On Sat, Aug 5, 2017 at 10:34 AM, Lukas Wunner <lu...@wunner.de> wrote: > Just an innocent question from a bystander, what's the downside of > unconditionally requesting that memory be overwritten? Does it > prolong reboot noticeably?
Yes, it's just to avoid stalling reboot for as long as it takes to clear RAM. > I've also wondered why you've chosen to put this in a separate file > rather than the existing secureboot.c, my naive understanding is that > TPM and SecureBoot is related but I'm not an expert on this. It would > allow you to reuse the existing get_efi_var() macro. It's not related to Secure Boot (systems can have TPMs but not Secure Boot, and vice versa), the spec is managed by a different body (TCG rather than UEFI), and there'll be more TPM-related code for the boot stub in future.
