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H A Dmtk_iommu.cdiff ab1d5281a62bafbd611fffdce7eab6eb9577aa0d Mon Jan 11 12:19:10 CET 2021 Yong Wu <yong.wu@mediatek.com> iommu/mediatek: Add iova reserved function

For multiple iommu_domains, we need to reserve some iova regions. Take a
example, If the default iova region is 0 ~ 4G, but the 0x4000_0000 ~
0x43ff_ffff is only for the special CCU0 domain. Thus we should exclude
this region for the default iova region.

Signed-off-by: Anan sun <anan.sun@mediatek.com>
Signed-off-by: Chao Hao <chao.hao@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Link: https://lore.kernel.org/r/20210111111914.22211-30-yong.wu@mediatek.com
Signed-off-by: Will Deacon <will@kernel.org>