From nobody Mon Feb 9 19:52:10 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1676484339; cv=none; d=zohomail.com; s=zohoarc; b=Oa432VKLzAQ/Kuz20W2wF2ncvYK+BOzbuf8n/fzhYTkx47b2giueEx7IxKpDLQZjWx7Wu9BuwraXY7Z46apk2tsvEO5+yTKbJ65yh86Er99jknbpTYBeU80htnGtf/Mp6KD/78r0SvUVS21iPOq75abqC3s6TDQpRqMEOna5JSY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1676484339; h=Content-Type: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=KsmVepERaqequSlE7Ur8f0K0Vum9v+5eQxFNg0Nb1f4=; b=hV8EWNM8oGetda0e1V2dbigeGQqAfJGdB2xQtykY07C9XWSnZ4MpGv/j1lS86qegL4Z5+5nWdoReijyMGEJq/ldGmgSaOa59VluLQwFepbQr8CXZegD/QWp5v1k87SnFz5M3nWW3KxttQrPVWOVwrgKdWYiDXLtiEQeHbN2s5pA= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1676484339916458.4111138865561; Wed, 15 Feb 2023 10:05:39 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pSLkv-0007iQ-Nv; Wed, 15 Feb 2023 12:39:45 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pSLku-0007hm-Gm for qemu-devel@nongnu.org; Wed, 15 Feb 2023 12:39:44 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pSLkt-0005tC-2n for qemu-devel@nongnu.org; Wed, 15 Feb 2023 12:39:44 -0500 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-671-kH0QAkMrOvihIxQwPIAiww-1; Wed, 15 Feb 2023 12:39:38 -0500 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E02F618E0921; Wed, 15 Feb 2023 17:39:37 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.155]) by smtp.corp.redhat.com (Postfix) with ESMTP id 90432140EBF4; Wed, 15 Feb 2023 17:39:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1676482782; 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=KsmVepERaqequSlE7Ur8f0K0Vum9v+5eQxFNg0Nb1f4=; b=WXejWHZOpJ4sSadV6pl1L9vd3UBP1376E+Lu2GgxfL+xJUgk48pIZDfnjcNus57O7TJJo/ rI0KvhjkNinaT4W95dmsU/diQYmgdHZu7/2Ttxm2dnTcLMN7yYNLnqqdduZgVhe7ZNtiyY mcwpiKbu36aCkTwT58ukRfQAH3VqOjg= X-MC-Unique: kH0QAkMrOvihIxQwPIAiww-1 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Cindy Lu , Shannon Nelson , longpeng2@huawei.com, virtualization@lists.linux-foundation.org, Harpreet Singh Anand , si-wei.liu@oracle.com, Stefan Hajnoczi , Eli Cohen , "Michael S. Tsirkin" , Gautam Dawar , Laurent Vivier , Liuxiangdong , alvaro.karsz@solid-run.com, Parav Pandit , Stefano Garzarella , Jason Wang , Zhu Lingshan , "Gonglei (Arei)" , Lei Yang Subject: [PATCH v3 12/14] vdpa: block migration if dev does not have _F_SUSPEND Date: Wed, 15 Feb 2023 18:38:48 +0100 Message-Id: <20230215173850.298832-13-eperezma@redhat.com> In-Reply-To: <20230215173850.298832-1-eperezma@redhat.com> References: <20230215173850.298832-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=170.10.129.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1676484342087100003 Next patches enable devices to be migrated even if vdpa netdev has not been started with x-svq. However, not all devices are migratable, so we need to block migration if we detect that. Block vhost-vdpa device migration if it does not offer _F_SUSPEND and it has not been started with x-svq. Signed-off-by: Eugenio P=C3=A9rez --- hw/virtio/vhost-vdpa.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 52c72e7c94..3a85f9f1ed 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -443,6 +443,27 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void= *opaque, Error **errp) return 0; } =20 + /* + * If dev->shadow_vqs_enabled at initialization that means the device = has + * been started with x-svq=3Don, so don't block migration + */ + if (dev->migration_blocker =3D=3D NULL && !v->shadow_vqs_enabled) { + uint64_t backend_features; + + /* We don't have dev->backend_features yet */ + ret =3D vhost_vdpa_call(dev, VHOST_GET_BACKEND_FEATURES, + &backend_features); + if (unlikely(ret)) { + error_setg_errno(errp, -ret, "Could not get backend features"); + return ret; + } + + if (!(backend_features & BIT_ULL(VHOST_BACKEND_F_SUSPEND))) { + error_setg(&dev->migration_blocker, + "vhost-vdpa backend lacks VHOST_BACKEND_F_SUSPEND feature.= "); + } + } + /* * Similar to VFIO, we end up pinning all guest memory and have to * disable discarding of RAM. --=20 2.31.1