setup_local_APIC(9)

💅 setup_local_APIC(9) — Kernel API Manual ✨

okay bestie, so this is a page from the Kernel API Manual, and it's literally the glow-up guide for your local APIC. no cap, it's short but it's iconic. 🎀

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🌸 NAME 🌸

setup_local_APIC — get that local APIC all set up and cute 💖

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⭐ SYNOPSIS ⭐

void setup_local_APIC (void );

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🦋 ARGUMENTS 🦋

• void — no arguments, bestie. none. zero. it takes nothing and it slays anyway 💅

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🌈 DESCRIPTION 🌈

So here's the vibe: this is the function you call to set up the local APIC — both while you're initializing the BSP and while you're bringing up APs. two jobs, one function, main character energy fr fr 👑

🚨 important caveat, do not skip this: it is always called with preemption disabled. like, always. that's the rule. periodt.

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💜 SEE ALSO 💜

Kernel file ./arch/x86/kernel/apic/apic.c — and the whole squad of related functions, because nobody does it alone 🫶

• lapic_get_maxlvt(9)
• clear_local_APIC(9)
• apic_soft_disable(9)
• disable_local_APIC(9)
• sync_Arb_IDs(9)
• init_apic_mappings(9)
• spurious_interrupt(9)
• connect_bsp_APIC(9)
• disconnect_bsp_APIC(9)
• apic_bsp_setup(9)

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anyway that's the whole page, you ate that 💅✨

sign-off time: this little masterpiece lives in ./arch/x86/kernel/apic, dated October 2026, and it's setup_local_APIC(9) through and through. bye bestie, go set up some APICs 🧚💖