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_SVA 15 select IOMMU_IOPF 16 select IOMMUFD_DRIVER if IOMMUFD 17 select GENERIC_PT 18 select IOMMU_PT 19 select IOMMU_PT_AMDV1 20 select IOMMU_PT_X86_64 21 depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE 22 help 23 With this option you can enable support for AMD IOMMU hardware in 24 your system. An IOMMU is a hardware component which provides 25 remapping of DMA memory accesses from devices. With an AMD IOMMU you 26 can isolate the DMA memory of different devices and protect the 27 system from misbehaving device drivers or hardware. 28 29 You can find out if your system has an AMD IOMMU if you look into 30 your BIOS for an option to enable it or if you have an IVRS ACPI 31 table. 32 33config AMD_IOMMU_IOMMUFD 34 bool "Enable IOMMUFD features for AMD IOMMU (EXPERIMENTAL)" 35 depends on IOMMUFD 36 depends on AMD_IOMMU 37 help 38 Support for IOMMUFD features intended to support virtual machines 39 with accelerated virtual IOMMUs. 40 41 Say Y here if you are doing development and testing on this feature. 42 43config AMD_IOMMU_DEBUGFS 44 bool "Enable AMD IOMMU internals in DebugFS" 45 depends on AMD_IOMMU && IOMMU_DEBUGFS 46 help 47 !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! 48 49 DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!! 50 Exposes AMD IOMMU device internals in DebugFS. 51 52 This option is -NOT- intended for production environments, and should 53 not generally be enabled. 54