68255b6287
For better navigation this patch moves the drivers/iommu drivers into its own submenu in Kconfig. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
111 lines
3.5 KiB
Plaintext
111 lines
3.5 KiB
Plaintext
# IOMMU_API always gets selected by whoever wants it.
|
|
config IOMMU_API
|
|
bool
|
|
|
|
menuconfig IOMMU_SUPPORT
|
|
bool "IOMMU Hardware Support"
|
|
default y
|
|
---help---
|
|
Say Y here if you want to compile device drivers for IO Memory
|
|
Management Units into the kernel. These devices usually allow to
|
|
remap DMA requests and/or remap interrupts from other devices on the
|
|
system.
|
|
|
|
if IOMMU_SUPPORT
|
|
|
|
# MSM IOMMU support
|
|
config MSM_IOMMU
|
|
bool "MSM IOMMU Support"
|
|
depends on ARCH_MSM8X60 || ARCH_MSM8960
|
|
select IOMMU_API
|
|
help
|
|
Support for the IOMMUs found on certain Qualcomm SOCs.
|
|
These IOMMUs allow virtualization of the address space used by most
|
|
cores within the multimedia subsystem.
|
|
|
|
If unsure, say N here.
|
|
|
|
config IOMMU_PGTABLES_L2
|
|
def_bool y
|
|
depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
|
|
|
|
# AMD IOMMU support
|
|
config AMD_IOMMU
|
|
bool "AMD IOMMU support"
|
|
select SWIOTLB
|
|
select PCI_MSI
|
|
select PCI_IOV
|
|
select IOMMU_API
|
|
depends on X86_64 && PCI && ACPI
|
|
---help---
|
|
With this option you can enable support for AMD IOMMU hardware in
|
|
your system. An IOMMU is a hardware component which provides
|
|
remapping of DMA memory accesses from devices. With an AMD IOMMU you
|
|
can isolate the the DMA memory of different devices and protect the
|
|
system from misbehaving device drivers or hardware.
|
|
|
|
You can find out if your system has an AMD IOMMU if you look into
|
|
your BIOS for an option to enable it or if you have an IVRS ACPI
|
|
table.
|
|
|
|
config AMD_IOMMU_STATS
|
|
bool "Export AMD IOMMU statistics to debugfs"
|
|
depends on AMD_IOMMU
|
|
select DEBUG_FS
|
|
---help---
|
|
This option enables code in the AMD IOMMU driver to collect various
|
|
statistics about whats happening in the driver and exports that
|
|
information to userspace via debugfs.
|
|
If unsure, say N.
|
|
|
|
# Intel IOMMU support
|
|
config DMAR
|
|
bool "Support for DMA Remapping Devices"
|
|
depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
|
|
select IOMMU_API
|
|
help
|
|
DMA remapping (DMAR) devices support enables independent address
|
|
translations for Direct Memory Access (DMA) from devices.
|
|
These DMA remapping devices are reported via ACPI tables
|
|
and include PCI device scope covered by these DMA
|
|
remapping devices.
|
|
|
|
config DMAR_DEFAULT_ON
|
|
def_bool y
|
|
prompt "Enable DMA Remapping Devices by default"
|
|
depends on DMAR
|
|
help
|
|
Selecting this option will enable a DMAR device at boot time if
|
|
one is found. If this option is not selected, DMAR support can
|
|
be enabled by passing intel_iommu=on to the kernel.
|
|
|
|
config DMAR_BROKEN_GFX_WA
|
|
bool "Workaround broken graphics drivers (going away soon)"
|
|
depends on DMAR && BROKEN && X86
|
|
---help---
|
|
Current Graphics drivers tend to use physical address
|
|
for DMA and avoid using DMA APIs. Setting this config
|
|
option permits the IOMMU driver to set a unity map for
|
|
all the OS-visible memory. Hence the driver can continue
|
|
to use physical addresses for DMA, at least until this
|
|
option is removed in the 2.6.32 kernel.
|
|
|
|
config DMAR_FLOPPY_WA
|
|
def_bool y
|
|
depends on DMAR && X86
|
|
---help---
|
|
Floppy disk drivers are known to bypass DMA API calls
|
|
thereby failing to work when IOMMU is enabled. This
|
|
workaround will setup a 1:1 mapping for the first
|
|
16MiB to make floppy (an ISA device) work.
|
|
|
|
config INTR_REMAP
|
|
bool "Support for Interrupt Remapping (EXPERIMENTAL)"
|
|
depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
|
|
---help---
|
|
Supports Interrupt remapping for IO-APIC and MSI devices.
|
|
To use x2apic mode in the CPU's which support x2APIC enhancements or
|
|
to support platforms with CPU's having > 8 bit APIC ID, say Y.
|
|
|
|
endif # IOMMU_SUPPORT
|