From: Will Deacon <will.deacon@arm.com>
Date: Wed, 31 Jul 2013 18:21:28 +0000 (+0100)
Subject: iommu/arm-smmu: Simplify VMID and ASID allocation
X-Git-Tag: v3.12-rc1~33^2^4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ecfadb6e5b49a0a56df2038bf39f1fcd652788b9;p=pandora-kernel.git

iommu/arm-smmu: Simplify VMID and ASID allocation

We only use ASIDs and VMIDs to identify individual stage-1 and stage-2
context-banks respectively, so rather than allocate these separately
from the context-banks, just calculate them based on the context bank
index.

Note that VMIDs are offset by 1, since VMID 0 is reserved for stage-1.
This doesn't cause us any issues with the numberspaces, since the
maximum number of context banks is half the minimum number of VMIDs.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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