12th Generation Intel® Core™ Processors Datasheet Volume 2 of 2
ID | Date | Version | Classification |
---|---|---|---|
767625 | 07/13/2023 | Public |
Message Control (MC_0_2_0_PCI) – Offset AE
Message Signaled Interrupt control register. System software can modify bits in this register, but the device is prohibited from doing so. If the device writes the same message multiple times, only one of those messages is guaranteed to be serviced. If all of them must be serviced, the device must not generate the same message again until the driver services the earlier one.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
15:9 | 0x0 | RSV | RESERVED (Reserved_0) The field 'Reserved' in register 'Message Control' does not have a description in the BXML |
8 | 0x1 | RO | Per Vector Mask Capable (PVMASKCAP) SR-IOV requires this capability. |
7 | 0x0 | RO | 64BIT Capable (CAP64B) Hardwired to 0 to indicate that the function does not implement the upper 32 bits of the Message address register and is incapable of generating a 64-bit memory address. |
6:4 | 0x0 | RW/V | Multiple Message Enable (MME) System software programs this field to indicate the actual number of messages allocated to this device. This number will be equal to or less than the number actually requested.Value: Number of requests000: 1001: 2010: 4011: 8100: 16101: 32110: Reserved111: Reserved |
3:1 | 0x0 | RO | Multiple Message Capable (MMC) System Software reads this field to determine the number of messages being requested by this device. Hardwired to 000b to indicate number of requests is 1. |
0 | 0x0 | RW/V | MSI Enable (MSIEN) Controls the ability of this device to generate MSIs. |