> --- a/hw/ppc/spapr_vio.c
> +++ b/hw/ppc/spapr_vio.c
> @@ -436,6 +436,9 @@ static void spapr_vio_busdev_reset(DeviceState *qdev)
> }
> }
>
> +/* TODO : poor VIO device indexing ... */
> +static uint32_t vio_index;
I think we could also use (dev->reg & 0xff) as an index for
the VIO devices.
The unit address of the virtual IOA is simply allocated using
an increment of bus->next_reg, next_reg being initialized at
0x71000000.
I did not see any restrictions in the PAPR specs or in QEMU
that would break the above.
C.
> static void spapr_vio_busdev_realize(DeviceState *qdev, Error **errp)
> {
> sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
> @@ -476,10 +479,18 @@ static void spapr_vio_busdev_realize(DeviceState *qdev,
> Error **errp)
> }
>
> if (!dev->irq) {
> - dev->irq = spapr_irq_findone(spapr, &local_err);
> - if (local_err) {
> - error_propagate(errp, local_err);
> - return;
> + if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
> + dev->irq = spapr_irq_findone(spapr, &local_err);
> + if (local_err) {
> + error_propagate(errp, local_err);
> + return;
> + }
> + } else {
> + dev->irq = SPAPR_IRQ_VIO + vio_index++;
> + if (dev->irq == SPAPR_IRQ_PCI_LSI) {
> + error_setg(errp, "Too many VIO devices");
> + return;
> + }
