15:7

0h

RO

Reserved (RSVD_​M)

Reserved.

6

0h

RO

ACS Direct Translated P2P Enable (TE)

ACS Direct Translated P2P is not supported.

5

0h

RO

ACS P2P Egress Control Enable (EE)

ACS P2P Egress Control is not supported.

4

0h

RW

ACS Upstream Forwarding Enable (UE)

ACS Upstream Forwarding.

3

0h

RW

ACS P2P Completion Redirect Enable (CE)

Determines when the component redirects peer-to-peer Completions upstream - applicable only to Read Completions whose Relaxed Ordering Attribute is clear.

Requests are never affected by ACS P2P Completion Redirect.

Default value of this field is 0b.

Register Attribute: Static.

2

0h

RW

ACS P2P Request Redirect Enable (RE)

Determines when the component redirects peer-to-peer memory Requests targeting another peer port upstream.

I/O, Configuration, VDM Messages and Completions are never affected by ACS P2P Request Redirect.

Default value of this field is 0b.

Register Attribute: Static.

1

0h

RW

ACS Translation Blocking Enable (BE)

When set, the component blocks all upstream Memory Requests whose Address Translation (AT) field is not set to the default value.

I/O, Configuration, Completions and Messages are never affected by ACS Translation Blocking.

Default value of this field is 0b.

Register Attribute: Static.

0

0h

RW

ACS Source Validation Enable (VE)

When set, the component validates the Bus Number from the Requester ID of upstream Requests against the secondary / subordinate Bus Numbers.

I/O, Configuration and Completions are never affected by ACS Source Validation.

Default value of this field is 0b.

Register Attribute: Static.