From a54649b801e5fe69755dc55e6589f7a65af25d79 Mon Sep 17 00:00:00 2001 From: Andi Kleen <ak@suse.de> Date: Thu, 28 Jul 2005 21:15:32 -0700 Subject: [PATCH] [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> --- arch/x86_64/Kconfig | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) 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 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