linux-kernel - [PATCH v2 06/11] genirq: Introduce common irq_force_complete

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Message-ID: <20241214172549.8842-7-apatel@ventanamicro.com>
Date: Sat, 14 Dec 2024 22:55:44 +0530
From: Anup Patel <apatel@...tanamicro.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Marc Zyngier <maz@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Andrew Lunn <andrew@...n.ch>,
	Gregory Clement <gregory.clement@...tlin.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Atish Patra <atishp@...shpatra.org>,
	Andrew Jones <ajones@...tanamicro.com>,
	Sunil V L <sunilvl@...tanamicro.com>,
	Anup Patel <anup@...infault.org>,
	linux-riscv@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev,
	Anup Patel <apatel@...tanamicro.com>
Subject: [PATCH v2 06/11] genirq: Introduce common irq_force_complete_move() implementation

The GENERIC_PENDING_IRQ requires an arch specific implementation
of irq_force_complete_move(). At the moment, only x86 implements
this but for RISC-V the irq_force_complete_move() is only needed
when RISC-V IMSIC driver is in use and not needed otherwise.

To address the above, introduce common weak implementation of
the irq_force_complete_move() which lets irqchip do the actual
irq_force_complete_move().

Signed-off-by: Anup Patel <apatel@...tanamicro.com>
---
 include/linux/irq.h    | 5 +++++
 kernel/irq/migration.c | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index b689c8fe8d60..509c0ee4ef38 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -496,6 +496,7 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
  * @ipi_send_mask:	send an IPI to destination cpus in cpumask
  * @irq_nmi_setup:	function called from core code before enabling an NMI
  * @irq_nmi_teardown:	function called from core code after disabling an NMI
+ * @irq_force_complete_move:	optional function to force complete pending irq move
  * @flags:		chip specific flags
  */
 struct irq_chip {
@@ -547,6 +548,10 @@ struct irq_chip {
 	int		(*irq_nmi_setup)(struct irq_data *data);
 	void		(*irq_nmi_teardown)(struct irq_data *data);
 
+#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
+	void		(*irq_force_complete_move)(struct irq_data *data);
+#endif
+
 	unsigned long	flags;
 };
 
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index eb150afd671f..2920024475a3 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -5,6 +5,15 @@
 
 #include "internals.h"
 
+void __weak irq_force_complete_move(struct irq_desc *desc)
+{
+	struct irq_data *d = irq_desc_get_irq_data(desc);
+	struct irq_chip *chip = irq_data_get_irq_chip(d);
+
+	if (chip && chip->irq_force_complete_move)
+		chip->irq_force_complete_move(d);
+}
+
 /**
  * irq_fixup_move_pending - Cleanup irq move pending from a dying CPU
  * @desc:		Interrupt descriptor to clean up
-- 
2.43.0