The following commit has been merged into the irq/core branch of tip:
Commit-ID: 5f774f5e12512b850a611aa99b4601d7eac50edb
Gitweb: https://git.kernel.org/tip/5f774f5e12512b850a611aa99b4601d7eac50edb
Author: Marc Zyngier <maz@xxxxxxxxxx>
AuthorDate: Fri, 31 Jul 2020 11:33:13 +01:00
Committer: Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Sun, 06 Sep 2020 18:26:13 +01:00
irqchip/git-v3-its: Implement irq_retrigger callback for device-triggered LPIs
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@xxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
drivers/irqchip/irq-gic-v3-its.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 95f0974..2808545 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -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,
};
|