iommu/vt-d: Split up iommu->domains array

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This array is indexed by the domain-id and contains the
pointers to the domains attached to this iommu. Modern
systems support 65536 domain ids, so that this array has a
size of 512kb, per iommu.

This is a huge waste of space, as the array is usually
sparsely populated. This patch makes the array
two-dimensional and allocates the memory for the domain
pointers on-demand.

Signed-off-by: Joerg Roedel <jroedel@suse.de>

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This commit is contained in:

Joerg Roedel 2015-07-21 10:41:21 +02:00

parent 9452d5bfe5

commit 8bf478163e

2 changed files with 44 additions and 12 deletions

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54

drivers/iommu/intel-iommu.c

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2

include/linux/intel-iommu.h

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