_record_notifier()
so drivers can avoid manual cleanup on device removal or probe failure.
Signed-off-by: Kai-Heng Feng <kaihengf@nvidia.com>
Reviewed-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Shiju Jose <shiju.jose@huawei.com>
Reviewed-by: Shuai Xue <xueshuai@linux.alibaba.com>
Link: https://patch.msgid.link/20260330094203.38022-2-kaihengf@nvidia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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On AMD Ryzen Embedded V1780B (Family 17h, Zen 1), the BIOS does not
provide ACPI _CPC objects and the CPU does not support MSR-based CPPC
(X86_FEATURE_CPPC). The _PSS table only lists nominal P-states
(P0 = 3350 MHz), so when get_max_boost_ratio() fails at
cppc_get_perf_caps(), cpuinfo_max_freq reports only the base frequency
instead of the rated boost frequency (3600 MHz).
dmesg:
ACPI CPPC: No CPC descriptor for CPU:0
acpi_cpufreq: CPU0: Unable to get performance capabilities (-19)
cppc-cpufreq already has a DMI fallback (cppc_get_dmi_max_khz()) that
reads the processor max speed from SMBIOS Type 4. Export it and reuse
it in acpi-cpufreq as a last-resort source for the boost frequency.
A sanity check ensures the DMI value is above the _PSS P0 frequency
and within 2x of it; values outside that range are ignored and the
existing arch_set_max_freq_ratio() path is taken instead. The 2x
upper bound is based on a survey of the AMD Ryzen Embedded V1000
series, where the highest boost-to-base ratio is 1.8x (V1404I:
2.0 GHz base / 3.6 GHz boost).
The DMI lookup and sanity check are wrapped in a helper,
acpi_cpufreq_resolve_max_freq(), which falls through to
arch_set_max_freq_ratio() if the DMI value is absent or
out of range.
Tested on AMD Ryzen Embedded V1780B with v7.0-rc4:
Before: cpuinfo_max_freq = 3350000 (base only)
After: cpuinfo_max_freq = 3600000 (includes boost)
Link: https://www.amd.com/en/products/embedded/ryzen/ryzen-v1000-series.html#specifications
Signed-off-by: Henry Tseng <henrytseng@qnap.com>
Link: https://patch.msgid.link/20260324090948.1667340-1-henrytseng@qnap.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The ACPI_AC_CLASS symbol is defined in several places in the same way
which is rather unfortunate.
Instead, define it in one common header file (acpi_bus.h) so that it is
accessible to all of its users.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/6163384.MhkbZ0Pkbq@rafael.j.wysocki
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Several core ACPI device drivers set acpi_device_class() for the given
struct acpi_device to whatever they like, but that value is never used
unless the driver itself uses it and, sadly, they neglect to clear it on
remove. Since the only one of them still using acpi_device_class()
after previous changes is the button driver, update the others to stop
setting it in vain. Also drop the related device class sybmols that
become redundant.
Since the ACPI button driver continues to use acpi_device_class(), make
it clear the struct field represented by acpi_device_class() in its
remove callback.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3706295.iIbC2pHGDl@rafael.j.wysocki
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Notice that acpi_notifier_call_chain() only uses its device argument
to retrieve the pnp.device_class and pnp.bus_id values from there, so
it can be redefined to take pointers to those two strings as parameters
istead of a struct acpi_device pointer.
That allows all of its callers to pass a string literal as its first
argument, so they won't need to initialize pnp.device_class in
struct acpi_device objects operated by them any more, and its
signature becomes more similar to acpi_bus_generate_netlink_event()
then.
Update the code as per the above.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2056097.PYKUYFuaPT@rafael.j.wysocki
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ACPI drivers usually set acpi_device_name() for the given struct
acpi_device to whatever they like, but that value is never used unless
the driver itself uses it and, quite unfortunately, drivers neglect to
clear it on remove. Some drivers use it for printing messages or
initializing the names of subordinate devices, but it is better to use
string literals for that, especially if the given one is used just once.
To eliminate unnecessary overhead related to acpi_device_name()
handling, rework multiple core ACPI device drivers to stop setting
acpi_device_name() for struct acpi_device objects manipulated
by them and use a string literal instead of it where applicable.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/10840483.nUPlyArG6x@rafael.j.wysocki
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Currently, the `Reference Performance` register is read every time
the CPU frequency is sampled in `cppc_get_perf_ctrs()`. This function
is on the hot path of the cppc_cpufreq driver.
Reference Performance indicates the performance level that corresponds
to the Reference Counter incrementing and is not expected to change
dynamically during runtime (unlike the Delivered and Reference counters).
Reading this register in the hot path incurs unnecessary overhead,
particularly on platforms where CPC registers are located in the PCC
(Platform Communication Channel) subspace. This patch moves
`reference_perf` from the dynamic feedback counters structure
(`cppc_perf_fb_ctrs`) to the static capabilities structure
(`cppc_perf_caps`).
Signed-off-by: Pengjie Zhang <zhangpengjie2@huawei.com>
[ rjw: Changelog adjustment ]
Link: https://patch.msgid.link/20260213100935.19111-1-zhangpengjie2@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Add sysfs interface to read/write the Performance Limited register.
The Performance Limited register indicates to the OS that an
unpredictable event (like thermal throttling) has limited processor
performance. It contains two sticky bits set by the platform:
- Bit 0 (Desired_Excursion): Set when delivered performance is
constrained below desired performance. Not used when Autonomous
Selection is enabled.
- Bit 1 (Minimum_Excursion): Set when delivered performance is
constrained below minimum performance.
These bits remain set until OSPM explicitly clears them. The write
operation accepts a bitmask of bits to clear:
- Write 0x1 to clear bit 0
- Write 0x2 to clear bit 1
- Write 0x3 to clear both bits
This enables users to detect if platform throttling impacted a workload.
Users clear the register before execution, run the workload, then check
afterward - if set, hardware throttling occurred during that time window.
The interface is exposed as:
/sys/devices/system/cpu/cpuX/cpufreq/perf_limited
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Link: https://patch.msgid.link/20260206142658.72583-7-sumitg@nvidia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Add cppc_get_perf() function to read values of performance control
registers including desired_perf, min_perf, max_perf, energy_perf,
and auto_sel.
This provides a read interface to complement the existing
cppc_set_perf() write interface for performance control registers.
Note that auto_sel is read by cppc_get_perf() but not written by
cppc_set_perf() to avoid unintended mode changes during performance
updates. It can be updated with existing dedicated cppc_set_auto_sel()
API.
Use cppc_get_perf() in cppc_cpufreq_get_cpu_data() to initialize
perf_ctrls with current hardware register values during cpufreq
policy initialization.
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Link: https://patch.msgid.link/20260206142658.72583-2-sumitg@nvidia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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