From nobody Mon Feb 9 06:01:54 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (209.51.188.17 [209.51.188.17]) by mx.zohomail.com with SMTPS id 1549385443379927.7825466107; Tue, 5 Feb 2019 08:50:43 -0800 (PST) Received: from localhost ([127.0.0.1]:34774 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gr3vh-0007qo-Ch for importer@patchew.org; Tue, 05 Feb 2019 11:50:37 -0500 Received: from eggs.gnu.org ([209.51.188.92]:54924) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gr3nU-0001f7-6i for qemu-devel@nongnu.org; Tue, 05 Feb 2019 11:42:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gr3nS-0008BE-5f for qemu-devel@nongnu.org; Tue, 05 Feb 2019 11:42:08 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33044) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gr3nQ-0008AP-7r; Tue, 05 Feb 2019 11:42:04 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E4BE75944A; Tue, 5 Feb 2019 16:42:01 +0000 (UTC) Received: from localhost (dhcp-192-187.str.redhat.com [10.33.192.187]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6D5A7620C4; Tue, 5 Feb 2019 16:42:01 +0000 (UTC) From: Cornelia Huck To: Peter Maydell Date: Tue, 5 Feb 2019 17:41:09 +0100 Message-Id: <20190205164109.25413-11-cohuck@redhat.com> In-Reply-To: <20190205164109.25413-1-cohuck@redhat.com> References: <20190205164109.25413-1-cohuck@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Tue, 05 Feb 2019 16:42:02 +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] [PULL 10/10] s390x/pci: Unplug remaining requested devices on pcihost reset 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: qemu-s390x@nongnu.org, Cornelia Huck , qemu-devel@nongnu.org, David Hildenbrand Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: David Hildenbrand When resetting the guest we should unplug and remove all devices that are still pending. With this patch, the requested device will be unplugged on reboot (S390_RESET_EXTERNAL and S390_RESET_REIPL, which reset the pcihost bridge via qemu_devices_reset()). This approach is similar to what's done for acpi PCI hotplug in acpi_pcihp_reset() -> acpi_pcihp_update() -> acpi_pcihp_update_hotplug_bus() -> acpi_pcihp_eject_slot(). s390_pci_generate_plug_event()'s will still be generated, I guess this is not an issue. The same thing would happen right now when unplugging a device just before starting the guest. Signed-off-by: David Hildenbrand Message-Id: <20190130155733.32742-7-david@redhat.com> Reviewed-by: Collin Walling Signed-off-by: Cornelia Huck --- hw/s390x/s390-pci-bus.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c index 3816fb1f11..80ff1ce33f 100644 --- a/hw/s390x/s390-pci-bus.c +++ b/hw/s390x/s390-pci-bus.c @@ -1093,6 +1093,21 @@ static void s390_pcihost_reset(DeviceState *dev) { S390pciState *s =3D S390_PCI_HOST_BRIDGE(dev); PCIBus *bus =3D s->parent_obj.bus; + S390PCIBusDevice *pbdev, *next; + + /* Process all pending unplug requests */ + QTAILQ_FOREACH_SAFE(pbdev, &s->zpci_devs, link, next) { + if (pbdev->unplug_requested) { + if (pbdev->summary_ind) { + pci_dereg_irqs(pbdev); + } + if (pbdev->iommu->enabled) { + pci_dereg_ioat(pbdev->iommu); + } + pbdev->state =3D ZPCI_FS_STANDBY; + s390_pci_perform_unplug(pbdev); + } + } =20 /* * When resetting a PCI bridge, the assigned numbers are set to 0. So --=20 2.17.2