Re: [RFC PATCH V3 16/16] x86/sev: Fix interrupt exit code paths from #HV exception

[Tianyu Lan]

On 2/22/2023 12:44 AM, Gupta, Pankaj wrote:
> > @@ -2529,3 +2537,25 @@ static int __init snp_init_platform_device(void)
> >       return 0;
> >   }
> >   device_initcall(snp_init_platform_device);
> > +
> > +noinstr void irqentry_exit_hv_cond(struct pt_regs *regs, 
> > irqentry_state_t state)
> > +{
>
> This code path is being called even for the guest without SNP. Ran
> a SEV guest and guest crashed in this code path. Checking & returning
> made guest (non SNP) to boot with some call traces. But this branch 
> needs to be avoided for non-SNP guests and host as well.

Nice catch! I will fix it in the next version.

Thanks.