From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5CB9FCCF9EE for ; Tue, 28 Oct 2025 10:21:21 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vDgoq-0005tn-TX; Tue, 28 Oct 2025 06:20:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vDgoF-0005aJ-EC for qemu-rust@nongnu.org; Tue, 28 Oct 2025 06:20:15 -0400 Received: from sg-1-14.ptr.blmpb.com ([118.26.132.14]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1vDgo0-0001sB-Jc for qemu-rust@nongnu.org; Tue, 28 Oct 2025 06:20:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; s=s1; d=openatom-club.20200927.dkim.feishu.cn; t=1761646713; h=from:subject:mime-version:from:date:message-id:subject:to:cc: reply-to:content-type:mime-version:in-reply-to:message-id; bh=5jaYdlz9cq3d+ZqdMwPs227DOqydqYv4NqJ56w4RRj8=; b=Sd+m1qX0E9KA79QmaJaDexlJwzVRc6OTVPin5POB9vaLIjyAte7utE3CJ01PErbCud5c3k fNRQG1MJKHKo0gnxVQtHdbBJ1AdOnKTS0RHu5zOmxtAbQLW6WApi8qC8Rd9ttPUtAdOh84 7lBW3jf76lUgOlIahbKyyHtJTbJtXNVJvQwWUtLiOq7Aydzi7iEI3AwlM41UaHHBd2mka1 yg6+uXpXJRX3wpAs6R4gALKe56ahKXvWQzDRZCRafISOF+dUUoUKx717n2z2ZkueahOUpf 7vVYuVIvMVCG3fbYsPaWCF/y2KRUBiCzKMMFxQ+pjkRA5uldKz57n3aueVSZAA== X-Original-From: chenmiao Content-Transfer-Encoding: 7bit Cc: , , , , "Chen Miao" X-Mailer: git-send-email 2.43.0 Content-Type: text/plain; charset=UTF-8 X-Lms-Return-Path: To: , , , , Subject: [RFC PATCH v2 0/5] rust/hw: Add the I2C and the first GPIO device Message-Id: Received: from nyaos.localdomain ([114.249.194.57]) by smtp.feishu.cn with ESMTPS; Tue, 28 Oct 2025 18:18:30 +0800 From: "chenmiao" Date: Tue, 28 Oct 2025 10:18:24 +0000 Mime-Version: 1.0 Received-SPF: pass client-ip=118.26.132.14; envelope-from=chenmiao@openatom.club; helo=sg-1-14.ptr.blmpb.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-rust@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: QEMU Rust-related patches and discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-rust-bounces+qemu-rust=archiver.kernel.org@nongnu.org Sender: qemu-rust-bounces+qemu-rust=archiver.kernel.org@nongnu.org We have implemented I2C and the first GPIO device in Rust for QEMU. Additionally, in the respective patches, we have shared our insights and experiences regarding the use of Rust for device modeling within QEMU. 1. The first patch implements the BusState for the I2CBus infrastructure. 2. The second patch implements the I2CBus and I2CSlave infrastructure, along with a discussion of the challenges encountered during the implementation. 3. The third patch moves the struct definition of the PCF8574 to the corresponding header file. 4. The fourth patch provides a set of necessary helper functions for the PCF8574 GPIO device. 5. The fifth patch implements the PCF8574 GPIO device, along with a discussion of the issues and considerations addressed during the implementation. Regarding this series of patches, we have found that Rust for QEMU is indeed still not mature enough and requires continuous iteration. Additionally, the lack of basic documentation also needs to be addressed. In this regard, I hope our team(HUST OpenAtom Open Source Club) can contribute to the documentation efforts for Rust for QEMU. Link: https://groups.google.com/g/hust-os-kernel-patches/c/z7vHWg3xvDc Signed-off-by: Chao Liu Signed-off-by: Chen Miao --- Changes in V2: - According to Zhao's suggestions, some modifications were made to the first and second patches respectively, such as changing some bus names, adding some Safety comments, and adding callbacks for I2CSlave. - While we were making changes to the first PATCH, Chao Liu pointed out that the realize function was unnecessary in the bus. After discussion, we removed the bus::realize function. Since no other components are currently using the bus, we added a TODO comment for clarification. chenmiao (5): rust/hw/core: Add the BusState of rust version rust/hw/core: Add rust bindings/funcs for i2c bus hw/gpio: Move the pcf8574 struct to header rust/hw/core: Provide some interfaces for the GPIO device rust/hw/gpio: Add the the first gpio device pcf8574 hw/gpio/Kconfig | 5 + hw/gpio/meson.build | 2 +- hw/gpio/pcf8574.c | 32 -- include/hw/gpio/pcf8574.h | 36 +++ rust/Cargo.lock | 21 +- rust/Cargo.toml | 1 + rust/hw/Kconfig | 1 + rust/hw/core/meson.build | 2 + rust/hw/core/src/bus.rs | 44 +++ rust/hw/core/src/i2c.rs | 421 +++++++++++++++++++++++++++ rust/hw/core/src/irq.rs | 6 +- rust/hw/core/src/lib.rs | 6 + rust/hw/core/src/qdev.rs | 12 +- rust/hw/core/wrapper.h | 1 + rust/hw/gpio/Kconfig | 2 + rust/hw/gpio/meson.build | 1 + rust/hw/gpio/pcf8574/Cargo.toml | 31 ++ rust/hw/gpio/pcf8574/build.rs | 1 + rust/hw/gpio/pcf8574/meson.build | 50 ++++ rust/hw/gpio/pcf8574/src/bindings.rs | 29 ++ rust/hw/gpio/pcf8574/src/device.rs | 180 ++++++++++++ rust/hw/gpio/pcf8574/src/lib.rs | 4 + rust/hw/gpio/pcf8574/wrapper.h | 51 ++++ rust/hw/meson.build | 1 + 24 files changed, 902 insertions(+), 38 deletions(-) create mode 100644 rust/hw/core/src/bus.rs create mode 100644 rust/hw/core/src/i2c.rs create mode 100644 rust/hw/gpio/Kconfig create mode 100644 rust/hw/gpio/meson.build create mode 100644 rust/hw/gpio/pcf8574/Cargo.toml create mode 120000 rust/hw/gpio/pcf8574/build.rs create mode 100644 rust/hw/gpio/pcf8574/meson.build create mode 100644 rust/hw/gpio/pcf8574/src/bindings.rs create mode 100644 rust/hw/gpio/pcf8574/src/device.rs create mode 100644 rust/hw/gpio/pcf8574/src/lib.rs create mode 100644 rust/hw/gpio/pcf8574/wrapper.h -- 2.43.0