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powerpc/xics: Fix IRQ migration

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desc->irq_data points to the top level IRQ data descriptor which is
not necessarily in the XICS IRQ domain. MSIs are in another domain for
instance. Fix that by looking for a mapping on the low level XICS IRQ
domain.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210701132750.1475580-28-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2021-07-01 15:27:45 +02:00 committed by Michael Ellerman
parent f1a377f86f
commit c80198a217
1 changed files with 7 additions and 2 deletions
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9
arch/powerpc/sysdev/xics/xics-common.c
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@ -183,6 +183,8 @@ void xics_migrate_irqs_away(void)
unsigned int irq, virq;
struct irq_desc *desc;
pr_debug("%s: CPU %u\n", __func__, cpu);
/* If we used to be the default server, move to the new "boot_cpuid" */
if (hw_cpu == xics_default_server)
xics_update_irq_servers();
@ -197,6 +199,7 @@ void xics_migrate_irqs_away(void)
struct irq_chip *chip;
long server;
unsigned long flags;
struct irq_data *irqd;
/* We can't set affinity on ISA interrupts */
if (virq < NR_IRQS_LEGACY)
@ -204,9 +207,11 @@ void xics_migrate_irqs_away(void)
/* We only need to migrate enabled IRQS */
if (!desc->action)
continue;
if (desc->irq_data.domain != xics_host)
/* We need a mapping in the XICS IRQ domain */
irqd = irq_domain_get_irq_data(xics_host, virq);
if (!irqd)
continue;
irq = desc->irq_data.hwirq;
irq = irqd_to_hwirq(irqd);
/* We need to get IPIs still. */
if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS)
continue;