Re: [PATCH 2/3] riscv: Implement Zicbom-based cache management operations

[Randy Dunlap]

On 6/9/22 17:43, Heiko Stuebner wrote:
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index 32ffef9f6e5b..384d0c15f2b6 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -376,6 +376,21 @@ config RISCV_ISA_SVPBMT
>  
>  	   If you don't know what to do here, say Y.
>  
> +config RISCV_ISA_ZICBOM
> +	bool "Zicbom extension support for non-coherent dma operation"
> +	select ARCH_HAS_DMA_PREP_COHERENT
> +	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
> +	select ARCH_HAS_SYNC_DMA_FOR_CPU
> +	select ARCH_HAS_SETUP_DMA_OPS
> +	select DMA_DIRECT_REMAP
> +	select RISCV_ALTERNATIVE

Since RISCV_ALTERNATIVE depends on !XIP_KERNEL and since 'select' does not
follow any dependency chains, this config also needs to depend on
!XIP_KERNEL.

> +	default y
> +	help
> +	   Adds support to dynamically detect the presence of the ZICBOM extension
> +	   (Cache Block Management Operations) and enable its usage.
> +
> +	   If you don't know what to do here, say Y.

-- 
~Randy