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Adjust system call for both 32BIT and 64BIT, including: add the uapi
unistd_{32,64}.h and syscall_table_{32,64}.h inclusion, add sys_mmap2()
definition, change the system call entry routines, etc.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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Adjust module loader for both 32BIT and 64BIT, including: change the s64
type to long, change the u64 type to unsigned long, change the plt entry
definition and handling, etc.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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Adjust time routines for both 32BIT and 64BIT, including: rdtime_h() /
rdtime_l() definitions for 32BIT and rdtime_d() definition for 64BIT,
get_cycles() and get_cycles64() definitions for 32BIT/64BIT, show time
frequency info ("CPU MHz" and "BogoMIPS") in /proc/cpuinfo, etc.
Use do_div() for division which works on both 32BIT and 64BIT platforms.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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Adjust process management for both 32BIT and 64BIT, including: CPU
context switching, FPU loading/restoring, process dumping and process
tracing routines.
Q: Why modify switch.S?
A: LoongArch32 has no ldptr.d/stptr.d instructions, and asm offsets of
thead_struct members are too large to be filled in the 12b immediate
field of ld.w/st.w.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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Adjust memory management for both 32BIT and 64BIT, including: address
space definition, DMW CSR definition, page table bits definition, boot
time detection of VA/PA bits, page table init, tlb exception handling,
copy_page/clear_page/dump_tlb libraries, etc.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yawei Li <liyawei@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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Adjust boot & setup for both 32BIT and 64BIT, including: efi header
definition, MAX_IO_PICS definition, kernel entry and environment setup
routines, etc.
Add a fallback path in fdt_cpu_clk_init() to avoid 0MHz in /proc/cpuinfo
if there is no valid clock freq from firmware.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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s390 is one of the last architectures using the legacy API for setup and
teardown of PCI MSI IRQs. Migrate the s390 IRQ allocation and teardown
to the MSI parent domain API. For details, see:
https://lore.kernel.org/lkml/20221111120501.026511281@linutronix.de
In detail, create an MSI parent domain for each PCI domain. When a PCI
device sets up MSI or MSI-X IRQs, the library creates a per-device IRQ
domain for this device, which is used by the device for allocating and
freeing IRQs.
The per-device domain delegates this allocation and freeing to the
parent-domain. In the end, the corresponding callbacks of the parent
domain are responsible for allocating and freeing the IRQs.
The allocation is split into two parts:
- zpci_msi_prepare() is called once for each device and allocates the
required resources. On s390, each PCI function has its own airq
vector and a summary bit, which must be configured once per function.
This is done in prepare().
- zpci_msi_alloc() can be called multiple times for allocating one or
more MSI/MSI-X IRQs. This creates a mapping between the virtual IRQ
number in the kernel and the hardware IRQ number.
Freeing is split into two counterparts:
- zpci_msi_free() reverts the effects of zpci_msi_alloc() and
- zpci_msi_teardown() reverts the effects of zpci_msi_prepare(). This is
called once when all IRQs are freed before a device is removed.
Since the parent domain in the end allocates the IRQs, the hwirq
encoding must be unambiguous for all IRQs of all devices. This is
achieved by encoding the hwirq using the devfn and the MSI index.
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Tobias Schumacher <ts@linux.ibm.com>
Reviewed-by: Gerd Bayer <gbayer@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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After support for VIRT_XFER_TO_GUEST_WORK is available for s390 it is
possible to also select HAVE_POSIX_CPU_TIMERS_TASK_WORK. See [1] for the
reasons why it makes sense, also for architectures which do not support
PREEMPT_RT.
[1] https://lore.kernel.org/all/20200716201923.228696399@linutronix.de
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Teach the memory hotplug path to tear down KASAN shadow that
was mapped during early boot when a memory block is offlined.
Track for each sclp_mem whether its range was covered by the early
KASAN shadow via an early_shadow_mapped flag. When such a block is
deconfigured and removed via sclp_config_mem_store(), compute the
corresponding shadow range and call vmemmap_free() to unmap the
boot mapped shadow, then clear the flag.
Using vmemmap_free() for the early shadow is safe despite the use
of large mappings in the boot-time KASAN setup. The initial shadow
is mapped with 1M and 2G pages, where possible. The minimum hotplug
memory block size is 128M and always aligned (the identity mapping
is at least 2G aligned), which corresponds to a 16M chunk of at
least 1M aligned shadow. PMD-mapped 1M shadow pages therefore
never need splitting, and PUD-mapped 2G shadow pages can now be
split following the preceding changes.
Relax the modify_pagetable() sanity check in vmem so that, with
KASAN enabled, it may also operate on the KASAN shadow region in
addition to the 1:1 mapping and vmemmap area. This allows the KASAN
shadow unmapping to reuse the common vmem helpers.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Export split_pud_page() so it can be used from the vmem code and teach
modify_pud_table() to split PUD-sized mappings when only a subrange
needs to be removed.
If the range to be removed covers a full PUD-sized mapping, keep the
existing behavior: clear the PUD entry and free the backing large page
(for non-direct mappings). Otherwise, split the PUD-mapped page into
PMD mappings and let the walker handle the smaller ranges.
This is needed for KASAN early shadow removal support: memory hotplug
freeing the KASAN early shadow is the only expected caller that will
try to free 2G PUD-mapped regions of non-direct mappings.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Make boot_pte_alloc() always allocate a full PAGE_SIZE page for
PTE tables, instead of carving two 2K PTE tables out of a single
4K page, similar to commit daa8af80d283 ("s390/mm: Allocate page
table with PAGE_SIZE granularity").
This mirrors the change in the vmem code and ensures that boot page
tables backing the early KASAN shadow can later be fully freed by
the vmem page-table teardown helpers (e.g. when unmapping early
KASAN shadow on memory hotplug).
The leftover-based allocation was originally added to reduce physmem
allocator fragmentation when EDAT was disabled. On current hardware
EDAT1 is available on all production systems, so the complexity is no
longer justified and gets in the way of freeing the shadow mappings.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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ALSA 0.9.0-rc3 is from 2002, 23 years old.
Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Acked-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20251203-old-alsa-v1-1-ac80704f52c3@ixit.cz
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial updates from Greg KH:
"Here is the big set of tty/serial driver changes for 6.19-rc1. Nothing
major at all, just small constant churn to make the tty layer
"cleaner" as well as serial driver updates and even a new test added!
Included in here are:
- More tty/serial cleanups from Jiri
- tty tiocsti test added to hopefully ensure we don't regress in this
area again
- sc16is7xx driver updates
- imx serial driver updates
- 8250 driver updates
- new hardware device ids added
- other minor serial/tty driver cleanups and tweaks
All of these have been in linux-next for a while with no reported
issues"
* tag 'tty-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (60 commits)
serial: sh-sci: Fix deadlock during RSCI FIFO overrun error
dt-bindings: serial: rsci: Drop "uart-has-rtscts: false"
LoongArch: dts: Add uart new compatible string
serial: 8250: Add Loongson uart driver support
dt-bindings: serial: 8250: Add Loongson uart compatible
serial: 8250: add driver for KEBA UART
serial: Keep rs485 settings for devices without firmware node
serial: qcom-geni: Enable Serial on SA8255p Qualcomm platforms
serial: qcom-geni: Enable PM runtime for serial driver
serial: sprd: Return -EPROBE_DEFER when uart clock is not ready
tty: serial: samsung: Declare earlycon for Exynos850
serial: icom: Convert PCIBIOS_* return codes to errnos
serial: 8250-of: Fix style issues in 8250_of.c
serial: add support of CPCI cards
serial: mux: Fix kernel doc for mux_poll()
tty: replace use of system_unbound_wq with system_dfl_wq
serial: 8250_platform: simplify IRQF_SHARED handling
serial: 8250: make share_irqs local to 8250_platform
serial: 8250: move skip_txen_test to core
serial: drop SERIAL_8250_DEPRECATED_OPTIONS
...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc/IIO driver updates from Greg KH:
"Here is the big set of char/misc/iio driver updates for 6.19-rc1. Lots
of stuff in here including:
- lots of IIO driver updates, cleanups, and additions
- large interconnect driver changes as they get converted over to a
dynamic system of ids
- coresight driver updates
- mwave driver updates
- binder driver updates and changes
- comedi driver fixes now that the fuzzers are being set loose on
them
- nvmem driver updates
- new uio driver addition
- lots of other small char/misc driver updates, full details in the
shortlog
All of these have been in linux-next for a while now"
* tag 'char-misc-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (304 commits)
char: applicom: fix NULL pointer dereference in ac_ioctl
hangcheck-timer: fix coding style spacing
hangcheck-timer: Replace %Ld with %lld
hangcheck-timer: replace printk(KERN_CRIT) with pr_crit
uio: Add SVA support for PCI devices via uio_pci_generic_sva.c
dt-bindings: slimbus: fix warning from example
intel_th: Fix error handling in intel_th_output_open
misc: rp1: Fix an error handling path in rp1_probe()
char: xillybus: add WQ_UNBOUND to alloc_workqueue users
misc: bh1770glc: use pm_runtime_resume_and_get() in power_state_store
misc: cb710: Fix a NULL vs IS_ERR() check in probe()
mux: mmio: Add suspend and resume support
virt: acrn: split acrn_mmio_dev_res out of acrn_mmiodev
greybus: gb-beagleplay: Fix timeout handling in bootloader functions
greybus: add WQ_PERCPU to alloc_workqueue users
char/mwave: drop typedefs
char/mwave: drop printk wrapper
char/mwave: remove printk tracing
char/mwave: remove unneeded fops
char/mwave: remove MWAVE_FUTZ_WITH_OTHER_DEVICES ifdeffery
...
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc architecture updates from Helge Deller:
"A fix which allows booting on the very old 710 workstations, and two
fixes in the syscall entry/exit path which allow to execute 64-bit
userspace binaries.
Note that although we currently have a 64-bit (static) kernel to allow
more than 4 GB physical RAM, there is no support for 64-bit userspace
for parisc-linux yet, but Dave and Sven are making slowly progress to
port and fix glibc and gcc.
Summary:
- Fix boot on 710 workstation by not reprogramming ASP chip
- Fix 64bit userspace syscalls (64-bit userspace is still being
developed)
- minor code cleanups in asm/bug.h and perf_regs.c"
* tag 'parisc-for-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Do not reprogram affinitiy on ASP chip
parisc: Drop linux/kernel.h include from asm/bug.h header
parisc: remove unneeded semicolon in perf_regs.c
parisc: entry.S: fix space adjustment on interruption for 64-bit userspace
parisc: entry: set W bit for !compat tasks in syscall_restore_rfi()
parisc: Drop padding fields and layers entries from inventory log
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
- "panic: sys_info: Refactor and fix a potential issue" (Andy Shevchenko)
fixes a build issue and does some cleanup in ib/sys_info.c
- "Implement mul_u64_u64_div_u64_roundup()" (David Laight)
enhances the 64-bit math code on behalf of a PWM driver and beefs up
the test module for these library functions
- "scripts/gdb/symbols: make BPF debug info available to GDB" (Ilya Leoshkevich)
makes BPF symbol names, sizes, and line numbers available to the GDB
debugger
- "Enable hung_task and lockup cases to dump system info on demand" (Feng Tang)
adds a sysctl which can be used to cause additional info dumping when
the hung-task and lockup detectors fire
- "lib/base64: add generic encoder/decoder, migrate users" (Kuan-Wei Chiu)
adds a general base64 encoder/decoder to lib/ and migrates several
users away from their private implementations
- "rbree: inline rb_first() and rb_last()" (Eric Dumazet)
makes TCP a little faster
- "liveupdate: Rework KHO for in-kernel users" (Pasha Tatashin)
reworks the KEXEC Handover interfaces in preparation for Live Update
Orchestrator (LUO), and possibly for other future clients
- "kho: simplify state machine and enable dynamic updates" (Pasha Tatashin)
increases the flexibility of KEXEC Handover. Also preparation for LUO
- "Live Update Orchestrator" (Pasha Tatashin)
is a major new feature targeted at cloud environments. Quoting the
cover letter:
This series introduces the Live Update Orchestrator, a kernel
subsystem designed to facilitate live kernel updates using a
kexec-based reboot. This capability is critical for cloud
environments, allowing hypervisors to be updated with minimal
downtime for running virtual machines. LUO achieves this by
preserving the state of selected resources, such as memory,
devices and their dependencies, across the kernel transition.
As a key feature, this series includes support for preserving
memfd file descriptors, which allows critical in-memory data, such
as guest RAM or any other large memory region, to be maintained in
RAM across the kexec reboot.
Mike Rappaport merits a mention here, for his extensive review and
testing work.
- "kexec: reorganize kexec and kdump sysfs" (Sourabh Jain)
moves the kexec and kdump sysfs entries from /sys/kernel/ to
/sys/kernel/kexec/ and adds back-compatibility symlinks which can
hopefully be removed one day
- "kho: fixes for vmalloc restoration" (Mike Rapoport)
fixes a BUG which was being hit during KHO restoration of vmalloc()
regions
* tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (139 commits)
calibrate: update header inclusion
Reinstate "resource: avoid unnecessary lookups in find_next_iomem_res()"
vmcoreinfo: track and log recoverable hardware errors
kho: fix restoring of contiguous ranges of order-0 pages
kho: kho_restore_vmalloc: fix initialization of pages array
MAINTAINERS: TPM DEVICE DRIVER: update the W-tag
init: replace simple_strtoul with kstrtoul to improve lpj_setup
KHO: fix boot failure due to kmemleak access to non-PRESENT pages
Documentation/ABI: new kexec and kdump sysfs interface
Documentation/ABI: mark old kexec sysfs deprecated
kexec: move sysfs entries to /sys/kernel/kexec
test_kho: always print restore status
kho: free chunks using free_page() instead of kfree()
selftests/liveupdate: add kexec test for multiple and empty sessions
selftests/liveupdate: add simple kexec-based selftest for LUO
selftests/liveupdate: add userspace API selftests
docs: add documentation for memfd preservation via LUO
mm: memfd_luo: allow preserving memfd
liveupdate: luo_file: add private argument to store runtime state
mm: shmem: export some functions to internal.h
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Miscellaneous documentation fixes"
* tag 'x86-urgent-2025-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/boot/Documentation: Prefix hexadecimal literals with 0x
x86/boot/Documentation: Spell 'ID' consistently
x86/platform: Fix and extend kernel-doc comments in <asm/x86_init.h>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool fixes from Ingo Molnar:
"Address various objtool scalability bugs/inefficiencies exposed by
allmodconfig builds, plus improve the quality of alternatives
instructions generated code and disassembly"
* tag 'objtool-urgent-2025-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Simplify .annotate_insn code generation output some more
objtool: Add more robust signal error handling, detect and warn about stack overflows
objtool: Remove newlines and tabs from annotation macros
objtool: Consolidate annotation macros
x86/asm: Remove ANNOTATE_DATA_SPECIAL usage
x86/alternative: Remove ANNOTATE_DATA_SPECIAL usage
objtool: Fix stack overflow in validate_branch()
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git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
Pull dma-mapping updates from Marek Szyprowski:
- More DMA mapping API refactoring to physical addresses as the primary
interface instead of page+offset parameters.
This time dma_map_ops callbacks are converted to physical addresses,
what in turn results also in some simplification of architecture
specific code (Leon Romanovsky and Jason Gunthorpe)
- Clarify that dma_map_benchmark is not a kernel self-test, but
standalone tool (Qinxin Xia)
* tag 'dma-mapping-6.19-2025-12-05' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux:
dma-mapping: remove unused map_page callback
xen: swiotlb: Convert mapping routine to rely on physical address
x86: Use physical address for DMA mapping
sparc: Use physical address DMA mapping
powerpc: Convert to physical address DMA mapping
parisc: Convert DMA map_page to map_phys interface
MIPS/jazzdma: Provide physical address directly
alpha: Convert mapping routine to rely on physical address
dma-mapping: remove unused mapping resource callbacks
xen: swiotlb: Switch to physical address mapping callbacks
ARM: dma-mapping: Switch to physical address mapping callbacks
ARM: dma-mapping: Reduce struct page exposure in arch_sync_dma*()
dma-mapping: convert dummy ops to physical address mapping
dma-mapping: prepare dma_map_ops to conversion to physical address
tools/dma: move dma_map_benchmark from selftests to tools/dma
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Pull bitmap updates from Yury Norov:
- Runtime field_{get,prep}() (Geert)
- Rust ID pool updates (Alice)
- min_t() simplification (David)
- __sw_hweightN kernel-doc fixes (Andy)
- cpumask.h headers cleanup (Andy)
* tag 'bitmap-for-6.19' of github.com:/norov/linux: (32 commits)
rust_binder: use bitmap for allocation of handles
rust: id_pool: do not immediately acquire new ids
rust: id_pool: do not supply starting capacity
rust: id_pool: rename IdPool::new() to with_capacity()
rust: bitmap: add BitmapVec::new_inline()
rust: bitmap: add MAX_LEN and MAX_INLINE_LEN constants
cpumask: Don't use "proxy" headers
soc: renesas: Use bitfield helpers
clk: renesas: Use bitfield helpers
ALSA: usb-audio: Convert to common field_{get,prep}() helpers
soc: renesas: rz-sysc: Convert to common field_get() helper
pinctrl: ma35: Convert to common field_{get,prep}() helpers
iio: mlx90614: Convert to common field_{get,prep}() helpers
iio: dac: Convert to common field_prep() helper
gpio: aspeed: Convert to common field_{get,prep}() helpers
EDAC/ie31200: Convert to common field_get() helper
crypto: qat - convert to common field_get() helper
clk: at91: Convert to common field_{get,prep}() helpers
bitfield: Add non-constant field_{prep,get}() helpers
bitfield: Add less-checking __FIELD_{GET,PREP}()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core updates from Danilo Krummrich:
"Arch Topology:
- Move parse_acpi_topology() from arm64 to common code for reuse in
RISC-V
CPU:
- Expose housekeeping CPUs through /sys/devices/system/cpu/housekeeping
- Print a newline (or 0x0A) instead of '(null)' reading
/sys/devices/system/cpu/nohz_full when nohz_full= is not set
debugfs
- Remove (broken) 'no-mount' mode
- Remove redundant access mode checks in debugfs_get_tree() and
debugfs_create_*() functions
Devres:
- Remove unused devm_free_percpu() helper
- Move devm_alloc_percpu() from device.h to devres.h
Firmware Loader:
- Replace simple_strtol() with kstrtoint()
- Do not call cancel_store() when no upload is in progress
kernfs:
- Increase struct super_block::maxbytes to MAX_LFS_FILESIZE
- Fix a missing unwind path in __kernfs_new_node()
Misc:
- Increase the name size in struct auxiliary_device_id to 40
characters
- Replace system_unbound_wq with system_dfl_wq and add WQ_PERCPU to
alloc_workqueue()
Platform:
- Replace ERR_PTR() with IOMEM_ERR_PTR() in platform ioremap
functions
Rust:
- Auxiliary:
- Unregister auxiliary device on parent device unbind
- Move parent() to impl Device; implement device context aware
parent() for Device<Bound>
- Illustrate how to safely obtain a driver's device private data
when calling from an auxiliary driver into the parant device
driver
- DebugFs:
- Implement support for binary large objects
- Device:
- Let probe() return the driver's device private data as pinned
initializer, i.e. impl PinInit<Self, Error>
- Implement safe accessor for a driver's device private data for
Device<Bound> (returned reference can't out-live driver binding
and guarantees the correct private data type)
- Implement AsBusDevice trait, to be used by class device
abstractions to derive the bus device type of the parent device
- DMA:
- Store raw pointer of allocation as NonNull
- Use start_ptr() and start_ptr_mut() to inherit correct
mutability of self
- FS:
- Add file::Offset type alias
- I2C:
- Add abstractions for I2C device / driver infrastructure
- Implement abstractions for manual I2C device registrations
- I/O:
- Use "kernel vertical" style for imports
- Define ResourceSize as resource_size_t
- Move ResourceSize to top-level I/O module
- Add type alias for phys_addr_t
- Implement Rust version of read_poll_timeout_atomic()
- PCI:
- Use "kernel vertical" style for imports
- Move I/O and IRQ infrastructure to separate files
- Add support for PCI interrupt vectors
- Implement TryInto<IrqRequest<'a>> for IrqVector<'a> to convert
an IrqVector bound to specific pci::Device into an IrqRequest
bound to the same pci::Device's parent Device
- Leverage pin_init_scope() to get rid of redundant Result in IRQ
methods
- PinInit:
- Add {pin_}init_scope() to execute code before creating an
initializer
- Platform:
- Leverage pin_init_scope() to get rid of redundant Result in IRQ
methods
- Timekeeping:
- Implement abstraction of udelay()
- Uaccess:
- Implement read_slice_partial() and read_slice_file() for
UserSliceReader
- Implement write_slice_partial() and write_slice_file() for
UserSliceWriter
sysfs:
- Prepare the constification of struct attribute"
* tag 'driver-core-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (75 commits)
rust: pci: fix build failure when CONFIG_PCI_MSI is disabled
debugfs: Fix default access mode config check
debugfs: Remove broken no-mount mode
debugfs: Remove redundant access mode checks
driver core: Check drivers_autoprobe for all added devices
driver core: WQ_PERCPU added to alloc_workqueue users
driver core: replace use of system_unbound_wq with system_dfl_wq
tick/nohz: Expose housekeeping CPUs in sysfs
tick/nohz: avoid showing '(null)' if nohz_full= not set
sysfs/cpu: Use DEVICE_ATTR_RO for nohz_full attribute
kernfs: fix memory leak of kernfs_iattrs in __kernfs_new_node
fs/kernfs: raise sb->maxbytes to MAX_LFS_FILESIZE
mod_devicetable: Bump auxiliary_device_id name size
sysfs: simplify attribute definition macros
samples/kobject: constify 'struct foo_attribute'
samples/kobject: add is_visible() callback to attribute group
sysfs: attribute_group: enable const variants of is_visible()
sysfs: introduce __SYSFS_FUNCTION_ALTERNATIVE()
sysfs: transparently handle const pointers in ATTRIBUTE_GROUPS()
sysfs: attribute_group: allow registration of const attribute
...
|
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Most common macros are defined in asm.h, asmmacro.h and stackframe.h.
Adjust these macros for both 32BIT and 64BIT.
Add SETUP_TWINS (Setup Trampoline Windows) and SETUP_MODES (Setup CRMD/
PRMD/EUEN) which will be used later.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
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32BIT platforms only have 32bit CSR/IOCSR registers, 64BIT platforms
have both 32bit/64bit CSR/IOCSR registers. Now there are both 32bit and
64bit CSR accessors:
csr_read32()/csr_write32()/csr_xchg32();
csr_read64()/csr_write64()/csr_xchg64();
Some CSR registers (address and timer registers) are 32bit length on
32BIT platform and 64bit length on 64BIT platform. To avoid #ifdefs here
and there, they need adaptive accessors, so we define and use:
csr_read()/csr_write()/csr_xchg();
IOCSR doesn't have a "natural length", which means a 64bit register can
be treated as two 32bit registers, so we just use two 32bit accessors to
emulate a 64bit accessors.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
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LoongArch64 has both AMO and LL/SC instructions, while LoongArch32 only
has LL/SC intstructions. So we add a Kconfig option CPU_HAS_AMO here and
implement atomic operations (also including local operations and percpu
operations) for both 32BIT and 64BIT platforms.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
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Loongson-2K3000 has a new PCI ID (0x7a46) for its display controller,
Add it for pci_fixup_vgadev() since we prefer a discrete graphics card
as default boot device if present.
Cc: stable@vger.kernel.org
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
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Add and use some macros for AVEC interrupt controller, instead of using
magic numbers.
Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
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For thread_count, the current calculation method has a maximum of 255,
which may not be sufficient in the future. Therefore, we are correcting
it now.
Reference: SMBIOS Specification, 7.5 Processor Information (Type 4)[1]
[1]: https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.9.0.pdf
Cc: stable@vger.kernel.org
Signed-off-by: Qiang Ma <maqianga@uniontech.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
|
It is better to use unsigned long rather than long for _end and _text to
calculate the kernel length.
Cc: stable@vger.kernel.org # v6.3+
Fixes: e5f02b51fa0c ("LoongArch: Add support for kernel address space layout randomization (KASLR)")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
|
The __pmd() and __pte() helper macros provide the correct initialization
syntax and abstraction for the pmd_t and pte_t types.
Use __pmd() to fix follow warning about __swp_entry_to_pmd() with gcc-15
under specific configs [1] :
In file included from ./include/linux/pgtable.h:6,
from ./include/linux/mm.h:31,
from ./include/linux/pagemap.h:8,
from arch/loongarch/mm/init.c:14:
./include/linux/swapops.h: In function ‘swp_entry_to_pmd’:
./arch/loongarch/include/asm/pgtable.h:302:34: error: missing braces around initializer [-Werror=missing-braces]
302 | #define __swp_entry_to_pmd(x) ((pmd_t) { (x).val | _PAGE_HUGE })
| ^
./include/linux/swapops.h:559:16: note: in expansion of macro ‘__swp_entry_to_pmd’
559 | return __swp_entry_to_pmd(arch_entry);
| ^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
Also update __swp_entry_to_pte() to use __pte() for consistency.
[1]. https://download.01.org/0day-ci/archive/20251119/202511190316.luI90kAo-lkp@intel.com/config
Cc: stable@vger.kernel.org
Signed-off-by: Yuli Wang <wangyl5933@chinaunicom.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
|
Now the optimized version of arch_dup_task_struct() for LoongArch
assumes 'thread' is the last member of 'task_struct'. But this is
not true if CONFIG_RANDSTRUCT is enabled after Linux-6.16.
So fix the arch_dup_task_struct() function for CONFIG_RANDSTRUCT by
copying the whole 'task_struct'.
Cc: stable@vger.kernel.org # 6.16+
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
|
When CONFIG_RANDSTRUCT enabled, members of task_struct are randomized.
There is a chance that TASK_STACK_CANARY be out of 12bit immediate's
range and causes build errors. TASK_STACK_CANARY is naturally aligned,
so fix it by replacing ld.d/st.d with ldptr.d/stptr.d which have 14bit
immediates.
Cc: stable@vger.kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202511240656.0NaPcJs1-lkp@intel.com/
Suggested-by: Rui Wang <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
|
LoongArch has the bitrev.w instruction to reverse bits in a 32-bit
integer, thus there's no need to reverse the bytes and use bitrev.4b.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
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Without HAVE_ARCH_BITREVERSE, the architecture-optimized bit reverse
implementations in arch/loongarch/include/asm/bitrev.h are not used at
all.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull more SoC driver updates from Arnd Bergmann:
"These updates came a little late, or were based on a later 6.18-rc tag
than the others:
- A new driver for cache management on cxl devices with memory shared
in a coherent cluster. This is part of the drivers/cache/ tree, but
unlike the other drivers that back the dma-mapping interfaces, this
one is needed only during CPU hotplug.
- A shared branch for reset controllers using swnode infrastructure
- Added support for new SoC variants in the Amlogic soc_device
identification
- Minor updates in Freescale, Microchip, Samsung, and Apple SoC
drivers"
* tag 'soc-drivers-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (24 commits)
soc: samsung: exynos-pmu: fix device leak on regmap lookup
soc: samsung: exynos-pmu: Fix structure initialization
soc: fsl: qbman: use kmalloc_array() instead of kmalloc()
soc: fsl: qbman: add WQ_PERCPU to alloc_workqueue users
MAINTAINERS: Update email address for Christophe Leroy
MAINTAINERS: refer to intended file in STANDALONE CACHE CONTROLLER DRIVERS
cache: Support cache maintenance for HiSilicon SoC Hydra Home Agent
cache: Make top level Kconfig menu a boolean dependent on RISCV
MAINTAINERS: Add Jonathan Cameron to drivers/cache and add lib/cache_maint.c + header
arm64: Select GENERIC_CPU_CACHE_MAINTENANCE
lib: Support ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION
soc: amlogic: meson-gx-socinfo: add new SoCs id
dt-bindings: arm: amlogic: meson-gx-ao-secure: support more SoCs
memregion: Support fine grained invalidate by cpu_cache_invalidate_memregion()
memregion: Drop unused IORES_DESC_* parameter from cpu_cache_invalidate_memregion()
dt-bindings: cache: sifive,ccache0: add a pic64gx compatible
MAINTAINERS: rename Microchip RISC-V entry
MAINTAINERS: add new soc drivers to Microchip RISC-V entry
soc: microchip: add mfd drivers for two syscon regions on PolarFire SoC
dt-bindings: soc: microchip: document the simple-mfd syscon on PolarFire SoC
...
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC driver updates from Arnd Bergmann:
"This is the first half of the driver changes:
- A treewide interface change to the "syscore" operations for power
management, as a preparation for future Tegra specific changes
- Reset controller updates with added drivers for LAN969x, eic770 and
RZ/G3S SoCs
- Protection of system controller registers on Renesas and Google
SoCs, to prevent trivially triggering a system crash from e.g.
debugfs access
- soc_device identification updates on Nvidia, Exynos and Mediatek
- debugfs support in the ST STM32 firewall driver
- Minor updates for SoC drivers on AMD/Xilinx, Renesas, Allwinner, TI
- Cleanups for memory controller support on Nvidia and Renesas"
* tag 'soc-drivers-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (114 commits)
memory: tegra186-emc: Fix missing put_bpmp
Documentation: reset: Remove reset_controller_add_lookup()
reset: fix BIT macro reference
reset: rzg2l-usbphy-ctrl: Fix a NULL vs IS_ERR() bug in probe
reset: th1520: Support reset controllers in more subsystems
reset: th1520: Prepare for supporting multiple controllers
dt-bindings: reset: thead,th1520-reset: Add controllers for more subsys
dt-bindings: reset: thead,th1520-reset: Remove non-VO-subsystem resets
reset: remove legacy reset lookup code
clk: davinci: psc: drop unused reset lookup
reset: rzg2l-usbphy-ctrl: Add support for RZ/G3S SoC
reset: rzg2l-usbphy-ctrl: Add support for USB PWRRDY
dt-bindings: reset: renesas,rzg2l-usbphy-ctrl: Document RZ/G3S support
reset: eswin: Add eic7700 reset driver
dt-bindings: reset: eswin: Documentation for eic7700 SoC
reset: sparx5: add LAN969x support
dt-bindings: reset: microchip: Add LAN969x support
soc: rockchip: grf: Add select correct PWM implementation on RK3368
soc/tegra: pmc: Add USB wake events for Tegra234
amba: tegra-ahb: Fix device leak on SMMU enable
...
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull new SoC families update from Arnd Bergmann:
"These three new families of SoC are split out into a separate branch
because they touch multiple parts of the source tree and are better
left separate for the initial merge.
- Black Sesame Technologies C1200 is an automotive SoC using
Cortex-A78 CPU cores
- Anlogic dr1v90 (not to be confused with Amlogic) is an FPGA
platform using a single nuclei ux900 RISC-V core
- Tenstorrent Blackhole is a Neural Processing Unit using custom
"Tensix" cores for computation offload managed by Linux running on
SiFive X280 RISC-V cores.
Support for all three is rather rudimentary at the moment and will get
improved as device drivers are merged through other tree"
* tag 'soc-newsoc-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (24 commits)
MAINTAINERS: add Black Sesame Technologies (BST) ARM SoC support
arm64: defconfig: enable BST platform support
arm64: dts: bst: add support for Black Sesame Technologies C1200 CDCU1.0 board
arm64: Kconfig: add ARCH_BST for Black Sesame Technologies SoCs
dt-bindings: arm: add Black Sesame Technologies (bst) SoC
dt-bindings: vendor-prefixes: Add Black Sesame Technologies Co., Ltd.
MAINTAINERS: Setup support for Anlogic tree
riscv: defconfig: Enable Anlogic SoC
riscv: dts: anlogic: Add Milianke MLKPAI FS01 board
riscv: dts: Add initial Anlogic DR1V90 SoC device tree
riscv: Add Anlogic SoC famly Kconfig support
dt-bindings: serial: snps-dw-apb-uart: Add Anlogic DR1V90 uart
dt-bindings: timer: Add Anlogic DR1V90 ACLINT MTIMER
dt-bindings: riscv: Add Anlogic DR1V90
dt-bindings: riscv: Add Nuclei UX900 compatibles
dt-bindings: vendor-prefixes: Add Anlogic, Milianke and Nuclei
riscv: defconfig: Enable Tenstorrent SoCs
riscv: Kconfig.socs: Add ARCH_TENSTORRENT for Tenstorrent SoCs
riscv: dts: Add Tenstorrent Blackhole SoC PCIe cards
dt-bindings: interrupt-controller: Add Tenstorrent Blackhole compatible
...
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Pull SoC devicetree updates from Arnd Bergmann:
"Three new SoCs got added in existing arm64 chip families:
- Renesas R-Car X5H (R8A78000) is a new generation of automotive
SoCs, based on 16 Cortex-A720 (Armv9.2) cores, which makes the the
currently highest-perforance embedded SoC.
- TI AM62L is a new variant of the AM62 family of industrial SoCs,
this one comes without a GPU.
- Qualcomm MSM8937 (Snapdragon 430) is an older mobile phone chip
based on Cortex-A53, and closely related to MSM8917 (Snapdragn
425), which we already support.
In addition, there are a good number of newly supported machines
across SoC families:
- Two Aspeed AST2600 (Cortex-A7) based BMC setups for large servers
- Mobile Phones and tables based on Mediatek MT6582, Nvidia Tegra124,
Qualcomm MSM8937 and Qualcomm MSM8939,
- Two Laptops based on Qualcomm SoCs: one using the older sdm850, the
other using x1p42100.
- One Router based on Rockchips RK3568
- 24 variants of the Enclustra Mercury system-on-module, all based on
32-bit Intel/Altera SocFPGA chips, plus two boards using 64-bit
SocFPGA Agilex chips..
- 30 industrial/embedded boards and single-board computers, using
various chips from NXP, Rockchips, Mediatek, TI, Amlogic, Qualcomm,
Spacemit, and Starfive.
In total there are 783 commits here, the majority of these improving
hardware support and cleaning up devicetree files across the tree,
with the majority of the changes going into the Qualcomm, NXP, Renesas
and Rockchips platforms"
* tag 'soc-dt-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (782 commits)
arm64: dts: mediatek: mt8195: Fix address range for JPEG decoder core 1
ARM: dts: samsung: exynos4412-midas: turn off SDIO WLAN chip during system suspend
ARM: dts: samsung: exynos4210-trats: turn off SDIO WLAN chip during system suspend
ARM: dts: samsung: exynos4210-i9100: turn off SDIO WLAN chip during system suspend
ARM: dts: samsung: universal_c210: turn off SDIO WLAN chip during system suspend
arm64: dts: amlogic: meson-g12b: Fix L2 cache reference for S922X CPUs
arm64: dts: Add gpio_intc node for Amlogic S7D SoCs
arm64: dts: Add gpio_intc node for Amlogic S7 SoCs
arm64: dts: Add gpio_intc node for Amlogic S6 SoCs
arm64: dts: amlogic: s7d: add ao secure node
arm64: dts: amlogic: s7: add ao secure node
arm64: dts: amlogic: s6: add ao secure node
arm64: dts: amlogic: Fix the register name of the 'DBI' region
dts: arm64: amlogic: add a5 pinctrl node
arm64: dts: amlogic: s7d: add power domain controller node
arm64: dts: amlogic: s7: add power domain controller node
arm64: dts: amlogic: s6: add power domain controller node
dts: arm64: amlogic: Add ISP related nodes for C3
arm64: dts: meson: add initial device-tree for Tanix TX9 Pro
dt-bindings: arm: amlogic: add support for Tanix TX9 Pro
...
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC ARM code updates from Arnd Bergmann:
"These are very minimal changes for 32-bit Arm platform code, enabling
SMP bringup for one more SoC variant (mt6582) among spelling changes
and a build warning fix"
* tag 'soc-arm-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
ARM: omap1: avoid symbol clashes in fiq handler
ARM: gemini: fix typos in comments
ARM: versatile: Fix typo in versatile.c
ARM: OMAP2+: Fix falg->flag typo in omap_smc2()
ARM: mediatek: add MT6582 smp bring up code
ARM: mediatek: add board_dt_compat entry for the MT6582 SoC
|
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC defconfig updates from Arnd Bergmann:
"As usual, a number of newly added drivers get enabled in the arm64
defconfig, in addition to minor housekeeping work on defconfig files
for arm32, arm64 and riscv"
* tag 'soc-defconfig-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (24 commits)
arm64: defconfig: enable Exynos ACPM clocks
arm64: defconfig: Remove the redundant SCHED_MC/SCHED_SMT
ARM: multi_v7_defconfig: Enable TI PRU Ethernet driver
arm64: defconfig: enable i.MX AIPSTZ driver
ARM: mxs_defconfig: enable sound drivers for imx28-amarula-rmm
arm64: defconfig: Enable i.MX95 drivers for pinctrl, Ethernet and PCIe
arm64: defconfig: enable rockchip camera interface
ARM: tegra: Enable EXT4 for Tegra
arm64: defconfig: Enable NVIDIA VRS PSEQ RTC
arm64: defconfig: Enable SX150x GPIO expander driver
riscv: defconfig: enable SPI_FSL_QUADSPI as a module
ARM: at91: at91_dt_defconfig: set MMC_SPI to module
arm64: defconfig: Build NSS clock controller driver for IPQ5424
arm64: defconfig: Enable SCSI UFS Crypto and Block Inline encryption drivers
arm64: defconfig: Add M31 eUSB2 PHY config
arm64: defconfig: Enable configs for Fairphone 3, 4, 5 smartphones
arm64: defconfig: Enable two Novatek display panels for MTP8750 and Tianma
arm64: defconfig: Enable RZ/T2H / RZ/N2H ADC driver
ARM: shmobile: defconfig: Refresh for v6.18-rc1
arm64: defconfig: Enable DW HDMI QP CEC support
...
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Pull KVM updates from Paolo Bonzini:
"ARM:
- Support for userspace handling of synchronous external aborts
(SEAs), allowing the VMM to potentially handle the abort in a
non-fatal manner
- Large rework of the VGIC's list register handling with the goal of
supporting more active/pending IRQs than available list registers
in hardware. In addition, the VGIC now supports EOImode==1 style
deactivations for IRQs which may occur on a separate vCPU than the
one that acked the IRQ
- Support for FEAT_XNX (user / privileged execute permissions) and
FEAT_HAF (hardware update to the Access Flag) in the software page
table walkers and shadow MMU
- Allow page table destruction to reschedule, fixing long
need_resched latencies observed when destroying a large VM
- Minor fixes to KVM and selftests
Loongarch:
- Get VM PMU capability from HW GCFG register
- Add AVEC basic support
- Use 64-bit register definition for EIOINTC
- Add KVM timer test cases for tools/selftests
RISC/V:
- SBI message passing (MPXY) support for KVM guest
- Give a new, more specific error subcode for the case when in-kernel
AIA virtualization fails to allocate IMSIC VS-file
- Support KVM_DIRTY_LOG_INITIALLY_SET, enabling dirty log gradually
in small chunks
- Fix guest page fault within HLV* instructions
- Flush VS-stage TLB after VCPU migration for Andes cores
s390:
- Always allocate ESCA (Extended System Control Area), instead of
starting with the basic SCA and converting to ESCA with the
addition of the 65th vCPU. The price is increased number of exits
(and worse performance) on z10 and earlier processor; ESCA was
introduced by z114/z196 in 2010
- VIRT_XFER_TO_GUEST_WORK support
- Operation exception forwarding support
- Cleanups
x86:
- Skip the costly "zap all SPTEs" on an MMIO generation wrap if MMIO
SPTE caching is disabled, as there can't be any relevant SPTEs to
zap
- Relocate a misplaced export
- Fix an async #PF bug where KVM would clear the completion queue
when the guest transitioned in and out of paging mode, e.g. when
handling an SMI and then returning to paged mode via RSM
- Leave KVM's user-return notifier registered even when disabling
virtualization, as long as kvm.ko is loaded. On reboot/shutdown,
keeping the notifier registered is ok; the kernel does not use the
MSRs and the callback will run cleanly and restore host MSRs if the
CPU manages to return to userspace before the system goes down
- Use the checked version of {get,put}_user()
- Fix a long-lurking bug where KVM's lack of catch-up logic for
periodic APIC timers can result in a hard lockup in the host
- Revert the periodic kvmclock sync logic now that KVM doesn't use a
clocksource that's subject to NTP corrections
- Clean up KVM's handling of MMIO Stale Data and L1TF, and bury the
latter behind CONFIG_CPU_MITIGATIONS
- Context switch XCR0, XSS, and PKRU outside of the entry/exit fast
path; the only reason they were handled in the fast path was to
paper of a bug in the core #MC code, and that has long since been
fixed
- Add emulator support for AVX MOV instructions, to play nice with
emulated devices whose guest drivers like to access PCI BARs with
large multi-byte instructions
x86 (AMD):
- Fix a few missing "VMCB dirty" bugs
- Fix the worst of KVM's lack of EFER.LMSLE emulation
- Add AVIC support for addressing 4k vCPUs in x2AVIC mode
- Fix incorrect handling of selective CR0 writes when checking
intercepts during emulation of L2 instructions
- Fix a currently-benign bug where KVM would clobber SPEC_CTRL[63:32]
on VMRUN and #VMEXIT
- Fix a bug where KVM corrupt the guest code stream when re-injecting
a soft interrupt if the guest patched the underlying code after the
VM-Exit, e.g. when Linux patches code with a temporary INT3
- Add KVM_X86_SNP_POLICY_BITS to advertise supported SNP policy bits
to userspace, and extend KVM "support" to all policy bits that
don't require any actual support from KVM
x86 (Intel):
- Use the root role from kvm_mmu_page to construct EPTPs instead of
the current vCPU state, partly as worthwhile cleanup, but mostly to
pave the way for tracking per-root TLB flushes, and elide EPT
flushes on pCPU migration if the root is clean from a previous
flush
- Add a few missing nested consistency checks
- Rip out support for doing "early" consistency checks via hardware
as the functionality hasn't been used in years and is no longer
useful in general; replace it with an off-by-default module param
to WARN if hardware fails a check that KVM does not perform
- Fix a currently-benign bug where KVM would drop the guest's
SPEC_CTRL[63:32] on VM-Enter
- Misc cleanups
- Overhaul the TDX code to address systemic races where KVM (acting
on behalf of userspace) could inadvertantly trigger lock contention
in the TDX-Module; KVM was either working around these in weird,
ugly ways, or was simply oblivious to them (though even Yan's
devilish selftests could only break individual VMs, not the host
kernel)
- Fix a bug where KVM could corrupt a vCPU's cpu_list when freeing a
TDX vCPU, if creating said vCPU failed partway through
- Fix a few sparse warnings (bad annotation, 0 != NULL)
- Use struct_size() to simplify copying TDX capabilities to userspace
- Fix a bug where TDX would effectively corrupt user-return MSR
values if the TDX Module rejects VP.ENTER and thus doesn't clobber
host MSRs as expected
Selftests:
- Fix a math goof in mmu_stress_test when running on a single-CPU
system/VM
- Forcefully override ARCH from x86_64 to x86 to play nice with
specifying ARCH=x86_64 on the command line
- Extend a bunch of nested VMX to validate nested SVM as well
- Add support for LA57 in the core VM_MODE_xxx macro, and add a test
to verify KVM can save/restore nested VMX state when L1 is using
5-level paging, but L2 is not
- Clean up the guest paging code in anticipation of sharing the core
logic for nested EPT and nested NPT
guest_memfd:
- Add NUMA mempolicy support for guest_memfd, and clean up a variety
of rough edges in guest_memfd along the way
- Define a CLASS to automatically handle get+put when grabbing a
guest_memfd from a memslot to make it harder to leak references
- Enhance KVM selftests to make it easer to develop and debug
selftests like those added for guest_memfd NUMA support, e.g. where
test and/or KVM bugs often result in hard-to-debug SIGBUS errors
- Misc cleanups
Generic:
- Use the recently-added WQ_PERCPU when creating the per-CPU
workqueue for irqfd cleanup
- Fix a goof in the dirty ring documentation
- Fix choice of target for directed yield across different calls to
kvm_vcpu_on_spin(); the function was always starting from the first
vCPU instead of continuing the round-robin search"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (260 commits)
KVM: arm64: at: Update AF on software walk only if VM has FEAT_HAFDBS
KVM: arm64: at: Use correct HA bit in TCR_EL2 when regime is EL2
KVM: arm64: Document KVM_PGTABLE_PROT_{UX,PX}
KVM: arm64: Fix spelling mistake "Unexpeced" -> "Unexpected"
KVM: arm64: Add break to default case in kvm_pgtable_stage2_pte_prot()
KVM: arm64: Add endian casting to kvm_swap_s[12]_desc()
KVM: arm64: Fix compilation when CONFIG_ARM64_USE_LSE_ATOMICS=n
KVM: arm64: selftests: Add test for AT emulation
KVM: arm64: nv: Expose hardware access flag management to NV guests
KVM: arm64: nv: Implement HW access flag management in stage-2 SW PTW
KVM: arm64: Implement HW access flag management in stage-1 SW PTW
KVM: arm64: Propagate PTW errors up to AT emulation
KVM: arm64: Add helper for swapping guest descriptor
KVM: arm64: nv: Use pgtable definitions in stage-2 walk
KVM: arm64: Handle endianness in read helper for emulated PTW
KVM: arm64: nv: Stop passing vCPU through void ptr in S2 PTW
KVM: arm64: Call helper for reading descriptors directly
KVM: arm64: nv: Advertise support for FEAT_XNX
KVM: arm64: Teach ptdump about FEAT_XNX permissions
KVM: s390: Use generic VIRT_XFER_TO_GUEST_WORK functions
...
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git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux
Pull UML updates from Johannes Berg:
"Apart from the usual small churn, we have
- initial SMP support (only kernel)
- major vDSO cleanups (and fixes for 32-bit)"
* tag 'uml-for-linux-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: (33 commits)
um: Disable KASAN_INLINE when STATIC_LINK is selected
um: Don't rename vmap to kernel_vmap
um: drivers: virtio: use string choices helper
um: Always set up AT_HWCAP and AT_PLATFORM
x86/um: Remove FIXADDR_USER_START and FIXADDR_USE_END
um: Remove __access_ok_vsyscall()
um: Remove redundant range check from __access_ok_vsyscall()
um: Remove fixaddr_user_init()
x86/um: Drop gate area handling
x86/um: Do not inherit vDSO from host
um: Split out default elf_aux_hwcap
x86/um: Move ELF_PLATFORM fallback to x86-specific code
um: Split out default elf_aux_platform
um: Avoid circular dependency on asm-offsets in pgtable.h
um: Enable SMP support on x86
asm-generic: percpu: Add assembly guard
um: vdso: Remove getcpu support on x86
um: Add initial SMP support
um: Define timers on a per-CPU basis
um: Determine sleep based on need_resched()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Paul Walmsley:
- Enable parallel hotplug for RISC-V
- Optimize vector regset allocation for ptrace()
- Add a kernel selftest for the vector ptrace interface
- Enable the userspace RAID6 test to build and run using RISC-V vectors
- Add initial support for the Zalasr RISC-V ratified ISA extension
- For the Zicbop RISC-V ratified ISA extension to userspace, expose
hardware and kernel support to userspace and add a kselftest for
Zicbop
- Convert open-coded instances of 'asm goto's that are controlled by
runtime ALTERNATIVEs to use riscv_has_extension_{un,}likely(),
following arm64's alternative_has_cap_{un,}likely()
- Remove an unnecessary mask in the GFP flags used in some calls to
pagetable_alloc()
* tag 'riscv-for-linus-6.19-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
selftests/riscv: Add Zicbop prefetch test
riscv: hwprobe: Expose Zicbop extension and its block size
riscv: Introduce Zalasr instructions
riscv: hwprobe: Export Zalasr extension
dt-bindings: riscv: Add Zalasr ISA extension description
riscv: Add ISA extension parsing for Zalasr
selftests: riscv: Add test for the Vector ptrace interface
riscv: ptrace: Optimize the allocation of vector regset
raid6: test: Add support for RISC-V
raid6: riscv: Allow code to be compiled in userspace
raid6: riscv: Prevent compiler from breaking inline vector assembly code
riscv: cmpxchg: Use riscv_has_extension_likely
riscv: bitops: Use riscv_has_extension_likely
riscv: hweight: Use riscv_has_extension_likely
riscv: checksum: Use riscv_has_extension_likely
riscv: pgtable: Use riscv_has_extension_unlikely
riscv: Remove __GFP_HIGHMEM masking
RISC-V: Enable HOTPLUG_PARALLEL for secondary CPUs
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
- Restore clearing of MSR[RI] at interrupt/syscall exit on 32-bit
- Fix unpaired stwcx on interrupt exit on 32-bit
- Fix race condition leading to double list-add in
mac_hid_toggle_emumouse()
- Fix mprotect on book3s 32-bit
- Fix SLB multihit issue during SLB preload with 64-bit hash MMU
- Add support for crashkernel CMA reservation
- Add die_id and die_cpumask for Power10 & later to expose chip
hemispheres
- A series of minor fixes and improvements to the hash SLB code
Thanks to Antonio Alvarez Feijoo, Ben Collins, Bhaskar Chowdhury,
Christophe Leroy, Daniel Thompson, Dave Vasilevsky, Donet Tom,
J. Neuschäfer, Kunwu Chan, Long Li, Naresh Kamboju, Nathan Chancellor,
Ritesh Harjani (IBM), Shirisha G, Shrikanth Hegde, Sourabh Jain, Srikar
Dronamraju, Stephen Rothwell, Thomas Zimmermann, Venkat Rao Bagalkote,
and Vishal Chourasia.
* tag 'powerpc-6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (32 commits)
macintosh/via-pmu-backlight: Include <linux/fb.h> and <linux/of.h>
powerpc/powermac: backlight: Include <linux/of.h>
powerpc/64s/slb: Add no_slb_preload early cmdline param
powerpc/64s/slb: Make preload_add return type as void
powerpc/ptdump: Dump PXX level info for kernel_page_tables
powerpc/64s/pgtable: Enable directMap counters in meminfo for Hash
powerpc/64s/hash: Update directMap page counters for Hash
powerpc/64s/hash: Hash hpt_order should be only available with Hash MMU
powerpc/64s/hash: Improve hash mmu printk messages
powerpc/64s/hash: Fix phys_addr_t printf format in htab_initialize()
powerpc/64s/ptdump: Fix kernel_hash_pagetable dump for ISA v3.00 HPTE format
powerpc/64s/hash: Restrict stress_hpt_struct memblock region to within RMA limit
powerpc/64s/slb: Fix SLB multihit issue during SLB preload
powerpc, mm: Fix mprotect on book3s 32-bit
powerpc/smp: Expose die_id and die_cpumask
powerpc/83xx: Add a null pointer check to mcu_gpiochip_add
arch:powerpc:tools This file was missing shebang line, so added it
kexec: Include kernel-end even without crashkernel
powerpc: p2020: Rename wdt@ nodes to watchdog@
powerpc: 86xx: Rename wdt@ nodes to watchdog@
...
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Root partitions running on MSHV currently attempt ACPI power-off, which
MSHV intercepts and triggers a Machine Check Exception (MCE), leading
to a kernel panic.
Root partitions panic with a trace similar to:
[ 81.306348] reboot: Power down
[ 81.314709] mce: [Hardware Error]: CPU 0: Machine Check Exception: 4 Bank 0: b2000000c0060001
[ 81.314711] mce: [Hardware Error]: TSC 3b8cb60a66 PPIN 11d98332458e4ea9
[ 81.314713] mce: [Hardware Error]: PROCESSOR 0:606a6 TIME 1759339405 SOCKET 0 APIC 0 microcode ffffffff
[ 81.314715] mce: [Hardware Error]: Run the above through 'mcelog --ascii'
[ 81.314716] mce: [Hardware Error]: Machine check: Processor context corrupt
[ 81.314717] Kernel panic - not syncing: Fatal machine check
To avoid this, configure the sleep state in the hypervisor and invoke
the HVCALL_ENTER_SLEEP_STATE hypercall as the final step in the shutdown
sequence. This ensures a clean and safe shutdown of the root partition.
Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Co-developed-by: Anatol Belski <anbelski@linux.microsoft.com>
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@linux.microsoft.com>
Acked-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
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Configure sleep state information from ACPI in MSHV hypervisor using
a reboot notifier. This data allows the hypervisor to correctly power
off the host during shutdown.
Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Co-developed-by: Anatol Belski <anbelski@linux.microsoft.com>
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@linux.microsoft.com>
Reviewed-by: Stansialv Kinsburskii <skinsburskii@linux.miscrosoft.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
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Provide an interface for Virtual Machine Monitor like OpenVMM and its
use as OpenHCL paravisor to control VTL0 (Virtual trust Level).
Expose devices and support IOCTLs for features like VTL creation,
VTL0 memory management, context switch, making hypercalls,
mapping VTL0 address space to VTL2 userspace, getting new VMBus
messages and channel events in VTL2 etc.
Co-developed-by: Roman Kisel <romank@linux.microsoft.com>
Signed-off-by: Roman Kisel <romank@linux.microsoft.com>
Co-developed-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Signed-off-by: Naman Jain <namjain@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull persistent dentry infrastructure and conversion from Al Viro:
"Some filesystems use a kinda-sorta controlled dentry refcount leak to
pin dentries of created objects in dcache (and undo it when removing
those). A reference is grabbed and not released, but it's not actually
_stored_ anywhere.
That works, but it's hard to follow and verify; among other things, we
have no way to tell _which_ of the increments is intended to be an
unpaired one. Worse, on removal we need to decide whether the
reference had already been dropped, which can be non-trivial if that
removal is on umount and we need to figure out if this dentry is
pinned due to e.g. unlink() not done. Usually that is handled by using
kill_litter_super() as ->kill_sb(), but there are open-coded special
cases of the same (consider e.g. /proc/self).
Things get simpler if we introduce a new dentry flag
(DCACHE_PERSISTENT) marking those "leaked" dentries. Having it set
claims responsibility for +1 in refcount.
The end result this series is aiming for:
- get these unbalanced dget() and dput() replaced with new primitives
that would, in addition to adjusting refcount, set and clear
persistency flag.
- instead of having kill_litter_super() mess with removing the
remaining "leaked" references (e.g. for all tmpfs files that hadn't
been removed prior to umount), have the regular
shrink_dcache_for_umount() strip DCACHE_PERSISTENT of all dentries,
dropping the corresponding reference if it had been set. After that
kill_litter_super() becomes an equivalent of kill_anon_super().
Doing that in a single step is not feasible - it would affect too many
places in too many filesystems. It has to be split into a series.
This work has really started early in 2024; quite a few preliminary
pieces have already gone into mainline. This chunk is finally getting
to the meat of that stuff - infrastructure and most of the conversions
to it.
Some pieces are still sitting in the local branches, but the bulk of
that stuff is here"
* tag 'pull-persistency' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (54 commits)
d_make_discardable(): warn if given a non-persistent dentry
kill securityfs_recursive_remove()
convert securityfs
get rid of kill_litter_super()
convert rust_binderfs
convert nfsctl
convert rpc_pipefs
convert hypfs
hypfs: swich hypfs_create_u64() to returning int
hypfs: switch hypfs_create_str() to returning int
hypfs: don't pin dentries twice
convert gadgetfs
gadgetfs: switch to simple_remove_by_name()
convert functionfs
functionfs: switch to simple_remove_by_name()
functionfs: fix the open/removal races
functionfs: need to cancel ->reset_work in ->kill_sb()
functionfs: don't bother with ffs->ref in ffs_data_{opened,closed}()
functionfs: don't abuse ffs_data_closed() on fs shutdown
convert selinuxfs
...
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
"__vmalloc()/kvmalloc() and no-block support" (Uladzislau Rezki)
Rework the vmalloc() code to support non-blocking allocations
(GFP_ATOIC, GFP_NOWAIT)
"ksm: fix exec/fork inheritance" (xu xin)
Fix a rare case where the KSM MMF_VM_MERGE_ANY prctl state is not
inherited across fork/exec
"mm/zswap: misc cleanup of code and documentations" (SeongJae Park)
Some light maintenance work on the zswap code
"mm/page_owner: add debugfs files 'show_handles' and 'show_stacks_handles'" (Mauricio Faria de Oliveira)
Enhance the /sys/kernel/debug/page_owner debug feature by adding
unique identifiers to differentiate the various stack traces so
that userspace monitoring tools can better match stack traces over
time
"mm/page_alloc: pcp->batch cleanups" (Joshua Hahn)
Minor alterations to the page allocator's per-cpu-pages feature
"Improve UFFDIO_MOVE scalability by removing anon_vma lock" (Lokesh Gidra)
Address a scalability issue in userfaultfd's UFFDIO_MOVE operation
"kasan: cleanups for kasan_enabled() checks" (Sabyrzhan Tasbolatov)
"drivers/base/node: fold node register and unregister functions" (Donet Tom)
Clean up the NUMA node handling code a little
"mm: some optimizations for prot numa" (Kefeng Wang)
Cleanups and small optimizations to the NUMA allocation hinting
code
"mm/page_alloc: Batch callers of free_pcppages_bulk" (Joshua Hahn)
Address long lock hold times at boot on large machines. These were
causing (harmless) softlockup warnings
"optimize the logic for handling dirty file folios during reclaim" (Baolin Wang)
Remove some now-unnecessary work from page reclaim
"mm/damon: allow DAMOS auto-tuned for per-memcg per-node memory usage" (SeongJae Park)
Enhance the DAMOS auto-tuning feature
"mm/damon: fixes for address alignment issues in DAMON_LRU_SORT and DAMON_RECLAIM" (Quanmin Yan)
Fix DAMON_LRU_SORT and DAMON_RECLAIM with certain userspace
configuration
"expand mmap_prepare functionality, port more users" (Lorenzo Stoakes)
Enhance the new(ish) file_operations.mmap_prepare() method and port
additional callsites from the old ->mmap() over to ->mmap_prepare()
"Fix stale IOTLB entries for kernel address space" (Lu Baolu)
Fix a bug (and possible security issue on non-x86) in the IOMMU
code. In some situations the IOMMU could be left hanging onto a
stale kernel pagetable entry
"mm/huge_memory: cleanup __split_unmapped_folio()" (Wei Yang)
Clean up and optimize the folio splitting code
"mm, swap: misc cleanup and bugfix" (Kairui Song)
Some cleanups and a minor fix in the swap discard code
"mm/damon: misc documentation fixups" (SeongJae Park)
"mm/damon: support pin-point targets removal" (SeongJae Park)
Permit userspace to remove a specific monitoring target in the
middle of the current targets list
"mm: MISC follow-up patches for linux/pgalloc.h" (Harry Yoo)
A couple of cleanups related to mm header file inclusion
"mm/swapfile.c: select swap devices of default priority round robin" (Baoquan He)
improve the selection of swap devices for NUMA machines
"mm: Convert memory block states (MEM_*) macros to enums" (Israel Batista)
Change the memory block labels from macros to enums so they will
appear in kernel debug info
"ksm: perform a range-walk to jump over holes in break_ksm" (Pedro Demarchi Gomes)
Address an inefficiency when KSM unmerges an address range
"mm/damon/tests: fix memory bugs in kunit tests" (SeongJae Park)
Fix leaks and unhandled malloc() failures in DAMON userspace unit
tests
"some cleanups for pageout()" (Baolin Wang)
Clean up a couple of minor things in the page scanner's
writeback-for-eviction code
"mm/hugetlb: refactor sysfs/sysctl interfaces" (Hui Zhu)
Move hugetlb's sysfs/sysctl handling code into a new file
"introduce VM_MAYBE_GUARD and make it sticky" (Lorenzo Stoakes)
Make the VMA guard regions available in /proc/pid/smaps and
improves the mergeability of guarded VMAs
"mm: perform guard region install/remove under VMA lock" (Lorenzo Stoakes)
Reduce mmap lock contention for callers performing VMA guard region
operations
"vma_start_write_killable" (Matthew Wilcox)
Start work on permitting applications to be killed when they are
waiting on a read_lock on the VMA lock
"mm/damon/tests: add more tests for online parameters commit" (SeongJae Park)
Add additional userspace testing of DAMON's "commit" feature
"mm/damon: misc cleanups" (SeongJae Park)
"make VM_SOFTDIRTY a sticky VMA flag" (Lorenzo Stoakes)
Address the possible loss of a VMA's VM_SOFTDIRTY flag when that
VMA is merged with another
"mm: support device-private THP" (Balbir Singh)
Introduce support for Transparent Huge Page (THP) migration in zone
device-private memory
"Optimize folio split in memory failure" (Zi Yan)
"mm/huge_memory: Define split_type and consolidate split support checks" (Wei Yang)
Some more cleanups in the folio splitting code
"mm: remove is_swap_[pte, pmd]() + non-swap entries, introduce leaf entries" (Lorenzo Stoakes)
Clean up our handling of pagetable leaf entries by introducing the
concept of 'software leaf entries', of type softleaf_t
"reparent the THP split queue" (Muchun Song)
Reparent the THP split queue to its parent memcg. This is in
preparation for addressing the long-standing "dying memcg" problem,
wherein dead memcg's linger for too long, consuming memory
resources
"unify PMD scan results and remove redundant cleanup" (Wei Yang)
A little cleanup in the hugepage collapse code
"zram: introduce writeback bio batching" (Sergey Senozhatsky)
Improve zram writeback efficiency by introducing batched bio
writeback support
"memcg: cleanup the memcg stats interfaces" (Shakeel Butt)
Clean up our handling of the interrupt safety of some memcg stats
"make vmalloc gfp flags usage more apparent" (Vishal Moola)
Clean up vmalloc's handling of incoming GFP flags
"mm: Add soft-dirty and uffd-wp support for RISC-V" (Chunyan Zhang)
Teach soft dirty and userfaultfd write protect tracking to use
RISC-V's Svrsw60t59b extension
"mm: swap: small fixes and comment cleanups" (Youngjun Park)
Fix a small bug and clean up some of the swap code
"initial work on making VMA flags a bitmap" (Lorenzo Stoakes)
Start work on converting the vma struct's flags to a bitmap, so we
stop running out of them, especially on 32-bit
"mm/swapfile: fix and cleanup swap list iterations" (Youngjun Park)
Address a possible bug in the swap discard code and clean things
up a little
[ This merge also reverts commit ebb9aeb980e5 ("vfio/nvgrace-gpu:
register device memory for poison handling") because it looks
broken to me, I've asked for clarification - Linus ]
* tag 'mm-stable-2025-12-03-21-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (321 commits)
mm: fix vma_start_write_killable() signal handling
mm/swapfile: use plist_for_each_entry in __folio_throttle_swaprate
mm/swapfile: fix list iteration when next node is removed during discard
fs/proc/task_mmu.c: fix make_uffd_wp_huge_pte() huge pte handling
mm/kfence: add reboot notifier to disable KFENCE on shutdown
memcg: remove inc/dec_lruvec_kmem_state helpers
selftests/mm/uffd: initialize char variable to Null
mm: fix DEBUG_RODATA_TEST indentation in Kconfig
mm: introduce VMA flags bitmap type
tools/testing/vma: eliminate dependency on vma->__vm_flags
mm: simplify and rename mm flags function for clarity
mm: declare VMA flags by bit
zram: fix a spelling mistake
mm/page_alloc: optimize lowmem_reserve max lookup using its semantic monotonicity
mm/vmscan: skip increasing kswapd_failures when reclaim was boosted
pagemap: update BUDDY flag documentation
mm: swap: remove scan_swap_map_slots() references from comments
mm: swap: change swap_alloc_slow() to void
mm, swap: remove redundant comment for read_swap_cache_async
mm, swap: use SWP_SOLIDSTATE to determine if swap is rotational
...
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https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into soc/dt
Samsung DTS ARM changes for v6.19
Fix WiFi on Exynos4210 and Exynos4412 boards with Broadcom chip after
system suspend and resume, by using cap-power-off-card to power off the
WiFi during suspend.
* tag 'samsung-dt-6.19' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
ARM: dts: samsung: exynos4412-midas: turn off SDIO WLAN chip during system suspend
ARM: dts: samsung: exynos4210-trats: turn off SDIO WLAN chip during system suspend
ARM: dts: samsung: exynos4210-i9100: turn off SDIO WLAN chip during system suspend
ARM: dts: samsung: universal_c210: turn off SDIO WLAN chip during system suspend
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The ams-delta-fiq-handler.S file has a number of symbols with fairly
generic names, including one named 'exit' that causes a compiler warning
in some configuration options:
vmlinux.o: error: exit() function name creates ambiguity with -ffunction-sections
Change all these symbols to use a .L prefix to make them local to
the fiq handler.
Reviewed-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Link: https://lore.kernel.org/r/20251204095355.1032786-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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