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| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-07-03 19:35:06 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-04 11:44:37 +0200 |
| commit | 18d22200740b83a5d968d3236c27c310b3e8fda6 (patch) | |
| tree | 989fea5de12ee9c41fdcfdda098621f65a6c07db /arch/x86/Kconfig | |
| parent | 7441e9cb18a1a1e5b87f516fa97b6d4abb0838e3 (diff) | |
| download | op-kernel-dev-18d22200740b83a5d968d3236c27c310b3e8fda6.zip op-kernel-dev-18d22200740b83a5d968d3236c27c310b3e8fda6.tar.gz | |
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/Kconfig | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 8aae462..b120cff 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 |
