On Wed, Jan 08, 2025 at 11:43:14AM -0800, Jim Mattson wrote:
> > We don't need safe-RET with SRSO_USER_KERNEL_NO=1. And there's no safe-RET for
> > virt only. So IBPB-on-VMEXIT is the next best thing. The good thing is, those
> > machines have BpSpecReduce too so you won't be doing IBPB-on-VMEXIT either but
> > what we're talking about here - BpSpecReduce.
>
> I'm suggesting that IBPB-on-VMexit is probably the *worst* thing.
I know what you're suggesting and I don't think so but I'd need to look at the
numbers.
> If it weren't for BpSpecReduce, I would want safe-RET for virt only.
Read my reply again.
> (Well, if it weren't for ASI, I would want that, anyway.)
I'm sure Brendan is waiting for reviews there.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
