From nobody Sun Nov 24 11:40:11 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1725030001; cv=none; d=zohomail.com; s=zohoarc; b=Wihqkq7m5D2Fr7wteHxWtTObFi7T7VJYVIhYdbSY8wRxNGB8t+m87+MeaALtUfu2Cv5lQODa5WkQNt7+6hYCs+LLlRz2T4IEcpmUhNBO8qlZSGSfaiYpUgjWH52aT1FiCMPHhEb5cUBnvZ4MtSXuAOW+HGsZjaNPleDgZdsqvcM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1725030001; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=kXRgVX3RsoF1yg/OyNdhErdKTICVaDhq2vNDFXFC+1E=; b=eI2wIIj4l5suCEcrQB3lUHW7TWmspZCTbqoQVZWITFnszPvb5QSGTrWxcFav9r/90mWD0nI4GfFihLC5MHHVRTsAJGhWKfwe7+aoJJKHbL76EswFn2AodPXEsarDV2nAFMUlrHYGM20qRD2STqqmdx//33FLcp1FQR2oceQTSdE= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1725030001145352.08437166692886; Fri, 30 Aug 2024 08:00:01 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sk351-0005Hp-QO; Fri, 30 Aug 2024 10:58:27 -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 1sk350-0005Dg-Q5 for qemu-devel@nongnu.org; Fri, 30 Aug 2024 10:58:26 -0400 Received: from mail-wm1-x332.google.com ([2a00:1450:4864:20::332]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sk34y-0004bl-Dj for qemu-devel@nongnu.org; Fri, 30 Aug 2024 10:58:26 -0400 Received: by mail-wm1-x332.google.com with SMTP id 5b1f17b1804b1-42bb72a5e0bso16026425e9.1 for ; Fri, 30 Aug 2024 07:58:23 -0700 (PDT) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42bb6da24bbsm49022345e9.0.2024.08.30.07.58.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Aug 2024 07:58:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1725029901; x=1725634701; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=kXRgVX3RsoF1yg/OyNdhErdKTICVaDhq2vNDFXFC+1E=; b=tK0JHuzO3OrsGmuV3puTjS1/B5DfQAFme6OtX4+v+bJQOdjI2ENpazxiWzT9YXKgXC 4sWIuECo7rC2/lxoE+ycrd67NS7PKVTGKAEFY6RMzTrSnkMOWTEhjhN00Z6mAGmve+jU nGdIVFVglYYiDHkJFEIowx0FmSYOHt4VoMoAjvnqgdp7vGLFYTI2Z/KZbxxHI6lB0AeX 97YaZdsvUOZ2rXme2FZXjhWbHSmiePYu/58tVOcccnV7Kdo2TYwAdelifcDXnOmegGXt P7+5YKAYPUpakNSww3kV/YT87D8FiQyO7caygZEqP7RoSR8CrmRnX8Eb3OYV02LJtzLZ KbdQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725029901; x=1725634701; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=kXRgVX3RsoF1yg/OyNdhErdKTICVaDhq2vNDFXFC+1E=; b=f2MXtk9kC8+9I+yDC/W7kDrqQ6oWIDX3NbJANNqWgyJ0lEoZBT+aIIL/6DQgXmwi9K zKx5r2Chi/22GN4U2lMDHAd6yzQJCztwZT0KnxLIEw8kf8yD6RWdz8QEsTTyBF+eti4S ueV/xTND1SoMXmQoJU2RXGxE2LjWuEbjh79fV3UaEFuvz/FcDXSi6VtCQK0wVIN65z9L 6Qk5VgUXBs47DGg6/KjgZ09bnsxmQ1hGK7hQVRDhDNdzK6JXPXrHxLyHCfN/Ksz/eQgC DFNL4615ldDxjeO5kZTXL2R4WORn4bW/sl0B+ASS4rujO42bUrlz2o+GxLt98UoS+/Sj X4cg== X-Gm-Message-State: AOJu0YzN6v+0gHhWQPX0aM/Y9+AOWZcm6PftbwnRRe6ftwHjxKkq4X7k awz8VD8A8z6F/cs//KXS9mqVaMAVKazvtwO26iO/PooDFXtodG9vNWKjIDQaV05Gu0B6Ksu+HAA c X-Google-Smtp-Source: AGHT+IE1IvE7R5uFqvq1Wxx3kOyVfdW8XYO05Po+tlqueONXt/Lcaqp3rQQCkYKdSdGflQlgT+Abvg== X-Received: by 2002:a05:600c:1c1b:b0:426:6f27:379a with SMTP id 5b1f17b1804b1-42bb01b4c35mr49962395e9.13.1725029900749; Fri, 30 Aug 2024 07:58:20 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Cc: qemu-s390x@nongnu.org, Thomas Huth , Richard Henderson , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , David Hildenbrand , Ilya Leoshkevich , Cornelia Huck , Halil Pasic , Eric Farman , Christian Borntraeger , Nico Boehr , Nina Schoetterl-Glausch Subject: [PATCH v2 09/11] hw: Remove device_phases_reset() Date: Fri, 30 Aug 2024 15:58:10 +0100 Message-Id: <20240830145812.1967042-10-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240830145812.1967042-1-peter.maydell@linaro.org> References: <20240830145812.1967042-1-peter.maydell@linaro.org> MIME-Version: 1.0 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::332; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x332.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-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: 1725030002410116600 Content-Type: text/plain; charset="utf-8" Currently we have transitional machinery between legacy reset and three phase reset that works in two directions: * if you invoke three phase reset on a device which has set the DeviceClass::legacy_reset method, we detect this in device_get_transitional_reset() and arrange that we call the legacy_reset method during the hold phase of reset * if you invoke legacy reset on a device which implements three phase reset, the default legacy_reset method is device_phases_reset(), which does a three-phase reset of the device However, we have now eliminated all the places which could invoke legacy reset on a device, which means that the function device_phases_reset() is never called -- it serves only as the value of DeviceClass::legacy_reset that indicates that the subclass never overrode the legacy reset method. So we can delete it, and instead check for legacy_reset !=3D NULL. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson --- hw/core/qdev.c | 51 ++++++++++++-------------------------------------- 1 file changed, 12 insertions(+), 39 deletions(-) diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 460114609b0..9af0ed3e1b7 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -747,38 +747,16 @@ device_vmstate_if_get_id(VMStateIf *obj) return qdev_get_dev_path(dev); } =20 -/** - * device_phases_reset: - * Transition reset method for devices to allow moving - * smoothly from legacy reset method to multi-phases - */ -static void device_phases_reset(DeviceState *dev) -{ - ResettableClass *rc =3D RESETTABLE_GET_CLASS(dev); - - if (rc->phases.enter) { - rc->phases.enter(OBJECT(dev), RESET_TYPE_COLD); - } - if (rc->phases.hold) { - rc->phases.hold(OBJECT(dev), RESET_TYPE_COLD); - } - if (rc->phases.exit) { - rc->phases.exit(OBJECT(dev), RESET_TYPE_COLD); - } -} - static void device_transitional_reset(Object *obj) { DeviceClass *dc =3D DEVICE_GET_CLASS(obj); =20 /* - * This will call either @device_phases_reset (for multi-phases transi= tioned - * devices) or a device's specific method for not-yet transitioned dev= ices. - * In both case, it does not reset children. + * Device still using DeviceClass legacy_reset method. This doesn't + * reset children. device_get_transitional_reset() checked that + * this isn't NULL. */ - if (dc->legacy_reset) { - dc->legacy_reset(DEVICE(obj)); - } + dc->legacy_reset(DEVICE(obj)); } =20 /** @@ -788,7 +766,7 @@ static void device_transitional_reset(Object *obj) static ResettableTrFunction device_get_transitional_reset(Object *obj) { DeviceClass *dc =3D DEVICE_GET_CLASS(obj); - if (dc->legacy_reset !=3D device_phases_reset) { + if (dc->legacy_reset) { /* * dc->reset has been overridden by a subclass, * the device is not ready for multi phase yet. @@ -819,19 +797,14 @@ static void device_class_init(ObjectClass *class, voi= d *data) rc->child_foreach =3D device_reset_child_foreach; =20 /* - * @device_phases_reset is put as the default reset method below, allo= wing - * to do the multi-phase transition from base classes to leaf classes.= It - * allows a legacy-reset Device class to extend a multi-phases-reset - * Device class for the following reason: - * + If a base class B has been moved to multi-phase, then it does not - * override this default reset method and may have defined phase met= hods. - * + A child class C (extending class B) which uses - * device_class_set_parent_reset() (or similar means) to override the - * reset method will still work as expected. @device_phases_reset fu= nction - * will be registered as the parent reset method and effectively call - * parent reset phases. + * 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. */ - device_class_set_legacy_reset(dc, device_phases_reset); + dc->legacy_reset =3D NULL; rc->get_transitional_function =3D device_get_transitional_reset; =20 object_class_property_add_bool(class, "realized", --=20 2.34.1