linux-kernel - Re: [PATCH bpf-next v2 3/3] bpf, riscv: use prog pack allocator in the BPF JIT

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Message-ID: <CAPhsuW4hfBMvB9DzM=ZCnq5Bz-bpFTP1gBujyEN7NxdsXnnceA@mail.gmail.com>
Date:   Thu, 24 Aug 2023 15:19:06 -0700
From:   Song Liu <song@...nel.org>
To:     Puranjay Mohan <puranjay12@...il.com>
Cc:     paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, pulehui@...wei.com,
        conor.dooley@...rochip.com, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, martin.lau@...ux.dev, yhs@...com,
        kpsingh@...nel.org, bjorn@...nel.org, bpf@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next v2 3/3] bpf, riscv: use prog pack allocator in
 the BPF JIT

On Thu, Aug 24, 2023 at 6:31 AM Puranjay Mohan <puranjay12@...il.com> wrote:
>
> Use bpf_jit_binary_pack_alloc() for memory management of JIT binaries in
> RISCV 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 RISCV
> JIT as these functions are required by bpf_jit_binary_pack allocator.
>
> Signed-off-by: Puranjay Mohan <puranjay12@...il.com>

LGTM.

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

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