Re: https://firmwaresecurity.com/2018/01/26/arm-linaro-on-meltdown-and-spectre/
the second blog post is out, covering Spectre/Meltdown impact on: UEFI, ARM Trusted Firmware, U-Boot, OP-TEE, and Linux kernel. Good reading!
https://www.linaro.org/blog/meltdown-spectre-2/