64-bit SPARC: Extended Message Signaled Interrupt Support for Fire-based Platforms

This system resource enhancement is new in the Solaris Express 5/06 release.

Extended Message Signaled Interrupts (MSI-X) are an enhanced version of MSI interrupts. With MSI-X support, device driver writers have a choice between MSI and MSI-X interrupts. MSI-X interrupts are now supported on SPARC PCI-Experss platforms (Ultra 45 and Sun Fire T2000).

The new mdb/kmdb debugger command, ::interrupts, is also provided to retrieve a device's registered interrupt information on supported SPARC and x86 systems.

For more information, see Chapter 8, Interrupt Handlers, in Writing Device Drivers.