tree 2b999c010be5d5e05aa805f9d1a79f37e1cc89a3
parent 56fbf600dd8e2f32a5317437fe310b56719f7d2b
author Will Deacon <will.deacon@arm.com> 1483720097 +0000
committer Will Deacon <will.deacon@arm.com> 1491491203 +0100

iommu/arm-smmu: Restrict domain attributes to UNMANAGED domains

The ARM SMMU drivers provide a DOMAIN_ATTR_NESTING domain attribute,
which allows callers of the IOMMU API to request that the page table
for a domain is installed at stage-2, if supported by the hardware.

Since setting this attribute only makes sense for UNMANAGED domains,
this patch returns -ENODEV if the domain_{get,set}_attr operations are
called on other domain types.

Signed-off-by: Will Deacon <will.deacon@arm.com>