Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) # SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) # AMD IOMMU support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) config AMD_IOMMU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 	bool "AMD IOMMU support"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 	select SWIOTLB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 	select PCI_MSI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 	select PCI_ATS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	select PCI_PRI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	select PCI_PASID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	select IOMMU_API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	select IOMMU_IOVA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	select IOMMU_DMA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	  With this option you can enable support for AMD IOMMU hardware in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	  your system. An IOMMU is a hardware component which provides
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	  remapping of DMA memory accesses from devices. With an AMD IOMMU you
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	  can isolate the DMA memory of different devices and protect the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	  system from misbehaving device drivers or hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	  You can find out if your system has an AMD IOMMU if you look into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	  your BIOS for an option to enable it or if you have an IVRS ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	  table.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) config AMD_IOMMU_V2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	tristate "AMD IOMMU Version 2 driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	depends on AMD_IOMMU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	select MMU_NOTIFIER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	  This option enables support for the AMD IOMMUv2 features of the IOMMU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	  hardware. Select this option if you want to use devices that support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	  the PCI PRI and PASID interface.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) config AMD_IOMMU_DEBUGFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	bool "Enable AMD IOMMU internals in DebugFS"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	depends on AMD_IOMMU && IOMMU_DEBUGFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	  !!!WARNING!!!  !!!WARNING!!!  !!!WARNING!!!  !!!WARNING!!!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	  DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	  Exposes AMD IOMMU device internals in DebugFS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	  This option is -NOT- intended for production environments, and should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	  not generally be enabled.