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Author SHA1 Message Date
Miguel Ojeda
211dcf7785 rust: clean Rust 1.88.0's clippy::uninlined_format_args lint 
Starting with Rust 1.88.0 (expected 2025-06-26) [1], `rustc` may move
back the `uninlined_format_args` to `style` from `pedantic` (it was
there waiting for rust-analyzer suppotr), and thus we will start to see
lints like:

    warning: variables can be used directly in the `format!` string
       --> rust/macros/kunit.rs:105:37
        |
    105 |         let kunit_wrapper_fn_name = format!("kunit_rust_wrapper_{}", test);
        |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args
    help: change this to
        |
    105 -         let kunit_wrapper_fn_name = format!("kunit_rust_wrapper_{}", test);
    105 +         let kunit_wrapper_fn_name = format!("kunit_rust_wrapper_{test}");

There is even a case that is a pure removal:

    warning: variables can be used directly in the `format!` string
      --> rust/macros/module.rs:51:13
       |
    51 |             format!("{field}={content}\0", field = field, content = content)
       |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args
    help: change this to
       |
    51 -             format!("{field}={content}\0", field = field, content = content)
    51 +             format!("{field}={content}\0")

The lints all seem like nice cleanups, thus just apply them.

We may want to disable `allow-mixed-uninlined-format-args` in the future.

Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs).
Link: https://github.com/rust-lang/rust-clippy/pull/14160 [1]
Acked-by: Benno Lossin <lossin@kernel.org>
Reviewed-by: Tamir Duberstein <tamird@gmail.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20250502140237.1659624-6-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-05-07 00:11:47 +02:00
Miguel Ojeda
7129ea6e24 rust: clean Rust 1.88.0's unnecessary_transmutes lint 
Starting with Rust 1.88.0 (expected 2025-06-26) [1][2], `rustc` may
introduce a new lint that catches unnecessary transmutes, e.g.:

     error: unnecessary transmute
         --> rust/uapi/uapi_generated.rs:23242:18
          |
    23242 |         unsafe { ::core::mem::transmute(self._bitfield_1.get(0usize, 1u8) as u8) }
          |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace this with: `(self._bitfield_1.get(0usize, 1u8) as u8 == 1)`
          |
          = note: `-D unnecessary-transmutes` implied by `-D warnings`
          = help: to override `-D warnings` add `#[allow(unnecessary_transmutes)]`

There are a lot of them (at least 300), but luckily they are all in
`bindgen`-generated code.

Thus clean all up by allowing it there.

Since unknown lints trigger a lint itself in older compilers, do it
conditionally so that we can keep the `unknown_lints` lint enabled.

Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs).
Link: https://github.com/rust-lang/rust/pull/136083 [1]
Link: https://github.com/rust-lang/rust/issues/136067 [2]
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20250502140237.1659624-4-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-05-07 00:11:47 +02:00
Miguel Ojeda
a39f308709 rust: allow Rust 1.87.0's clippy::ptr_eq lint 
Starting with Rust 1.87.0 (expected 2025-05-15) [1], Clippy may expand
the `ptr_eq` lint, e.g.:

    error: use `core::ptr::eq` when comparing raw pointers
       --> rust/kernel/list.rs:438:12
        |
    438 |         if self.first == item {
        |            ^^^^^^^^^^^^^^^^^^ help: try: `core::ptr::eq(self.first, item)`
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_eq
        = note: `-D clippy::ptr-eq` implied by `-D warnings`
        = help: to override `-D warnings` add `#[allow(clippy::ptr_eq)]`

It is expected that a PR to relax the lint will be backported [2] by
the time Rust 1.87.0 releases, since the lint was considered too eager
(at least by default) [3].

Thus allow the lint temporarily just in case.

Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs).
Link: https://github.com/rust-lang/rust-clippy/pull/14339 [1]
Link: https://github.com/rust-lang/rust-clippy/pull/14526 [2]
Link: https://github.com/rust-lang/rust-clippy/issues/14525 [3]
Link: https://lore.kernel.org/r/20250502140237.1659624-3-ojeda@kernel.org
[ Converted to `allow`s since backport was confirmed. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-05-07 00:11:02 +02:00
Linus Torvalds
3ae7f5093e Driver core fixes for 6.15-rc4 
Here are some small driver core fixes to resolve a number of reported
 problems.  Included in here are:
   - driver core sync fix revert to resolve a much reported problem,
     hopefully this is finally resolved
   - MAINTAINERS file update, documenting that the driver-core tree is
     now under a "shared" maintainership model, thanks to Rafael and
     Danilo for offering to do this!
   - auxbus documentation and MAINTAINERS file update
   - MAINTAINERS file update for Rust PCI code
   - firmware rust binding fixup
   - software node link fix
 
 All of these have been in linux-next for over a week with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

Pull driver core fixes from Greg KH:
 "Here are some small driver core fixes to resolve a number of reported
  problems. Included in here are:

   - driver core sync fix revert to resolve a much reported problem,
     hopefully this is finally resolved

   - MAINTAINERS file update, documenting that the driver-core tree is
     now under a "shared" maintainership model, thanks to Rafael and
     Danilo for offering to do this!

   - auxbus documentation and MAINTAINERS file update

   - MAINTAINERS file update for Rust PCI code

   - firmware rust binding fixup

   - software node link fix

  All of these have been in linux-next for over a week with no reported
  issues"

* tag 'driver-core-6.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core:
  drivers/base/memory: Avoid overhead from for_each_present_section_nr()
  software node: Prevent link creation failure from causing kobj reference count imbalance
  device property: Add a note to the fwnode.h
  drivers/base: Add myself as auxiliary bus reviewer
  drivers/base: Extend documentation with preferred way to use auxbus
  driver core: fix potential NULL pointer dereference in dev_uevent()
  driver core: introduce device_set_driver() helper
  Revert "drivers: core: synchronize really_probe() and dev_uevent()"
  MAINTAINERS: update the location of the driver-core git tree
  rust: firmware: Use `ffi::c_char` type in `FwFunc`
  MAINTAINERS: pci: add entry for Rust PCI code
 2025-04-25 10:02:59 -07:00
FUJITA Tomonori
c1b4071ec3 rust: helpers: Add dma_alloc_attrs() and dma_free_attrs() 
Add dma_alloc_attrs() and dma_free_attrs() helpers to fix a build
error when CONFIG_HAS_DMA is not enabled.

Note that when CONFIG_HAS_DMA is enabled, dma_alloc_attrs() and
dma_free_attrs() are included in both bindings_generated.rs and
bindings_helpers_generated.rs. The former takes precedence so behavior
remains unchanged in that case.

This fixes the following build error on UML:

error[E0425]: cannot find function `dma_alloc_attrs` in crate `bindings`
     --> rust/kernel/dma.rs:171:23
      |
171   |               bindings::dma_alloc_attrs(
      |                         ^^^^^^^^^^^^^^^ help: a function with a similar name exists: `dma_alloc_pages`
      |
     ::: rust/bindings/bindings_generated.rs:44568:5
      |
44568 | /     pub fn dma_alloc_pages(
44569 | |         dev: *mut device,
44570 | |         size: usize,
44571 | |         dma_handle: *mut dma_addr_t,
44572 | |         dir: dma_data_direction,
44573 | |         gfp: gfp_t,
44574 | |     ) -> *mut page;
      | |___________________- similarly named function `dma_alloc_pages` defined here

error[E0425]: cannot find function `dma_free_attrs` in crate `bindings`
     --> rust/kernel/dma.rs:293:23
      |
293   |               bindings::dma_free_attrs(
      |                         ^^^^^^^^^^^^^^ help: a function with a similar name exists: `dma_free_pages`
      |
     ::: rust/bindings/bindings_generated.rs:44577:5
      |
44577 | /     pub fn dma_free_pages(
44578 | |         dev: *mut device,
44579 | |         size: usize,
44580 | |         page: *mut page,
44581 | |         dma_handle: dma_addr_t,
44582 | |         dir: dma_data_direction,
44583 | |     );
      | |______- similarly named function `dma_free_pages` defined here

Fixes: ad2907b4e308 ("rust: add dma coherent allocator abstraction")
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20250412000507.157000-1-fujita.tomonori@gmail.com
[ Reworded for relative paths. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-04-15 23:06:03 +02:00
FUJITA Tomonori
584e61452f rust: helpers: Remove volatile qualifier from io helpers 
Remove the `volatile` qualifier used with __iomem in helper functions
in io.c. These helper functions are just wrappers around the
corresponding accessors so they are unnecessary.

This fixes the following UML build error with CONFIG_RUST enabled:

In file included from rust/helpers/helpers.c:19:
rust/helpers/io.c:12:10: error: passing 'volatile void *' to parameter of type 'void *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
   12 |         iounmap(addr);
      |                 ^~~~
arch/um/include/asm/io.h:19:42: note: passing argument to parameter 'addr' here
   19 | static inline void iounmap(void __iomem *addr)
      |                                          ^
1 error generated.

[ Arnd explains [1] that removing the qualifier is the way forward
  (thanks!):

    Rihgt, I tried this last week when it came up first, removing the
    'volatile' annotations in the asm-generic/io.h header and then
    all the ones that caused build regressions on arm/arm64/x86
    randconfig and allmodconfig builds.  This patch is a little
    longer than my original version as I did run into a few
    regressions later.

    As far as I can tell, none of these volatile annotations have
    any actual effect, and most of them date back to ancient kernels
    where this may have been required.

    Leaving it out of the rust interface is clearly the right way,
    and it shouldn't be too hard to upstream the changes below
    when we need to, but I also don't see any priority to send these.
    If anyone wants to help out, I can send them the whole patch.

  I created an issue [2] in case someone wants to help. - Miguel ]

Fixes: ce30d94e6855 ("rust: add `io::{Io, IoRaw}` base types")
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Cc: stable@vger.kernel.org
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/rust-for-linux/0c844b70-19c7-4b14-ba29-fc99ae0d69f0@app.fastmail.com/ [1]
Link: https://github.com/Rust-for-Linux/linux/issues/1156 [2]
Link: https://lore.kernel.org/r/20250412005341.157150-1-fujita.tomonori@gmail.com
[ Reworded for relative paths. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-04-15 23:03:00 +02:00
Christian Schrefl
53bd978016 rust: firmware: Use ffi::c_char type in FwFunc 
The `FwFunc` struct contains an function with a char pointer argument,
for which a `*const u8` pointer was used. This is not really the
"proper" type for this, so use a `*const kernel::ffi::c_char` pointer
instead.

This has no real functionality changes, since now `kernel::ffi::c_char`
(which bindgen uses for `char`) is now a type alias to `u8` anyways,
but before commit 1bae8729e50a ("rust: map `long` to `isize` and `char`
to `u8`") the concrete type of `kernel::ffi::c_char` depended on the
architecture (However all supported architectures at the time mapped to
`i8`).

This caused problems on the v6.13 tag when building for 32 bit arm (with
my patches), since back then `*const i8` was used in the function
argument and the function that bindgen generated used
`*const core::ffi::c_char` which Rust mapped to `*const u8` on 32 bit
arm. The stable v6.13.y branch does not have this issue since commit
1bae8729e50a ("rust: map `long` to `isize` and `char` to `u8`") was
backported.

This caused the following build error:
```
error[E0308]: mismatched types
  --> rust/kernel/firmware.rs:20:4
   |
20 |         Self(bindings::request_firmware)
   |         ---- ^^^^^^^^^^^^^^^^^^^^^^^^^^ expected fn pointer, found fn item
   |         |
   |         arguments to this function are incorrect
   |
   = note: expected fn pointer `unsafe extern "C" fn(_, *const i8, _) -> _`
                 found fn item `unsafe extern "C" fn(_, *const u8, _) -> _ {request_firmware}`
note: tuple struct defined here
  --> rust/kernel/firmware.rs:14:8
   |
14 | struct FwFunc(
   |        ^^^^^^

error[E0308]: mismatched types
  --> rust/kernel/firmware.rs:24:14
   |
24 |         Self(bindings::firmware_request_nowarn)
   |         ---- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected fn pointer, found fn item
   |         |
   |         arguments to this function are incorrect
   |
   = note: expected fn pointer `unsafe extern "C" fn(_, *const i8, _) -> _`
                 found fn item `unsafe extern "C" fn(_, *const u8, _) -> _ {firmware_request_nowarn}`
note: tuple struct defined here
  --> rust/kernel/firmware.rs:14:8
   |
14 | struct FwFunc(
   |        ^^^^^^

error[E0308]: mismatched types
  --> rust/kernel/firmware.rs:64:45
   |
64 |         let ret = unsafe { func.0(pfw as _, name.as_char_ptr(), dev.as_raw()) };
   |                            ------           ^^^^^^^^^^^^^^^^^^ expected `*const i8`, found `*const u8`
   |                            |
   |                            arguments to this function are incorrect
   |
   = note: expected raw pointer `*const i8`
              found raw pointer `*const u8`

error: aborting due to 3 previous errors
```

Fixes: de6582833db0 ("rust: add firmware abstractions")
Cc: stable@vger.kernel.org
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Signed-off-by: Christian Schrefl <chrisi.schrefl@gmail.com>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Link: https://lore.kernel.org/r/20250413-rust_arm_fix_fw_abstaction-v3-1-8dd7c0bbcd47@gmail.com
[ Add firmware prefix to commit subject. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
 2025-04-14 14:13:23 +02:00
Sami Tolvanen
c59026c057 rust: kbuild: Don't export __pfx symbols 
With CONFIG_PREFIX_SYMBOLS, objtool adds __pfx prefix symbols
to claim the compiler emitted call padding bytes. When
CONFIG_X86_KERNEL_IBT is not selected, the symbols are added to
individual object files and for Rust objects, they end up being
exported, resulting in warnings with CONFIG_GENDWARFKSYMS as the
symbols have no debugging information:

warning: gendwarfksyms: symbol_print_versions: no information for symbol __pfx_rust_helper_put_task_struct
warning: gendwarfksyms: symbol_print_versions: no information for symbol __pfx_rust_helper_task_euid
warning: gendwarfksyms: symbol_print_versions: no information for symbol __pfx_rust_helper_readq_relaxed
...

Filter out the __pfx prefix from exported symbols similarly to
the existing __cfi and __odr_asan prefixes.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Cc: stable@vger.kernel.org
Fixes: ac61506bf2d1 ("rust: Use gendwarfksyms + extended modversions for CONFIG_MODVERSIONS")
Link: https://lore.kernel.org/r/20250318231815.917621-2-samitolvanen@google.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-04-08 21:44:20 +02:00
Miguel Ojeda
193b5a7574 rust: pin-init: use Markdown autolinks in Rust comments 
"Normal" comments in Rust (`//`) are also formatted in Markdown, like
the documentation (`///` and `//!`), see
Documentation/rust/coding-guidelines.rst

Thus use Markdown autolinks for a couple links that were missing it.

It also helps to get proper linking in some software like kitty [1].

Suggested-by: Benno Lossin <benno.lossin@proton.me>
Link: https://github.com/Rust-for-Linux/pin-init/pull/32#discussion_r2023103712 [1]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Link: dd230d61bf
Fixes: 84837cf6fa54 ("rust: pin-init: change examples to the user-space version")
Cc: stable@vger.kernel.org
[ Change case in title. Reworded commit message. - Benno ]
Signed-off-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250407201755.649153-3-benno.lossin@proton.me
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-04-08 21:12:58 +02:00
Miguel Ojeda
3c75fff196 rust: pin-init: alloc: restrict impl ZeroableOption for Box to T: Sized 
Similar to what was done for `Zeroable<NonNull<T>>` in commit
df27cef15360 ("rust: init: fix `Zeroable` implementation for
`Option<NonNull<T>>` and `Option<KBox<T>>`"), the latest Rust
documentation [1] says it guarantees that `transmute::<_,
Option<T>>([0u8; size_of::<T>()])` is sound and produces
`Option::<T>::None` only in some cases. In particular, it says:

    `Box<U>` (specifically, only `Box<U, Global>`) when `U: Sized`

Thus restrict the `impl` to `Sized`, and use similar wording as in that
commit too.

Link: https://doc.rust-lang.org/stable/std/option/index.html#representation [1]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Link: a6007cf555
Fixes: 9b2299af3b92 ("rust: pin-init: add `std` and `alloc` support from the user-space version")
Cc: stable@vger.kernel.org
[ Adjust mentioned commit to the one from the kernel. - Benno ]
Signed-off-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250407201755.649153-2-benno.lossin@proton.me
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-04-08 21:12:58 +02:00
Linus Torvalds
f4d2ef4825 Kbuild updates for v6.15 
- Improve performance in gendwarfksyms
 
  - Remove deprecated EXTRA_*FLAGS and KBUILD_ENABLE_EXTRA_GCC_CHECKS
 
  - Support CONFIG_HEADERS_INSTALL for ARCH=um
 
  - Use more relative paths to sources files for better reproducibility
 
  - Support the loong64 Debian architecture
 
  - Add Kbuild bash completion
 
  - Introduce intermediate vmlinux.unstripped for architectures that need
    static relocations to be stripped from the final vmlinux
 
  - Fix versioning in Debian packages for -rc releases
 
  - Treat missing MODULE_DESCRIPTION() as an error
 
  - Convert Nios2 Makefiles to use the generic rule for built-in DTB
 
  - Add debuginfo support to the RPM package
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Merge tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Improve performance in gendwarfksyms

 - Remove deprecated EXTRA_*FLAGS and KBUILD_ENABLE_EXTRA_GCC_CHECKS

 - Support CONFIG_HEADERS_INSTALL for ARCH=um

 - Use more relative paths to sources files for better reproducibility

 - Support the loong64 Debian architecture

 - Add Kbuild bash completion

 - Introduce intermediate vmlinux.unstripped for architectures that need
   static relocations to be stripped from the final vmlinux

 - Fix versioning in Debian packages for -rc releases

 - Treat missing MODULE_DESCRIPTION() as an error

 - Convert Nios2 Makefiles to use the generic rule for built-in DTB

 - Add debuginfo support to the RPM package

* tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (40 commits)
  kbuild: rpm-pkg: build a debuginfo RPM
  kconfig: merge_config: use an empty file as initfile
  nios2: migrate to the generic rule for built-in DTB
  rust: kbuild: skip `--remap-path-prefix` for `rustdoc`
  kbuild: pacman-pkg: hardcode module installation path
  kbuild: deb-pkg: don't set KBUILD_BUILD_VERSION unconditionally
  modpost: require a MODULE_DESCRIPTION()
  kbuild: make all file references relative to source root
  x86: drop unnecessary prefix map configuration
  kbuild: deb-pkg: add comment about future removal of KDEB_COMPRESS
  kbuild: Add a help message for "headers"
  kbuild: deb-pkg: remove "version" variable in mkdebian
  kbuild: deb-pkg: fix versioning for -rc releases
  Documentation/kbuild: Fix indentation in modules.rst example
  x86: Get rid of Makefile.postlink
  kbuild: Create intermediate vmlinux build with relocations preserved
  kbuild: Introduce Kconfig symbol for linking vmlinux with relocations
  kbuild: link-vmlinux.sh: Make output file name configurable
  kbuild: do not generate .tmp_vmlinux*.map when CONFIG_VMLINUX_MAP=y
  Revert "kheaders: Ignore silly-rename files"
  ...
 2025-04-05 15:46:50 -07:00
Linus Torvalds
e8b4712852 ARM and clkdev updates for 6.15-rc1 
- Simplify ARM_MMU_KEEP usage
 - Add Rust support for ARM architecture version 7
 - Align IPIs reported in /proc/interrupts
 - require linker to support KEEP within OVERLAY
 - add KEEP() for ARM vectors
 - add __printf() attribute for clkdev functions
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux

Pull ARM and clkdev updates from Russell King:

 - Simplify ARM_MMU_KEEP usage

 - Add Rust support for ARM architecture version 7

 - Align IPIs reported in /proc/interrupts

 - require linker to support KEEP within OVERLAY

 - add KEEP() for ARM vectors

 - add __printf() attribute for clkdev functions

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux:
  ARM: 9445/1: clkdev: Mark some functions with __printf() attribute
  ARM: 9444/1: add KEEP() keyword to ARM_VECTORS
  ARM: 9443/1: Require linker to support KEEP within OVERLAY for DCE
  ARM: 9442/1: smp: Fix IPI alignment in /proc/interrupts
  ARM: 9441/1: rust: Enable Rust support for ARMv7
  ARM: 9439/1: arm32: simplify ARM_MMU_KEEP usage
 2025-04-03 12:21:44 -07:00
Linus Torvalds
1c241cba19 LoongArch changes for v6.15 
1, Add jump table support for objtool;
 2, Always select HAVE_VIRT_CPU_ACCOUNTING_GEN;
 3, Enable UBSAN (Undefined Behavior Sanitizer);
 4, Increase MAX_IO_PICS up to 8;
 5, Increase ARCH_DMA_MINALIGN up to 16;
 6, Fix and improve BPF JIT;
 7, Fix and improve vDSO implementation;
 8, Update the default config file;
 9, Some bug fixes and other small changes.
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Merge tag 'loongarch-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch updates from Huacai Chen:

 - Always select HAVE_VIRT_CPU_ACCOUNTING_GEN

 - Enable UBSAN (Undefined Behavior Sanitizer)

 - Increase MAX_IO_PICS up to 8

 - Increase ARCH_DMA_MINALIGN up to 16

 - Fix and improve BPF JIT

 - Fix and improve vDSO implementation

 - Update the default config file

 - Some bug fixes and other small changes

* tag 'loongarch-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  LoongArch: Update Loongson-3 default config file
  LoongArch: vDSO: Make use of the t8 register for vgetrandom-chacha
  LoongArch: vDSO: Remove --hash-style=sysv
  LoongArch: BPF: Don't override subprog's return value
  LoongArch: BPF: Use move_addr() for BPF_PSEUDO_FUNC
  LoongArch: BPF: Fix off-by-one error in build_prologue()
  LoongArch: Rework the arch_kgdb_breakpoint() implementation
  LoongArch: Fix device node refcount leak in fdt_cpu_clk_init()
  LoongArch: Increase ARCH_DMA_MINALIGN up to 16
  LoongArch: Increase MAX_IO_PICS up to 8
  LoongArch: Fix help text of CMDLINE_EXTEND in Kconfig
  LoongArch: Enable UBSAN (Undefined Behavior Sanitizer)
  LoongArch: Always select HAVE_VIRT_CPU_ACCOUNTING_GEN
  rust: Fix enabling Rust and building with GCC for LoongArch
 2025-04-02 12:15:01 -07:00
Linus Torvalds
25601e8544 Char/Misc/IIO driver updates for 6.15-rc1 
Here is the big set of char, misc, iio, and other smaller driver
 subsystems for 6.15-rc1.  Lots of stuff in here, including:
   - loads of IIO changes and driver updates
   - counter driver updates
   - w1 driver updates
   - faux conversions for some drivers that were abusing the platform bus
     interface
   - coresight driver updates
   - rust miscdevice binding updates based on real-world-use
   - other minor driver updates
 
 All of these have been in linux-next with no reported issues for quite a
 while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc / IIO driver updates from Greg KH:
 "Here is the big set of char, misc, iio, and other smaller driver
  subsystems for 6.15-rc1. Lots of stuff in here, including:

   - loads of IIO changes and driver updates

   - counter driver updates

   - w1 driver updates

   - faux conversions for some drivers that were abusing the platform
     bus interface

   - coresight driver updates

   - rust miscdevice binding updates based on real-world-use

   - other minor driver updates

  All of these have been in linux-next with no reported issues for quite
  a while"

* tag 'char-misc-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (292 commits)
  samples: rust_misc_device: fix markup in top-level docs
  Coresight: Fix a NULL vs IS_ERR() bug in probe
  misc: lis3lv02d: convert to use faux_device
  tlclk: convert to use faux_device
  regulator: dummy: convert to use the faux device interface
  bus: mhi: host: Fix race between unprepare and queue_buf
  coresight: configfs: Constify struct config_item_type
  doc: iio: ad7380: describe offload support
  iio: ad7380: add support for SPI offload
  iio: light: Add check for array bounds in veml6075_read_int_time_ms
  iio: adc: ti-ads7924 Drop unnecessary function parameters
  staging: iio: ad9834: Use devm_regulator_get_enable()
  staging: iio: ad9832: Use devm_regulator_get_enable()
  iio: gyro: bmg160_spi: add of_match_table
  dt-bindings: iio: adc: Add i.MX94 and i.MX95 support
  iio: adc: ad7768-1: remove unnecessary locking
  Documentation: ABI: add wideband filter type to sysfs-bus-iio
  iio: adc: ad7768-1: set MOSI idle state to prevent accidental reset
  iio: adc: ad7768-1: Fix conversion result sign
  iio: adc: ad7124: Benefit of dev = indio_dev->dev.parent in ad7124_parse_channel_config()
  ...
 2025-04-01 11:26:08 -07:00
Linus Torvalds
2cd5769fb0 Driver core updates for 6.15-rc1 
Here is the big set of driver core updates for 6.15-rc1.  Lots of stuff
 happened this development cycle, including:
   - kernfs scaling changes to make it even faster thanks to rcu
   - bin_attribute constify work in many subsystems
   - faux bus minor tweaks for the rust bindings
   - rust binding updates for driver core, pci, and platform busses,
     making more functionaliy available to rust drivers.  These are all
     due to people actually trying to use the bindings that were in 6.14.
   - make Rafael and Danilo full co-maintainers of the driver core
     codebase
   - other minor fixes and updates.
 
 This has been in linux-next for a while now, with the only reported
 issue being some merge conflicts with the rust tree.  Depending on which
 tree you pull first, you will have conflicts in one of them.  The merge
 resolution has been in linux-next as an example of what to do, or can be
 found here:
 	https://lore.kernel.org/r/CANiq72n3Xe8JcnEjirDhCwQgvWoE65dddWecXnfdnbrmuah-RQ@mail.gmail.com
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updatesk from Greg KH:
 "Here is the big set of driver core updates for 6.15-rc1. Lots of stuff
  happened this development cycle, including:

   - kernfs scaling changes to make it even faster thanks to rcu

   - bin_attribute constify work in many subsystems

   - faux bus minor tweaks for the rust bindings

   - rust binding updates for driver core, pci, and platform busses,
     making more functionaliy available to rust drivers. These are all
     due to people actually trying to use the bindings that were in
     6.14.

   - make Rafael and Danilo full co-maintainers of the driver core
     codebase

   - other minor fixes and updates"

* tag 'driver-core-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (52 commits)
  rust: platform: require Send for Driver trait implementers
  rust: pci: require Send for Driver trait implementers
  rust: platform: impl Send + Sync for platform::Device
  rust: pci: impl Send + Sync for pci::Device
  rust: platform: fix unrestricted &mut platform::Device
  rust: pci: fix unrestricted &mut pci::Device
  rust: device: implement device context marker
  rust: pci: use to_result() in enable_device_mem()
  MAINTAINERS: driver core: mark Rafael and Danilo as co-maintainers
  rust/kernel/faux: mark Registration methods inline
  driver core: faux: only create the device if probe() succeeds
  rust/faux: Add missing parent argument to Registration::new()
  rust/faux: Drop #[repr(transparent)] from faux::Registration
  rust: io: fix devres test with new io accessor functions
  rust: io: rename `io::Io` accessors
  kernfs: Move dput() outside of the RCU section.
  efi: rci2: mark bin_attribute as __ro_after_init
  rapidio: constify 'struct bin_attribute'
  firmware: qemu_fw_cfg: constify 'struct bin_attribute'
  powerpc/perf/hv-24x7: Constify 'struct bin_attribute'
  ...
 2025-04-01 11:02:03 -07:00
Linus Torvalds
4e82c87058 Rust changes for v6.15 
Toolchain and infrastructure:
 
  - Extract the 'pin-init' API from the 'kernel' crate and make it into
    a standalone crate.
 
    In order to do this, the contents are rearranged so that they can
    easily be kept in sync with the version maintained out-of-tree that
    other projects have started to use too (or plan to, like QEMU).
 
    This will reduce the maintenance burden for Benno, who will now have
    his own sub-tree, and will simplify future expected changes like the
    move to use 'syn' to simplify the implementation.
 
  - Add '#[test]'-like support based on KUnit.
 
    We already had doctests support based on KUnit, which takes the
    examples in our Rust documentation and runs them under KUnit.
 
    Now, we are adding the beginning of the support for "normal" tests,
    similar to those the '#[test]' tests in userspace Rust. For instance:
 
        #[kunit_tests(my_suite)]
        mod tests {
            #[test]
            fn my_test() {
                assert_eq!(1 + 1, 2);
            }
        }
 
    Unlike with doctests, the 'assert*!'s do not map to the KUnit
    assertion APIs yet.
 
  - Check Rust signatures at compile time for functions called from C by
    name.
 
    In particular, introduce a new '#[export]' macro that can be placed
    in the Rust function definition. It will ensure that the function
    declaration on the C side matches the signature on the Rust function:
 
        #[export]
        pub unsafe extern "C" fn my_function(a: u8, b: i32) -> usize {
            // ...
        }
 
    The macro essentially forces the compiler to compare the types of
    the actual Rust function and the 'bindgen'-processed C signature.
 
    These cases are rare so far. In the future, we may consider
    introducing another tool, 'cbindgen', to generate C headers
    automatically. Even then, having these functions explicitly marked
    may be a good idea anyway.
 
  - Enable the 'raw_ref_op' Rust feature: it is already stable, and
    allows us to use the new '&raw' syntax, avoiding a couple macros.
    After everyone has migrated, we will disallow the macros.
 
  - Pass the correct target to 'bindgen' on Usermode Linux.
 
  - Fix 'rusttest' build in macOS.
 
 'kernel' crate:
 
  - New 'hrtimer' module: add support for setting up intrusive timers
    without allocating when starting the timer. Add support for
    'Pin<Box<_>>', 'Arc<_>', 'Pin<&_>' and 'Pin<&mut _>' as pointer types
    for use with timer callbacks. Add support for setting clock source
    and timer mode.
 
  - New 'dma' module: add a simple DMA coherent allocator abstraction and
    a test sample driver.
 
  - 'list' module: make the linked list 'Cursor' point between elements,
    rather than at an element, which is more convenient to us and allows
    for cursors to empty lists; and document it with examples of how to
    perform common operations with the provided methods.
 
  - 'str' module: implement a few traits for 'BStr' as well as the
    'strip_prefix()' method.
 
  - 'sync' module: add 'Arc::as_ptr'.
 
  - 'alloc' module: add 'Box::into_pin'.
 
  - 'error' module: extend the 'Result' documentation, including a few
    examples on different ways of handling errors, a warning about using
    methods that may panic, and links to external documentation.
 
 'macros' crate:
 
   - 'module' macro: add the 'authors' key to support multiple authors.
     The original key will be kept until everyone has migrated.
 
 Documentation:
 
  - Add error handling sections.
 
 MAINTAINERS:
 
  - Add Danilo Krummrich as reviewer of the Rust "subsystem".
 
  - Add 'RUST [PIN-INIT]' entry with Benno Lossin as maintainer. It has
    its own sub-tree.
 
  - Add sub-tree for 'RUST [ALLOC]'.
 
  - Add 'DMA MAPPING HELPERS DEVICE DRIVER API [RUST]' entry with Abdiel
    Janulgue as primary maintainer. It will go through the sub-tree of
    the 'RUST [ALLOC]' entry.
 
  - Add 'HIGH-RESOLUTION TIMERS [RUST]' entry with Andreas Hindborg as
    maintainer. It has its own sub-tree.
 
 And a few other cleanups and improvements.
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Merge tag 'rust-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux

Pull Rust updates from Miguel Ojeda:
 "Toolchain and infrastructure:

   - Extract the 'pin-init' API from the 'kernel' crate and make it into
     a standalone crate.

     In order to do this, the contents are rearranged so that they can
     easily be kept in sync with the version maintained out-of-tree that
     other projects have started to use too (or plan to, like QEMU).

     This will reduce the maintenance burden for Benno, who will now
     have his own sub-tree, and will simplify future expected changes
     like the move to use 'syn' to simplify the implementation.

   - Add '#[test]'-like support based on KUnit.

     We already had doctests support based on KUnit, which takes the
     examples in our Rust documentation and runs them under KUnit.

     Now, we are adding the beginning of the support for "normal" tests,
     similar to those the '#[test]' tests in userspace Rust. For
     instance:

         #[kunit_tests(my_suite)]
         mod tests {
             #[test]
             fn my_test() {
                 assert_eq!(1 + 1, 2);
             }
         }

     Unlike with doctests, the 'assert*!'s do not map to the KUnit
     assertion APIs yet.

   - Check Rust signatures at compile time for functions called from C
     by name.

     In particular, introduce a new '#[export]' macro that can be placed
     in the Rust function definition. It will ensure that the function
     declaration on the C side matches the signature on the Rust
     function:

         #[export]
         pub unsafe extern "C" fn my_function(a: u8, b: i32) -> usize {
             // ...
         }

     The macro essentially forces the compiler to compare the types of
     the actual Rust function and the 'bindgen'-processed C signature.

     These cases are rare so far. In the future, we may consider
     introducing another tool, 'cbindgen', to generate C headers
     automatically. Even then, having these functions explicitly marked
     may be a good idea anyway.

   - Enable the 'raw_ref_op' Rust feature: it is already stable, and
     allows us to use the new '&raw' syntax, avoiding a couple macros.
     After everyone has migrated, we will disallow the macros.

   - Pass the correct target to 'bindgen' on Usermode Linux.

   - Fix 'rusttest' build in macOS.

  'kernel' crate:

   - New 'hrtimer' module: add support for setting up intrusive timers
     without allocating when starting the timer. Add support for
     'Pin<Box<_>>', 'Arc<_>', 'Pin<&_>' and 'Pin<&mut _>' as pointer
     types for use with timer callbacks. Add support for setting clock
     source and timer mode.

   - New 'dma' module: add a simple DMA coherent allocator abstraction
     and a test sample driver.

   - 'list' module: make the linked list 'Cursor' point between
     elements, rather than at an element, which is more convenient to us
     and allows for cursors to empty lists; and document it with
     examples of how to perform common operations with the provided
     methods.

   - 'str' module: implement a few traits for 'BStr' as well as the
     'strip_prefix()' method.

   - 'sync' module: add 'Arc::as_ptr'.

   - 'alloc' module: add 'Box::into_pin'.

   - 'error' module: extend the 'Result' documentation, including a few
     examples on different ways of handling errors, a warning about
     using methods that may panic, and links to external documentation.

  'macros' crate:

   - 'module' macro: add the 'authors' key to support multiple authors.
     The original key will be kept until everyone has migrated.

  Documentation:

   - Add error handling sections.

  MAINTAINERS:

   - Add Danilo Krummrich as reviewer of the Rust "subsystem".

   - Add 'RUST [PIN-INIT]' entry with Benno Lossin as maintainer. It has
     its own sub-tree.

   - Add sub-tree for 'RUST [ALLOC]'.

   - Add 'DMA MAPPING HELPERS DEVICE DRIVER API [RUST]' entry with
     Abdiel Janulgue as primary maintainer. It will go through the
     sub-tree of the 'RUST [ALLOC]' entry.

   - Add 'HIGH-RESOLUTION TIMERS [RUST]' entry with Andreas Hindborg as
     maintainer. It has its own sub-tree.

  And a few other cleanups and improvements"

* tag 'rust-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux: (71 commits)
  rust: dma: add `Send` implementation for `CoherentAllocation`
  rust: macros: fix `make rusttest` build on macOS
  rust: block: refactor to use `&raw mut`
  rust: enable `raw_ref_op` feature
  rust: uaccess: name the correct function
  rust: rbtree: fix comments referring to Box instead of KBox
  rust: hrtimer: add maintainer entry
  rust: hrtimer: add clocksource selection through `ClockId`
  rust: hrtimer: add `HrTimerMode`
  rust: hrtimer: implement `HrTimerPointer` for `Pin<Box<T>>`
  rust: alloc: add `Box::into_pin`
  rust: hrtimer: implement `UnsafeHrTimerPointer` for `Pin<&mut T>`
  rust: hrtimer: implement `UnsafeHrTimerPointer` for `Pin<&T>`
  rust: hrtimer: add `hrtimer::ScopedHrTimerPointer`
  rust: hrtimer: add `UnsafeHrTimerPointer`
  rust: hrtimer: allow timer restart from timer handler
  rust: str: implement `strip_prefix` for `BStr`
  rust: str: implement `AsRef<BStr>` for `[u8]` and `BStr`
  rust: str: implement `Index` for `BStr`
  rust: str: implement `PartialEq` for `BStr`
  ...
 2025-03-30 17:03:26 -07:00
WANG Rui
13c23cb4ed rust: Fix enabling Rust and building with GCC for LoongArch 
This patch fixes a build issue on LoongArch when Rust is enabled and
compiled with GCC by explicitly setting the bindgen target and skipping
C flags that Clang doesn't support.

Cc: stable@vger.kernel.org
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: WANG Rui <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
 2025-03-30 16:30:20 +08:00
Linus Torvalds
0c86b42439 drm for 6.15-rc1 
uapi:
 - add mediatek tiled fourcc
 - add support for notifying userspace on device wedged
 
 new driver:
 - appletbdrm: support for Apple Touchbar displays on m1/m2
 - nova-core: skeleton rust driver to develop nova inside off
 
 firmware:
 - add some rust firmware pieces
 
 rust:
 - add 'LocalModule' type alias
 
 component:
 - add helper to query bound status
 
 fbdev:
 - fbtft: remove access to page->index
 
 media:
 - cec: tda998x: import driver from drm
 
 dma-buf:
 - add fast path for single fence merging
 
 tests:
 - fix lockdep warnings
 
 atomic:
 - allow full modeset on connector changes
 - clarify semantics of allow_modeset and drm_atomic_helper_check
 - async-flip: support on arbitary planes
 - writeback: fix UAF
 - Document atomic-state history
 
 format-helper:
 - support ARGB8888 to ARGB4444 conversions
 
 buddy:
 - fix multi-root cleanup
 
 ci:
 - update IGT
 
 dp:
 - support extended wake timeout
 - mst: fix RAD to string conversion
 - increase DPCD eDP control CAP size to 5 bytes
 - add DPCD eDP v1.5 definition
 - add helpers for LTTPR transparent mode
 
 panic:
 - encode QR code according to Fido 2.2
 
 scheduler:
 - add parameter struct for init
 - improve job peek/pop operations
 - optimise drm_sched_job struct layout
 
 ttm:
 - refactor pool allocation
 - add helpers for TTM shrinker
 
 panel-orientation:
 - add a bunch of new quirks
 
 panel:
 - convert panels to multi-style functions
 - edp: Add support for B140UAN04.4, BOE NV140FHM-NZ, CSW MNB601LS1-3,
   LG LP079QX1-SP0V, MNE007QS3-7, STA 116QHD024002, Starry 116KHD024006,
   Lenovo T14s Gen6 Snapdragon
 - himax-hx83102: Add support for CSOT PNA957QT1-1, Kingdisplay
   kd110n11-51ie, Starry 2082109qfh040022-50e
 - visionox-r66451: use multi-style MIPI-DSI functions
 - raydium-rm67200: Add driver for Raydium RM67200
 - simple: Add support for BOE AV123Z7M-N17, BOE AV123Z7M-N17
 - sony-td4353-jdi: Use MIPI-DSI multi-func interface
 - summit: Add driver for Apple Summit display panel
 - visionox-rm692e5: Add driver for Visionox RM692E5
 
 bridge:
 - pass full atomic state to various callbacks
 - adv7511: Report correct capabilities
 - it6505: Fix HDCP V compare
 - snd65dsi86: fix device IDs
 - nwl-dsi: set bridge type
 - ti-sn65si83: add error recovery and set bridge type
 - synopsys: add HDMI audio support
 
 xe:
 - support device-wedged event
 - add mmap support for PCI memory barrier
 - perf pmu integration and expose per-engien activity
 - add EU stall sampling support
 - GPU SVM and Xe SVM implementation
 - use TTM shrinker
 - add survivability mode to allow the driver to do
   firmware updates in critical failure states
 - PXP HWDRM support for MTL and LNL
 - expose package/vram temps over hwmon
 - enable DP tunneling
 - drop mmio_ext abstraction
 - Reject BO evcition if BO is bound to current VM
 - Xe suballocator improvements
 - re-use display vmas when possible
 - add GuC Buffer Cache abstraction
 - PCI ID update for Panther Lake and Battlemage
 - Enable SRIOV for Panther Lake
 - Refactor VRAM manager location
 
 i915:
 - enable extends wake timeout
 - support device-wedged event
 - Enable DP 128b/132b SST DSC
 - FBC dirty rectangle support for display version 30+
 - convert i915/xe to drm client setup
 - Compute HDMI PLLS for rates not in fixed tables
 - Allow DSB usage when PSR is enabled on LNL+
 - Enable panel replay without full modeset
 - Enable async flips with compressed buffers on ICL+
 - support luminance based brightness via DPCD for eDP
 - enable VRR enable/disable without full modeset
 - allow GuC SLPC default strategies on MTL+ for performance
 - lots of display refactoring in move to struct intel_display
 
 amdgpu:
 - add device wedged event
 - support async page flips on overlay planes
 - enable broadcast RGB drm property
 - add info ioctl for virt mode
 - OEM i2c support for RGB lights
 - GC 11.5.2 + 11.5.3 support
 - SDMA 6.1.3 support
 - NBIO 7.9.1 + 7.11.2 support
 - MMHUB 1.8.1 + 3.3.2 support
 - DCN 3.6.0 support
 - Add dynamic workload profile switching for GC 10-12
 - support larger VBIOS sizes
 - Mark gttsize parameters as deprecated
 - Initial JPEG queue resset support
 
 amdkfd:
 - add KFD per process flags for setting precision
 - sync pasid values between KGD and KFD
 - improve GTT/VRAM handling for APUs
 - fix user queue validation on GC7/8
 - SDMA queue reset support
 
 raedeon:
 - rs400 hyperz fix
 
 i2c:
 - td998x: drop platform_data, split driver into media and bridge
 
 ast:
 - transmitter chip detection refactoring
 - vbios display mode refactoring
 - astdp: fix connection status and filter unsupported modes
 - cursor handling refactoring
 
 imagination:
 - check job dependencies with sched helper
 
 ivpu:
 - improve command queue handling
 - use workqueue for IRQ handling
 - add support HW fault injection
 - locking fixes
 
 mgag200:
 - add support for G200eH5
 
 msm:
 - dpu: add concurrent writeback support for DPU 10.x+
 - use LTTPR helpers
 - GPU:
   - Fix obscure GMU suspend failure
   - Expose syncobj timeline support
   - Extend GPU devcoredump with pagetable info
   - a623 support
   - Fix a6xx gen1/gen2 indexed-register blocks in gpu snapshot / devcoredump
 - Display:
   - Add cpu-cfg interconnect paths on SM8560 and SM8650
   - Introduce KMS OMMU fault handler, causing devcoredump snapshot
   - Fixed error pointer dereference in msm_kms_init_aspace()
 - DPU:
   - Fix mode_changing handling
   - Add writeback support on SM6150 (QCS615)
   - Fix DSC programming in 1:1:1 topology
   - Reworked hardware resource allocation, moving it to the CRTC code
   - Enabled support for Concurrent WriteBack (CWB) on SM8650
   - Enabled CDM blocks on all relevant platforms
   - Reworked debugfs interface for BW/clocks debugging
   - Clear perf params before calculating bw
   - Support YUV formats on writeback
   - Fixed double inclusion
   - Fixed writeback in YUV formats when using cloned output, Dropped
     wb2_formats_rgb
   - Corrected dpu_crtc_check_mode_changed and struct dpu_encoder_virt
     kerneldocs
   - Fixed uninitialized variable in dpu_crtc_kickoff_clone_mode()
 - DSI:
   - DSC-related fixes
   - Rework clock programming
 - DSI PHY:
   - Fix 7nm (and lower) PHY programming
   - Add proper DT schema definitions for DSI PHY clocks
 - HDMI:
   - Rework the driver, enabling the use of the HDMI Connector framework
 - Bindings:
   - Added eDP PHY on SA8775P
 
 nouveau:
 - move drm_slave_encoder interface into driver
 - nvkm: refactor GSP RPC
 - use LTTPR helpers
 
 mediatek:
 - HDMI fixup and refinement
 - add MT8188 dsc compatible
 - MT8365 SoC support
 
 panthor:
 - Expose sizes of intenral BOs via fdinfo
 - Fix race between reset and suspend
 - Improve locking
 
 qaic:
 - Add support for AIC200
 
 renesas:
 - Fix limits in DT bindings
 
 rockchip:
 - support rk3562-mali
 - rk3576: Add HDMI support
 - vop2: Add new display modes on RK3588 HDMI0 up to 4K
 - Don't change HDMI reference clock rate
 - Fix DT bindings
 - analogix_dp: add eDP support
 - fix shutodnw
 
 solomon:
 - Set SPI device table to silence warnings
 - Fix pixel and scanline encoding
 
 v3d:
 - handle clock
 
 vc4:
 - Use drm_exec
 - Use dma-resv for wait-BO ioctl
 - Remove seqno infrastructure
 
 virtgpu:
 - Support partial mappings of GEM objects
 - Reserve VGA resources during initialization
 - Fix UAF in virtgpu_dma_buf_free_obj()
 - Add panic support
 
 vkms:
 - Switch to a managed modesetting pipeline
 - Add support for ARGB8888
 - fix UAf
 
 xlnx:
 - Set correct DMA segment size
 - use mutex guards
 - Fix error handling
 - Fix docs
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Merge tag 'drm-next-2025-03-28' of https://gitlab.freedesktop.org/drm/kernel

Pull drm updates from Dave Airlie:
 "Outside of drm there are some rust patches from Danilo who maintains
  that area in here, and some pieces for drm header check tests.

  The major things in here are a new driver supporting the touchbar
  displays on M1/M2, the nova-core stub driver which is just the vehicle
  for adding rust abstractions and start developing a real driver inside
  of.

  xe adds support for SVM with a non-driver specific SVM core
  abstraction that will hopefully be useful for other drivers, along
  with support for shrinking for TTM devices. I'm sure xe and AMD
  support new devices, but the pipeline depth on these things is hard to
  know what they end up being in the marketplace!

  uapi:
   - add mediatek tiled fourcc
   - add support for notifying userspace on device wedged

  new driver:
   - appletbdrm: support for Apple Touchbar displays on m1/m2
   - nova-core: skeleton rust driver to develop nova inside off

  firmware:
   - add some rust firmware pieces

  rust:
   - add 'LocalModule' type alias

  component:
   - add helper to query bound status

  fbdev:
   - fbtft: remove access to page->index

  media:
   - cec: tda998x: import driver from drm

  dma-buf:
   - add fast path for single fence merging

  tests:
   - fix lockdep warnings

  atomic:
   - allow full modeset on connector changes
   - clarify semantics of allow_modeset and drm_atomic_helper_check
   - async-flip: support on arbitary planes
   - writeback: fix UAF
   - Document atomic-state history

  format-helper:
   - support ARGB8888 to ARGB4444 conversions

  buddy:
   - fix multi-root cleanup

  ci:
   - update IGT

  dp:
   - support extended wake timeout
   - mst: fix RAD to string conversion
   - increase DPCD eDP control CAP size to 5 bytes
   - add DPCD eDP v1.5 definition
   - add helpers for LTTPR transparent mode

  panic:
   - encode QR code according to Fido 2.2

  scheduler:
   - add parameter struct for init
   - improve job peek/pop operations
   - optimise drm_sched_job struct layout

  ttm:
   - refactor pool allocation
   - add helpers for TTM shrinker

  panel-orientation:
   - add a bunch of new quirks

  panel:
   - convert panels to multi-style functions
   - edp: Add support for B140UAN04.4, BOE NV140FHM-NZ, CSW MNB601LS1-3,
     LG LP079QX1-SP0V, MNE007QS3-7, STA 116QHD024002, Starry
     116KHD024006, Lenovo T14s Gen6 Snapdragon
   - himax-hx83102: Add support for CSOT PNA957QT1-1, Kingdisplay
     kd110n11-51ie, Starry 2082109qfh040022-50e
   - visionox-r66451: use multi-style MIPI-DSI functions
   - raydium-rm67200: Add driver for Raydium RM67200
   - simple: Add support for BOE AV123Z7M-N17, BOE AV123Z7M-N17
   - sony-td4353-jdi: Use MIPI-DSI multi-func interface
   - summit: Add driver for Apple Summit display panel
   - visionox-rm692e5: Add driver for Visionox RM692E5

  bridge:
   - pass full atomic state to various callbacks
   - adv7511: Report correct capabilities
   - it6505: Fix HDCP V compare
   - snd65dsi86: fix device IDs
   - nwl-dsi: set bridge type
   - ti-sn65si83: add error recovery and set bridge type
   - synopsys: add HDMI audio support

  xe:
   - support device-wedged event
   - add mmap support for PCI memory barrier
   - perf pmu integration and expose per-engien activity
   - add EU stall sampling support
   - GPU SVM and Xe SVM implementation
   - use TTM shrinker
   - add survivability mode to allow the driver to do firmware updates
     in critical failure states
   - PXP HWDRM support for MTL and LNL
   - expose package/vram temps over hwmon
   - enable DP tunneling
   - drop mmio_ext abstraction
   - Reject BO evcition if BO is bound to current VM
   - Xe suballocator improvements
   - re-use display vmas when possible
   - add GuC Buffer Cache abstraction
   - PCI ID update for Panther Lake and Battlemage
   - Enable SRIOV for Panther Lake
   - Refactor VRAM manager location

  i915:
   - enable extends wake timeout
   - support device-wedged event
   - Enable DP 128b/132b SST DSC
   - FBC dirty rectangle support for display version 30+
   - convert i915/xe to drm client setup
   - Compute HDMI PLLS for rates not in fixed tables
   - Allow DSB usage when PSR is enabled on LNL+
   - Enable panel replay without full modeset
   - Enable async flips with compressed buffers on ICL+
   - support luminance based brightness via DPCD for eDP
   - enable VRR enable/disable without full modeset
   - allow GuC SLPC default strategies on MTL+ for performance
   - lots of display refactoring in move to struct intel_display

  amdgpu:
   - add device wedged event
   - support async page flips on overlay planes
   - enable broadcast RGB drm property
   - add info ioctl for virt mode
   - OEM i2c support for RGB lights
   - GC 11.5.2 + 11.5.3 support
   - SDMA 6.1.3 support
   - NBIO 7.9.1 + 7.11.2 support
   - MMHUB 1.8.1 + 3.3.2 support
   - DCN 3.6.0 support
   - Add dynamic workload profile switching for GC 10-12
   - support larger VBIOS sizes
   - Mark gttsize parameters as deprecated
   - Initial JPEG queue resset support

  amdkfd:
   - add KFD per process flags for setting precision
   - sync pasid values between KGD and KFD
   - improve GTT/VRAM handling for APUs
   - fix user queue validation on GC7/8
   - SDMA queue reset support

  raedeon:
   - rs400 hyperz fix

  i2c:
   - td998x: drop platform_data, split driver into media and bridge

  ast:
   - transmitter chip detection refactoring
   - vbios display mode refactoring
   - astdp: fix connection status and filter unsupported modes
   - cursor handling refactoring

  imagination:
   - check job dependencies with sched helper

  ivpu:
   - improve command queue handling
   - use workqueue for IRQ handling
   - add support HW fault injection
   - locking fixes

  mgag200:
   - add support for G200eH5

  msm:
   - dpu: add concurrent writeback support for DPU 10.x+
   - use LTTPR helpers
   - GPU:
     - Fix obscure GMU suspend failure
     - Expose syncobj timeline support
     - Extend GPU devcoredump with pagetable info
     - a623 support
     - Fix a6xx gen1/gen2 indexed-register blocks in gpu snapshot /
       devcoredump
   - Display:
     - Add cpu-cfg interconnect paths on SM8560 and SM8650
     - Introduce KMS OMMU fault handler, causing devcoredump snapshot
     - Fixed error pointer dereference in msm_kms_init_aspace()
   - DPU:
     - Fix mode_changing handling
     - Add writeback support on SM6150 (QCS615)
     - Fix DSC programming in 1:1:1 topology
     - Reworked hardware resource allocation, moving it to the CRTC code
     - Enabled support for Concurrent WriteBack (CWB) on SM8650
     - Enabled CDM blocks on all relevant platforms
     - Reworked debugfs interface for BW/clocks debugging
     - Clear perf params before calculating bw
     - Support YUV formats on writeback
     - Fixed double inclusion
     - Fixed writeback in YUV formats when using cloned output, Dropped
       wb2_formats_rgb
     - Corrected dpu_crtc_check_mode_changed and struct dpu_encoder_virt
       kerneldocs
     - Fixed uninitialized variable in dpu_crtc_kickoff_clone_mode()
   - DSI:
     - DSC-related fixes
     - Rework clock programming
   - DSI PHY:
     - Fix 7nm (and lower) PHY programming
     - Add proper DT schema definitions for DSI PHY clocks
   - HDMI:
     - Rework the driver, enabling the use of the HDMI Connector
       framework
   - Bindings:
     - Added eDP PHY on SA8775P

  nouveau:
   - move drm_slave_encoder interface into driver
   - nvkm: refactor GSP RPC
   - use LTTPR helpers

  mediatek:
   - HDMI fixup and refinement
   - add MT8188 dsc compatible
   - MT8365 SoC support

  panthor:
   - Expose sizes of intenral BOs via fdinfo
   - Fix race between reset and suspend
   - Improve locking

  qaic:
   - Add support for AIC200

  renesas:
   - Fix limits in DT bindings

  rockchip:
   - support rk3562-mali
   - rk3576: Add HDMI support
   - vop2: Add new display modes on RK3588 HDMI0 up to 4K
   - Don't change HDMI reference clock rate
   - Fix DT bindings
   - analogix_dp: add eDP support
   - fix shutodnw

  solomon:
   - Set SPI device table to silence warnings
   - Fix pixel and scanline encoding

  v3d:
   - handle clock

  vc4:
   - Use drm_exec
   - Use dma-resv for wait-BO ioctl
   - Remove seqno infrastructure

  virtgpu:
   - Support partial mappings of GEM objects
   - Reserve VGA resources during initialization
   - Fix UAF in virtgpu_dma_buf_free_obj()
   - Add panic support

  vkms:
   - Switch to a managed modesetting pipeline
   - Add support for ARGB8888
   - fix UAf

  xlnx:
   - Set correct DMA segment size
   - use mutex guards
   - Fix error handling
   - Fix docs"

* tag 'drm-next-2025-03-28' of https://gitlab.freedesktop.org/drm/kernel: (1762 commits)
  drm/amd/pm: Update feature list for smu_v13_0_6
  drm/amdgpu: Add parameter documentation for amdgpu_sync_fence
  drm/amdgpu/discovery: optionally use fw based ip discovery
  drm/amdgpu/discovery: use specific ip_discovery.bin for legacy asics
  drm/amdgpu/discovery: check ip_discovery fw file available
  drm/amd/pm: Remove unnecessay UQ10 to UINT conversion
  drm/amd/pm: Remove unnecessay UQ10 to UINT conversion
  drm/amdgpu/sdma_v4_4_2: update VM flush implementation for SDMA
  drm/amdgpu: Optimize VM invalidation engine allocation and synchronize GPU TLB flush
  drm/amd/amdgpu: Increase max rings to enable SDMA page ring
  drm/amdgpu: Decode deferred error type in gfx aca bank parser
  drm/amdgpu/gfx11: Add Cleaner Shader Support for GFX11.5 GPUs
  drm/amdgpu/mes: clean up SDMA HQD loop
  drm/amdgpu/mes: enable compute pipes across all MEC
  drm/amdgpu/mes: drop MES 10.x leftovers
  drm/amdgpu/mes: optimize compute loop handling
  drm/amdgpu/sdma: guilty tracking is per instance
  drm/amdgpu/sdma: fix engine reset handling
  drm/amdgpu: remove invalid usage of sched.ready
  drm/amdgpu: add cleaner shader trace point
  ...
 2025-03-28 17:44:52 -07:00
Christian Schrrefl
ccb8ce5268 ARM: 9441/1: rust: Enable Rust support for ARMv7 
This commit allows building ARMv7 kernels with Rust support.

The rust core library expects some __eabi_... functions
that are not implemented in the kernel.
Those functions are some float operations and __aeabi_uldivmod.
For now those are implemented with define_panicking_intrinsics!.

This is based on the code by Sven Van Asbroeck from the original
rust branch and inspired by the AArch version by Jamie Cunliffe.

I have tested the rust samples and a custom simple MMIO module
on hardware (De1SoC FPGA + Arm A9 CPU).

Tested-by: Rudraksha Gupta <guptarud@gmail.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Tested-by: Miguel Ojeda <ojeda@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Christian Schrefl <chrisi.schrefl@gmail.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
 2025-03-26 13:31:16 +00:00
Linus Torvalds
054570267d lsm/stable-6.15 PR 20250323 
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Merge tag 'lsm-pr-20250323' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm

Pull lsm updates from Paul Moore:

 - Various minor updates to the LSM Rust bindings

   Changes include marking trivial Rust bindings as inlines and comment
   tweaks to better reflect the LSM hooks.

 - Add LSM/SELinux access controls to io_uring_allowed()

   Similar to the io_uring_disabled sysctl, add a LSM hook to
   io_uring_allowed() to enable LSMs a simple way to enforce security
   policy on the use of io_uring. This pull request includes SELinux
   support for this new control using the io_uring/allowed permission.

 - Remove an unused parameter from the security_perf_event_open() hook

   The perf_event_attr struct parameter was not used by any currently
   supported LSMs, remove it from the hook.

 - Add an explicit MAINTAINERS entry for the credentials code

   We've seen problems in the past where patches to the credentials code
   sent by non-maintainers would often languish on the lists for
   multiple months as there was no one explicitly tasked with the
   responsibility of reviewing and/or merging credentials related code.

   Considering that most of the code under security/ has a vested
   interest in ensuring that the credentials code is well maintained,
   I'm volunteering to look after the credentials code and Serge Hallyn
   has also volunteered to step up as an official reviewer. I posted the
   MAINTAINERS update as a RFC to LKML in hopes that someone else would
   jump up with an "I'll do it!", but beyond Serge it was all crickets.

 - Update Stephen Smalley's old email address to prevent confusion

   This includes a corresponding update to the mailmap file.

* tag 'lsm-pr-20250323' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm:
  mailmap: map Stephen Smalley's old email addresses
  lsm: remove old email address for Stephen Smalley
  MAINTAINERS: add Serge Hallyn as a credentials reviewer
  MAINTAINERS: add an explicit credentials entry
  cred,rust: mark Credential methods inline
  lsm,rust: reword "destroy" -> "release" in SecurityCtx
  lsm,rust: mark SecurityCtx methods inline
  perf: Remove unnecessary parameter of security check
  lsm: fix a missing security_uring_allowed() prototype
  io_uring,lsm,selinux: add LSM hooks for io_uring_setup()
  io_uring: refactor io_uring_allowed()
 2025-03-25 15:44:19 -07:00
Miguel Ojeda
e6ea10d5db Rust hrtimer API for v6.15 
Introduce Rust support for the `hrtimer` subsystem:
 
  - Add a way to use the `hrtimer` subsystem from Rust. Rust code can now set up
    intrusive timers without allocating when starting the timer.
 
  - Add support for `Pin<Box<_>>`, `Arc<_>`, `Pin<&_>` and `Pin<&mut _>` as
    pointer types for use with timer callbacks.
 
  - Add support for setting clock source and timer mode.
 
 `kernel` crate:
 
  - Add `Arc::as_ptr` for converting an `Arc` to a raw pointer. This is a
    dependency for the `hrtimer` API.
 
  - Add `Box::into_pin` for converting a `Box<_>` into a `Pin<Box<_>>` to align
    with Rust `alloc`. This is a dependency for the `hrtimer` API.
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Merge tag 'rust-hrtimer-for-v6.15-v3' of https://github.com/Rust-for-Linux/linux into rust-next

Pull rust-hrtimer updates from Andreas Hindborg:
 "Introduce Rust support for the 'hrtimer' subsystem:

   - Add a way to use the 'hrtimer' subsystem from Rust. Rust code can
     now set up intrusive timers without allocating when starting the
     timer.

   - Add support for 'Pin<Box<_>>', 'Arc<_>', 'Pin<&_>' and
     'Pin<&mut _>' as pointer types for use with timer callbacks.

   - Add support for setting clock source and timer mode.

  'kernel' crate:

   - Add 'Arc::as_ptr' for converting an 'Arc' to a raw pointer. This is
     a dependency for the 'hrtimer' API.

   - Add 'Box::into_pin' for converting a 'Box<_>' into a 'Pin<Box<_>>'
     to align with Rust 'alloc'. This is a dependency for the 'hrtimer'
     API."

* tag 'rust-hrtimer-for-v6.15-v3' of https://github.com/Rust-for-Linux/linux:
  rust: hrtimer: add maintainer entry
  rust: hrtimer: add clocksource selection through `ClockId`
  rust: hrtimer: add `HrTimerMode`
  rust: hrtimer: implement `HrTimerPointer` for `Pin<Box<T>>`
  rust: alloc: add `Box::into_pin`
  rust: hrtimer: implement `UnsafeHrTimerPointer` for `Pin<&mut T>`
  rust: hrtimer: implement `UnsafeHrTimerPointer` for `Pin<&T>`
  rust: hrtimer: add `hrtimer::ScopedHrTimerPointer`
  rust: hrtimer: add `UnsafeHrTimerPointer`
  rust: hrtimer: allow timer restart from timer handler
  rust: hrtimer: implement `HrTimerPointer` for `Arc`
  rust: sync: add `Arc::as_ptr`
  rust: hrtimer: introduce hrtimer support
 2025-03-25 23:41:14 +01:00
Linus Torvalds
23608993bb Locking changes for v6.15: 
Locking primitives:
 
     - Micro-optimize percpu_{,try_}cmpxchg{64,128}_op() and {,try_}cmpxchg{64,128}
       on x86 (Uros Bizjak)
 
     - mutexes: extend debug checks in mutex_lock() (Yunhui Cui)
 
     - Misc cleanups (Uros Bizjak)
 
   Lockdep:
 
     - Fix might_fault() lockdep check of current->mm->mmap_lock (Peter Zijlstra)
 
     - Don't disable interrupts on RT in disable_irq_nosync_lockdep.*()
       (Sebastian Andrzej Siewior)
 
     - Disable KASAN instrumentation of lockdep.c (Waiman Long)
 
     - Add kasan_check_byte() check in lock_acquire() (Waiman Long)
 
     - Misc cleanups (Sebastian Andrzej Siewior)
 
   Rust runtime integration:
 
     - Use Pin for all LockClassKey usages (Mitchell Levy)
     - sync: Add accessor for the lock behind a given guard (Alice Ryhl)
     - sync: condvar: Add wait_interruptible_freezable() (Alice Ryhl)
     - sync: lock: Add an example for Guard:: Lock_ref() (Boqun Feng)
 
   Split-lock detection feature (x86):
 
     - Fix warning mode with disabled mitigation mode (Maksim Davydov)
 
   Locking events:
 
     - Add locking events for rtmutex slow paths (Waiman Long)
     - Add locking events for lockdep (Waiman Long)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:
 "Locking primitives:
   - Micro-optimize percpu_{,try_}cmpxchg{64,128}_op() and
     {,try_}cmpxchg{64,128} on x86 (Uros Bizjak)
   - mutexes: extend debug checks in mutex_lock() (Yunhui Cui)
   - Misc cleanups (Uros Bizjak)

  Lockdep:
   - Fix might_fault() lockdep check of current->mm->mmap_lock (Peter
     Zijlstra)
   - Don't disable interrupts on RT in disable_irq_nosync_lockdep.*()
     (Sebastian Andrzej Siewior)
   - Disable KASAN instrumentation of lockdep.c (Waiman Long)
   - Add kasan_check_byte() check in lock_acquire() (Waiman Long)
   - Misc cleanups (Sebastian Andrzej Siewior)

  Rust runtime integration:
   - Use Pin for all LockClassKey usages (Mitchell Levy)
   - sync: Add accessor for the lock behind a given guard (Alice Ryhl)
   - sync: condvar: Add wait_interruptible_freezable() (Alice Ryhl)
   - sync: lock: Add an example for Guard:: Lock_ref() (Boqun Feng)

  Split-lock detection feature (x86):
   - Fix warning mode with disabled mitigation mode (Maksim Davydov)

  Locking events:
   - Add locking events for rtmutex slow paths (Waiman Long)
   - Add locking events for lockdep (Waiman Long)"

* tag 'locking-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  lockdep: Remove disable_irq_lockdep()
  lockdep: Don't disable interrupts on RT in disable_irq_nosync_lockdep.*()
  rust: lockdep: Use Pin for all LockClassKey usages
  rust: sync: condvar: Add wait_interruptible_freezable()
  rust: sync: lock: Add an example for Guard:: Lock_ref()
  rust: sync: Add accessor for the lock behind a given guard
  locking/lockdep: Add kasan_check_byte() check in lock_acquire()
  locking/lockdep: Disable KASAN instrumentation of lockdep.c
  locking/lock_events: Add locking events for lockdep
  locking/lock_events: Add locking events for rtmutex slow paths
  x86/split_lock: Fix the delayed detection logic
  lockdep/mm: Fix might_fault() lockdep check of current->mm->mmap_lock
  x86/locking: Remove semicolon from "lock" prefix
  locking/mutex: Add MUTEX_WARN_ON() into fast path
  x86/locking: Use asm_inline for {,try_}cmpxchg{64,128} emulations
  x86/locking: Use ALT_OUTPUT_SP() for percpu_{,try_}cmpxchg{64,128}_op()
 2025-03-24 20:55:03 -07:00
Linus Torvalds
2f2d529458 bitmap changes for 6.15 
This includes:
  - cpumask_next_wrap() rework from me;
  - GENMASK() simplification from I Hsin;
  - rust bindings for cpumasks from Viresh and me;
  - scattered cleanups from Andy, Tamir, Vincent, Ignacio and Joel.
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Merge tag 'bitmap-for-6.15' of https://github.com/norov/linux

Pull bitmap updates from Yury Norov:

 - cpumask_next_wrap() rework (me)

 - GENMASK() simplification (I Hsin)

 - rust bindings for cpumasks (Viresh and me)

 - scattered cleanups (Andy, Tamir, Vincent, Ignacio and Joel)

* tag 'bitmap-for-6.15' of https://github.com/norov/linux: (22 commits)
  cpumask: align text in comment
  riscv: fix test_and_{set,clear}_bit ordering documentation
  treewide: fix typo 'unsigned __init128' -> 'unsigned __int128'
  MAINTAINERS: add rust bindings entry for bitmap API
  rust: Add cpumask helpers
  uapi: Revert "bitops: avoid integer overflow in GENMASK(_ULL)"
  cpumask: drop cpumask_next_wrap_old()
  PCI: hv: Switch hv_compose_multi_msi_req_get_cpu() to using cpumask_next_wrap()
  scsi: lpfc: rework lpfc_next_{online,present}_cpu()
  scsi: lpfc: switch lpfc_irq_rebalance() to using cpumask_next_wrap()
  s390: switch stop_machine_yield() to using cpumask_next_wrap()
  padata: switch padata_find_next() to using cpumask_next_wrap()
  cpumask: use cpumask_next_wrap() where appropriate
  cpumask: re-introduce cpumask_next{,_and}_wrap()
  cpumask: deprecate cpumask_next_wrap()
  powerpc/xmon: simplify xmon_batch_next_cpu()
  ibmvnic: simplify ibmvnic_set_queue_affinity()
  virtio_net: simplify virtnet_set_affinity()
  objpool: rework objpool_pop()
  cpumask: add for_each_{possible,online}_cpu_wrap
  ...
 2025-03-24 19:11:58 -07:00
Linus Torvalds
b05f8fbe0f workqueue: Changes for v6.15 
Just one commit to expose system BH workqueues to rust.
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Merge tag 'wq-for-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

Pull workqueue update from Tejun Heo:
 "Just one commit to expose system BH workqueues to rust"

* tag 'wq-for-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  rust: workqueue: define built-in bh queues
 2025-03-24 16:46:03 -07:00
Linus Torvalds
56e7a8b051 vfs-6.15-rc1.rust 
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Merge tag 'vfs-6.15-rc1.rust' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs rust updates from Christian Brauner:
 "This contains minor fixes and improvements to rust file bindings:

   - Optimize rust symbol generation for FileDescriptorReservation

   - Optimize rust symbol generation for SeqFile"

* tag 'vfs-6.15-rc1.rust' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  rust: optimize rust symbol generation for SeqFile
  rust: file: optimize rust symbol generation for FileDescriptorReservation
 2025-03-24 13:35:36 -07:00
Danilo Krummrich
28bb48c4cb rust: dma: add Send implementation for CoherentAllocation 
Stephen found a future build failure in linux-next [1]:

    error[E0277]: `*mut MyStruct` cannot be sent between threads safely
      --> samples/rust/rust_dma.rs:47:22
       |
    47 | impl pci::Driver for DmaSampleDriver {
       |                      ^^^^^^^^^^^^^^^ `*mut MyStruct` cannot be sent between threads safely

It is caused by the interaction between commit 935e1d90bf6f ("rust: pci:
require Send for Driver trait implementers") from the driver-core tree,
which fixes a missing concurrency requirement, and commit 9901addae63b
("samples: rust: add Rust dma test sample driver") which adds a sample
that does not satisfy that requirement.

Add a `Send` implementation to `CoherentAllocation`, which allows the
sample (and other future users) to satisfy it.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/linux-next/20250324215702.1515ba92@canb.auug.org.au/ [1]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20250324174048.1075597-1-ojeda@kernel.org
[ Added number to Closes. Fix typo spotted by Boqun. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-24 20:14:10 +01:00
Tamir Duberstein
a0b539ad36 rust: macros: fix make rusttest build on macOS 
Do not emit `#[link_section = ".modinfo"]` on macOS (i.e. when building
userspace tests); .modinfo is not a legal section specifier in mach-o.

Before this change tests failed to compile:

  ---- ../rust/macros/lib.rs - module (line 66) stdout ----
  rustc-LLVM ERROR: Global variable '_ZN8rust_out13__module_init13__module_init27__MY_DEVICE_DRIVER_MODULE_017h141f80536770e0d4E' has an invalid section specifier '.modinfo': mach-o section specifier requires a segment and section separated by a comma.
  Couldn't compile the test.
  ---- ../rust/macros/lib.rs - module (line 33) stdout ----
  rustc-LLVM ERROR: Global variable '_ZN8rust_out13__module_init13__module_init20__MY_KERNEL_MODULE_017h5d79189564b41e07E' has an invalid section specifier '.modinfo': mach-o section specifier requires a segment and section separated by a comma.
  Couldn't compile the test.

Signed-off-by: Tamir Duberstein <tamird@gmail.com>
Link: https://lore.kernel.org/r/20250210-macros-section-v2-1-3bb9ff44b969@gmail.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-23 22:14:32 +01:00
Antonio Hickey
2a571248df rust: block: refactor to use &raw mut 
Replace all occurrences (one) of `addr_of_mut!(place)` with
`&raw mut place`.

This will allow us to reduce macro complexity, and improve consistency
with existing reference syntax as `&raw mut` is similar to `&mut` making
it fit more naturally with other existing code.

Suggested-by: Benno Lossin <benno.lossin@proton.me>
Link: https://github.com/Rust-for-Linux/linux/issues/1148
Signed-off-by: Antonio Hickey <contact@antoniohickey.com>
Acked-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20250320020740.1631171-17-contact@antoniohickey.com
[ Reworded slightly. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-23 20:39:37 +01:00
Antonio Hickey
e1dfaa33fd rust: enable raw_ref_op feature 
Since Rust 1.82.0 the `raw_ref_op` feature is stable [1].

By enabling this feature we can use `&raw const place` and
`&raw mut place` instead of using `addr_of!(place)` and
`addr_of_mut!(place)` macros.

Allowing us to reduce macro complexity, and improve consistency
with existing reference syntax as `&raw const`, `&raw mut` are
similar to `&`, `&mut` making it fit more naturally with other
existing code.

Suggested-by: Benno Lossin <benno.lossin@proton.me>
Link: https://github.com/Rust-for-Linux/linux/issues/1148
Link: https://blog.rust-lang.org/2024/10/17/Rust-1.82.0.html#native-syntax-for-creating-a-raw-pointer [1]
Signed-off-by: Antonio Hickey <contact@antoniohickey.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Tamir Duberstein <tamird@gmail.com>
Link: https://lore.kernel.org/r/20250320020740.1631171-2-contact@antoniohickey.com
[ Removed dashed line change as discussed. Added Link to the explanation
  of the feature in the Rust 1.82.0 release blog post. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-23 19:56:45 +01:00
Tamir Duberstein
4e72a62e8d rust: uaccess: name the correct function 
Correctly refer to `reserve` rather than `try_reserve` in a comment.  This
comment has been incorrect since inception in commit 1b580e7b9ba2 ("rust:
uaccess: add userspace pointers").

Fixes: 1b580e7b9ba2 ("rust: uaccess: add userspace pointers")
Signed-off-by: Tamir Duberstein <tamird@gmail.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Charalampos Mitrodimas <charmitro@posteo.net>
Link: https://lore.kernel.org/r/20250317-uaccess-typo-reserve-v1-1-bbfcb45121f3@gmail.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-23 19:45:03 +01:00
Charalampos Mitrodimas
f6be7af445 rust: rbtree: fix comments referring to Box instead of KBox 
Several safety comments in the RBTree implementation still refer to
"Box::from_raw" and "Box::into_raw", but the code actually uses KBox.
These comments were not updated when the implementation transitioned
from using Box to KBox.

Fixes: 8373147ce496 ("rust: treewide: switch to our kernel `Box` type")
Signed-off-by: Charalampos Mitrodimas <charmitro@posteo.net>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20250315-rbtree-comment-fixes-v1-1-51f72c420ff0@posteo.net
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-23 19:43:02 +01:00
Miguel Ojeda
2c8725c1dc rust: kbuild: skip --remap-path-prefix for rustdoc 
`rustdoc` only recognizes `--remap-path-prefix` starting with
Rust 1.81.0, which is later than on minimum, so we cannot pass it
unconditionally. Otherwise, we get:

    error: Unrecognized option: 'remap-path-prefix'

Note that `rustc` (the compiler) does recognize the flag since a long
time ago (1.26.0).

Moreover, `rustdoc` since Rust 1.82.0 ICEs in out-of-tree builds when
using `--remap-path-prefix`. The issue has been reduced and reported
upstream [1].

Thus workaround both issues by simply skipping the flag when generating
the docs -- it is not critical there anyway.

The ICE does not reproduce under `--test`, but we still need to skip
the flag as well for `RUSTDOC TK` since it is not recognized.

Fixes: dbdffaf50ff9 ("kbuild, rust: use -fremap-path-prefix to make paths relative")
Link: https://github.com/rust-lang/rust/issues/138520 [1]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Tamir Duberstein <tamird@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-23 00:56:13 +09:00
Andreas Hindborg
aa33de03a3 rust: hrtimer: add clocksource selection through ClockId 
Allow selecting a clock source for timers by passing a `ClockId`
variant to `HrTimer::new`.

Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250309-hrtimer-v3-v6-12-rc2-v12-12-73586e2bd5f1@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
 2025-03-22 12:08:54 +01:00
Andreas Hindborg
bfa3a410bf rust: hrtimer: add HrTimerMode 
Allow selection of timer mode by passing a `HrTimerMode` variant to
`HrTimer::new`.

Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250309-hrtimer-v3-v6-12-rc2-v12-11-73586e2bd5f1@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
 2025-03-22 12:08:54 +01:00
Andreas Hindborg
374b60a013 rust: hrtimer: implement HrTimerPointer for Pin<Box<T>> 
Allow `Pin<Box<T>>` to be the target of a timer callback.

Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250309-hrtimer-v3-v6-12-rc2-v12-10-73586e2bd5f1@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
 2025-03-22 12:08:54 +01:00
Andreas Hindborg
b4fecceee2 rust: alloc: add Box::into_pin 
Add an associated function to convert a `Box<T>` into a `Pin<Box<T>>`.

Acked-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20250309-hrtimer-v3-v6-12-rc2-v12-9-73586e2bd5f1@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
 2025-03-22 12:08:54 +01:00
Andreas Hindborg
042b0c7947 rust: hrtimer: implement UnsafeHrTimerPointer for Pin<&mut T> 
Allow pinned mutable references to structs that contain a `HrTimer` node to
be scheduled with the `hrtimer` subsystem.

Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250309-hrtimer-v3-v6-12-rc2-v12-8-73586e2bd5f1@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
 2025-03-22 12:08:54 +01:00
Andreas Hindborg
582523d9de rust: hrtimer: implement UnsafeHrTimerPointer for Pin<&T> 
Allow pinned references to structs that contain a `HrTimer` node to be
scheduled with the `hrtimer` subsystem.

Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250309-hrtimer-v3-v6-12-rc2-v12-7-73586e2bd5f1@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
 2025-03-22 12:08:54 +01:00
Andreas Hindborg
f93b0d8360 rust: hrtimer: add hrtimer::ScopedHrTimerPointer 
Add the trait `ScopedHrTimerPointer` to allow safe use of stack allocated
timers. Safety is achieved by pinning the stack in place while timers are
running.

Implement the trait for all types that implement `UnsafeHrTimerPointer`.

Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20250309-hrtimer-v3-v6-12-rc2-v12-6-73586e2bd5f1@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
 2025-03-22 12:08:54 +01:00
Andreas Hindborg
a6968ce376 rust: hrtimer: add UnsafeHrTimerPointer 
Add a trait to allow unsafely queuing stack allocated timers.

Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20250309-hrtimer-v3-v6-12-rc2-v12-5-73586e2bd5f1@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
 2025-03-22 12:08:54 +01:00
Andreas Hindborg
94e05a66ea rust: hrtimer: allow timer restart from timer handler 
Allow timer handlers to report that they want a timer to be restarted after
the timer handler has finished executing.

Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Tamir Duberstein <tamird@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20250309-hrtimer-v3-v6-12-rc2-v12-4-73586e2bd5f1@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
 2025-03-22 12:08:54 +01:00
Andreas Hindborg
5928642b11 rust: str: implement strip_prefix for BStr 
Implement `strip_prefix` for `BStr` by deferring to `slice::strip_prefix`
on the underlying `&[u8]`.

Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Tested-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
Tested-by: Daniel Gomez <da.gomez@samsung.com>
Link: https://lore.kernel.org/r/20250227-module-params-v3-v8-4-ceeee85d9347@kernel.org
[ Pluralized section name. Hid `use`. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-20 21:44:47 +01:00
Andreas Hindborg
d2e3f7987d rust: str: implement AsRef<BStr> for [u8] and BStr 
Implement `AsRef<BStr>` for `[u8]` and `BStr` so these can be used
interchangeably for operations on `BStr`.

Reviewed-by: Gary Guo <gary@garyguo.net>
Tested-by: Daniel Almeida <daniel.almeida@collabora.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Fiona Behrens <me@kloenk.dev>
Tested-by: Daniel Gomez <da.gomez@samsung.com>
Link: https://lore.kernel.org/r/20250227-module-params-v3-v8-3-ceeee85d9347@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-20 21:44:47 +01:00
Andreas Hindborg
50a5ff0a95 rust: str: implement Index for BStr 
The `Index` implementation on `BStr` was lost when we switched `BStr` from
a type alias of `[u8]` to a newtype. Add back `Index` by implementing
`Index` for `BStr` when `Index` would be implemented for `[u8]`.

Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Tested-by: Daniel Almeida <daniel.almeida@collabora.com>
Reviewed-by: Fiona Behrens <me@kloenk.dev>
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Tested-by: Daniel Gomez <da.gomez@samsung.com>
Link: https://lore.kernel.org/r/20250227-module-params-v3-v8-2-ceeee85d9347@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-20 21:44:47 +01:00
Andreas Hindborg
3eff946dfe rust: str: implement PartialEq for BStr 
Implement `PartialEq` for `BStr` by comparing underlying byte slices.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Tested-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Fiona Behrens <me@kloenk.dev>
Tested-by: Daniel Gomez <da.gomez@samsung.com>
Link: https://lore.kernel.org/r/20250227-module-params-v3-v8-1-ceeee85d9347@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-20 21:44:47 +01:00
Abdiel Janulgue
ad2907b4e3 rust: add dma coherent allocator abstraction 
Add a simple dma coherent allocator rust abstraction. Based on
Andreas Hindborg's dma abstractions from the rnvme driver, which
was also based on earlier work by Wedson Almeida Filho.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@gmail.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20250317185345.2608976-3-abdiel.janulgue@gmail.com
Nacked-by: Christoph Hellwig <hch@lst.de>
[ Removed period. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-20 21:44:46 +01:00
Abdiel Janulgue
e385e94a8b rust: error: Add EOVERFLOW 
Trivial addition for missing EOVERFLOW error. This is used by a
subsequent patch that might require returning EOVERFLOW as a result
of `checked_mul`.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@gmail.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20250317185345.2608976-2-abdiel.janulgue@gmail.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-20 21:44:46 +01:00
Danilo Krummrich
51d0de7596 rust: platform: require Send for Driver trait implementers 
The instance of Self, returned and created by Driver::probe() is
dropped in the bus' remove() callback.

Request implementers of the Driver trait to implement Send, since the
remove() callback is not guaranteed to run from the same thread as
probe().

Fixes: 683a63befc73 ("rust: platform: add basic platform device / driver abstractions")
Cc: stable <stable@kernel.org>
Reported-by: Alice Ryhl <aliceryhl@google.com>
Closes: https://lore.kernel.org/lkml/Z9rDxOJ2V2bPjj5i@google.com/
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250319145350.69543-2-dakr@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2025-03-20 07:41:11 -07:00
Danilo Krummrich
935e1d90bf rust: pci: require Send for Driver trait implementers 
The instance of Self, returned and created by Driver::probe() is
dropped in the bus' remove() callback.

Request implementers of the Driver trait to implement Send, since the
remove() callback is not guaranteed to run from the same thread as
probe().

Fixes: 1bd8b6b2c5d3 ("rust: pci: add basic PCI device / driver abstractions")
Cc: stable <stable@kernel.org>
Reported-by: Alice Ryhl <aliceryhl@google.com>
Closes: https://lore.kernel.org/lkml/Z9rDxOJ2V2bPjj5i@google.com/
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250319145350.69543-1-dakr@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2025-03-20 07:41:07 -07:00
José Expósito
100af58c8d rust: kunit: allow to know if we are in a test 
In some cases, we need to call test-only code from outside the test
case, for example, to mock a function or a module.

In order to check whether we are in a test or not, we need to test if
`CONFIG_KUNIT` is set.
Unfortunately, we cannot rely only on this condition because:
- a test could be running in another thread,
- some distros compile KUnit in production kernels, so checking at runtime
  that `current->kunit_test != NULL` is required.

Forturately, KUnit provides an optimised check in
`kunit_get_current_test()`, which checks CONFIG_KUNIT, a global static
key, and then the current thread's running KUnit test.

Add a safe wrapper function around this to know whether or not we are in
a KUnit test and examples showing how to mock a function and a module.

Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Co-developed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Co-developed-by: David Gow <davidgow@google.com>
Signed-off-by: David Gow <davidgow@google.com>
Link: https://lore.kernel.org/r/20250307090103.918788-4-davidgow@google.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-20 12:27:05 +01:00