Security Engine is Offline

[prabhu.an]

Hello,

On dev kit I enabled Disk Encryption, following these instructions Disk Encryption — NVIDIA Jetson Linux Developer Guide 1 documentation.

I can see that crypt root and UDA are both unlocked and mounted.

My assumption is that hardware acceleration enabled by security engine (dm-crypt ->tegra-crypto) will be used while reading and writing from emmc. But from jetson GUI I see SE is offline while I was running tests with fio tool. Attached screenshot.

Any suggestion how I can enable and verify hardware acceleration (not CPU) is being used while reading/writing?

[KevinFFF]

Hi prabhu.an,

What’s your Jetpack version in use?

Can you share the result of the following command on your board?

$ sudo cat /sys/kernel/debug/clk/se/clk_rate 

[prabhu.an]

cat /etc/nv_tegra_release
# R36 (release), REVISION: 3.0, GCID: 36191598, BOARD: generic, EABI: aarch64, DATE: Mon May  6 17:34:21 UTC 2024
# KERNEL_VARIANT: oot
TARGET_USERSPACE_LIB_DIR=nvidia
TARGET_USERSPACE_LIB_DIR_PATH=usr/lib/aarch64-linux-gnu/nvidia

sudo cat /sys/kernel/debug/clk/se/clk_rate
473600000

[KevinFFF]

It seems not the expected result to me that there’s the clk_rate reading in sysfs node but it shows offline on Jetson Power UI.
Could you share the detailed steps how you setup the devkit?