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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id E523BC43217 for ; Wed, 19 Oct 2022 13:02:30 +0000 (UTC) Received: from localhost ([::1]:53160 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ol8iL-0001v0-CD for qemu-devel@archiver.kernel.org; Wed, 19 Oct 2022 09:02:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36424) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ol8Yg-0005tw-6w for qemu-devel@nongnu.org; Wed, 19 Oct 2022 08:52:30 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:33105) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ol8Yd-0002Gc-17 for qemu-devel@nongnu.org; Wed, 19 Oct 2022 08:52:29 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666183945; 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; bh=yu6+ZMnyRMzz8DCissTykVrm3bd+EJbtvyNtvffS1zE=; b=AbIFMwVeOnMCHQ1c5OPuihxX+M4993JdIrd9pGcthLyKFAVemG6JLh2TuSXNtFIyDJbeTH zNVBromN4mM+zeUMVK3kwPuLlqemRHbKk0TDNuBqlwavmihym6YzIyPeCrG29GQhpM069D HEyTVJS87CD7buxmO9IBEQwSvqFROXo= 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-219-MemkbNqIPke_eZwCzC7uFA-1; Wed, 19 Oct 2022 08:52:18 -0400 X-MC-Unique: MemkbNqIPke_eZwCzC7uFA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id D5137185A792; Wed, 19 Oct 2022 12:52:17 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.14]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7224E4081B60; Wed, 19 Oct 2022 12:52:15 +0000 (UTC) From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Zhu Lingshan , Harpreet Singh Anand , Stefano Garzarella , Si-Wei Liu , Jason Wang , "Michael S. Tsirkin" , Cindy Lu , Laurent Vivier , Eli Cohen , Liuxiangdong , Parav Pandit , Gautam Dawar Subject: [RFC PATCH v2 0/8] Guest announce feature emulation using Shadow VirtQueue Date: Wed, 19 Oct 2022 14:52:02 +0200 Message-Id: <20221019125210.226291-1-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 10.11.54.2 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: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.256, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" A gratuitous ARP is recommended after a live migration to reduce the amount= of=0D time needed by the network links to be aware of the new location. A hypervi= sor=0D may not have the knowledge of the guest network configuration, and this is= =0D especially true on passthrough devices, so its simpler to ask the guest to= =0D do it.=0D =0D However, the device control part of this feature can be totally emulated by= =0D qemu and shadow virtqueue, not needing any special feature from the actual= =0D vdpa device.=0D =0D VIRTIO_NET_F_STATUS is also needed for the guest to access the status of=0D virtio net config where announcement status bit is set. Emulating it as=0D always active in case backend does not support it.=0D =0D v2:=0D * Add VIRTIO_NET_F_STATUS emulation.=0D =0D Eugenio P=C3=A9rez (8):=0D vdpa: Delete duplicated vdpa_feature_bits entry=0D vdpa: Save emulated features list in vhost_vdpa=0D vhost_net: Emulate link state up if backend doesn't expose it=0D vdpa: Expose VIRTIO_NET_F_STATUS unconditionally=0D vdpa: Remove shadow CVQ command check=0D vdpa: handle VIRTIO_NET_CTRL_ANNOUNCE in=0D vhost_vdpa_net_handle_ctrl_avail=0D vhost_net: return VIRTIO_NET_S_ANNOUNCE is device model has it set=0D vdpa: Offer VIRTIO_NET_F_GUEST_ANNOUNCE feature if SVQ is enabled=0D =0D include/hw/virtio/vhost-vdpa.h | 2 +=0D hw/net/vhost_net.c | 35 +++++++++++++++-=0D hw/virtio/vhost-vdpa.c | 8 ++--=0D net/vhost-vdpa.c | 74 ++++++++++------------------------=0D 4 files changed, 62 insertions(+), 57 deletions(-)=0D =0D -- =0D 2.31.1=0D =0D