From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 CD143C352A3 for ; Fri, 7 Feb 2020 09:35:56 +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 9CB6A21741 for ; Fri, 7 Feb 2020 09:35:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="HvqGnXsa" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9CB6A21741 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]:52844 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j003H-000322-Kr for qemu-devel@archiver.kernel.org; Fri, 07 Feb 2020 04:35:55 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:36804) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j001N-0000Fu-6f for qemu-devel@nongnu.org; Fri, 07 Feb 2020 04:33:58 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j001L-00052G-SU for qemu-devel@nongnu.org; Fri, 07 Feb 2020 04:33:57 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:38736 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1j001L-000528-OA for qemu-devel@nongnu.org; Fri, 07 Feb 2020 04:33:55 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1581068035; 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: in-reply-to:in-reply-to:references:references; bh=OGefz2EA1HV37NHec9vsdI9g9mOvinUEycSbUngGOYc=; b=HvqGnXsaySwTjss4NLeycMOYDPkoOcOn54CS4hNv/APn9k740aQujprIXbKWgbhVFiDl+J MUfZPvTqPYCdwbJBOKs7do2Ww77QA/fLlavlnrIb24dUCsumDv6MM6rI+BbG2KynaKKOhL +Way81sVoAYXAQWp9FPtv+Pgj3C0kQI= 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-105-QELBDTiUMZaY7ZbRN7N9sg-1; Fri, 07 Feb 2020 04:33:53 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 252B418A6EC0; Fri, 7 Feb 2020 09:33:52 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-37.ams2.redhat.com [10.36.116.37]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9414D790CF; Fri, 7 Feb 2020 09:33:46 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, jean-philippe@linaro.org, dgilbert@redhat.com, quintela@redhat.com, mst@redhat.com, peterx@redhat.com Subject: [PATCH v14 10/11] virtio-iommu: Support migration Date: Fri, 7 Feb 2020 10:32:02 +0100 Message-Id: <20200207093203.3788-11-eric.auger@redhat.com> In-Reply-To: <20200207093203.3788-1-eric.auger@redhat.com> References: <20200207093203.3788-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-MC-Unique: QELBDTiUMZaY7ZbRN7N9sg-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII 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: 207.211.31.120 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: kevin.tian@intel.com, bharatb.linux@gmail.com, tnowicki@marvell.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add Migration support. We rely on recently added gtree and qlist migration. We only migrate the domain gtree. The endpoint gtree is re-constructed in a post-load operation. Signed-off-by: Eric Auger Acked-by: Peter Xu --- v11 -> v12: - do not migrate the endpoint gtree but reconstruct it from the domain gtree (Peter's suggestion) - add MIG_PRI_IOMMU --- hw/virtio/virtio-iommu.c | 109 +++++++++++++++++++++++++++++++++++---- 1 file changed, 99 insertions(+), 10 deletions(-) diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 997a36e22e..88717c6305 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -643,16 +643,6 @@ static uint64_t virtio_iommu_get_features(VirtIODevice= *vdev, uint64_t f, return f; } =20 -/* - * Migration is not yet supported: most of the state consists - * of balanced binary trees which are not yet ready for getting - * migrated - */ -static const VMStateDescription vmstate_virtio_iommu_device =3D { - .name =3D "virtio-iommu-device", - .unmigratable =3D 1, -}; - static gint int_cmp(gconstpointer a, gconstpointer b, gpointer user_data) { guint ua =3D GPOINTER_TO_UINT(a); @@ -736,9 +726,108 @@ static void virtio_iommu_instance_init(Object *obj) { } =20 +#define VMSTATE_INTERVAL \ +{ \ + .name =3D "interval", \ + .version_id =3D 1, \ + .minimum_version_id =3D 1, \ + .fields =3D (VMStateField[]) { \ + VMSTATE_UINT64(low, VirtIOIOMMUInterval), \ + VMSTATE_UINT64(high, VirtIOIOMMUInterval), \ + VMSTATE_END_OF_LIST() \ + } \ +} + +#define VMSTATE_MAPPING \ +{ \ + .name =3D "mapping", \ + .version_id =3D 1, \ + .minimum_version_id =3D 1, \ + .fields =3D (VMStateField[]) { \ + VMSTATE_UINT64(phys_addr, VirtIOIOMMUMapping),\ + VMSTATE_UINT32(flags, VirtIOIOMMUMapping), \ + VMSTATE_END_OF_LIST() \ + }, \ +} + +static const VMStateDescription vmstate_interval_mapping[2] =3D { + VMSTATE_MAPPING, /* value */ + VMSTATE_INTERVAL /* key */ +}; + +static int domain_preload(void *opaque) +{ + VirtIOIOMMUDomain *domain =3D opaque; + + domain->mappings =3D g_tree_new_full((GCompareDataFunc)interval_cmp, + NULL, g_free, g_free); + return 0; +} + +static const VMStateDescription vmstate_endpoint =3D { + .name =3D "endpoint", + .version_id =3D 1, + .minimum_version_id =3D 1, + .fields =3D (VMStateField[]) { + VMSTATE_UINT32(id, VirtIOIOMMUEndpoint), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_domain =3D { + .name =3D "domain", + .version_id =3D 1, + .minimum_version_id =3D 1, + .pre_load =3D domain_preload, + .fields =3D (VMStateField[]) { + VMSTATE_UINT32(id, VirtIOIOMMUDomain), + VMSTATE_GTREE_V(mappings, VirtIOIOMMUDomain, 1, + vmstate_interval_mapping, + VirtIOIOMMUInterval, VirtIOIOMMUMapping), + VMSTATE_QLIST_V(endpoint_list, VirtIOIOMMUDomain, 1, + vmstate_endpoint, VirtIOIOMMUEndpoint, next), + VMSTATE_END_OF_LIST() + } +}; + +static gboolean reconstruct_endpoints(gpointer key, gpointer value, + gpointer data) +{ + VirtIOIOMMU *s =3D (VirtIOIOMMU *)data; + VirtIOIOMMUDomain *d =3D (VirtIOIOMMUDomain *)value; + VirtIOIOMMUEndpoint *iter; + + QLIST_FOREACH(iter, &d->endpoint_list, next) { + iter->domain =3D d; + g_tree_insert(s->endpoints, GUINT_TO_POINTER(iter->id), iter); + } + return false; /* continue the domain traversal */ +} + +static int iommu_post_load(void *opaque, int version_id) +{ + VirtIOIOMMU *s =3D opaque; + + g_tree_foreach(s->domains, reconstruct_endpoints, s); + return 0; +} + +static const VMStateDescription vmstate_virtio_iommu_device =3D { + .name =3D "virtio-iommu-device", + .minimum_version_id =3D 1, + .version_id =3D 1, + .post_load =3D iommu_post_load, + .fields =3D (VMStateField[]) { + VMSTATE_GTREE_DIRECT_KEY_V(domains, VirtIOIOMMU, 1, + &vmstate_domain, VirtIOIOMMUDomain), + VMSTATE_END_OF_LIST() + }, +}; + static const VMStateDescription vmstate_virtio_iommu =3D { .name =3D "virtio-iommu", .minimum_version_id =3D 1, + .priority =3D MIG_PRI_IOMMU, .version_id =3D 1, .fields =3D (VMStateField[]) { VMSTATE_VIRTIO_DEVICE, --=20 2.20.1