Module msi 

MSI / MSI-X interrupt support for PCI devices (x86_64).

MSI (Message Signalled Interrupts) bypass the I/O APIC entirely: the device writes a message directly to the LAPIC’s system bus.

Reference

• PCI Local Bus Spec 3.0, §6.8
• Intel 64 and IA-32 SDM, Vol. 3A, §10.11

Functions

enable_msi 🔒

Try to enable MSI on pci_dev with vector.

enable_msix 🔒

Try to enable MSI-X on pci_dev with vector using the first table entry.

probe_and_enable

Probe a PCI device and enable the best available interrupt mode.