MSI_DATA_DELIVERY_MODE_SHIFT   18 arch/x86/include/asm/msidef.h #define  MSI_DATA_DELIVERY_FIXED	(0 << MSI_DATA_DELIVERY_MODE_SHIFT)
MSI_DATA_DELIVERY_MODE_SHIFT   19 arch/x86/include/asm/msidef.h #define  MSI_DATA_DELIVERY_LOWPRI	(1 << MSI_DATA_DELIVERY_MODE_SHIFT)