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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-429c77374a5sm147347015e9.30.2024.08.13.09.52.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Aug 2024 09:52:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1723567980; x=1724172780; 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=4/XbK4W6WcusWbmEGz4mZUUTHPz5h7sU2/2RKWWgMjE=; b=qEpAocHAgUMzR8mEp5vXPgtPQlAr3eaXnOLZhP5fvhgeBoxghVWAWx8C2iH+vIuHw5 QKAG3jHdmFjCfZF31VEzdHJ20bWzxEn2Tovsb7L5spFHJoBVAP0UIjv2KypG+QcRHF33 g2MMFaqMl3NlOw+qqjKlZVMpP9Vz3DS7qQ5wpq23Up4BsGPJpHczfFpwORFa5w3XCgbR ++4Jgl+ZHxM8ZS7zoN224Q7PNhtGqy7MqiS2cpNMuKnRxoJ/wfhkzOw62sssuOvfLKr4 H1iD8wDdxfNwqNh6oNS82FxZG63ezE6YNCgmKadNdVyBTGp99gk0MLGZ4wdGG+rRK8Ig 5o1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723567980; x=1724172780; 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=4/XbK4W6WcusWbmEGz4mZUUTHPz5h7sU2/2RKWWgMjE=; b=qGmSSSD+nF7sp4w8JLIYuLkOMQJM33gMStglHvqHbq6k5YlWsxg0zVmw8rt56DOfIU wIeXvUglIQD+4XCttv2wsAPkFX7Omx/5Dhj3+RsE++OP1NShcA+H1okNK7fmtzcwVzJg VMs8MFaatMXPNGlkgfT20B0IspmgbBzYBlFDh5IRzsIhNwGnj0VPpBieGWvSpGG04bR1 iREA0id8R8FYe/52ietqvX2Iro9FsLyQUspkmqtfZAhI3UyHH1Sz26WNxdivCN7V3I4C oe8/0UOSmQhS4eH0UCnHMOP+Fbz5oxBIt0ycOYV5dTPIF7dGj05uLVQEPWy01Xh9jStB FczA== X-Gm-Message-State: AOJu0YyGo+oIY2xk+z+P1orGBx7nc4KLq6f8Ncdt0aiU3nKzOqfdN5+8 11o2zm5gI5Mj3j+Wrk3tti/wx9oQvWMpUP0rc1tia+y0C6EviO0YcFsVIHtmqutFzHHinHj79Ts v X-Google-Smtp-Source: AGHT+IHoMIxvrbbFp4iUPGngKiVpIzxkjj5OCsUaU+6ek0DDvo4QQAzXxuR1FwXZxNqkC6qcUt5a9g== X-Received: by 2002:a05:600c:4e88:b0:428:150e:4f13 with SMTP id 5b1f17b1804b1-429dd268180mr837055e9.33.1723567980021; Tue, 13 Aug 2024 09:53:00 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Cc: Thomas Huth , qemu-s390x@nongnu.org, Richard Henderson , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , David Hildenbrand , Ilya Leoshkevich , Cornelia Huck , Halil Pasic , Eric Farman , Christian Borntraeger Subject: [PATCH for-9.2 10/10] hw: Remove device_phases_reset() Date: Tue, 13 Aug 2024 17:52:50 +0100 Message-Id: <20240813165250.2717650-11-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240813165250.2717650-1-peter.maydell@linaro.org> References: <20240813165250.2717650-1-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::32b; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x32b.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: 1723568055946116600 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