disconnect_bsp_APIC(9)

💅 disconnect_bsp_APIC — the kernel API manual, bestie edition 🎀

okay so like, quick vibe check: this page is disconnect_bsp_APIC from the Kernel API Manual (section 9, the kernel API girlies 💖). it's giving "detach the APIC from the interrupt system" energy, and honestly? iconic.

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✨ NAME ✨

disconnect_bsp_APIC — detach the APIC from the interrupt system 🫶

🌸 SYNOPSIS 🌸

void disconnect_bsp_APIC (int virt_wire_setup );

no cap, that's the whole signature. void return, one int, we move ✨

🦋 ARGUMENTS 🦋

• virt_wire_setup — this one's a little flag-ghostie that indicates, whether virtual wire mode is selected 🎀 like, it literally just tells you if virtual wire mode is the chosen vibe or not.

💜 DESCRIPTION 💜

okay bestie, here's the tea: virtual wire mode is necessary to deliver legacy interrupts even when the APIC is disabled. that's it, that's the whole explanation — the legacy interrupts need that virtual wire mode to actually show up at the party when the APIC is sitting out 🙈✨

🔥 SEE ALSO 🔥

sibling functions, all of them, no skipping, we love a full roster 👑

• Kernel file ./arch/x86/kernel/apic/apic.c
• lapic_get_maxlvt(9)
• clear_local_APIC(9)
• apic_soft_disable(9)
• disable_local_APIC(9)
• sync_Arb_IDs(9)
• setup_local_APIC(9)
• init_apic_mappings(9)
• spurious_interrupt(9)
• connect_bsp_APIC(9)
• apic_bsp_setup(9)

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ngl, if you're poking at APIC teardown you should fr fr read connect_bsp_APIC(9) too — it's the other half of the situationship 😭

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k that's the page!! this lil beauty lives in ./arch/x86/kernel/apic, dated October 2026, and it's filed under disconnect_bsp_APIC(9) in the Kernel API Manual. mwah, stan, periodt 💅💖🌷