irq_set_msi_desc_off(9)

irq_set_msi_desc_off 💅

okay so bestie, welcome to this Kernel API Manual page. The main character is irq_set_msi_desc_off, and she is here to set MSI descriptor data for an irq at an offset. periodt ✨

🌸 NAME 🌸

irq_set_msi_desc_off — sets the MSI descriptor data for an irq at an offset. That's the name-section moment, and yes she ate. 💖

✨ SYNOPSIS ✨

int irq_set_msi_desc_off (unsigned int irq_base , unsigned int irq_offset , struct msi_desc *entry );

🎀 ARGUMENTS 🎀

• irq_base — the interrupt number base. Think “the base IRQ number,” bestie.
• irq_offset — the interrupt number offset. That's the offset part, no cap.
• entry — pointer to MSI descriptor data. So it's a pointer, and it points at MSI descriptor data. Iconic.

💖 DESCRIPTION 💖

Set the MSI descriptor entry for an irq at offset. That's literally the move: set the MSI descriptor entry for an irq at an offset. Lowkey simple, highkey important. 🦋

🔗 SEE ALSO 🔗

Kernel file ./kernel/irq/chip.c — and the whole friend group is here:

• irq_set_chip(9)
• irq_set_irq_type(9)
• irq_set_handler_data(9)
• irq_set_msi_desc(9)
• irq_set_chip_data(9)
• irq_disable(9)
• handle_nested_irq(9)
• handle_simple_irq(9)
• handle_untracked_irq(9)
• handle_level_irq(9)
• handle_fasteoi_irq(9)
• handle_fasteoi_nmi(9)
• handle_edge_irq(9)
• handle_percpu_irq(9)
• handle_percpu_devid_irq(9)
• irq_cpu_online(9)
• irq_cpu_offline(9)
• handle_fasteoi_ack_irq(9)
• handle_fasteoi_mask_irq(9)
• irq_chip_set_parent_state(9)
• irq_chip_get_parent_state(9)
• irq_chip_shutdown_parent(9)
• irq_chip_startup_parent(9)
• irq_chip_enable_parent(9)
• irq_chip_disable_parent(9)
• irq_chip_ack_parent(9)
• irq_chip_mask_parent(9)
• irq_chip_mask_ack_parent(9)
• irq_chip_unmask_parent(9)
• irq_chip_eoi_parent(9)
• irq_chip_set_affinity_parent(9)
• irq_chip_set_type_parent(9)
• irq_chip_retrigger_hierarchy(9)
• irq_chip_set_vcpu_affinity_parent(9)
• irq_chip_set_wake_parent(9)
• irq_chip_request_resources_parent(9)
• irq_chip_release_resources_parent(9)
• irq_chip_compose_msi_msg(9)
• irq_chip_pm_get(9)
• irq_chip_pm_put(9)

mwah 💋 — this page comes from the ./kernel/irq source/version, dated October 2026, and it's irq_set_msi_desc_off(9). Bye bestie! 🫶