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| author | Marc Zyngier <maz@kernel.org> | 2020-07-31 12:33:13 +0200 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-09-06 19:26:13 +0200 |
| commit | 5f774f5e12512b850a611aa99b4601d7eac50edb (patch) | |
| tree | eab4028e6b3798e90fdd04a4424f85124fcb8b7f /drivers/irqchip | |
| parent | irqchip/gic-v2, v3: Implement irq_chip->irq_retrigger() (diff) | |
| download | linux-5f774f5e12512b850a611aa99b4601d7eac50edb.tar.xz linux-5f774f5e12512b850a611aa99b4601d7eac50edb.zip | |
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@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3-its.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 95f097448f97..2808545a963e 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, }; |