X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86_64%2FKconfig;h=660a03a89e6663bf7f04bd83c163c441210e8dc1;hb=7dfad4183bf9cd92f977caa3c12cc74f0eefc0e6;hp=4b8326177c52fba07bc4d9399d186da6609b946a;hpb=6cd59f7a4119fef124677827a9b30684c2c8e674;p=linux-2.6

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