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| author | Marc Zyngier <marc.zyngier@arm.com> | 2017-06-23 21:42:57 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2017-08-23 11:09:14 +0100 |
| commit | 0abce64a55ae44d39b92f8e672736f4f324e610f (patch) | |
| tree | 8a95c64171ac618a93e2b93421d4ef86f370e5cc /kernel/irq | |
| parent | e81f54c668d89e50bad38f3fc4c5ea6e4be3a96e (diff) | |
| download | linux-0abce64a55ae44d39b92f8e672736f4f324e610f.tar.gz | |
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: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/manage.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 1d1a5b945ab4..573dc52b0806 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -400,8 +400,18 @@ int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info) return -EINVAL; data = irq_desc_get_irq_data(desc); - chip = irq_data_get_irq_chip(data); - if (chip && chip->irq_set_vcpu_affinity) + do { + 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); irq_put_desc_unlock(desc, flags); |