VID_Mask_Change_Proc

include vpicd.inc

mov     eax, IRQHandle
mov     ebx, VMHandle
mov     ecx, Mask
call    VID_Mask_Change_Proc

Processes attempts to mask or unmask the specified IRQ. The system calls this procedure whenever a virtual machine attempts to mask or unmask an interrupt.

The system disables interrupts before calling this procedure. The procedure can re-enable interrupts if necessary. Uses EAX, EBX, ECX, EDX, ESI, and Flags.

• No return value.

IRQHandle

Handle for the interrupt request.

VMHandle

Handle of the current virtual machine.

Mask

Masked flag. This parameter is nonzero if the IRQ is being masked, and is zero if it is being masked.

A virtual device typically uses this procedure to detect contention for a device. The default interrupt routines use this callback to detect conflicts with nonglobal interrupts.