[bradfa]

i.MX6 uses Cortex-A9 cores so is affected by spectre. ARM has some good info on how to deal with it: https://developer.arm.com/support/security-update

i.MX8M will use Cortex-A53 cores so is not affected by spectre.

EDIT: Clarified that i.MX8M only has Cortex-A53 cores. Some i.MX8 parts will have Cortex-A72 cores which are affected by spectre. i.MX8M is the version discussed by Purism's post.

[j_s]

Thanks much for investing the time to carefully reply!