[PATCH 3/8] irqchip/apple-aic: Add cpumasks for E and P cores

From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>,
	Will Deacon <will@kernel.org>, Hector Martin <marcan@marcan.st>,
	Sven Peter <sven@svenpeter.dev>,
	Alyssa Rosenzweig <alyssa@rosenzweig.io>,
	Rob Herring <robh+dt@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 3/8] irqchip/apple-aic: Add cpumasks for E and P cores
Date: Sat, 13 Nov 2021 11:54:24 +0000	[thread overview]
Message-ID: <20211113115429.4027571-4-maz@kernel.org> (raw)
In-Reply-To: <20211113115429.4027571-1-maz@kernel.org>

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@kernel.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

