linux-kernel - Re: [PATCH bpf-next v3 3/3] bpf, arm64: use bpf_jit_binary_pack

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Message-ID: <CAPhsuW7FHYpccw-YRK6ka_EX8pVDuHvhvT0myLhZOkrGjJ6=Ng@mail.gmail.com>
Date:   Tue, 20 Jun 2023 16:24:59 -0700
From:   Song Liu <song@...nel.org>
To:     Puranjay Mohan <puranjay12@...il.com>
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        martin.lau@...ux.dev, catalin.marinas@....com,
        mark.rutland@....com, bpf@...r.kernel.org, kpsingh@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next v3 3/3] bpf, arm64: use bpf_jit_binary_pack_alloc

On Mon, Jun 19, 2023 at 3:01 AM Puranjay Mohan <puranjay12@...il.com> wrote:
>
> Use bpf_jit_binary_pack_alloc for memory management of JIT binaries in
> ARM64 BPF JIT. The bpf_jit_binary_pack_alloc creates a pair of RW and RX
> buffers. The JIT writes the program into the RW buffer. When the JIT is
> done, the program is copied to the final RX buffer
> with bpf_jit_binary_pack_finalize.
>
> Implement bpf_arch_text_copy() and bpf_arch_text_invalidate() for ARM64
> JIT as these functions are required by bpf_jit_binary_pack allocator.
>
> Signed-off-by: Puranjay Mohan <puranjay12@...il.com>

LGTM! Thanks!

Acked-by: Song Liu <song@...nel.org>