[PATCH 6.12] LoongArch: Add machine_kexec_mask_interrupts() implementation

[PATCH 6.12] LoongArch: Add machine_kexec_mask_interrupts() implementation

[Huacai Chen]

Commit 863a320dc6fd7c855f47da4b ("LoongArch: Mask all interrupts during
kexec/kdump") is backported to LTS branches, but they lack a generic
machine_kexec_mask_interrupts() implementation, so add an arch-specific
one.

Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
6.6LTS also need it if commit 863a320dc6fd7c855f47da4b is backported.

 arch/loongarch/kernel/machine_kexec.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/loongarch/kernel/machine_kexec.c b/arch/loongarch/kernel/machine_kexec.c
index 8ef4e4595d61..19bd763263d3 100644
--- a/arch/loongarch/kernel/machine_kexec.c
+++ b/arch/loongarch/kernel/machine_kexec.c
@@ -136,6 +136,28 @@ void kexec_reboot(void)
 	BUG();
 }
 
+static void machine_kexec_mask_interrupts(void)
+{
+	unsigned int i;
+	struct irq_desc *desc;
+
+	for_each_irq_desc(i, desc) {
+		struct irq_chip *chip;
+
+		chip = irq_desc_get_chip(desc);
+		if (!chip)
+			continue;
+
+		if (chip->irq_eoi && irqd_irq_inprogress(&desc->irq_data))
+			chip->irq_eoi(&desc->irq_data);
+
+		if (chip->irq_mask)
+			chip->irq_mask(&desc->irq_data);
+
+		if (chip->irq_disable && !irqd_irq_disabled(&desc->irq_data))
+			chip->irq_disable(&desc->irq_data);
+	}
+}
 
 #ifdef CONFIG_SMP
 static void kexec_shutdown_secondary(void *regs)
-- 
2.47.3

Re: [PATCH 6.12] LoongArch: Add machine_kexec_mask_interrupts() implementation

[kernel test robot]

Hi,

Thanks for your patch.

FYI: kernel test robot notices the stable kernel rule is not satisfied.

The check is based on https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html#option-3

Rule: The upstream commit ID must be specified with a separate line above the commit text.
Subject: [PATCH 6.12] LoongArch: Add machine_kexec_mask_interrupts() implementation
Link: https://lore.kernel.org/stable/20251213094950.1068951-1-chenhuacai%40loongson.cn

Please ignore this mail if the patch is not relevant for upstream.

-- 
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https://github.com/intel/lkp-tests/wiki