hcall_inject_msi(9)

💅 hcall_inject_msi(9) 💅

okay so bestie, welcome to the hcall_inject_msi(9) page from the Kernel API Manual — we're keeping it cute, and we're keeping every detail. 🫶✨

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🌸 NAME 🌸

hcall_inject_msi — deliver a MSI interrupt to a User VM. That's the vibe: one hypercall, one MSI interrupt, one User VM on the receiving end. 💌

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💖 SYNOPSIS 💖

the signature is giving exactly this, character for character:

long hcall_inject_msi (u64 vmid , u64 msi );

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🎀 ARGUMENTS 🎀

• vmid — User VM ID. This is the ID of the User VM you're aiming at 🎯.
• msi — Service VM GPA of MSI message. That's the literal value you pass, no cap 💅.

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🔥 RETURN 🔥

0 on success, <0 on failure. So yeah: success is 0 ✅, failure is less than 0 😭. That's the whole return situation.

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🦋 SEE ALSO 🦋

Kernel file ./drivers/virt/acrn/hypercall.h, plus the whole hypercall friend group:

• hcall_sos_remove_cpu(9)
• hcall_create_vm(9)
• hcall_start_vm(9)
• hcall_pause_vm(9)
• hcall_destroy_vm(9)
• hcall_reset_vm(9)
• hcall_set_vcpu_regs(9)
• hcall_vm_intr_monitor(9)
• hcall_set_irqline(9)
• hcall_set_ioreq_buffer(9)
• hcall_notify_req_finish(9)
• hcall_set_memory_regions(9)
• hcall_create_vdev(9)
• hcall_destroy_vdev(9)
• hcall_assign_mmiodev(9)
• hcall_deassign_mmiodev(9)
• hcall_assign_pcidev(9)
• hcall_deassign_pcidev(9)
• hcall_set_ptdev_intr(9)
• hcall_reset_ptdev_intr(9)

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okay bye bestie — this page comes from ./drivers/virt/acrn, stamped October 2026, and it's absolutely the hcall_inject_msi(9) page 💅✨