diff options
Diffstat (limited to 'arch/x86_64/Kconfig')
| -rw-r--r-- | arch/x86_64/Kconfig | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index aab25f3..c2d2499 100644 --- a/arch/x86_64/Kconfig +++ b/arch/x86_64/Kconfig @@ -750,6 +750,38 @@ config PCI_DOMAINS depends on PCI default y +config DMAR + bool "Support for DMA Remapping Devices (EXPERIMENTAL)" + depends on PCI_MSI && ACPI && EXPERIMENTAL + default y + 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_GFX_WA + bool "Support for Graphics workaround" + depends on DMAR + default y + 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. + +config DMAR_FLOPPY_WA + bool + depends on DMAR + default y + help + Floppy disk drivers are know to bypass DMA API calls + thereby failing to work when IOMMU is enabled. This + workaround will setup a 1:1 mapping for the first + 16M to make floppy (an ISA device) work. + source "drivers/pci/pcie/Kconfig" source "drivers/pci/Kconfig" |