Re: [Question PATCH kernel] x86/amd/sev/nmi+vc: Fix stack handling (why is this happening?)

[Joerg Roedel]

On Fri, Jan 27, 2023 at 10:08:14AM +0100, Peter Zijlstra wrote:
> Welcome to the wonderful shit show that is x86 exceptions :/
> 
> I thought sev_es_*() is supposed to fix this. Joerg, any clue?

Hmm, no, not yet, the stack-trace doesn't make much sense to me. The
sev_es_* function calls in the NMI path are for re-enabling NMI and
adjusting the #VC IST stack to allow nested VCs.

Alexey, can you try to get a more stable backtrace? For example by
building the kernel with frame pointers?

Regards,

	Joerg