From: Andi Kleen Date: Fri, 29 Jul 2005 04:15:32 +0000 (-0700) Subject: [PATCH] x86_64: Improve CONFIG_GART_IOMMU description and make it default y X-Git-Tag: v2.6.13-rc5~148 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a54649b801e5fe69755dc55e6589f7a65af25d79;p=linux-2.6 [PATCH] x86_64: Improve CONFIG_GART_IOMMU description and make it default y Signed-off-by: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index 4b8326177c..660a03a89e 100644 --- a/arch/x86_64/Kconfig +++ b/arch/x86_64/Kconfig @@ -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