Re: [Qemu-devel] [PATCH 3/3] spapr: make irq customizable via qdev

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

On Tue, May 24, 2011 at 01:45:07PM +0200, Paolo Bonzini wrote:
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Alexander Graf <agraf@suse.de>
> Cc: David Gibson <david@gibson.dropbear.id.au>
> ---
>  hw/spapr_vio.c |    8 +++++++-
>  1 files changed, 7 insertions(+), 1 deletions(-)
> 
> diff --git a/hw/spapr_vio.c b/hw/spapr_vio.c
> index be535d6..fee4c46 100644
> --- a/hw/spapr_vio.c
> +++ b/hw/spapr_vio.c
> @@ -52,6 +52,10 @@
>  static struct BusInfo spapr_vio_bus_info = {
>      .name       = "spapr-vio",
>      .size       = sizeof(VIOsPAPRBus),
> +    .props = (Property[]) {
> +        DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, vio_irq_num, 0), \
> +        DEFINE_PROP_END_OF_LIST(),
> +    },
>  };

I don't see what the point of this is.  Absolute irq numbers have no
special meaning in the XICS context, and the guest kernel will remap
them to virtual irqs anyway.


>  VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
> @@ -604,7 +608,9 @@ static int spapr_vio_busdev_init(DeviceState *qdev, DeviceInfo *qinfo)
>      }
>  
>      dev->qdev.id = id;
> -    dev->vio_irq_num = bus->irq++;
> +    if (!dev->vio_irq_num) {
> +        dev->vio_irq_num = bus->irq++;
> +    }
>      dev->qirq = xics_find_qirq(spapr->icp, dev->vio_irq_num);
>  
>      rtce_init(dev);

-- 
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