[PATCH v4 22/26] irqchip/apple-aic: Drop support for custom PMU irq partitions

Marc Zyngier
2025-10-20T12:30:16Z

Similarly to what has been done for GICv3, drop the irq partitioning
support from the AIC driver, effectively merging the two per-cpu
interrupts for the PMU.

Reviewed-by: Sven Peter <sven@kernel.org>
Tested-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
drivers/irqchip/irq-apple-aic.c | 28 +++++++---------------------
1 file changed, 7 insertions(+), 21 deletions(-)

diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index cb8b6f40ce8d3..6305d25b9e77b 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -578,16 +578,9 @@ static void __exception_irq_entry aic_handle_fiq(struct pt_regs *regs)
}

if ((read_sysreg_s(SYS_IMP_APL_PMCR0_EL1) & (PMCR0_IMODE | PMCR0_IACT)) ==
- (FIELD_PREP(PMCR0_IMODE, PMCR0_IMODE_FIQ) | PMCR0_IACT)) {
- int irq;
- if (cpumask_test_cpu(smp_processor_id(),
- &aic_irqc->fiq_aff[AIC_CPU_PMU_P]->aff))
- irq = AIC_CPU_PMU_P;
- else
- irq = AIC_CPU_PMU_E;
+ (FIELD_PREP(PMCR0_IMODE, PMCR0_IMODE_FIQ) | PMCR0_IACT))
generic_handle_domain_irq(aic_irqc->hw_domain,
- AIC_FIQ_HWIRQ(irq));
- }
+ AIC_FIQ_HWIRQ(AIC_CPU_PMU_P));

if (static_branch_likely(&use_fast_ipi) &&
(FIELD_GET(UPMCR0_IMODE, read_sysreg_s(SYS_IMP_APL_UPMCR0_EL1)) == UPMCR0_IMODE_FIQ) &&
@@ -632,18 +625,7 @@ static int aic_irq_domain_map(struct irq_domain *id, unsigned int irq,
handle_fasteoi_irq, NULL, NULL);
irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
} else {
- int fiq = FIELD_GET(AIC_EVENT_NUM, hw);
-
- switch (fiq) {
- case AIC_CPU_PMU_P:
- case AIC_CPU_PMU_E:
- irq_set_percpu_devid_partition(irq, &ic->fiq_aff[fiq]->aff);
- break;
- default:
- irq_set_percpu_devid(irq);
- break;
- }
-
+ irq_set_percpu_devid(irq);
irq_domain_set_info(id, irq, hw, &fiq_chip, id->host_data,
handle_percpu_devid_irq, NULL, NULL);
}
@@ -732,6 +714,10 @@ static int aic_irq_domain_translate(struct irq_domain *id,
break;
}
}
+
+ /* Merge the two PMUs on a single interrupt */
+ if (*hwirq == AIC_CPU_PMU_E)
+ *hwirq = AIC_CPU_PMU_P;
break;
default:
return -EINVAL;
--
2.47.3