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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 <[email protected]>
Reported-by: Alice Ryhl <[email protected]>
Closes: https://lore.kernel.org/lkml/[email protected]/
Signed-off-by: Danilo Krummrich <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Commit 4d320e30ee04 ("rust: platform: fix unrestricted &mut
platform::Device") changed the definition of platform::Device and
discarded the implicitly derived Send and Sync traits.
This isn't required by upstream code yet, and hence did not cause any
issues. However, it is relied on by upcoming drivers, hence add it back
in.
Signed-off-by: Danilo Krummrich <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Commit 7b948a2af6b5 ("rust: pci: fix unrestricted &mut pci::Device")
changed the definition of pci::Device and discarded the implicitly
derived Send and Sync traits.
This isn't required by upstream code yet, and hence did not cause any
issues. However, it is relied on by upcoming drivers, hence add it back
in.
Signed-off-by: Danilo Krummrich <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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As by now, platform::Device is implemented as:
#[derive(Clone)]
pub struct Device(ARef<device::Device>);
This may be convenient, but has the implication that drivers can call
device methods that require a mutable reference concurrently at any
point of time.
Instead define platform::Device as
pub struct Device<Ctx: DeviceContext = Normal>(
Opaque<bindings::platform_dev>,
PhantomData<Ctx>,
);
and manually implement the AlwaysRefCounted trait.
With this we can implement methods that should only be called from
bus callbacks (such as probe()) for platform::Device<Core>. Consequently,
we make this type accessible in bus callbacks only.
Arbitrary references taken by the driver are still of type
ARef<platform::Device> and hence don't provide access to methods that are
reserved for bus callbacks.
Fixes: 683a63befc73 ("rust: platform: add basic platform device / driver abstractions")
Reviewed-by: Benno Lossin <[email protected]>
Signed-off-by: Danilo Krummrich <[email protected]>
Acked-by: Boqun Feng <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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As by now, pci::Device is implemented as:
#[derive(Clone)]
pub struct Device(ARef<device::Device>);
This may be convenient, but has the implication that drivers can call
device methods that require a mutable reference concurrently at any
point of time.
Instead define pci::Device as
pub struct Device<Ctx: DeviceContext = Normal>(
Opaque<bindings::pci_dev>,
PhantomData<Ctx>,
);
and manually implement the AlwaysRefCounted trait.
With this we can implement methods that should only be called from
bus callbacks (such as probe()) for pci::Device<Core>. Consequently, we
make this type accessible in bus callbacks only.
Arbitrary references taken by the driver are still of type
ARef<pci::Device> and hence don't provide access to methods that are
reserved for bus callbacks.
Fixes: 1bd8b6b2c5d3 ("rust: pci: add basic PCI device / driver abstractions")
Reviewed-by: Benno Lossin <[email protected]>
Signed-off-by: Danilo Krummrich <[email protected]>
Acked-by: Boqun Feng <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Some bus device functions should only be called from bus callbacks,
such as probe(), remove(), resume(), suspend(), etc.
To ensure this add device context marker structs, that can be used as
generics for bus device implementations.
Reviewed-by: Benno Lossin <[email protected]>
Suggested-by: Benno Lossin <[email protected]>
Signed-off-by: Danilo Krummrich <[email protected]>
Acked-by: Boqun Feng <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Simplify enable_device_mem() by using to_result() to handle the return
value of the corresponding FFI call.
Reviewed-by: Benno Lossin <[email protected]>
Signed-off-by: Danilo Krummrich <[email protected]>
Acked-by: Boqun Feng <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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When building the kernel on Arch Linux using on x86_64 with tools:
$ rustc --version
rustc 1.84.0 (9fc6b4312 2025-01-07)
$ clang --version
clang version 19.1.7
Target: x86_64-pc-linux-gnu
The following symbols are generated:
$ nm vmlinux | rg ' _R' | rustfilt | rg faux
ffffffff81959ae0 T <kernel::faux::Registration>::new
ffffffff81959b40 T <kernel::faux::Registration as core::ops::drop::Drop>::drop
However, these Rust symbols are wrappers around bindings in the C faux
code. Inlining these functions removes the middle-man wrapper function
After applying this patch, the above function signatures disappear.
Link: https://github.com/Rust-for-Linux/linux/issues/1145
Signed-off-by: Ethan Carter Edwards <[email protected]>
Acked-by: Danilo Krummrich <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Link: https://lore.kernel.org/r/jesg4yu7m6fvzmgg5tlsktrrjm36l4qsranto5mdmnucx4pvf3@nhvt4juw5es3
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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A little late in the review of the faux device interface, we added the
ability to specify a parent device when creating new faux devices - but
this never got ported over to the rust bindings. So, let's add the missing
argument now so we don't have to convert other users later down the line.
Signed-off-by: Lyude Paul <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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I think this change got missed during review, we don't need
#[repr(transparent)] since Registration just holds a single NonNull. This
attribute had originally been added by me when I was still figuring out how
the bindings should look like but got committed by mistake. So, just drop
it.
Signed-off-by: Lyude Paul <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Acked-by: Danilo Krummrich <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Fix doctest of `Devres` which still used `writeb` instead of `write8`.
Fixes: 354fd6e86fac ("rust: io: rename `io::Io` accessors")
Signed-off-by: Fiona Behrens <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Rename the I/O accessors provided by `Io` to encode the type as
number instead of letter. This is in preparation for Port I/O support
to use a trait for generic accessors.
Add a `c_fn` argument to the accessor generation macro to translate
between rust and C names.
Suggested-by: Danilo Krummrich <[email protected]>
Link: https://rust-for-linux.zulipchat.com/#narrow/channel/288089-General/topic/PIO.20support/near/499460541
Signed-off-by: Fiona Behrens <[email protected]>
Acked-by: Danilo Krummrich <[email protected]>
Acked-by: Daniel Almeida <[email protected]>
Reviewed-by: Greg Kroah-Hartman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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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`
...
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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
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Allow selecting a clock source for timers by passing a `ClockId`
variant to `HrTimer::new`.
Acked-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Allow selection of timer mode by passing a `HrTimerMode` variant to
`HrTimer::new`.
Acked-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Allow `Pin<Box<T>>` to be the target of a timer callback.
Acked-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Add an associated function to convert a `Box<T>` into a `Pin<Box<T>>`.
Acked-by: Danilo Krummrich <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Allow pinned mutable references to structs that contain a `HrTimer` node to
be scheduled with the `hrtimer` subsystem.
Acked-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Allow pinned references to structs that contain a `HrTimer` node to be
scheduled with the `hrtimer` subsystem.
Acked-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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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 <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Add a trait to allow unsafely queuing stack allocated timers.
Acked-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Allow timer handlers to report that they want a timer to be restarted after
the timer handler has finished executing.
Acked-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Tamir Duberstein <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Allow the use of intrusive `hrtimer` fields in structs that are managed by
an `Arc` by implementing `HrTimerPointer` and `RawTimerCallbck` for `Arc`.
Acked-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Add a method to get a pointer to the data contained in an `Arc`.
Reviewed-by: Lyude Paul <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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Add support for intrusive use of the hrtimer system. For now,
only add support for embedding one timer per Rust struct.
The hrtimer Rust API is based on the intrusive style pattern introduced by
the Rust workqueue API.
Acked-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Tamir Duberstein <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
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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 <[email protected]>
Closes: https://lore.kernel.org/linux-next/[email protected]/ [1]
Signed-off-by: Danilo Krummrich <[email protected]>
Reviewed-by: Boqun Feng <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Added number to Closes. Fix typo spotted by Boqun. - Miguel ]
Signed-off-by: Miguel Ojeda <[email protected]>
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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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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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 <[email protected]>
Link: https://github.com/Rust-for-Linux/linux/issues/1148
Signed-off-by: Antonio Hickey <[email protected]>
Acked-by: Andreas Hindborg <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Boqun Feng <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Reworded slightly. - Miguel ]
Signed-off-by: Miguel Ojeda <[email protected]>
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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 <[email protected]>
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 <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Reviewed-by: Tamir Duberstein <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ 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 <[email protected]>
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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 <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Charalampos Mitrodimas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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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 <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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Implement `strip_prefix` for `BStr` by deferring to `slice::strip_prefix`
on the underlying `&[u8]`.
Reviewed-by: Gary Guo <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Reviewed-by: Daniel Almeida <[email protected]>
Tested-by: Daniel Almeida <[email protected]>
Signed-off-by: Andreas Hindborg <[email protected]>
Tested-by: Daniel Gomez <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Pluralized section name. Hid `use`. - Miguel ]
Signed-off-by: Miguel Ojeda <[email protected]>
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Implement `AsRef<BStr>` for `[u8]` and `BStr` so these can be used
interchangeably for operations on `BStr`.
Reviewed-by: Gary Guo <[email protected]>
Tested-by: Daniel Almeida <[email protected]>
Reviewed-by: Daniel Almeida <[email protected]>
Signed-off-by: Andreas Hindborg <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Tested-by: Daniel Gomez <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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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 <[email protected]>
Tested-by: Daniel Almeida <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Signed-off-by: Andreas Hindborg <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Tested-by: Daniel Gomez <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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Implement `PartialEq` for `BStr` by comparing underlying byte slices.
Reviewed-by: Alice Ryhl <[email protected]>
Reviewed-by: Gary Guo <[email protected]>
Reviewed-by: Daniel Almeida <[email protected]>
Tested-by: Daniel Almeida <[email protected]>
Signed-off-by: Andreas Hindborg <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Tested-by: Daniel Gomez <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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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 <[email protected]>
Signed-off-by: Abdiel Janulgue <[email protected]>
Acked-by: Danilo Krummrich <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Nacked-by: Christoph Hellwig <[email protected]>
[ Removed period. - Miguel ]
Signed-off-by: Miguel Ojeda <[email protected]>
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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 <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Signed-off-by: Abdiel Janulgue <[email protected]>
Acked-by: Danilo Krummrich <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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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 <[email protected]>
Co-developed-by: Miguel Ojeda <[email protected]>
Signed-off-by: Miguel Ojeda <[email protected]>
Co-developed-by: David Gow <[email protected]>
Signed-off-by: David Gow <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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Add a new procedural macro (`#[kunit_tests(kunit_test_suit_name)]`) to
run KUnit tests using a user-space like syntax.
The macro, that should be used on modules, transforms every `#[test]`
in a `kunit_case!` and adds a `kunit_unsafe_test_suite!` registering
all of them.
The only difference with user-space tests is that instead of using
`#[cfg(test)]`, `#[kunit_tests(kunit_test_suit_name)]` is used.
Note that `#[cfg(CONFIG_KUNIT)]` is added so the test module is not
compiled when `CONFIG_KUNIT` is set to `n`.
Reviewed-by: David Gow <[email protected]>
Signed-off-by: José Expósito <[email protected]>
Co-developed-by: Boqun Feng <[email protected]>
Signed-off-by: Boqun Feng <[email protected]>
Co-developed-by: Miguel Ojeda <[email protected]>
Signed-off-by: Miguel Ojeda <[email protected]>
Reviewed-by: Tamir Duberstein <[email protected]>
Signed-off-by: David Gow <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Removed spurious (in rendered form) newline in docs. - Miguel ]
Signed-off-by: Miguel Ojeda <[email protected]>
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Add a couple of Rust const functions and macros to allow to develop
KUnit tests without relying on generated C code:
- The `kunit_unsafe_test_suite!` Rust macro is similar to the
`kunit_test_suite` C macro. It requires a NULL-terminated array of
test cases (see below).
- The `kunit_case` Rust function is similar to the `KUNIT_CASE` C macro.
It generates as case from the name and function.
- The `kunit_case_null` Rust function generates a NULL test case, which
is to be used as delimiter in `kunit_test_suite!`.
While these functions and macros can be used on their own, a future
patch will introduce another macro to create KUnit tests using a
user-space like syntax.
Signed-off-by: José Expósito <[email protected]>
Co-developed-by: Matt Gilbride <[email protected]>
Signed-off-by: Matt Gilbride <[email protected]>
Co-developed-by: Miguel Ojeda <[email protected]>
Signed-off-by: Miguel Ojeda <[email protected]>
Co-developed-by: David Gow <[email protected]>
Signed-off-by: David Gow <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Applied Markdown in comment. - Miguel ]
Signed-off-by: Miguel Ojeda <[email protected]>
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The kunitconfig file in a directory is used by kunit.py to enable all
necessary kernel configurations to run the tests in that subdirectory.
Add such a file for rust/.
Signed-off-by: Thomas Weißschuh <[email protected]>
Reviewed-by: David Gow <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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Usermode Linux uses "um" as primary architecture name and the underlying
physical architecture is provided in "SUBARCH".
Resolve the target architecture flags through that underlying
architecture.
This is the same pattern as used by scripts/Makefile.clang from which
the bindgen flags are derived.
[ David says:
(...) this is enough to get Rust-for-Linux working with gcc under
64-bit UML on my system.
- Miguel ]
Signed-off-by: Thomas Weißschuh <[email protected]>
Reviewed-by: David Gow <[email protected]>
Acked-by: Johannes Berg <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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The pin-init crate is now compiled in a standalone fashion, so revert
the earlier commit that disabled the doctests in pin-init in order to
avoid build errors while transitioning the crate into a standalone
version.
Signed-off-by: Benno Lossin <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Tested-by: Andreas Hindborg <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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Add readme and contribution guidelines of the user-space version of
pin-init.
Signed-off-by: Benno Lossin <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Tested-by: Andreas Hindborg <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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Remove the last differences between the kernel version and the
user-space version.
Signed-off-by: Benno Lossin <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Tested-by: Andreas Hindborg <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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Synchronize the internal macros crate with the user-space version that
uses the quote crate [1] instead of a custom `quote!` macro. The imports
in the different version are achieved using `cfg` on the kernel config
value. This cfg is always set in the kernel and never set in the
user-space version.
Since the quote crate requires the proc_macro2 crate, imports also need
to be adjusted and `.into()` calls have to be inserted.
Link: https://crates.io/crates/quote [1]
Signed-off-by: Benno Lossin <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Tested-by: Andreas Hindborg <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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Synchronize documentation and examples with the user-space version.
Signed-off-by: Benno Lossin <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Tested-by: Andreas Hindborg <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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To synchronize the kernel's version of pin-init with the user-space
version, introduce support for `std` and `alloc`. While the kernel uses
neither, the user-space version has to support both. Thus include the
required `#[cfg]`s and additional code.
Signed-off-by: Benno Lossin <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Tested-by: Andreas Hindborg <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Undo the temporary `--extern force:alloc` since now we have contents
for `alloc` here. - Miguel ]
Signed-off-by: Miguel Ojeda <[email protected]>
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Rename relative paths inside of the crate to still refer to the same
items, also rename paths inside of the kernel crate and adjust the build
system to build the crate.
[ Remove the `expect` (and thus the `lint_reasons` feature) since
the tree now uses `quote!` from `rust/macros/export.rs`. Remove the
`TokenStream` import removal, since it is now used as well.
In addition, temporarily (i.e. just for this commit) use an `--extern
force:alloc` to prevent an unknown `new_uninit` error in the `rustdoc`
target. For context, please see a similar case in:
https://lore.kernel.org/lkml/[email protected]/
And adjusted the message above. - Miguel ]
Signed-off-by: Benno Lossin <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Tested-by: Andreas Hindborg <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
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