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Message-Id: <20250908163127.2462948-23-maz@kernel.org>
Date: Mon, 8 Sep 2025 17:31:24 +0100
From: Marc Zyngier <maz@...nel.org>
To: linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-acpi@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
Mark Rutland <mark.rutland@....com>,
Will Deacon <will@...nel.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Rob Herring <robh@...nel.org>,
Saravana Kannan <saravanak@...gle.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Sven Peter <sven@...nel.org>,
Janne Grunau <j@...nau.net>,
Suzuki K Poulose <suzuki.poulose@....com>,
James Clark <james.clark@...aro.org>
Subject: [PATCH 22/25] irqchip/apple-aic: Drop support for custom PMU irq partitions
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.
Signed-off-by: Marc Zyngier <maz@...nel.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 dd89e50a72e83..5688411f9f0b8 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);
}
@@ -735,6 +717,10 @@ 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;
--
2.39.2
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