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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 IRQ_MSI_LIB
- select MMU_NOTIFIER
- select IOMMU_API
- select IOMMU_IOVA
- select IOMMU_SVA
- select IOMMU_IOPF
- select IOMMUFD_DRIVER if IOMMUFD
- select GENERIC_PT
- select IOMMU_PT
- select IOMMU_PT_AMDV1
- select IOMMU_PT_X86_64
- 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_IOMMUFD
- bool "Enable IOMMUFD features for AMD IOMMU (EXPERIMENTAL)"
- depends on IOMMUFD
- depends on AMD_IOMMU
- help
- Support for IOMMUFD features intended to support virtual machines
- with accelerated virtual IOMMUs.
- Say Y here if you are doing development and testing on this feature.
- 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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