Hi all,
I'm using i.MX8QM-MEK platform.
On the platform, Yocto Linux with SMMU off is working as expected.
When I turn on SMMU at EL2 level of privilege for supporting only Stage 2 translation, either the cores or the devices that do memory accesses (R/W) are experiencing lack of performance, resulting in a quite slow boot phase (2x slower). Turning it off at runtime results in better performance.
What can be the cause?
Is there a clock frequency for improving performance on the SMMU?
