Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH 1/6] AMD IOMMU: more verbose Kconfig description text | Date | Thu, 3 Jul 2008 19:35:06 +0200 |
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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> --- arch/x86/Kconfig | 10 +++++++++- 1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index dc6425e..c31047a 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -568,7 +568,15 @@ 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 -- 1.5.3.7
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