kernel/git/stable/linux.git/include/acpi, branch master

Merge tag 'acpi-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2026-08-26T21:06:08+00:00

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

Merge branch 'acpi-bus'

2026-08-26T17:22:52+00:00

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()

Merge tag 'driver-core-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

2026-08-19T17:42:18+00:00

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, 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 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 ...

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2026-08-18T18:57:17+00:00

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= arm64: entry: mask DAIF before returning from C EL1 handlers ...

ACPI: bus: Introduce acpi_bus_get_primary_device()

2026-08-14T19:49:41+00:00

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 Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/2843318.mvXUDI8C0e@rafael.j.wysocki

Merge back ACPI bus type changes for 7.3

2026-08-14T19:48:40+00:00

Merge branches 'acpi-scan', 'acpi-pci', 'acpi-tad' and 'acpi-apei'

2026-08-10T10:45:05+00:00

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

Merge tag 'v7.2-rc7' into driver-core-next

2026-08-09T23:20:05+00:00

We need the driver-core fixes in here as well to build on top of. Signed-off-by: Danilo Krummrich

Merge branches 'acpi-bus', 'acpi-sysfs', 'acpi-tables' and 'acpi-driver'

2026-08-07T15:58:05+00:00

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()

ACPI: CPPC: Avoid locking standalone full-width registers

2026-08-05T13:09:45+00:00

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 Link: https://patch.msgid.link/20260803210527.1285229-3-christian.loehle@arm.com Signed-off-by: Rafael J. Wysocki