diff options
Diffstat (limited to 'arch/x86_64/Kconfig')
| -rw-r--r-- | arch/x86_64/Kconfig | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index 4b8326177c52..660a03a89e66 100644 --- a/arch/x86_64/Kconfig +++ b/arch/x86_64/Kconfig | |||
| @@ -329,12 +329,15 @@ config HPET_EMULATE_RTC | |||
| 329 | 329 | ||
| 330 | config GART_IOMMU | 330 | config GART_IOMMU |
| 331 | bool "IOMMU support" | 331 | bool "IOMMU support" |
| 332 | default y | ||
| 332 | depends on PCI | 333 | depends on PCI |
| 333 | help | 334 | help |
| 334 | Support the K8 IOMMU. Needed to run systems with more than 4GB of memory | 335 | Support the IOMMU. Needed to run systems with more than 3GB of memory |
| 335 | properly with 32-bit PCI devices that do not support DAC (Double Address | 336 | properly with 32-bit PCI devices that do not support DAC (Double Address |
| 336 | Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter. | 337 | Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter. |
| 337 | Normally the kernel will take the right choice by itself. | 338 | Normally the kernel will take the right choice by itself. |
| 339 | This option includes a driver for the AMD Opteron/Athlon64 IOMMU | ||
| 340 | and a software emulation used on some other systems. | ||
| 338 | If unsure, say Y. | 341 | If unsure, say Y. |
| 339 | 342 | ||
| 340 | # need this always enabled with GART_IOMMU for the VIA workaround | 343 | # need this always enabled with GART_IOMMU for the VIA workaround |