rust: add PL011 device model

This commit adds a re-implementation of hw/char/pl011.c in Rust.

How to build:

1. Configure a QEMU build with:
   --enable-system --target-list=aarch64-softmmu --enable-rust
2. Launching a VM with qemu-system-aarch64 should use the Rust version
   of the pl011 device

Co-authored-by: Junjie Mao <junjie.mao@intel.com>
Co-authored-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20241024-rust-round-2-v1-2-051e7a25b978@linaro.org

1 files changed, 26 insertions, 0 deletions

diff --git a/rust/hw/char/pl011/meson.build b/rust/hw/char/pl011/meson.build
new file mode 100644
index 0000000000..547cca5a96
--- /dev/null
+++ b/rust/hw/char/pl011/meson.build
@@ -0,0 +1,26 @@
+subproject('bilge-0.2-rs', required: true)
+subproject('bilge-impl-0.2-rs', required: true)
+
+bilge_dep = dependency('bilge-0.2-rs')
+bilge_impl_dep = dependency('bilge-impl-0.2-rs')
+
+_libpl011_rs = static_library(
+  'pl011',
+  files('src/lib.rs'),
+  override_options: ['rust_std=2021', 'build.rust_std=2021'],
+  rust_abi: 'rust',
+  dependencies: [
+    bilge_dep,
+    bilge_impl_dep,
+    qemu_api,
+    qemu_api_macros,
+  ],
+)
+
+rust_devices_ss.add(when: 'CONFIG_X_PL011_RUST', if_true: [declare_dependency(
+  link_whole: [_libpl011_rs],
+  # Putting proc macro crates in `dependencies` is necessary for Meson to find
+  # them when compiling the root per-target static rust lib.
+  dependencies: [bilge_impl_dep, qemu_api_macros],
+  variables: {'crate': 'pl011'},
+)])