1cbe94c6eSJerry Snitselaar# SPDX-License-Identifier: GPL-2.0-only 2cbe94c6eSJerry Snitselaar# AMD IOMMU support 3cbe94c6eSJerry Snitselaarconfig AMD_IOMMU 4cbe94c6eSJerry Snitselaar bool "AMD IOMMU support" 5cbe94c6eSJerry Snitselaar select SWIOTLB 6cbe94c6eSJerry Snitselaar select PCI_MSI 7cbe94c6eSJerry Snitselaar select PCI_ATS 8cbe94c6eSJerry Snitselaar select PCI_PRI 9cbe94c6eSJerry Snitselaar select PCI_PASID 100eaa67adSMarc Zyngier select IRQ_MSI_LIB 11bbe1e78aSAndy Shevchenko select MMU_NOTIFIER 12cbe94c6eSJerry Snitselaar select IOMMU_API 13cbe94c6eSJerry Snitselaar select IOMMU_IOVA 141af95763SVasant Hegde select IOMMU_SVA 15c4cb2311SVasant Hegde select IOMMU_IOPF 16421a511aSJoao Martins select IOMMUFD_DRIVER if IOMMUFD 17*789a5913SAlejandro Jimenez select GENERIC_PT 18*789a5913SAlejandro Jimenez select IOMMU_PT 19*789a5913SAlejandro Jimenez select IOMMU_PT_AMDV1 20*789a5913SAlejandro Jimenez select IOMMU_PT_X86_64 21e52d58d5SSuravee Suthikulpanit depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE 22cbe94c6eSJerry Snitselaar help 23cbe94c6eSJerry Snitselaar With this option you can enable support for AMD IOMMU hardware in 24cbe94c6eSJerry Snitselaar your system. An IOMMU is a hardware component which provides 25cbe94c6eSJerry Snitselaar remapping of DMA memory accesses from devices. With an AMD IOMMU you 26cbe94c6eSJerry Snitselaar can isolate the DMA memory of different devices and protect the 27cbe94c6eSJerry Snitselaar system from misbehaving device drivers or hardware. 28cbe94c6eSJerry Snitselaar 29cbe94c6eSJerry Snitselaar You can find out if your system has an AMD IOMMU if you look into 30cbe94c6eSJerry Snitselaar your BIOS for an option to enable it or if you have an IVRS ACPI 31cbe94c6eSJerry Snitselaar table. 32cbe94c6eSJerry Snitselaar 33cbe94c6eSJerry Snitselaarconfig AMD_IOMMU_DEBUGFS 34cbe94c6eSJerry Snitselaar bool "Enable AMD IOMMU internals in DebugFS" 35cbe94c6eSJerry Snitselaar depends on AMD_IOMMU && IOMMU_DEBUGFS 36cbe94c6eSJerry Snitselaar help 37cbe94c6eSJerry Snitselaar !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! 38cbe94c6eSJerry Snitselaar 39cbe94c6eSJerry Snitselaar DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!! 40cbe94c6eSJerry Snitselaar Exposes AMD IOMMU device internals in DebugFS. 41cbe94c6eSJerry Snitselaar 42cbe94c6eSJerry Snitselaar This option is -NOT- intended for production environments, and should 43cbe94c6eSJerry Snitselaar not generally be enabled. 44