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Message-Id: <20211113115429.4027571-4-maz@kernel.org>
Date: Sat, 13 Nov 2021 11:54:24 +0000
From: Marc Zyngier <maz@...nel.org>
To: linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Mark Rutland <mark.rutland@....com>, Will Deacon <will@...nel.org>,
Hector Martin <marcan@...can.st>,
Sven Peter <sven@...npeter.dev>,
Alyssa Rosenzweig <alyssa@...enzweig.io>,
Rob Herring <robh+dt@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 3/8] irqchip/apple-aic: Add cpumasks for E and P cores
In order to be able to tell the core IRQ code about the affinity
of the PMU interrupt in later patches, compute the cpumasks of the
P and E cores at boot time.
This relies on the affinity scheme used by the vendor, which seems
to work for the couple of SoCs that are out in the wild.
Signed-off-by: Marc Zyngier <maz@...nel.org>
---
drivers/irqchip/irq-apple-aic.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 3759dc36cc8f..30ca80ccda8b 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -177,6 +177,8 @@ struct aic_irq_chip {
void __iomem *base;
struct irq_domain *hw_domain;
struct irq_domain *ipi_domain;
+ struct cpumask ecore_mask;
+ struct cpumask pcore_mask;
int nr_hw;
int ipi_hwirq;
};
@@ -200,6 +202,11 @@ static void aic_ic_write(struct aic_irq_chip *ic, u32 reg, u32 val)
writel_relaxed(val, ic->base + reg);
}
+static bool __is_pcore(u64 mpidr)
+{
+ return MPIDR_AFFINITY_LEVEL(mpidr, 2) == 1;
+}
+
/*
* IRQ irqchip
*/
@@ -833,6 +840,13 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p
return -ENODEV;
}
+ for_each_possible_cpu(i) {
+ if (__is_pcore(cpu_logical_map(i)))
+ cpumask_set_cpu(i, &irqc->pcore_mask);
+ else
+ cpumask_set_cpu(i, &irqc->ecore_mask);
+ }
+
set_handle_irq(aic_handle_irq);
set_handle_fiq(aic_handle_fiq);
--
2.30.2
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