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: <87v8d1q4on.fsf@all.your.base.are.belong.to.us>
Date:   Sat, 26 Aug 2023 16:06:00 +0200
From:   Björn Töpel <bjorn@...nel.org>
To:     Puranjay Mohan <puranjay12@...il.com>, 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, song@...nel.org,
        yhs@...com, kpsingh@...nel.org, bpf@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     puranjay12@...il.com
Subject: Re: [PATCH bpf-next v2 3/3] bpf, riscv: use prog pack allocator in
 the BPF JIT

Puranjay Mohan <puranjay12@...il.com> writes:

> 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.

General style comment; Please try to use the full 100 characters width
for the patches. You're having a lot of linebreaks, which IMO makes the
patch harder to read.


Björn