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* qom: Use command line syntax for default values in help

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* i386: support cache topology with machine's configuration
 * rust: fix duplicate symbols from monitor-fd.c
 * rust: add module to convert between success/-errno and io::Result
 * rust: move class_init implementation from trait to method
 * pvg: configuration improvements
 * kvm guestmemfd: replace assertion with error
 * riscv: cleanups
 * target/i386/hvf: cleanups to emulation
 * target/i386: add Zhaoxin and Yongfeng CPU model
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Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* qom: Use command line syntax for default values in help
* i386: support cache topology with machine's configuration
* rust: fix duplicate symbols from monitor-fd.c
* rust: add module to convert between success/-errno and io::Result
* rust: move class_init implementation from trait to method
* pvg: configuration improvements
* kvm guestmemfd: replace assertion with error
* riscv: cleanups
* target/i386/hvf: cleanups to emulation
* target/i386: add Zhaoxin and Yongfeng CPU model

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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (34 commits)
  target/i386: Mask CMPLegacy bit in CPUID[0x80000001].ECX for Zhaoxin CPUs
  target/i386: Introduce Zhaoxin Yongfeng CPU model
  target/i386: Add CPUID leaf 0xC000_0001 EDX definitions
  target/i386: Add support for Zhaoxin CPU vendor identification
  target/riscv: move 128-bit check to TCG realize
  target/riscv: remove unused macro DEFINE_CPU
  i386/cpu: add has_caches flag to check smp_cache configuration
  i386/pc: Support cache topology in -machine for PC machine
  i386/cpu: Update cache topology with machine's configuration
  i386/cpu: Support module level cache topology
  rust: qom: get rid of ClassInitImpl
  rust: pl011, qemu_api tests: do not use ClassInitImpl
  rust: qom: add ObjectImpl::CLASS_INIT
  rust: add SysBusDeviceImpl
  rust: add IsA bounds to QOM implementation traits
  target/i386/hvf: drop some dead code
  target/i386/hvf: move and rename simulate_{rdmsr, wrmsr}
  target/i386/hvf: move and rename {load, store}_regs
  target/i386/hvf: use x86_segment in x86_decode.c
  target/i386/hvf: fix the declaration of hvf_handle_io
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2025-03-03 10:20:59 +08:00
commit 8d56d0fd2f
53 changed files with 1275 additions and 579 deletions
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19
docs/devel/rust.rst
View file

@ -139,16 +139,22 @@ anymore.
Writing Rust code in QEMU
-------------------------
Right now QEMU includes three crates:
QEMU includes four crates:
* ``qemu_api`` for bindings to C code and useful functionality
* ``qemu_api_macros`` defines several procedural macros that are useful when
writing C code
* ``pl011`` (under ``rust/hw/char/pl011``) is the sample device that is being
used to further develop ``qemu_api`` and ``qemu_api_macros``. It is a functional
replacement for the ``hw/char/pl011.c`` file.
* ``pl011`` (under ``rust/hw/char/pl011``) and ``hpet`` (under ``rust/hw/timer/hpet``)
are sample devices that demonstrate ``qemu_api`` and ``qemu_api_macros``, and are
used to further develop them. These two crates are functional\ [#issues]_ replacements
for the ``hw/char/pl011.c`` and ``hw/timer/hpet.c`` files.
.. [#issues] The ``pl011`` crate is synchronized with ``hw/char/pl011.c``
as of commit 02b1f7f61928. The ``hpet`` crate is synchronized as of
commit f32352ff9e. Both are lacking tracing functionality; ``hpet``
is also lacking support for migration.
This section explains how to work with them.
@ -179,6 +185,7 @@ module status
``callbacks`` complete
``cell`` stable
``c_str`` complete
``errno`` complete
``irq`` complete
``memory`` stable
``module`` complete
@ -293,7 +300,7 @@ to a Rust mutable reference, and use a shared reference instead. Rust code
will then have to use QEMU's ``BqlRefCell`` and ``BqlCell`` type, which
enforce that locking rules for the "Big QEMU Lock" are respected. These cell
types are also known to the ``vmstate`` crate, which is able to "look inside"
them when building an in-memory representation of a ``struct``s layout.
them when building an in-memory representation of a ``struct``'s layout.
Note that the same is not true of a ``RefCell`` or ``Mutex``.
In the future, similar cell types might also be provided for ``AioContext``-based
@ -349,7 +356,7 @@ Writing procedural macros
'''''''''''''''''''''''''
By conventions, procedural macros are split in two functions, one
returning ``Result<proc_macro2::TokenStream, MacroError>` with the body of
returning ``Result<proc_macro2::TokenStream, MacroError>`` with the body of
the procedural macro, and the second returning ``proc_macro::TokenStream``
which is the actual procedural macro. The former's name is the same as
the latter with the ``_or_error`` suffix. The code for the latter is more