linux-kernel - [PATCH v2 5/7] irqchip: aslint-sswi: resolve hart index

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Message-ID: <20250610100540.2834044-6-vladimir.kondratiev@mobileye.com>
Date: Tue, 10 Jun 2025 13:05:38 +0300
From: Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>
To: Thomas Gleixner <tglx@...utronix.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>,
	Anup Patel <anup@...infault.org>,
	Chen Wang <unicorn_wang@...look.com>,
	Inochi Amaoto <inochiama@...il.com>,
	Sunil V L <sunilvl@...tanamicro.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Ryo Takakura <takakura@...inux.co.jp>
Cc: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	sophgo@...ts.linux.dev,
	Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>
Subject: [PATCH v2 5/7] irqchip: aslint-sswi: resolve hart index

Resolve hart index according to assignment in the
"riscv,hart-indexes" property as defined in [1]

Link: https://github.com/riscvarchive/riscv-aclint [1]
Signed-off-by: Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>
---
 drivers/irqchip/irq-aclint-sswi.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/irqchip/irq-aclint-sswi.c b/drivers/irqchip/irq-aclint-sswi.c
index ec21785df518..186a021beaef 100644
--- a/drivers/irqchip/irq-aclint-sswi.c
+++ b/drivers/irqchip/irq-aclint-sswi.c
@@ -71,6 +71,7 @@ static int __init aclint_sswi_parse_irq(struct fwnode_handle *fwnode,
 	unsigned long hartid;
 	u32 contexts, i;
 	int rc, cpu;
+	u32 hart_index;
 
 	contexts = of_irq_count(to_of_node(fwnode));
 	if (!(contexts)) {
@@ -92,6 +93,11 @@ static int __init aclint_sswi_parse_irq(struct fwnode_handle *fwnode,
 
 		cpu = riscv_hartid_to_cpuid(hartid);
 
+		rc = riscv_get_hart_index(fwnode, i, &hart_index);
+		if (rc) {
+			pr_warn("%pfwP: hart index [%d] not found\n", fwnode, i);
+			return -EINVAL;
+		}
 		per_cpu(sswi_cpu_regs, cpu) = reg + hart_index * 4;
 	}
 
-- 
2.43.0