ppc/xics: Add xics to the monitor "info pic" command

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Useful to debug interrupt problems.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[clg: - updated for qemu-2.7
      - added a test on ->irqs as it is not necessarily allocated
        (PHB3_MSI)
      - removed static variable g_xics and replace with a loop on all
        children to find the xics objects.
      - rebased on InterruptStatsProvider interface ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/intc/xics.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

On Mon, Oct 17, 2016 at 10:33:14PM +0200, Cédric Le Goater wrote:
> From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> 
> Useful to debug interrupt problems.
> 
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> [clg: - updated for qemu-2.7
>       - added a test on ->irqs as it is not necessarily allocated
>         (PHB3_MSI)
>       - removed static variable g_xics and replace with a loop on all
>         children to find the xics objects.
>       - rebased on InterruptStatsProvider interface ]
> Signed-off-by: Cédric Le Goater <clg@kaod.org>

Applied to ppc-for-2.8.

> ---
>  hw/intc/xics.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 49 insertions(+)
> 
> diff --git a/hw/intc/xics.c b/hw/intc/xics.c
> index f40b00003a45..7fac964fbd27 100644
> --- a/hw/intc/xics.c
> +++ b/hw/intc/xics.c
> @@ -35,6 +35,8 @@
>  #include "hw/ppc/xics.h"
>  #include "qemu/error-report.h"
>  #include "qapi/visitor.h"
> +#include "monitor/monitor.h"
> +#include "hw/intc/intc.h"
>  
>  int xics_get_cpu_index_by_dt_id(int cpu_dt_id)
>  {
> @@ -90,6 +92,47 @@ void xics_cpu_setup(XICSState *xics, PowerPCCPU *cpu)
>      }
>  }
>  
> +static void xics_common_pic_print_info(InterruptStatsProvider *obj,
> +                                       Monitor *mon)
> +{
> +    XICSState *xics = XICS_COMMON(obj);
> +    ICSState *ics;
> +    uint32_t i;
> +
> +    for (i = 0; i < xics->nr_servers; i++) {
> +        ICPState *icp = &xics->ss[i];
> +
> +        if (!icp->output) {
> +            continue;
> +        }
> +        monitor_printf(mon, "CPU %d XIRR=%08x (%p) PP=%02x MFRR=%02x\n",
> +                       i, icp->xirr, icp->xirr_owner,
> +                       icp->pending_priority, icp->mfrr);
> +    }
> +
> +    QLIST_FOREACH(ics, &xics->ics, list) {
> +        monitor_printf(mon, "ICS %4x..%4x %p\n",
> +                       ics->offset, ics->offset + ics->nr_irqs - 1, ics);
> +
> +        if (!ics->irqs) {
> +            continue;
> +        }
> +
> +        for (i = 0; i < ics->nr_irqs; i++) {
> +            ICSIRQState *irq = ics->irqs + i;
> +
> +            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);
> +        }
> +    }
> +}
> +
>  /*
>   * XICS Common class - parent for emulated XICS and KVM-XICS
>   */
> @@ -190,8 +233,10 @@ static void xics_common_initfn(Object *obj)
>  static void xics_common_class_init(ObjectClass *oc, void *data)
>  {
>      DeviceClass *dc = DEVICE_CLASS(oc);
> +    InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(oc);
>  
>      dc->reset = xics_common_reset;
> +    ic->print_info = xics_common_pic_print_info;
>  }
>  
>  static const TypeInfo xics_common_info = {
> @@ -201,6 +246,10 @@ static const TypeInfo xics_common_info = {
>      .class_size    = sizeof(XICSStateClass),
>      .instance_init = xics_common_initfn,
>      .class_init    = xics_common_class_init,
> +    .interfaces = (InterfaceInfo[]) {
> +        { TYPE_INTERRUPT_STATS_PROVIDER },
> +        { }
> +    },
>  };
>  
>  /*