iommu/arm-smmu-v3: limit use of 2-level stream tables

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In the current arm-smmu-v3 driver, all smmus that support 2-level
stream tables are being forced to use them. This is suboptimal for
smmus that support fewer stream id bits than would fill in a single
second level table. This patch limits the use of 2-level tables to
smmus that both support the feature and whose first level table can
possibly contain more than a single entry.

Signed-off-by: Nate Watterson <nwatters@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Nate Watterson 2017-01-10 14:47:13 -05:00 • committed by Will Deacon

parent 810871c570

commit 692c4e422d

1 changed files with 10 additions and 11 deletions

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drivers/iommu/arm-smmu-v3.c

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