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authorJoerg Roedel <joerg.roedel@amd.com>2008-07-03 19:35:06 +0200
committerIngo Molnar <mingo@elte.hu>2008-07-04 11:44:37 +0200
commit18d22200740b83a5d968d3236c27c310b3e8fda6 (patch)
tree989fea5de12ee9c41fdcfdda098621f65a6c07db /arch/x86/Kconfig
parent7441e9cb18a1a1e5b87f516fa97b6d4abb0838e3 (diff)
x86, AMD IOMMU: more verbose Kconfig description text
This patch replaces the short description text for AMD IOMMU in Kconfig with a more verbose one. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Cc: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/Kconfig')
-rw-r--r--arch/x86/Kconfig10
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8aae462f4e0..b120cffae1e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -554,7 +554,15 @@ config AMD_IOMMU
select SWIOTLB
depends on X86_64 && PCI && ACPI
help
- Select this to get support for AMD IOMMU hardware in your system.
+ With this option you can enable support for AMD IOMMU hardware in
+ your system. An IOMMU is a hardware component which provides
+ remapping of DMA memory accesses from devices. With an AMD IOMMU you
+ can isolate the the DMA memory of different devices and protect the
+ system from misbehaving device drivers or hardware.
+
+ You can find out if your system has an AMD IOMMU if you look into
+ your BIOS for an option to enable it or if you have an IVRS ACPI
+ table.
# need this always selected by IOMMU for the VIA workaround
config SWIOTLB