linux-kernel - Re: [PATCH 5/5] iommu/sun50i: Ensure the IOMMU can be used for DMA

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Date:   Thu, 28 Apr 2022 07:35:24 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        iommu@...ts.linux-foundation.org,
        Samuel Holland <samuel@...lland.org>
Cc:     Heiko Stuebner <heiko@...ech.de>,
        Palmer Dabbelt <palmer@...belt.com>,
        linux-riscv@...ts.infradead.org,
        Samuel Holland <samuel@...lland.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maxime Ripard <mripard@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH 5/5] iommu/sun50i: Ensure the IOMMU can be used for DMA

Dne četrtek, 28. april 2022 ob 03:04:00 CEST je Samuel Holland napisal(a):
> So far, the driver has relied on arch/arm64/Kconfig to select IOMMU_DMA.
> Unsurprisingly, this does not work on RISC-V, so the driver must select
> IOMMU_DMA itself.
> 
> Signed-off-by: Samuel Holland <samuel@...lland.org>

Reviewed-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej

> ---
> 
>  drivers/iommu/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index c79a0df090c0..70a0bfa6d907 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -223,6 +223,7 @@ config SUN50I_IOMMU
>  	depends on ARCH_SUNXI || COMPILE_TEST
>  	select ARM_DMA_USE_IOMMU
>  	select IOMMU_API
> +	select IOMMU_DMA
>  	help
>  	  Support for the IOMMU introduced in the Allwinner H6 SoCs.