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spapr: increase the size of the IRQ number space

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The new layout using static IRQ number does not leave much space to
the dynamic MSI range, only 0x100 IRQ numbers. Increase the total
number of IRQS for newer machines and introduce a legacy XICS backend
for pre-3.1 machines to maintain compatibility.

For the old backend, provide a 'nr_msis' value covering the full IRQ
number space as it does not use the bitmap allocator to allocate MSI
interrupt numbers.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2018-09-11 07:55:03 +02:00 • committed by David Gibson
parent e39de895f6
commit ae83740237
3 changed files with 16 additions and 1 deletions
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1
include/hw/ppc/spapr_irq.h
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@ -41,6 +41,7 @@ typedef struct sPAPRIrq {
} sPAPRIrq;
extern sPAPRIrq spapr_irq_xics;
extern sPAPRIrq spapr_irq_xics_legacy;
int spapr_irq_claim(sPAPRMachineState *spapr, int irq, bool lsi, Error **errp);
void spapr_irq_free(sPAPRMachineState *spapr, int irq, int num);