Re: [PATCH v3 34/43] hw/intc: Add LoongArch extioi interrupt controller(EIOINTC)

[yangxiaojuan]

On 2022/5/10 上午1:56, Richard Henderson wrote:

> > > > +    case
> > > >             EXTIOI_IPMAP_START ... EXTIOI_IPMAP_END - 1:
> > > >             
> > > >             +        index = (offset - EXTIOI_IPMAP_START) >> 2;
> > > >             
> > > >             +        s->ipmap[index] = val;
> > > >             
> > > >             +        break;
> > > >             
> > > >           
> > >           
> > >           Do you need to recompute the entire interrupt map when ipmap
> > >           changes?
> > >           
> > >           
> > >         
> >         Sorry, could you explain it in more detail? i can not understand
> >         the meanning of 'the entire interrupt map'?
> >         
> >       
>       
>       I mean, ipmap[*] and coremap[*] controls how isr[*] maps to the
>       various cpus, as coreisr[*].  If either ipmap or coremap changes,
>       do you need to re-compute coreisr[*] from the input isr[*]?
>     
     
    I think the interrupt has been handled by the core before set
    coremap or ipmap, and coreisr[*] also has been set and cleard by
    original core. 
    So,  the new mapped core need not  to update the coreisr[*].
    
    Thanks.
    Xiaojuan