AC82G41SLGQ3 Datasheet, PDF (519/604 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
Default
Value
0s
RST/PWR
Description
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. Hardware ignores the invalidation
request and reports invalidation complete by
clearing the IVT field and reporting 000 in the IAIG
field.
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 =
Device-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, and
the device requestor-ID must be provided in SID
field.
101 - 111 =Reserved. Hardware ignores the invalidation
request and reports invalidation complete by
clearing the IVT field and reporting 000 in the IAIG
field.
Depending on the invalidation granularities supported by a
hardware implementation, an invalidation request may be
processed by performing invalidation at a coarser
granularity. 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.
Datasheet
519