From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
To: Matthias Brugger <matthias.bgg@gmail.com>
Cc: kernel@collabora.com,
"AngeloGioacchino Del Regno"
<angelogioacchino.delregno@collabora.com>,
"Nícolas F. R. A. Prado" <nfraprado@collabora.com>,
"Arnd Bergmann" <arnd@arndb.de>,
"Bjorn Andersson" <quic_bjorande@quicinc.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Dmitry Baryshkov" <dmitry.baryshkov@linaro.org>,
"Geert Uytterhoeven" <geert+renesas@glider.be>,
"Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>,
"Marcel Ziswiler" <marcel.ziswiler@toradex.com>,
"Shawn Guo" <shawnguo@kernel.org>,
"Will Deacon" <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 2/2] arm64: defconfig: Enable DMA_RESTRICTED_POOL
Date: Mon, 30 Jan 2023 15:08:20 -0500 [thread overview]
Message-ID: <20230130200820.82084-2-nfraprado@collabora.com> (raw)
In-Reply-To: <20230130200820.82084-1-nfraprado@collabora.com>
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@collabora.com>
---
Changes in v3:
- Added this patch
arch/arm64/configs/defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index be40004a0259..4e806d8068f6 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -1422,6 +1422,7 @@ CONFIG_CRYPTO_DEV_HISI_SEC2=m
CONFIG_CRYPTO_DEV_HISI_ZIP=m
CONFIG_CRYPTO_DEV_HISI_HPRE=m
CONFIG_CRYPTO_DEV_HISI_TRNG=m
+CONFIG_DMA_RESTRICTED_POOL=y
CONFIG_CMA_SIZE_MBYTES=32
CONFIG_PRINTK_TIME=y
CONFIG_DEBUG_KERNEL=y
--
2.39.1
next prev parent reply other threads:[~2023-01-30 20:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-30 20:08 [PATCH v3 1/2] arm64: defconfig: Enable missing configs for mt8192-asurada Nícolas F. R. A. Prado
2023-01-30 20:08 ` Nícolas F. R. A. Prado [this message]
2023-02-01 13:13 ` [PATCH v3 2/2] arm64: defconfig: Enable DMA_RESTRICTED_POOL AngeloGioacchino Del Regno
2023-01-31 11:29 ` [PATCH v3 1/2] arm64: defconfig: Enable missing configs for mt8192-asurada Matthias Brugger
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