netdev - Re: [PATCH bpf-next v3 1/3] bpf, arm64: enable kfunc call

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Date:   Fri, 4 Feb 2022 16:42:03 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Hou Tao <hotforest@...il.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andrii@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        netdev@...r.kernel.org, bpf@...r.kernel.org, houtao1@...wei.com,
        Zi Shen Lim <zlim.lnx@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Ard Biesheuvel <ard.biesheuvel@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH bpf-next v3 1/3] bpf, arm64: enable kfunc call

On 1/30/22 10:29 AM, Hou Tao wrote:
> From: Hou Tao <houtao1@...wei.com>
> 
> Since commit b2eed9b58811 ("arm64/kernel: kaslr: reduce module
> randomization range to 2 GB"), for arm64 whether KASLR is enabled
> or not, the module is placed within 2GB of the kernel region, so
> s32 in bpf_kfunc_desc is sufficient to represente the offset of
> module function relative to __bpf_call_base. The only thing needed
> is to override bpf_jit_supports_kfunc_call().
> 
> Signed-off-by: Hou Tao <houtao1@...wei.com>

Could you rebase patch 2 & 3 and resend as they don't apply to bpf-next
right now. Meanwhile, applied this one, thanks a lot!