Re: [RFC PATCH V2 16/18] x86/sev: Initialize #HV doorbell and handle interrupt requests

[Gupta, Pankaj]

On 12/8/2022 3:21 PM, Tianyu Lan wrote:
> On 12/7/2022 10:13 PM, Gupta, Pankaj wrote:
> > > +#endif
> > > +}
> > > +
> > >   static __always_inline void native_irq_disable(void)
> > >   {
> > >       asm volatile("cli": : :"memory");
> > > @@ -43,6 +59,9 @@ static __always_inline void native_irq_disable(void)
> > >   static __always_inline void native_irq_enable(void)
> > >   {
> > >       asm volatile("sti": : :"memory");
> > > +#ifdef CONFIG_AMD_MEM_ENCRYPT
> > > +    check_hv_pending(NULL);
> >
> > Just trying to understand when regs will be NULL?
>
> check_hv_pending() will be divided into two functions.
>
> The one handles #hv event in the #HV exception code path.
> The other one handles pending irq event in the irq re-enable
> code path。 In this version, the "regs = NULL" for check_hv_pending()
> is used in the irq re-enable code path.

Got it.

Thanks,
Pankaj