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- # SPDX-License-Identifier: GPL-2.0-only
- # AMD IOMMU support
- config AMD_IOMMU
- bool "AMD IOMMU support"
- select SWIOTLB
- select PCI_MSI
- select PCI_ATS
- select PCI_PRI
- select PCI_PASID
- select IOMMU_API
- select IOMMU_IOVA
- select IOMMU_IO_PGTABLE
- depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE
- help
- With this option you can enable support for AMD IOMMU hardware in
- your system. An IOMMU is a hardware component which provides
- remapping of DMA memory accesses from devices. With an AMD IOMMU you
- can isolate the DMA memory of different devices and protect the
- system from misbehaving device drivers or hardware.
- You can find out if your system has an AMD IOMMU if you look into
- your BIOS for an option to enable it or if you have an IVRS ACPI
- table.
- config AMD_IOMMU_V2
- tristate "AMD IOMMU Version 2 driver"
- depends on AMD_IOMMU
- select MMU_NOTIFIER
- help
- This option enables support for the AMD IOMMUv2 features of the IOMMU
- hardware. Select this option if you want to use devices that support
- the PCI PRI and PASID interface.
- config AMD_IOMMU_DEBUGFS
- bool "Enable AMD IOMMU internals in DebugFS"
- depends on AMD_IOMMU && IOMMU_DEBUGFS
- help
- !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! !!!WARNING!!!
- DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!!
- Exposes AMD IOMMU device internals in DebugFS.
- This option is -NOT- intended for production environments, and should
- not generally be enabled.
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