31:14

0h

RO

Reserved

13

0h

RW/L

Event Log Enable (EVNTLOGEN)

0: Hardware writes any software error related events to SWERROR.
1: Any events including software error related ones are written to the event log in memory. (See #341204 section 5.9 for information on the event log.)
This field is reserved when Event Log Support in GENCAP is 0.

12

0h

RW/L

User-mode Interrupts Enable (UMIE)

0: User-mode descriptors are not allowed to request completion interrupts.
1: User-mode descriptors may request completion interrupts. An application is prevented from generating any interrupt that is not assigned to it by matching the PASID field of the interrupt table entry to the PASID of the descriptor. See #341204 section 5.4.

11:8

0h

RO

Reserved

7:0

0h

RO/V

Global Bandwidth Token Limit (GBTL)

This field indicates the maximum number of Read Buffers that may be in use at one time by operations that access low bandwidth memory. This number of Read Buffers is shared by all descriptors accessing low bandwidth memory across the entire device. The default value is equal to the Total Read Buffers reported in GRPCAP.
The value in this field is used when the Use Global Read Buffer Limit field in any of the Group Configuration registers is 1. See #341204 section 9.2.23. If used, this value must be at least 4 times the total number of engines in all groups that have the Use Global Read Buffer Limit set to 1.
If the Global Read Buffer Limit Supported field in GRPCAP is 0, this field is reserved.