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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42d9b16bfbfsm29152325e9.22.2024.09.13.08.14.18 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Sep 2024 08:14:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1726240458; x=1726845258; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=NsggWRJP3KBRd4q9MhVbNlsb0QgXLnb4719LpHM7BO4=; b=TR1on2ZiC9tjSl411W3LtZacrLw+dtq4ANl7PadI/6z64SwBZ+YUjdmvGoh719+t7l tM6sD6/yb2QrbCrNjzv+QBvOOxLwgmEWgJs2Hj8G+uISHbMO4vMdTpVQg83AdQcIH0/Q mnm4prrYSaJnc0W8x6oZrZV2iekVGY7fZvLUAf0q0RqlrTxqOzbE1veOuTDdYyT7K22w U1/3xVviu2LgbzlcFkIYcd7kBC/a4ABtfnxb2gAG4GdgQgt7jO6iRveoYBwZ59mXvtdi 5cowSytUObcUesdziSSnv4tBzr8xuEh2g9hauqECfNgV2iitmZzIE6mYrmsD0cuzcLfx SXqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726240458; x=1726845258; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=NsggWRJP3KBRd4q9MhVbNlsb0QgXLnb4719LpHM7BO4=; b=HHsAwrDrkwvlaCty4PXGZ+9rBqxlKjVMzBjFRis86iOoAscb1Fcb4q4e26tyaTbpxy s55ESStxqkTBgWSi1XRfI/tuYW+MKiF2L4f3HP4Yyuxuw/8T0523/6YcGKRIWKdd5nSL 61g5mTZp8x/3KVWDTK6ekzq4rk6T7/x9fa/d7DxJ9hOUjCxdkYeO53uOvYxaXeKgSoph 0ktLjh6dnnudNp/6bewyKlGn8A93yOtnA2dlPs59Rs2j/0LyLRG1HUj/TAJuBYiRsU74 cpNJJaQgN84cmt3/o4Kkz8w16hNPrKnt55GI6NT9YBZygRAyQi4sLnbu2l8QupKnl8AV PVLg== X-Gm-Message-State: AOJu0YxNpVz6cTp98P50CQRtI7BM21PvUUM2E259hZ9QZiWncc+hACw9 3B/zrktg5hREAh0ONsDP8z4P9cVXt/sUCOIPQDHp3sXck6BQYu2qqL/3CVS7dJX497E+K2mCmEZ e X-Google-Smtp-Source: AGHT+IHd54mqYLBNgpLP2MHv3K8qbLcnA9H8YKFYTq0j8M21NZenf/PxuNY6UPgH7LfLNxTVhXO5Dg== X-Received: by 2002:adf:e684:0:b0:374:c56c:fbb4 with SMTP id ffacd0b85a97d-378c2d0627dmr4000787f8f.22.1726240458393; Fri, 13 Sep 2024 08:14:18 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 10/27] hw/core/qdev: Simplify legacy_reset handling Date: Fri, 13 Sep 2024 16:13:54 +0100 Message-Id: <20240913151411.2167922-11-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240913151411.2167922-1-peter.maydell@linaro.org> References: <20240913151411.2167922-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::336; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x336.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 autolearn=ham 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1726240521933116600 Now that all devices which still implement a the legacy reset method register it via device_class_legacy_reset(), we can simplify the handling of these devices. Instead of using the complex Resettable::get_transitional_function machinery, we register a hold phase method which invokes the DeviceClass::legacy_reset method. This will allow us to remove all the get_transitional_function handling from resettable.c. Signed-off-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daud=C3=A9 Message-id: 20240830145812.1967042-11-peter.maydell@linaro.org --- hw/core/qdev.c | 55 ++++++++++++++++++++------------------------------ 1 file changed, 22 insertions(+), 33 deletions(-) diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 9af0ed3e1b7..db36f54d914 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -747,35 +747,6 @@ device_vmstate_if_get_id(VMStateIf *obj) return qdev_get_dev_path(dev); } =20 -static void device_transitional_reset(Object *obj) -{ - DeviceClass *dc =3D DEVICE_GET_CLASS(obj); - - /* - * Device still using DeviceClass legacy_reset method. This doesn't - * reset children. device_get_transitional_reset() checked that - * this isn't NULL. - */ - dc->legacy_reset(DEVICE(obj)); -} - -/** - * device_get_transitional_reset: - * check if the device's class is ready for multi-phase - */ -static ResettableTrFunction device_get_transitional_reset(Object *obj) -{ - DeviceClass *dc =3D DEVICE_GET_CLASS(obj); - if (dc->legacy_reset) { - /* - * dc->reset has been overridden by a subclass, - * the device is not ready for multi phase yet. - */ - return device_transitional_reset; - } - return NULL; -} - static void device_class_init(ObjectClass *class, void *data) { DeviceClass *dc =3D DEVICE_CLASS(class); @@ -800,12 +771,9 @@ static void device_class_init(ObjectClass *class, void= *data) * A NULL legacy_reset implies a three-phase reset device. Devices can * only be reset using three-phase aware mechanisms, but we still supp= ort * for transitional purposes leaf classes which set the old legacy_res= et - * method via device_class_set_legacy_reset(). If they do so, then - * device_get_transitional_reset() will notice and arrange for the - * DeviceClass::legacy_reset() method to be called during the hold pha= se. + * method via device_class_set_legacy_reset(). */ dc->legacy_reset =3D NULL; - rc->get_transitional_function =3D device_get_transitional_reset; =20 object_class_property_add_bool(class, "realized", device_get_realized, device_set_realize= d); @@ -817,8 +785,29 @@ static void device_class_init(ObjectClass *class, void= *data) offsetof(DeviceState, parent_bus), NULL= , 0); } =20 +static void do_legacy_reset(Object *obj, ResetType type) +{ + DeviceClass *dc =3D DEVICE_GET_CLASS(obj); + + dc->legacy_reset(DEVICE(obj)); +} + void device_class_set_legacy_reset(DeviceClass *dc, DeviceReset dev_reset) { + /* + * A legacy DeviceClass::reset has identical semantics to the + * three-phase "hold" method, with no "enter" or "exit" + * behaviour. Classes that use this legacy function must be leaf + * classes that do not chain up to their parent class reset. + * There is no mechanism for resetting a device that does not + * use the three-phase APIs, so the only place which calls + * the legacy_reset hook is do_legacy_reset(). + */ + ResettableClass *rc =3D RESETTABLE_CLASS(dc); + + rc->phases.enter =3D NULL; + rc->phases.hold =3D do_legacy_reset; + rc->phases.exit =3D NULL; dc->legacy_reset =3D dev_reset; } =20 --=20 2.34.1