linux-kernel - Re: [PATCH v1 2/2] riscv: configs: Add nommu decfconfig for RV32

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Message-ID: <Y8pLR7CUad2eLe+A@wendy>
Date:   Fri, 20 Jan 2023 08:05:27 +0000
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Jesse Taube <mr.bossman075@...il.com>
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 v1 2/2] riscv: configs: Add nommu decfconfig for RV32

Hey Jesse,

Same here w/ a single nit.
I'll leave judging whether supporting rv32 nommu is worthwhile to others!

On Thu, Jan 19, 2023 at 12:26:42AM -0500, Jesse Taube wrote:
> riscv: configs: Add nommu decfconfig for RV32

typo: defconfig

Thanks,
Conor.

> 32bit risc-v can be configured to run without MMU. This patch adds
> an example configuration for RV32 nommu virtual machine.
> 
> Signed-off-by: Jesse Taube <Mr.Bossman075@...il.com>
> Cc: Yimin Gu <ustcymgu@...il.com>
> ---
>  arch/riscv/configs/rv32_nommu_virt_defconfig | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>  create mode 100644 arch/riscv/configs/rv32_nommu_virt_defconfig
> 
> diff --git a/arch/riscv/configs/rv32_nommu_virt_defconfig b/arch/riscv/configs/rv32_nommu_virt_defconfig
> new file mode 100644
> index 000000000000..460907253a80
> --- /dev/null
> +++ b/arch/riscv/configs/rv32_nommu_virt_defconfig
> @@ -0,0 +1,16 @@
> +CONFIG_BLK_DEV_INITRD=y
> +# CONFIG_MMU is not set
> +CONFIG_COMPAT_32BIT_TIME=y
> +CONFIG_SOC_VIRT=y
> +CONFIG_NONPORTABLE=y
> +CONFIG_ARCH_RV32I=y
> +CONFIG_BINFMT_FLAT=y
> +CONFIG_SLOB=y
> +CONFIG_VIRTIO_BLK=y
> +CONFIG_SERIAL_8250=y
> +CONFIG_SERIAL_8250_CONSOLE=y
> +CONFIG_SERIAL_OF_PLATFORM=y
> +CONFIG_VIRTIO_MMIO=y
> +CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
> +CONFIG_EXT2_FS=y
> +CONFIG_PRINTK_TIME=y
> -- 
> 2.39.0
> 
> 

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