AC82G41SLGQ3 Datasheet, PDF (488/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Intel^® Virtualization Technology for Directed I/O Registers (D0:F0) (Intel^® 82Q45 GMCH Only)
12.2.21 FRCD_REG—Fault Recording Registers
B/D/F/Type:
Address Offset:
Default Value:
Access:
Size:
0/0/0/DMIVC1REMAP
200-20Fh
00000000000000000000000000000000h
RO, RO/P, R/WC/P
128 bits
This registers is used to record DMA-remapping 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.
These registers are sticky and can be cleared only through powergood reset or via
software clearing the RW1C fields by writing a 1.
Bit
Access
127
R/WC/P
126
RO/P
125:124
RO
Default
Value
0s
0s
0s
RST/PWR
Description
Core
Core
Core
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 the
PADDR, SID, FR and T fields.
When this field is set, hardware may collapse additional
faults from the same requestor (SID).
Software writes the value read from this field to clear it.
Type (T): Type of the faulted DMA request.
0 = DMA write
1 = DMA read request
This field is relevant only when the F field is set.
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 Reserved.
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.
NOTE: This field is reserved as this feature is not
supported.
123:104
RO
0s
Core
Reserved
Fault Reason (FR): Reason for the fault. Appendix B
103:96
RO/P
0s
Core
enumerates the various translation fault reason encodings.
This field is relevant only when the F field is set.
95:80
RO
0s
Core
Reserved
Source Identifier (SID): Requester-ID of the faulted
79:64
RO/P
0s
Core
DMA request. This field is relevant only when the F field is
set.
Fault Info (FI): This field contains the address (page-
granular) in the faulted DMA request. Hardware may treat
63:12
RO/P
0s
Core
bits 63: N as reserved (0), where N is the maximum guest
address width (MGAW) supported.
This field is relevant only when the F field is set.
11:0
RO
0s
Core
Reserved
488
Datasheet