Commit a54649b8 authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
Browse files

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



Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent c853cc7e

arch/x86_64/Kconfig

+4 −1
Original line number Diff line number Diff line
@@ -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