hcall_set_irqline(9)

📦 version 7.3.1, in nixpkgs unstable

💅 hcall_set_irqline(9) — Kernel API Manual 💅

okay bestie, welcome to the Kernel API Manual, and specifically to hcall_set_irqline, the little hypercall that's out here doing the absolute most for interrupt lines 💖 This one's part of the ACRN hypercall crew, so if you're already deep in ./drivers/virt/acrn territory, you're exactly where you need to be. Let's get into it ✨

🎀 NAME 🎀

hcall_set_irqline — set or clear an interrupt line. that's it, that's the job. it sets, it clears, it slays 💅

🦋 SYNOPSIS 🦋

long hcall_set_irqline (u64 vmid , u64 op );

look at that signature, so clean, so iconic ✨ two u64 args, one long coming back at you. no cap, it's giving "small but mighty" 🫶

🌸 ARGUMENTS 🌸

  • vmid — the User VM ID 💜 like, which VM are we talking about here. bestie needs a name tag.
  • op — the Service VM GPA of the interrupt line operations 🔥 that's a guest physical address where the interrupt-line operation stuff lives. highkey important, don't fumble it 🙈

🧚 RETURN 🧚

  • 0 on success 🌈 (periodt, we love a clean zero)
  • <0 on failure 😭 (bestie it did NOT work out, check that negative return)

👑 SEE ALSO 👑

okay so if you're obsessed with this one (and honestly why wouldn't you be), there's a whole friend group living in the kernel file ./drivers/virt/acrn/hypercall.h — go say hi to the whole squad 💖

like, that's the whole group chat right there 💀🫶 go read them too, iykyk

✨ and that's the page, bestie ✨ this icon came from ./drivers/virt/acrn, dropped in October 2026, and yes, it's filed under hcall_set_irqline(9) for all your future reference needs 🎀💜 ngl, you ate that read-through. mwah 💋

📦 where this page comes from