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kexec: Consolidate machine_kexec_mask_interrupts() implementation

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Consolidate the machine_kexec_mask_interrupts implementation into a common
function located in a new file: kernel/irq/kexec.c. This removes duplicate
implementations from architecture-specific files in arch/arm, arch/arm64,
arch/powerpc, and arch/riscv, reducing code duplication and improving
maintainability.

The new implementation retains architecture-specific behavior for
CONFIG_GENERIC_IRQ_KEXEC_CLEAR_VM_FORWARD, which was previously implemented
for ARM64. When enabled (currently for ARM64), it clears the active state
of interrupts forwarded to virtual machines (VMs) before handling other
interrupt masking operations.

Signed-off-by: Eliav Farber <farbere@amazon.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241204142003.32859-2-farbere@amazon.com
Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>
This commit is contained in:
Eliav Farber
2025-11-24 15:14:39 +08:00
committed by maoxiaochuan
parent d356138b31
commit ba49f29324
11 changed files with 52 additions and 101 deletions
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include/linux/irq.h
+3
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@@ -694,6 +694,9 @@ extern int irq_chip_request_resources_parent(struct irq_data *data);
extern void irq_chip_release_resources_parent(struct irq_data *data);
#endif
/* Disable or mask interrupts during a kernel kexec */
extern void machine_kexec_mask_interrupts(void);
/* Handling of unhandled and spurious interrupts: */
extern void note_interrupt(struct irq_desc *desc, irqreturn_t action_ret);