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* meson: check in main meson.build for native Rust compilerPaolo Bonzini2024-10-141-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | A working native Rust compiler is always needed in order to compile Rust code, even when cross compiling, in order to build the procedural macros that QEMU uses. Right now, the check is done in rust/qemu-api-macros/meson.build, but this has two disadvantages. First, it makes the build fail when the Meson "rust" option is set to "auto" (instead, Rust support should be disabled). Second, add_languages() is one of the few functions that are executed even by "meson introspect", except that "meson introspect" executes both branches of "if" statements! Therefore, "meson introspect" tries to look for a Rust compiler even if the option is disabled---and then fails because the compiler is required by rust/qemu-api-macros/meson.build. This is visible for example if the compilation host has a stale scripts/meson-buildoptions.sh and no rustc installed. Both issues can be fixed by moving the check to the main meson.build, together with the check for the cross compiler. Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* rust: add PL011 device modelPaolo Bonzini2024-10-1115-0/+1543
| | | | | | | | | | | | | | | | | | | 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: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Link: https://lore.kernel.org/r/6ec1d4fb8db2a1d7ba94c73e65d9770371b7857d.1727961605.git.manos.pitsidianakis@linaro.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* rust: add utility procedural macro crateManos Pitsidianakis2024-10-117-0/+145
| | | | | | | | | | | | | | | | | | This commit adds a helper crate library, qemu-api-macros for derive (and other procedural) macros to be used along qemu-api. It needs to be a separate library because in Rust, procedural macros, or macros that can generate arbitrary code, need to be special separate compilation units. Only one macro is introduced in this patch, #[derive(Object)]. It generates a constructor to register a QOM TypeInfo on init and it must be used on types that implement qemu_api::definitions::ObjectImpl trait. Reviewed-by: Junjie Mao <junjie.mao@hotmail.com> Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Link: https://lore.kernel.org/r/dd645642406a6dc2060c6f3f17db2bc77ed67b59.1727961605.git.manos.pitsidianakis@linaro.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* rust: add crate to expose bindings and interfacesManos Pitsidianakis2024-10-1112-0/+535
| | | | | | | | | | | | | | Add rust/qemu-api, which exposes rust-bindgen generated FFI bindings and provides some declaration macros for symbols visible to the rest of QEMU. 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: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Link: https://lore.kernel.org/r/0fb23fbe211761b263aacec03deaf85c0cc39995.1727961605.git.manos.pitsidianakis@linaro.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* rust: add bindgen step as a meson dependencyManos Pitsidianakis2024-10-113-0/+50
| | | | | | | | | | | | | | | | | | Add bindings_rs target for generating rust bindings to target-independent qemu C APIs. The bindings need be created before any rust crate that uses them is compiled. The bindings.rs file will end up in BUILDDIR/bindings.rs and have the same name as a target: ninja bindings.rs Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Link: https://lore.kernel.org/r/1be89a27719049b7203eaf2eca8bbb75b33f18d4.1727961605.git.manos.pitsidianakis@linaro.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* build-sys: Add rust feature optionManos Pitsidianakis2024-10-071-0/+0
Add rust feature in meson.build, configure, to prepare for adding Rust code in the followup commits. Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Link: https://lore.kernel.org/r/14642d80fbccbc60f7aa78b449a7deb5e2784ed9.1727961605.git.manos.pitsidianakis@linaro.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>