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Tsirkin" , Marcel Apfelbaum , John Snow , qemu-block@nongnu.org (open list:IDE) Subject: [PATCH v2 1/3] hw/ide/piix: Remove redundant "piix3-ide-xen" device class Date: Fri, 13 May 2022 20:09:55 +0200 Message-Id: <20220513180957.90514-2-shentey@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220513180957.90514-1-shentey@gmail.com> References: <20220513180957.90514-1-shentey@gmail.com> MIME-Version: 1.0 Commit 0f8445820f11a69154309863960328dda3dc1ad4 'xen: piix reuse pci generic class init function' already resolved redundant code which in turn rendered piix3-ide-xen redundant. Signed-off-by: Bernhard Beschow Reviewed-by: Anthony PERARD --- hw/i386/pc_piix.c | 3 +-- hw/ide/piix.c | 7 ------- 2 files changed, 1 insertion(+), 9 deletions(-) diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index f843dd906f..c2bf33d2f1 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -244,8 +244,7 @@ static void pc_init1(MachineState *machine, if (pcmc->pci_enabled) { PCIDevice *dev; - dev = pci_create_simple(pci_bus, piix3_devfn + 1, - xen_enabled() ? "piix3-ide-xen" : "piix3-ide"); + dev = pci_create_simple(pci_bus, piix3_devfn + 1, "piix3-ide"); pci_ide_create_devs(dev); idebus[0] = qdev_get_child_bus(&dev->qdev, "ide.0"); idebus[1] = qdev_get_child_bus(&dev->qdev, "ide.1"); diff --git a/hw/ide/piix.c b/hw/ide/piix.c index ce89fd0aa3..2345fe9e1d 100644 --- a/hw/ide/piix.c +++ b/hw/ide/piix.c @@ -241,12 +241,6 @@ static const TypeInfo piix3_ide_info = { .class_init = piix3_ide_class_init, }; -static const TypeInfo piix3_ide_xen_info = { - .name = "piix3-ide-xen", - .parent = TYPE_PCI_IDE, - .class_init = piix3_ide_class_init, -}; - /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */ static void piix4_ide_class_init(ObjectClass *klass, void *data) { @@ -272,7 +266,6 @@ static const TypeInfo piix4_ide_info = { static void piix_ide_register_types(void) { type_register_static(&piix3_ide_info); - type_register_static(&piix3_ide_xen_info); type_register_static(&piix4_ide_info); } From patchwork Fri May 13 18:09:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bernhard Beschow X-Patchwork-Id: 12849206 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 361F0C433F5 for ; Fri, 13 May 2022 18:10:31 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.328678.551777 (Exim 4.92) (envelope-from ) id 1npZjw-0006GB-6H; Fri, 13 May 2022 18:10:12 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 328678.551777; Fri, 13 May 2022 18:10:12 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1npZjw-0006FN-2B; Fri, 13 May 2022 18:10:12 +0000 Received: by outflank-mailman (input) for mailman id 328678; Fri, 13 May 2022 18:10:10 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1npZju-0005kx-Ga for xen-devel@lists.xenproject.org; Fri, 13 May 2022 18:10:10 +0000 Received: from mail-ej1-x631.google.com (mail-ej1-x631.google.com [2a00:1450:4864:20::631]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id ecdeada5-d2e7-11ec-aa76-f101dd46aeb6; Fri, 13 May 2022 20:10:09 +0200 (CEST) Received: by mail-ej1-x631.google.com with SMTP id bv19so17737346ejb.6 for ; Fri, 13 May 2022 11:10:09 -0700 (PDT) Received: from Provence.localdomain (dynamic-089-014-181-123.89.14.pool.telefonica.de. [89.14.181.123]) by smtp.gmail.com with ESMTPSA id e11-20020a170906648b00b006fa84a0af2asm1040008ejm.16.2022.05.13.11.10.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 May 2022 11:10:09 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: ecdeada5-d2e7-11ec-aa76-f101dd46aeb6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Hp6j9E0komHwkQmjVaaJwGXlUmBw15qUD+2uycCxKRo=; b=F6ECj1KowlkuN7ndNLG4RXVONt3ugmk+q9Hi/xtsP3eiZ8ZL0nuSrxMOKrM5piAaMn oZVcacYQpx5jhTeQ451SnkGgZgcC+2FArUYvOOba7IXnLkpiLCmSjrJfH4140JrGfdaA DDKaBGot+x4QfZLJkUdcSRyMZy0355YA3JjyVQvKWKDVe9Oc+c0902kRxqJK47A9Owbz Wo23wbWOu/V3dS/MJkCO1+CxAj1a90WzQguDmjmui18vahU9ZuOVJyd1wrOW8CmmC5TW z1SN7HYd8RGG1I4E7qL0Om7lIq4IW5FH2ooK04osvFfWLUC7kJYdyWSiUU5whYG7aJw1 CYYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Hp6j9E0komHwkQmjVaaJwGXlUmBw15qUD+2uycCxKRo=; b=lWmjbLbtcbbxGsdl9GhC27MTosBekpPrlKM2Wsujhej/Dw2vWgz1EziYR7t8zMwKNN mG9VRupgkFl64VdqHYk4ma9PDmG6SmCntzAXOvQwU/UTHT5DoATPvcj50Vllft7zBDyp Jn7y3ifVZFpxN3YmbX9eyYxRTzHgVqN5mpT9vWS1X+6B0KwZEKZcXlA01atNO4+TCNbZ QX/tlIQm0uPxQKQWmEowHRCtTUtqA1VPJh7DzLxClQMrHXj5unjHzNz0EQrulw38Cv87 d4DF84Fw5s1pADpC6cdElFvrwwZAz7DPebbXJyx3kAr5TT/cdJd8YYJfahglH6XmLkPJ /s0g== X-Gm-Message-State: AOAM530JZ5pE9FyDPKd0PHQ9Dnx6V6VsQiTGhp5+avfKk7VoSok5EziA bCfdukTidbKnFsy/K2jPDzc= X-Google-Smtp-Source: ABdhPJwgEkBcZJqTIki5Kg8REFF/cfX7eSZw1juY5Lx09Lc2VuiwHYjI+5INyzSwkKmlGUFfLJt8Rw== X-Received: by 2002:a17:906:4fd5:b0:6f8:5784:fddb with SMTP id i21-20020a1709064fd500b006f85784fddbmr5572529ejw.161.1652465409259; Fri, 13 May 2022 11:10:09 -0700 (PDT) From: Bernhard Beschow To: qemu-devel@nongnu.org Cc: qemu-trivial@nongnu.org, sstabellini@kernel.org, anthony.perard@citrix.com, paul@xen.org, xen-devel@lists.xenproject.org, Bernhard Beschow , John Snow , qemu-block@nongnu.org (open list:IDE) Subject: [PATCH v2 2/3] hw/ide/piix: Add some documentation to pci_piix3_xen_ide_unplug() Date: Fri, 13 May 2022 20:09:56 +0200 Message-Id: <20220513180957.90514-3-shentey@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220513180957.90514-1-shentey@gmail.com> References: <20220513180957.90514-1-shentey@gmail.com> MIME-Version: 1.0 The comment is based on commit message ae4d2eb273b167dad748ea4249720319240b1ac2 'xen-platform: add missing disk unplug option'. Since it seems to describe design decisions and limitations that still apply it seems worth having. Signed-off-by: Bernhard Beschow Reviewed-by: Anthony PERARD --- hw/ide/piix.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/hw/ide/piix.c b/hw/ide/piix.c index 2345fe9e1d..bc1b37512a 100644 --- a/hw/ide/piix.c +++ b/hw/ide/piix.c @@ -173,6 +173,17 @@ static void pci_piix_ide_realize(PCIDevice *dev, Error **errp) } } +/* + * The Xen HVM unplug protocol [1] specifies a mechanism to allow guests to + * request unplug of 'aux' disks (which is stated to mean all IDE disks, + * except the primary master). + * + * NOTE: The semantics of what happens if unplug of all disks and 'aux' disks + * is simultaneously requested is not clear. The implementation assumes + * that an 'all' request overrides an 'aux' request. + * + * [1] https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=docs/misc/hvm-emulated-unplug.pandoc + */ int pci_piix3_xen_ide_unplug(DeviceState *dev, bool aux) { PCIIDEState *pci_ide; From patchwork Fri May 13 18:09:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Bernhard Beschow X-Patchwork-Id: 12849205 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 CAB5EC433FE for ; Fri, 13 May 2022 18:10:30 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.328679.551783 (Exim 4.92) (envelope-from ) id 1npZjw-0006MU-Mz; Fri, 13 May 2022 18:10:12 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 328679.551783; Fri, 13 May 2022 18:10:12 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1npZjw-0006Kl-GP; Fri, 13 May 2022 18:10:12 +0000 Received: by outflank-mailman (input) for mailman id 328679; Fri, 13 May 2022 18:10:11 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1npZjv-0005kx-Me for xen-devel@lists.xenproject.org; Fri, 13 May 2022 18:10:11 +0000 Received: from mail-ej1-x632.google.com (mail-ej1-x632.google.com [2a00:1450:4864:20::632]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id ed969dc2-d2e7-11ec-aa76-f101dd46aeb6; Fri, 13 May 2022 20:10:10 +0200 (CEST) Received: by mail-ej1-x632.google.com with SMTP id ks9so17763395ejb.2 for ; Fri, 13 May 2022 11:10:10 -0700 (PDT) Received: from Provence.localdomain (dynamic-089-014-181-123.89.14.pool.telefonica.de. [89.14.181.123]) by smtp.gmail.com with ESMTPSA id e11-20020a170906648b00b006fa84a0af2asm1040008ejm.16.2022.05.13.11.10.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 May 2022 11:10:10 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: ed969dc2-d2e7-11ec-aa76-f101dd46aeb6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=CBXAkFrCGs28BI30AzYWmYh3sIrQDSjFAmvH5xdAdFk=; b=Bgcy7jIh1t61wlZnBAq+JZld3nOesqYuWWAdJJQ0sl5bxUB9nsHbDiHngRu1OutYbW OG4VHmgNSqmhme8qgcCXmbEvIbIkbJDxxYz0+LuY/SJhWJjQ3/CYEQ9XFbgPX1dsLuxf XIGJ53kceKKUz2qVjgUC/cWmwF3HbLDV5msbnHnu8HPlavKmPUxicAXfXl2G0GqjwW32 mYHwZUV1bTyn8D8pLeBFHjF+NFVyzw1boC9HcP8y/EX8ZZ4I4r3zhkHORo6RIDVJjr/l ESmOonSf3nBPpEBH/WkgN4DFFIGJVy2vYJJOgtj8wUkMscuLJRjrQ4/xw3nRhil/1CJL xNKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=CBXAkFrCGs28BI30AzYWmYh3sIrQDSjFAmvH5xdAdFk=; b=BxpW4U0cJuvwGLVQgedT6caloKpfusMQgV0qSBCMjsYi5uGjg8x6WnZeVQUA31ID2j X+t7kGPSenj4fQTykkKVjL6f7JCt3fF3Kaszr5ToudqfjLXN7+oF69FRfTr4VZLxBiuk /nlp3+hSsm7NiluzD+JF/rfictZlc1EfOPxNYh2QoPtCBwYKIwqN98nHkekSI5q+ZQeD QiH8JKx9dpLzrQYrp2Sbh96+EEHkkYgmjX1xllDWwMecYDrqCry3sB1XOdeNtWvmrjXz xIE830UMbzMGTKS/e7JfTbC5xKypzg+kmskqff7o4mVeqkbdMabtm8RF+KwI68EtIgAY HTVA== X-Gm-Message-State: AOAM530G4mfcCJWICuqfTrpse97scmoYudE1KVtiNVRtNEksrWZmc/iB taiH2YgkiW4odyx+KojasNM= X-Google-Smtp-Source: ABdhPJzd1ozMHGZZFnRvVPDcf7J6MJFx90w5pAiPDrPJQobwuWQ40761pwClkT/3oeGExjerubnvSw== X-Received: by 2002:a17:907:97c4:b0:6f8:5ec5:61e2 with SMTP id js4-20020a17090797c400b006f85ec561e2mr5456098ejc.559.1652465410414; Fri, 13 May 2022 11:10:10 -0700 (PDT) From: Bernhard Beschow To: qemu-devel@nongnu.org Cc: qemu-trivial@nongnu.org, sstabellini@kernel.org, anthony.perard@citrix.com, paul@xen.org, xen-devel@lists.xenproject.org, Bernhard Beschow , "Michael S. Tsirkin" , Marcel Apfelbaum , Paolo Bonzini , Richard Henderson , Eduardo Habkost , John Snow , qemu-block@nongnu.org (open list:IDE) Subject: [PATCH v2 3/3] include/hw/ide: Unexport pci_piix3_xen_ide_unplug() Date: Fri, 13 May 2022 20:09:57 +0200 Message-Id: <20220513180957.90514-4-shentey@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220513180957.90514-1-shentey@gmail.com> References: <20220513180957.90514-1-shentey@gmail.com> MIME-Version: 1.0 This function was declared in a generic and public header, implemented in a device-specific source file but only used in xen_platform. Given its 'aux' parameter, this function is more xen-specific than piix-specific. Also, the hardcoded magic constants seem to be generic and related to PCIIDEState and IDEBus rather than piix. Therefore, move this function to xen_platform, unexport it, and drop the "piix3" in the function name as well. Signed-off-by: Bernhard Beschow Reviewed-by: Paul Durrant Acked-by: Anthony PERARD Reviewed-by: Philippe Mathieu-Daudé --- hw/i386/xen/xen_platform.c | 48 +++++++++++++++++++++++++++++++++++++- hw/ide/piix.c | 46 ------------------------------------ include/hw/ide.h | 3 --- 3 files changed, 47 insertions(+), 50 deletions(-) diff --git a/hw/i386/xen/xen_platform.c b/hw/i386/xen/xen_platform.c index 72028449ba..a64265cca0 100644 --- a/hw/i386/xen/xen_platform.c +++ b/hw/i386/xen/xen_platform.c @@ -26,6 +26,7 @@ #include "qemu/osdep.h" #include "qapi/error.h" #include "hw/ide.h" +#include "hw/ide/pci.h" #include "hw/pci/pci.h" #include "hw/xen/xen_common.h" #include "migration/vmstate.h" @@ -134,6 +135,51 @@ static void pci_unplug_nics(PCIBus *bus) pci_for_each_device(bus, 0, unplug_nic, NULL); } +/* + * The Xen HVM unplug protocol [1] specifies a mechanism to allow guests to + * request unplug of 'aux' disks (which is stated to mean all IDE disks, + * except the primary master). + * + * NOTE: The semantics of what happens if unplug of all disks and 'aux' disks + * is simultaneously requested is not clear. The implementation assumes + * that an 'all' request overrides an 'aux' request. + * + * [1] https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=docs/misc/hvm-emulated-unplug.pandoc + */ +static void pci_xen_ide_unplug(DeviceState *dev, bool aux) +{ + PCIIDEState *pci_ide; + int i; + IDEDevice *idedev; + IDEBus *idebus; + BlockBackend *blk; + + pci_ide = PCI_IDE(dev); + + for (i = aux ? 1 : 0; i < 4; i++) { + idebus = &pci_ide->bus[i / 2]; + blk = idebus->ifs[i % 2].blk; + + if (blk && idebus->ifs[i % 2].drive_kind != IDE_CD) { + if (!(i % 2)) { + idedev = idebus->master; + } else { + idedev = idebus->slave; + } + + blk_drain(blk); + blk_flush(blk); + + blk_detach_dev(blk, DEVICE(idedev)); + idebus->ifs[i % 2].blk = NULL; + idedev->conf.blk = NULL; + monitor_remove_blk(blk); + blk_unref(blk); + } + } + qdev_reset_all(dev); +} + static void unplug_disks(PCIBus *b, PCIDevice *d, void *opaque) { uint32_t flags = *(uint32_t *)opaque; @@ -147,7 +193,7 @@ static void unplug_disks(PCIBus *b, PCIDevice *d, void *opaque) switch (pci_get_word(d->config + PCI_CLASS_DEVICE)) { case PCI_CLASS_STORAGE_IDE: - pci_piix3_xen_ide_unplug(DEVICE(d), aux); + pci_xen_ide_unplug(DEVICE(d), aux); break; case PCI_CLASS_STORAGE_SCSI: diff --git a/hw/ide/piix.c b/hw/ide/piix.c index bc1b37512a..9a9b28078e 100644 --- a/hw/ide/piix.c +++ b/hw/ide/piix.c @@ -173,52 +173,6 @@ static void pci_piix_ide_realize(PCIDevice *dev, Error **errp) } } -/* - * The Xen HVM unplug protocol [1] specifies a mechanism to allow guests to - * request unplug of 'aux' disks (which is stated to mean all IDE disks, - * except the primary master). - * - * NOTE: The semantics of what happens if unplug of all disks and 'aux' disks - * is simultaneously requested is not clear. The implementation assumes - * that an 'all' request overrides an 'aux' request. - * - * [1] https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=docs/misc/hvm-emulated-unplug.pandoc - */ -int pci_piix3_xen_ide_unplug(DeviceState *dev, bool aux) -{ - PCIIDEState *pci_ide; - int i; - IDEDevice *idedev; - IDEBus *idebus; - BlockBackend *blk; - - pci_ide = PCI_IDE(dev); - - for (i = aux ? 1 : 0; i < 4; i++) { - idebus = &pci_ide->bus[i / 2]; - blk = idebus->ifs[i % 2].blk; - - if (blk && idebus->ifs[i % 2].drive_kind != IDE_CD) { - if (!(i % 2)) { - idedev = idebus->master; - } else { - idedev = idebus->slave; - } - - blk_drain(blk); - blk_flush(blk); - - blk_detach_dev(blk, DEVICE(idedev)); - idebus->ifs[i % 2].blk = NULL; - idedev->conf.blk = NULL; - monitor_remove_blk(blk); - blk_unref(blk); - } - } - qdev_reset_all(dev); - return 0; -} - static void pci_piix_ide_exitfn(PCIDevice *dev) { PCIIDEState *d = PCI_IDE(dev); diff --git a/include/hw/ide.h b/include/hw/ide.h index c5ce5da4f4..60f1f4f714 100644 --- a/include/hw/ide.h +++ b/include/hw/ide.h @@ -8,9 +8,6 @@ ISADevice *isa_ide_init(ISABus *bus, int iobase, int iobase2, int isairq, DriveInfo *hd0, DriveInfo *hd1); -/* ide-pci.c */ -int pci_piix3_xen_ide_unplug(DeviceState *dev, bool aux); - /* ide-mmio.c */ void mmio_ide_init_drives(DeviceState *dev, DriveInfo *hd0, DriveInfo *hd1);