Disk encryption exhibits High CPU usage in JetPack 5.1.2 (using Orin AGX)

[robdamico14]

I enabled disk encryption on an Orin AGX devkit using JetPack 5.1.2. While running tests with ‘dd’ on the encrypted partitions, the CPU usage is much higher than I expected (30-70% per core on all 8 cores). Is the hardware acceleration enabled in 5.1.2?

I saw this topic regarding l4t 36.3 (JetPack 6.0).

Device tree for Orin NX in L4T R36.3 missing nodes for tegra-se

I noticed on my Orin NX unit the HW crypto (tegra-se) driver wasn’t being activated, and it turns out it’s because the necessary device tree nodes are missing for that SKU but present for all others. Copying those nodes causes the HW crypto to be loaded and used. Was this an oversight or is there a reason why these nodes are missing?

I confirmed that the device tree nodes are there for the Orin AGX devkit, but I’m wondering if the driver code is there to support it.

[DaneLLL]

Hi,
The hardware se engine is enabled and certain executions are on hardware engine. And still some executions are on CPU. It is expected to have higher CPU usage when comparing to no disk encryption.

[robdamico14]

@DaneLLL would you expect lighter CPU usage using a different cipher? What about using a newer version of JetPack (have there been any optimizations)?