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[88.187.86.199]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38c2a1bb0d4sm10518840f8f.69.2025.01.27.00.06.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 27 Jan 2025 00:06:10 -0800 (PST) Message-ID: <4ab5cc49-a8c6-430b-a3d8-82a62f0f0fe4@linaro.org> Date: Mon, 27 Jan 2025 09:06:09 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] qom: Introduce class_post_init() handler To: Markus Armbruster Cc: qemu-devel@nongnu.org, =?UTF-8?Q?Daniel_P=2E_Berrang=C3=A9?= , qemu-rust@nongnu.org, Eduardo Habkost , Manos Pitsidianakis , Paolo Bonzini References: <20250125165855.32168-1-philmd@linaro.org> <20250125165855.32168-3-philmd@linaro.org> <87wmegoi6g.fsf@pond.sub.org> Content-Language: en-US From: =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= In-Reply-To: <87wmegoi6g.fsf@pond.sub.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::433; envelope-from=philmd@linaro.org; helo=mail-wr1-x433.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable 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: , X-List-Received-Date: Mon, 27 Jan 2025 08:06:14 -0000 On 27/1/25 08:00, Markus Armbruster wrote: > Philippe Mathieu-Daudé writes: > >> Add a class_post_init() handler to be called by parents >> *after* child class_init() handler is called. This is >> necessary to have parent class check children properly >> set some values or mandatory handlers. >> >> Signed-off-by: Philippe Mathieu-Daudé > > Plausible, but I'd like to see actual use. What uses do you have in > mind? See for example: https://lore.kernel.org/qemu-devel/20250125170125.32855-25-philmd@linaro.org/ Where the abstract parent CPUClass checks concrete target implementation registered a handler. (I'll cc you on another use shortly).