netdev - Re: [RFC net-next 00/18] virtio

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Message-ID: <c5d567f9-9926-8fbb-5bc7-9cccca658108@redhat.com>
Date:   Mon, 2 Dec 2019 10:48:07 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     David Ahern <dsahern@...il.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     Song Liu <songliubraving@...com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        "Michael S . Tsirkin" <mst@...hat.com>, qemu-devel@...gnu.org,
        netdev@...r.kernel.org, John Fastabend <john.fastabend@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Prashant Bhole <prashantbhole.linux@...il.com>,
        kvm@...r.kernel.org, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [RFC net-next 00/18] virtio_net XDP offload


On 2019/12/2 上午12:54, 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.  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 
filter out the unsupported helpers there.

Thanks


>