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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| # 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 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| obj-$(CONFIG_IOMMU_API) += iommu.o | ||
| obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o | ||
| obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o | ||
| obj-$(CONFIG_DMAR) += dmar.o iova.o intel-iommu.o | ||
| obj-$(CONFIG_INTR_REMAP) += dmar.o intr_remapping.o |
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