Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

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

kernel/irq/manage.c

+12 −2
Original line number Original line Diff line number Diff line
@@ -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);

	do {

		chip = irq_data_get_irq_chip(data);

		chip = irq_data_get_irq_chip(data);

		if (chip && chip->irq_set_vcpu_affinity)

		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);