DEFINE_IDTE...YSVEC_SIMPLE(9)

💅 DEFINE_IDTE...YSVEC_SIMPLE(9) 💅

okay so we're deep in the Kernel API Manual bestie, and this one is literally the tiny little macro that makes your simple system vector IDT entries exist ✨ it's from ./arch/x86/include/asm and honestly? it's giving "small but mighty" 🎀

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🌸 NAME 🌸

DEFINE_IDTENTRY_SYSVEC_SIMPLE — the macro that emits code for simple system vector IDT entry points 🦋 no cap, that's the whole vibe.

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✨ SYNOPSIS ✨

DEFINE_IDTENTRY_SYSVEC_SIMPLE (func );

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🎀 ARGUMENTS 🎀

• func — the function name of the entry point 💖 like, that's the name you're handing over, that's the whole assignment bestie.

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🔥 DESCRIPTION 🔥

So here's the tea: this thing runs the function on the interrupted stack. No switch to the IRQ stack, and only the absolute minimal __irq_enter/exit handling — lowkey efficient, highkey iconic 💅

🚨 important warning bestie, do NOT skip this: only use it for 'empty' vectors like the reschedule IPI and the KVM posted interrupt vectors. That's it. That's the guest list. 🙈

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🦋 SEE ALSO 🦋

Kernel file ./arch/x86/include/asm/idtentry.h — go read it, iykyk 📖

• DECLARE_IDTENTRY(9)
• DEFINE_IDTENTRY(9)
• DECLARE_IDTENTRY_ERRORCODE(9)
• DEFINE_IDTENTRY_ERRORCODE(9)
• DECLARE_IDTENTRY_RAW(9)
• DEFINE_IDTENTRY_RAW(9)
• DEFINE_FREDENTRY_RAW(9)
• DECLARE_IDTENTRY_RAW_ERRORCODE(9)
• DEFINE_IDTENTRY_RAW_ERRORCODE(9)
• DECLARE_IDTENTRY_IRQ(9)
• DEFINE_IDTENTRY_IRQ(9)
• DECLARE_IDTENTRY_SYSVEC(9)
• DEFINE_IDTENTRY_SYSVEC(9)
• DECLARE_IDTENTRY_XENCB(9)
• DECLARE_IDTENTRY_IST(9)
• DECLARE_IDTENTRY_VC(9)
• DEFINE_IDTENTRY_IST(9)
• DEFINE_IDTENTRY_NOIST(9)
• DECLARE_IDTENTRY_DF(9)
• DEFINE_IDTENTRY_DF(9)
• DECLARE_IDTENTRY_DF(9)
• DEFINE_IDTENTRY_DF(9)

(yeah the last two show up twice, that's just how the og page rolls, we don't gatekeep 💀)

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and that's the whole page, bestie 🫶 this little icon lives in ./arch/x86/include/asm and it's dated October 2026 — so like, future vibes, main character energy, slay 💜 go forth and define your simple system vector IDT entry points responsibly 🌈⭐