linux-kernel - Re: [PATCH 05/13] selftests/nolibc: riscv: customize makefile for rv32

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Date:   Fri, 26 May 2023 08:57:07 +0200
From:   Thomas Weißschuh <thomas@...ch.de>
To:     Zhangjin Wu <falcon@...ylab.org>
Cc:     w@....eu, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-riscv@...ts.infradead.org,
        palmer@...belt.com, paul.walmsley@...ive.com
Subject: Re: [PATCH 05/13] selftests/nolibc: riscv: customize makefile for
 rv32

On 2023-05-25 01:50:57+0800, Zhangjin Wu wrote:
> both riscv64 and riscv32 have the same ARCH value, it is riscv, the
> default defconfig enables 64bit, to support riscv32, let's allow pass
> "ARCH=riscv32" or "ARCH=riscv CONFIG_32BIT=1" to customize riscv32
> setting.

What's the advantage of doing CONFIG_32BIT? For i386/x86_64, arm/arm64
it's not necessary either.
(Let's ignore the "x86" case)

If for riscv the "normal" version is riscv64 then adding a new "riscv32" that
works the same as the other architectures seems nicer and easier.