x86/amd-iommu: Workaround for erratum 63

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There is an erratum for IOMMU hardware which documents
undefined behavior when forwarding SMI requests from
peripherals and the DTE of that peripheral has a sysmgt
value of 01b. This problem caused weird IO_PAGE_FAULTS in my
case.
This patch implements the suggested workaround for that
erratum into the AMD IOMMU driver.  The erratum is
documented with number 63.

Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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This commit is contained in:

Joerg Roedel 2009-10-09 18:31:20 +02:00

parent c7084b35eb

commit c5cca146aa

3 changed files with 25 additions and 0 deletions

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1

arch/x86/include/asm/amd_iommu.h

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2

arch/x86/kernel/amd_iommu.c

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22

arch/x86/kernel/amd_iommu_init.c

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