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spapr: introduce a spapr_irq_set_lsi() helper 

It will make synchronisation easier with the XIVE interrupt mode when
available. The 'irq' parameter refers to the global IRQ number space.

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 2017-12-01 17:06:03 +01:00 committed by David Gibson
parent 60c6823b9b
commit 9e7dc5fc2e
1 changed files with 12 additions and 4 deletions
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16
hw/ppc/spapr.c
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@ -3582,6 +3582,14 @@ static int ics_find_free_block(ICSState *ics, int num, int alignnum)
return -1;
}
/*
* Allocate the IRQ number and set the IRQ type, LSI or MSI
*/
static void spapr_irq_set_lsi(sPAPRMachineState *spapr, int irq, bool lsi)
{
ics_set_irq_type(spapr->ics, irq - spapr->ics->offset, lsi);
}
int spapr_irq_alloc(sPAPRMachineState *spapr, int irq_hint, bool lsi,
Error **errp)
{
@ -3606,7 +3614,7 @@ int spapr_irq_alloc(sPAPRMachineState *spapr, int irq_hint, bool lsi,
irq += ics->offset;
}
ics_set_irq_type(ics, irq - ics->offset, lsi);
spapr_irq_set_lsi(spapr, irq, lsi);
trace_spapr_irq_alloc(irq);
return irq;
@ -3645,10 +3653,10 @@ int spapr_irq_alloc_block(sPAPRMachineState *spapr, int num, bool lsi,
return -1;
}
for (i = first; i < first + num; ++i) {
ics_set_irq_type(ics, i, lsi);
}
first += ics->offset;
for (i = first; i < first + num; ++i) {
spapr_irq_set_lsi(spapr, i, lsi);
}
trace_spapr_irq_alloc_block(first, num, lsi, align);