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authorAndi Kleen <ak@suse.de>2005-07-28 21:15:32 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-28 21:45:59 -0700
commita54649b801e5fe69755dc55e6589f7a65af25d79 (patch)
tree77245e9b10077b63325972761a711adaa6fa9588 /arch/x86_64/Kconfig
parentc853cc7e7940a2d6ad66cfe666192516fc06b0e3 (diff)
downloadblackbird-op-linux-a54649b801e5fe69755dc55e6589f7a65af25d79.tar.gz
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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>
Diffstat (limited to 'arch/x86_64/Kconfig')
-rw-r--r--arch/x86_64/Kconfig5
1 files changed, 4 insertions, 1 deletions
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
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