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Message-ID: <ea37d824-5bfa-9e6c-a007-c5b794cd44e3@collabora.com> Date: Wed, 1 Feb 2023 14:13:06 +0100 From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com> To: Nícolas F. R. A. Prado <nfraprado@...labora.com>, Matthias Brugger <matthias.bgg@...il.com> Cc: kernel@...labora.com, Arnd Bergmann <arnd@...db.de>, Bjorn Andersson <quic_bjorande@...cinc.com>, Catalin Marinas <catalin.marinas@....com>, Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Geert Uytterhoeven <geert+renesas@...der.be>, Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, Marcel Ziswiler <marcel.ziswiler@...adex.com>, Shawn Guo <shawnguo@...nel.org>, Will Deacon <will@...nel.org>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3 2/2] arm64: defconfig: Enable DMA_RESTRICTED_POOL Il 30/01/23 21:08, Nícolas F. R. A. Prado ha scritto: > Enable support for restricted DMA pools which provide a level of DMA > memory protection on systems with limited hardware protection > capabilities, such as those lacking an IOMMU. > > For instance, mt8192-asurada-spherion makes use of this to provide a > restricted DMA region for WiFi since its MT7921E WiFi card is connected > through PCIe, and the MT8192 SoC doesn't have an IOMMU context for the > PCIe controller. > > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com> > On MT8173 Elm, MT8192 Spherion, MT8195 Tomato: Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
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