On 5/18/20 7:01 AM, H.J. Lu wrote:

quoted

Could some of this information be added to the documentation, please?
It would also be nice to have some more details about how apps end up
using ARCH_X86_CET_STATUS.  Why would they care that CET is on?

CET software spec is at

https://gitlab.com/x86-psABIs/x86-64-ABI/-/wikis/Intel-CET-extension

My CET presentation at 2018 LPC is at

https://www.linuxplumbersconf.org/event/2/contributions/147/attachments/72/83/CET-LPC-2018.pdf

I am working on an updated CET presentation for 2020 LPC.  Let me know
if you want to see the early draft.

There's a lot of great information in there!

However, please remember that presentations are no substitute for old
fashioned documentation in the kernel tree and changelogs.  The fact
that we need to lean on them to answer basic questions about new
interfaces is not a great sign.