blob: 2ba6d9c13622baf414fa698c9f4f684728b6e1af (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
#
# IOMMU devices
#
menu "IOMMU device drivers"
config IOMMU
bool "Enable Driver Model for IOMMU drivers"
depends on DM
help
Enable driver model for IOMMU devices. An IOMMU maps device
virtiual memory addresses to physical addresses. Devices
that sit behind an IOMMU can typically only access physical
memory if the IOMMU has been programmed to allow access to
that memory.
config APPLE_DART
bool "Apple DART support"
depends on IOMMU && ARCH_APPLE
default y
help
Enable support for the DART on Apple SoCs. The DART is Apple's
IOMMU implementation. The driver performs the necessary
configuration to put the DART into bypass mode such that it can
be used transparently by U-Boot.
config QCOM_HYP_SMMU
bool "Qualcomm quirky SMMU support"
depends on IOMMU && ARCH_SNAPDRAGON
help
Enable support for the Qualcomm variant of the Arm System MMU-500.
Qualcomm boards have a non-standard SMMU where some registers are
emulated by the hypervisor. It is initialised early in the boot
process and can't be turned off.
The main caveat with this hardware is that it doesn't support BYPASS
streams, attempting to configure once will instead wind up with a
FAULT stream, and the device will crash when DMA is attempted.
Say Y here to enable support for non-boot peripherals like USB by
configuring identity mapped streams for them.
endmenu
|
