Commit 0abce64a authored by Marc Zyngier's avatar Marc Zyngier

genirq: Let irq_set_vcpu_affinity() iterate over hierarchy

When assigning an interrupt to a vcpu, it is not unlikely that
the level of the hierarchy implementing irq_set_vcpu_affinity
is not the top level (think a generic MSI domain on top of a
virtualization aware interrupt controller).

In such a case, let's iterate over the hierarchy until we find
an irqchip implementing it.
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent e81f54c6
...@@ -400,8 +400,18 @@ int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info) ...@@ -400,8 +400,18 @@ int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info)
return -EINVAL; return -EINVAL;
data = irq_desc_get_irq_data(desc); data = irq_desc_get_irq_data(desc);
chip = irq_data_get_irq_chip(data); do {
if (chip && chip->irq_set_vcpu_affinity) chip = irq_data_get_irq_chip(data);
if (chip && chip->irq_set_vcpu_affinity)
break;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
data = data->parent_data;
#else
data = NULL;
#endif
} while (data);
if (data)
ret = chip->irq_set_vcpu_affinity(data, vcpu_info); ret = chip->irq_set_vcpu_affinity(data, vcpu_info);
irq_put_desc_unlock(desc, flags); irq_put_desc_unlock(desc, flags);
......
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