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spapr: extend the sPAPR IRQ backend for XICS migration

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Introduce a new sPAPR IRQ handler to handle resend after migration
when the machine is using a KVM XICS interrupt controller model.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2018-12-11 23:38:16 +01:00 • committed by David Gibson
parent 1a937ad7e7
commit 1c53b06c03
3 changed files with 34 additions and 8 deletions
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27
hw/ppc/spapr_irq.c
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@ -197,6 +197,18 @@ static Object *spapr_irq_cpu_intc_create_xics(sPAPRMachineState *spapr,
return icp_create(cpu, spapr->icp_type, XICS_FABRIC(spapr), errp);
}
static int spapr_irq_post_load_xics(sPAPRMachineState *spapr, int version_id)
{
if (!object_dynamic_cast(OBJECT(spapr->ics), TYPE_ICS_KVM)) {
CPUState *cs;
CPU_FOREACH(cs) {
PowerPCCPU *cpu = POWERPC_CPU(cs);
icp_resend(ICP(cpu->intc));
}
}
return 0;
}
#define SPAPR_IRQ_XICS_NR_IRQS 0x1000
#define SPAPR_IRQ_XICS_NR_MSIS \
(XICS_IRQ_BASE + SPAPR_IRQ_XICS_NR_IRQS - SPAPR_IRQ_MSI)
@ -212,6 +224,7 @@ sPAPRIrq spapr_irq_xics = {
.print_info = spapr_irq_print_info_xics,
.dt_populate = spapr_dt_xics,
.cpu_intc_create = spapr_irq_cpu_intc_create_xics,
.post_load = spapr_irq_post_load_xics,
};
/*
@ -295,6 +308,11 @@ static Object *spapr_irq_cpu_intc_create_xive(sPAPRMachineState *spapr,
return xive_tctx_create(cpu, XIVE_ROUTER(spapr->xive), errp);
}
static int spapr_irq_post_load_xive(sPAPRMachineState *spapr, int version_id)
{
return 0;
}
/*
* XIVE uses the full IRQ number space. Set it to 8K to be compatible
* with XICS.
@ -314,6 +332,7 @@ sPAPRIrq spapr_irq_xive = {
.print_info = spapr_irq_print_info_xive,
.dt_populate = spapr_dt_xive,
.cpu_intc_create = spapr_irq_cpu_intc_create_xive,
.post_load = spapr_irq_post_load_xive,
};
/*
@ -352,6 +371,13 @@ qemu_irq spapr_qirq(sPAPRMachineState *spapr, int irq)
return smc->irq->qirq(spapr, irq);
}
int spapr_irq_post_load(sPAPRMachineState *spapr, int version_id)
{
sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
return smc->irq->post_load(spapr, version_id);
}
/*
* XICS legacy routines - to deprecate one day
*/
@ -420,4 +446,5 @@ sPAPRIrq spapr_irq_xics_legacy = {
.print_info = spapr_irq_print_info_xics,
.dt_populate = spapr_dt_xics,
.cpu_intc_create = spapr_irq_cpu_intc_create_xics,
.post_load = spapr_irq_post_load_xics,
};