15:2

0h

RO

Reserved (RSVD_​M)

Reserved.

1

0h

RO/V

VC Negotiation Pending (NP)

This bit indicates whether the Virtual Channel negotiation (initialization or disabling) is in pending state.



When this bit is Set by hardware, it indicates that the VC resource is still in the process of negotiation. This bit is Cleared by hardware after the VC negotiation is complete. For a nondefault Virtual Channel, software may use this bit when enabling or disabling the VC. For the default VC, this bit indicates the status of the process of Flow Control initialization.



Before using a Virtual Channel, software must check whether the VC Negotiation Pending bits for that Virtual Channel are Clear in both components on a Link.

0

0h

RO

Function Arbitration Table Status (FATS)

This bit indicates the coherency status of the Function Arbitration Table associated

with the VC resource. This bit is valid only when the Function Arbitration Table is used by the selected Function Arbitration for the VC resource.

This bit is Set by hardware when any entry of the Function Arbitration Table is written to by software. This bit is Cleared by hardware when hardware finishes loading values stored in the Function Arbitration Table after software sets the Load FunctionArbitration Table bit.



Default value of this bit is 0b