From patchwork Fri Nov 20 18:50:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 11922017 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 B1380C56201 for ; Fri, 20 Nov 2020 19:09:51 +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 2DA6222240 for ; Fri, 20 Nov 2020 19:09:51 +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="X0UqFWHt" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2DA6222240 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]:39880 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kgBn4-0003HZ-28 for qemu-devel@archiver.kernel.org; Fri, 20 Nov 2020 14:09:50 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40918) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kgBX9-0005Ku-HW for qemu-devel@nongnu.org; Fri, 20 Nov 2020 13:53:24 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:35708) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kgBWz-0007Gz-HC for qemu-devel@nongnu.org; Fri, 20 Nov 2020 13:53:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1605898392; 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=Qu8CTJiydQcChlxQWTNmkAEwFHT33IJLluEvEtsX/ss=; b=X0UqFWHt5Y5UpnjR+b0lXwVdmCbdlm94xDVTuttICwnEHuseS3etSoJRxZ0qMMX/nhUPHG V9qfpmvprls5onSjJ+PajPwGl9lprPgYuz3aRhAnmIrBQ021BJr12pNFcPNN81eoYnZXDY MHxjGMuW9MyO5B31HkrAlvmwBtk1paA= 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-458-_JNmgddUNyaRjjXM5pQgFA-1; Fri, 20 Nov 2020 13:53:10 -0500 X-MC-Unique: _JNmgddUNyaRjjXM5pQgFA-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 10C3C8797E8; Fri, 20 Nov 2020 18:53:08 +0000 (UTC) Received: from eperezma.remote.csb (ovpn-112-88.ams2.redhat.com [10.36.112.88]) by smtp.corp.redhat.com (Postfix) with ESMTP id AAD965C1D5; Fri, 20 Nov 2020 18:52:48 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: qemu-devel@nongnu.org Subject: [RFC PATCH 08/27] vhost: Add a flag for software assisted Live Migration Date: Fri, 20 Nov 2020 19:50:46 +0100 Message-Id: <20201120185105.279030-9-eperezma@redhat.com> In-Reply-To: <20201120185105.279030-1-eperezma@redhat.com> References: <20201120185105.279030-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Received-SPF: pass client-ip=63.128.21.124; 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_H4=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, "Michael S. Tsirkin" , Jason Wang , Daniel Daly , virtualization@lists.linux-foundation.org, Liran Alon , Eli Cohen , Nitin Shrivastav , Alex Barba , Christophe Fontaine , Juan Quintela , Lee Ballard , Lars Ganrot , Rob Miller , Stefano Garzarella , Howard Cai , Parav Pandit , vm , Salil Mehta , Stephen Finucane , Xiao W Wang , Sean Mooney , Stefan Hajnoczi , Jim Harford , Dmytro Kazantsev , Siwei Liu , Harpreet Singh Anand , Michael Lilja , Max Gurtovoy Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Eugenio Pérez --- include/hw/virtio/vhost.h | 1 + hw/virtio/vhost.c | 17 +++++++++++++++-- 2 files changed, 16 insertions(+), 2 deletions(-) diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 93cc3f1ae3..ef920a8076 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -84,6 +84,7 @@ struct vhost_dev { uint64_t backend_cap; bool started; bool log_enabled; + bool sw_lm_enabled; uint64_t log_size; VhostShadowVirtqueue *sw_lm_shadow_vq[2]; VirtIOHandleOutput sw_lm_vq_handler; diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index a55b684b5f..1d55e26d45 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -988,11 +988,16 @@ static int vhost_sw_live_migration_start(struct vhost_dev *dev) static int vhost_sw_live_migration_enable(struct vhost_dev *dev, bool enable_lm) { + int r; + if (enable_lm) { - return vhost_sw_live_migration_start(dev); + r = vhost_sw_live_migration_start(dev); } else { - return vhost_sw_live_migration_stop(dev); + r = vhost_sw_live_migration_stop(dev); } + + dev->sw_lm_enabled = enable_lm; + return r; } static void vhost_sw_lm_global_start(MemoryListener *listener) @@ -1466,6 +1471,7 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque, hdev->log = NULL; hdev->log_size = 0; hdev->log_enabled = false; + hdev->sw_lm_enabled = false; hdev->started = false; memory_listener_register(&hdev->memory_listener, &address_space_memory); QLIST_INSERT_HEAD(&vhost_devices, hdev, entry); @@ -1571,6 +1577,13 @@ void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev) BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); int i, r; + if (hdev->sw_lm_enabled) { + /* We've been called after migration is completed, so no need to + disable it again + */ + return; + } + for (i = 0; i < hdev->nvqs; ++i) { r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), hdev->vq_index + i, false);