1# SPDX-License-Identifier: GPL-2.0-only 2# AMD IOMMU support 3config AMD_IOMMU 4 bool "AMD IOMMU support" 5 select SWIOTLB 6 select PCI_MSI 7 select PCI_ATS 8 select PCI_PRI 9 select PCI_PASID 10 select IRQ_MSI_LIB 11 select MMU_NOTIFIER 12 select IOMMU_API 13 select IOMMU_IOVA 14 select IOMMU_IO_PGTABLE 15 select IOMMU_SVA 16 select IOMMU_IOPF 17 select IOMMUFD_DRIVER if IOMMUFD 18 depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE 19 help 20 With this option you can enable support for AMD IOMMU hardware in 21 your system. An IOMMU is a hardware component which provides 22 remapping of DMA memory accesses from devices. With an AMD IOMMU you 23 can isolate the DMA memory of different devices and protect the 24 system from misbehaving device drivers or hardware. 25 26 You can find out if your system has an AMD IOMMU if you look into 27 your BIOS for an option to enable it or if you have an IVRS ACPI 28 table. 29 30config AMD_IOMMU_DEBUGFS 31 bool "Enable AMD IOMMU internals in DebugFS" 32 depends on AMD_IOMMU && IOMMU_DEBUGFS 33 help 34 !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! 35 36 DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!! 37 Exposes AMD IOMMU device internals in DebugFS. 38 39 This option is -NOT- intended for production environments, and should 40 not generally be enabled. 41