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spapr: split the IRQ allocation sequence

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Today, when a device requests for IRQ number in a sPAPR machine, the
spapr_irq_alloc() routine first scans the ICSState status array to
find an empty slot and then performs the assignement of the selected
numbers. Split this sequence in two distinct routines : spapr_irq_find()
for lookups and spapr_irq_claim() for claiming the IRQ numbers.

This will ease the introduction of a static layout of IRQ numbers.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2018-06-18 19:34:00 +02:00 • committed by David Gibson
parent 24c6863c7b
commit 4fe75a8ccd
5 changed files with 97 additions and 8 deletions
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10
hw/ppc/spapr_vio.c
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@ -475,7 +475,15 @@ static void spapr_vio_busdev_realize(DeviceState *qdev, Error **errp)
dev->qdev.id = id;
}
dev->irq = spapr_irq_alloc(spapr, dev->irq, false, &local_err);
if (!dev->irq) {
dev->irq = spapr_irq_findone(spapr, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
spapr_irq_claim(spapr, dev->irq, false, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;