Re: [PATCH v16 8/8] x86/smpboot: Allow parallel bringup for SEV-ES

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On Thu, Mar 23, 2023 at 5:04 AM David Woodhouse <dwmw2@xxxxxxxxxxxxx> wrote:
>
> On Thu, 2023-03-23 at 09:51 +0100, Borislav Petkov wrote:
> > On Thu, Mar 23, 2023 at 08:32:49AM +0000, David Woodhouse wrote:
> > > and maybe find some other stuff to cargo-cult to make it safe to run
> > > C code that early...
> >
> > I'm trying to have less shit asm, not more if possible. We've been
> > aiming to convert stuff to C for years.
>
> Absolutely, I understand. There are a few hoops we have to jump through
> to be able to run C code this early, but it's worth it.
>
> > WTF are you calling cargo-cult?
>
> Off the top of my head, I don't actually *remember* all the hoops we
> have to jump through to run C code this early.

Making sure that the stack protector is either disabled or properly
set up, and disabling any instrumentation/profiling/debug crap that
isn't initialized yet.

--
Brian Gerst




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