netdev - Re: [PATCH 02/12] riscv: only select DMA_DIRECT_REMAP from RISCV_ISA

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Date: Mon, 16 Oct 2023 16:39:40 +0100
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Christoph Hellwig <hch@....de>
Cc: Greg Ungerer <gerg@...ux-m68k.org>, iommu@...ts.linux.dev, 
	Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, 
	Conor Dooley <conor@...nel.org>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Magnus Damm <magnus.damm@...il.com>, Robin Murphy <robin.murphy@....com>, 
	Marek Szyprowski <m.szyprowski@...sung.com>, Geert Uytterhoeven <geert@...ux-m68k.org>, 
	Wei Fang <wei.fang@....com>, Shenwei Wang <shenwei.wang@....com>, 
	Clark Wang <xiaoning.wang@....com>, NXP Linux Team <linux-imx@....com>, 
	linux-m68k@...ts.linux-m68k.org, netdev@...r.kernel.org, 
	linux-riscv@...ts.infradead.org, linux-renesas-soc@...r.kernel.org, 
	Jim Quinlan <james.quinlan@...adcom.com>
Subject: Re: [PATCH 02/12] riscv: only select DMA_DIRECT_REMAP from RISCV_ISA_ZICBOM

On Mon, Oct 16, 2023 at 6:48 AM Christoph Hellwig <hch@....de> wrote:
>
> RISCV_DMA_NONCOHERENT is also used for whacky non-standard
> non-coherent ops that use different hooks in dma-direct.
>
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  arch/riscv/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Cheers,
Prabhakar

> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index 0ac0b538379718..9c48fecc671918 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -273,7 +273,6 @@ config RISCV_DMA_NONCOHERENT
>         select ARCH_HAS_SYNC_DMA_FOR_CPU
>         select ARCH_HAS_SYNC_DMA_FOR_DEVICE
>         select DMA_BOUNCE_UNALIGNED_KMALLOC if SWIOTLB
> -       select DMA_DIRECT_REMAP if MMU
>
>  config RISCV_NONSTANDARD_CACHE_OPS
>         bool
> @@ -549,6 +548,7 @@ config RISCV_ISA_ZICBOM
>         depends on RISCV_ALTERNATIVE
>         default y
>         select RISCV_DMA_NONCOHERENT
> +       select DMA_DIRECT_REMAP
>         help
>            Adds support to dynamically detect the presence of the ZICBOM
>            extension (Cache Block Management Operations) and enable its
> --
> 2.39.2
>