Lines Matching +full:dma +full:- +full:default

1 # SPDX-License-Identifier: GPL-2.0-only
13 	bool "Support for Intel IOMMU using DMA Remapping Devices"
25 	  DMA remapping (DMAR) devices support enables independent address
26 	  translations for Direct Memory Access (DMA) from devices.
27 	  These DMA remapping devices are reported via ACPI tables
28 	  and include PCI device scope covered by these DMA
45 	  This option is -NOT- intended for production environments, and should
55 	  to access DMA resources through process address space by
59 	bool "Enable Intel DMA Remapping Devices by default"
60 	default y
71 	  for DMA and avoid using DMA APIs. Setting this config
73 	  all the OS-visible memory. Hence the driver can continue
74 	  to use physical addresses for DMA, at least until this
81 	  Floppy disk drivers are known to bypass DMA API calls
87 	bool "Enable Intel IOMMU scalable mode by default"
88 	default y
90 	  Selecting this option will enable by default the scalable mode if
92 	  VT-d 3.0. The scalable mode capability could be checked by reading
93 	  /sys/devices/virtual/iommu/dmar*/intel-iommu/ecap. If this option
96 	  the default value.
107 	  processors which support Intel VT-d 4.0 and later.