From patchwork Tue Jun 14 07:19:33 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcel Apfelbaum X-Patchwork-Id: 9175109 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 05FE86075D for ; Tue, 14 Jun 2016 07:20:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CD36B26861 for ; Tue, 14 Jun 2016 07:20:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C16FB281DB; Tue, 14 Jun 2016 07:20:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5EAF626861 for ; Tue, 14 Jun 2016 07:20:22 +0000 (UTC) Received: from localhost ([::1]:33100 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bCie5-0004sd-G8 for patchwork-qemu-devel@patchwork.kernel.org; Tue, 14 Jun 2016 03:20:21 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51207) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bCidc-0004mA-04 for qemu-devel@nongnu.org; Tue, 14 Jun 2016 03:19:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bCidV-0004Vj-P6 for qemu-devel@nongnu.org; Tue, 14 Jun 2016 03:19:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39227) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bCidV-0004Vd-75 for qemu-devel@nongnu.org; Tue, 14 Jun 2016 03:19:45 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AE5103B720; Tue, 14 Jun 2016 07:19:44 +0000 (UTC) Received: from work.redhat.com (vpn-200-162.tlv.redhat.com [10.35.200.162]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u5E7Jag6023411; Tue, 14 Jun 2016 03:19:41 -0400 From: Marcel Apfelbaum To: qemu-devel@nongnu.org Date: Tue, 14 Jun 2016 10:19:33 +0300 Message-Id: <1465888776-25985-2-git-send-email-marcel@redhat.com> In-Reply-To: <1465888776-25985-1-git-send-email-marcel@redhat.com> References: <1465888776-25985-1-git-send-email-marcel@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 14 Jun 2016 07:19:44 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v4 1/4] hw/pci: delay bus_master_enable_region initialization X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ehabkost@redhat.com, mst@redhat.com, bd.aviv@gmail.com, armbru@redhat.com, peterx@redhat.com, alex.williamson@redhat.com, jan.kiszka@web.de, marcel@redhat.com, pbonzini@redhat.com, davidkiarie4@gmail.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Skip bus_master_enable region creation on PCI device init in order to be sure the IOMMU device (if present) would be created in advance. Add this memory region at machine_done time. Signed-off-by: Marcel Apfelbaum --- hw/pci/pci.c | 41 ++++++++++++++++++++++++++++++++--------- include/hw/pci/pci_bus.h | 2 ++ include/sysemu/sysemu.h | 1 + vl.c | 5 +++++ 4 files changed, 40 insertions(+), 9 deletions(-) diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 4b585f4..ee385eb 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -78,10 +78,37 @@ static const VMStateDescription vmstate_pcibus = { } }; +static void pci_init_bus_master(PCIDevice *pci_dev) +{ + AddressSpace *dma_as = pci_device_iommu_address_space(pci_dev); + + memory_region_init_alias(&pci_dev->bus_master_enable_region, + OBJECT(pci_dev), "bus master", + dma_as->root, 0, memory_region_size(dma_as->root)); + memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); + address_space_init(&pci_dev->bus_master_as, + &pci_dev->bus_master_enable_region, pci_dev->name); +} + +static void pcibus_machine_done(Notifier *notifier, void *data) +{ + PCIBus *bus = container_of(notifier, PCIBus, machine_done); + int i; + + for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { + if (bus->devices[i]) { + pci_init_bus_master(bus->devices[i]); + } + } +} + static void pci_bus_realize(BusState *qbus, Error **errp) { PCIBus *bus = PCI_BUS(qbus); + bus->machine_done.notify = pcibus_machine_done; + qemu_add_machine_init_done_notifier(&bus->machine_done); + vmstate_register(NULL, -1, &vmstate_pcibus, bus); } @@ -89,6 +116,8 @@ static void pci_bus_unrealize(BusState *qbus, Error **errp) { PCIBus *bus = PCI_BUS(qbus); + qemu_remove_machine_init_done_notifier(&bus->machine_done); + vmstate_unregister(NULL, &vmstate_pcibus, bus); } @@ -920,7 +949,6 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, PCIConfigReadFunc *config_read = pc->config_read; PCIConfigWriteFunc *config_write = pc->config_write; Error *local_err = NULL; - AddressSpace *dma_as; DeviceState *dev = DEVICE(pci_dev); pci_dev->bus = bus; @@ -961,15 +989,10 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, pci_dev->devfn = devfn; pci_dev->requester_id_cache = pci_req_id_cache_get(pci_dev); - dma_as = pci_device_iommu_address_space(pci_dev); - - memory_region_init_alias(&pci_dev->bus_master_enable_region, - OBJECT(pci_dev), "bus master", - dma_as->root, 0, memory_region_size(dma_as->root)); - memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); - address_space_init(&pci_dev->bus_master_as, &pci_dev->bus_master_enable_region, - name); + if (qdev_hotplug) { + pci_init_bus_master(pci_dev); + } pstrcpy(pci_dev->name, sizeof(pci_dev->name), name); pci_dev->irq_state = 0; pci_config_alloc(pci_dev); diff --git a/include/hw/pci/pci_bus.h b/include/hw/pci/pci_bus.h index 403fec6..5484a9b 100644 --- a/include/hw/pci/pci_bus.h +++ b/include/hw/pci/pci_bus.h @@ -39,6 +39,8 @@ struct PCIBus { Keep a count of the number of devices with raised IRQs. */ int nirq; int *irq_count; + + Notifier machine_done; }; typedef struct PCIBridgeWindows PCIBridgeWindows; diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h index 9428141..604ec31 100644 --- a/include/sysemu/sysemu.h +++ b/include/sysemu/sysemu.h @@ -75,6 +75,7 @@ void qemu_add_exit_notifier(Notifier *notify); void qemu_remove_exit_notifier(Notifier *notify); void qemu_add_machine_init_done_notifier(Notifier *notify); +void qemu_remove_machine_init_done_notifier(Notifier *notify); void hmp_savevm(Monitor *mon, const QDict *qdict); int load_vmstate(const char *name); diff --git a/vl.c b/vl.c index 2f74fe8..6eb7245 100644 --- a/vl.c +++ b/vl.c @@ -2704,6 +2704,11 @@ void qemu_add_machine_init_done_notifier(Notifier *notify) } } +void qemu_remove_machine_init_done_notifier(Notifier *notify) +{ + notifier_remove(notify); +} + static void qemu_run_machine_init_done_notifiers(void) { notifier_list_notify(&machine_init_done_notifiers, NULL);