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Merge tag 'audit-pr-20250121' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
Pull audit update from Paul Moore:
"A single audit patch that fixes a problem when collecting pathnames
for audit PATH records that was caused by some faulty pathname
matching logic"
* tag 'audit-pr-20250121' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
audit: fix suffixed '/' filename matching
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Merge tag 'selinux-pr-20250121' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux updates from Paul Moore:
- Extended permissions supported in conditional policy
The SELinux extended permissions, aka "xperms", allow security admins
to target individuals ioctls, and recently netlink messages, with
their SELinux policy. Adding support for conditional policies allows
admins to toggle the granular xperms using SELinux booleans, helping
pave the way for greater use of xperms in general purpose SELinux
policies. This change bumps the maximum SELinux policy version to 34.
- Fix a SCTP/SELinux error return code inconsistency
Depending on the loaded SELinux policy, specifically it's
EXTSOCKCLASS support, the bind(2) LSM/SELinux hook could return
different error codes due to the SELinux code checking the socket's
SELinux object class (which can vary depending on EXTSOCKCLASS) and
not the socket's sk_protocol field. We fix this by doing the obvious,
and looking at the sock->sk_protocol field instead of the object
class.
- Makefile fixes to properly cleanup av_permissions.h
Add av_permissions.h to "targets" so that it is properly cleaned up
using the kbuild infrastructure.
- A number of smaller improvements by Christian Göttsche
A variety of straightforward changes to reduce code duplication,
reduce pointer lookups, migrate void pointers to defined types,
simplify code, constify function parameters, and correct iterator
types.
* tag 'selinux-pr-20250121' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: make more use of str_read() when loading the policy
selinux: avoid unnecessary indirection in struct level_datum
selinux: use known type instead of void pointer
selinux: rename comparison functions for clarity
selinux: rework match_ipv6_addrmask()
selinux: constify and reconcile function parameter names
selinux: avoid using types indicating user space interaction
selinux: supply missing field initializers
selinux: add netlink nlmsg_type audit message
selinux: add support for xperms in conditional policies
selinux: Fix SCTP error inconsistency in selinux_socket_bind()
selinux: use native iterator types
selinux: add generated av_permissions.h to targets
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Merge tag 'lsm-pr-20250121' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm
Pull lsm updates from Paul Moore:
- Improved handling of LSM "secctx" strings through lsm_context struct
The LSM secctx string interface is from an older time when only one
LSM was supported, migrate over to the lsm_context struct to better
support the different LSMs we now have and make it easier to support
new LSMs in the future.
These changes explain the Rust, VFS, and networking changes in the
diffstat.
- Only build lsm_audit.c if CONFIG_SECURITY and CONFIG_AUDIT are
enabled
Small tweak to be a bit smarter about when we build the LSM's common
audit helpers.
- Check for absurdly large policies from userspace in SafeSetID
SafeSetID policies rules are fairly small, basically just "UID:UID",
it easy to impose a limit of KMALLOC_MAX_SIZE on policy writes which
helps quiet a number of syzbot related issues. While work is being
done to address the syzbot issues through other mechanisms, this is a
trivial and relatively safe fix that we can do now.
- Various minor improvements and cleanups
A collection of improvements to the kernel selftests, constification
of some function parameters, removing redundant assignments, and
local variable renames to improve readability.
* tag 'lsm-pr-20250121' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm:
lockdown: initialize local array before use to quiet static analysis
safesetid: check size of policy writes
net: corrections for security_secid_to_secctx returns
lsm: rename variable to avoid shadowing
lsm: constify function parameters
security: remove redundant assignment to return variable
lsm: Only build lsm_audit.c if CONFIG_SECURITY and CONFIG_AUDIT are set
selftests: refactor the lsm `flags_overset_lsm_set_self_attr` test
binder: initialize lsm_context structure
rust: replace lsm context+len with lsm_context
lsm: secctx provider check on release
lsm: lsm_context in security_dentry_init_security
lsm: use lsm_context in security_inode_getsecctx
lsm: replace context+len with lsm_context
lsm: ensure the correct LSM context releaser
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Merge tag 'integrity-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
Pull integrity updates from Mimi Zohar:
"There's just a couple of changes: two kernel messages addressed, a
measurement policy collision addressed, and one policy cleanup.
Please note that the contents of the IMA measurement list is
potentially affected. The builtin tmpfs IMA policy rule change might
introduce additional measurements, while detecting a reboot might
eliminate some measurements"
* tag 'integrity-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
ima: ignore suffixed policy rule comments
ima: limit the builtin 'tcb' dont_measure tmpfs policy rule
ima: kexec: silence RCU list traversal warning
ima: Suspend PCR extends and log appends when rebooting
* New
- Support new EC if the memory region information comes from the CRS
ACPI resource descriptor in cros_ec_lpc.
* Improvements
- Make sure EC is in RW before probing.
- Only check events on MKBP notifies to reduce the number of query
commands in cros_ec_lpc.
* Cleanups
- Remove unused code and DT bindings for cros-kbd-led-backlight.
- Constify 'struct bin_attribute' in cros_ec_vbc.
- Use str_enabled_disabled() in cros_usbpd_logger.
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Merge tag 'chrome-platform-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux
Pull chrome platform updates from Tzung-Bi Shih:
"New:
- Support new EC if the memory region information comes from the CRS
ACPI resource descriptor in cros_ec_lpc
Improvements:
- Make sure EC is in RW before probing
- Only check events on MKBP notifies to reduce the number of query
commands in cros_ec_lpc
Cleanups:
- Remove unused code and DT bindings for cros-kbd-led-backlight
- Constify 'struct bin_attribute' in cros_ec_vbc
- Use str_enabled_disabled() in cros_usbpd_logger"
* tag 'chrome-platform-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
platform/chrome: cros_ec_lpc: Handle EC without CRS section
platform/chrome: cros_usbpd_logger: Use str_enabled_disabled() helper
platform/chrome: cros_ec_lpc: Support direct EC register memory access
platform/chrome: cros_ec_lpc: Merge lpc_driver_ops into ec private structure
platform/chrome: Update ChromeOS EC command tracing
platform/chrome: cros_ec_lpc: Only check for events on MKBP notifies
platform/chrome: cros_ec_vbc: Constify 'struct bin_attribute'
dt-bindings: cros-ec: Remove google,cros-kbd-led-backlight
platform/chrome: cros_kbd_led_backlight: Remove OF match
platform/chrome: cros_ec_proto: remove unnecessary retries
platform/chrome: cros_ec: jump to RW before probing
platform/chrome: cros_kbd_led_backlight: remove unneeded if-statement
- Quite a bit of Chinese and Spanish translation work.
- Clarifying that Git commit IDs >12chars are OK
- A new nvme-multipath document
- A reorganization of the admin-guide top-level page to make it readable
- Clarification of the role of Acked-by and maintainer discretion on their
acceptance.
- Some reorganization of debugging-oriented docs.
...and typo fixes, documentation updates, etc. as usual.
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Merge tag 'docs-6.14' of git://git.lwn.net/linux
Pull Documentation updates from Jonathan Corbet:
- Quite a bit of Chinese and Spanish translation work
- Clarifying that Git commit IDs >12chars are OK
- A new nvme-multipath document
- A reorganization of the admin-guide top-level page to make it
readable
- Clarification of the role of Acked-by and maintainer discretion on
their acceptance
- Some reorganization of debugging-oriented docs
... and typo fixes, documentation updates, etc as usual
* tag 'docs-6.14' of git://git.lwn.net/linux: (50 commits)
Documentation: Fix x86_64 UEFI outdated references to elilo
Documentation/sysctl: Add timer_migration to kernel.rst
docs/mm: Physical memory: Remove zone_t
docs: submitting-patches: clarify that signers may use their discretion on tags
docs: submitting-patches: clarify difference between Acked-by and Reviewed-by
docs: submitting-patches: clarify Acked-by and introduce "# Suffix"
Documentation: bug-hunting.rst: remove odd contact information
docs/zh_CN: Add sak index Chinese translation
doc: module: DEFAULT_SYMBOL_NAMESPACE must be defined before #includes
doc: module: Fix documented type of namespace
Documentation/kernel-parameters: Fix a reference to vga-softcursor.rst
docs/zh_CN: Add landlock index Chinese translation
Documentation: Fix typo localmodonfig -> localmodconfig
overlayfs.rst: Fix and improve grammar
docs/zh_CN: Add siphash index Chinese translation
docs/zh_CN: Add security IMA-templates Chinese translation
docs/zh_CN: Add security digsig Chinese translation
Align git commit ID abbreviation guidelines and checks
docs: process: submitting-patches: split canonical patch format section
docs/zh_CN: Add security lsm Chinese translation
...
Toolchain and infrastructure:
- Finish the move to custom FFI integer types started in the previous
cycle and finally map 'long' to 'isize' and 'char' to 'u8'. Do a few
cleanups on top thanks to that.
- Start to use 'derive(CoercePointee)' on Rust >= 1.84.0.
This is a major milestone on the path to build the kernel using only
stable Rust features. In particular, previously we were using the
unstable features 'coerce_unsized', 'dispatch_from_dyn' and 'unsize',
and now we will use the new 'derive_coerce_pointee' one, which is on
track to stabilization. This new feature is a macro that essentially
expands into code that internally uses the unstable features that we
were using before, without having to expose those.
With it, stable Rust users, including the kernel, will be able to
build custom smart pointers that work with trait objects, e.g.:
fn f(p: &Arc<dyn Display>) {
pr_info!("{p}\n");
}
let a: Arc<dyn Display> = Arc::new(42i32, GFP_KERNEL)?;
let b: Arc<dyn Display> = Arc::new("hello there", GFP_KERNEL)?;
f(&a); // Prints "42".
f(&b); // Prints "hello there".
Together with the 'arbitrary_self_types' feature that we started
using in the previous cycle, using our custom smart pointers like
'Arc' will eventually only rely in stable Rust.
- Introduce 'PROCMACROLDFLAGS' environment variable to allow to link
Rust proc macros using different flags than those used for linking
Rust host programs (e.g. when 'rustc' uses a different C library
than the host programs' one), which Android needs.
- Help kernel builds under macOS with Rust enabled by accomodating
other naming conventions for dynamic libraries (i.e. '.so' vs.
'.dylib') which are used for Rust procedural macros. The actual
support for macOS (i.e. the rest of the pieces needed) is provided
out-of-tree by others, following the policy used for other parts of
the kernel by Kbuild.
- Run Clippy for 'rusttest' code too and clean the bits it spotted.
- Provide Clippy with the minimum supported Rust version to improve
the suggestions it gives.
- Document 'bindgen' 0.71.0 regression.
'kernel' crate:
- 'build_error!': move users of the hidden function to the documented
macro, prevent such uses in the future by moving the function
elsewhere and add the macro to the prelude.
- 'types' module: add improved version of 'ForeignOwnable::borrow_mut'
(which was removed in the past since it was problematic); change
'ForeignOwnable' pointer type to '*mut'.
- 'alloc' module: implement 'Display' for 'Box' and align the 'Debug'
implementation to it; add example (doctest) for 'ArrayLayout::new()'.
- 'sync' module: document 'PhantomData' in 'Arc'; use
'NonNull::new_unchecked' in 'ForeignOwnable for Arc' impl.
- 'uaccess' module: accept 'Vec's with different allocators in
'UserSliceReader::read_all'.
- 'workqueue' module: enable run-testing a couple more doctests.
- 'error' module: simplify 'from_errno()'.
- 'block' module: fix formatting in code documentation (a lint to catch
these is being implemented).
- Avoid 'unwrap()'s in doctests, which also improves the examples by
showing how kernel code is supposed to be written.
- Avoid 'as' casts with 'cast{,_mut}' calls which are a bit safer.
And a few other cleanups.
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Merge tag 'rust-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux
Pull rust updates from Miguel Ojeda:
"Toolchain and infrastructure:
- Finish the move to custom FFI integer types started in the previous
cycle and finally map 'long' to 'isize' and 'char' to 'u8'. Do a
few cleanups on top thanks to that.
- Start to use 'derive(CoercePointee)' on Rust >= 1.84.0.
This is a major milestone on the path to build the kernel using
only stable Rust features. In particular, previously we were using
the unstable features 'coerce_unsized', 'dispatch_from_dyn' and
'unsize', and now we will use the new 'derive_coerce_pointee' one,
which is on track to stabilization. This new feature is a macro
that essentially expands into code that internally uses the
unstable features that we were using before, without having to
expose those.
With it, stable Rust users, including the kernel, will be able to
build custom smart pointers that work with trait objects, e.g.:
fn f(p: &Arc<dyn Display>) {
pr_info!("{p}\n");
}
let a: Arc<dyn Display> = Arc::new(42i32, GFP_KERNEL)?;
let b: Arc<dyn Display> = Arc::new("hello there", GFP_KERNEL)?;
f(&a); // Prints "42".
f(&b); // Prints "hello there".
Together with the 'arbitrary_self_types' feature that we started
using in the previous cycle, using our custom smart pointers like
'Arc' will eventually only rely in stable Rust.
- Introduce 'PROCMACROLDFLAGS' environment variable to allow to link
Rust proc macros using different flags than those used for linking
Rust host programs (e.g. when 'rustc' uses a different C library
than the host programs' one), which Android needs.
- Help kernel builds under macOS with Rust enabled by accomodating
other naming conventions for dynamic libraries (i.e. '.so' vs.
'.dylib') which are used for Rust procedural macros. The actual
support for macOS (i.e. the rest of the pieces needed) is provided
out-of-tree by others, following the policy used for other parts of
the kernel by Kbuild.
- Run Clippy for 'rusttest' code too and clean the bits it spotted.
- Provide Clippy with the minimum supported Rust version to improve
the suggestions it gives.
- Document 'bindgen' 0.71.0 regression.
'kernel' crate:
- 'build_error!': move users of the hidden function to the documented
macro, prevent such uses in the future by moving the function
elsewhere and add the macro to the prelude.
- 'types' module: add improved version of 'ForeignOwnable::borrow_mut'
(which was removed in the past since it was problematic); change
'ForeignOwnable' pointer type to '*mut'.
- 'alloc' module: implement 'Display' for 'Box' and align the 'Debug'
implementation to it; add example (doctest) for 'ArrayLayout::new()'
- 'sync' module: document 'PhantomData' in 'Arc'; use
'NonNull::new_unchecked' in 'ForeignOwnable for Arc' impl.
- 'uaccess' module: accept 'Vec's with different allocators in
'UserSliceReader::read_all'.
- 'workqueue' module: enable run-testing a couple more doctests.
- 'error' module: simplify 'from_errno()'.
- 'block' module: fix formatting in code documentation (a lint to catch
these is being implemented).
- Avoid 'unwrap()'s in doctests, which also improves the examples by
showing how kernel code is supposed to be written.
- Avoid 'as' casts with 'cast{,_mut}' calls which are a bit safer.
And a few other cleanups"
* tag 'rust-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux: (32 commits)
kbuild: rust: add PROCMACROLDFLAGS
rust: uaccess: generalize userSliceReader to support any Vec
rust: kernel: add improved version of `ForeignOwnable::borrow_mut`
rust: kernel: reorder `ForeignOwnable` items
rust: kernel: change `ForeignOwnable` pointer to mut
rust: arc: split unsafe block, add missing comment
rust: types: avoid `as` casts
rust: arc: use `NonNull::new_unchecked`
rust: use derive(CoercePointee) on rustc >= 1.84.0
rust: alloc: add doctest for `ArrayLayout::new()`
rust: init: update `stack_try_pin_init` examples
rust: error: import `kernel`'s `LayoutError` instead of `core`'s
rust: str: replace unwraps with question mark operators
rust: page: remove unnecessary helper function from doctest
rust: rbtree: remove unwrap in asserts
rust: init: replace unwraps with question mark operators
rust: use host dylib naming convention to support macOS
rust: add `build_error!` to the prelude
rust: kernel: move `build_error` hidden function to prevent mistakes
rust: use the `build_error!` macro, not the hidden function
...
1) Per-CPU kthreads must stay affine to a single CPU and never execute
relevant code on any other CPU. This is currently handled by smpboot
code which takes care of CPU-hotplug operations. Affinity here is
a correctness constraint.
2) Some kthreads _have_ to be affine to a specific set of CPUs and can't
run anywhere else. The affinity is set through kthread_bind_mask()
and the subsystem takes care by itself to handle CPU-hotplug
operations. Affinity here is assumed to be a correctness constraint.
3) Per-node kthreads _prefer_ to be affine to a specific NUMA node. This
is not a correctness constraint but merely a preference in terms of
memory locality. kswapd and kcompactd both fall into this category.
The affinity is set manually like for any other task and CPU-hotplug
is supposed to be handled by the relevant subsystem so that the task
is properly reaffined whenever a given CPU from the node comes up.
Also care should be taken so that the node affinity doesn't cross
isolated (nohz_full) cpumask boundaries.
4) Similar to the previous point except kthreads have a _preferred_
affinity different than a node. Both RCU boost kthreads and RCU
exp kworkers fall into this category as they refer to "RCU nodes"
from a distinctly distributed tree.
Currently the preferred affinity patterns (3 and 4) have at least 4
identified users, with more or less success when it comes to handle
CPU-hotplug operations and CPU isolation. Each of which do it in its own
ad-hoc way.
This is an infrastructure proposal to handle this with the following API
changes:
_ kthread_create_on_node() automatically affines the created kthread to
its target node unless it has been set as per-cpu or bound with
kthread_bind[_mask]() before the first wake-up.
- kthread_affine_preferred() is a new function that can be called right
after kthread_create_on_node() to specify a preferred affinity
different than the specified node.
When the preferred affinity can't be applied because the possible
targets are offline or isolated (nohz_full), the kthread is affine
to the housekeeping CPUs (which means to all online CPUs most of the
time or only the non-nohz_full CPUs when nohz_full= is set).
kswapd, kcompactd, RCU boost kthreads and RCU exp kworkers have been
converted, along with a few old drivers.
Summary of the changes:
* Consolidate a bunch of ad-hoc implementations of kthread_run_on_cpu()
* Introduce task_cpu_fallback_mask() that defines the default last
resort affinity of a task to become nohz_full aware
* Add some correctness check to ensure kthread_bind() is always called
before the first kthread wake up.
* Default affine kthread to its preferred node.
* Convert kswapd / kcompactd and remove their halfway working ad-hoc
affinity implementation
* Implement kthreads preferred affinity
* Unify kthread worker and kthread API's style
* Convert RCU kthreads to the new API and remove the ad-hoc affinity
implementation.
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Merge tag 'kthread-for-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks
Pull kthread updates from Frederic Weisbecker:
"Kthreads affinity follow either of 4 existing different patterns:
1) Per-CPU kthreads must stay affine to a single CPU and never
execute relevant code on any other CPU. This is currently handled
by smpboot code which takes care of CPU-hotplug operations.
Affinity here is a correctness constraint.
2) Some kthreads _have_ to be affine to a specific set of CPUs and
can't run anywhere else. The affinity is set through
kthread_bind_mask() and the subsystem takes care by itself to
handle CPU-hotplug operations. Affinity here is assumed to be a
correctness constraint.
3) Per-node kthreads _prefer_ to be affine to a specific NUMA node.
This is not a correctness constraint but merely a preference in
terms of memory locality. kswapd and kcompactd both fall into this
category. The affinity is set manually like for any other task and
CPU-hotplug is supposed to be handled by the relevant subsystem so
that the task is properly reaffined whenever a given CPU from the
node comes up. Also care should be taken so that the node affinity
doesn't cross isolated (nohz_full) cpumask boundaries.
4) Similar to the previous point except kthreads have a _preferred_
affinity different than a node. Both RCU boost kthreads and RCU
exp kworkers fall into this category as they refer to "RCU nodes"
from a distinctly distributed tree.
Currently the preferred affinity patterns (3 and 4) have at least 4
identified users, with more or less success when it comes to handle
CPU-hotplug operations and CPU isolation. Each of which do it in its
own ad-hoc way.
This is an infrastructure proposal to handle this with the following
API changes:
- kthread_create_on_node() automatically affines the created kthread
to its target node unless it has been set as per-cpu or bound with
kthread_bind[_mask]() before the first wake-up.
- kthread_affine_preferred() is a new function that can be called
right after kthread_create_on_node() to specify a preferred
affinity different than the specified node.
When the preferred affinity can't be applied because the possible
targets are offline or isolated (nohz_full), the kthread is affine to
the housekeeping CPUs (which means to all online CPUs most of the time
or only the non-nohz_full CPUs when nohz_full= is set).
kswapd, kcompactd, RCU boost kthreads and RCU exp kworkers have been
converted, along with a few old drivers.
Summary of the changes:
- Consolidate a bunch of ad-hoc implementations of
kthread_run_on_cpu()
- Introduce task_cpu_fallback_mask() that defines the default last
resort affinity of a task to become nohz_full aware
- Add some correctness check to ensure kthread_bind() is always
called before the first kthread wake up.
- Default affine kthread to its preferred node.
- Convert kswapd / kcompactd and remove their halfway working ad-hoc
affinity implementation
- Implement kthreads preferred affinity
- Unify kthread worker and kthread API's style
- Convert RCU kthreads to the new API and remove the ad-hoc affinity
implementation"
* tag 'kthread-for-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks:
kthread: modify kernel-doc function name to match code
rcu: Use kthread preferred affinity for RCU exp kworkers
treewide: Introduce kthread_run_worker[_on_cpu]()
kthread: Unify kthread_create_on_cpu() and kthread_create_worker_on_cpu() automatic format
rcu: Use kthread preferred affinity for RCU boost
kthread: Implement preferred affinity
mm: Create/affine kswapd to its preferred node
mm: Create/affine kcompactd to its preferred node
kthread: Default affine kthread to its preferred NUMA node
kthread: Make sure kthread hasn't started while binding it
sched,arm64: Handle CPU isolation on last resort fallback rq selection
arm64: Exclude nohz_full CPUs from 32bits el0 support
lib: test_objpool: Use kthread_run_on_cpu()
kallsyms: Use kthread_run_on_cpu()
soc/qman: test: Use kthread_run_on_cpu()
arm/bL_switcher: Use kthread_run_on_cpu()
core:
- device memory cgroup controller added
- Remove driver date from drm_driver
- Add drm_printer based hex dumper
- drm memory stats docs update
- scheduler documentation improvements
new driver:
- amdxdna - Ryzen AI NPU support
connector:
- add a mutex to protect ELD
- make connector setup two-step
panels:
- Introduce backlight quirks infrastructure
- New panels: KDB KD116N2130B12, Tianma TM070JDHG34-00,
- Multi-Inno Technology MI1010Z1T-1CP11
bridge:
- ti-sn65dsi83: Add ti,lvds-vod-swing optional properties
- Provide default implementation of atomic_check for HDMI bridges
- it605: HDCP improvements, MCCS Support
xe:
- make OA buffer size configurable
- GuC capture fixes
- add ufence and g2h flushes
- restore system memory GGTT mappings
- ioctl fixes
- SRIOV PF scheduling priority
- allow fault injection
- lots of improvements/refactors
- Enable GuC's WA_DUAL_QUEUE for newer platforms
- IRQ related fixes and improvements
i915:
- More accurate engine busyness metrics with GuC submission
- Ensure partial BO segment offset never exceeds allowed max
- Flush GuC CT receive tasklet during reset preparation
- Some DG2 refactor to fix DG2 bugs when operating with certain CPUs
- Fix DG1 power gate sequence
- Enabling uncompressed 128b/132b UHBR SST
- Handle hdmi connector init failures, and no HDMI/DP cases
- More robust engine resets on Haswell and older
i915/xe display:
- HDCP fixes for Xe3Lpd
- New GSC FW ARL-H/ARL-U
- support 3 VDSC engines 12 slices
- MBUS joining sanitisation
- reconcile i915/xe display power mgmt
- Xe3Lpd fixes
- UHBR rates for Thunderbolt
amdgpu:
- DRM panic support
- track BO memory stats at runtime
- Fix max surface handling in DC
- Cleaner shader support for gfx10.3 dGPUs
- fix drm buddy trim handling
- SDMA engine reset updates
- Fix doorbell ttm cleanup
- RAS updates
- ISP updates
- SDMA queue reset support
- Rework DPM powergating interfaces
- Documentation updates and cleanups
- DCN 3.5 updates
- Use a pm notifier to more gracefully handle VRAM eviction on suspend or hibernate
- Add debugfs interfaces for forcing scheduling to specific engine instances
- GG 9.5 updates
- IH 4.4 updates
- Make missing optional firmware less noisy
- PSP 13.x updates
- SMU 13.x updates
- VCN 5.x updates
- JPEG 5.x updates
- GC 12.x updates
- DC FAMS updates
amdkfd:
- GG 9.5 updates
- Logging improvements
- Shader debugger fixes
- Trap handler cleanup
- Cleanup includes
- Eviction fence wq fix
msm:
- MDSS:
- properly described UBWC registers
- added SM6150 (aka QCS615) support
- DPU:
- added SM6150 (aka QCS615) support
- enabled wide planes if virtual planes are enabled (by using two SSPPs for a single plane)
- added CWB hardware blocks support
- DSI:
- added SM6150 (aka QCS615) support
- GPU:
- Print GMU core fw version
- GMU bandwidth voting for a740 and a750
- Expose uche trap base via uapi
- UAPI error reporting
rcar-du:
- Add r8a779h0 Support
ivpu:
- Fix qemu crash when using passthrough
nouveau:
- expose GSP-RM logging buffers via debugfs
panfrost:
- Add MT8188 Mali-G57 MC3 support
rockchip:
- Gamma LUT support
hisilicon:
- new HIBMC support
virtio-gpu:
- convert to helpers
- add prime support for scanout buffers
v3d:
- Add DRM_IOCTL_V3D_PERFMON_SET_GLOBAL
vc4:
- Add support for BCM2712
vkms:
- line-per-line compositing algorithm to improve performance
zynqmp:
- Add DP audio support
mediatek:
- dp: Add sdp path reset
- dp: Support flexible length of DP calibration data
etnaviv:
- add fdinfo memory support
- add explicit reset handling
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Merge tag 'drm-next-2025-01-17' of https://gitlab.freedesktop.org/drm/kernel
Pull drm updates from Dave Airlie:
"There are two external interactions of note, the msm tree pull in some
opp tree, hopefully the opp tree arrives from the same git tree
however it normally does.
There is also a new cgroup controller for device memory, that is used
by drm, so is merging through my tree. This will hopefully help open
up gpu cgroup usage a bit more and move us forward.
There is a new accelerator driver for the AMD XDNA Ryzen AI NPUs.
Then the usual xe/amdgpu/i915/msm leaders and lots of changes and
refactors across the board:
core:
- device memory cgroup controller added
- Remove driver date from drm_driver
- Add drm_printer based hex dumper
- drm memory stats docs update
- scheduler documentation improvements
new driver:
- amdxdna - Ryzen AI NPU support
connector:
- add a mutex to protect ELD
- make connector setup two-step
panels:
- Introduce backlight quirks infrastructure
- New panels: KDB KD116N2130B12, Tianma TM070JDHG34-00,
- Multi-Inno Technology MI1010Z1T-1CP11
bridge:
- ti-sn65dsi83: Add ti,lvds-vod-swing optional properties
- Provide default implementation of atomic_check for HDMI bridges
- it605: HDCP improvements, MCCS Support
xe:
- make OA buffer size configurable
- GuC capture fixes
- add ufence and g2h flushes
- restore system memory GGTT mappings
- ioctl fixes
- SRIOV PF scheduling priority
- allow fault injection
- lots of improvements/refactors
- Enable GuC's WA_DUAL_QUEUE for newer platforms
- IRQ related fixes and improvements
i915:
- More accurate engine busyness metrics with GuC submission
- Ensure partial BO segment offset never exceeds allowed max
- Flush GuC CT receive tasklet during reset preparation
- Some DG2 refactor to fix DG2 bugs when operating with certain CPUs
- Fix DG1 power gate sequence
- Enabling uncompressed 128b/132b UHBR SST
- Handle hdmi connector init failures, and no HDMI/DP cases
- More robust engine resets on Haswell and older
i915/xe display:
- HDCP fixes for Xe3Lpd
- New GSC FW ARL-H/ARL-U
- support 3 VDSC engines 12 slices
- MBUS joining sanitisation
- reconcile i915/xe display power mgmt
- Xe3Lpd fixes
- UHBR rates for Thunderbolt
amdgpu:
- DRM panic support
- track BO memory stats at runtime
- Fix max surface handling in DC
- Cleaner shader support for gfx10.3 dGPUs
- fix drm buddy trim handling
- SDMA engine reset updates
- Fix doorbell ttm cleanup
- RAS updates
- ISP updates
- SDMA queue reset support
- Rework DPM powergating interfaces
- Documentation updates and cleanups
- DCN 3.5 updates
- Use a pm notifier to more gracefully handle VRAM eviction on
suspend or hibernate
- Add debugfs interfaces for forcing scheduling to specific engine
instances
- GG 9.5 updates
- IH 4.4 updates
- Make missing optional firmware less noisy
- PSP 13.x updates
- SMU 13.x updates
- VCN 5.x updates
- JPEG 5.x updates
- GC 12.x updates
- DC FAMS updates
amdkfd:
- GG 9.5 updates
- Logging improvements
- Shader debugger fixes
- Trap handler cleanup
- Cleanup includes
- Eviction fence wq fix
msm:
- MDSS:
- properly described UBWC registers
- added SM6150 (aka QCS615) support
- DPU:
- added SM6150 (aka QCS615) support
- enabled wide planes if virtual planes are enabled (by using two
SSPPs for a single plane)
- added CWB hardware blocks support
- DSI:
- added SM6150 (aka QCS615) support
- GPU:
- Print GMU core fw version
- GMU bandwidth voting for a740 and a750
- Expose uche trap base via uapi
- UAPI error reporting
rcar-du:
- Add r8a779h0 Support
ivpu:
- Fix qemu crash when using passthrough
nouveau:
- expose GSP-RM logging buffers via debugfs
panfrost:
- Add MT8188 Mali-G57 MC3 support
rockchip:
- Gamma LUT support
hisilicon:
- new HIBMC support
virtio-gpu:
- convert to helpers
- add prime support for scanout buffers
v3d:
- Add DRM_IOCTL_V3D_PERFMON_SET_GLOBAL
vc4:
- Add support for BCM2712
vkms:
- line-per-line compositing algorithm to improve performance
zynqmp:
- Add DP audio support
mediatek:
- dp: Add sdp path reset
- dp: Support flexible length of DP calibration data
etnaviv:
- add fdinfo memory support
- add explicit reset handling"
* tag 'drm-next-2025-01-17' of https://gitlab.freedesktop.org/drm/kernel: (1070 commits)
drm/bridge: fix documentation for the hdmi_audio_prepare() callback
doc/cgroup: Fix title underline length
drm/doc: Include new drm-compute documentation
cgroup/dmem: Fix parameters documentation
cgroup/dmem: Select PAGE_COUNTER
kernel/cgroup: Remove the unused variable climit
drm/display: hdmi: Do not read EDID on disconnected connectors
drm/tests: hdmi: Add connector disablement test
drm/connector: hdmi: Do atomic check when necessary
drm/amd/display: 3.2.316
drm/amd/display: avoid reset DTBCLK at clock init
drm/amd/display: improve dpia pre-train
drm/amd/display: Apply DML21 Patches
drm/amd/display: Use HW lock mgr for PSR1
drm/amd/display: Revised for Replay Pseudo vblank control
drm/amd/display: Add a new flag for replay low hz
drm/amd/display: Remove unused read_ono_state function from Hwss module
drm/amd/display: Do not elevate mem_type change to full update
drm/amd/display: Do not wait for PSR disable on vbl enable
drm/amd/display: Remove unnecessary eDP power down
...
The sorttable.c was a copy from recordmcount.c which is very hard to
maintain. That's because it uses macro helpers and places the code in a
header file sorttable.h to handle both the 64 bit and 32 bit version of
the Elf structures. It also uses _r()/r()/r2() wrappers around accessing
the data which will read the 64 bit or 32 bit version of the data as well
as handle endianess. If the wrong wrapper is used, an invalid value will
result, and this has been a cause for bugs in the past. In fact the new
ORC code doesn't even use it. That's fine because ORC is only for 64 bit
x86 which is the default parsing.
Instead of having a bunch of macros defined and then include the code
twice from a header, the Elf structures are each wrapped in a union. The
union holds the 64 bit and 32 bit version of the needed structure. Then
a structure of function pointers is used, along with helper macros
to access the ELF types appropriately for their byte size and endianess.
How to reference the data fields is moved from the code that implements
the sorting to the helper functions where all accesses to a field will
use he same helper function. As long as the helper functions access
the fields correctly, the code will also access the fields. This is
an improvement over having to code implementing the sorting having to
make sure it always uses the right accessor function when reading an
ELF field.
This is a clean up only, the functionality of the scripts/sorttable.c
does not change.
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Merge tag 'trace-sorttable-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull scipts/sorttable updates from Steven Rostedt:
"The sorttable.c was a copy from recordmcount.c which is very hard to
maintain. That's because it uses macro helpers and places the code in
a header file sorttable.h to handle both the 64 bit and 32 bit version
of the Elf structures. It also uses _r()/r()/r2() wrappers around
accessing the data which will read the 64 bit or 32 bit version of the
data as well as handle endianess. If the wrong wrapper is used, an
invalid value will result, and this has been a cause for bugs in the
past. In fact the new ORC code doesn't even use it. That's fine
because ORC is only for 64 bit x86 which is the default parsing.
Instead of having a bunch of macros defined and then include the code
twice from a header, the Elf structures are each wrapped in a union.
The union holds the 64 bit and 32 bit version of the needed structure.
Then a structure of function pointers is used, along with helper
macros to access the ELF types appropriately for their byte size and
endianess. How to reference the data fields is moved from the code
that implements the sorting to the helper functions where all accesses
to a field will use he same helper function. As long as the helper
functions access the fields correctly, the code will also access the
fields. This is an improvement over having to code implementing the
sorting having to make sure it always uses the right accessor function
when reading an ELF field.
This is a clean up only, the functionality of the scripts/sorttable.c
does not change"
* tag 'trace-sorttable-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
scripts/sorttable: Use a structure of function pointers for elf helpers
scripts/sorttable: Get start/stop_mcount_loc from ELF file directly
scripts/sorttable: Move code from sorttable.h into sorttable.c
scripts/sorttable: Use uint64_t for mcount sorting
scripts/sorttable: Add helper functions for Elf_Sym
scripts/sorttable: Add helper functions for Elf_Shdr
scripts/sorttable: Add helper functions for Elf_Ehdr
scripts/sorttable: Convert Elf_Sym MACRO over to a union
scripts/sorttable: Replace Elf_Shdr Macro with a union
scripts/sorttable: Convert Elf_Ehdr to union
scripts/sorttable: Make compare_extable() into two functions
scripts/sorttable: Have the ORC code use the _r() functions to read
scripts/sorttable: Remove unneeded Elf_Rel
scripts/sorttable: Remove unused write functions
scripts/sorttable: Remove unused macro defines
- Have fprobes built on top of function graph infrastructure
The fprobe logic is an optimized kprobe that uses ftrace to attach to
functions when a probe is needed at the start or end of the function. The
fprobe and kretprobe logic implements a similar method as the function
graph tracer to trace the end of the function. That is to hijack the
return address and jump to a trampoline to do the trace when the function
exits. To do this, a shadow stack needs to be created to store the
original return address. Fprobes and function graph do this slightly
differently. Fprobes (and kretprobes) has slots per callsite that are
reserved to save the return address. This is fine when just a few points
are traced. But users of fprobes, such as BPF programs, are starting to add
many more locations, and this method does not scale.
The function graph tracer was created to trace all functions in the
kernel. In order to do this, when function graph tracing is started, every
task gets its own shadow stack to hold the return address that is going to
be traced. The function graph tracer has been updated to allow multiple
users to use its infrastructure. Now have fprobes be one of those users.
This will also allow for the fprobe and kretprobe methods to trace the
return address to become obsolete. With new technologies like CFI that
need to know about these methods of hijacking the return address, going
toward a solution that has only one method of doing this will make the
kernel less complex.
- Cleanup with guard() and free() helpers
There were several places in the code that had a lot of "goto out" in the
error paths to either unlock a lock or free some memory that was
allocated. But this is error prone. Convert the code over to use the
guard() and free() helpers that let the compiler unlock locks or free
memory when the function exits.
- Remove disabling of interrupts in the function graph tracer
When function graph tracer was first introduced, it could race with
interrupts and NMIs. To prevent that race, it would disable interrupts and
not trace NMIs. But the code has changed to allow NMIs and also
interrupts. This change was done a long time ago, but the disabling of
interrupts was never removed. Remove the disabling of interrupts in the
function graph tracer is it is not needed. This greatly improves its
performance.
- Allow the :mod: command to enable tracing module functions on the kernel
command line.
The function tracer already has a way to enable functions to be traced in
modules by writing ":mod:<module>" into set_ftrace_filter. That will
enable either all the functions for the module if it is loaded, or if it
is not, it will cache that command, and when the module is loaded that
matches <module>, its functions will be enabled. This also allows init
functions to be traced. But currently events do not have that feature.
Because enabling function tracing can be done very early at boot up
(before scheduling is enabled), the commands that can be done when
function tracing is started is limited. Having the ":mod:" command to
trace module functions as they are loaded is very useful. Update the
kernel command line function filtering to allow it.
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Merge tag 'ftrace-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull ftrace updates from Steven Rostedt:
- Have fprobes built on top of function graph infrastructure
The fprobe logic is an optimized kprobe that uses ftrace to attach to
functions when a probe is needed at the start or end of the function.
The fprobe and kretprobe logic implements a similar method as the
function graph tracer to trace the end of the function. That is to
hijack the return address and jump to a trampoline to do the trace
when the function exits. To do this, a shadow stack needs to be
created to store the original return address. Fprobes and function
graph do this slightly differently. Fprobes (and kretprobes) has
slots per callsite that are reserved to save the return address. This
is fine when just a few points are traced. But users of fprobes, such
as BPF programs, are starting to add many more locations, and this
method does not scale.
The function graph tracer was created to trace all functions in the
kernel. In order to do this, when function graph tracing is started,
every task gets its own shadow stack to hold the return address that
is going to be traced. The function graph tracer has been updated to
allow multiple users to use its infrastructure. Now have fprobes be
one of those users. This will also allow for the fprobe and kretprobe
methods to trace the return address to become obsolete. With new
technologies like CFI that need to know about these methods of
hijacking the return address, going toward a solution that has only
one method of doing this will make the kernel less complex.
- Cleanup with guard() and free() helpers
There were several places in the code that had a lot of "goto out" in
the error paths to either unlock a lock or free some memory that was
allocated. But this is error prone. Convert the code over to use the
guard() and free() helpers that let the compiler unlock locks or free
memory when the function exits.
- Remove disabling of interrupts in the function graph tracer
When function graph tracer was first introduced, it could race with
interrupts and NMIs. To prevent that race, it would disable
interrupts and not trace NMIs. But the code has changed to allow NMIs
and also interrupts. This change was done a long time ago, but the
disabling of interrupts was never removed. Remove the disabling of
interrupts in the function graph tracer is it is not needed. This
greatly improves its performance.
- Allow the :mod: command to enable tracing module functions on the
kernel command line.
The function tracer already has a way to enable functions to be
traced in modules by writing ":mod:<module>" into set_ftrace_filter.
That will enable either all the functions for the module if it is
loaded, or if it is not, it will cache that command, and when the
module is loaded that matches <module>, its functions will be
enabled. This also allows init functions to be traced. But currently
events do not have that feature.
Because enabling function tracing can be done very early at boot up
(before scheduling is enabled), the commands that can be done when
function tracing is started is limited. Having the ":mod:" command to
trace module functions as they are loaded is very useful. Update the
kernel command line function filtering to allow it.
* tag 'ftrace-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (26 commits)
ftrace: Implement :mod: cache filtering on kernel command line
tracing: Adopt __free() and guard() for trace_fprobe.c
bpf: Use ftrace_get_symaddr() for kprobe_multi probes
ftrace: Add ftrace_get_symaddr to convert fentry_ip to symaddr
Documentation: probes: Update fprobe on function-graph tracer
selftests/ftrace: Add a test case for repeating register/unregister fprobe
selftests: ftrace: Remove obsolate maxactive syntax check
tracing/fprobe: Remove nr_maxactive from fprobe
fprobe: Add fprobe_header encoding feature
fprobe: Rewrite fprobe on function-graph tracer
s390/tracing: Enable HAVE_FTRACE_GRAPH_FUNC
ftrace: Add CONFIG_HAVE_FTRACE_GRAPH_FUNC
bpf: Enable kprobe_multi feature if CONFIG_FPROBE is enabled
tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS
tracing: Add ftrace_fill_perf_regs() for perf event
tracing: Add ftrace_partial_regs() for converting ftrace_regs to pt_regs
fprobe: Use ftrace_regs in fprobe exit handler
fprobe: Use ftrace_regs in fprobe entry handler
fgraph: Pass ftrace_regs to retfunc
fgraph: Replace fgraph_ret_regs with ftrace_regs
...
- Clean up the __rb_map_vma() logic
The logic of __rb_map_vma() has a error check with WARN_ON() that makes
sure that the index does not go past the end of the array of buffers. The
test in the loop pretty much guarantees that it will never happen, but
since the relation of the variables used is a little complex, the
WARN_ON() check was added. It was noticed that the array was dereferenced
before this check and if the logic does break and for some reason the
logic goes past the array, there will be an out of bounds access here.
Move the access to after the WARN_ON().
- Consolidate how the ring buffer is determined to be empty
Currently there's two ways that are used to determine if the ring buffer
is empty. One relies on the status of the commit and reader pages and what
was read, and the other is on what was written vs what was read. By using
the number of entries (written) method, it can be used for reading events
that are out of the kernel's control (what pKVM will use). Move to this
method to make it easier to implement a pKVM ring buffer that the kernel
can read.
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Merge tag 'trace-ringbuffer-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull trace ring-buffer updates from Steven Rostedt:
- Clean up the __rb_map_vma() logic
The logic of __rb_map_vma() has a error check with WARN_ON() that
makes sure that the index does not go past the end of the array of
buffers. The test in the loop pretty much guarantees that it will
never happen, but since the relation of the variables used is a
little complex, the WARN_ON() check was added. It was noticed that
the array was dereferenced before this check and if the logic does
break and for some reason the logic goes past the array, there will
be an out of bounds access here. Move the access to after the
WARN_ON().
- Consolidate how the ring buffer is determined to be empty
Currently there's two ways that are used to determine if the ring
buffer is empty. One relies on the status of the commit and reader
pages and what was read, and the other is on what was written vs what
was read. By using the number of entries (written) method, it can be
used for reading events that are out of the kernel's control (what
pKVM will use). Move to this method to make it easier to implement a
pKVM ring buffer that the kernel can read.
* tag 'trace-ringbuffer-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
ring-buffer: Make reading page consistent with the code logic
ring-buffer: Check for empty ring-buffer with rb_num_of_entries()
This pull request contains the following branches:
fixes.2024.12.14a: Misc fixes, check if IRQs are disabled in rcu_exp_need_qs(),
instrument KCSAN exclusive-writer assertions, add extra WARN_ON_ONCE() check,
set the cpu_no_qs.b.exp under lock, warn if callback enqueued on offline CPU.
rcutorture.2024.12.14a: Torture-test updates, add rcutorture.preempt_duration kernel
module parameter, make the TREE03 scenario do preemption, improve pooling timeouts
for rcu_torture_writer(), improve output of "Failure/close-call rcutorture reader
segments", add some reader-state debugging checks, update doc of polled APIs, add
extra diagnostics for per-reader-segment preemption.
srcu.2024.12.14a: SRCU updates, improve doc for srcu_read_lock() in terms of return
value, fix typo in comments, remove redundant GP sequence checks in the
srcu_funnel_gp_start.
torture-test.2024.12.14a: Add an extra test for sched_clock(), improve testing
on unresponsive systems.
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Merge tag 'rcu.release.v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux
Pull RCU updates from Uladzislau Rezki:
"Misc fixes:
- check if IRQs are disabled in rcu_exp_need_qs()
- instrument KCSAN exclusive-writer assertions
- add extra WARN_ON_ONCE() check
- set the cpu_no_qs.b.exp under lock
- warn if callback enqueued on offline CPU
Torture-test updates:
- add rcutorture.preempt_duration kernel module parameter
- make the TREE03 scenario do preemption
- improve pooling timeouts for rcu_torture_writer()
- improve output of "Failure/close-call rcutorture reader segments"
- add some reader-state debugging checks
- update doc of polled APIs
- add extra diagnostics for per-reader-segment preemption
- add an extra test for sched_clock()
- improve testing on unresponsive systems
SRCU updates:
- improve doc for srcu_read_lock() in terms of return value
- fix typo in comments
- remove redundant GP sequence checks in the srcu_funnel_gp_start"
* tag 'rcu.release.v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux: (31 commits)
srcu: Remove redundant GP sequence checks in srcu_funnel_gp_start
srcu: Fix typo s/srcu_check_read_flavor()/__srcu_check_read_flavor()/
srcu: Guarantee non-negative return value from srcu_read_lock()
MAINTAINERS: Update RCU git tree
rcu: Add lockdep_assert_irqs_disabled() to rcu_exp_need_qs()
rcu: Add KCSAN exclusive-writer assertions for rdp->cpu_no_qs.b.exp
rcu: Make preemptible rcu_exp_handler() check idempotency
rcu: Replace open-coded rcu_exp_need_qs() from rcu_exp_handler() with call
rcu: Move rcu_report_exp_rdp() setting of ->cpu_no_qs.b.exp under lock
rcu: Make rcu_report_exp_cpu_mult() caller acquire lock
rcu: Report callbacks enqueued on offline CPU blind spot
rcutorture: Use symbols for SRCU reader flavors
rcutorture: Add per-reader-segment preemption diagnostics
rcutorture: Read CPU ID for decoration protected by both reader types
rcutorture: Add preempt_count() to rcutorture_one_extend_check() diagnostics
rcutorture: Add parameters to control polled/conditional wait interval
rcutorture: Add documentation for recent conditional and polled APIs
rcutorture: Ignore attempts to test preemption and forward progress
rcutorture: Make rcutorture_one_extend() check reader state
rcutorture: Pretty-print rcutorture reader segments
...
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Merge tag 'slab-for-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab updates from Vlastimil Babka:
- Move the kfree_rcu() implementation from RCU to SLAB subsystem
(Uladzislau Rezki)
The kfree_rcu() implementation has been historically maintained in
the RCU subsystem. At LSF/MM we agreed to move it to SLAB, where it
more logically belongs. The batching is planned be more integrated
with SLUB internals in the future, while using the RCU APIs like any
other subsystem.
- Fix for kernel-doc warning (Randy Dunlap)
* tag 'slab-for-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
mm/slab: fix kernel-doc func param names
mm/slab: Move kvfree_rcu() into SLAB
rcu/kvfree: Adjust a shrinker name
rcu/kvfree: Adjust names passed into trace functions
rcu/kvfree: Move some functions under CONFIG_TINY_RCU
rcu/kvfree: Initialize kvfree_rcu() separately
- Consolidation of the machine_kexec_mask_interrupts() by providing a
generic implementation and replacing the copy & pasta orgy in the
relevant architectures.
- Prevent unconditional operations on interrupt chips during kexec
shutdown, which can trigger warnings in certain cases when the
underlying interrupt has been shut down before.
- Make the enforcement of interrupt handling in interrupt context
unconditionally available, so that it actually works for non x86
related interrupt chips. The earlier enablement for ARM GIC chips set
the required chip flag, but did not notice that the check was hidden
behind a config switch which is not selected by ARM[64].
- Decrapify the handling of deferred interrupt affinity setting. Some
interrupt chips require that affinity changes are made from the context
of handling an interrupt to avoid certain race conditions. For x86 this
was the default, but with interrupt remapping this requirement was
lifted and a flag was introduced which tells the core code that
affinity changes can be done in any context. Unrestricted affinity
changes are the default for the majority of interrupt chips. RISCV has
the requirement to add the deferred mode to one of it's interrupt
controllers, but with the original implementation this would require to
add the any context flag to all other RISC-V interrupt chips. That's
backwards, so reverse the logic and require that chips, which need the
deferred mode have to be marked accordingly. That avoids chasing the
'sane' chips and marking them.
- Add multi-node support to the Loongarch AVEC interrupt controller
driver.
- The usual tiny cleanups, fixes and improvements all over the place.
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Merge tag 'irq-core-2025-01-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull interrupt subsystem updates from Thomas Gleixner:
- Consolidate the machine_kexec_mask_interrupts() by providing a
generic implementation and replacing the copy & pasta orgy in the
relevant architectures.
- Prevent unconditional operations on interrupt chips during kexec
shutdown, which can trigger warnings in certain cases when the
underlying interrupt has been shut down before.
- Make the enforcement of interrupt handling in interrupt context
unconditionally available, so that it actually works for non x86
related interrupt chips. The earlier enablement for ARM GIC chips set
the required chip flag, but did not notice that the check was hidden
behind a config switch which is not selected by ARM[64].
- Decrapify the handling of deferred interrupt affinity setting.
Some interrupt chips require that affinity changes are made from the
context of handling an interrupt to avoid certain race conditions.
For x86 this was the default, but with interrupt remapping this
requirement was lifted and a flag was introduced which tells the core
code that affinity changes can be done in any context. Unrestricted
affinity changes are the default for the majority of interrupt chips.
RISCV has the requirement to add the deferred mode to one of it's
interrupt controllers, but with the original implementation this
would require to add the any context flag to all other RISC-V
interrupt chips. That's backwards, so reverse the logic and require
that chips, which need the deferred mode have to be marked
accordingly. That avoids chasing the 'sane' chips and marking them.
- Add multi-node support to the Loongarch AVEC interrupt controller
driver.
- The usual tiny cleanups, fixes and improvements all over the place.
* tag 'irq-core-2025-01-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/generic_chip: Export irq_gc_mask_disable_and_ack_set()
genirq/timings: Add kernel-doc for a function parameter
genirq: Remove IRQ_MOVE_PCNTXT and related code
x86/apic: Convert to IRQCHIP_MOVE_DEFERRED
genirq: Provide IRQCHIP_MOVE_DEFERRED
hexagon: Remove GENERIC_PENDING_IRQ leftover
ARC: Remove GENERIC_PENDING_IRQ
genirq: Remove handle_enforce_irqctx() wrapper
genirq: Make handle_enforce_irqctx() unconditionally available
irqchip/loongarch-avec: Add multi-nodes topology support
irqchip/ts4800: Replace seq_printf() by seq_puts()
irqchip/ti-sci-inta : Add module build support
irqchip/ti-sci-intr: Add module build support
irqchip/irq-brcmstb-l2: Replace brcmstb_l2_mask_and_ack() by generic function
irqchip: keystone: Use syscon_regmap_lookup_by_phandle_args
genirq/kexec: Prevent redundant IRQ masking by checking state before shutdown
kexec: Consolidate machine_kexec_mask_interrupts() implementation
genirq: Reuse irq_thread_fn() for forced thread case
genirq: Move irq_thread_fn() further up in the code
- Just boring cleanups, typo and comment fixes and trivial optimizations
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Merge tag 'timers-core-2025-01-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer and timekeeping updates from Thomas Gleixner:
- Just boring cleanups, typo and comment fixes and trivial optimizations
* tag 'timers-core-2025-01-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timers/migration: Simplify top level detection on group setup
timers: Optimize get_timer_[this_]cpu_base()
timekeeping: Remove unused ktime_get_fast_timestamps()
timer/migration: Fix kernel-doc warnings for union tmigr_state
tick/broadcast: Add kernel-doc for function parameters
hrtimers: Update the return type of enqueue_hrtimer()
clocksource/wdtest: Print time values for short udelay(1)
posix-timers: Fix typo in __lock_timer()
vdso: Correct typo in PAGE_SHIFT comment
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Merge tag 'livepatching-for-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching
Pull livepatching updates from Petr Mladek:
- Add a sysfs attribute showing the livepatch ordering
- Some code clean up
* tag 'livepatching-for-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching:
selftests: livepatch: add test cases of stack_order sysfs interface
livepatch: Add stack_order sysfs attribute
selftests/livepatch: Replace hardcoded module name with variable in test-callbacks.sh
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Merge tag 'printk-for-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek:
- Prevent possible deadlocks, caused by the lock serializing per-CPU
backtraces, by entering the deferred printk context
- Enforce the right casting in LOG_BUF_LEN_MAX definition
* tag 'printk-for-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
printk: Defer legacy printing when holding printk_cpu_sync
printk: Remove redundant deferred check in vprintk()
printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX
- Fair scheduler (SCHED_FAIR) enhancements:
- Behavioral improvements:
- Untangle NEXT_BUDDY and pick_next_task() (Peter Zijlstra)
- Delayed-dequeue enhancements & fixes: (Vincent Guittot)
- Rename h_nr_running into h_nr_queued
- Add new cfs_rq.h_nr_runnable
- Use the new cfs_rq.h_nr_runnable
- Removed unsued cfs_rq.h_nr_delayed
- Rename cfs_rq.idle_h_nr_running into h_nr_idle
- Remove unused cfs_rq.idle_nr_running
- Rename cfs_rq.nr_running into nr_queued
- Do not try to migrate delayed dequeue task
- Fix variable declaration position
- Encapsulate set custom slice in a __setparam_fair() function
- Fixes:
- Fix race between yield_to() and try_to_wake_up() (Tianchen Ding)
- Fix CPU bandwidth limit bypass during CPU hotplug (Vishal Chourasia)
- Cleanups:
- Clean up in migrate_degrades_locality() to improve
readability (Peter Zijlstra)
- Mark m*_vruntime() with __maybe_unused (Andy Shevchenko)
- Update comments after sched_tick() rename (Sebastian Andrzej Siewior)
- Remove CONFIG_CFS_BANDWIDTH=n definition of cfs_bandwidth_used()
(Valentin Schneider)
- Deadline scheduler (SCHED_DL) enhancements:
- Restore dl_server bandwidth on non-destructive root domain
changes (Juri Lelli)
- Correctly account for allocated bandwidth during
hotplug (Juri Lelli)
- Check bandwidth overflow earlier for hotplug (Juri Lelli)
- Clean up goto label in pick_earliest_pushable_dl_task()
(John Stultz)
- Consolidate timer cancellation (Wander Lairson Costa)
- Load-balancer enhancements:
- Improve performance by prioritizing migrating eligible
tasks in sched_balance_rq() (Hao Jia)
- Do not compute NUMA Balancing stats unnecessarily during
load-balancing (K Prateek Nayak)
- Do not compute overloaded status unnecessarily during
load-balancing (K Prateek Nayak)
- Generic scheduling code enhancements:
- Use READ_ONCE() in task_on_rq_queued(), to consistently use
the WRITE_ONCE() updated ->on_rq field (Harshit Agarwal)
- Isolated CPUs support enhancements: (Waiman Long)
- Make "isolcpus=nohz" equivalent to "nohz_full"
- Consolidate housekeeping cpumasks that are always identical
- Remove HK_TYPE_SCHED
- Unify HK_TYPE_{TIMER|TICK|MISC} to HK_TYPE_KERNEL_NOISE
- RSEQ enhancements:
- Validate read-only fields under DEBUG_RSEQ config
(Mathieu Desnoyers)
- PSI enhancements:
- Fix race when task wakes up before psi_sched_switch()
adjusts flags (Chengming Zhou)
- IRQ time accounting performance enhancements: (Yafang Shao)
- Define sched_clock_irqtime as static key
- Don't account irq time if sched_clock_irqtime is disabled
- Virtual machine scheduling enhancements:
- Don't try to catch up excess steal time (Suleiman Souhlal)
- Heterogenous x86 CPU scheduling enhancements: (K Prateek Nayak)
- Convert "sysctl_sched_itmt_enabled" to boolean
- Use guard() for itmt_update_mutex
- Move the "sched_itmt_enabled" sysctl to debugfs
- Remove x86_smt_flags and use cpu_smt_flags directly
- Use x86_sched_itmt_flags for PKG domain unconditionally
- Debugging code & instrumentation enhancements:
- Change need_resched warnings to pr_err() (David Rientjes)
- Print domain name in /proc/schedstat (K Prateek Nayak)
- Fix value reported by hot tasks pulled in /proc/schedstat (Peter Zijlstra)
- Report the different kinds of imbalances in /proc/schedstat (Swapnil Sapkal)
- Move sched domain name out of CONFIG_SCHED_DEBUG (Swapnil Sapkal)
- Update Schedstat version to 17 (Swapnil Sapkal)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2025-01-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"Fair scheduler (SCHED_FAIR) enhancements:
- Behavioral improvements:
- Untangle NEXT_BUDDY and pick_next_task() (Peter Zijlstra)
- Delayed-dequeue enhancements & fixes: (Vincent Guittot)
- Rename h_nr_running into h_nr_queued
- Add new cfs_rq.h_nr_runnable
- Use the new cfs_rq.h_nr_runnable
- Removed unsued cfs_rq.h_nr_delayed
- Rename cfs_rq.idle_h_nr_running into h_nr_idle
- Remove unused cfs_rq.idle_nr_running
- Rename cfs_rq.nr_running into nr_queued
- Do not try to migrate delayed dequeue task
- Fix variable declaration position
- Encapsulate set custom slice in a __setparam_fair() function
- Fixes:
- Fix race between yield_to() and try_to_wake_up() (Tianchen Ding)
- Fix CPU bandwidth limit bypass during CPU hotplug (Vishal
Chourasia)
- Cleanups:
- Clean up in migrate_degrades_locality() to improve readability
(Peter Zijlstra)
- Mark m*_vruntime() with __maybe_unused (Andy Shevchenko)
- Update comments after sched_tick() rename (Sebastian Andrzej
Siewior)
- Remove CONFIG_CFS_BANDWIDTH=n definition of cfs_bandwidth_used()
(Valentin Schneider)
Deadline scheduler (SCHED_DL) enhancements:
- Restore dl_server bandwidth on non-destructive root domain changes
(Juri Lelli)
- Correctly account for allocated bandwidth during hotplug (Juri
Lelli)
- Check bandwidth overflow earlier for hotplug (Juri Lelli)
- Clean up goto label in pick_earliest_pushable_dl_task() (John
Stultz)
- Consolidate timer cancellation (Wander Lairson Costa)
Load-balancer enhancements:
- Improve performance by prioritizing migrating eligible tasks in
sched_balance_rq() (Hao Jia)
- Do not compute NUMA Balancing stats unnecessarily during
load-balancing (K Prateek Nayak)
- Do not compute overloaded status unnecessarily during
load-balancing (K Prateek Nayak)
Generic scheduling code enhancements:
- Use READ_ONCE() in task_on_rq_queued(), to consistently use the
WRITE_ONCE() updated ->on_rq field (Harshit Agarwal)
Isolated CPUs support enhancements: (Waiman Long)
- Make "isolcpus=nohz" equivalent to "nohz_full"
- Consolidate housekeeping cpumasks that are always identical
- Remove HK_TYPE_SCHED
- Unify HK_TYPE_{TIMER|TICK|MISC} to HK_TYPE_KERNEL_NOISE
RSEQ enhancements:
- Validate read-only fields under DEBUG_RSEQ config (Mathieu
Desnoyers)
PSI enhancements:
- Fix race when task wakes up before psi_sched_switch() adjusts flags
(Chengming Zhou)
IRQ time accounting performance enhancements: (Yafang Shao)
- Define sched_clock_irqtime as static key
- Don't account irq time if sched_clock_irqtime is disabled
Virtual machine scheduling enhancements:
- Don't try to catch up excess steal time (Suleiman Souhlal)
Heterogenous x86 CPU scheduling enhancements: (K Prateek Nayak)
- Convert "sysctl_sched_itmt_enabled" to boolean
- Use guard() for itmt_update_mutex
- Move the "sched_itmt_enabled" sysctl to debugfs
- Remove x86_smt_flags and use cpu_smt_flags directly
- Use x86_sched_itmt_flags for PKG domain unconditionally
Debugging code & instrumentation enhancements:
- Change need_resched warnings to pr_err() (David Rientjes)
- Print domain name in /proc/schedstat (K Prateek Nayak)
- Fix value reported by hot tasks pulled in /proc/schedstat (Peter
Zijlstra)
- Report the different kinds of imbalances in /proc/schedstat
(Swapnil Sapkal)
- Move sched domain name out of CONFIG_SCHED_DEBUG (Swapnil Sapkal)
- Update Schedstat version to 17 (Swapnil Sapkal)"
* tag 'sched-core-2025-01-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (48 commits)
rseq: Fix rseq unregistration regression
psi: Fix race when task wakes up before psi_sched_switch() adjusts flags
sched, psi: Don't account irq time if sched_clock_irqtime is disabled
sched: Don't account irq time if sched_clock_irqtime is disabled
sched: Define sched_clock_irqtime as static key
sched/fair: Do not compute overloaded status unnecessarily during lb
sched/fair: Do not compute NUMA Balancing stats unnecessarily during lb
x86/topology: Use x86_sched_itmt_flags for PKG domain unconditionally
x86/topology: Remove x86_smt_flags and use cpu_smt_flags directly
x86/itmt: Move the "sched_itmt_enabled" sysctl to debugfs
x86/itmt: Use guard() for itmt_update_mutex
x86/itmt: Convert "sysctl_sched_itmt_enabled" to boolean
sched/core: Prioritize migrating eligible tasks in sched_balance_rq()
sched/debug: Change need_resched warnings to pr_err
sched/fair: Encapsulate set custom slice in a __setparam_fair() function
sched: Fix race between yield_to() and try_to_wake_up()
docs: Update Schedstat version to 17
sched/stats: Print domain name in /proc/schedstat
sched: Move sched domain name out of CONFIG_SCHED_DEBUG
sched: Report the different kinds of imbalances in /proc/schedstat
...
of the "disablelapic" boot parameter.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-cleanups-2025-01-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cleanups from Ingo Molnar:
"Miscellaneous x86 cleanups and typo fixes, and also the removal of
the 'disablelapic' boot parameter"
* tag 'x86-cleanups-2025-01-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ioapic: Remove a stray tab in the IO-APIC type string
x86/cpufeatures: Remove "AMD" from the comments to the AMD-specific leaf
Documentation/kernel-parameters: Fix a typo in kvm.enable_virt_at_load text
x86/cpu: Fix typo in x86_match_cpu()'s doc
x86/apic: Remove "disablelapic" cmdline option
Documentation: Merge x86-specific boot options doc into kernel-parameters.txt
x86/ioremap: Remove unused size parameter in remapping functions
x86/ioremap: Simplify setup_data mapping variants
x86/boot/compressed: Remove unused header includes from kaslr.c
- Seqlock optimizations that arose in a perf context and were
merged into the perf tree:
- seqlock: Add raw_seqcount_try_begin (Suren Baghdasaryan)
- mm: Convert mm_lock_seq to a proper seqcount ((Suren Baghdasaryan)
- mm: Introduce mmap_lock_speculate_{try_begin|retry} (Suren Baghdasaryan)
- mm/gup: Use raw_seqcount_try_begin() (Peter Zijlstra)
- Core perf enhancements:
- Reduce 'struct page' footprint of perf by mapping pages
in advance (Lorenzo Stoakes)
- Save raw sample data conditionally based on sample type (Yabin Cui)
- Reduce sampling overhead by checking sample_type in
perf_sample_save_callchain() and perf_sample_save_brstack() (Yabin Cui)
- Export perf_exclude_event() (Namhyung Kim)
- Uprobes scalability enhancements: (Andrii Nakryiko)
- Simplify find_active_uprobe_rcu() VMA checks
- Add speculative lockless VMA-to-inode-to-uprobe resolution
- Simplify session consumer tracking
- Decouple return_instance list traversal and freeing
- Ensure return_instance is detached from the list before freeing
- Reuse return_instances between multiple uretprobes within task
- Guard against kmemdup() failing in dup_return_instance()
- AMD core PMU driver enhancements:
- Relax privilege filter restriction on AMD IBS (Namhyung Kim)
- AMD RAPL energy counters support: (Dhananjay Ugwekar)
- Introduce topology_logical_core_id() (K Prateek Nayak)
- Remove the unused get_rapl_pmu_cpumask() function
- Remove the cpu_to_rapl_pmu() function
- Rename rapl_pmu variables
- Make rapl_model struct global
- Add arguments to the init and cleanup functions
- Modify the generic variable names to *_pkg*
- Remove the global variable rapl_msrs
- Move the cntr_mask to rapl_pmus struct
- Add core energy counter support for AMD CPUs
- Intel core PMU driver enhancements:
- Support RDPMC 'metrics clear mode' feature (Kan Liang)
- Clarify adaptive PEBS processing (Kan Liang)
- Factor out functions for PEBS records processing (Kan Liang)
- Simplify the PEBS records processing for adaptive PEBS (Kan Liang)
- Intel uncore driver enhancements: (Kan Liang)
- Convert buggy pmu->func_id use to pmu->registered
- Support more units on Granite Rapids
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-core-2025-01-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull performance events updates from Ingo Molnar:
"Seqlock optimizations that arose in a perf context and were merged
into the perf tree:
- seqlock: Add raw_seqcount_try_begin (Suren Baghdasaryan)
- mm: Convert mm_lock_seq to a proper seqcount (Suren Baghdasaryan)
- mm: Introduce mmap_lock_speculate_{try_begin|retry} (Suren
Baghdasaryan)
- mm/gup: Use raw_seqcount_try_begin() (Peter Zijlstra)
Core perf enhancements:
- Reduce 'struct page' footprint of perf by mapping pages in advance
(Lorenzo Stoakes)
- Save raw sample data conditionally based on sample type (Yabin Cui)
- Reduce sampling overhead by checking sample_type in
perf_sample_save_callchain() and perf_sample_save_brstack() (Yabin
Cui)
- Export perf_exclude_event() (Namhyung Kim)
Uprobes scalability enhancements: (Andrii Nakryiko)
- Simplify find_active_uprobe_rcu() VMA checks
- Add speculative lockless VMA-to-inode-to-uprobe resolution
- Simplify session consumer tracking
- Decouple return_instance list traversal and freeing
- Ensure return_instance is detached from the list before freeing
- Reuse return_instances between multiple uretprobes within task
- Guard against kmemdup() failing in dup_return_instance()
AMD core PMU driver enhancements:
- Relax privilege filter restriction on AMD IBS (Namhyung Kim)
AMD RAPL energy counters support: (Dhananjay Ugwekar)
- Introduce topology_logical_core_id() (K Prateek Nayak)
- Remove the unused get_rapl_pmu_cpumask() function
- Remove the cpu_to_rapl_pmu() function
- Rename rapl_pmu variables
- Make rapl_model struct global
- Add arguments to the init and cleanup functions
- Modify the generic variable names to *_pkg*
- Remove the global variable rapl_msrs
- Move the cntr_mask to rapl_pmus struct
- Add core energy counter support for AMD CPUs
Intel core PMU driver enhancements:
- Support RDPMC 'metrics clear mode' feature (Kan Liang)
- Clarify adaptive PEBS processing (Kan Liang)
- Factor out functions for PEBS records processing (Kan Liang)
- Simplify the PEBS records processing for adaptive PEBS (Kan Liang)
Intel uncore driver enhancements: (Kan Liang)
- Convert buggy pmu->func_id use to pmu->registered
- Support more units on Granite Rapids"
* tag 'perf-core-2025-01-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
perf: map pages in advance
perf/x86/intel/uncore: Support more units on Granite Rapids
perf/x86/intel/uncore: Clean up func_id
perf/x86/intel: Support RDPMC metrics clear mode
uprobes: Guard against kmemdup() failing in dup_return_instance()
perf/x86: Relax privilege filter restriction on AMD IBS
perf/core: Export perf_exclude_event()
uprobes: Reuse return_instances between multiple uretprobes within task
uprobes: Ensure return_instance is detached from the list before freeing
uprobes: Decouple return_instance list traversal and freeing
uprobes: Simplify session consumer tracking
uprobes: add speculative lockless VMA-to-inode-to-uprobe resolution
uprobes: simplify find_active_uprobe_rcu() VMA checks
mm: introduce mmap_lock_speculate_{try_begin|retry}
mm: convert mm_lock_seq to a proper seqcount
mm/gup: Use raw_seqcount_try_begin()
seqlock: add raw_seqcount_try_begin
perf/x86/rapl: Add core energy counter support for AMD CPUs
perf/x86/rapl: Move the cntr_mask to rapl_pmus struct
perf/x86/rapl: Remove the global variable rapl_msrs
...
- Lockdep:
- Improve and fix lockdep bitsize limits, clarify the Kconfig
documentation (Carlos Llamas)
- Fix lockdep build warning on Clang related to
chain_hlock_class_idx() inlining (Andy Shevchenko)
- Relax the requirements of PROVE_RAW_LOCK_NESTING arch support
by not tying it to ARCH_SUPPORTS_RT unnecessarily (Waiman Long)
- Rust integration:
- Support lock pointers managed by the C side (Lyude Paul)
- Support guard types (Lyude Paul)
- Update MAINTAINERS file filters to include the
Rust locking code (Boqun Feng)
- Wake-queues:
- Add raw_spin_*wake() helpers to simplify locking code (John Stultz)
- SMP cross-calls:
- Fix potential data update race by evaluating the local cond_func()
before IPI side-effects (Mathieu Desnoyers)
- Guard primitives:
- Ease [c]tags based searches by including the cleanup/guard type
primitives (Peter Zijlstra)
- ww_mutexes:
- Simplify the ww_mutex self-test code via swap() (Thorsten Blum)
- Static calls:
- Update the static calls MAINTAINERS file-pattern (Jiri Slaby)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-core-2025-01-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"Lockdep:
- Improve and fix lockdep bitsize limits, clarify the Kconfig
documentation (Carlos Llamas)
- Fix lockdep build warning on Clang related to
chain_hlock_class_idx() inlining (Andy Shevchenko)
- Relax the requirements of PROVE_RAW_LOCK_NESTING arch support by
not tying it to ARCH_SUPPORTS_RT unnecessarily (Waiman Long)
Rust integration:
- Support lock pointers managed by the C side (Lyude Paul)
- Support guard types (Lyude Paul)
- Update MAINTAINERS file filters to include the Rust locking code
(Boqun Feng)
Wake-queues:
- Add raw_spin_*wake() helpers to simplify locking code (John Stultz)
SMP cross-calls:
- Fix potential data update race by evaluating the local cond_func()
before IPI side-effects (Mathieu Desnoyers)
Guard primitives:
- Ease [c]tags based searches by including the cleanup/guard type
primitives (Peter Zijlstra)
ww_mutexes:
- Simplify the ww_mutex self-test code via swap() (Thorsten Blum)
Static calls:
- Update the static calls MAINTAINERS file-pattern (Jiri Slaby)"
* tag 'locking-core-2025-01-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
MAINTAINERS: Add static_call_inline.c to STATIC BRANCH/CALL
cleanup, tags: Create tags for the cleanup primitives
sched/wake_q: Add helper to call wake_up_q after unlock with preemption disabled
rust: sync: Add lock::Backend::assert_is_held()
rust: sync: Add SpinLockGuard type alias
rust: sync: Add MutexGuard type alias
rust: sync: Make Guard::new() public
rust: sync: Add Lock::from_raw() for Lock<(), B>
locking: MAINTAINERS: Start watching Rust locking primitives
lockdep: Move lockdep_assert_locked() under #ifdef CONFIG_PROVE_LOCKING
lockdep: Mark chain_hlock_class_idx() with __maybe_unused
lockdep: Document MAX_LOCKDEP_CHAIN_HLOCKS calculation
lockdep: Clarify size for LOCKDEP_*_BITS configs
lockdep: Fix upper limit for LOCKDEP_*_BITS configs
locking/ww_mutex/test: Use swap() macro
smp/scf: Evaluate local cond_func() before IPI side-effects
locking/lockdep: Enforce PROVE_RAW_LOCK_NESTING only if ARCH_SUPPORTS_RT
which is legacy now, and the creation of the new AMD node concept which
represents the Zen architecture of having a collection of I/O devices within
an SoC. Those nodes comprise the so-called data fabric on Zen. This has
at least one practical advantage of not having to add a PCI ID each time
a new data fabric PCI device releases. Eventually, the lot more uniform
provider of data fabric functionality amd_node.c will be used by all the
drivers which need it
- Smaller cleanups
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Merge tag 'x86_misc_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 updates from Borislav Petkov:
- The first part of a restructuring of AMD's representation of a
northbridge which is legacy now, and the creation of the new AMD node
concept which represents the Zen architecture of having a collection
of I/O devices within an SoC. Those nodes comprise the so-called data
fabric on Zen.
This has at least one practical advantage of not having to add a PCI
ID each time a new data fabric PCI device releases. Eventually, the
lot more uniform provider of data fabric functionality amd_node.c
will be used by all the drivers which need it
- Smaller cleanups
* tag 'x86_misc_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/amd_node: Use defines for SMN register offsets
x86/amd_node: Remove dependency on AMD_NB
x86/amd_node: Update __amd_smn_rw() error paths
x86/amd_nb: Move SMN access code to a new amd_node driver
x86/amd_nb, hwmon: (k10temp): Simplify amd_pci_dev_to_node_id()
x86/amd_nb: Simplify function 3 search
x86/amd_nb: Use topology info to get AMD node count
x86/amd_nb: Simplify root device search
x86/amd_nb: Simplify function 4 search
x86: Start moving AMD node functionality out of AMD_NB
x86/amd_nb: Clean up early_is_amd_nb()
x86/amd_nb: Restrict init function to AMD-based systems
x86/mtrr: Rename mtrr_overwrite_state() to guest_force_mtrr_state()
use the generic struct x86_cpu_id thing
- Remove magic naked numbers for CPUID functions and use proper defines of the
prefix CPUID_LEAF_*. Consolidate some of the crazy use around the tree
- Smaller cleanups and improvements
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Merge tag 'x86_cpu_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cpuid updates from Borislav Petkov:
- Remove the less generic CPU matching infra around struct x86_cpu_desc
and use the generic struct x86_cpu_id thing
- Remove magic naked numbers for CPUID functions and use proper defines
of the prefix CPUID_LEAF_*. Consolidate some of the crazy use around
the tree
- Smaller cleanups and improvements
* tag 'x86_cpu_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Make all all CPUID leaf names consistent
x86/fpu: Remove unnecessary CPUID level check
x86/fpu: Move CPUID leaf definitions to common code
x86/tsc: Remove CPUID "frequency" leaf magic numbers.
x86/tsc: Move away from TSC leaf magic numbers
x86/cpu: Move TSC CPUID leaf definition
x86/cpu: Refresh DCA leaf reading code
x86/cpu: Remove unnecessary MwAIT leaf checks
x86/cpu: Use MWAIT leaf definition
x86/cpu: Move MWAIT leaf definition to common header
x86/cpu: Remove 'x86_cpu_desc' infrastructure
x86/cpu: Move AMD erratum 1386 table over to 'x86_cpu_id'
x86/cpu: Replace PEBS use of 'x86_cpu_desc' use with 'x86_cpu_id'
x86/cpu: Expose only stepping min/max interface
x86/cpu: Introduce new microcode matching helper
x86/cpufeature: Document cpu_feature_enabled() as the default to use
x86/paravirt: Remove the WBINVD callback
x86/cpufeatures: Free up unused feature bits
table of sorts which contains per-node descriptors of each node-local
4K page, denoting its ownership (hypervisor, guest, etc) in the realm
of confidential computing. Add support for such a table in order to
improve referential locality when accessing or modifying RMP table
entries
- Add support for reading the TSC in SNP guests by removing any
interference or influence the hypervisor might have, with the goal of
making a confidential guest even more independent from the hypervisor
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Merge tag 'x86_sev_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 SEV updates from Borislav Petkov:
- A segmented Reverse Map table (RMP) is a across-nodes distributed
table of sorts which contains per-node descriptors of each node-local
4K page, denoting its ownership (hypervisor, guest, etc) in the realm
of confidential computing. Add support for such a table in order to
improve referential locality when accessing or modifying RMP table
entries
- Add support for reading the TSC in SNP guests by removing any
interference or influence the hypervisor might have, with the goal of
making a confidential guest even more independent from the hypervisor
* tag 'x86_sev_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/sev: Add the Secure TSC feature for SNP guests
x86/tsc: Init the TSC for Secure TSC guests
x86/sev: Mark the TSC in a secure TSC guest as reliable
x86/sev: Prevent RDTSC/RDTSCP interception for Secure TSC enabled guests
x86/sev: Prevent GUEST_TSC_FREQ MSR interception for Secure TSC enabled guests
x86/sev: Change TSC MSR behavior for Secure TSC enabled guests
x86/sev: Add Secure TSC support for SNP guests
x86/sev: Relocate SNP guest messaging routines to common code
x86/sev: Carve out and export SNP guest messaging init routines
virt: sev-guest: Replace GFP_KERNEL_ACCOUNT with GFP_KERNEL
virt: sev-guest: Remove is_vmpck_empty() helper
x86/sev/docs: Document the SNP Reverse Map Table (RMP)
x86/sev: Add full support for a segmented RMP table
x86/sev: Treat the contiguous RMP table as a single RMP segment
x86/sev: Map only the RMP table entries instead of the full RMP range
x86/sev: Move the SNP probe routine out of the way
x86/sev: Require the RMPREAD instruction after Zen4
x86/sev: Add support for the RMPREAD instruction
x86/sev: Prepare for using the RMPREAD instruction to access the RMP
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Merge tag 'x86_microcode_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 microcode loader updates from Borislav Petkov:
- A bunch of minor cleanups
* tag 'x86_microcode_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/microcode/AMD: Remove ret local var in early_apply_microcode()
x86/microcode/AMD: Have __apply_microcode_amd() return bool
x86/microcode/AMD: Make __verify_patch_size() return bool
x86/microcode/AMD: Remove bogus comment from parse_container()
x86/microcode/AMD: Return bool from find_blobs_in_containers()
thus accomodating systems which support only total but not local memory
bandwidth monitoring. Add the respective new mount options
- The usual cleanups
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Merge tag 'x86_cache_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 resource control updates from Borislav Petkov:
- Extend resctrl with the capability of total memory bandwidth
monitoring, thus accomodating systems which support only total but
not local memory bandwidth monitoring. Add the respective new mount
options
- The usual cleanups
* tag 'x86_cache_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/resctrl: Document the new "mba_MBps_event" file
x86/resctrl: Add write option to "mba_MBps_event" file
x86/resctrl: Add "mba_MBps_event" file to CTRL_MON directories
x86/resctrl: Make mba_sc use total bandwidth if local is not supported
x86/resctrl: Compute memory bandwidth for all supported events
x86/resctrl: Modify update_mba_bw() to use per CTRL_MON group event
x86/resctrl: Prepare for per-CTRL_MON group mba_MBps control
x86/resctrl: Introduce resctrl_file_fflags_init() to initialize fflags
x86/resctrl: Use kthread_run_on_cpu()
user/kernel attack vector and advertise it to guest userspace
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Merge tag 'x86_bugs_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 CPU speculation update from Borislav Petkov:
- Add support for AMD hardware which is not affected by SRSO on the
user/kernel attack vector and advertise it to guest userspace
* tag 'x86_bugs_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
KVM: x86: Advertise SRSO_USER_KERNEL_NO to userspace
x86/bugs: Add SRSO_USER_KERNEL_NO support
blades support
- Add a new EDAC driver for Loongson SoCs which reports single-bit correctable
errors
- Extend the SKX and i10NM EDAC drivers to support UV systems which can have
more than 8 nodes
- Add Intel Clearwater Forest server support to i10nm_edac
- Minor fix
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Merge tag 'edac_updates_for_v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras
Pull EDAC updates from Borislav Petkov:
- Remove the EDAC PowerPC Cell driver due to the removal of the IBM
Cell blades support
- Add a new EDAC driver for Loongson SoCs which reports single-bit
correctable errors
- Extend the SKX and i10NM EDAC drivers to support UV systems which can
have more than 8 nodes
- Add Intel Clearwater Forest server support to i10nm_edac
- Minor fix
* tag 'edac_updates_for_v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
EDAC/cell: Remove powerpc Cell driver
EDAC: Add an EDAC driver for the Loongson memory controller
EDAC: Fix typos in comments
EDAC/{i10nm,skx,skx_common}: Support UV systems
EDAC/i10nm: Add Intel Clearwater Forest server support
- Cleanup and sanitize MCA code
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Merge tag 'ras_core_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 RAS updates from Borislav Petkov:
- Remove the shared threshold bank hack on AMD and streamline and
simplify it
- Cleanup and sanitize MCA code
* tag 'ras_core_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mce/amd: Remove shared threshold bank plumbing
x86/mce: Remove the redundant mce_hygon_feature_init()
x86/mce: Convert family/model mixed checks to VFM-based checks
x86/mce: Break up __mcheck_cpu_apply_quirks()
x86/mce: Make four functions return bool
x86/mce/threshold: Remove the redundant this_cpu_dec_return()
x86/mce: Make several functions return bool
A logic inversion in rseq_reset_rseq_cpu_node_id() causes the rseq
unregistration to fail when rseq_validate_ro_fields() succeeds rather
than the opposite.
This affects both CONFIG_DEBUG_RSEQ=y and CONFIG_DEBUG_RSEQ=n.
Fixes: 7d5265ffcd ("rseq: Validate read-only fields under DEBUG_RSEQ config")
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250116205956.836074-1-mathieu.desnoyers@efficios.com
- Add preempt lazy support
- Deprecate cxl and cxl flash driver
- Fix a possible IOMMU related OOPS at boot on pSeries
- Optimize sched_clock() in ppc32 by replacing mulhdu() by mul_u64_u64_shr()
Thanks to: Andrew Donnellan, Andy Shevchenko, Ankur Arora, Christophe Leroy,
Frederic Barrat, Gaurav Batra, Luis Felipe Hernandez, Michael Ellerman, Nilay
Shroff, Ricardo B. Marliere, Ritesh Harjani (IBM), Sebastian Andrzej Siewior,
Shrikanth Hegde, Sourabh Jain, Thorsten Blum, Zhu Jun.
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Merge tag 'powerpc-6.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Madhavan Srinivasan:
- Add preempt lazy support
- Deprecate cxl and cxl flash driver
- Fix a possible IOMMU related OOPS at boot on pSeries
- Optimize sched_clock() in ppc32 by replacing mulhdu() by
mul_u64_u64_shr()
Thanks to Andrew Donnellan, Andy Shevchenko, Ankur Arora, Christophe
Leroy, Frederic Barrat, Gaurav Batra, Luis Felipe Hernandez, Michael
Ellerman, Nilay Shroff, Ricardo B. Marliere, Ritesh Harjani (IBM),
Sebastian Andrzej Siewior, Shrikanth Hegde, Sourabh Jain, Thorsten Blum,
and Zhu Jun.
* tag 'powerpc-6.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
selftests/powerpc: Fix argument order to timer_sub()
powerpc/prom_init: Use IS_ENABLED()
powerpc/pseries/iommu: IOMMU incorrectly marks MMIO range in DDW
powerpc: Use str_on_off() helper in check_cache_coherency()
powerpc: Large user copy aware of full:rt:lazy preemption
powerpc: Add preempt lazy support
powerpc/book3s64/hugetlb: Fix disabling hugetlb when fadump is active
powerpc/vdso: Mark the vDSO code read-only after init
powerpc/64: Use get_user() in start_thread()
macintosh: declare ctl_table as const
selftest/powerpc/ptrace: Cleanup duplicate macro definitions
selftest/powerpc/ptrace/ptrace-pkey: Remove duplicate macros
selftest/powerpc/ptrace/core-pkey: Remove duplicate macros
powerpc/8xx: Drop legacy-of-mm-gpiochip.h header
scsi/cxlflash: Deprecate driver
cxl: Deprecate driver
selftests/powerpc: Fix typo in test-vphn.c
powerpc/xmon: Use str_yes_no() helper in dump_one_paca()
powerpc/32: Replace mulhdu() by mul_u64_u64_shr()
Confidential Computing:
* Register a platform device when running in CCA realm mode to enable
automatic loading of dependent modules.
CPU Features:
* Update a bunch of system register definitions to pick up new field
encodings from the architectural documentation.
* Add hwcaps and selftests for the new (2024) dpISA extensions.
Documentation:
* Update EL3 (firmware) requirements for booting Linux on modern arm64
designs.
* Remove stale information about the kernel virtual memory map.
Miscellaneous:
* Minor cleanups and typo fixes.
Memory management:
* Fix vmemmap_check_pmd() to look at the PMD type bits
* LPA2 (52-bit physical addressing) cleanups and minor fixes.
* Adjust physical address space depending upon whether or not LPA2 is
enabled.
Perf and PMUs:
* Add port filtering support for NVIDIA's NVLINK-C2C Coresight PMU
* Extend AXI filtering support for the DDR PMU on NXP IMX SoCs
* Fix Designware PCIe PMU event numbering.
* Add generic branch events for the Apple M1 CPU PMU.
* Add support for Marvell Odyssey DDR and LLC-TAD PMUs.
* Cleanups to the Hisilicon DDRC and Uncore PMU code.
* Advertise discard mode for the SPE PMU.
* Add the perf users mailing list to our MAINTAINERS entry.
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"We've got a little less than normal thanks to the holidays in
December, but there's the usual summary below. The highlight is
probably the 52-bit physical addressing (LPA2) clean-up from Ard.
Confidential Computing:
- Register a platform device when running in CCA realm mode to enable
automatic loading of dependent modules
CPU Features:
- Update a bunch of system register definitions to pick up new field
encodings from the architectural documentation
- Add hwcaps and selftests for the new (2024) dpISA extensions
Documentation:
- Update EL3 (firmware) requirements for booting Linux on modern
arm64 designs
- Remove stale information about the kernel virtual memory map
Miscellaneous:
- Minor cleanups and typo fixes
Memory management:
- Fix vmemmap_check_pmd() to look at the PMD type bits
- LPA2 (52-bit physical addressing) cleanups and minor fixes
- Adjust physical address space depending upon whether or not LPA2 is
enabled
Perf and PMUs:
- Add port filtering support for NVIDIA's NVLINK-C2C Coresight PMU
- Extend AXI filtering support for the DDR PMU on NXP IMX SoCs
- Fix Designware PCIe PMU event numbering
- Add generic branch events for the Apple M1 CPU PMU
- Add support for Marvell Odyssey DDR and LLC-TAD PMUs
- Cleanups to the Hisilicon DDRC and Uncore PMU code
- Advertise discard mode for the SPE PMU
- Add the perf users mailing list to our MAINTAINERS entry"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (64 commits)
Documentation: arm64: Remove stale and redundant virtual memory diagrams
perf docs: arm_spe: Document new discard mode
perf: arm_spe: Add format option for discard mode
MAINTAINERS: Add perf list for drivers/perf/
arm64: Remove duplicate included header
drivers/perf: apple_m1: Map generic branch events
arm64: rsi: Add automatic arm-cca-guest module loading
kselftest/arm64: Add 2024 dpISA extensions to hwcap test
KVM: arm64: Allow control of dpISA extensions in ID_AA64ISAR3_EL1
arm64/hwcap: Describe 2024 dpISA extensions to userspace
arm64/sysreg: Update ID_AA64SMFR0_EL1 to DDI0601 2024-12
arm64: Filter out SVE hwcaps when FEAT_SVE isn't implemented
drivers/perf: hisi: Set correct IRQ affinity for PMUs with no association
arm64/sme: Move storage of reg_smidr to __cpuinfo_store_cpu()
arm64: mm: Test for pmd_sect() in vmemmap_check_pmd()
arm64/mm: Replace open encodings with PXD_TABLE_BIT
arm64/mm: Rename pte_mkpresent() as pte_mkvalid()
arm64/sysreg: Update ID_AA64ISAR2_EL1 to DDI0601 2024-09
arm64/sysreg: Update ID_AA64ZFR0_EL1 to DDI0601 2024-09
arm64/sysreg: Update ID_AA64FPFR0_EL1 to DDI0601 2024-09
...
- Use the generic muldi3 libgcc function,
- Miscellaneous fixes and improvements.
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Merge tag 'm68k-for-v6.14-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k updates from Geert Uytterhoeven:
- Use the generic muldi3 libgcc function
- Miscellaneous fixes and improvements
* tag 'm68k-for-v6.14-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k: libgcc: Fix lvalue abuse in umul_ppmm()
m68k: vga: Fix I/O defines
zorro: Constify 'struct bin_attribute'
m68k: atari: Use str_on_off() helper in atari_nvram_proc_read()
m68k: Use kernel's generic muldi3 libgcc function
- Select config option KASAN_VMALLOC if KASAN is enabled
- Select config option VMAP_STACK unconditionally
- Implement arch_atomic_inc() / arch_atomic_dec() functions
which result in a single instruction if compiled for z196
or newer architectures
- Make layering between atomic.h and atomic_ops.h consistent
- Comment s390 preempt_count implementation
- Remove pre MARCH_HAS_Z196_FEATURES preempt count implementation
- GCC uses the number of lines of an inline assembly to calculate
number of instructions and decide on inlining. Therefore remove
superfluous new lines from a couple of inline assemblies.
- Provide arch_atomic_*_and_test() implementations that allow the
compiler to generate slightly better code.
- Optimize __preempt_count_dec_and_test()
- Remove __bootdata annotations from declarations in header files
- Add missing include of <linux/smp.h> in abs_lowcore.h to provide
declarations for get_cpu() and put_cpu() used in the code
- Fix suboptimal kernel image base when running make kasan.config
- Remove huge_pte_none() and huge_pte_none_mostly() as are identical
to the generic variants
- Remove unused PAGE_KERNEL_EXEC, SEGMENT_KERNEL_EXEC,
and REGION3_KERNEL_EXEC defines
- Simplify noexec page protection handling and change the page,
segment and region3 protection definitions automatically if the
instruction execution-protection facility is not available
- Save one instruction and prefer EXRL instruction over EX in
string, xor_*(), amode31 and other functions
- Create /dev/diag misc device to fetch diagnose specific
information from the kernel and provide it to userspace
- Retrieve electrical power readings using DIAGNOSE 0x324 ioctl
- Make ccw_device_get_ciw() consistent and use array indices
instead of pointer arithmetic
* s390/qdio: Move memory alloc/pointer arithmetic for slib and sl into one place
- The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that in s390 code
- Add missing TLB range adjustment in pud_free_tlb()
- Improve topology setup by adding early polarization detection
- Fix length checks in codepage_convert() function
- The generic bitops implementation is nearly identical to the s390 one.
Switch to the generic variant and decrease a bit the kernel image size
- Provide an optimized arch_test_bit() implementation which makes use of
flag output constraint. This generates slightly better code
- Provide memory topology information obtanied with DIAGNOSE 0x310
using ioctl.
- Various other small improvements, fixes, and cleanups
These changes were added with a merge of 'pci-device-recovery' branch
- Add PCI error recovery status mechanism
- Simplify and document debug_next_entry() logic
- Split private data allocation and freeing out of debug file
open() and close() operations
- Add debug_dump() function that gets a textual representation
of a debug info (e.g. PCI recovery hardware error logs)
- Add formatted content of pci_debug_msg_id to the PCI report
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Merge tag 's390-6.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Alexander Gordeev:
- Select config option KASAN_VMALLOC if KASAN is enabled
- Select config option VMAP_STACK unconditionally
- Implement arch_atomic_inc() / arch_atomic_dec() functions which
result in a single instruction if compiled for z196 or newer
architectures
- Make layering between atomic.h and atomic_ops.h consistent
- Comment s390 preempt_count implementation
- Remove pre MARCH_HAS_Z196_FEATURES preempt count implementation
- GCC uses the number of lines of an inline assembly to calculate
number of instructions and decide on inlining. Therefore remove
superfluous new lines from a couple of inline assemblies.
- Provide arch_atomic_*_and_test() implementations that allow the
compiler to generate slightly better code.
- Optimize __preempt_count_dec_and_test()
- Remove __bootdata annotations from declarations in header files
- Add missing include of <linux/smp.h> in abs_lowcore.h to provide
declarations for get_cpu() and put_cpu() used in the code
- Fix suboptimal kernel image base when running make kasan.config
- Remove huge_pte_none() and huge_pte_none_mostly() as are identical to
the generic variants
- Remove unused PAGE_KERNEL_EXEC, SEGMENT_KERNEL_EXEC, and
REGION3_KERNEL_EXEC defines
- Simplify noexec page protection handling and change the page, segment
and region3 protection definitions automatically if the instruction
execution-protection facility is not available
- Save one instruction and prefer EXRL instruction over EX in string,
xor_*(), amode31 and other functions
- Create /dev/diag misc device to fetch diagnose specific information
from the kernel and provide it to userspace
- Retrieve electrical power readings using DIAGNOSE 0x324 ioctl
- Make ccw_device_get_ciw() consistent and use array indices instead of
pointer arithmetic
- s390/qdio: Move memory alloc/pointer arithmetic for slib and sl into
one place
- The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that in s390 code
- Add missing TLB range adjustment in pud_free_tlb()
- Improve topology setup by adding early polarization detection
- Fix length checks in codepage_convert() function
- The generic bitops implementation is nearly identical to the s390
one. Switch to the generic variant and decrease a bit the kernel
image size
- Provide an optimized arch_test_bit() implementation which makes use
of flag output constraint. This generates slightly better code
- Provide memory topology information obtanied with DIAGNOSE 0x310
using ioctl.
- Various other small improvements, fixes, and cleanups
Also, some changes came in through a merge of 'pci-device-recovery'
branch:
- Add PCI error recovery status mechanism
- Simplify and document debug_next_entry() logic
- Split private data allocation and freeing out of debug file open()
and close() operations
- Add debug_dump() function that gets a textual representation of a
debug info (e.g. PCI recovery hardware error logs)
- Add formatted content of pci_debug_msg_id to the PCI report
* tag 's390-6.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (48 commits)
s390/futex: Fix FUTEX_OP_ANDN implementation
s390/diag: Add memory topology information via diag310
s390/bitops: Provide optimized arch_test_bit()
s390/bitops: Switch to generic bitops
s390/ebcdic: Fix length decrement in codepage_convert()
s390/ebcdic: Fix length check in codepage_convert()
s390/ebcdic: Use exrl instead of ex
s390/amode31: Use exrl instead of ex
s390/stackleak: Use exrl instead of ex in __stackleak_poison()
s390/lib: Use exrl instead of ex in xor functions
s390/topology: Improve topology detection
s390/tlb: Add missing TLB range adjustment
s390/pkey: Constify 'struct bin_attribute'
s390/sclp: Constify 'struct bin_attribute'
s390/pci: Constify 'struct bin_attribute'
s390/ipl: Constify 'struct bin_attribute'
s390/crypto/cpacf: Constify 'struct bin_attribute'
s390/qdio: Move memory alloc/pointer arithmetic for slib and sl into one place
s390/cio: Use array indices instead of pointer arithmetic
s390/qdio: Rename feature flag aif_osa to aif_qdio
...
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Merge tag 'for-6.14/io_uring-20250119' of git://git.kernel.dk/linux
Pull io_uring updates from Jens Axboe:
"Not a lot in terms of features this time around, mostly just cleanups
and code consolidation:
- Support for PI meta data read/write via io_uring, with NVMe and
SCSI covered
- Cleanup the per-op structure caching, making it consistent across
various command types
- Consolidate the various user mapped features into a concept called
regions, making the various users of that consistent
- Various cleanups and fixes"
* tag 'for-6.14/io_uring-20250119' of git://git.kernel.dk/linux: (56 commits)
io_uring/fdinfo: fix io_uring_show_fdinfo() misuse of ->d_iname
io_uring: reuse io_should_terminate_tw() for cmds
io_uring: Factor out a function to parse restrictions
io_uring/rsrc: require cloned buffers to share accounting contexts
io_uring: simplify the SQPOLL thread check when cancelling requests
io_uring: expose read/write attribute capability
io_uring/rw: don't gate retry on completion context
io_uring/rw: handle -EAGAIN retry at IO completion time
io_uring/rw: use io_rw_recycle() from cleanup path
io_uring/rsrc: simplify the bvec iter count calculation
io_uring: ensure io_queue_deferred() is out-of-line
io_uring/rw: always clear ->bytes_done on io_async_rw setup
io_uring/rw: use NULL for rw->free_iovec assigment
io_uring/rw: don't mask in f_iocb_flags
io_uring/msg_ring: Drop custom destructor
io_uring: Move old async data allocation helper to header
io_uring/rw: Allocate async data through helper
io_uring/net: Allocate msghdr async data through helper
io_uring/uring_cmd: Allocate async data through generic helper
io_uring/poll: Allocate apoll with generic alloc_cache helper
...
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Merge tag 'for-6.14/block-20250118' of git://git.kernel.dk/linux
Pull block updates from Jens Axboe:
- NVMe pull requests via Keith:
- Target support for PCI-Endpoint transport (Damien)
- TCP IO queue spreading fixes (Sagi, Chaitanya)
- Target handling for "limited retry" flags (Guixen)
- Poll type fix (Yongsoo)
- Xarray storage error handling (Keisuke)
- Host memory buffer free size fix on error (Francis)
- MD pull requests via Song:
- Reintroduce md-linear (Yu Kuai)
- md-bitmap refactor and fix (Yu Kuai)
- Replace kmap_atomic with kmap_local_page (David Reaver)
- Quite a few queue freeze and debugfs deadlock fixes
Ming introduced lockdep support for this in the 6.13 kernel, and it
has (unsurprisingly) uncovered quite a few issues
- Use const attributes for IO schedulers
- Remove bio ioprio wrappers
- Fixes for stacked device atomic write support
- Refactor queue affinity helpers, in preparation for better supporting
isolated CPUs
- Cleanups of loop O_DIRECT handling
- Cleanup of BLK_MQ_F_* flags
- Add rotational support for null_blk
- Various fixes and cleanups
* tag 'for-6.14/block-20250118' of git://git.kernel.dk/linux: (106 commits)
block: Don't trim an atomic write
block: Add common atomic writes enable flag
md/md-linear: Fix a NULL vs IS_ERR() bug in linear_add()
block: limit disk max sectors to (LLONG_MAX >> 9)
block: Change blk_stack_atomic_writes_limits() unit_min check
block: Ensure start sector is aligned for stacking atomic writes
blk-mq: Move more error handling into blk_mq_submit_bio()
block: Reorder the request allocation code in blk_mq_submit_bio()
nvme: fix bogus kzalloc() return check in nvme_init_effects_log()
md/md-bitmap: move bitmap_{start, end}write to md upper layer
md/raid5: implement pers->bitmap_sector()
md: add a new callback pers->bitmap_sector()
md/md-bitmap: remove the last parameter for bimtap_ops->endwrite()
md/md-bitmap: factor behind write counters out from bitmap_{start/end}write()
md: Replace deprecated kmap_atomic() with kmap_local_page()
md: reintroduce md-linear
partitions: ldm: remove the initial kernel-doc notation
blk-cgroup: rwstat: fix kernel-doc warnings in header file
blk-cgroup: fix kernel-doc warnings in header file
nbd: fix partial sending
...
- Fix a case where the new scanning code missed removing an unused rsb.
- Fix the error when removing a configfs entry for an invalid node id.
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Merge tag 'dlm-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
Pull dlm updates from David Teigland:
- Fix a case where the new scanning code missed removing an unused rsb
- Fix the error when removing a configfs entry for an invalid node id
* tag 'dlm-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
dlm: return -ENOENT if no comm was found
dlm: fix srcu_read_lock() return type to int
dlm: fix removal of rsb struct that is master and dir record
Lots of scalability work, another big on disk format change. On disk
format version goes from 1.13 to 1.20.
Like 6.11, this is another big and expensive automatic/required on disk
format upgrade. This is planned to be the last big on disk format
upgrade before the experimental label comes off. There will be one more
minor on disk format update for a few things that couldn't make this
release.
Headline improvements:
- Fix mount time regression that some users encountered post the 6.11
disk accounting rewrite.
Accounting keys were encoded little endian (typetag in the low bits) -
which didn't anticipate adding accounting keys for every inode, which
aren't stored in memory and we don't want to scan at mount time.
- fsck time on large filesystems is improved by multiple orders of
magnitude. Previously, 100TB was about the practical max filesystem
size, where users were reporting fsck times of a day+. With the new
changes (which nearly eliminate backpointers fsck overhead), we fsck'd
a filesystem with 10PB of data in 1.5 hours.
The problematic fsck passes were walking every extent and checking for
missing backpointers, and walking every backpointer to check for
dangling backpointers. As we've been adding more and more runtime self
healing there was no reason to keep around the backpointers -> extents
pass; dangling backpointers are just deleted, and we can do that when
using them - thus, backpointers -> extents is now only run in debug
mode.
extents -> backpointers does need to exist, since missing backpointers
would mean we can't find data to move it (for e.g. copygc, device
evacuate, scrub). But the new on disk format version makes possible a
new strategy where we sum up backpointers within a bucket and check it
against the bucket sector counts, and then only scan for missing
backpointers if the counts are off (and then, only for specific
buckets).
Full list of on disk format changes:
- 1.14: backpointer_bucket_gen
Backpointers now have a field for the bucket generation number,
replacing the obsolete bucket_offset field. This is needed for the
new "sum up backpointers within a bucket" code, since backpointers use
the btree write buffer - meaning we will see stale reads, and this
runs online, with the filesystem in full rw mode.
- 1.15: disk_accounting_big_endian
As previously described, fix the endianness of accounting keys so that
accounting keys with the same typetag sort together, and accounting
read can skip types it's not interested in.
- 1.16: reflink_p_may_update_opts:
This version indicates that a new reflink pointer field is understood
and may be used; the field indicates whether the reflink pointer has
permissions to update IO path options (e.g. compression, replicas) may
be updated on the indirect extent it points to.
This completes the rebalance/reflink data path option handling from
the 6.13 pull request.
- 1.17: inode_depth
Add a new inode field, bi_depth, to accelerate the
check_directory_structure fsck path, which checks for loops in the
filesystem heirarchy.
check_inodes and check_dirents check connectivity, so
check_directory_structure only has to check for loops - by walking
back up to the root from every directory.
But a path can't be a loop if it has a counter that increases
monotonically from root to leaf - adding a depth counter means that we
can check for loops with only local (parent -> child) checks. We might
need to occasionally renumber the depth field in fsck if directories
have been moved around, but then future fsck runs will be much faster.
- 1.18: persistent_inode_cursors
Previously, the cursor used for inode allocation was only kept in
memory, which meant that users with large filesystems and lots of
files were reporting that the first create after mounting would take
awhile - since it had to scan from the start.
Inode allocation cursors are now persistent, and also include a
generation field (incremented on wraparound, which will only happen if
inode allocation is restricted to 32 bit inodes), so that we don't
have to leave inode_generation keys around after a delete.
The option for 32 bit inode numbers may now also be set on individual
directories, and non-32 bit inode allocations are disallowed from
allocating from the 32 bit part of the inode number space.
- 1.19: autofix_errors
Runtime self healing is now the default.o
- 1.20: directory size (from Hongbo)
directory i_size is now meaningful, and not 0.
Release notes from the previous 6.13 pull request:
- Self healing work:
Allocator and reflink now run the exact same check/repair code that
fsck does at runtime, where applicable.
The long term goal here is to remove inconsistent() errors (that cause
us to go emergency read only) by lifting fsck code up to normal
runtime paths; we should only go emergency read-only if we detect an
inconsistency that was due to a runtime bug - or truly catastrophic
damage (corrupted btree roots/interior nodes).
- Reflink repair no longer deletes reflink pointers: instead we flip an
error bit and log the error, and they can still be deleted by file
deletion. This means a temporary failure to find an indirect extent
(perhaps repaired later by btree node scan) won't result in
unnecessary data loss
- Improvements to rebalance data path option handling: we can now
correctly apply changed filesystem-level io path options to pending
rebalance work, and soon we'll be able to apply file-level io path
option changes to indirect extents.
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Merge tag 'bcachefs-2025-01-20.2' of git://evilpiepirate.org/bcachefs
Pull bcachefs updates from Kent Overstreet:
"Lots of scalability work, another big on-disk format change. On-disk
format version goes from 1.13 to 1.20.
Like 6.11, this is another big and expensive automatic/required on
disk format upgrade. This is planned to be the last big on disk format
upgrade before the experimental label comes off. There will be one
more minor on disk format update for a few things that couldn't make
this release.
Headline improvements:
- Self healing work:
Allocator and reflink now run the exact same check/repair code that
fsck does at runtime, where applicable.
The long term goal here is to remove inconsistent() errors (that
cause us to go emergency read only) by lifting fsck code up to
normal runtime paths; we should only go emergency read-only if we
detect an inconsistency that was due to a runtime bug - or truly
catastrophic damage (corrupted btree roots/interior nodes).
- Reflink repair no longer deletes reflink pointers:
Instead we flip an error bit and log the error, and they can still
be deleted by file deletion. This means a temporary failure to find
an indirect extent (perhaps repaired later by btree node scan)
won't result in unnecessary data loss
- Improvements to rebalance data path option handling:
We can now correctly apply changed filesystem-level io path options
to pending rebalance work, and soon we'll be able to apply
file-level io path option changes to indirect extents
- Fix mount time regression that some users encountered post the 6.11
disk accounting rewrite.
Accounting keys were encoded little endian (typetag in the low
bits) - which didn't anticipate adding accounting keys for every
inode, which aren't stored in memory and we don't want to scan at
mount time.
- fsck time on large filesystems is improved by multiple orders of
magnitude. Previously, 100TB was about the practical max filesystem
size, where users were reporting fsck times of a day+. With the new
changes (which nearly eliminate backpointers fsck overhead), we
fsck'd a filesystem with 10PB of data in 1.5 hours.
The problematic fsck passes were walking every extent and checking
for missing backpointers, and walking every backpointer to check
for dangling backpointers. As we've been adding more and more
runtime self healing there was no reason to keep around the
backpointers -> extents pass; dangling backpointers are just
deleted, and we can do that when using them - thus, backpointers ->
extents is now only run in debug mode.
extents -> backpointers does need to exist, since missing
backpointers would mean we can't find data to move it (for e.g.
copygc, device evacuate, scrub). But the new on disk format version
makes possible a new strategy where we sum up backpointers within a
bucket and check it against the bucket sector counts, and then only
scan for missing backpointers if the counts are off (and then, only
for specific buckets).
Full list of on disk format changes:
- 1.14: backpointer_bucket_gen
Backpointers now have a field for the bucket generation number,
replacing the obsolete bucket_offset field. This is needed for the
new "sum up backpointers within a bucket" code, since backpointers
use the btree write buffer - meaning we will see stale reads, and
this runs online, with the filesystem in full rw mode.
- 1.15: disk_accounting_big_endian
As previously described, fix the endianness of accounting keys so
that accounting keys with the same typetag sort together, and
accounting read can skip types it's not interested in.
- 1.16: reflink_p_may_update_opts:
This version indicates that a new reflink pointer field is
understood and may be used; the field indicates whether the reflink
pointer has permissions to update IO path options (e.g.
compression, replicas) may be updated on the indirect extent it
points to.
This completes the rebalance/reflink data path option handling from
the 6.13 pull request.
- 1.17: inode_depth
Add a new inode field, bi_depth, to accelerate the
check_directory_structure fsck path, which checks for loops in the
filesystem heirarchy.
check_inodes and check_dirents check connectivity, so
check_directory_structure only has to check for loops - by walking
back up to the root from every directory.
But a path can't be a loop if it has a counter that increases
monotonically from root to leaf - adding a depth counter means that
we can check for loops with only local (parent -> child) checks. We
might need to occasionally renumber the depth field in fsck if
directories have been moved around, but then future fsck runs will
be much faster.
- 1.18: persistent_inode_cursors
Previously, the cursor used for inode allocation was only kept in
memory, which meant that users with large filesystems and lots of
files were reporting that the first create after mounting would
take awhile - since it had to scan from the start.
Inode allocation cursors are now persistent, and also include a
generation field (incremented on wraparound, which will only happen
if inode allocation is restricted to 32 bit inodes), so that we
don't have to leave inode_generation keys around after a delete.
The option for 32 bit inode numbers may now also be set on
individual directories, and non-32 bit inode allocations are
disallowed from allocating from the 32 bit part of the inode number
space.
- 1.19: autofix_errors
Runtime self healing is now the default.o
- 1.20: directory size (from Hongbo)
directory i_size is now meaningful, and not 0"
* tag 'bcachefs-2025-01-20.2' of git://evilpiepirate.org/bcachefs: (268 commits)
bcachefs: Fix check_inode_hash_info_matches_root()
bcachefs: Document issue with bch_stripe layout
bcachefs: Fix self healing on read error
bcachefs: Pop all the transactions from the abort one
bcachefs: Only abort the transactions in the cycle
bcachefs: Introduce lock_graph_pop_from
bcachefs: Convert open-coded lock_graph_pop_all to helper
bcachefs: Do not allow no fail lock request to fail
bcachefs: Merge the condition to avoid additional invocation
Revert "bcachefs: Fix bch2_btree_node_upgrade()"
bcachefs: bcachefs_metadata_version_directory_size
bcachefs: make directory i_size meaningful
bcachefs: check_unreachable_inodes is not actually PASS_ONLINE yet
bcachefs: Don't use BTREE_ITER_cached when walking alloc btree during fsck
bcachefs: Check for dirents to overwritten inodes
bcachefs: bch2_btree_iter_peek_slot() handles navigating to nonexistent depth
bcachefs: Don't set btree_path to updtodate if we don't fill
bcachefs: __bch2_btree_pos_to_text()
bcachefs: printbuf_reset() handles tabstops
bcachefs: Silence read-only errors when deleting snapshots
...
- exec: fix up /proc/pid/comm in the execveat(AT_EMPTY_PATH) case
(Tycho Andersen, Kees Cook)
- binfmt_misc: Fix comment typos (Christophe JAILLET)
- exec: move empty argv[0] warning closer to actual logic (Nir Lichtman)
- exec: remove legacy custom binfmt modules autoloading (Nir Lichtman)
- binfmt_flat: Fix integer overflow bug on 32 bit systems (Dan Carpenter)
- exec: Make sure set_task_comm() always NUL-terminates
- coredump: Do not lock when copying "comm"
- MAINTAINERS: add auxvec.h and set myself as maintainer
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Merge tag 'execve-v6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull execve updates from Kees Cook:
- fix up /proc/pid/comm in the execveat(AT_EMPTY_PATH) case (Tycho
Andersen, Kees Cook)
- binfmt_misc: Fix comment typos (Christophe JAILLET)
- move empty argv[0] warning closer to actual logic (Nir Lichtman)
- remove legacy custom binfmt modules autoloading (Nir Lichtman)
- Make sure set_task_comm() always NUL-terminates
- binfmt_flat: Fix integer overflow bug on 32 bit systems (Dan
Carpenter)
- coredump: Do not lock when copying "comm"
- MAINTAINERS: add auxvec.h and set myself as maintainer
* tag 'execve-v6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
binfmt_flat: Fix integer overflow bug on 32 bit systems
selftests/exec: add a test for execveat()'s comm
exec: fix up /proc/pid/comm in the execveat(AT_EMPTY_PATH) case
exec: Make sure task->comm is always NUL-terminated
exec: remove legacy custom binfmt modules autoloading
exec: move warning of null argv to be next to the relevant code
fs: binfmt: Fix a typo
MAINTAINERS: exec: Mark Kees as maintainer
MAINTAINERS: exec: Add auxvec.h UAPI
coredump: Do not lock during 'comm' reporting
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Merge tag 'for-6.14-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs updates from David Sterba:
"User visible changes, features:
- rebuilding of the free space tree at mount time is done in more
transactions, fix potential hangs when the transaction thread is
blocked due to large amount of block groups
- more read IO balancing strategies (experimental config), add two
new ways how to select a device for read if the profiles allow that
(all RAID1*), the current default selects the device by pid which
is good on average but less performant for single reader workloads
- select preferred device for all reads (namely for testing)
- round-robin, balance reads across devices relevant for the
requested IO range
- add encoded write ioctl support to io_uring (read was added in
6.12), basis for writing send stream using that instead of
syscalls, non-blocking mode is not yet implemented
- support FS_IOC_READ_VERITY_METADATA, applications can use the
metadata to do their own verification
- pass inode's i_write_hint to bios, for parity with other
filesystems, ioctls F_GET_RW_HINT/F_SET_RW_HINT
Core:
- in zoned mode: allow to directly reclaim a block group by simply
resetting it, then it can be reused and another block group does
not need to be allocated
- super block validation now also does more comprehensive sys array
validation, adding it to the points where superblock is validated
(post-read, pre-write)
- subpage mode fixes:
- fix double accounting of blocks due to some races
- improved or fixed error handling in a few cases (compression,
delalloc)
- raid stripe tree:
- fix various cases with extent range splitting or deleting
- implement hole punching to extent range
- reduce number of stripe tree lookups during bio submission
- more self-tests
- updated self-tests (delayed refs)
- error handling improvements
- cleanups, refactoring
- remove rest of backref caching infrastructure from relocation,
not needed anymore
- error message updates
- remove unnecessary calls when extent buffer was marked dirty
- unused parameter removal
- code moved to new files
Other code changes: add rb_find_add_cached() to the rb-tree API"
* tag 'for-6.14-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (127 commits)
btrfs: selftests: add a selftest for deleting two out of three extents
btrfs: selftests: add test for punching a hole into 3 RAID stripe-extents
btrfs: selftests: add selftest for punching holes into the RAID stripe extents
btrfs: selftests: test RAID stripe-tree deletion spanning two items
btrfs: selftests: don't split RAID extents in half
btrfs: selftests: check for correct return value of failed lookup
btrfs: don't use btrfs_set_item_key_safe on RAID stripe-extents
btrfs: implement hole punching for RAID stripe extents
btrfs: fix deletion of a range spanning parts two RAID stripe extents
btrfs: fix tail delete of RAID stripe-extents
btrfs: fix front delete range calculation for RAID stripe extents
btrfs: assert RAID stripe-extent length is always greater than 0
btrfs: don't try to delete RAID stripe-extents if we don't need to
btrfs: selftests: correct RAID stripe-tree feature flag setting
btrfs: add io_uring interface for encoded writes
btrfs: remove the unused locked_folio parameter from btrfs_cleanup_ordered_extents()
btrfs: add extra error messages for delalloc range related errors
btrfs: subpage: dump the involved bitmap when ASSERT() failed
btrfs: subpage: fix the bitmap dump of the locked flags
btrfs: do proper folio cleanup when run_delalloc_nocow() failed
...
- In the quota code, to avoid spurious audit messages, don't call
capable() when quotas are off.
- When changing the 'j' flag of an inode, truncate the inode address
space to avoid mixing "buffer head" and "iomap" pages.
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Merge tag 'gfs2-for-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull gfs2 updates from Andreas Gruenbacher:
- In the quota code, to avoid spurious audit messages, don't call
capable() when quotas are off
- When changing the 'j' flag of an inode, truncate the inode address
space to avoid mixing "buffer head" and "iomap" pages
* tag 'gfs2-for-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag
gfs2: reorder capability check last
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Merge tag 'vfs-6.14-rc1.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull afs updates from Christian Brauner:
"Dynamic root improvements:
- Create an /afs/.<cell> mountpoint to match the /afs/<cell>
mountpoint when a cell is created
- Add some more checks on cell names proposed by the user to prevent
dodgy symlink bodies from being created. Also prevent rootcell from
being altered once set to simplify the locking
- Change the handling of /afs/@cell from being a dentry name
substitution at lookup time to making it a symlink to the current
cell name and also provide a /afs/.@cell symlink to point to the
dotted cell mountpoint
Fixes:
- Fix the abort code check in the fallback handling for the
YFS.RemoveFile2 RPC call
- Use call->op->server() for oridnary filesystem RPC calls that have
an operation descriptor instead of call->server()"
* tag 'vfs-6.14-rc1.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
afs: Fix the fallback handling for the YFS.RemoveFile2 RPC call
afs: Make /afs/@cell and /afs/.@cell symlinks
afs: Add rootcell checks
afs: Make /afs/.<cell> as well as /afs/<cell> mountpoints
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Merge tag 'vfs-6.14-rc1.statx.dio' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs direct-io updates from Christian Brauner:
"File systems that write out of place usually require different
alignment for direct I/O writes than what they can do for reads.
Add a separate dio read align field to statx, as many out of place
write file systems can easily do reads aligned to the device sector
size, but require bigger alignment for writes.
This is usually papered over by falling back to buffered I/O for
smaller writes and doing read-modify-write cycles, but performance for
this sucks, so applications benefit from knowing the actual write
alignment"
* tag 'vfs-6.14-rc1.statx.dio' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
xfs: report larger dio alignment for COW inodes
xfs: report the correct read/write dio alignment for reflinked inodes
xfs: cleanup xfs_vn_getattr
fs: add STATX_DIO_READ_ALIGN
fs: reformat the statx definition
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Merge tag 'vfs-6.14-rc1.libfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs libfs updates from Christian Brauner:
"This improves the stable directory offset behavior in various ways.
Stable offsets are needed so that NFS can reliably read directories on
filesystems such as tmpfs:
- Improve the end-of-directory detection
According to getdents(3), the d_off field in each returned
directory entry points to the next entry in the directory. The
d_off field in the last returned entry in the readdir buffer must
contain a valid offset value, but if it points to an actual
directory entry, then readdir/getdents can loop.
Introduce a specific fixed offset value that is placed in the d_off
field of the last entry in a directory. Some user space
applications assume that the EOD offset value is larger than the
offsets of real directory entries, so the largest valid offset
value is reserved for this purpose. This new value is never
allocated by simple_offset_add().
When ->iterate_dir() returns, getdents{64} inserts the ctx->pos
value into the d_off field of the last valid entry in the readdir
buffer. When it hits EOD, offset_readdir() sets ctx->pos to the EOD
offset value so the last entry is updated to point to the EOD
marker.
When trying to read the entry at the EOD offset, offset_readdir()
terminates immediately.
- Rely on d_children to iterate stable offset directories
Instead of using the mtree to emit entries in the order of their
offset values, use it only to map incoming ctx->pos to a starting
entry. Then use the directory's d_children list, which is already
maintained properly by the dcache, to find the next child to emit.
- Narrow the range of directory offset values returned by
simple_offset_add() to 3 .. (S32_MAX - 1) on all platforms. This
means the allocation behavior is identical on 32-bit systems,
64-bit systems, and 32-bit user space on 64-bit kernels. The new
range still permits over 2 billion concurrent entries per
directory.
- Return ENOSPC when the directory offset range is exhausted. Hitting
this error is almost impossible though.
- Remove the simple_offset_empty() helper"
* tag 'vfs-6.14-rc1.libfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
libfs: Use d_children list to iterate simple_offset directories
libfs: Replace simple_offset end-of-directory detection
Revert "libfs: fix infinite directory reads for offset dir"
Revert "libfs: Add simple_offset_empty()"
libfs: Return ENOSPC when the directory offset range is exhausted
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Merge tag 'vfs-6.14-rc1.mount.v2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs mount updates from Christian Brauner:
- Add a mountinfo program to demonstrate statmount()/listmount()
Add a new "mountinfo" sample userland program that demonstrates how
to use statmount() and listmount() to get at the same info that
/proc/pid/mountinfo provides
- Remove pointless nospec.h include
- Prepend statmount.mnt_opts string with security_sb_mnt_opts()
Currently these mount options aren't accessible via statmount()
- Add new mount namespaces to mount namespace rbtree outside of the
namespace semaphore
- Lockless mount namespace lookup
Currently we take the read lock when looking for a mount namespace to
list mounts in. We can make this lockless. The simple search case can
just use a sequence counter to detect concurrent changes to the
rbtree
For walking the list of mount namespaces sequentially via nsfs we
keep a separate rcu list as rb_prev() and rb_next() aren't usable
safely with rcu. Currently there is no primitive for retrieving the
previous list member. To do this we need a new deletion primitive
that doesn't poison the prev pointer and a corresponding retrieval
helper
Since creating mount namespaces is a relatively rare event compared
with querying mounts in a foreign mount namespace this is worth it.
Once libmount and systemd pick up this mechanism to list mounts in
foreign mount namespaces this will be used very frequently
- Add extended selftests for lockless mount namespace iteration
- Add a sample program to list all mounts on the system, i.e., in
all mount namespaces
- Improve mount namespace iteration performance
Make finding the last or first mount to start iterating the mount
namespace from an O(1) operation and add selftests for iterating the
mount table starting from the first and last mount
- Use an xarray for the old mount id
While the ida does use the xarray internally we can use it explicitly
which allows us to increment the unique mount id under the xa lock.
This allows us to remove the atomic as we're now allocating both ids
in one go
- Use a shared header for vfs sample programs
- Fix build warnings for new sample program to list all mounts
* tag 'vfs-6.14-rc1.mount.v2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
samples/vfs: fix build warnings
samples/vfs: use shared header
samples/vfs/mountinfo: Use __u64 instead of uint64_t
fs: remove useless lockdep assertion
fs: use xarray for old mount id
selftests: add listmount() iteration tests
fs: cache first and last mount
samples: add test-list-all-mounts
selftests: remove unneeded include
selftests: add tests for mntns iteration
seltests: move nsfs into filesystems subfolder
fs: simplify rwlock to spinlock
fs: lockless mntns lookup for nsfs
rculist: add list_bidir_{del,prev}_rcu()
fs: lockless mntns rbtree lookup
fs: add mount namespace to rbtree late
fs: prepend statmount.mnt_opts string with security_sb_mnt_opts()
mount: remove inlude/nospec.h include
samples: add a mountinfo program to demonstrate statmount()/listmount()
Linus Torvalds