amd-iommu: disable cmd buffer and evt logging before reprogramming iommu

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The IOMMU spec states that IOMMU behavior may be undefined when the
IOMMU registers are rewritten while command or event buffer is enabled.
Disable them in IOMMU disable path.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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Chris Wright 2009-06-15 15:53:45 +02:00 • committed by Joerg Roedel

parent 42a49f965a

commit a8c485bb68

1 changed files with 9 additions and 0 deletions

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arch/x86/kernel/amd_iommu_init.c

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