AC82G41SLGQ3 Datasheet, PDF (486/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Intel^® Virtualization Technology for Directed I/O Registers (D0:F0) (Intel^® 82Q45 GMCH Only)
Bit
Access
62:60
R/W
59:57
RO
56:50
RO
Default
Value
0s
0s
00h
RST/PWR
Description
Core
Core
Core
IOTLB Invalidation Request Granularity (IIRG):
When requesting hardware to invalidate the IOTLB (by
setting the IVT field), software writes the requested
invalidation granularity through this IIRG field.
000 = Reserved.
001 = Global invalidation request.
010 = Domain-selective invalidation request. The target
domain-ID must be specified in the DID field.
011 = Domain-page-selective invalidation request. The
target address, mask and invalidation hint must be
specified in the Invalidate Address register, and the
domain-ID must be provided in the DID field.
100–111 =Reserved.
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 IVT field. At this time,
the granularity at which actual invalidation was performed
is reported through the IAIG field.
IOTLB Actual Invalidation Granularity (IAIG):
Hardware reports the granularity at which an invalidation
request was processed through this field at the time of
reporting invalidation completion (by clearing the IVT
field).
000 =
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.
001 =
Global Invalidation performed. This could be in
response to a global, domain-selective, domain-
page-selective, or device-page-selective
invalidation request.
010 =
Domain-selective invalidation performed using the
domain-ID specified by software in the DID field.
This could be in response to a domain-selective,
domain-page-selective, or device-page-selective
invalidation request.
011 =
Domain-page-selective invalidation performed
using the address, mask and hint specified by
software in the Invalidate Address register and
domain-ID specified in DID field. This can be in
response to a domain-page-selective or device-
page-selective invalidation request.
100 – 111 =Reserved.
Reserved
486
Datasheet