Re: [PATCH 2/2] iommu/arm-smmu: Add support for non-coherent page table mappings

[Will Deacon]

On Thu, Jan 17, 2019 at 02:57:18PM +0530, Vivek Gautam wrote:
> Adding a device tree option for arm smmu to enable non-cacheable
> memory for page tables.
> We already enable a smmu feature for coherent walk based on
> whether the smmu device is dma-coherent or not. Have an option
> to enable non-cacheable page table memory to force set it for
> particular smmu devices.

Hmm, I must be missing something here. What is the difference between this
new property, and simply omitting dma-coherent on the SMMU?

Will