netdev - Re: [RFC PATCH 01/14] packet: introduce AF

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Message-ID: <CAAsGZS48LzYbY1==CF_i70bD290HyRgb-RUpUZ-TRKftUsNxTA@mail.gmail.com>
Date:   Thu, 16 Nov 2017 19:32:05 -0800
From:   chetan L <loke.chetan@...il.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     Björn Töpel <bjorn.topel@...il.com>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>,
        Alexander Duyck <alexander.h.duyck@...el.com>,
        Alexander Duyck <alexander.duyck@...il.com>,
        John Fastabend <john.fastabend@...il.com>,
        Alexei Starovoitov <ast@...com>,
        michael.lundkvist@...csson.com, ravineet.singh@...csson.com,
        Daniel Borkmann <daniel@...earbox.net>,
        Network Development <netdev@...r.kernel.org>,
        Björn Töpel <bjorn.topel@...el.com>,
        jesse.brandeburg@...el.com, anjali.singhai@...el.com,
        rami.rosen@...el.com, jeffrey.b.shaw@...el.com,
        ferruh.yigit@...el.com, qi.z.zhang@...el.com
Subject: Re: [RFC PATCH 01/14] packet: introduce AF_PACKET V4 userspace API

On Thu, Nov 16, 2017 at 8:53 AM, Jesper Dangaard Brouer
<brouer@...hat.com> wrote:
> On Wed, 15 Nov 2017 14:21:38 -0800
> chet l <loke.chetan@...il.com> wrote:
>
>> One quick question:
>> Any thoughts on SVM support?
>
> What is SVM ?
>

Shared Virtual Memory(PCIe based). So going back to one of your
mapping examples. The protocol can be AF_CHANNEL.
Modes could be:
AF_ZC , AF_XDP_REDIRECT

Mapping types could be:
AF_NON_SVM(current setup - no PASID needed), AF_SVM(onus is on the
user to pass the PASID as part of the setsockopt), AF_SVM++


Chetan