15:7

0h

RO

Reserved

6

0b

RO

ACS Direct Translated P2P (T)

ACS Direct Translated P2P is not supported.

5

0b

RO

ACS P2P Egress Control (E)

ACS P2P Egress Control is not supported.

4

1b

RW/O

ACS Upstream Forwarding (U)

ACS Upstream Forwarding.

3

1b

RW/O

ACS P2P Completion Redirect (C)

Required for all Functions that support ACS P2P Request Redirect - must be hardwired to 0b otherwise. If 1b, indicates that the component implements ACS P2P Completion Redirect.

2

1b

RW/O

ACS P2P Request Redirect (R)

Required for Root Ports that support peer-to-peer traffic with other Root Ports - required for Switch Downstream Ports - required for multi-function device Functions that support peer-to-peer traffic with other Functions - must be hardwired to 0b otherwise. If 1b, indicates that the component implements ACS P2P Request Redirect.

1

1b

RW/O

ACS Translation Blocking (B)

Required for Root Ports and
Switch Downstream Ports - must be hardwired to 0b otherwise.
If 1b, indicates that the component implements ACS Translation Blocking.

0

1b

RW/O

ACS Source Validation (V)

Required for Root Ports and Switch Downstream Ports - must be hardwired to 0b otherwise.
If 1b, indicates that the component implements ACS Source Validation.