AC82G41SLGQ3 Datasheet, PDF (470/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Intel^® Virtualization Technology for Directed I/O Registers (D0:F0) (Intel^® 82Q45 GMCH Only)
Bit
62:61
60:59
58:34
33:32
Access
R/W
RO
RO
W
Default
Value
RST/PWR
Description
0h
0h
000000000h
0h
Core
Core
Core
Core
Context Invalidation Request Granularity (CIRG):
Software provides the requested invalidation granularity
through this field when setting the ICC field.
00 =Reserved.
01 =Global Invalidation request.
10 =Domain-selective invalidation request. The target
domain-ID must be specified in the DID field.
11 =Device-selective invalidation request. The target
source-ID(s) must be specified through the SID and
FM fields, and the domain-ID (that was programmed
in the context-entry for these device(s)) must be
provided in the DID field.
Hardware implementations may process an invalidation
request by performing invalidation at a coarser granularity
than requested. Hardware indicates completion of the
invalidation request by clearing the ICC field. At this time,
hardware also indicates the granularity at which the actual
invalidation was performed through the CAIG field.
Context Actual Invalidation Granularity (CAIG):
Hardware reports the granularity at which an invalidation
request was processed through the CAIG field at the time
of reporting invalidation completion (by clearing the ICC
field).
00 = Reserved.
01 = Global Invalidation performed. This could be in
response to a global, domain-selective or device-
selective invalidation request.
10 = Domain-selective invalidation performed using the
domain-ID specified by software in the DID field.
This could be in response to a domain-selective or
device-selective invalidation request.
11 = Device-selective invalidation performed using the
source-ID and domain-ID specified by software in
the SID and FM fields. This can only be in response
to a device-selective invalidation request.
Reserved
Function Mask (FM): This field specifies which bits of the
function number portion (least significant three bits) of the
SID field to mask when performing device-selective
invalidations.
00 = No bits in the SID field masked.
01 = Mask most significant bit of function number in the
SID field.
10 = Mask two most significant bit of function number in
the SID field.
11 = Mask all three bits of function number in the SID
field.
The device(s) specified through the FM and SID fields
must correspond to the domain-ID specified in the DID
field.
Value returned on read of this field is undefined.
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Datasheet