linux-kernel - Re: [PATCH v2 3/3] riscv: configs: Add nommu defconfig for RV32

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Message-ID: <cd0faa52-fda9-7b8b-7ce1-8ad33236c430@gmail.com>
Date:   Mon, 13 Feb 2023 16:44:29 -0500
From:   Jesse Taube <mr.bossman075@...il.com>
To:     Conor Dooley <conor@...nel.org>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Yimin Gu <ustcymgu@...il.com>,
        Waldemar Brodkorb <wbx@...nadk.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>
Subject: Re: [PATCH v2 3/3] riscv: configs: Add nommu defconfig for RV32



On 2/13/23 14:49, Conor Dooley wrote:
> Hey Jesse,
> 
> On Sun, Feb 12, 2023 at 03:55:06PM -0500, Jesse Taube wrote:
>> 32bit risc-v can be configured to run without MMU. This patch adds
>> an example configuration for RV32 nommu virtual machine.
> 
> There's a patch on the list (I think it came in after you sent v1) that
> pointed out that the rv32_defconfig in the tree is not actually used if
> you do `make ARCH=riscv rv32_defconfig`, but instead a make target is
> used. 
Oh that's interesting. Why is it still int the tree?
How would you feel about replacing this final patch with the
> below? That way rv32_nommu_virt_defconfig would always be kept in sync
> with the rv64 version.
Sounds good! The only gripe I have is the nommu_virt_defconfig is not 
very minimal, but that's not my problem.

Thanks,
Jesse Taube
> 
> Cheers,
> Conor.
> 
> diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
> index 7123511d977c..785d438ae5fe 100644
> --- a/arch/riscv/Makefile
> +++ b/arch/riscv/Makefile
> @@ -173,3 +173,7 @@ rv64_randconfig:
>   PHONY += rv32_defconfig
>   rv32_defconfig:
>   	$(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config
> +
> +PHONY += rv32_nommu_virt_defconfig
> +rv32_nommu_virt_defconfig:
> +	$(Q)$(MAKE) -f $(srctree)/Makefile nommu_virt_defconfig 32-bit.config
>