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Tue, 26 Aug 2025 07:44:05 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHuylGEo7R+xZfV7dFO4Y6RyceQmNoUKaPGrYjxc73gZoY/7WyjH59KZaMz6NCqM2TBX/C6eQ== X-Received: by 2002:a05:6000:438a:b0:3c9:aa54:d119 with SMTP id ffacd0b85a97d-3c9aa54de3dmr5794291f8f.57.1756219445386; Tue, 26 Aug 2025 07:44:05 -0700 (PDT) Received: from [192.168.178.61] ([151.36.40.144]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-3cc4b102889sm62435f8f.51.2025.08.26.07.44.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 26 Aug 2025 07:44:04 -0700 (PDT) Message-ID: Date: Tue, 26 Aug 2025 16:44:03 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC 00/18] rust: split qemu-api To: marcandre.lureau@redhat.com, qemu-devel@nongnu.org Cc: =?UTF-8?Q?Daniel_P=2E_Berrang=C3=A9?= , qemu-rust@nongnu.org, =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= , Manos Pitsidianakis References: <20250826140449.4190022-1-marcandre.lureau@redhat.com> From: Paolo Bonzini Content-Language: en-US Autocrypt: addr=pbonzini@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 8/26/25 16:04, marcandre.lureau@redhat.com wrote: > From: Marc-André Lureau > > Hi, > > qemu-api is providing bindings for various internal libraries. Instead, the > bindings requirements should match the various libraries and use the minimal set > of dependencies. > > An initial Rust-only "common" crate is introduced, then "util" (for libqemuutil, > without bql), "migration" (so it doesn't depend on bql), "bql", "qom" (arguably, > bql shouldn't be required?), and "chardev", "system", "hwcore". Finally the > qemu-api crates are renamed and repurposed. > > This involves a lot of code churn, so hopefully it can be reviewed and merged > early and iterated upon :) The one comment that I would like to handle before merging, is that I'd prefer to keep the preludes and, in fact, even add more exports to them since they can now be chosen per-crate. Ideally, many of the crates you've crated would be accessed through many "use xyz::prelude::*" statements. Also, if I understood correctly the split util/errno.rs can move to common/. While it has a dependency on libc, it doesn't need bindgen. There's a bunch of code duplication for the various bindings.rs and build.rs files, which is not ideal but shouldn't grow much more than this. I wonder if, later, common code across build.rs could be written just once by adding a new crate (e.g. "qemu_meson") to the workspace, that can be used as a build-dependency. Paolo > Marc-André Lureau (18): > rust: remove unused global qemu "allocator" > rust: add workspace authors > rust: split Rust-only "common" crate > rust: split "util" crate > rust: move vmstate_clock!() to qdev module > rust: move VMState handling to QOM module > rust: move Cell vmstate impl > rust: split "migration" crate > rust: split "bql" crate > rust: split "qom" crate > rust: split "chardev" crate > rust: split "system" crate > rust: split "hwcore" crate > rust: rename qemu_api_macros -> qemu_macros > rust/hpet: drop now unneeded qemu_api dep > rust/pl011: drop dependency on qemu_api > rust: repurpose qemu_api -> tests > docs: update rust.rst > > MAINTAINERS | 12 +- > docs/devel/rust.rst | 51 +-- > meson.build | 4 - > rust/bql/wrapper.h | 27 ++ > rust/chardev/wrapper.h | 28 ++ > rust/hw/char/pl011/wrapper.h | 51 +++ > rust/hw/core/wrapper.h | 32 ++ > rust/{qemu-api => migration}/wrapper.h | 20 -- > rust/qom/wrapper.h | 27 ++ > rust/system/wrapper.h | 29 ++ > rust/util/wrapper.h | 32 ++ > rust/Cargo.lock | 127 ++++++- > rust/Cargo.toml | 16 +- > rust/bits/Cargo.toml | 2 +- > rust/bits/meson.build | 2 +- > rust/bits/src/lib.rs | 4 +- > rust/{qemu-api => bql}/Cargo.toml | 13 +- > rust/{qemu-api => bql}/build.rs | 2 +- > rust/bql/meson.build | 52 +++ > rust/bql/src/bindings.rs | 25 ++ > rust/{qemu-api => bql}/src/cell.rs | 333 +++--------------- > rust/bql/src/lib.rs | 29 ++ > rust/chardev/Cargo.toml | 24 ++ > rust/chardev/build.rs | 43 +++ > rust/chardev/meson.build | 54 +++ > rust/chardev/src/bindings.rs | 36 ++ > rust/{qemu-api => chardev}/src/chardev.rs | 35 +- > rust/chardev/src/lib.rs | 4 + > rust/common/Cargo.toml | 16 + > rust/common/meson.build | 32 ++ > rust/{qemu-api => common}/src/assertions.rs | 16 +- > rust/{qemu-api => common}/src/bitops.rs | 1 - > rust/{qemu-api => common}/src/callbacks.rs | 12 +- > rust/common/src/lib.rs | 17 + > rust/common/src/opaque.rs | 240 +++++++++++++ > rust/{qemu-api => common}/src/uninit.rs | 2 +- > rust/common/src/zeroable.rs | 18 + > rust/hw/char/pl011/Cargo.toml | 11 +- > rust/hw/char/pl011/build.rs | 43 +++ > rust/hw/char/pl011/meson.build | 39 +- > rust/hw/char/pl011/src/bindings.rs | 27 ++ > rust/hw/char/pl011/src/device.rs | 49 +-- > rust/hw/char/pl011/src/lib.rs | 1 + > rust/hw/char/pl011/src/registers.rs | 4 +- > rust/hw/core/Cargo.toml | 26 ++ > rust/hw/core/build.rs | 43 +++ > rust/{qemu-api => hw/core}/meson.build | 86 ++--- > rust/hw/core/src/bindings.rs | 41 +++ > rust/{qemu-api => hw/core}/src/irq.rs | 18 +- > rust/hw/core/src/lib.rs | 12 + > rust/{qemu-api => hw/core}/src/qdev.rs | 81 +++-- > rust/{qemu-api => hw/core}/src/sysbus.rs | 28 +- > rust/{qemu-api => hw/core}/tests/tests.rs | 29 +- > rust/hw/timer/hpet/Cargo.toml | 10 +- > rust/hw/timer/hpet/meson.build | 12 +- > rust/hw/timer/hpet/src/device.rs | 56 ++- > rust/hw/timer/hpet/src/fw_cfg.rs | 6 +- > rust/meson.build | 12 +- > rust/migration/Cargo.toml | 21 ++ > rust/migration/build.rs | 43 +++ > rust/migration/meson.build | 57 +++ > rust/migration/src/bindings.rs | 48 +++ > rust/migration/src/lib.rs | 4 + > rust/{qemu-api => migration}/src/vmstate.rs | 166 ++++----- > rust/qemu-api/.gitignore | 2 - > rust/qemu-api/README.md | 19 - > rust/qemu-api/src/lib.rs | 170 --------- > rust/qemu-api/src/prelude.rs | 31 -- > rust/qemu-api/src/zeroable.rs | 37 -- > .../Cargo.toml | 2 +- > .../meson.build | 10 +- > .../src/bits.rs | 0 > .../src/lib.rs | 20 +- > .../src/tests.rs | 8 +- > rust/qom/Cargo.toml | 23 ++ > rust/qom/build.rs | 43 +++ > rust/qom/meson.build | 61 ++++ > rust/qom/src/bindings.rs | 25 ++ > rust/qom/src/lib.rs | 4 + > rust/{qemu-api => qom}/src/qom.rs | 27 +- > rust/qom/tests/tests.rs | 47 +++ > rust/system/Cargo.toml | 22 ++ > rust/system/build.rs | 43 +++ > rust/system/meson.build | 57 +++ > rust/{qemu-api => system}/src/bindings.rs | 33 +- > rust/system/src/lib.rs | 4 + > rust/{qemu-api => system}/src/memory.rs | 20 +- > rust/tests/Cargo.toml | 30 ++ > rust/tests/meson.build | 14 + > .../tests/vmstate_tests.rs | 18 +- > rust/util/Cargo.toml | 23 ++ > rust/util/build.rs | 43 +++ > rust/util/meson.build | 61 ++++ > rust/util/src/bindings.rs | 25 ++ > rust/{qemu-api => util}/src/errno.rs | 11 +- > rust/{qemu-api => util}/src/error.rs | 6 +- > rust/util/src/lib.rs | 10 + > rust/{qemu-api => util}/src/log.rs | 12 +- > rust/{qemu-api => util}/src/module.rs | 2 +- > rust/{qemu-api => util}/src/timer.rs | 12 +- > 100 files changed, 2372 insertions(+), 1044 deletions(-) > create mode 100644 rust/bql/wrapper.h > create mode 100644 rust/chardev/wrapper.h > create mode 100644 rust/hw/char/pl011/wrapper.h > create mode 100644 rust/hw/core/wrapper.h > rename rust/{qemu-api => migration}/wrapper.h (77%) > create mode 100644 rust/qom/wrapper.h > create mode 100644 rust/system/wrapper.h > create mode 100644 rust/util/wrapper.h > rename rust/{qemu-api => bql}/Cargo.toml (52%) > rename rust/{qemu-api => bql}/build.rs (96%) > create mode 100644 rust/bql/meson.build > create mode 100644 rust/bql/src/bindings.rs > rename rust/{qemu-api => bql}/src/cell.rs (70%) > create mode 100644 rust/bql/src/lib.rs > create mode 100644 rust/chardev/Cargo.toml > create mode 100644 rust/chardev/build.rs > create mode 100644 rust/chardev/meson.build > create mode 100644 rust/chardev/src/bindings.rs > rename rust/{qemu-api => chardev}/src/chardev.rs (91%) > create mode 100644 rust/chardev/src/lib.rs > create mode 100644 rust/common/Cargo.toml > create mode 100644 rust/common/meson.build > rename rust/{qemu-api => common}/src/assertions.rs (92%) > rename rust/{qemu-api => common}/src/bitops.rs (98%) > rename rust/{qemu-api => common}/src/callbacks.rs (97%) > create mode 100644 rust/common/src/lib.rs > create mode 100644 rust/common/src/opaque.rs > rename rust/{qemu-api => common}/src/uninit.rs (98%) > create mode 100644 rust/common/src/zeroable.rs > create mode 100644 rust/hw/char/pl011/build.rs > create mode 100644 rust/hw/char/pl011/src/bindings.rs > create mode 100644 rust/hw/core/Cargo.toml > create mode 100644 rust/hw/core/build.rs > rename rust/{qemu-api => hw/core}/meson.build (52%) > create mode 100644 rust/hw/core/src/bindings.rs > rename rust/{qemu-api => hw/core}/src/irq.rs (92%) > create mode 100644 rust/hw/core/src/lib.rs > rename rust/{qemu-api => hw/core}/src/qdev.rs (86%) > rename rust/{qemu-api => hw/core}/src/sysbus.rs (87%) > rename rust/{qemu-api => hw/core}/tests/tests.rs (88%) > create mode 100644 rust/migration/Cargo.toml > create mode 100644 rust/migration/build.rs > create mode 100644 rust/migration/meson.build > create mode 100644 rust/migration/src/bindings.rs > create mode 100644 rust/migration/src/lib.rs > rename rust/{qemu-api => migration}/src/vmstate.rs (80%) > delete mode 100644 rust/qemu-api/.gitignore > delete mode 100644 rust/qemu-api/README.md > delete mode 100644 rust/qemu-api/src/lib.rs > delete mode 100644 rust/qemu-api/src/prelude.rs > delete mode 100644 rust/qemu-api/src/zeroable.rs > rename rust/{qemu-api-macros => qemu-macros}/Cargo.toml (94%) > rename rust/{qemu-api-macros => qemu-macros}/meson.build (63%) > rename rust/{qemu-api-macros => qemu-macros}/src/bits.rs (100%) > rename rust/{qemu-api-macros => qemu-macros}/src/lib.rs (91%) > rename rust/{qemu-api-macros => qemu-macros}/src/tests.rs (93%) > create mode 100644 rust/qom/Cargo.toml > create mode 100644 rust/qom/build.rs > create mode 100644 rust/qom/meson.build > create mode 100644 rust/qom/src/bindings.rs > create mode 100644 rust/qom/src/lib.rs > rename rust/{qemu-api => qom}/src/qom.rs (98%) > create mode 100644 rust/qom/tests/tests.rs > create mode 100644 rust/system/Cargo.toml > create mode 100644 rust/system/build.rs > create mode 100644 rust/system/meson.build > rename rust/{qemu-api => system}/src/bindings.rs (56%) > create mode 100644 rust/system/src/lib.rs > rename rust/{qemu-api => system}/src/memory.rs (95%) > create mode 100644 rust/tests/Cargo.toml > create mode 100644 rust/tests/meson.build > rename rust/{qemu-api => tests}/tests/vmstate_tests.rs (96%) > create mode 100644 rust/util/Cargo.toml > create mode 100644 rust/util/build.rs > create mode 100644 rust/util/meson.build > create mode 100644 rust/util/src/bindings.rs > rename rust/{qemu-api => util}/src/errno.rs (98%) > rename rust/{qemu-api => util}/src/error.rs (98%) > create mode 100644 rust/util/src/lib.rs > rename rust/{qemu-api => util}/src/log.rs (93%) > rename rust/{qemu-api => util}/src/module.rs (97%) > rename rust/{qemu-api => util}/src/timer.rs (93%) >