Determines whether the platform supports MSI delivery.

BOOLEAN PciMsiNotAvailable(void);

Parameters

None.

Return Values

TRUE if MSI is not available on the platform, else FALSE

Remarks

In order to support MSI (Message Signaled Interrupts) a platform must have a chipset which is capable of supporting them. Certain early chipsets advertised support for MSI but were buggy. This call returns FALSE if the platform is capable of receiving MSIs and the chipset is not on the blacklist of buggy chipsets.

Requirements