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 D3362C433FE for ; Tue, 18 Oct 2022 16:15:56 +0000 (UTC) Received: from localhost ([::1]:37938 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1okpFl-00085m-P8 for qemu-devel@archiver.kernel.org; Tue, 18 Oct 2022 12:15:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37160) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1okouw-0003uO-AU for qemu-devel@nongnu.org; Tue, 18 Oct 2022 11:54:11 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:52406) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1okout-00041b-NS for qemu-devel@nongnu.org; Tue, 18 Oct 2022 11:54:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666108443; 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=IxB0BTeh3hMu7aNmM5INY0/5ds3iOeAsqOuJwU1wl/U=; b=cP64VdjPt2xCb951EEHPS15q3xgaZjLcl5cbtR2ft+96RvOoLadD4H1gTWNVNwPLZ3+V0e WJbpzwJdxvbaFmziEjPKTs4dPs3XhM1IgEVR3cz1EbguUHQCB4rjmJ3ndLyCXDFGn1lwAi bbIY/Fpuw35X8Kkqu+ACauZtdkknqzQ= 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-639-pJ2EEKG2Mjq_lPjLMo86mg-1; Tue, 18 Oct 2022 11:54:00 -0400 X-MC-Unique: pJ2EEKG2Mjq_lPjLMo86mg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2E66C101E985; Tue, 18 Oct 2022 15:53:33 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.178]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7773C2166BAD; Tue, 18 Oct 2022 15:53:24 +0000 (UTC) From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Si-Wei Liu , Laurent Vivier , Eli Cohen , Gautam Dawar , "Michael S. Tsirkin" , Zhu Lingshan , Harpreet Singh Anand , Liuxiangdong , Cindy Lu , Parav Pandit , Stefano Garzarella , Jason Wang Subject: [RFC PATCH 0/5] Guest announce feature emulation using Shadow VirtQueue Date: Tue, 18 Oct 2022 17:53:16 +0200 Message-Id: <20221018155321.145135-1-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 10.11.54.6 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: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 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_LOW=-0.7, 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 Sending as RFC for the moment as VIRTIO_NET_F_STATUS is also needed for the= =0D guest to access the status of virtio net config to check if an announcement= =0D is needed.=0D =0D Eugenio P=C3=A9rez (5):=0D vdpa: Save emulated features list in vhost_vdpa=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 | 30 ++++++++++++++-=0D hw/virtio/vhost-vdpa.c | 8 ++--=0D net/vhost-vdpa.c | 70 +++++++++-------------------------=0D 4 files changed, 54 insertions(+), 56 deletions(-)=0D =0D -- =0D 2.31.1=0D =0D