// wdm.h

typedef struct _IO_INTERRUPT_MESSAGE_INFO_ENTRY {
  PHYSICAL_ADDRESS    MessageAddress;
  KAFFINITY           TargetProcessorSet;
  PKINTERRUPT         InterruptObject;
  ULONG               MessageData;
  ULONG               Vector;
  KIRQL               Irql;
  KINTERRUPT_MODE     Mode;
  KINTERRUPT_POLARITY Polarity;
} IO_INTERRUPT_MESSAGE_INFO_ENTRY, *PIO_INTERRUPT_MESSAGE_INFO_ENTRY;
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Windows Driver Kit DDI reference (ns-wdm-_io_interrupt_message_info_entry)

_IO_INTERRUPT_MESSAGE_INFO_ENTRY structure

Description

The IO_INTERRUPT_MESSAGE_INFO_ENTRY structure describes the properties of a single message-signaled interrupt.

Members

`MessageAddress`

Specifies the physical address that triggers the interrupt message.

`TargetProcessorSet`

Specifies a KAFFINITY value that determines the set of processors that can receive the interrupt.

`InterruptObject`

Pointer to the interrupt object that represents the interrupt.

`MessageData`

Specifies the value to be written to the address specified by MessageAddress to trigger the interrupt.

`Vector`

Specifies the interrupt vector for the interrupt.

`Irql`

Specifies the device IRQL (DIRQL) for the interrupt.

`Mode`

Specifies a KINTERRUPT_MODE value that determines whether the interrupt is level-sensitive or latched.

`Polarity`

Specifies a KINTERRUPT_POLARITY value that determines whether the interrupt is active-high or active-low.

IO_INTERRUPT_MESSAGE_INFO_ENTRY - NtDoc