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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/robh/linux
Pull devicetree updates from Rob Herring:
- Add a DT maintainer profile document
- Various dt-check-style improvements
- Add a devres managed reserved memory region init function
- Print node name on any skipped reserved memory regions
- Correctly handle optional argument in
of_parse_phandle_with_args_map()
- Convert ti,keystone-reset, ti,da850-vpif, TI L4 interconnect, TI
SmartReflex, microchip,pic32mzda-dmt, microchip,pic32mzda-wdt, TI
DA8XX MSTPRI bus, and Xen VM bindings to DT schema format
- Add bindings for StarFive JHB100 plic, Allwinner A733 NMI controller,
MediaTek MT8173 GPU, QCom Shikra, Eliza, and Maili cpu-bwmon, and
QCom Shikra SCM firmware
- A couple of syntax fixes found using PoC Rust implementation of
dtschema tools
- Clean-ups for typos, brackets, incorrect "::" usages, and
white-space style
* tag 'devicetree-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (40 commits)
dt-bindings: interconnect: qcom-bwmon: Add Maili cpu-bwmon compatible
dtc: dt-check-style: Simplify setting depth of DtsLine
dtc: dt-check-style: Add missing /dts-v1/ to few test cases
dt-bindings: power: reset: ti,keystone-reset: Convert to DT schema
media: dt-bindings: ti,da850-vpif: Convert to dt-schema
dt-bindings: devfreq: samsung,exynos-ppmu: Use standard regex syntax
dt-bindings: interrupt-controller: mediatek,mt6577-sysirq: Drop invalid JSON pointer
dt-bindings: arm: omap: Convert L4 interconnect to DT schema
dt-bindings: power: Convert TI SmartReflex to DT schema
of: reserved_mem: Introduce devres-managed initialization function
dt-bindings: interrupt-controller: Add StarFive JHB100 plic
dt-bindings: irq: sun7i-nmi: Document the Allwinner A733 NMI controller
dt-bindings: Correct white-space style
dt-bindings: fix typos and brackets
docs: dt: submitting-patches: Mention expectation about dt-check-style
docs: dt: maintainer: Add Devicetree and OF maintainer profile document
docs: dt: writing-schema: Extend expectations about example part of binding
dt-bindings: gpu: powervr-rogue: Add MediaTek MT8173 GPU
of: base: Handle optional argument in of_parse_phandle_with_args_map()
dt-bindings: update Sudeep Holla's email address
...
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git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm
Pull pmdomain updates from Ulf Hansson:
- amlogic: Add support for A9 power domains
- bcm: Raise ASB poll timeout to 100us for bcm2835-power
- imx: Allow building power domain drivers as a modules
- mediatek:
- Add support for the MT6858 power domains
- Add support for the MT8196 HFRP DirectCTL power domains
- qcom:
- Add support for RPMh power domains for Maili
- Skip retention by default for rpmhpd
- renesas: Add support for R-Car X5H Module Controller
- rockchip: Add a regulator to the RK3568 NPU power domain
- tegra: Add support for multi-socket platforms
* tag 'pmdomain-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm: (24 commits)
pmdomain: renesas: Add R-Car X5H MDLC driver
dt-bindings: power: Document Renesas R-Car X5H Module Controller
pmdomain: amlogic: Add support for A9 power domains controller
dt-bindings: power: Add Amlogic A9 power domains
clk: imx: imx8qxp: add soft dependency on SCU power domain driver
pmdomain: imx: scu-pd: allow building as a module
of: export of_stdout symbol
pmdomain: imx8m{p,}-blk-ctrl: Add MODULE_DESCRIPTION
pmdomain: mediatek: Add support for MT6858 SoC
pmdomain: mediatek: Add support for secure modem power domain control
dt-bindings: power: Add MediaTek MT6858 power domain controller
pmdomain: rockchip: Add a regulator to the RK3568 NPU power domain
pmdomain: imx: Make IMX8M/IMX9 BLK_CTRL tristate
dt-bindings: power: qcom,rpmpd: document RPMh power domain for Maili
pmdomain: tegra: Add support for multi-socket platforms
pmdomain: bcm: bcm2835-power: Raise ASB poll timeout to 100us
pmdomain: mediatek: Add support for MT8196 HFRP DirectCTL domains
pmdomain: mediatek: Add support for Direct CTL simple power sequence
pmdomain: mediatek: Respect PD relationships during error cleanup
dt-bindings: power: mediatek: Add support for MT8196 direct HFRP
...
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git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux
Pull kexec updates from Mike Rapoport:
- Deduplicate crash memory allocation and the exclusion of reserved
crash kernel regions from architecture specific code into a generic
crash_prepare_headers() and enable crashkernel CMA reservation on
arm64 and riscv reservation on arm64 and riscv.
- Skip purgatory checksum verification when the kexec segments cannot
be corrupted by DMA, which saves about 250ms on kexec.
- Replace __ASSEMBLY__ with the compiler provided __ASSEMBLER__ in
include/linux/kexec.h.
- Fix a keyring refcount imbalance in the kdump kernel's dm-crypt key
restore path, which over-dropped the user keyring reference when
more than one key was restored.
* tag 'kexec-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux:
crash_dump: release keyring reference at the correct time
kexec: Replace __ASSEMBLY__ with __ASSEMBLER__ in header file
kexec_file: skip checksum verification when safe
riscv: kexec_file: Add support for crashkernel CMA reservation
arm64: kexec_file: Add support for crashkernel CMA reservation
powerpc/kexec_file: Use crash_exclude_core_ranges() helper
LoongArch: kexec_file: Use crash_prepare_headers() helper to simplify code
riscv: kexec_file: Use crash_prepare_headers() helper to simplify code
x86/crash: Use crash_prepare_headers() helper to simplify code
arm64: kexec_file: Use crash_prepare_headers() helper to simplify code
crash: Add crash_prepare_headers() to exclude crash kernel memory
powerpc/crash: sort crash memory ranges before preparing elfcorehdr
riscv: kexec_file: Fix crashk_low_res not exclude bug
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git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock updates from Mike Rapoport:
"Non-urgent fixes:
- Fix calculation of node_spanned_pages when running
with 'kernelcore=mirror'
- Properly handle failure to allocate per_cpu_nodestats
in free_area_init_core_hotplug()
- Fix deferred initialization of the memory map for
configurations where node's RAM end is not aligned
on PAGES_PER_SECTION
Cleanups:
- Remove redundant pageblock_align() call in free_unused_memmap()
- Remove unnecessary invalid range checks in users of memblock
iterators. Some users of for_each_mem_range() and
for_each_mem_pfn_range() verify that start < end for each range.
This is redundant because memblock iterators guarantee to never
return an invalid range
- Stop overlapping zones with 'kernelcore=mirror' and align behaviour
of 'kernelcore=mirror' with other variants of kernelcore and
movablecore
- Remove redundant updates of numa_nodes_parsed mask in the callers
of numa_add_memblk(), the latter always updates the mask anyway
- Remove unnecessary initialization of pgdat->per_cpu_nodestats to
NULL, the variable is reset to the actual value a few lines below"
* tag 'memblock-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock: (25 commits)
mm/mm_init: deferred_grow_zone(): fix out-of-range first_deferred_pfn
mm/mm_init: remove unnecessary initialization of pgdat->per_cpu_nodestats
mm/mm_init: remove redundant memset in free_area_init()
mm: numa_memblks: use numa_add_reserved_memblk() in numa_cleanup_meminfo()
arch_numa: remove redundant node_possible_map assignment
mm: numa_memblks: remove redundant numa_nodemask_from_meminfo()
LoongArch: remove redundant numa_nodes_parsed node_set()
arch_numa: remove redundant numa_nodes_parsed node_set()
x86/numa: remove redundant numa_nodes_parsed node_set()
of/numa: remove redundant numa_nodes_parsed node_set()
ACPI: NUMA: remove redundant numa_nodes_parsed node_set()
mm: numa_memblks: set numa_nodes_parsed in numa_add_memblk()
mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug
mm/mm_init: drop overlap_memmap_init()
mm/mm_init: don't overlap NORMAL and MOVABLE zones with kernelcore=mirror
mm/hugetlb: remove unnecessary empty range check in hugetlb_bootmem_set_nodes()
mm: remove unnecessary empty range check in early_calculate_totalpages()
powerpc64/kasan: Remove unreachable invalid range check in kasan_init_phys_region()
ARM: remove unreachable invalid range check in kasan_init()
riscv: remove unreachable invalid range check in kasan_init()
...
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Introduce devres-based helper for of_reserved_mem_device_init()
to help fight dangling references and ever so slightly reduce the
number of boilerplate deinitialization calls.
Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Link: https://patch.msgid.link/20260730073214.1146432-1-mukesh.ojha@oss.qualcomm.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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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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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree fixes from Rob Herring:
- Fix NULL bus dereference in of_pci_range_parser_one()
- Prevent out-of-bounds access when too many dynamic reserved memory
regions are defined
* tag 'devicetree-fixes-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
of/address: Fix NULL bus dereference in of_pci_range_parser_one()
of: reserved_mem: prevent OOB when too many dynamic regions are defined
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The bus matching rework made of_match_bus() return NULL for nodes with
ranges/dma-ranges but no local #address-cells. parser_init() stored that
NULL bus, and the range iterator later dereferenced it.
Reject such nodes in parser_init(), leaving an explicit empty
iterator for callers that ignore the init return, and make
of_dma_get_max_cpu_address() honour the init failure so a rejected node
cannot clamp the DMA limit.
Fixes: 64ee3cf096ac ("of/address: Rework bus matching to avoid warnings")
Cc: stable@vger.kernel.org
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Link: https://patch.msgid.link/20260727-of-range-parser-null-bus-v3-1-be01b708a4ce@baylibre.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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of_stdout is declared extern in include/linux/of.h alongside of_root
and of_chosen, but unlike those two it is not exported, preventing
modules from referencing it.
Export it with EXPORT_SYMBOL_GPL() so drivers that need the stdout
device node can be built as modules.
Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>
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The kernel doc claims out_args is optional. In practice, the function
unconditionally dereferences it. It feels like calling this function
with a NULL out_args argument may be a valid use case (in order to know
if the lookup would work, even though we might not care about the
result), even though in practice there seem to be no actual user of that
possibility. All callers give an on-stack object to fill.
There are two ways out: either we drop the "optional" wording from the
kernel doc, or we handle the NULL case properly. Since handling this
case goes in favor of more harmonization of the semantics and since
of_parse_phandle_with_args() actually do handle that situation
correctly, let's handle it in the _map() case as well.
Use a local on-stack object in case no argument is passed. This way, we
actually go through the same logic as if there was an argument. We may
however return rather early, since the second part of the function is
dedicated at filling that argument.
Reported-by: Sashiko <sashiko-bot@kernel.org>
Closes: https://lore.kernel.org/all/20260710183359.61D3A1F000E9@smtp.kernel.org/
Signed-off-by: Miquel Raynal (Schneider Electric) <miquel.raynal@bootlin.com>
Link: https://patch.msgid.link/20260716-schneider-v7-2-rc1-eip-of-fix-v1-1-9b9383f936c6@bootlin.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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of_node_init() is a static inline that references of_node_ktype when
CONFIG_OF_KOBJ=y. Any module that calls of_node_init() will therefore
have an unresolved reference to of_node_ktype at load time, because
the symbol is defined in drivers/of/kobj.c but was never exported.
This causes a modpost build error when CONFIG_OF_KOBJ=y and
CONFIG_DRIVER_PE_KUNIT_TEST=m:
ERROR: modpost: "of_node_ktype"
[drivers/base/test/property-entry-test.ko] undefined!
Add EXPORT_SYMBOL_IF_KUNIT(of_node_ktype) so that modules such as the
KUnit property-entry test can call of_node_init() without hitting this
linker error.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202607181651.RnUuV8n6-lkp@intel.com/
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202607181651.RnUuV8n6-lkp@intel.com/
Link: https://patch.msgid.link/20260721105448.2109894-2-xu.yang_2@oss.nxp.com
[ Add empty line before the kunit include. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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On boot, fdt_scan_reserved_mem() saves each dynamically-placed
/reserved-memory subnode into a local array of size
MAX_RESERVED_REGIONS.
If the device tree defines more than MAX_RESERVED_REGIONS
dynamically-placed regions, fdt_scan_reserved_mem() writes past the
end of the local array.
Add a bounds check that logs an error and skips the excess regions,
restoring the original behavior.
Fixes: 8a6e02d0c00e ("of: reserved_mem: Restructure how the reserved memory regions are processed")
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Link: https://patch.msgid.link/20260614133807.2165124-2-ekffu200098@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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When too many reserved memory regions are defined,
fdt_init_reserved_mem_node() logs an error and skips the region without
naming the node.
Print the node name so the skipped node can be identified, matching
fdt_scan_reserved_mem().
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Link: https://patch.msgid.link/20260614133807.2165124-3-ekffu200098@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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Ahead of reworking the reference counting logic for platform devices,
encapsulate the assignment of the OF node for dynamically allocated
platform devices with the provided helper.
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260706-pdev-fwnode-ref-v3-6-1ff028e33779@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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numa_add_memblk() now sets the node in numa_nodes_parsed itself, so the
caller's own node_set() is redundant. Remove it.
No functional change.
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260703041329.2797584-4-ekffu200098@gmail.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
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files)
Replace the #include of <linux/mod_devicetable.h> by the more specific
<linux/device-id/*.h> where applicable. For most cases the include
can be dropped completely, only a few drivers need one or two headers
added.
Acked-by: Danilo Krummrich <dakr@kernel.org>
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
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Commit 35c18f2933c5 ("Add a new optional ",cma" suffix to the
crashkernel= command line option") and commit ab475510e042 ("kdump:
implement reserve_crashkernel_cma") added CMA support for kdump
crashkernel reservation.
Crash kernel memory reservation wastes production resources if too
large, risks kdump failure if too small, and faces allocation difficulties
on fragmented systems due to contiguous block constraints. The new
CMA-based crashkernel reservation scheme splits the "large fixed
reservation" into a "small fixed region + large CMA dynamic region": the
CMA memory is available to userspace during normal operation to avoid
waste, and is reclaimed for kdump upon crash—saving memory while
improving reliability.
So extend crashkernel CMA reservation support to arm64. The following
changes are made to enable CMA reservation:
- Parse and obtain the CMA reservation size along with other crashkernel
parameters.
- Call reserve_crashkernel_cma() to allocate the CMA region for kdump.
- Include the CMA-reserved ranges for kdump kernel to use.
- Exclude the CMA-reserved ranges from the crash kernel memory to
prevent them from being exported through /proc/vmcore, which is already
done in the crash core.
Update kernel-parameters.txt to document CMA support for crashkernel on
arm64 architecture.
Tested-by: Breno Leitao <leitao@debian.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://patch.msgid.link/20260629094746.191843-10-ruanjinjie@huawei.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
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The @filter_np parameter descriptions in of_map_id() and of_map_msi_id()
contained the text '*filter_np' in prose. Docutils interprets a leading
'*' as the start of RST emphasis (italic), but finds no closing '*',
triggering:
Documentation/devicetree/kernel-api:11: ./drivers/of/base.c:2134:
WARNING: Inline emphasis start-string without end-string. [docutils]
Documentation/devicetree/kernel-api:11: ./drivers/of/base.c:2260:
WARNING: Inline emphasis start-string without end-string. [docutils]
Fix by wrapping '*filter_np' in double backticks (*filter_np) to
render it as an RST inline code literal, which is also the correct
kernel-doc convention for pointer expressions.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202606130111.ldC96rqf-lkp@intel.com/
Signed-off-by: Vijayanand Jitta <vijayanand.jitta@oss.qualcomm.com>
Link: https://patch.msgid.link/20260619-iommu_map_kdoc_fix-v1-1-9573e1cf30b3@oss.qualcomm.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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fwnode_property_get_reference_args() should return -ENOENT when an out
of bound index is passed. An issue arised with the OF backend because
the OF API use signed indexes while the fwnode API use unsigned ones.
When an index value greater the INT_MAX was passed to the OF backend
it got casted to a negative value and it returned -EINVAL instead of
-ENOENT. This patch add a check to of_fwnode_get_reference_args() to
catch negative index before they are passed to the OF API and return
-ENOENT right away.
This issue appeared when the following pattern was used in the LED
subsystem:
index = fwnode_property_match_string(fwnode, "led-names", name)
led_node = fwnode_find_reference(fwnode, "leds", index);
Unlike the same pattern with the OF API, this pattern implicitly cast
the signed return value of fwnode_property_match_string() to an
unsigned index leading to the above issue with the OF backend. It can
be argued that the return value of fwnode_property_match_string()
should be checked separately, but I think there is value in supporting
such simple and straight to the point patterns.
Link: https://lore.kernel.org/linux-leds/aimVRwJPhlGxsIUj@tom-desktop/T/#mc43cbf7e0599991b56dd0d9680714d28d145fbc8
Cc: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Alban Bedel <alban.bedel@lht.dlh.de>
Link: https://patch.msgid.link/20260618152035.1600436-1-alban.bedel@lht.dlh.de
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree updates from Rob Herring:
"DT core:
- Add support for handling multiple cells in "iommu-map" entries
- Support only 1 entry in /reserved-memory "reg" entries. Support for
more than 1 entry has been broken
- Fix a UAF on alloc_reserved_mem_array() failure
- Make "ibm,phandle" handling logic specific to PPC
- Use memcpy() instead of strcpy() for known length strings
- Ensure __of_find_n_match_cpu_property() handles malformed "reg"
entries
- Add various checks that expected strings are strings before
accessing them
- Drop redundant memset() when unflattening DT
DT bindings:
- Add a DTS style checker. Currently hooked up to dt_binding_check to
check examples
- Convert st,nomadik platform, ti,omap-dmm, and ti,irq-crossbar
bindings to DT schema
- Add Apple System Management Controller hwmon, Qualcomm Hamoa
Embedded Controller, Qualcomm IPQ6018 PWM controller, fsl,mc1323,
Samsung SOFEF01-M DDIC panel, Freescale i.MX53 Television Encoder,
Samsung S2M series PMIC extcon, and MT6365 PMIC AuxADC schemas
- Extend bindings for QCom Maili and Nord PDC, QCom Hali fastrpc,
qcom,eliza-imem, qcom,oryon-1-5 CPU, and MT6365 Keys
- Consolidate "sram" property definitions
- Fix constraints on "nvmem" properties which only contain phandles
and no arg cells
- Another pass of fixing "phandle-array" constraints
- Add Gira vendor prefix"
* tag 'devicetree-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (50 commits)
dt-bindings: interrupt-controller: qcom,pdc: Add Maili compatible string
dt-bindings: interrupt-controller: ti,irq-crossbar: Convert to DT schema
dt-bindings: vendor-prefixes: add Gira
dt-bindings: embedded-controller: Add Qualcomm reference device EC description
dt-bindings: pwm: add IPQ6018 binding
dt-bindings: hwmon: Add Apple System Management Controller hwmon schema
docs: dt: writing-schema: Clarify what is required in a schema
of: Respect #{iommu,msi}-cells in maps
of: Factor arguments passed to of_map_id() into a struct
of: Add convenience wrappers for of_map_id()
of: reserved_mem: zero total_reserved_mem_cnt if no valid /reserved-memory entry
of: reserved_mem: handle NULL name in of_reserved_mem_lookup()
dt-bindings: cache: l2c2x0: Add missing power-domains
dt-bindings: interrupt-controller: renesas,r9a09g077-icu: Fix reg size in example
dt-bindings: nvmem: consumer: Make 'nvmem' an array of one-item entries
drivers/of/overlay: Use memcpy() to copy known length strings
dt-bindings: add self-test fixtures for style checker
dt-bindings: wire style checker into dt_binding_check
scripts/jobserver-exec: propagate child exit status
dt-bindings: add DTS style checker
...
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So far our parsing of {iommu,msi}-map properties has always blindly
assumed that the output specifiers will always have exactly 1 cell.
This typically does happen to be the case, but is not actually enforced
(and the PCI msi-map binding even explicitly states support for 0 or 1
cells) - as a result we've now ended up with dodgy DTs out in the field
which depend on this behaviour to map a 1-cell specifier for a 2-cell
provider, despite that being bogus per the bindings themselves.
Since there is some potential use in being able to map at least single
input IDs to multi-cell output specifiers (and properly support 0-cell
outputs as well), add support for properly parsing and using the target
nodes' #cells values, albeit with the unfortunate complication of still
having to work around expectations of the old behaviour too.
Since there are multi-cell output specifiers, the callers of of_map_id()
may need to get the exact cell output value for further processing.
Update of_map_id() to set args_count in the output to reflect the actual
number of output specifier cells.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Charan Teja Kalla <charan.kalla@oss.qualcomm.com>
Signed-off-by: Vijayanand Jitta <vijayanand.jitta@oss.qualcomm.com>
Link: https://patch.msgid.link/20260603-parse_iommu_cells-v16-3-dc509dacb19a@oss.qualcomm.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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Change of_map_id() to take a pointer to struct of_phandle_args
instead of passing target device node and translated IDs separately.
Update all callers accordingly.
Add an explicit filter_np parameter to of_map_id() and of_map_msi_id()
to separate the filter input from the output. Previously, the target
parameter served dual purpose: as an input filter (if non-NULL, only
match entries targeting that node) and as an output (receiving the
matched node with a reference held). Now filter_np is the explicit
input filter and arg->np is the pure output.
Previously, of_map_id() would call of_node_put() on the matched node
when a filter was provided, making reference ownership inconsistent.
Remove this internal of_node_put() call so that of_map_id() now always
transfers ownership of the matched node reference to the caller via
arg->np. Callers are now consistently responsible for releasing this
reference with of_node_put(arg->np) when done.
Acked-by: Frank Li <Frank.Li@nxp.com>
Suggested-by: Rob Herring (Arm) <robh@kernel.org>
Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Charan Teja Kalla <charan.kalla@oss.qualcomm.com>
Signed-off-by: Vijayanand Jitta <vijayanand.jitta@oss.qualcomm.com>
Link: https://patch.msgid.link/20260603-parse_iommu_cells-v16-2-dc509dacb19a@oss.qualcomm.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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Since we now have quite a few users parsing "iommu-map" and "msi-map"
properties, give them some wrappers to conveniently encapsulate the
appropriate sets of property names. This will also make it easier to
then change of_map_id() to correctly account for specifier cells.
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Vijayanand Jitta <vijayanand.jitta@oss.qualcomm.com>
Link: https://patch.msgid.link/20260603-parse_iommu_cells-v16-1-dc509dacb19a@oss.qualcomm.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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Prepare for storing /memreserve/ entries in the reserved_mem array.
Zero total_reserved_mem_cnt if no valid /reserved-memory entry,
instead of keeping it's initial value of MAX_RESERVED_REGIONS, this
allows accounting /memreserve entries based on total_reserved_mem_cnt
in a follow-up patch.
No functional change.
Signed-off-by: Wandun Chen <chenwandun@lixiang.com>
Link: https://patch.msgid.link/20260527032917.3385849-5-chenwandun1@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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Prepare for an upcoming change that appends /memreserve/ entries to
reserved_mem[]; such entries have no name.
No functional change.
Signed-off-by: Wandun Chen <chenwandun@lixiang.com>
Link: https://patch.msgid.link/20260527032917.3385849-2-chenwandun1@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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Avoid calls to strcpy().
The lengths of the strings have been used for the kzalloc(), replace
the strcpy() calls with memcpy() using the known lengths.
Signed-off-by: David Laight <david.laight.linux@gmail.com>
Link: https://patch.msgid.link/20260608185121.22331-1-david.laight.linux@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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In __of_find_n_match_cpu_property(), checking the variable ac for 0 won't
prevent a possible overflow when multiplying it by sizeof(*cell). Besides,
of_read_number() (called in the *for* loop) can't return correct result if
that variable (which equals the #address-cells prop's value) exceeds 2, so
additionally checking for that seems logical...
Found by Linux Verification Center (linuxtesting.org) with the Svace static
analysis tool.
Fixes: f3cea45a77c8 ("of: Fix iteration bug over CPU reg properties")
Signed-off-by: Sergey Shtylyov <s.shtylyov@auroraos.dev>
Link: https://patch.msgid.link/0c7bf7e9-887c-42d5-bcfb-0ba7fe1e70b6@auroraos.dev
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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The global pointer 'reserved_mem' continues to reference the
reserved_mem_array which lives in __initdata if
alloc_reserved_mem_array() fails. of_reserved_mem_lookup() is
exported for post-init use, that would dereference freed memory
and trigger a use-after-free.
So reset reserved_mem_count to 0 when alloc_reserved_mem_array()
fails.
Fixes: 00c9a452a235 ("of: reserved_mem: Add code to dynamically allocate reserved_mem array")
Signed-off-by: Wandun Chen <chenwandun@lixiang.com>
Link: https://patch.msgid.link/20260604015332.3669384-1-chenwandun1@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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The "ibm,phandle" thing only seems to be needed on pseries
machines but everyone gets it so they get a string and a little
bit of useless code.
In __of_attach_node() the pseries specific part uses
IS_ENABLED(CONFIG_PPC_PSERIES) so do that here too.
Signed-off-by: Daniel Palmer <daniel@thingy.jp>
Link: https://patch.msgid.link/20260603151809.3256280-1-daniel@thingy.jp
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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A /reserved-memory child node may have multiple <base size> tuples in
'reg' property, but multiple entries in 'reg' have never been fully
functional:
- fdt_scan_reserved_mem() in the early pass loops over every
tuple and reserves them all.
- fdt_scan_reserved_mem_late() reads 'reg' by
of_flat_dt_get_addr_size(), which returns false if entries != 1.
So 'reg' property with multiple <base size> entries will be
skipped, no reserved_mem entry is created in reserved_mem[].
Supporting multiple <base size> tuples is not a good idea:
- It requires reserved_mem_ops->node_init support. Currently,
CMA(rmem_cma_setup) and DMA(rmem_dma_setup) are not supported.
- of_reserved_mem_lookup() is name-based, only the first entry in
multiple <base size> tuples will be found.
So change to support one <base size> entry in 'reg' property.
Also update dt binding:
https://github.com/devicetree-org/dt-schema/pull/197
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wandun Chen <chenwandun@lixiang.com>
Tested-by: Meijing Zhao <zhaomeijing@lixiang.com>
Link: https://lore.kernel.org/all/20260506014752.GA280279-robh@kernel.org/
Link: https://patch.msgid.link/20260525121700.2706141-1-chenwandun1@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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When an overlay is applied, if the target device has already probed
successfully and bound to a device, then some of the fw_devlink logic
that ran when the device was probed needs to be rerun. This allows newly
created dangling consumers of the overlayed device tree nodes to be
moved to become consumers of the target device.
[Herve: Add the call to driver_deferred_probe_trigger()]
[Herve: Use fwnode_test_flag() to test fwnode flags value]
Fixes: 1a50d9403fb9 ("treewide: Fix probing of devices in DT overlays")
Reported-by: Herve Codina <herve.codina@bootlin.com>
Closes: https://lore.kernel.org/lkml/CAMuHMdXEnSD4rRJ-o90x4OprUacN_rJgyo8x6=9F9rZ+-KzjOg@mail.gmail.com/
Closes: https://lore.kernel.org/all/20240221095137.616d2aaa@bootlin.com/
Closes: https://lore.kernel.org/lkml/20240312151835.29ef62a0@bootlin.com/
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/lkml/20240411235623.1260061-3-saravanak@google.com/
[Herve: Rebase on top of recent kernel]
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Tested-by: Kalle Niemi <kaleposti@gmail.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260511155755.34428-3-herve.codina@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This reverts commit 1a50d9403fb90cbe4dea0ec9fd0351d2ecbd8924.
While the commit fixed fw_devlink overlay handling for one case, it
broke it for another case. So revert it and redo the fix in a separate
patch.
Fixes: 1a50d9403fb9 ("treewide: Fix probing of devices in DT overlays")
Reported-by: Herve Codina <herve.codina@bootlin.com>
Closes: https://lore.kernel.org/lkml/CAMuHMdXEnSD4rRJ-o90x4OprUacN_rJgyo8x6=9F9rZ+-KzjOg@mail.gmail.com/
Closes: https://lore.kernel.org/all/20240221095137.616d2aaa@bootlin.com/
Closes: https://lore.kernel.org/lkml/20240312151835.29ef62a0@bootlin.com/
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/lkml/20240411235623.1260061-2-saravanak@google.com/
[Herve: Fix conflicts due to f72e77c33e4b ("device property: Make
modifications of fwnode "flags" thread safe")]
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com> # for I2C
Link: https://patch.msgid.link/20260511155755.34428-2-herve.codina@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Live-tree reconfiguration properties also carry raw values plus explicit
lengths. `of_reconfig_get_state_change()` currently treats `status`
property values as NUL-terminated strings and feeds them straight into
`strcmp()`.
Factor the `"okay"` / `"ok"` check out into a helper that first verifies
that the property contains a bounded C string within `prop->length`.
Malformed `status` updates should be treated as not enabling the node.
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Link: https://patch.msgid.link/20260507081812.91838-2-pengpeng@iscas.ac.cn
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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`populate_properties()` stores live-tree property values as raw byte
sequences plus a separate `length`. They are not globally guaranteed to
be NUL-terminated.
`of_prop_next_string()` iterates string-list properties by walking raw
bytes, `__of_node_is_type()` checks `device_type`,
`__of_device_is_status()` checks `status`, and
`of_alias_from_compatible()` reads the first `compatible` entry. These
paths must validate that the relevant string fits within the property
bounds before they hand it to C string helpers.
Validate these live-tree string properties within their declared bounds.
In particular, make `of_prop_next_string()` reject malformed entries
before returning them, keep the `device_type` check inside the existing
no-lock helper path, and add unit coverage for malformed first and
trailing string-list entries.
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Link: https://patch.msgid.link/20260507081812.91838-1-pengpeng@iscas.ac.cn
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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Now that memblock and slab allocators are the only allocators and both
return zero-initialized memory, zeroing the memory ourselves is
redundant. The allocators used are:
- kernel_tree_alloc uses kzalloc()
- early_init_dt_alloc_memory_arch() and dt_alloc_memory() both use
memblock_alloc()
Remove redundant memset after the allocation. No funtional change.
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Link: https://patch.msgid.link/20260418140420.2221736-1-ekffu200098@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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In C, bitfields are not necessarily safe to modify from multiple
threads without locking. Switch "of_node_reused" over to the "flags"
field so modifications are safe.
Cc: Johan Hovold <johan@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Johan Hovold <johan@kernel.org>
Acked-by: Manivannan Sadhasivam <mani@kernel.org> # PCI_PWRCTRL
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://patch.msgid.link/20260406162231.v5.8.I806b8636cd3724f6cd1f5e199318ab8694472d90@changeid
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock updates from Mike Rapoport:
- improve debuggability of reserve_mem kernel parameter handling with
print outs in case of a failure and debugfs info showing what was
actually reserved
- Make memblock_free_late() and free_reserved_area() use the same core
logic for freeing the memory to buddy and ensure it takes care of
updating memblock arrays when ARCH_KEEP_MEMBLOCK is enabled.
* tag 'memblock-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
x86/alternative: delay freeing of smp_locks section
memblock: warn when freeing reserved memory before memory map is initialized
memblock, treewide: make memblock_free() handle late freeing
memblock: make free_reserved_area() update memblock if ARCH_KEEP_MEMBLOCK=y
memblock: extract page freeing from free_reserved_area() into a helper
memblock: make free_reserved_area() more robust
mm: move free_reserved_area() to mm/memblock.c
powerpc: opal-core: pair alloc_pages_exact() with free_pages_exact()
powerpc: fadump: pair alloc_pages_exact() with free_pages_exact()
memblock: reserve_mem: fix end caclulation in reserve_mem_release_by_name()
memblock: move reserve_bootmem_range() to memblock.c and make it static
memblock: Add reserve_mem debugfs info
memblock: Print out errors on reserve_mem parser
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree updates from Rob Herring:
"DT core:
- Cleanup of the reserved memory code to keep CMA specifics in CMA
code
- Add and convert several users to new of_machine_get_match() helper
- Validate nul termination in string properties
- Update dtc to upstream v1.7.2-69-g53373d135579
- Limit matching reserved memory devices to /reserved-memory nodes
- Fix some UAF in unittests
- Remove Baikal SoC bus driver
- Fix false DT_SPLIT_BINDING_PATCH checkpatch warning
- Allow fw_devlink device-tree on x86
- Fix kerneldoc return description for of_property_count_elems_of_size()
DT bindings:
- Add fsl,imx25-aips, fsl,imx25-tcq, qcom,eliza-pdc,
qcom,eliza-spmi-pmic-arb, qcom,hawi-imem, qcom,milos-imem,
qcom,hawi-pdc, and lg,sw49410 bindings
- Convert arm,vexpress-scc to DT schema
- Deprecate Qualcomm generic CPU compatibles. Add Apple M3 CPU cores.
- Move some dual-link display panels to the dual-link schema
- Drop mux controller node name constraints
- Remove Baikal SoC bus bindings
- Fix a false warning in the thermal trip node binding"
* tag 'devicetree-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (39 commits)
dt-bindings: display: panel: panel-simple: Add lg,sw49410 compatible
dt-bindings: display: ti, am65x-dss: Fix AM62L DSS reg and clock constraints
dt-bindings: display: simple: Move Innolux G156HCE-L01 panel to dual-link
dt-bindings: display: simple: Move AUO 21.5" FHD to dual-link
dt-bindings: thermal: Fix false warning with 'phandle' in trips nodes
of: unittest: fix use-after-free in testdrv_probe()
of: unittest: fix use-after-free in of_unittest_changeset()
dt-bindings: qcom,pdc: document the Hawi Power Domain Controller
dt-bindings: ARM: arm,vexpress-scc: convert to DT schema
drivers/of: fdt: validate flat DT string properties before string use
drivers/of: fdt: validate stdout-path properties before parsing them
dt-bindings: sram: Document qcom,hawi-imem compatible
dt-bindings: sram: Allow multiple-word prefixes to sram subnode
dt-bindings: sram: Document qcom,milos-imem
scripts/dtc: Update to upstream version v1.7.2-69-g53373d135579
of: property: Allow fw_devlink device-tree on x86
dt-bindings: arm: cpus: Add Apple M3 CPU core compatibles
dt-bindings: display: lt8912b: Drop redundant endpoint properties
dt-bindings: opp-v2: Fix example 3 CPU reg value
dt-bindings: connector: add pd-disable dependency
...
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git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
Pull dma-mapping updates from Marek Szyprowski:
- added support for batched cache sync, what improves performance of
dma_map/unmap_sg() operations on ARM64 architecture (Barry Song)
- introduced DMA_ATTR_CC_SHARED attribute for explicitly shared memory
used in confidential computing (Jiri Pirko)
- refactored spaghetti-like code in drivers/of/of_reserved_mem.c and
its clients (Marek Szyprowski, shared branch with device-tree updates
to avoid merge conflicts)
- prepared Contiguous Memory Allocator related code for making dma-buf
drivers modularized (Maxime Ripard)
- added support for benchmarking dma_map_sg() calls to tools/dma
utility (Qinxin Xia)
* tag 'dma-mapping-7.1-2026-04-16' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux: (24 commits)
dma-buf: heaps: system: document system_cc_shared heap
dma-buf: heaps: system: add system_cc_shared heap for explicitly shared memory
dma-mapping: introduce DMA_ATTR_CC_SHARED for shared memory
mm: cma: Export cma_alloc(), cma_release() and cma_get_name()
dma: contiguous: Export dev_get_cma_area()
dma: contiguous: Make dma_contiguous_default_area static
dma: contiguous: Make dev_get_cma_area() a proper function
dma: contiguous: Turn heap registration logic around
of: reserved_mem: rework fdt_init_reserved_mem_node()
of: reserved_mem: clarify fdt_scan_reserved_mem*() functions
of: reserved_mem: rearrange code a bit
of: reserved_mem: replace CMA quirks by generic methods
of: reserved_mem: switch to ops based OF_DECLARE()
of: reserved_mem: use -ENODEV instead of -ENOENT
of: reserved_mem: remove fdt node from the structure
dma-mapping: fix false kernel-doc comment marker
dma-mapping: Support batch mode for dma_direct_{map,unmap}_sg
dma-mapping: Separate DMA sync issuing and completion waiting
arm64: Provide dcache_inval_poc_nosync helper
arm64: Provide dcache_clean_poc_nosync helper
...
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
- "pid: make sub-init creation retryable" (Oleg Nesterov)
Make creation of init in a new namespace more robust by clearing away
some historical cruft which is no longer needed. Also some
documentation fixups
- "selftests/fchmodat2: Error handling and general" (Mark Brown)
Fix and a cleanup for the fchmodat2() syscall selftest
- "lib: polynomial: Move to math/ and clean up" (Andy Shevchenko)
- "hung_task: Provide runtime reset interface for hung task detector"
(Aaron Tomlin)
Give administrators the ability to zero out
/proc/sys/kernel/hung_task_detect_count
- "tools/getdelays: use the static UAPI headers from
tools/include/uapi" (Thomas Weißschuh)
Teach getdelays to use the in-kernel UAPI headers rather than the
system-provided ones
- "watchdog/hardlockup: Improvements to hardlockup" (Mayank Rungta)
Several cleanups and fixups to the hardlockup detector code and its
documentation
- "lib/bch: fix undefined behavior from signed left-shifts" (Josh Law)
A couple of small/theoretical fixes in the bch code
- "ocfs2/dlm: fix two bugs in dlm_match_regions()" (Junrui Luo)
- "cleanup the RAID5 XOR library" (Christoph Hellwig)
A quite far-reaching cleanup to this code. I can't do better than to
quote Christoph:
"The XOR library used for the RAID5 parity is a bit of a mess right
now. The main file sits in crypto/ despite not being cryptography
and not using the crypto API, with the generic implementations
sitting in include/asm-generic and the arch implementations
sitting in an asm/ header in theory. The latter doesn't work for
many cases, so architectures often build the code directly into
the core kernel, or create another module for the architecture
code.
Change this to a single module in lib/ that also contains the
architecture optimizations, similar to the library work Eric
Biggers has done for the CRC and crypto libraries later. After
that it changes to better calling conventions that allow for
smarter architecture implementations (although none is contained
here yet), and uses static_call to avoid indirection function call
overhead"
- "lib/list_sort: Clean up list_sort() scheduling workarounds"
(Kuan-Wei Chiu)
Clean up this library code by removing a hacky thing which was added
for UBIFS, which UBIFS doesn't actually need
- "Fix bugs in extract_iter_to_sg()" (Christian Ehrhardt)
Fix a few bugs in the scatterlist code, add in-kernel tests for the
now-fixed bugs and fix a leak in the test itself
- "kdump: Enable LUKS-encrypted dump target support in ARM64 and
PowerPC" (Coiby Xu)
Enable support of the LUKS-encrypted device dump target on arm64 and
powerpc
- "ocfs2: consolidate extent list validation into block read callbacks"
(Joseph Qi)
Cleanup, simplify, and make more robust ocfs2's validation of extent
list fields (Kernel test robot loves mounting corrupted fs images!)
* tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (127 commits)
ocfs2: validate group add input before caching
ocfs2: validate bg_bits during freefrag scan
ocfs2: fix listxattr handling when the buffer is full
doc: watchdog: fix typos etc
update Sean's email address
ocfs2: use get_random_u32() where appropriate
ocfs2: split transactions in dio completion to avoid credit exhaustion
ocfs2: remove redundant l_next_free_rec check in __ocfs2_find_path()
ocfs2: validate extent block list fields during block read
ocfs2: remove empty extent list check in ocfs2_dx_dir_lookup_rec()
ocfs2: validate dx_root extent list fields during block read
ocfs2: fix use-after-free in ocfs2_fault() when VM_FAULT_RETRY
ocfs2: handle invalid dinode in ocfs2_group_extend
.get_maintainer.ignore: add Askar
ocfs2: validate bg_list extent bounds in discontig groups
checkpatch: exclude forward declarations of const structs
tools/accounting: handle truncated taskstats netlink messages
taskstats: set version in TGID exit notifications
ocfs2/heartbeat: fix slot mapping rollback leaks on error paths
arm64,ppc64le/kdump: pass dm-crypt keys to kdump kernel
...
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The function testdrv_probe() retrieves the device_node from the PCI
device, applies an overlay, and then immediately calls of_node_put(dn).
This releases the reference held by the PCI core, potentially freeing
the node if the reference count drops to zero. Later, the same freed
pointer 'dn' is passed to of_platform_default_populate(), leading to a
use-after-free.
The reference to pdev->dev.of_node is owned by the device model and
should not be released by the driver. Remove the erroneous of_node_put()
to prevent premature freeing.
Fixes: 26409dd04589 ("of: unittest: Add pci_dt_testdrv pci driver")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Link: https://patch.msgid.link/20260409034859.429071-1-vulab@iscas.ac.cn
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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The variable 'parent' is assigned the value of 'nchangeset' earlier in the
function, meaning both point to the same struct device_node. The call to
of_node_put(nchangeset) can decrement the reference count to zero and
free the node if there are no other holders. After that, the code still
uses 'parent' to check for the presence of a property and to read a
string property, leading to a use-after-free.
Fix this by moving the of_node_put() call after the last access to
'parent', avoiding the UAF.
Fixes: 1c668ea65506 ("of: unittest: Use of_property_present()")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Link: https://patch.msgid.link/20260409022233.418103-1-vulab@iscas.ac.cn
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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Firmware-supplied flat DT properties are raw byte sequences. Several
early FDT helpers fetch properties such as status, model, compatible,
and device_type and then use them as C strings with strcmp(), strlen(),
or pr_info() without first proving that the property is NUL-terminated
within its declared length.
Use fdt_stringlist_get() for these string properties instead. That
preserves the existing behavior for valid DTBs while rejecting malformed
unterminated properties before they are passed to C string helpers.
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Link: https://patch.msgid.link/20260403164501.1-drivers-of-fdt-v2-pengpeng@iscas.ac.cn
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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early_init_dt_scan_chosen_stdout() fetches stdout-path and
linux,stdout-path directly from the flat DT and immediately passes the
result to strchrnul(). Flat DT properties are raw firmware-supplied
byte sequences, and this path does not prove that either property is
NUL-terminated within its declared bounds.
Use fdt_stringlist_get() so malformed unterminated stdout-path
properties are rejected before the local parser walks them as C
strings.
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Link: https://patch.msgid.link/20260403143001.1-dt-fdt-stdout-pengpeng@iscas.ac.cn
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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PCI drivers can use a device-tree overlay to describe the hardware
available on the PCI board. This is the case, for instance, of the
LAN966x PCI device driver.
Adding some more nodes in the device-tree overlay adds some more
consumer/supplier relationship between devices instantiated from this
overlay.
Those fw_node consumer/supplier relationships are handled by fw_devlink
and are created based on the device-tree parsing done by the
of_fwnode_add_links() function.
Those consumer/supplier links are needed in order to ensure a correct PM
runtime management and a correct removal order between devices.
For instance, without those links a supplier can be removed before its
consumers is removed leading to all kind of issue if this consumer still
want the use the already removed supplier.
The support for the usage of an overlay from a PCI driver has been added
on x86 systems in commit 1f340724419ed ("PCI: of: Create device tree PCI
host bridge node").
In the past, support for fw_devlink on x86 had been tried but this
support has been removed in commit 4a48b66b3f52 ("of: property: Disable
fw_devlink DT support for X86"). Indeed, this support was breaking some
x86 systems such as OLPC system and the regression was reported in [0].
Instead of disabling this support for all x86 system, use a finer grain
and disable this support only for the possible problematic subset of x86
systems (at least OLPC and CE4100).
Those systems use a device-tree to describe their hardware. Identify
those systems using key properties in the device-tree.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Link: https://lore.kernel.org/lkml/3c1f2473-92ad-bfc4-258e-a5a08ad73dd0@web.de/ [0]
Link: https://patch.msgid.link/20260325143555.451852-18-herve.codina@bootlin.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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CONFIG_CRASH_DM_CRYPT has been introduced to support LUKS-encrypted
device dump target by addressing two challenges [1],
- Kdump kernel may not be able to decrypt the LUKS partition. For some
machines, a system administrator may not have a chance to enter the
password to decrypt the device in kdump initramfs after the 1st kernel
crashes
- LUKS2 by default use the memory-hard Argon2 key derivation function
which is quite memory-consuming compared to the limited memory reserved
for kdump.
To also enable this feature for ARM64 and PowerPC, the missing piece is to
let the kdump kernel know where to find the dm-crypt keys which are
randomly stored in memory reserved for kdump. Introduce a new device tree
property dmcryptkeys [2] as similar to elfcorehdr to pass the memory
address of the stored info of dm-crypt keys to the kdump kernel. Since
this property is only needed by the kdump kernel, it won't be exposed to
userspace.
Link: https://lkml.kernel.org/r/20260225060347.718905-4-coxu@redhat.com
Link: https://lore.kernel.org/all/20250502011246.99238-1-coxu@redhat.com/ [1]
Link: https://github.com/devicetree-org/dt-schema/pull/181 [2]
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Cc: Arnaud Lefebvre <arnaud.lefebvre@clever-cloud.com>
Cc: Baoquan he <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Kairui Song <ryncsn@gmail.com>
Cc: Pingfan Liu <kernelfans@gmail.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Thomas Staudt <tstaudt@de.ibm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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It shouldn't be responsibility of memblock users to detect if they free
memory allocated from memblock late and should use memblock_free_late().
Make memblock_free() and memblock_phys_free() take care of late memory
freeing and drop memblock_free_late().
Link: https://patch.msgid.link/20260323074836.3653702-9-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
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In various places in the kernel, we modify the fwnode "flags" member
by doing either:
fwnode->flags |= SOME_FLAG;
fwnode->flags &= ~SOME_FLAG;
This type of modification is not thread-safe. If two threads are both
mucking with the flags at the same time then one can clobber the
other.
While flags are often modified while under the "fwnode_link_lock",
this is not universally true.
Create some accessor functions for setting, clearing, and testing the
FWNODE flags and move all users to these accessor functions. New
accessor functions use set_bit() and clear_bit(), which are
thread-safe.
Cc: stable@vger.kernel.org
Fixes: c2c724c868c4 ("driver core: Add fw_devlink_parse_fwtree()")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Reviewed-by: Saravana Kannan <saravanak@kernel.org>
Link: https://patch.msgid.link/20260317090112.v2.1.I0a4d03104ecd5103df3d76f66c8d21b1d15a2e38@changeid
[ Fix fwnode_clear_flag() argument alignment, restore dropped blank
line in fwnode_dev_initialized(), and remove unnecessary parentheses
around fwnode_test_flag() calls. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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