Intel® Core™ Ultra Processors for H-series and U-series Platforms SOC I/O Registers
ACS Capability Register (ACSCAPR) – Offset 224
This is the ACS Capability Register registers. Refer description for each individual field below for more details of the register functionality.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
15:7 | 0h | RO | Reserved (RSVD_M) Reserved. |
6 | 0h | RO | ACS Direct Translated P2P (T) ACS Direct Translated P2P is not supported. |
5 | 0h | RO | ACS P2P Egress Control (E) ACS P2P Egress Control is not supported. |
4 | 1h | RW/O | ACS Upstream Forwarding (U) ACS Upstream Forwarding. |
3 | 1h | 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 | 1h | 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 | 1h | RW/O | ACS Translation Blocking (B) Required for Root Ports and |
0 | 1h | RW/O | ACS Source Validation (V) Required for Root Ports and Switch Downstream Ports - must be hardwired to 0b otherwise. |