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[Deepin-Kernel-SIG] [linux 6.6-y] [Deepin] deepin: arm64: deepin_desktop_defconfig: remove IOMMU_DEFAULT_PASSTHR… #1336

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[Deepin-Kernel-SIG] [linux 6.6-y] [Deepin] deepin: arm64: deepin_desktop_defconfig: remove IOMMU_DEFAULT_PASSTHR… #1336

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1 change: 0 additions & 1 deletion arch/arm64/configs/deepin_arm64_desktop_defconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -4056,7 +4056,6 @@ CONFIG_MTK_CMDQ_MBOX=m
CONFIG_SPRD_MBOX=m
CONFIG_QCOM_IPCC=m
CONFIG_IOMMU_IO_PGTABLE_ARMV7S=y
CONFIG_IOMMU_DEFAULT_PASSTHROUGH=y
CONFIG_IOMMUFD=m
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Copilot AI Dec 1, 2025

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The PR description mentions this change may affect 'cix' (referencing CIX_DSP_REMOTEPROC and related configs at lines 4074-4077) and certain hardware devices (Phytium FT2000, Kunpeng 920). Consider adding a code comment near the IOMMU configuration section documenting this deliberate removal and any known hardware compatibility considerations, especially since CONFIG_SMMU_BYPASS_DEV=y is still enabled at line 4062 which may provide an alternative bypass mechanism for affected devices.

Suggested change
CONFIG_IOMMUFD=m
CONFIG_IOMMUFD=m
# NOTE: The following IOMMU (SMMU) configuration may affect 'cix' (see CIX_DSP_REMOTEPROC and related configs previously at lines 4074-4077)
# and certain hardware devices (Phytium FT2000, Kunpeng 920). The deliberate removal of CIX_DSP_REMOTEPROC and related configs
# may impact compatibility for these devices. However, CONFIG_SMMU_BYPASS_DEV=y is still enabled below, which may provide
# an alternative bypass mechanism for affected devices. Please review hardware requirements before modifying these options.

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CONFIG_ARM_SMMU=y
CONFIG_ARM_SMMU_V3=y
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