Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
419
Datasheet Volume Two: Functional Description, February 2014
Integrated I/O (IIO) Configuration Registers
61:60
RW
0x0
iirg:
IOTLB Invalidation Request Granularity  
When requesting hardware to invalidate the I/OTLB (by setting the 
Intel
®
VT field), software writes the requested invalidation granularity 
through this IIRG field. Following are the encoding for the 2-bit IIRG field.
00: Reserved. Hardware ignores the invalidation request and reports 
invalidation complete by clearing the Intel
®
VT field and reporting 00 in the 
AIG field.
01: Global Invalidation request.
10: Domain-selective invalidation request. The target domain-id must be 
specified in the DID field. 
11: Page-selective invalidation request. The target address, mask and 
invalidation hint must be specified in the Invalidate Address register, the 
domain-id must be provided in the DID field. 
59:59
RV
-
rsz1:
Reserved.
58:57
RO_V
0x0
iaig:
IOTLB Actual Invalidation Granularity  
Hardware reports the granularity at which an invalidation request was 
proceed through the AIG field at the time of reporting invalidation 
completion (by clearing the Intel
®
VT field).The following are the encoding 
for the 2-bit IAIG field.
00: Reserved. This indicates hardware detected an incorrect invalidation 
request and ignored the request. Examples of incorrect invalidation requests 
include detecting an unsupported address mask value in Invalidate Address 
register for page-selective invalidation requests or an 
unsupported/undefined encoding in IIRG.
01: Global Invalidation performed. The processor sets this in response to a 
global IOTLB invalidation request.
10: Domain-selective invalidation performed using the domain-id that was 
specified by software in the DID field. The processor sets this in response to 
a domain selective IOTLB invalidation request.
11:  CPU sets this in response to a page selective invalidation request.
56:50
RV
-
Reserved.
49:49
RW
0x0
dr:
Drain Reads.
CPU uses this to drain or not drain reads on an invalidation request. 
48:48
RW
0x0
dw:
Drain Writes.
CPU uses this to drain or not drain writes on an invalidation request. 
47:32
RW
0x0
did:
Domain ID.
Domain to be invalidated and is programmed by software for both page and 
domain selective invalidation requests. CPU ignores the bits 47:40 since it 
supports only an 8 bit Domain ID.
31:0
RV
-
Reserved.
Type:
MEM
PortID:
8’h7e
Bus:
0
Device:
5Function:0
Offset:
0x208
, 0x1208
Bit
Attr
Default
Description
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