Re: [PATCH v3 0/3] SRF: Fix offline CPU preventing pc6 entry

[Patryk Wlazlyn]

> That's not really working:
>
>   1) Regular kexec offlines them again.

But then, they execute hlt loop in the reboot vector right?
I think that's fine. We just don't want to be woken up from the mwait
when the RIP points to garbage.

>   2) Kexec in panic can't do any of that.

Does it make sense to change the kexec, so that every CPU is forced
into the reboot vector, which I believe happens for online CPUs?
We don't have to online them all the way. Maybe minimal bringup just
to be able to send them the IPI?

As a side note, It's not that important for this patchset. I think I
can make it work without simplifying the existing hack, but crossed my
mind at some point that maybe we could do that.