CONFIG_DMAR_FLOPPY_WA:

General informations

The Linux kernel configuration item CONFIG_DMAR_FLOPPY_WA has multiple definitions:

found in drivers/iommu/Kconfig

The configuration item CONFIG_DMAR_FLOPPY_WA:

• prompt:
• type: bool
• depends on: CONFIG_DMAR && CONFIG_X86
• defined in drivers/iommu/Kconfig
• found in Linux kernels: 3.1

Help text

Floppy disk drivers are known to bypass DMA API calls thereby failing to work when IOMMU is enabled. This workaround will setup a 1:1 mapping for the first 16MiB to make floppy (an ISA device) work.

found in arch/x86/Kconfig

The configuration item CONFIG_DMAR_FLOPPY_WA:

• prompt:
• type: bool
• depends on: CONFIG_DMAR
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.24–2.6.39, 3.0

Help text

Floppy disk drivers are known to bypass DMA API calls thereby failing to work when IOMMU is enabled. This workaround will setup a 1:1 mapping for the first 16MiB to make floppy (an ISA device) work.

Hardware

LKDDb

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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