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* rust: split Rust-only "common" crateMarc-André Lureau2025-09-171-354/+0
| | | | | | | Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Link: https://lore.kernel.org/r/20250827104147.717203-6-marcandre.lureau@redhat.com Reviewed-by: Zhao Liu <zhao1.liu@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* rust: vmstate: convert to use builder patternZhao Liu2025-09-171-1/+10
| | | | | | | | | | | | | | | | Similar to MemoryRegionOps, the builder pattern has two advantages: 1) it makes it possible to build a VMStateDescription that knows which types it will be invoked on; 2) it provides a way to wrap the callbacks and let devices avoid "unsafe". Unfortunately, building a static VMStateDescription requires the builder methods to be "const", and because the VMStateFields are *also* static, this requires const_refs_static. So this requires Rust 1.83.0. Signed-off-by: Zhao Liu <zhao1.liu@intel.com> Link: https://lore.kernel.org/r/20250908105005.2119297-8-pbonzini@redhat.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* rust: add module to convert between success/-errno and io::ResultPaolo Bonzini2025-02-251-0/+345
It is a common convention in QEMU to return a positive value in case of success, and a negated errno value in case of error. Unfortunately, using errno portably in Rust is a bit complicated; on Unix the errno values are supported natively by io::Error, but on Windows they are not; so, use the libc crate. This is a set of utility functions that are used by both chardev and block layer bindings. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>