From patchwork Fri Apr 16 12:52:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 12207613 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56309C433B4 for ; Fri, 16 Apr 2021 12:54:16 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 807D061107 for ; Fri, 16 Apr 2021 12:54:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 807D061107 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37172 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lXNzC-0002Za-J1 for qemu-devel@archiver.kernel.org; Fri, 16 Apr 2021 08:54:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53508) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXNy9-00023r-Gw for qemu-devel@nongnu.org; Fri, 16 Apr 2021 08:53:09 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:30831) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXNy5-0007iA-1v for qemu-devel@nongnu.org; Fri, 16 Apr 2021 08:53:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618577584; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=2e59MtSLhx7S3f+tAr2YfXXoO6u82PDESXCpvKv5zc4=; b=h4LpiJM7wDLscL80jvMMQyxkMyngO2cWAd2Jys3EpThMaovXrJS7SHHWclPmQsguZ4HQjx Kup2HrC3yEiCvGVwWVFpKUqSY4MFz4pbvc58AEArFUQro3uL9xMk6SmVYs3/vxLYDmqIb7 +YVGAgeE0ieyAQV1uGwj5T6dkM8iQtw= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-477-woi9wyM5NVCEed1KWmxFxg-1; Fri, 16 Apr 2021 08:53:02 -0400 X-MC-Unique: woi9wyM5NVCEed1KWmxFxg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1C57E1006C87; Fri, 16 Apr 2021 12:53:01 +0000 (UTC) Received: from thuth.com (ovpn-112-57.ams2.redhat.com [10.36.112.57]) by smtp.corp.redhat.com (Postfix) with ESMTP id 726E65D9C6; Fri, 16 Apr 2021 12:52:59 +0000 (UTC) From: Thomas Huth To: qemu-devel@nongnu.org, John Snow Subject: [PATCH] hw/ide: Fix crash when plugging a piix3-ide device into the x-remote machine Date: Fri, 16 Apr 2021 14:52:56 +0200 Message-Id: <20210416125256.2039734-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Elena Ufimtseva , John G Johnson , Jagannathan Raman , qemu-block@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" QEMU currently crashes when the user tries to do something like: qemu-system-x86_64 -M x-remote -device piix3-ide This happens because the "isabus" variable is not initialized with the x-remote machine yet. Add a proper check for this condition and propagate the error to the caller, so we can fail there gracefully. Signed-off-by: Thomas Huth Reviewed-by: John Snow --- hw/ide/ioport.c | 16 ++++++++++------ hw/ide/piix.c | 22 +++++++++++++++++----- hw/isa/isa-bus.c | 14 ++++++++++---- include/hw/ide/internal.h | 2 +- include/hw/isa/isa.h | 13 ++++++++----- 5 files changed, 46 insertions(+), 21 deletions(-) diff --git a/hw/ide/ioport.c b/hw/ide/ioport.c index b613ff3bba..e6caa537fa 100644 --- a/hw/ide/ioport.c +++ b/hw/ide/ioport.c @@ -50,15 +50,19 @@ static const MemoryRegionPortio ide_portio2_list[] = { PORTIO_END_OF_LIST(), }; -void ide_init_ioport(IDEBus *bus, ISADevice *dev, int iobase, int iobase2) +int ide_init_ioport(IDEBus *bus, ISADevice *dev, int iobase, int iobase2) { + int ret; + /* ??? Assume only ISA and PCI configurations, and that the PCI-ISA bridge has been setup properly to always register with ISA. */ - isa_register_portio_list(dev, &bus->portio_list, - iobase, ide_portio_list, bus, "ide"); + ret = isa_register_portio_list(dev, &bus->portio_list, + iobase, ide_portio_list, bus, "ide"); - if (iobase2) { - isa_register_portio_list(dev, &bus->portio2_list, - iobase2, ide_portio2_list, bus, "ide"); + if (ret == 0 && iobase2) { + ret = isa_register_portio_list(dev, &bus->portio2_list, + iobase2, ide_portio2_list, bus, "ide"); } + + return ret; } diff --git a/hw/ide/piix.c b/hw/ide/piix.c index b9860e35a5..d3e738320b 100644 --- a/hw/ide/piix.c +++ b/hw/ide/piix.c @@ -26,6 +26,7 @@ #include "qemu/osdep.h" #include "hw/pci/pci.h" #include "migration/vmstate.h" +#include "qapi/error.h" #include "qemu/module.h" #include "sysemu/block-backend.h" #include "sysemu/blockdev.h" @@ -123,7 +124,8 @@ static void piix_ide_reset(DeviceState *dev) pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */ } -static void pci_piix_init_ports(PCIIDEState *d) { +static int pci_piix_init_ports(PCIIDEState *d) +{ static const struct { int iobase; int iobase2; @@ -132,24 +134,30 @@ static void pci_piix_init_ports(PCIIDEState *d) { {0x1f0, 0x3f6, 14}, {0x170, 0x376, 15}, }; - int i; + int i, ret; for (i = 0; i < 2; i++) { ide_bus_new(&d->bus[i], sizeof(d->bus[i]), DEVICE(d), i, 2); - ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase, - port_info[i].iobase2); + ret = ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase, + port_info[i].iobase2); + if (ret) { + return ret; + } ide_init2(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq)); bmdma_init(&d->bus[i], &d->bmdma[i], d); d->bmdma[i].bus = &d->bus[i]; ide_register_restart_cb(&d->bus[i]); } + + return 0; } static void pci_piix_ide_realize(PCIDevice *dev, Error **errp) { PCIIDEState *d = PCI_IDE(dev); uint8_t *pci_conf = dev->config; + int rc; pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode @@ -158,7 +166,11 @@ static void pci_piix_ide_realize(PCIDevice *dev, Error **errp) vmstate_register(VMSTATE_IF(dev), 0, &vmstate_ide_pci, d); - pci_piix_init_ports(d); + rc = pci_piix_init_ports(d); + if (rc) { + error_setg_errno(errp, -rc, "Failed to realize %s", + object_get_typename(OBJECT(dev))); + } } int pci_piix3_xen_ide_unplug(DeviceState *dev, bool aux) diff --git a/hw/isa/isa-bus.c b/hw/isa/isa-bus.c index 7820068e6e..cffaa35e9c 100644 --- a/hw/isa/isa-bus.c +++ b/hw/isa/isa-bus.c @@ -131,13 +131,17 @@ void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start) isa_init_ioport(dev, start); } -void isa_register_portio_list(ISADevice *dev, - PortioList *piolist, uint16_t start, - const MemoryRegionPortio *pio_start, - void *opaque, const char *name) +int isa_register_portio_list(ISADevice *dev, + PortioList *piolist, uint16_t start, + const MemoryRegionPortio *pio_start, + void *opaque, const char *name) { assert(piolist && !piolist->owner); + if (!isabus) { + return -ENODEV; + } + /* START is how we should treat DEV, regardless of the actual contents of the portio array. This is how the old code actually handled e.g. the FDC device. */ @@ -145,6 +149,8 @@ void isa_register_portio_list(ISADevice *dev, portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name); portio_list_add(piolist, isabus->address_space_io, start); + + return 0; } static void isa_device_init(Object *obj) diff --git a/include/hw/ide/internal.h b/include/hw/ide/internal.h index 2d09162eeb..79172217cc 100644 --- a/include/hw/ide/internal.h +++ b/include/hw/ide/internal.h @@ -624,7 +624,7 @@ int ide_init_drive(IDEState *s, BlockBackend *blk, IDEDriveKind kind, int chs_trans, Error **errp); void ide_init2(IDEBus *bus, qemu_irq irq); void ide_exit(IDEState *s); -void ide_init_ioport(IDEBus *bus, ISADevice *isa, int iobase, int iobase2); +int ide_init_ioport(IDEBus *bus, ISADevice *isa, int iobase, int iobase2); void ide_register_restart_cb(IDEBus *bus); void ide_exec_cmd(IDEBus *bus, uint32_t val); diff --git a/include/hw/isa/isa.h b/include/hw/isa/isa.h index ddaae89a85..d4417b34b6 100644 --- a/include/hw/isa/isa.h +++ b/include/hw/isa/isa.h @@ -132,12 +132,15 @@ void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start); * @portio: the ports, sorted by offset. * @opaque: passed into the portio callbacks. * @name: passed into memory_region_init_io. + * + * Returns: 0 on success, negative error code otherwise (e.g. if the + * ISA bus is not available) */ -void isa_register_portio_list(ISADevice *dev, - PortioList *piolist, - uint16_t start, - const MemoryRegionPortio *portio, - void *opaque, const char *name); +int isa_register_portio_list(ISADevice *dev, + PortioList *piolist, + uint16_t start, + const MemoryRegionPortio *portio, + void *opaque, const char *name); static inline ISABus *isa_bus_from_device(ISADevice *d) {