pci_msi_enabled(9)

🌸 NAME 🌸

okay so bestie 💖, this is pci_msi_enabled(9) from the Kernel API Manual, and the name is literally asking: Are MSI(-X) interrupts enabled system-wide? It's giving tiny-but-important vibe check, no cap ✨.

✨ SYNOPSIS ✨

bool pci_msi_enabled (void );

🎀 ARGUMENTS 🎀

void — no arguments. Like, none. Zero. It takes nothing, periodt 💅.

🦋 RETURN 🦋

It returns true if MSI has not been globally disabled through ACPI FADT, PCI bridge quirks, or the pci=nomsi kernel command-line option. That's the whole check, bestie — a system-wide yes/no moment 🌈.

💜 SEE ALSO 💜

Kernel file: ./drivers/pci/msi/api.c — and the whole MSI crew is linked here, so go be nosy 👀:

• pci_enable_msi(9)
• pci_disable_msi(9)
• pci_msix_vec_count(9)
• pci_enable_msix_range(9)
• pci_msix_can_alloc_dyn(9)
• pci_msix_alloc_irq_at(9)
• pci_msix_free_irq(9)
• pci_disable_msix(9)
• pci_alloc_irq_vectors(9)
• pci_alloc_irq_vectors_affinity(9)
• pci_irq_vector(9)
• pci_irq_get_affinity(9)
• pci_free_irq_vectors(9)
• pci_restore_msi_state(9)

mwah 💋 source/version: ./drivers/pci/msi · date: October 2026 · page: pci_msi_enabled(9) — bye bestie 🫶