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Merge remote-tracking branch 'origin/irq/gic-retrigger' into irq/irqchip-next

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Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2020-09-17 16:50:02 +01:00
commit eff65bd439
4 changed files with 41 additions and 4 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,
};

12
drivers/irqchip/irq-gic-v3.c
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@ -1221,6 +1221,11 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
#define gic_smp_init() do { } while(0)
#endif
static int gic_retrigger(struct irq_data *data)
{
return !gic_irq_set_irqchip_state(data, IRQCHIP_STATE_PENDING, true);
}
#ifdef CONFIG_CPU_PM
static int gic_cpu_pm_notifier(struct notifier_block *self,
unsigned long cmd, void *v)
@ -1256,6 +1261,7 @@ static struct irq_chip gic_chip = {
.irq_eoi = gic_eoi_irq,
.irq_set_type = gic_set_type,
.irq_set_affinity = gic_set_affinity,
.irq_retrigger = gic_retrigger,
.irq_get_irqchip_state = gic_irq_get_irqchip_state,
.irq_set_irqchip_state = gic_irq_set_irqchip_state,
.irq_nmi_setup = gic_irq_nmi_setup,
@ -1273,6 +1279,7 @@ static struct irq_chip gic_eoimode1_chip = {
.irq_eoi = gic_eoimode1_eoi_irq,
.irq_set_type = gic_set_type,
.irq_set_affinity = gic_set_affinity,
.irq_retrigger = gic_retrigger,
.irq_get_irqchip_state = gic_irq_get_irqchip_state,
.irq_set_irqchip_state = gic_irq_set_irqchip_state,
.irq_set_vcpu_affinity = gic_irq_set_vcpu_affinity,
@ -1288,6 +1295,7 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
struct irq_chip *chip = &gic_chip;
struct irq_data *irqd = irq_desc_get_irq_data(irq_to_desc(irq));
if (static_branch_likely(&supports_deactivate_key))
chip = &gic_eoimode1_chip;
@ -1312,7 +1320,7 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_domain_set_info(d, irq, hw, chip, d->host_data,
handle_fasteoi_irq, NULL, NULL);
irq_set_probe(irq);
irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
irqd_set_single_target(irqd);
break;
case LPI_RANGE:
@ -1326,6 +1334,8 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
return -EPERM;
}
/* Prevents SW retriggers which mess up the ACK/EOI ordering */
irqd_set_handle_enforce_irqctx(irqd);
return 0;
}

12
drivers/irqchip/irq-gic.c
View File

@ -326,6 +326,11 @@ static int gic_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu)
return 0;
}
static int gic_retrigger(struct irq_data *data)
{
return !gic_irq_set_irqchip_state(data, IRQCHIP_STATE_PENDING, true);
}
static void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
{
u32 irqstat, irqnr;
@ -398,6 +403,7 @@ static const struct irq_chip gic_chip = {
.irq_unmask = gic_unmask_irq,
.irq_eoi = gic_eoi_irq,
.irq_set_type = gic_set_type,
.irq_retrigger = gic_retrigger,
.irq_get_irqchip_state = gic_irq_get_irqchip_state,
.irq_set_irqchip_state = gic_irq_set_irqchip_state,
.flags = IRQCHIP_SET_TYPE_MASKED |
@ -996,6 +1002,7 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
struct gic_chip_data *gic = d->host_data;
struct irq_data *irqd = irq_desc_get_irq_data(irq_to_desc(irq));
switch (hw) {
case 0 ... 15:
@ -1013,9 +1020,12 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_domain_set_info(d, irq, hw, &gic->chip, d->host_data,
handle_fasteoi_irq, NULL, NULL);
irq_set_probe(irq);
irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
irqd_set_single_target(irqd);
break;
}
/* Prevents SW retriggers which mess up the ACK/EOI ordering */
irqd_set_handle_enforce_irqctx(irqd);
return 0;
}

15
kernel/irq/resend.c
View File

@ -86,6 +86,18 @@ static int irq_sw_resend(struct irq_desc *desc)
}
#endif
static int try_retrigger(struct irq_desc *desc)
{
if (desc->irq_data.chip->irq_retrigger)
return desc->irq_data.chip->irq_retrigger(&desc->irq_data);
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
return irq_chip_retrigger_hierarchy(&desc->irq_data);
#else
return 0;
#endif
}
/*
* IRQ resend
*
@ -113,8 +125,7 @@ int check_irq_resend(struct irq_desc *desc, bool inject)
desc->istate &= ~IRQS_PENDING;
if (!desc->irq_data.chip->irq_retrigger ||
!desc->irq_data.chip->irq_retrigger(&desc->irq_data))
if (!try_retrigger(desc))
err = irq_sw_resend(desc);
/* If the retrigger was successfull, mark it with the REPLAY bit */