| 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. |