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irqchip/git-v3-its: Implement irq_retrigger callback for device-triggered LPIs

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It is pretty easy to provide a retrigger callback for the ITS,
as it we already have the required support in terms of
irq_set_irqchip_state().

Note that this only works for device-generated LPIs, and not
the GICv4 doorbells, which should never have to be retriggered
anyway.

Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2020-07-31 11:33:13 +01:00
parent 17f644e949
commit 5f774f5e12
1 changed files with 6 additions and 0 deletions
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6
drivers/irqchip/irq-gic-v3-its.c
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@ -1720,6 +1720,11 @@ static int its_irq_set_irqchip_state(struct irq_data *d,
return 0;
}
static int its_irq_retrigger(struct irq_data *d)
{
return !its_irq_set_irqchip_state(d, IRQCHIP_STATE_PENDING, true);
}
/*
* Two favourable cases:
*
@ -1971,6 +1976,7 @@ static struct irq_chip its_irq_chip = {
.irq_set_affinity = its_set_affinity,
.irq_compose_msi_msg = its_irq_compose_msi_msg,
.irq_set_irqchip_state = its_irq_set_irqchip_state,
.irq_retrigger = its_irq_retrigger,
.irq_set_vcpu_affinity = its_irq_set_vcpu_affinity,
};