| Ohad Ben-Cohen | ab493a0 | 2011-06-02 02:48:05 +0300 | [diff] [blame] | 1 | # IOMMU_API always gets selected by whoever wants it. |
| 2 | config IOMMU_API |
| 3 | bool |
| Ohad Ben-Cohen | b10f127 | 2011-06-02 03:20:08 +0300 | [diff] [blame] | 4 | |
| 5 | # MSM IOMMU support |
| 6 | config MSM_IOMMU |
| 7 | bool "MSM IOMMU Support" |
| 8 | depends on ARCH_MSM8X60 || ARCH_MSM8960 |
| 9 | select IOMMU_API |
| 10 | help |
| 11 | Support for the IOMMUs found on certain Qualcomm SOCs. |
| 12 | These IOMMUs allow virtualization of the address space used by most |
| 13 | cores within the multimedia subsystem. |
| 14 | |
| 15 | If unsure, say N here. |
| 16 | |
| 17 | config IOMMU_PGTABLES_L2 |
| 18 | def_bool y |
| 19 | depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n |
| Ohad Ben-Cohen | 29b6841 | 2011-06-05 18:22:18 +0300 | [diff] [blame] | 20 | |
| 21 | # AMD IOMMU support |
| 22 | config AMD_IOMMU |
| 23 | bool "AMD IOMMU support" |
| 24 | select SWIOTLB |
| 25 | select PCI_MSI |
| 26 | select PCI_IOV |
| 27 | select IOMMU_API |
| 28 | depends on X86_64 && PCI && ACPI |
| 29 | ---help--- |
| 30 | With this option you can enable support for AMD IOMMU hardware in |
| 31 | your system. An IOMMU is a hardware component which provides |
| 32 | remapping of DMA memory accesses from devices. With an AMD IOMMU you |
| 33 | can isolate the the DMA memory of different devices and protect the |
| 34 | system from misbehaving device drivers or hardware. |
| 35 | |
| 36 | You can find out if your system has an AMD IOMMU if you look into |
| 37 | your BIOS for an option to enable it or if you have an IVRS ACPI |
| 38 | table. |
| 39 | |
| 40 | config AMD_IOMMU_STATS |
| 41 | bool "Export AMD IOMMU statistics to debugfs" |
| 42 | depends on AMD_IOMMU |
| 43 | select DEBUG_FS |
| 44 | ---help--- |
| 45 | This option enables code in the AMD IOMMU driver to collect various |
| 46 | statistics about whats happening in the driver and exports that |
| 47 | information to userspace via debugfs. |
| 48 | If unsure, say N. |
| Ohad Ben-Cohen | 166e927 | 2011-06-10 21:42:27 +0300 | [diff] [blame^] | 49 | |
| 50 | # Intel IOMMU support |
| 51 | config DMAR |
| 52 | bool "Support for DMA Remapping Devices" |
| 53 | depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) |
| 54 | select IOMMU_API |
| 55 | help |
| 56 | DMA remapping (DMAR) devices support enables independent address |
| 57 | translations for Direct Memory Access (DMA) from devices. |
| 58 | These DMA remapping devices are reported via ACPI tables |
| 59 | and include PCI device scope covered by these DMA |
| 60 | remapping devices. |
| 61 | |
| 62 | config DMAR_DEFAULT_ON |
| 63 | def_bool y |
| 64 | prompt "Enable DMA Remapping Devices by default" |
| 65 | depends on DMAR |
| 66 | help |
| 67 | Selecting this option will enable a DMAR device at boot time if |
| 68 | one is found. If this option is not selected, DMAR support can |
| 69 | be enabled by passing intel_iommu=on to the kernel. |
| 70 | |
| 71 | config DMAR_BROKEN_GFX_WA |
| 72 | bool "Workaround broken graphics drivers (going away soon)" |
| 73 | depends on DMAR && BROKEN && X86 |
| 74 | ---help--- |
| 75 | Current Graphics drivers tend to use physical address |
| 76 | for DMA and avoid using DMA APIs. Setting this config |
| 77 | option permits the IOMMU driver to set a unity map for |
| 78 | all the OS-visible memory. Hence the driver can continue |
| 79 | to use physical addresses for DMA, at least until this |
| 80 | option is removed in the 2.6.32 kernel. |
| 81 | |
| 82 | config DMAR_FLOPPY_WA |
| 83 | def_bool y |
| 84 | depends on DMAR && X86 |
| 85 | ---help--- |
| 86 | Floppy disk drivers are known to bypass DMA API calls |
| 87 | thereby failing to work when IOMMU is enabled. This |
| 88 | workaround will setup a 1:1 mapping for the first |
| 89 | 16MiB to make floppy (an ISA device) work. |
| 90 | |
| 91 | config INTR_REMAP |
| 92 | bool "Support for Interrupt Remapping (EXPERIMENTAL)" |
| 93 | depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL |
| 94 | ---help--- |
| 95 | Supports Interrupt remapping for IO-APIC and MSI devices. |
| 96 | To use x2apic mode in the CPU's which support x2APIC enhancements or |
| 97 | to support platforms with CPU's having > 8 bit APIC ID, say Y. |