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| author | Jon Mason <jdmason@us.ibm.com> | 2006-03-25 16:31:34 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 09:14:38 -0800 |
| commit | 5d05f4de414c98348219b633401ad9c9a5348a8b (patch) | |
| tree | 23c0ec4184594b3b59562e9a505bab99332ba487 /arch/x86_64/Kconfig | |
| parent | ba22f13563de5773701fc318ccaaa37b1fb6d294 (diff) | |
| download | op-kernel-dev-5d05f4de414c98348219b633401ad9c9a5348a8b.zip op-kernel-dev-5d05f4de414c98348219b633401ad9c9a5348a8b.tar.gz | |
[PATCH] x86_64: Make GART_IOMMU kconfig help text more specific (trivial)
Have the GART_IOMMU help text specify that this is the hardware IOMMU in
amd64 processors. This will be significant if/when other IOMMUs are
added to the x86-64 architecture. :-)
Also, note that the previous help text stated that IOMMU was needed for
>3GB memory instead of >4GB. This is fixed in the newer version.
Signed-off-by: Jon Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/Kconfig')
| -rw-r--r-- | arch/x86_64/Kconfig | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index 31bab72..6420bae 100644 --- a/arch/x86_64/Kconfig +++ b/arch/x86_64/Kconfig @@ -364,13 +364,15 @@ config GART_IOMMU select SWIOTLB depends on PCI help - 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 northbridge IOMMU - and a software emulation used on other systems. - If unsure, say Y. + Support for hardware IOMMU in AMD's Opteron/Athlon64 Processors + and for the bounce buffering software 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 + northbridge and a software emulation used on other systems without + hardware IOMMU. If unsure, say Y. # need this always enabled with GART_IOMMU for the VIA workaround config SWIOTLB |
