x86/amd-iommu: Add device bind reference counting

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This patch adds a reference count to each device to count
how often the device was bound to that domain. This is
important for single devices that act as an alias for a
number of others. These devices must stay bound to their
domains until all devices that alias to it are unbound from
the same domain.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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This commit is contained in:

Joerg Roedel 2009-11-25 15:59:57 +01:00

parent 657cbb6b6c

commit 241000556f

2 changed files with 30 additions and 8 deletions

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1

arch/x86/include/asm/amd_iommu_types.h

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37

arch/x86/kernel/amd_iommu.c

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