Re: [PATCH 02/16] KVM: x86/mmu: Introduce a slot flag to zap only slot leafs on slot deletion

Edgecombe, Rick P
2024-05-16T02:21:49Z

On Wed, 2024-05-15 at 16:56 -0700, Rick Edgecombe wrote:
>
> If we think it is not a security issue, and we don't even know if it can be
> hit
> for TDX, then I'd be included to go with (a). Especially since we are just
> aiming for the most basic support, and don't have to worry about regressions
> in
> the classical sense.
>
> I'm not sure how easy it will be to root cause it at this point. Hopefully Yan
> will be coming online soon. She mentioned some previous Intel effort to
> investigate it. Presumably we would have to start with the old kernel that
> exhibited the issue. If it can still be found...
>

Weijiang filled me in. It sounds like a really tough one, as he described: "From
my experience, to reproduce the issue, it requires specific HW config + specific
SW + specific operations, I almost died on it"

If it shows up in TDX, we might get lucky with an easier reproducer...