quoted

The Tegra Next Generation SOC uses arm-smmu-v3, but it doesn't have support for BTM.
Do you have plan to get your earlier patch to handle invalidate 
notifications into upstream sometime soon?

Is that a limitation of the SMMU implementation, the interconnect or the integration?

It is the limitation of interconnect. The DVM messages don't reach SMMU. 
The BTM bit in SMMU IDR does indicate that it doesn't support BTM. 

-KR

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