iommu/arm-smmu: Support non-strict mode
commit 44f6876a00e83df5fd28681502b19b0f51e4a3c6 upstream All we need is to wire up .flush_iotlb_all properly and implement the domain attribute, and iommu-dma and io-pgtable will do the rest for us. The only real subtlety is documenting the barrier semantics we're introducing between io-pgtable and the drivers for non-strict flushes. Signed-off-by: NRobin Murphy <robin.murphy@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NZou Cao <zoucao@linux.alibaba.com> Reviewed-by: NBaoyou Xie <xie.baoyou@linux.alibaba.com>
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