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294

Datasheet, Volume 2

This register records fault information when primary fault logging is active. Hardware 
reports the number and location of fault recording registers through the Capability 
register. This register is relevant only for primary fault logging.

This register is sticky and can be cleared only through power good reset or by software 
clearing the RW1C fields by writing a 1.

63

RW1CS

0b

Powergood

Fault (F) 
Hardware sets this field to indicate a fault is logged in this 

Fault Recording register. The F field is set by hardware after 

the details of the fault is recorded in other fields.
When this field is set, hardware may collapse additional faults 

from the same source-id (SID).
Software writes the value read from this field to clear it. 

62

ROS-V

0b

Powergood

Type (T) 
Type of the faulted request:
0 = Write request
1 = Read request or AtomicOp request
This field is relevant only when the F field is set, and when the 

fault reason (FR) indicates one of the DMA-remapping fault 

conditions.

61:60

RO

00b

Uncore

Address Type (AT) 
This field captures the AT field from the faulted DMA request. 
Hardware implementations not supporting Device-IOTLBs (DI 

field Clear in Extended Capability register) treat this field as 

RsvdZ.
When supported, this field is valid only when the F field is set, 

and when the fault reason (FR) indicates one of the DMA-

remapping fault conditions.

59:40

RO

0h

39:32

ROS-V

00h

Powergood

Fault Reason (FR) 
This field provides the reason for the fault. This field is 

relevant only when the F field is set.

31:16

RO

0h

15:0

ROS-V

000000000

0000000b

Powergood

Source Identifier (SID) 
This field provides the Requester-id associated with the fault 

condition. This field is relevant only when the F field is set.