Re: [Qemu-devel] [RFC PATCH 11/26] ppc/xics: introduce a print_info() handler to the ICS and ICP objects

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

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On Mon, Jul 24, 2017 at 03:58:50PM +0200, Cédric Le Goater wrote:
> On 07/24/2017 07:13 AM, David Gibson wrote:
> > On Wed, Jul 05, 2017 at 07:13:24PM +0200, Cédric Le Goater wrote:
> >> This handler will be used to customize the ouput of the XIVE interrupt
> >> source and presenter objects.
> > 
> > I'm not really happy with this without having a clear idea of where
> > this is heading - are you trying to share ICP and or ICS object
> > classes between XICS and XIVE, or will they eventually be separated
> > again?
> 
> Because of the XICSFabric interface of the sPAPR machine, we need 
> to use ICPState and ICSState objects. 

Yeah, I don't think we do.  See further comments elsewhere

> sPAPR is strongly tied to ICPState and it is complex to introduce 
> a new ICPState class for the sPAPR machine. We did introduce a new 
> class in the past but that was for a new machine : PowerNV.
> So I think we should just add a couple of attributes to ICPState
> to support XIVE. That is not what the patchset does but I have
> made progress since with hotplug and migration and came to that
> conclusion. The consequence is that the print_info() handler is 
> now obsolete for ICPs and we will need to find another way to 
> customize the output.
> 
> For the interrupt source, the constraints are less strong, adding 
> a new ICSState class seems like a good option and so does the 
> print_info() handler.
> 
> Thanks,
> 
> C. 
> 
> 
> >>
> >> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> >> ---
> >>  hw/intc/xics.c        | 36 ++++++++++++++++++++++++------------
> >>  include/hw/ppc/xics.h |  2 ++
> >>  2 files changed, 26 insertions(+), 12 deletions(-)
> >>
> >> diff --git a/hw/intc/xics.c b/hw/intc/xics.c
> >> index faa5c631f655..7837c2022b4a 100644
> >> --- a/hw/intc/xics.c
> >> +++ b/hw/intc/xics.c
> >> @@ -40,18 +40,26 @@
> >>  
> >>  void icp_pic_print_info(ICPState *icp, Monitor *mon)
> >>  {
> >> +    ICPStateClass *k = ICP_GET_CLASS(icp);
> >>      int cpu_index = icp->cs ? icp->cs->cpu_index : -1;
> >>  
> >>      if (!icp->output) {
> >>          return;
> >>      }
> >> -    monitor_printf(mon, "CPU %d XIRR=%08x (%p) PP=%02x MFRR=%02x\n",
> >> -                   cpu_index, icp->xirr, icp->xirr_owner,
> >> -                   icp->pending_priority, icp->mfrr);
> >> +
> >> +    monitor_printf(mon, "CPU %d ", cpu_index);
> >> +    if (k->print_info) {
> >> +        k->print_info(icp, mon);
> >> +    } else {
> >> +        monitor_printf(mon, "XIRR=%08x (%p) PP=%02x MFRR=%02x\n",
> >> +                       icp->xirr, icp->xirr_owner,
> >> +                       icp->pending_priority, icp->mfrr);
> >> +    }
> >>  }
> >>  
> >>  void ics_pic_print_info(ICSState *ics, Monitor *mon)
> >>  {
> >> +    ICSStateClass *k = ICS_BASE_GET_CLASS(ics);
> >>      uint32_t i;
> >>  
> >>      monitor_printf(mon, "ICS %4x..%4x %p\n",
> >> @@ -61,17 +69,21 @@ void ics_pic_print_info(ICSState *ics, Monitor *mon)
> >>          return;
> >>      }
> >>  
> >> -    for (i = 0; i < ics->nr_irqs; i++) {
> >> -        ICSIRQState *irq = ics->irqs + i;
> >> +    if (k->print_info) {
> >> +        k->print_info(ics, mon);
> >> +    } else {
> >> +        for (i = 0; i < ics->nr_irqs; i++) {
> >> +            ICSIRQState *irq = ics->irqs + i;
> >>  
> >> -        if (!(irq->flags & XICS_FLAGS_IRQ_MASK)) {
> >> -            continue;
> >> +            if (!(irq->flags & XICS_FLAGS_IRQ_MASK)) {
> >> +                continue;
> >> +            }
> >> +            monitor_printf(mon, "  %4x %s %02x %02x\n",
> >> +                           ics->offset + i,
> >> +                           (irq->flags & XICS_FLAGS_IRQ_LSI) ?
> >> +                           "LSI" : "MSI",
> >> +                           irq->priority, irq->status);
> >>          }
> >> -        monitor_printf(mon, "  %4x %s %02x %02x\n",
> >> -                       ics->offset + i,
> >> -                       (irq->flags & XICS_FLAGS_IRQ_LSI) ?
> >> -                       "LSI" : "MSI",
> >> -                       irq->priority, irq->status);
> >>      }
> >>  }
> >>  
> >> diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
> >> index 28d248abad61..902f3bfd0e33 100644
> >> --- a/include/hw/ppc/xics.h
> >> +++ b/include/hw/ppc/xics.h
> >> @@ -69,6 +69,7 @@ struct ICPStateClass {
> >>      void (*pre_save)(ICPState *icp);
> >>      int (*post_load)(ICPState *icp, int version_id);
> >>      void (*reset)(ICPState *icp);
> >> +    void (*print_info)(ICPState *icp, Monitor *mon);
> >>  };
> >>  
> >>  struct ICPState {
> >> @@ -119,6 +120,7 @@ struct ICSStateClass {
> >>      void (*reject)(ICSState *s, uint32_t irq);
> >>      void (*resend)(ICSState *s);
> >>      void (*eoi)(ICSState *s, uint32_t irq);
> >> +    void (*print_info)(ICSState *s, Monitor *mon);
> >>  };
> >>  
> >>  struct ICSState {
> > 
> 

-- 
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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