linux-kernel - Re: [RFC PATCH bpf-next 1/3] arm64: insn: Fix two bugs in encoding 32-bit logical immediates

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Message-ID: <CAB-e3NQLuaHLxNB3Zpgy8EqyiZBqEYGzh1TSzXQe++nqPu2oLg@mail.gmail.com>
Date:   Fri, 8 May 2020 11:12:12 -0700
From:   Luke Nelson <luke.r.nels@...il.com>
To:     Will Deacon <will@...nel.org>
Cc:     Marc Zyngier <maz@...nel.org>,
        Luke Nelson <lukenels@...washington.edu>,
        bpf <bpf@...r.kernel.org>, Xi Wang <xi.wang@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Zi Shen Lim <zlim.lnx@...il.com>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arm-kernel@...ts.infradead.org,
        open list <linux-kernel@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>,
        clang-built-linux@...glegroups.com
Subject: Re: [RFC PATCH bpf-next 1/3] arm64: insn: Fix two bugs in encoding
 32-bit logical immediates

Hi Will,

On Fri, May 8, 2020 at 4:47 AM Will Deacon <will@...nel.org> wrote:
>
> Yes, please! And please include Daniel's acks on the BPF changes too. It's a
> public holiday here in the UK today, but I can pick this up next week.

Thanks!

> Nice! Two things:
>
> (1) I really think you should give a talk on this at a Linux conference

That would be great, I'd be happy to give a talk on our verification
work some time in the future :)

> (2) Did you look at any instruction generation functions other than the
>     logical immediate encoding function?

Other instruction generation functions are on our todo list, but we
haven't got a chance to spend more time on them yet.

Thanks again,

- Luke