[PATCH v7 0/7] Add Rust build support, ARM PL011 device impl

[Manos Pitsidianakis <manos.pitsidianakis@linaro.org>]

Changes
=======

- Incorporated changes by Paolo Bonzini and Junjie Mao as a result of
  discussion on the previous patch series version
- Included two squash patches from
  <20240814090820.1251026-1-junjie.mao@intel.com>
  Junjie Mao (2):
    meson: subprojects: Specify Rust edition by rust_std=20XX
    rust: Specify Rust edition by rust_std=20XX

Outstanding issues
==================

Outstanding issues that are not blocking for merge are:

- Cross-compilation for aarch64 is not possible out-of-the-box because of this bug:
  <https://github.com/rust-lang/rust/issues/125619> in llvm which when
  fixed, must be ported to upstream rust's llvm fork. Since the problem
  is an extraneous symbol we could strip it with objcopy -N|--strip-symbol
- Adding more than one Rust device ends up with duplicate symbols from
  rust std library because we are linking as whole archives because...
  constructors are stripped by the linker otherwise :( It can be worked
  around if a single Rust library is built with all the devices as
  dependencies which is then linked to qemu. The fix is a small change
  which I will add either in a next version or when a new Rust device is
  added.

Previous version was: <rust-pl011-rfc-v6.git.manos.pitsidianakis@linaro.org>

---
Hello everyone,

This series adds:

- build system support for the Rust compiler
- a small Rust library, qemu-api, which includes bindings to QEMU's C
  interface generated with bindgen
- a proof of concept ARM PL011 device implementation in Rust, chosen for
  its low complexity. The device is used in the arm virt machine if qemu
  is compiled with rust enabled (./configure --enable-rust [...])

Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>

---
Manos Pitsidianakis (5):
      build-sys: Add rust feature option
      rust: add bindgen step as a meson dependency
      .gitattributes: add Rust diff and merge attributes
      rust: add crate to expose bindings and interfaces
      rust: add PL011 device model

Paolo Bonzini (2):
      Require meson version 1.5.0
      configure, meson: detect Rust toolchain

 MAINTAINERS                                        |  20 +
 configure                                          |  50 +-
 meson.build                                        |  77 ++-
 rust/wrapper.h                                     |  39 ++
 .gitattributes                                     |   3 +
 Kconfig                                            |   1 +
 Kconfig.host                                       |   3 +
 hw/arm/Kconfig                                     |  33 +-
 meson_options.txt                                  |   3 +
 python/scripts/vendor.py                           |   4 +-
 python/wheels/meson-1.2.3-py3-none-any.whl         | Bin 964928 -> 0 bytes
 python/wheels/meson-1.5.0-py3-none-any.whl         | Bin 0 -> 959846 bytes
 pythondeps.toml                                    |   2 +-
 rust/.gitignore                                    |   3 +
 rust/Kconfig                                       |   1 +
 rust/hw/Kconfig                                    |   2 +
 rust/hw/char/Kconfig                               |   3 +
 rust/hw/char/meson.build                           |   1 +
 rust/hw/char/pl011/.gitignore                      |   2 +
 rust/hw/char/pl011/Cargo.lock                      | 125 +++++
 rust/hw/char/pl011/Cargo.toml                      |  26 +
 rust/hw/char/pl011/README.md                       |  31 ++
 rust/hw/char/pl011/meson.build                     |  21 +
 rust/hw/char/pl011/rustfmt.toml                    |   1 +
 rust/hw/char/pl011/src/definitions.rs              |  26 +
 rust/hw/char/pl011/src/device.rs                   | 586 +++++++++++++++++++++
 rust/hw/char/pl011/src/device_class.rs             |  58 ++
 rust/hw/char/pl011/src/lib.rs                      | 584 ++++++++++++++++++++
 rust/hw/char/pl011/src/memory_ops.rs               |  56 ++
 rust/hw/meson.build                                |   1 +
 rust/meson.build                                   |  11 +
 rust/qemu-api/.gitignore                           |   2 +
 rust/qemu-api/Cargo.lock                           |   7 +
 rust/qemu-api/Cargo.toml                           |  23 +
 rust/qemu-api/README.md                            |  17 +
 rust/qemu-api/build.rs                             |  13 +
 rust/qemu-api/meson.build                          |  17 +
 rust/qemu-api/rustfmt.toml                         |   1 +
 rust/qemu-api/src/bindings.rs                      |   7 +
 rust/qemu-api/src/definitions.rs                   | 108 ++++
 rust/qemu-api/src/device_class.rs                  | 128 +++++
 rust/qemu-api/src/lib.rs                           | 100 ++++
 rust/qemu-api/src/tests.rs                         |  48 ++
 rust/rustfmt.toml                                  |   7 +
 scripts/archive-source.sh                          |   5 +-
 scripts/make-release                               |   5 +-
 scripts/meson-buildoptions.sh                      |   3 +
 scripts/rustc_args.py                              |  84 +++
 subprojects/.gitignore                             |  11 +
 subprojects/arbitrary-int-1-rs.wrap                |   7 +
 subprojects/bilge-0.2-rs.wrap                      |   7 +
 subprojects/bilge-impl-0.2-rs.wrap                 |   7 +
 subprojects/either-1-rs.wrap                       |   7 +
 subprojects/itertools-0.11-rs.wrap                 |   7 +
 .../packagefiles/arbitrary-int-1-rs/meson.build    |  19 +
 subprojects/packagefiles/bilge-0.2-rs/meson.build  |  29 +
 .../packagefiles/bilge-impl-0.2-rs/meson.build     |  45 ++
 subprojects/packagefiles/either-1-rs/meson.build   |  24 +
 .../packagefiles/itertools-0.11-rs/meson.build     |  30 ++
 .../packagefiles/proc-macro-error-1-rs/meson.build |  40 ++
 .../proc-macro-error-attr-1-rs/meson.build         |  32 ++
 .../packagefiles/proc-macro2-1-rs/meson.build      |  31 ++
 subprojects/packagefiles/quote-1-rs/meson.build    |  29 +
 subprojects/packagefiles/syn-2-rs/meson.build      |  40 ++
 .../packagefiles/unicode-ident-1-rs/meson.build    |  20 +
 subprojects/proc-macro-error-1-rs.wrap             |   7 +
 subprojects/proc-macro-error-attr-1-rs.wrap        |   7 +
 subprojects/proc-macro2-1-rs.wrap                  |   7 +
 subprojects/quote-1-rs.wrap                        |   7 +
 subprojects/syn-2-rs.wrap                          |   7 +
 subprojects/unicode-ident-1-rs.wrap                |   7 +
 tests/lcitool/mappings.yml                         |   2 +-
 72 files changed, 2756 insertions(+), 21 deletions(-)
---
base-commit: a733f37aef3b7d1d33bfe2716af88cdfd67ba64e
change-id: 20240814-rust-pl011-v7

Best regards,
--
γαῖα πυρί μιχθήτω