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arm64: defconfig: Enable DMA_RESTRICTED_POOL

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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>
Link: https://lore.kernel.org/r/20230130200820.82084-2-nfraprado@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Nícolas F. R. A. Prado
2023-01-30 15:08:20 -05:00
committed by Matthias Brugger
parent 9007857412
commit 09ea26f1bf
1 changed files with 1 additions and 0 deletions
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arch/arm64/configs/defconfig
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@@ -1408,6 +1408,7 @@ 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