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

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Date:   Wed, 27 Apr 2022 20:04:00 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        iommu@...ts.linux-foundation.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>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        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: [PATCH 5/5] iommu/sun50i: Ensure the IOMMU can be used for DMA

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>
---

 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.
 
-- 
2.35.1