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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs directory updates from Christian Brauner:
"Recently 'start_creating', 'start_removing', 'start_renaming' and
related interfaces were added which combine the locking and the
lookup.
At that time many callers were changed to use the new interfaces.
However there are still an assortment of places out side of the core
vfs where the directory is locked explictly, whether with inode_lock()
or lock_rename() or similar. These were missed in the first pass for
an assortment of uninteresting reasons.
This addresses the remaining places where explicit locking is used,
and changes them to use the new interfaces, or otherwise removes the
explicit locking.
The biggest changes are in overlayfs. The other changes are quite
simple, though maybe the cachefiles changes is the least simple of
those"
* tag 'vfs-7.1-rc1.directory' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
VFS: unexport lock_rename(), lock_rename_child(), unlock_rename()
ovl: remove ovl_lock_rename_workdir()
ovl: use is_subdir() for testing if one thing is a subdir of another
ovl: change ovl_create_real() to get a new lock when re-opening created file.
ovl: pass name buffer to ovl_start_creating_temp()
cachefiles: change cachefiles_bury_object to use start_renaming_dentry()
ovl: Simplify ovl_lookup_real_one()
VFS: make lookup_one_qstr_excl() static.
nfsd: switch purge_old() to use start_removing_noperm()
selinux: Use simple_start_creating() / simple_done_creating()
Apparmor: Use simple_start_creating() / simple_done_creating()
libfs: change simple_done_creating() to use end_creating()
VFS: move the start_dirop() kerndoc comment to before start_dirop()
fs/proc: Don't lock root inode when creating "self" and "thread-self"
VFS: note error returns in documentation for various lookup functions
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git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux
Pull Rust updates from Miguel Ojeda:
"Toolchain and infrastructure:
- Bump the minimum Rust version to 1.85.0 (and 'bindgen' to 0.71.1).
As proposed in LPC 2025 and the Maintainers Summit [1], we are
going to follow Debian Stable's Rust versions as our minimum
versions.
Debian Trixie was released on 2025-08-09 with a Rust 1.85.0 and
'bindgen' 0.71.1 toolchain, which is a fair amount of time for e.g.
kernel developers to upgrade.
Other major distributions support a Rust version that is high
enough as well, including:
+ Arch Linux.
+ Fedora Linux.
+ Gentoo Linux.
+ Nix.
+ openSUSE Slowroll and openSUSE Tumbleweed.
+ Ubuntu 25.10 and 26.04 LTS. In addition, 24.04 LTS using
their versioned packages.
The merged patch series comes with the associated cleanups and
simplifications treewide that can be performed thanks to both
bumps, as well as documentation updates.
In addition, start using 'bindgen''s '--with-attribute-custom-enum'
feature to set the 'cfi_encoding' attribute for the 'lru_status'
enum used in Binder.
Link: https://lwn.net/Articles/1050174/ [1]
- Add experimental Kconfig option ('CONFIG_RUST_INLINE_HELPERS') that
inlines C helpers into Rust.
Essentially, it performs a step similar to LTO, but just for the
helpers, i.e. very local and fast.
It relies on 'llvm-link' and its '--internalize' flag, and requires
a compatible LLVM between Clang and 'rustc' (i.e. same major
version, 'CONFIG_RUSTC_CLANG_LLVM_COMPATIBLE'). It is only enabled
for two architectures for now.
The result is a measurable speedup in different workloads that
different users have tested. For instance, for the null block
driver, it amounts to a 2%.
- Support global per-version flags.
While we already have per-version flags in many places, we didn't
have a place to set global ones that depend on the compiler
version, i.e. in 'rust_common_flags', which sometimes is needed to
e.g. tweak the lints set per version.
Use that to allow the 'clippy::precedence' lint for Rust < 1.86.0,
since it had a change in behavior.
- Support overriding the crate name and apply it to Rust Binder,
which wanted the module to be called 'rust_binder'.
- Add the remaining '__rust_helper' annotations (started in the
previous cycle).
'kernel' crate:
- Introduce the 'const_assert!' macro: a more powerful version of
'static_assert!' that can refer to generics inside functions or
implementation bodies, e.g.:
fn f<const N: usize>() {
const_assert!(N > 1);
}
fn g<T>() {
const_assert!(size_of::<T>() > 0, "T cannot be ZST");
}
In addition, reorganize our set of build-time assertion macros
('{build,const,static_assert}!') to live in the 'build_assert'
module.
Finally, improve the docs as well to clarify how these are
different from one another and how to pick the right one to use,
and their equivalence (if any) to the existing C ones for extra
clarity.
- 'sizes' module: add 'SizeConstants' trait.
This gives us typed 'SZ_*' constants (avoiding casts) for use in
device address spaces where the address width depends on the
hardware (e.g. 32-bit MMIO windows, 64-bit GPU framebuffers, etc.),
e.g.:
let gpu_heap = 14 * u64::SZ_1M;
let mmio_window = u32::SZ_16M;
- 'clk' module: implement 'Send' and 'Sync' for 'Clk' and thus
simplify the users in Tyr and PWM.
- 'ptr' module: add 'const_align_up'.
- 'str' module: improve the documentation of the 'c_str!' macro to
explain that one should only use it for non-literal cases (for the
other case we instead use C string literals, e.g. 'c"abc"').
- Disallow the use of 'CStr::{as_ptr,from_ptr}' and clean one such
use in the 'task' module.
- 'sync' module: finish the move of 'ARef' and 'AlwaysRefCounted'
outside of the 'types' module, i.e. update the last remaining
instances and finally remove the re-exports.
- 'error' module: clarify that 'from_err_ptr' can return 'Ok(NULL)',
including runtime-tested examples.
The intention is to hopefully prevent UB that assumes the result of
the function is not 'NULL' if successful. This originated from a
case of UB I noticed in 'regulator' that created a 'NonNull' on it.
Timekeeping:
- Expand the example section in the 'HrTimer' documentation.
- Mark the 'ClockSource' trait as unsafe to ensure valid values for
'ktime_get()'.
- Add 'Delta::from_nanos()'.
'pin-init' crate:
- Replace the 'Zeroable' impls for 'Option<NonZero*>' with impls of
'ZeroableOption' for 'NonZero*'.
- Improve feature gate handling for unstable features.
- Declutter the documentation of implementations of 'Zeroable' for
tuples.
- Replace uses of 'addr_of[_mut]!' with '&raw [mut]'.
rust-analyzer:
- Add type annotations to 'generate_rust_analyzer.py'.
- Add support for scripts written in Rust ('generate_rust_target.rs',
'rustdoc_test_builder.rs', 'rustdoc_test_gen.rs').
- Refactor 'generate_rust_analyzer.py' to explicitly identify host
and target crates, improve readability, and reduce duplication.
And some other fixes, cleanups and improvements"
* tag 'rust-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux: (79 commits)
rust: sizes: add SizeConstants trait for device address space constants
rust: kernel: update `file_with_nul` comment
rust: kbuild: allow `clippy::precedence` for Rust < 1.86.0
rust: kbuild: support global per-version flags
rust: declare cfi_encoding for lru_status
docs: rust: general-information: use real example
docs: rust: general-information: simplify Kconfig example
docs: rust: quick-start: remove GDB/Binutils mention
docs: rust: quick-start: remove Nix "unstable channel" note
docs: rust: quick-start: remove Gentoo "testing" note
docs: rust: quick-start: add Ubuntu 26.04 LTS and remove subsection title
docs: rust: quick-start: update minimum Ubuntu version
docs: rust: quick-start: update Ubuntu versioned packages
docs: rust: quick-start: openSUSE provides `rust-src` package nowadays
rust: kbuild: remove "dummy parameter" workaround for `bindgen` < 0.71.1
rust: kbuild: update `bindgen --rust-target` version and replace comment
rust: rust_is_available: remove warning for `bindgen` < 0.69.5 && libclang >= 19.1
rust: rust_is_available: remove warning for `bindgen` 0.66.[01]
rust: bump `bindgen` minimum supported version to 0.71.1 (Debian Trixie)
rust: block: update `const_refs_to_static` MSRV TODO comment
...
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git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux
Pull RCU updates from Joel Fernandes:
"NOCB CPU management:
- Consolidate rcu_nocb_cpu_offload() and rcu_nocb_cpu_deoffload() to
reduce code duplication
- Extract nocb_bypass_needs_flush() helper to reduce duplication in
NOCB bypass path
rcutorture/torture infrastructure:
- Add NOCB01 config for RCU_LAZY torture testing
- Add NOCB02 config for NOCB poll mode testing
- Add TRIVIAL-PREEMPT config for textbook-style preemptible RCU
torture
- Test call_srcu() with preemption both disabled and enabled
- Remove kvm-check-branches.sh in favor of kvm-series.sh
- Make hangs more visible in torture.sh output
- Add informative message for tests without a recheck file
- Fix numeric test comparison in srcu_lockdep.sh
- Use torture_shutdown_init() in refscale and rcuscale instead of
open-coded shutdown functions
- Fix modulo-zero error in torture_hrtimeout_ns().
SRCU:
- Fix SRCU read flavor macro comments
- Fix s/they disables/they disable/ typo in srcu_read_unlock_fast()
RCU Tasks:
- Document that RCU Tasks Trace grace periods now imply RCU grace
periods
- Remove unnecessary smp_store_release() in cblist_init_generic()"
* tag 'rcu.2026.03.31a' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux:
rcutorture: Test call_srcu() with preemption disabled and not
rcu: Add BOOTPARAM_RCU_STALL_PANIC Kconfig option
torture: Avoid modulo-zero error in torture_hrtimeout_ns()
rcu/nocb: Extract nocb_bypass_needs_flush() to reduce duplication
rcu/nocb: Consolidate rcu_nocb_cpu_offload/deoffload functions
rcu-tasks: Remove unnecessary smp_store_release() in cblist_init_generic()
rcutorture: Add NOCB02 config for nocb poll mode testing
rcutorture: Add NOCB01 config for RCU_LAZY torture testing
rcu-tasks: Document that RCU Tasks Trace grace periods now imply RCU grace periods
srcu: Fix s/they disables/they disable/ typo in srcu_read_unlock_fast()
srcu: Fix SRCU read flavor macro comments
rcuscale: Ditch rcu_scale_shutdown in favor of torture_shutdown_init()
refscale: Ditch ref_scale_shutdown in favor of torture_shutdown_init()
rcutorture: Fix numeric "test" comparison in srcu_lockdep.sh
torture: Print informative message for test without recheck file
torture: Make hangs more visible in torture.sh output
kvm-check-branches.sh: Remove in favor of kvm-series.sh
rcutorture: Add a textbook-style trivial preemptible RCU
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https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Updates for v7.1
There's one new core feature here but mostly this has been a fairly
quiet release, we've got a few new drivers and one core feature that's
likely to be relatively rarely used but the bulk of the work this time
around has been on quality.
- Support for bus keepers, this will be used by the Apple device
support.
- Enhancements to the SDCA support, incuding retaskable jacks.
- Unwinding of the pcm_new()/pcm_free() cleanups from Morimoto-san.
- Test improvements for the Cirrus Logic drivers.
- Large sets of fixes for the NXP, nVidia and Qualcomm drivers.
- Support for AMD RPL DMICs, Cirrus Logic CS42L43 and CS47L47, nVidia
machines with CPCAP and WM8962.
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Add support for the Milos SoC, which uses IPA v5.2.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://patch.msgid.link/20260410-ipa-v5-2-v2-1-778422a05060@fairphone.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This MDIO hardware is based on a Microsemi design supported in Linux by
mdio-mscc-miim.c. However, The register interface is completely different
with pic64hpsc, hence the need for separate documentation.
The hardware supports C22 and C45.
The documentation recommends an input clock of 156.25MHz and a prescaler
of 39, which yields an MDIO clock of 1.95MHz.
The hardware supports an interrupt pin to signal transaction completion
which is not strictly needed as the software can also poll a "TRIGGER"
bit for this.
Signed-off-by: Charles Perry <charles.perry@microchip.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260408131821.1145334-2-charles.perry@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Currently, the binding requires 'spi-cpha' for SJA1105 and 'spi-cpol'
for SJA1110.
However, the SJA1110 supports both SPI modes 0 and 2. Mode 2
(cpha=0, cpol=1) is used by the NXP LX2160 Bluebox 3.
On the SolidRun i.MX8DXL HummingBoard Telematics, mode 0 is stable,
while forcing mode 2 introduces CRC errors especially during bursts.
Drop the requirement on spi-cpol for SJA1110.
Fixes: af2eab1a8243 ("dt-bindings: net: nxp,sja1105: document spi-cpol/cpha")
Signed-off-by: Josua Mayer <josua@solid-run.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260409-imx8dxl-sr-som-v2-1-83ff20629ba0@solid-run.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add the fsession attach type to program_types.rst and drgn.rst.
Acked-by: Leon Hwang <leon.hwang@linux.dev>
Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Link: https://lore.kernel.org/r/20260412060346.142007-3-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Fix typo "excpetion" with "exception".
Signed-off-by: Sukrut Heroorkar <hsukrut3@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260411155120.233357-1-hsukrut3@gmail.com>
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nohz_full was introduced in v3.10 in 2013, which means this
documentation is overdue for 13 years.
Fortunately Paul wrote a part of the needed documentation a while ago,
especially concerning nohz_full in Documentation/timers/no_hz.rst and
also about per-CPU kthreads in
Documentation/admin-guide/kernel-per-CPU-kthreads.rst
Introduce a new page that gives an overview of CPU isolation in general.
Acked-by: Waiman Long <longman@redhat.com>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260402094749.18879-1-frederic@kernel.org>
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https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next
Florian Westphal says:
====================
netfilter: updates for net-next
1-3) IPVS updates from Julian Anastasov to enhance visibility into
IPVS internal state by exposing hash size, load factor etc and
allows userspace to tune the load factor used for resizing hash
tables.
4) reject empty/not nul terminated device names from xt_physdev.
This isn't a bug fix; existing code doesn't require a c-string.
But clean this up anyway because conceptually the interface name
definitely should be a c-string.
5) Switch nfnetlink to skb_mac_header helpers that didn't exist back
when this code was written. This gives us additional debug checks
but is not intended to change functionality.
6) Let the xt ttl/hoplimit match reject unknown operator modes.
This is a cleanup, the evaluation function simply returns false when
the mode is out of range. From Marino Dzalto.
7) xt_socket match should enable defrag after all other checks. This
bug is harmless, historically defrag could not be disabled either
except by rmmod.
8) remove UDP-Lite conntrack support, from Fernando Fernandez Mancera.
9) Avoid a couple -Wflex-array-member-not-at-end warnings in the old
xtables 32bit compat code, from Gustavo A. R. Silva.
10) nftables fwd expression should drop packets when their ttl/hl has
expired. This is a bug fix deferred, its not deemed important
enough for -rc8.
11) Add additional checks before assuming the mac header is an ethernet
header, from Zhengchuan Liang.
* tag 'nf-next-26-04-10' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next:
netfilter: require Ethernet MAC header before using eth_hdr()
netfilter: nft_fwd_netdev: check ttl/hl before forwarding
netfilter: x_tables: Avoid a couple -Wflex-array-member-not-at-end warnings
netfilter: conntrack: remove UDP-Lite conntrack support
netfilter: xt_socket: enable defrag after all other checks
netfilter: xt_HL: add pr_fmt and checkentry validation
netfilter: nfnetlink: prefer skb_mac_header helpers
netfilter: x_physdev: reject empty or not-nul terminated device names
ipvs: add conn_lfactor and svc_lfactor sysctl vars
ipvs: add ip_vs_status info
ipvs: show the current conn_tab size to users
====================
Link: https://patch.msgid.link/20260410112352.23599-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Convert the rockchip,rk3399-gru-sound.txt DT binding to DT Schema
format.
Update rockchip,cpu from a single I2S controller phandle to a
phandle-array. Add an optional second entry for the SPDIF controller,
as seen in rk3399-gru.dtsi, required by boards with DisplayPort audio.
Signed-off-by: Anushka Badhe <anushkabadhe@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260410055532.60868-1-anushkabadhe@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next
Johannes Berg says:
====================
Final updates, notably:
- crypto: move Michael MIC code into wireless (only)
- mac80211:
- multi-link 4-addr support
- NAN data support (but no drivers yet)
- ath10k: DT quirk to make it work on some devices
- ath12k: IPQ5424 support
- rtw89: USB improvements for performance
* tag 'wireless-next-2026-04-10' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (124 commits)
wifi: cfg80211: Explicitly include <linux/export.h> in michael-mic.c
wifi: ath10k: Add device-tree quirk to skip host cap QMI requests
dt-bindings: wireless: ath10k: Add quirk to skip host cap QMI requests
crypto: Remove michael_mic from crypto_shash API
wifi: ipw2x00: Use michael_mic() from cfg80211
wifi: ath12k: Use michael_mic() from cfg80211
wifi: ath11k: Use michael_mic() from cfg80211
wifi: mac80211, cfg80211: Export michael_mic() and move it to cfg80211
wifi: ipw2x00: Rename michael_mic() to libipw_michael_mic()
wifi: libertas_tf: refactor endpoint lookup
wifi: libertas: refactor endpoint lookup
wifi: at76c50x: refactor endpoint lookup
wifi: ath12k: Enable IPQ5424 WiFi device support
wifi: ath12k: Add CE remap hardware parameters for IPQ5424
wifi: ath12k: add ath12k_hw_regs for IPQ5424
wifi: ath12k: add ath12k_hw_version_map entry for IPQ5424
wifi: ath12k: Add ath12k_hw_params for IPQ5424
dt-bindings: net: wireless: add ath12k wifi device IPQ5424
wifi: ath10k: fix station lookup failure during disconnect
wifi: ath12k: Create symlink for each radio in a wiphy
...
====================
Link: https://patch.msgid.link/20260410064703.735099-3-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The J722S CPSW3G is mostly identical to the AM64's, but additionally
supports SGMII. The AM64 compatible ti,am642-cpsw-nuss is used as a
fallback.
Signed-off-by: Nora Schiffer <nora.schiffer@ew.tq-group.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/191e9f7e3a6c14eabe891a98c5fb646766479c0a.1775558273.git.nora.schiffer@ew.tq-group.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add ref-sync-sources phandle-array property to the dpll-pin schema
allowing board designers to declare which input pins can serve as
sync sources in a Reference-Sync pair. A Ref-Sync pair consists of
a clock reference and a low-frequency sync signal where the DPLL locks
to the clock but phase-aligns to the sync reference.
Update both examples in the Microchip ZL3073x binding to demonstrate
the new property with a 1 PPS sync source paired to a clock source.
Reviewed-by: Petr Oros <poros@redhat.com>
Reviewed-by: Prathosh Satish <Prathosh.Satish@microchip.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Link: https://patch.msgid.link/20260408102716.443099-5-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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I stumbled upon "isolcpus=managed_irq" which is the last piece which
can only be handled by isolcpus= and has no runtime knob. I knew roughly
what managed interrupts should do but I lacked some details how it is
used and what the managed_irq sub parameter means in practise.
This documents what we have as of today and how it works. I added some
examples how the parameter affects the configuration. Did I miss
something?
Given that the spreading as computed group_cpus_evenly() does not take
the mask of isolated CPUs into account I'm not sure how relevant the
managed_irq argument is. The virtio_scsi driver has no way to limit the
interrupts and I don't see this for the nvme. Even if the number of
queues can be reduced to two (as in the example) it is still spread
evenly in the system instead and the isolated CPUs are not taken into
account.
To make this worse, you can even argue further whether or not the
application on the isolated CPU wants to receive the interrupt directly
or would prefer not to.
Given all this, I am not sure if it makes sense to add 'io_queue' to the
mix or if it could be incorporated into 'managed_irq'.
One more point: Given that isolcpus= is marked deprecated as of commit
b0d40d2b22fe4 ("sched/isolation: Document isolcpus= boot parameter flags, mark it deprecated")
and the 'managed_irq' is evaluated at device's probe time it would
require additional callbacks to re-evaluate the situation. Probably for
'io_queue', too. Does is make sense or should we simply drop the
"deprecation" notice and allowing using it long term?
Dynamic partitions work with cpusets, there this (managed_irq)
limitation but is it really? And if static partition is the use case why
bother.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Aaron Tomlin <atomlin@atomlin.com>
Acked-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260401110232.ET5RxZfl@linutronix.de>
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Add documentation for the device tree binding of the XDP720 eFuse.
Signed-off-by: Ashish Yadav <ashish.yadav@infineon.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20260410070154.3313-2-Ashish.Yadav@infineon.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Add driver for Microchip MCP998X/33 and MCP998XD/33D
Multichannel Automotive Temperature Monitor Family.
Signed-off-by: Victor Duicu <victor.duicu@microchip.com>
Link: https://lore.kernel.org/r/20260403-add-mcp9982-hwmon-v12-2-b3bfb26ff136@microchip.com
[groeck: Add missing break; to avoid build warning]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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to resolve the conflict with urgent fixes.
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Paul Walmsley:
"Before v7.0 is released, fix a few issues with the CFI patchset,
merged earlier in v7.0-rc, that primarily affect interfaces to
non-kernel code:
- Improve the prctl() interface for per-task indirect branch landing
pad control to expand abbreviations and to resemble the speculation
control prctl() interface
- Expand the "LP" and "SS" abbreviations in the ptrace uapi header
file to "branch landing pad" and "shadow stack", to improve
readability
- Fix a typo in a CFI-related macro name in the ptrace uapi header
file
- Ensure that the indirect branch tracking state and shadow stack
state are unlocked immediately after an exec() on the new task so
that libc subsequently can control it
- While working in this area, clean up the kernel-internal,
cross-architecture prctl() function names by expanding the
abbreviations mentioned above"
* tag 'riscv-for-linus-v7.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
prctl: cfi: change the branch landing pad prctl()s to be more descriptive
riscv: ptrace: cfi: expand "SS" references to "shadow stack" in uapi headers
prctl: rename branch landing pad implementation functions to be more explicit
riscv: ptrace: expand "LP" references to "branch landing pads" in uapi headers
riscv: cfi: clear CFI lock status in start_thread()
riscv: ptrace: cfi: fix "PRACE" typo in uapi header
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Add documentation for the IFLA_BR_STP_MODE bridge attribute in the
"User space STP helper" section of the bridge documentation. Reference
the BR_STP_MODE_* values via kernel-doc and describe the use case for
network namespace environments.
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Andy Roulin <aroulin@nvidia.com>
Link: https://patch.msgid.link/20260405205224.3163000-3-aroulin@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The bridge-stp usermode helper is currently restricted to the initial
network namespace, preventing userspace STP daemons (e.g. mstpd) from
operating on bridges in other network namespaces. Since commit
ff62198553e4 ("bridge: Only call /sbin/bridge-stp for the initial
network namespace"), bridges in non-init namespaces silently fall
back to kernel STP with no way to use userspace STP.
Add a new bridge attribute IFLA_BR_STP_MODE that allows explicit
per-bridge control over STP mode selection:
BR_STP_MODE_AUTO (default) - Existing behavior: invoke the
/sbin/bridge-stp helper in init_net only; fall back to kernel STP
if it fails or in non-init namespaces.
BR_STP_MODE_USER - Directly enable userspace STP (BR_USER_STP)
without invoking the helper. Works in any network namespace.
Userspace is responsible for ensuring an STP daemon manages the
bridge.
BR_STP_MODE_KERNEL - Directly enable kernel STP (BR_KERNEL_STP)
without invoking the helper.
The mode can only be changed while STP is disabled, or set to the
same value (-EBUSY otherwise). IFLA_BR_STP_MODE is processed before
IFLA_BR_STP_STATE in br_changelink(), so both can be set atomically
in a single netlink message. The mode can also be changed in the
same message that disables STP.
The stp_mode struct field is u8 since all possible values fit, while
NLA_U32 is used for the netlink attribute since it occupies the same
space in the netlink message as NLA_U8.
A new stp_helper_active boolean tracks whether the /sbin/bridge-stp
helper was invoked during br_stp_start(), so that br_stp_stop() only
calls the helper for stop when it was called for start. This avoids
calling the helper asymmetrically when stp_mode changes between
start and stop.
Suggested-by: Ido Schimmel <idosch@nvidia.com>
Assisted-by: Claude:claude-opus-4-6
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Andy Roulin <aroulin@nvidia.com>
Link: https://patch.msgid.link/20260405205224.3163000-2-aroulin@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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group->notifier is dead code. VFIO initializes it and checks it for
emptiness on teardown, but nobody ever registers on it or triggers it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Anthony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20260407175934.1602711-1-pbonzini@redhat.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
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Add devicetree schema for Microchip MCP998X/33 and MCP998XD/33D
Multichannel Automotive Temperature Monitor Family.
Signed-off-by: Victor Duicu <victor.duicu@microchip.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260403-add-mcp9982-hwmon-v12-1-b3bfb26ff136@microchip.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Add pmbus support for Sony APS-379 power supplies. There are a few PMBUS
commands that return data that is undocumented/invalid so these need to
be rejected with -ENXIO. The READ_VOUT command returns data in linear11
format instead of linear16 so we need to workaround this.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20260410012414.2818829-3-chris.packham@alliedtelesis.co.nz
[groeck: Dropped empty line from documentation; added module name to Kconfig]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Add the compatible string for the sony,aps-379. This is a simple PMBus
(I2C) device that requires no additional attributes.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260410012414.2818829-2-chris.packham@alliedtelesis.co.nz
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Even kernels after 2.6 have seq-file support.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260410143234.43610-2-wsa+renesas@sang-engineering.com>
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'for-next/ttbr-macros-cleanup', 'for-next/kselftest', 'for-next/feat_lsui', 'for-next/mpam', 'for-next/hotplug-batched-tlbi', 'for-next/bbml2-fixes', 'for-next/sysreg', 'for-next/generic-entry' and 'for-next/acpi', remote-tracking branches 'arm64/for-next/perf' and 'arm64/for-next/read-once' into for-next/core
* arm64/for-next/perf:
: Perf updates
perf/arm-cmn: Fix resource_size_t printk specifier in arm_cmn_init_dtc()
perf/arm-cmn: Fix incorrect error check for devm_ioremap()
perf: add NVIDIA Tegra410 C2C PMU
perf: add NVIDIA Tegra410 CPU Memory Latency PMU
perf/arm_cspmu: nvidia: Add Tegra410 PCIE-TGT PMU
perf/arm_cspmu: nvidia: Add Tegra410 PCIE PMU
perf/arm_cspmu: Add arm_cspmu_acpi_dev_get
perf/arm_cspmu: nvidia: Add Tegra410 UCF PMU
perf/arm_cspmu: nvidia: Rename doc to Tegra241
perf/arm-cmn: Stop claiming entire iomem region
arm64: cpufeature: Use pmuv3_implemented() function
arm64: cpufeature: Make PMUVer and PerfMon unsigned
KVM: arm64: Read PMUVer as unsigned
* arm64/for-next/read-once:
: Fixes for __READ_ONCE() with CONFIG_LTO=y
arm64, compiler-context-analysis: Permit alias analysis through __READ_ONCE() with CONFIG_LTO=y
arm64: Optimize __READ_ONCE() with CONFIG_LTO=y
* for-next/misc:
: Miscellaneous cleanups/fixes
arm64: rsi: use linear-map alias for realm config buffer
arm64: Kconfig: fix duplicate word in CMDLINE help text
arm64: mte: Skip TFSR_EL1 checks and barriers in synchronous tag check mode
arm64/hwcap: Generate the KERNEL_HWCAP_ definitions for the hwcaps
arm64: kexec: Remove duplicate allocation for trans_pgd
arm64: mm: Use generic enum pgtable_level
arm64: scs: Remove redundant save/restore of SCS SP on entry to/from EL0
arm64: remove ARCH_INLINE_*
* for-next/tlbflush:
: Refactor the arm64 TLB invalidation API and implementation
arm64: mm: __ptep_set_access_flags must hint correct TTL
arm64: mm: Provide level hint for flush_tlb_page()
arm64: mm: Wrap flush_tlb_page() around __do_flush_tlb_range()
arm64: mm: More flags for __flush_tlb_range()
arm64: mm: Refactor __flush_tlb_range() to take flags
arm64: mm: Refactor flush_tlb_page() to use __tlbi_level_asid()
arm64: mm: Simplify __flush_tlb_range_limit_excess()
arm64: mm: Simplify __TLBI_RANGE_NUM() macro
arm64: mm: Re-implement the __flush_tlb_range_op macro in C
arm64: mm: Inline __TLBI_VADDR_RANGE() into __tlbi_range()
arm64: mm: Push __TLBI_VADDR() into __tlbi_level()
arm64: mm: Implicitly invalidate user ASID based on TLBI operation
arm64: mm: Introduce a C wrapper for by-range TLB invalidation
arm64: mm: Re-implement the __tlbi_level macro as a C function
* for-next/ttbr-macros-cleanup:
: Cleanups of the TTBR1_* macros
arm64/mm: Directly use TTBRx_EL1_CnP
arm64/mm: Directly use TTBRx_EL1_ASID_MASK
arm64/mm: Describe TTBR1_BADDR_4852_OFFSET
* for-next/kselftest:
: arm64 kselftest updates
selftests/arm64: Implement cmpbr_sigill() to hwcap test
* for-next/feat_lsui:
: Futex support using FEAT_LSUI instructions to avoid toggling PAN
arm64: armv8_deprecated: Disable swp emulation when FEAT_LSUI present
arm64: Kconfig: Add support for LSUI
KVM: arm64: Use CAST instruction for swapping guest descriptor
arm64: futex: Support futex with FEAT_LSUI
arm64: futex: Refactor futex atomic operation
KVM: arm64: kselftest: set_id_regs: Add test for FEAT_LSUI
KVM: arm64: Expose FEAT_LSUI to guests
arm64: cpufeature: Add FEAT_LSUI
* for-next/mpam: (40 commits)
: Expose MPAM to user-space via resctrl:
: - Add architecture context-switch and hiding of the feature from KVM.
: - Add interface to allow MPAM to be exposed to user-space using resctrl.
: - Add errata workaoround for some existing platforms.
: - Add documentation for using MPAM and what shape of platforms can use resctrl
arm64: mpam: Add initial MPAM documentation
arm_mpam: Quirk CMN-650's CSU NRDY behaviour
arm_mpam: Add workaround for T241-MPAM-6
arm_mpam: Add workaround for T241-MPAM-4
arm_mpam: Add workaround for T241-MPAM-1
arm_mpam: Add quirk framework
arm_mpam: resctrl: Call resctrl_init() on platforms that can support resctrl
arm64: mpam: Select ARCH_HAS_CPU_RESCTRL
arm_mpam: resctrl: Add empty definitions for assorted resctrl functions
arm_mpam: resctrl: Update the rmid reallocation limit
arm_mpam: resctrl: Add resctrl_arch_rmid_read()
arm_mpam: resctrl: Allow resctrl to allocate monitors
arm_mpam: resctrl: Add support for csu counters
arm_mpam: resctrl: Add monitor initialisation and domain boilerplate
arm_mpam: resctrl: Add kunit test for control format conversions
arm_mpam: resctrl: Add support for 'MB' resource
arm_mpam: resctrl: Wait for cacheinfo to be ready
arm_mpam: resctrl: Add rmid index helpers
arm_mpam: resctrl: Convert to/from MPAMs fixed-point formats
arm_mpam: resctrl: Hide CDP emulation behind CONFIG_EXPERT
...
* for-next/hotplug-batched-tlbi:
: arm64/mm: Enable batched TLB flush in unmap_hotplug_range()
arm64/mm: Reject memory removal that splits a kernel leaf mapping
arm64/mm: Enable batched TLB flush in unmap_hotplug_range()
* for-next/bbml2-fixes:
: Fixes for realm guest and BBML2_NOABORT
arm64: mm: Remove pmd_sect() and pud_sect()
arm64: mm: Handle invalid large leaf mappings correctly
arm64: mm: Fix rodata=full block mapping support for realm guests
* for-next/sysreg:
: arm64 sysreg updates
arm64/sysreg: Update ID_AA64SMFR0_EL1 description to DDI0601 2025-12
arm64/sysreg: Update ID_AA64ZFR0_EL1 description to DDI0601 2025-12
arm64/sysreg: Update ID_AA64FPFR0_EL1 description to DDI0601 2025-12
arm64/sysreg: Update ID_AA64ISAR2_EL1 description to DDI0601 2025-12
arm64/sysreg: Update ID_AA64ISAR0_EL1 description to DDI0601 2025-12
arm64/sysreg: Update SMIDR_EL1 to DDI0601 2025-06
* for-next/generic-entry:
: More arm64 refactoring towards using the generic entry code
arm64: Check DAIF (and PMR) at task-switch time
arm64: entry: Use split preemption logic
arm64: entry: Use irqentry_{enter_from,exit_to}_kernel_mode()
arm64: entry: Consistently prefix arm64-specific wrappers
arm64: entry: Don't preempt with SError or Debug masked
entry: Split preemption from irqentry_exit_to_kernel_mode()
entry: Split kernel mode logic from irqentry_{enter,exit}()
entry: Move irqentry_enter() prototype later
entry: Remove local_irq_{enable,disable}_exit_to_user()
entry: Fix stale comment for irqentry_enter()
* for-next/acpi:
: arm64 ACPI updates
ACPI: AGDI: fix missing newline in error message
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Update the translation of .../rust/index.rst into Chinese.
Update the translation through commit a592a36e4937
("Documentation: use a source-read extension for the index link boilerplate")
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Ben Guo <ben.guo@openatom.club>
Signed-off-by: Alex Shi <alexs@kernel.org>
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Update the translation of .../rust/quick-start.rst into Chinese.
Update the translation through commit 5935461b4584
("docs: rust: quick-start: add Debian 13 (Trixie)")
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Ben Guo <ben.guo@openatom.club>
Acked-by: Gary Guo <gary@garyguo.net> # Rust
Signed-off-by: Alex Shi <alexs@kernel.org>
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Update the translation of .../rust/coding-guidelines.rst into Chinese.
Update the translation through commit 4a9cb2eecc78
("docs: rust: add section on imports formatting")
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Ben Guo <ben.guo@openatom.club>
Signed-off-by: Alex Shi <alexs@kernel.org>
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Update the translation of .../rust/arch-support.rst into Chinese.
Update the translation through commit ccb8ce526807
("ARM: 9441/1: rust: Enable Rust support for ARMv7")
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Ben Guo <ben.guo@openatom.club>
Signed-off-by: Alex Shi <alexs@kernel.org>
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The Chinese translation of the development process documentation was
outdated. Sync it with the current English version to ensure consistency.
Key changes include:
- Update versioning examples from 5.x to the 9.x placeholder.
- Add footnote [1] to explain the non-semantic versioning scheme.
- Replace the obsolete LTS kernel table with a link to kernel.org.
- Add a cross-reference for the "interleaved replies" section.
Update the translation through commit 5ce70894f6ca
("Doc: correct spelling and wording mistakes")
Signed-off-by: Song Hongyi <szpcq123@gmail.com>
Signed-off-by: Alex Shi <alexs@kernel.org>
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This patch fixes an inconsistent describtion in testing-overview.rst,
which should be ``kmalloc`` instead of ``kmalloc_arry`` according to
the original text.
Signed-off-by: LIU Haoyang <tttturtleruss@gmail.com>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Signed-off-by: Alex Shi <alexs@kernel.org>
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/thermal/linux
Merge updates of assorted thermal drivers for 7.1-rc1 from Daniel
Lezcano:
"- Added an OF node address to output message to make sensor names more
distinguishable (Alexander Stein)
- Added hwmon support for the i.MX97 thermal sensor (Alexander Stein)
- Clamped correctly the results when doing value/temperature conversion
in the Spreadtrum driver (Thorsten Blum)
- Added the SDM670 compatible DT bindings for the Tsens and the lMH
drivers (Richard Acayan)
- Added the SM8750 compatible DT bindings for the Tsens (Manaf
Meethalavalappu Pallikunhi)
- Added the Eliza SoC compatible DT bindings for the Tsens (Krzysztof
Kozlowski)
- Fixed inverted condition check on error in the Spear driver (Gopi
Krishna Menon)
- Converted the DT bindings documentation into DT schema (Gopi Krishna
Menon)
- Used max() macro to increase readibility in the Broadcom STB thermal
sensor (Thorsten Blum)
- Removed stale @trim_offset kernel-doc entry (John Madieu)"
* tag 'thermal-v7.1-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/thermal/linux:
thermal: renesas: rzg3e: Remove stale @trim_offset kernel-doc entry
thermal/drivers/brcmstb_thermal: Use max to simplify brcmstb_get_temp
dt-bindings: thermal: st,thermal-spear1340: convert to dtschema
thermal/drivers/spear: Fix error condition for reading st,thermal-flags
dt-bindings: thermal: qcom-tsens: Add Eliza SoC TSENS
dt-bindings: thermal: qcom-tsens: Document the SM8750 Temperature Sensor
thermal/drivers/sprd: Use min instead of clamp in sprd_thm_temp_to_rawdata
dt-bindings: thermal: lmh: Add SDM670 compatible
dt-bindings: thermal: tsens: add SDM670 compatible
thermal/drivers/sprd: Fix raw temperature clamping in sprd_thm_rawdata_to_temp
thermal/drivers/sprd: Fix temperature clamping in sprd_thm_temp_to_rawdata
thermal/drivers/imx91: Add hwmon support
thermal/of: Add OF node address to output message
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Allow the default load factor for the connection and service tables
to be configured.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Merge cpufreq updates for 7.1-rc1:
- Update qcom-hw DT bindings to include Eliza hardware (Abel Vesa)
- Update cpufreq-dt-platdev blocklist (Faruque Ansari)
- Minor updates to driver and dt-bindings for Tegra (Thierry Reding,
Rosen Penev)
- Add MAINTAINERS entry for CPPC driver (Viresh Kumar)
- Add support for new features: CPPC performance priority, Dynamic EPP,
Raw EPP, and new unit tests for them to amd-pstate (Gautham Shenoy,
Mario Limonciello)
- Fix sysfs files being present when HW missing and broken/outdated
documentation in the amd-pstate driver (Ninad Naik, Gautham Shenoy)
- Pass the policy to cpufreq_driver->adjust_perf() to avoid using
cpufreq_cpu_get() in the .adjust_perf() callback in amd-pstate which
leads to a scheduling-while-atomic bug (K Prateek Nayak)
- Clean up dead code in Kconfig for cpufreq (Julian Braha)
- Remove max_freq_req update for pre-existing cpufreq policy and add a
boost_freq_req QoS request to save the boost constraint instead of
overwriting the last scaling_max_freq constraint (Pierre Gondois)
- Embed cpufreq QoS freq_req objects in cpufreq policy so they all
are allocated in one go along with the policy to simplify lifetime
rules and avoid error handling issues (Viresh Kumar)
- Use DMI max speed when CPPC is unavailable in the acpi-cpufreq
scaling driver (Henry Tseng)
- Switch policy_is_shared() in cpufreq to using cpumask_nth() instead
of cpumask_weight() because the former is more efficient (Yury Norov)
- Use sysfs_emit() in sysfs show functions for cpufreq governor
attributes (Thorsten Blum)
- Update intel_pstate to stop returning an error when "off" is written
to its status sysfs attribute while the driver is already off (Fabio
De Francesco)
- Include current frequency in the debug message printed by
__cpufreq_driver_target() (Pengjie Zhang)
* pm-cpufreq: (38 commits)
cpufreq/amd-pstate: Add POWER_SUPPLY select for dynamic EPP
MAINTAINERS: amd-pstate: Step down as maintainer, add Prateek as reviewer
cpufreq: Pass the policy to cpufreq_driver->adjust_perf()
cpufreq/amd-pstate: Pass the policy to amd_pstate_update()
cpufreq/amd-pstate-ut: Add a unit test for raw EPP
cpufreq/amd-pstate: Add support for raw EPP writes
cpufreq/amd-pstate: Add support for platform profile class
cpufreq/amd-pstate: add kernel command line to override dynamic epp
cpufreq/amd-pstate: Add dynamic energy performance preference
Documentation: amd-pstate: fix dead links in the reference section
cpufreq/amd-pstate: Cache the max frequency in cpudata
Documentation/amd-pstate: Add documentation for amd_pstate_floor_{freq,count}
Documentation/amd-pstate: List amd_pstate_prefcore_ranking sysfs file
Documentation/amd-pstate: List amd_pstate_hw_prefcore sysfs file
amd-pstate-ut: Add a testcase to validate the visibility of driver attributes
amd-pstate-ut: Add module parameter to select testcases
amd-pstate: Introduce a tracepoint trace_amd_pstate_cppc_req2()
amd-pstate: Add sysfs support for floor_freq and floor_count
amd-pstate: Add support for CPPC_REQ2 and FLOOR_PERF
x86/cpufeatures: Add AMD CPPC Performance Priority feature.
...
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* Add ops.quiescent() and ops.runnable() to the sched_change path.
When a queued task has one of its scheduling properties changed
(e.g. nice, affinity), it goes through dequeue() -> quiescent() ->
(property change callback, e.g. ops.set_weight()) -> runnable() ->
enqueue().
* Change && to || in ops.enqueue() condition. We want to enqueue tasks
that have a non-zero slice and are not in any DSQ.
* Call ops.dispatch() and ops.dequeue() only for tasks that have had
ops.enqueue() called. This is to account for tasks direct-dispatched
from ops.select_cpu().
* Add a note explaining that the pseudo-code provides a simplified view
of the task lifecycle and list some examples of cases that the
pseudo-code does not account for.
Fixes: a4f61f0a1afd ("sched_ext: Documentation: Add ops.dequeue() to task lifecycle")
Signed-off-by: Kuba Piecuch <jpiecuch@google.com>
Reviewed-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Document support for spread spectrum clocking (SSC) on RTL8211F(D)(I)-CG,
RTL8211FS(I)(-VS)-CG, RTL8211FG(I)(-VS)-CG PHYs. Introduce DT properties
'realtek,clkout-ssc-enable', 'realtek,rxc-ssc-enable' and
'realtek,sysclk-ssc-enable' which control CLKOUT, RXC and SYSCLK
SSC spread spectrum clocking enablement on these signals. These
clock are not exposed via the clock API, therefore assigned-clock-sscs
property does not apply.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Marek Vasut <marek.vasut@mailbox.org>
Link: https://patch.msgid.link/20260405233008.148974-2-marek.vasut@mailbox.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Sort the documented properties alphabetically, no functional change.
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Marek Vasut <marek.vasut@mailbox.org>
Link: https://patch.msgid.link/20260405233008.148974-1-marek.vasut@mailbox.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Daniel Borkmann says:
====================
netkit: Support for io_uring zero-copy and AF_XDP
Containers use virtual netdevs to route traffic from a physical netdev
in the host namespace. They do not have access to the physical netdev
in the host and thus can't use memory providers or AF_XDP that require
reconfiguring/restarting queues in the physical netdev.
This patchset adds the concept of queue leasing to virtual netdevs that
allow containers to use memory providers and AF_XDP at native speed.
Leased queues are bound to a real queue in a physical netdev and act
as a proxy.
Memory providers and AF_XDP operations take an ifindex and queue id,
so containers would pass in an ifindex for a virtual netdev and a queue
id of a leased queue, which then gets proxied to the underlying real
queue.
We have implemented support for this concept in netkit and tested the
latter against Nvidia ConnectX-6 (mlx5) as well as Broadcom BCM957504
(bnxt_en) 100G NICs. For more details see the individual patches.
====================
Link: https://patch.msgid.link/20260402231031.447597-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add a single device mode for netkit instead of netkit pairs. The primary
target for the paired devices is to connect network namespaces, of course,
and support has been implemented in projects like Cilium [0]. For the rxq
leasing the plan is to support two main scenarios related to single device
mode:
* For the use-case of io_uring zero-copy, the control plane can either
set up a netkit pair where the peer device can perform rxq leasing which
is then tied to the lifetime of the peer device, or the control plane
can use a regular netkit pair to connect the hostns to a Pod/container
and dynamically add/remove rxq leasing through a single device without
having to interrupt the device pair. In the case of io_uring, the memory
pool is used as skb non-linear pages, and thus the skb will go its way
through the regular stack into netkit. Things like the netkit policy when
no BPF is attached or skb scrubbing etc apply as-is in case the paired
devices are used, or if the backend memory is tied to the single device
and traffic goes through a paired device.
* For the use-case of AF_XDP, the control plane needs to use netkit in the
single device mode. The single device mode currently enforces only a
pass policy when no BPF is attached, and does not yet support BPF link
attachments for AF_XDP. skbs sent to that device get dropped at the
moment. Given AF_XDP operates at a lower layer of the stack tying this
to the netkit pair did not make sense. In future, the plan is to allow
BPF at the XDP layer which can: i) process traffic coming from the AF_XDP
application (e.g. QEMU with AF_XDP backend) to filter egress traffic or
to push selected egress traffic up to the single netkit device to the
local stack (e.g. DHCP requests), and ii) vice-versa skbs sent to the
single netkit into the AF_XDP application (e.g. DHCP replies). Also,
the control-plane can dynamically manage rxq leasing for the single
netkit device without having to interrupt (e.g. down/up cycle) the main
netkit pair for the Pod which has traffic going in and out.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Co-developed-by: David Wei <dw@davidwei.uk>
Signed-off-by: David Wei <dw@davidwei.uk>
Reviewed-by: Jordan Rife <jordan@jrife.io>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://docs.cilium.io/en/stable/operations/performance/tuning/#netkit-device-mode [0]
Link: https://patch.msgid.link/20260402231031.447597-11-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Implement netdev_nl_queue_create_doit which creates a new rx queue in a
virtual netdev and then leases it to a rx queue in a physical netdev.
Example with ynl client:
# ynl --family netdev --output-json --do queue-create \
--json '{"ifindex": 8, "type": "rx", "lease": {"ifindex": 4, "queue": {"type": "rx", "id": 15}}}'
{'id': 1}
Note that the netdevice locking order is always from the virtual to
the physical device.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Co-developed-by: David Wei <dw@davidwei.uk>
Signed-off-by: David Wei <dw@davidwei.uk>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260402231031.447597-3-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add a ynl netdev family operation called queue-create that creates a
new queue on a netdevice:
name: queue-create
attribute-set: queue
flags: [admin-perm]
do:
request:
attributes:
- ifindex
- type
- lease
reply: &queue-create-op
attributes:
- id
This is a generic operation such that it can be extended for various
use cases in future. Right now it is mandatory to specify ifindex,
the queue type which is enforced to rx and a lease. The newly created
queue id is returned to the caller.
A queue from a virtual device can have a lease which refers to another
queue from a physical device. This is useful for memory providers
and AF_XDP operations which take an ifindex and queue id to allow
applications to bind against virtual devices in containers. The lease
couples both queues together and allows to proxy the operations from
a virtual device in a container to the physical device.
In future, the nested lease attribute can be lifted and made optional
for other use-cases such as dynamic queue creation for physical
netdevs. The lack of lease and the specification of the physical
device as an ifindex will imply that we need a real queue to be
allocated. Similarly, the queue type enforcement to rx can then be
lifted as well to support tx.
An early implementation had only driver-specific integration [0], but
in order for other virtual devices to reuse, it makes sense to have
this as a generic API in core net.
For leasing queues, the virtual netdev must have real_num_rx_queues
less than num_rx_queues at the time of calling queue-create. The
queue-type must be rx as only rx queues are supported for leasing
for now. We also enforce that the queue-create ifindex must point
to a virtual device, and that the nested lease attribute's ifindex
must point to a physical device. The nested lease attribute set
contains a netns-id attribute which is optional and can specify a
netns-id relative to the caller's netns. It requires cap_net_admin
and if the netns-id attribute is not specified, the lease ifindex
will be retrieved from the current netns. Also, it is modeled as
an s32 type similarly as done elsewhere in the stack.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Co-developed-by: David Wei <dw@davidwei.uk>
Signed-off-by: David Wei <dw@davidwei.uk>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://bpfconf.ebpf.io/bpfconf2025/bpfconf2025_material/lsfmmbpf_2025_netkit_borkmann.pdf [0]
Link: https://patch.msgid.link/20260402231031.447597-2-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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- Use "physical pages" instead of "page frame numbers (PFNs)" for
clarity
- Remove "without any per-I/O overhead" claim from zero-copy
description
- Add scatter/gather limitation: each I/O's data must be contiguous
within a single registered buffer
Suggested-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Link: https://patch.msgid.link/20260409133020.3780098-7-tom.leiming@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Cross-merge networking fixes after downstream PR (net-7.0-rc8).
Conflicts:
net/ipv6/seg6_iptunnel.c
c3812651b522f ("seg6: separate dst_cache for input and output paths in seg6 lwtunnel")
78723a62b969a ("seg6: add per-route tunnel source address")
https://lore.kernel.org/adZhwtOYfo-0ImSa@sirena.org.uk
net/ipv4/icmp.c
fde29fd934932 ("ipv4: icmp: fix null-ptr-deref in icmp_build_probe()")
d98adfbdd5c01 ("ipv4: drop ipv6_stub usage and use direct function calls")
https://lore.kernel.org/adO3dccqnr6j-BL9@sirena.org.uk
Adjacent changes:
drivers/net/ethernet/stmicro/stmmac/chain_mode.c
51f4e090b9f8 ("net: stmmac: fix integer underflow in chain mode")
6b4286e05508 ("net: stmmac: rename STMMAC_GET_ENTRY() -> STMMAC_NEXT_ENTRY()")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge ACPI processor driver updates and ACPI CPPC library updates for
7.1-rc1:
- Address multiple assorted issues and clean up the code in the ACPI
processor idle driver (Huisong Li)
- Replace strlcat() in the ACPI processor idle drive with a better
alternative (Andy Shevchenko)
- Rearrange and clean up acpi_processor_errata_piix4() (Rafael Wysocki)
- Move reference performance to capabilities and fix an uninitialized
variable in the ACPI CPPC library (Pengjie Zhang)
- Add support for the Performance Limited Register to the ACPI CPPC
library (Sumit Gupta)
- Add cppc_get_perf() API to read performance controls, extend
cppc_set_epp_perf() for FFH/SystemMemory, and make the ACPI CPPC
library warn on missing mandatory DESIRED_PERF register (Sumit Gupta)
- Modify the cpufreq CPPC driver to update MIN_PERF/MAX_PERF in target
callbacks to allow it to control performance bounds via standard
scaling_min_freq and scaling_max_freq sysfs attributes and add sysfs
documentation for the Performance Limited Register to it (Sumit Gupta)
* acpi-processor:
ACPI: processor: idle: Reset cpuidle on C-state list changes
cpuidle: Extract and export no-lock variants of cpuidle_unregister_device()
ACPI: processor: idle: Fix NULL pointer dereference in hotplug path
ACPI: processor: idle: Reset power_setup_done flag on initialization failure
ACPI: processor: Rearrange and clean up acpi_processor_errata_piix4()
ACPI: processor: idle: Replace strlcat() with better alternative
ACPI: processor: idle: Remove redundant static variable and rename cstate check function
ACPI: processor: idle: Move max_cstate update out of the loop
ACPI: processor: idle: Remove redundant cstate check in acpi_processor_power_init
ACPI: processor: idle: Add missing bounds check in flatten_lpi_states()
* acpi-cppc:
ACPI: CPPC: Check cpc_read() return values consistently
ACPI: CPPC: Fix uninitialized ref variable in cppc_get_perf_caps()
ACPI: CPPC: Move reference performance to capabilities
cpufreq: CPPC: Add sysfs documentation for perf_limited
ACPI: CPPC: add APIs and sysfs interface for perf_limited
cpufreq: cppc: Update MIN_PERF/MAX_PERF in target callbacks
cpufreq: CPPC: Update cached perf_ctrls on sysfs write
ACPI: CPPC: Extend cppc_set_epp_perf() for FFH/SystemMemory
ACPI: CPPC: Warn on missing mandatory DESIRED_PERF register
ACPI: CPPC: Add cppc_get_perf() API to read performance controls
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Johan Hovold <johan@kernel.org> says:
These drivers reuse the OF node of their parent multi-function device
but fail to take another reference to balance the one dropped by the
platform bus code when unbinding the MFD and deregistering the child
devices.
Fix this by using the intended helper for reusing OF nodes.
Note that the first two patches will cause a trivial conflict with Doug's
series adding accessor functions for struct device flags which has now been
merged to the driver-core tree:
https://lore.kernel.org/r/20260406232444.3117516-1-dianders@chromium.org
Link: https://patch.msgid.link/20260408073055.5183-1-johan@kernel.org
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Merge ACPICA updates, an ACPI OS service layer (OSL) update and
assorted updates related to parsing ACPI tables for 7.1-rc1:
- Update maintainers information regarding ACPICA (Rafael Wysocki)
- Replace strncpy() with strscpy_pad() in acpi_ut_safe_strncpy() (Kees
Cook)
- Trigger an ordered system power off after encountering a fatal error
operator in AML (Armin Wolf)
- Enable ACPI FPDT parsing on LoongArch (Xi Ruoyao)
- Remove the temporary stop-gap acpi_pptt_cache_v1_full structure from
the ACPI PPTT parser (Ben Horgan)
- Add support for exposing ACPI FPDT subtables FBPT and S3PT (Nate
DeSimone)
* acpica:
ACPICA: Update maintainers information
ACPICA: Replace strncpy() with strscpy_pad() in acpi_ut_safe_strncpy()
* acpi-osl:
ACPI: OSL: Poweroff when encountering a fatal ACPI error
* acpi-tables:
ACPI: tables: Enable FPDT on LoongArch
Documentation: ABI: add FBPT and S3PT entries to sysfs-firmware-acpi
ACPI: FPDT: expose FBPT and S3PT subtables via sysfs
ACPI: PPTT: Remove duplicate structure, acpi_pptt_cache_v1_full
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Charles Keepax <ckeepax@opensource.cirrus.com> says:
Another round of SDCA fixes a couple of fix to the IRQ cleanup
from Richard, and a minor tweak to the IRQ handling from me.
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