idt_setup_early_pf(9)

🌸 idt_setup_early_pf — Kernel API Manual 🌸

okay so bestie, welcome to the Kernel API Manual entry for idt_setup_early_pf(9). this one is short but it's lowkey doing main character work in the early boot arc 💅

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✨ NAME ✨

idt_setup_early_pf — initialize the idt table with early pagefault handler 🎀

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🦋 SYNOPSIS 🦋

void idt_setup_early_pf (void );

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🍓 ARGUMENTS 🍓

• void — no arguments, bestie. literally none. not a single one. 🙈

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💜 DESCRIPTION 💜

okay so on X8664, this does not use interrupt stacks, because they can't work before cpu_init is invoked and sets up TSS. the IST variant is installed after that. periodt. ✨

not me stressing the ordering — but yeah, the sequencing is the whole vibe here. 💀

also note: X86_64 cannot install the real #PF handler in idt_setup_early_traps, because the memory initialization needs the #PF handler from the early_idt_handler_array to initialize the early page tables. like, it literally needs it. no cap. 🔥

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🌈 SEE ALSO 🌈

• Kernel file ./arch/x86/kernel/idt.c
• idt_setup_early_traps(9)
• idt_setup_traps(9)
• idt_setup_apic_and_irq_gates(9)
• idt_setup_early_handler(9)
• idt_invalidate(9)

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💖 signed, sealed, delivered from ./arch/x86/kernel • October 2026 • idt_setup_early_pf(9) 💖