From: Joerg Roedel <jroedel@suse.de>
Date: Tue, 21 Jul 2015 08:41:21 +0000 (+0200)
Subject: iommu/vt-d: Split up iommu->domains array
X-Git-Tag: omap-for-v4.3/fixes-rc1~57^2^6~29
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8bf478163e69e42973c7070179a11815139e5bf0;p=pandora-kernel.git

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

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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