diff options
| author | Ohad Ben-Cohen <ohad@wizery.com> | 2011-06-10 21:42:27 +0300 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-06-21 10:49:30 +0200 |
| commit | 166e9278a3f98bab29ebb3d685a81cfb11b98be0 (patch) | |
| tree | f8f3e8a28c5d96d9053567d6a9ef8e04e7b298dd /drivers/iommu/Kconfig | |
| parent | 29b68415e335ba9e0eb6057f9405aa4d9c23efe4 (diff) | |
x86/ia64: intel-iommu: move to drivers/iommu/
This should ease finding similarities with different platforms,
with the intention of solving problems once in a generic framework
which everyone can use.
Note: to move intel-iommu.c, the declaration of pci_find_upstream_pcie_bridge()
has to move from drivers/pci/pci.h to include/linux/pci.h. This is handled
in this patch, too.
As suggested, also drop DMAR's EXPERIMENTAL tag while we're at it.
Compile-tested on x86_64.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu/Kconfig')
| -rw-r--r-- | drivers/iommu/Kconfig | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 9246c5bf25a..e2a5f141ae2 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -46,3 +46,52 @@ config AMD_IOMMU_STATS 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. |