linux-kernel - Re: [PATCH bpf-next v6 00/23] Introduce eBPF support for HID devices

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Date:   Fri, 15 Jul 2022 19:34:32 +0200
From:   Kumar Kartikeya Dwivedi <memxor@...il.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Jiri Kosina <jikos@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Shuah Khan <shuah@...nel.org>,
        Dave Marchevsky <davemarchevsky@...com>,
        Joe Stringer <joe@...ium.io>, Jonathan Corbet <corbet@....net>,
        Tero Kristo <tero.kristo@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH bpf-next v6 00/23] Introduce eBPF support for HID devices

On Thu, 14 Jul 2022 at 23:39, Alexei Starovoitov
<alexei.starovoitov@...il.com> wrote:
>
> On Tue, Jul 12, 2022 at 04:58:27PM +0200, Benjamin Tissoires wrote:
> > Hi,
> >
> > and after a little bit of time, here comes the v6 of the HID-BPF series.
> >
> > Again, for a full explanation of HID-BPF, please refer to the last patch
> > in this series (23/23).
> >
> > This version sees some improvements compared to v5 on top of the
> > usual addressing of the previous comments:
> > - now I think every eBPF core change has a matching selftest added
> > - the kfuncs declared in syscall can now actually access the memory of
> >   the context
> > - the code to retrieve the BTF ID of the various HID hooks is much
> >   simpler (just a plain use of the BTF_ID() API instead of
> >   loading/unloading of a tracing program)
> > - I also added my HID Surface Dial example that I use locally to provide
> >   a fuller example to users
>
> Looking great.
> Before another respin to address bits in patch 12 let's land the first ~8 patches,
> since they're generic useful improvements.
>
> Kumar, could you please help review the verifier bits?

Sure, I'll take a look.