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 X-Spam-Level: X-Spam-Status: No, score=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 5739EC432C0 for ; Mon, 2 Dec 2019 02:48:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2AA3320881 for ; Mon, 2 Dec 2019 02:48:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="d4pNHGee" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727408AbfLBCsZ (ORCPT ); Sun, 1 Dec 2019 21:48:25 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:51533 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727308AbfLBCsZ (ORCPT ); Sun, 1 Dec 2019 21:48:25 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1575254904; 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=eh/9LsFVVQglnm+8EHAX4r6c+/8Racl9Vyp+86QvbXA=; b=d4pNHGeebLPpDfnP6f9a3TtB5btRk3Q0Cf2Knhu8vyNcdVyMcpfUnZhf+2BLdnpkg/JSVp sAzUyUx45LvYUSFPUnQj8lvDN8VqCVrmwQMPYwSF9Xd4eW7iLCfdDP2R3lf9+JRau03iDj f80SJt1D5hAUVj6pwsqIMPjyCR9D17A= 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-125-fJPv4qOmNWG83CNuMLfuMA-1; Sun, 01 Dec 2019 21:48:21 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C59FA107ACC5; Mon, 2 Dec 2019 02:48:18 +0000 (UTC) Received: from [10.72.12.226] (ovpn-12-226.pek2.redhat.com [10.72.12.226]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9017B5D9CA; Mon, 2 Dec 2019 02:48:08 +0000 (UTC) Subject: Re: [RFC net-next 00/18] virtio_net XDP offload To: David Ahern , Alexei Starovoitov , Jakub Kicinski Cc: Song Liu , Jesper Dangaard Brouer , Daniel Borkmann , "Michael S . Tsirkin" , qemu-devel@nongnu.org, netdev@vger.kernel.org, John Fastabend , Alexei Starovoitov , Martin KaFai Lau , Prashant Bhole , kvm@vger.kernel.org, Yonghong Song , Andrii Nakryiko , "David S . Miller" References: <20191126100744.5083-1-prashantbhole.linux@gmail.com> <20191126123514.3bdf6d6f@cakuba.netronome.com> <20191128033255.r66d4zedmhudeaa6@ast-mbp.dhcp.thefacebook.com> <0aa6a69a-0bbe-e0fc-1e18-2114adb18c51@gmail.com> From: Jason Wang Message-ID: Date: Mon, 2 Dec 2019 10:48:07 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <0aa6a69a-0bbe-e0fc-1e18-2114adb18c51@gmail.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-MC-Unique: fJPv4qOmNWG83CNuMLfuMA-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 2019/12/2 =E4=B8=8A=E5=8D=8812:54, David Ahern wrote: > On 11/27/19 10:18 PM, Jason Wang wrote: >> We try to follow what NFP did by starting from a fraction of the whole >> eBPF features. It would be very hard to have all eBPF features >> implemented from the start.=C2=A0 It would be helpful to clarify what's = the >> minimal set of features that you want to have from the start. > Offloading guest programs needs to prevent a guest XDP program from > running bpf helpers that access host kernel data. e.g., bpf_fib_lookup Right, so we probably need a new type of eBPF program on the host and=20 filter out the unsupported helpers there. Thanks >