acpi_irq_create_hierarchy(9)

🦋 acpi_irq_create_hierarchy(9) 🦋

okay bestie, so this is a page straight out of the Kernel API Manual (that's the manual name, no cap) and it's literally all about acpi_irq_create_hierarchy — one function, one job, and she does it well 💅

✨ NAME ✨

acpi_irq_create_hierarchy — create a hierarchical IRQ domain that has the default GSI domain as its parent 🫶

✨ SYNOPSIS ✨

struct irq_domain * acpi_irq_create_hierarchy (unsigned int flags ,
       unsigned int size , struct fwnode_handle *fwnode , const struct
       irq_domain_ops *ops , void *host_data );

like, look at her 👑 five arguments, one struct irq_domain * coming back at you. iconic.

🌸 ARGUMENTS 🌸

• flags — the IRQ domain flags that get associated with the domain. flags are her whole personality ngl ✨
• size — the size of the domain. as in, how big she is 💖
• fwnode — the fwnode of the interrupt controller, and it's optional, so no pressure 🎀
• ops — pointer to the interrupt domain callbacks. the little behavior squad 😭
• host_data — controller private data pointer. her personal stash 🙈

like real talk, every one of these gets passed straight in — no guessing, no defaults invented, that's just the signature bestie 💀

🌈 SEE ALSO 🌈

kernel file ./drivers/acpi/irq.c — she lives there, that's her home 🏠

then the whole friend group, fr fr:

• acpi_gsi_to_irq(9)
• acpi_register_gsi(9)
• acpi_unregister_gsi(9)
• acpi_get_irq_source_fwhandle(9)
• acpi_irq_parse_one_match(9)
• acpi_irq_parse_one_cb(9)
• acpi_irq_parse_one(9)
• acpi_irq_get(9)
• acpi_set_irq_model(9)
• acpi_set_gsi_to_irq_fallback(9)

like literally the entire acpi irq squad in one list 🧚💜 go read them, iykyk 🦋

and that's the whole page, periodt 💅 this cutie is filed under ./drivers/acpi, dated October 2026, and her name up top is acpi_irq_create_hierarchy(9) — mwah, go build some hierarchies bestie 💖🎀⭐