Re: [PATCH] spapr/xive: remove redundant check in spapr_match_nvt()

[David Gibson <david@gibson.dropbear.id.au>]

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On Mon, Jan 06, 2020 at 06:29:31PM +0100, Greg Kurz wrote:
> On Mon,  6 Jan 2020 17:32:07 +0100
> Cédric Le Goater <clg@kaod.org> wrote:
> 
> > spapr_match_nvt() is a XIVE operation and it used by the machine to
> 
> ... and it "is" used by the machine...

Adjusted in my tree.

> 
> > look for a matching target when an event notification is being
> > delivered. An assert checks that spapr_match_nvt() is called only when
> > the machine has selected the XIVE interrupt mode but it is redundant
> > with the XIVE_PRESENTER() dynamic cast.
> > 
> > Apply the cast to spapr->active_intc and remove the assert.
> > 
> > Signed-off-by: Cédric Le Goater <clg@kaod.org>
> > ---
> 
> Reviewed-by: Greg Kurz <groug@kaod.org>
> 
> >  hw/ppc/spapr.c | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> > index e62c89b3dd40..5008b7563173 100644
> > --- a/hw/ppc/spapr.c
> > +++ b/hw/ppc/spapr.c
> > @@ -4198,19 +4198,19 @@ static void spapr_pic_print_info(InterruptStatsProvider *obj,
> >                     kvm_irqchip_in_kernel() ? "in-kernel" : "emulated");
> >  }
> >  
> > +/*
> > + * This is a XIVE only operation
> > + */
> >  static int spapr_match_nvt(XiveFabric *xfb, uint8_t format,
> >                             uint8_t nvt_blk, uint32_t nvt_idx,
> >                             bool cam_ignore, uint8_t priority,
> >                             uint32_t logic_serv, XiveTCTXMatch *match)
> >  {
> >      SpaprMachineState *spapr = SPAPR_MACHINE(xfb);
> > -    XivePresenter *xptr = XIVE_PRESENTER(spapr->xive);
> > +    XivePresenter *xptr = XIVE_PRESENTER(spapr->active_intc);
> >      XivePresenterClass *xpc = XIVE_PRESENTER_GET_CLASS(xptr);
> >      int count;
> >  
> > -    /* This is a XIVE only operation */
> > -    assert(spapr->active_intc == SPAPR_INTC(spapr->xive));
> > -
> >      count = xpc->match_nvt(xptr, format, nvt_blk, nvt_idx, cam_ignore,
> >                             priority, logic_serv, match);
> >      if (count < 0) {
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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