From nobody Mon Feb 9 14:50:28 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 ARC-Seal: i=1; a=rsa-sha256; t=1570793321; cv=none; d=zoho.com; s=zohoarc; b=mFnW74m4PKNoyV0Lem0l0T0X/VuoUdkuSWzlq2EgBX4Uv5gsHIV+FnqRxphezX9Ngw11Kcb9GxeBoOi1erI2pDB+PJ8E9uc+1vsF+WSSFwrAZd7uN7c34tsPC/Wxjr/Tqz82HRRxzefNE/7xe9+7+c9647d+bH9Kx6I2z+rgBb4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1570793321; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=6oAgv8ybjWDvsGYH+iuHfrijjMeP3uqbtXoS4uR4TkA=; b=ISA6nswoXmvni1prkfhqSSU8JglXzwu2z6AszZM8E5A8qGS1+Wx13Fj8nSnvRyc97KPgOUZRQoN3TUKwOoKXyEhsRoJ2o8lne5Mo3iSLQwh/5ze3/67U9gi/upRGSqjlILNrGNxBPWM2WxJ37ss939CcnRW2+ND0j78CD34zW2U= ARC-Authentication-Results: i=1; mx.zoho.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 header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1570793321312166.95211690179167; Fri, 11 Oct 2019 04:28:41 -0700 (PDT) Received: from localhost ([::1]:48689 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIt67-0007Bk-9V for importer@patchew.org; Fri, 11 Oct 2019 07:28:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43725) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIszd-0007kW-Ja for qemu-devel@nongnu.org; Fri, 11 Oct 2019 07:21:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIszc-0002R5-DW for qemu-devel@nongnu.org; Fri, 11 Oct 2019 07:21:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57608) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIszc-0002Qd-5U for qemu-devel@nongnu.org; Fri, 11 Oct 2019 07:21:56 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 67E1A1DCD; Fri, 11 Oct 2019 11:21:55 +0000 (UTC) Received: from localhost (dhcp-192-238.str.redhat.com [10.33.192.238]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4DEFB5C1B2; Fri, 11 Oct 2019 11:21:47 +0000 (UTC) From: Jens Freimann To: qemu-devel@nongnu.org Subject: [PATCH v3 10/10] vfio: unplug failover primary device before migration Date: Fri, 11 Oct 2019 13:20:15 +0200 Message-Id: <20191011112015.11785-11-jfreimann@redhat.com> In-Reply-To: <20191011112015.11785-1-jfreimann@redhat.com> References: <20191011112015.11785-1-jfreimann@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.71]); Fri, 11 Oct 2019 11:21:55 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 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: parav@mellanox.com, mst@redhat.com, aadam@redhat.com, dgilbert@redhat.com, alex.williamson@redhat.com, laine@redhat.com, ailan@redhat.com, ehabkost@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" As usual block all vfio-pci devices from being migrated, but make an exception for failover primary devices. This is achieved by setting unmigratable to 0 but also add a migration blocker for all vfio-pci devices except failover primary devices. These will be unplugged before migration happens by the migration handler of the corresponding virtio-net standby device. Signed-off-by: Jens Freimann --- hw/vfio/pci.c | 35 ++++++++++++++++++++++++++++++++++- hw/vfio/pci.h | 2 ++ 2 files changed, 36 insertions(+), 1 deletion(-) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index c5e6fe61cb..64cf8e07d9 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -40,6 +40,9 @@ #include "pci.h" #include "trace.h" #include "qapi/error.h" +#include "migration/blocker.h" +#include "qemu/option.h" +#include "qemu/option_int.h" =20 #define TYPE_VFIO_PCI "vfio-pci" #define PCI_VFIO(obj) OBJECT_CHECK(VFIOPCIDevice, obj, TYPE_VFIO_PCI) @@ -2698,6 +2701,12 @@ static void vfio_unregister_req_notifier(VFIOPCIDevi= ce *vdev) vdev->req_enabled =3D false; } =20 +static int has_net_failover_arg(void *opaque, const char *name, + const char *value, Error **errp) +{ + return (strcmp(name, "net_failover_pair_id") =3D=3D 0); +} + static void vfio_realize(PCIDevice *pdev, Error **errp) { VFIOPCIDevice *vdev =3D PCI_VFIO(pdev); @@ -2710,6 +2719,20 @@ static void vfio_realize(PCIDevice *pdev, Error **er= rp) int groupid; int i, ret; bool is_mdev; + uint16_t class_id; + + if (qemu_opt_foreach(pdev->qdev.opts, has_net_failover_arg, + (void *) pdev->qdev.opts, &err) =3D=3D 0) { + error_setg(&vdev->migration_blocker, + "VFIO device doesn't support migration"); + ret =3D migrate_add_blocker(vdev->migration_blocker, &err); + if (err) { + error_propagate(errp, err); + error_free(vdev->migration_blocker); + } + } else { + pdev->qdev.allow_unplug_during_migration =3D true; + } =20 if (!vdev->vbasedev.sysfsdev) { if (!(~vdev->host.domain || ~vdev->host.bus || @@ -2812,6 +2835,14 @@ static void vfio_realize(PCIDevice *pdev, Error **er= rp) goto error; } =20 + if (vdev->net_failover_pair_id !=3D NULL) { + class_id =3D pci_get_word(pdev->config + PCI_CLASS_DEVICE); + if (class_id !=3D PCI_CLASS_NETWORK_ETHERNET) { + error_setg(errp, "failover device is not an Ethernet device"); + goto error; + } + } + /* vfio emulates a lot for us, but some bits need extra love */ vdev->emulated_config_bits =3D g_malloc0(vdev->config_size); =20 @@ -3110,6 +3141,8 @@ static Property vfio_pci_dev_properties[] =3D { display, ON_OFF_AUTO_OFF), DEFINE_PROP_UINT32("xres", VFIOPCIDevice, display_xres, 0), DEFINE_PROP_UINT32("yres", VFIOPCIDevice, display_yres, 0), + DEFINE_PROP_STRING("net_failover_pair_id", VFIOPCIDevice, + net_failover_pair_id), DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIOPCIDevice, intx.mmap_timeout, 1100), DEFINE_PROP_BIT("x-vga", VFIOPCIDevice, features, @@ -3152,7 +3185,7 @@ static Property vfio_pci_dev_properties[] =3D { =20 static const VMStateDescription vfio_pci_vmstate =3D { .name =3D "vfio-pci", - .unmigratable =3D 1, + .unmigratable =3D 0, }; =20 static void vfio_pci_dev_class_init(ObjectClass *klass, void *data) diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index 834a90d646..da4417071a 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -134,6 +134,7 @@ typedef struct VFIOPCIDevice { PCIHostDeviceAddress host; EventNotifier err_notifier; EventNotifier req_notifier; + char *net_failover_pair_id; int (*resetfn)(struct VFIOPCIDevice *); uint32_t vendor_id; uint32_t device_id; @@ -168,6 +169,7 @@ typedef struct VFIOPCIDevice { bool no_vfio_ioeventfd; bool enable_ramfb; VFIODisplay *dpy; + Error *migration_blocker; } VFIOPCIDevice; =20 uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len); --=20 2.21.0