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[PATCH] x86_64: Improve CONFIG_GART_IOMMU description and make it default y 

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2005-07-28 21:15:32 -07:00 committed by Linus Torvalds
parent c853cc7e79
commit a54649b801
1 changed files with 4 additions and 1 deletions
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arch/x86_64/Kconfig
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@ -329,12 +329,15 @@ config HPET_EMULATE_RTC
config GART_IOMMU
bool "IOMMU support"
default y
depends on PCI
help
Support the K8 IOMMU. Needed to run systems with more than 4GB of memory
Support the IOMMU. Needed to run systems with more than 3GB of memory
properly with 32-bit PCI devices that do not support DAC (Double Address
Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter.
Normally the kernel will take the right choice by itself.
This option includes a driver for the AMD Opteron/Athlon64 IOMMU
and a software emulation used on some other systems.
If unsure, say Y.
# need this always enabled with GART_IOMMU for the VIA workaround