AC82G41SLGQ3 Datasheet, PDF (505/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Intel^® Virtualization Technology for Directed I/O Registers (D0:F0) (Intel^® 82Q45 GMCH Only)
Bit
Access
60:59
RO
58:34
RO
33:32
WO
31:16
WO
15:0
R/W
Default
Value
11b
0s
00b
0s
0s
RST/PWR
Description
Core
Core
Core
Core
Core
Context-cache 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. This is the value on reset.
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 DID 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 SIDs specified through the FM and SID
mask fields must correspond to the domain-ID
specified in the DID field.
Value returned on read of this field is undefined.
Source-ID (SID): This field indicates the source-ID of the
device whose corresponding context-entry needs to be
selectively invalidated. This field, along with the FM field,
must be programmed by software for device-selective
invalidation requests.
Value returned on read of this field is undefined.
Domain-ID (DID): This field indicates the ID of the
domain whose context-entries needs to be selectively
invalidated. This field must be programmed by software for
both domain-selective and device-selective invalidation
requests.
The Capability register reports the domain-ID width
supported by hardware. Software must ensure that the
value written to this field is within this limit.
Hardware may ignore and not implement bits15:N where N
is the supported domain-ID width reported in the capability
register.
Datasheet
505