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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>
hifive-unleashed-5.1
Joerg Roedel 2008-07-03 19:35:06 +02:00 committed by Ingo Molnar
parent 7441e9cb18
commit 18d2220074
1 changed files with 9 additions and 1 deletions
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10
arch/x86/Kconfig
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@ -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