From nobody Sun Feb 8 22:34:45 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; 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=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1605899397; cv=none; d=zohomail.com; s=zohoarc; b=kd156p+cIXcT+TRxuC5C0KdECSTucXLp7DTlMAydlOBgv320uq/geZGuDDoipDb+tLehWpX22xpFDrBcxFR/Mt7MzxyPTnfqoQ+NErMYBE+Eenzr27/QG2jqqqIyIYSanYfGB9fa7RWTOWSP4AteBLVnkkh7Vnj9y045s5hllI0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1605899397; 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=Qu8CTJiydQcChlxQWTNmkAEwFHT33IJLluEvEtsX/ss=; b=hIDXXKI01HzP2h/Tlb+dBX4Y7155TEbEQp32zQ8XUOleSfroVng1dWGBP1+jAYPwn8tt7Tmivrk8ntGsAlb+0tk/EzXGyatjNpT9q0nUI+YhBsao4gt5ADhEU5E6RnyLUlmzg7yK6Bg/SRDigCJxJh/6WUy2Itm2MiqyBny2FW4= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; 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=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 1605899397007830.3006748125434; Fri, 20 Nov 2020 11:09:57 -0800 (PST) Received: from localhost ([::1]:39880 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kgBn7-0003HZ-UY for importer@patchew.org; Fri, 20 Nov 2020 14:09:53 -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 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 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) 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= X-MC-Unique: _JNmgddUNyaRjjXM5pQgFA-1 From: =?UTF-8?q?Eugenio=20P=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 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 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=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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Signed-off-by: Eugenio P=C3=A9rez --- 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 =3D vhost_sw_live_migration_start(dev); } else { - return vhost_sw_live_migration_stop(dev); + r =3D vhost_sw_live_migration_stop(dev); } + + dev->sw_lm_enabled =3D enable_lm; + return r; } =20 static void vhost_sw_lm_global_start(MemoryListener *listener) @@ -1466,6 +1471,7 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaq= ue, hdev->log =3D NULL; hdev->log_size =3D 0; hdev->log_enabled =3D false; + hdev->sw_lm_enabled =3D false; hdev->started =3D 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 *h= dev, VirtIODevice *vdev) BusState *qbus =3D BUS(qdev_get_parent_bus(DEVICE(vdev))); int i, r; =20 + if (hdev->sw_lm_enabled) { + /* We've been called after migration is completed, so no need to + disable it again + */ + return; + } + for (i =3D 0; i < hdev->nvqs; ++i) { r =3D virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), hdev->vq_inde= x + i, false); --=20 2.18.4