linux-kernel - Re: [PATCH 3/4] riscv: Remove MMU dependency from Zbb and Zicboz

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Message-ID: <20240227-bonehead-stonework-d56052265b35@wendy>
Date: Tue, 27 Feb 2024 11:51:58 +0000
From: Conor Dooley <conor.dooley@...rochip.com>
To: Samuel Holland <samuel.holland@...ive.com>
CC: Palmer Dabbelt <palmer@...belt.com>, <linux-riscv@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/4] riscv: Remove MMU dependency from Zbb and Zicboz

On Mon, Feb 26, 2024 at 04:34:48PM -0800, Samuel Holland wrote:
> The Zbb and Zicboz ISA extensions have no dependency on an MMU and are
> equally useful on NOMMU kernels.
> 
> Signed-off-by: Samuel Holland <samuel.holland@...ive.com>

Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>

Cheers,
Conor.

> ---
> 
>  arch/riscv/Kconfig | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index bffbd869a068..ef53c00470d6 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -581,7 +581,6 @@ config TOOLCHAIN_HAS_ZBB
>  config RISCV_ISA_ZBB
>  	bool "Zbb extension support for bit manipulation instructions"
>  	depends on TOOLCHAIN_HAS_ZBB
> -	depends on MMU
>  	depends on RISCV_ALTERNATIVE
>  	default y
>  	help
> @@ -613,7 +612,6 @@ config RISCV_ISA_ZICBOM
>  
>  config RISCV_ISA_ZICBOZ
>  	bool "Zicboz extension support for faster zeroing of memory"
> -	depends on MMU
>  	depends on RISCV_ALTERNATIVE
>  	default y
>  	help
> -- 
> 2.43.0
> 

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