AC82G41SLGQ3 Datasheet, PDF (543/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Functional Description
13.6
13.6.1
13.6.2
Intel^® Virtualization Technology for I/O Devices
(Intel^® 82Q45 GMCH Only)
Overview
For the Intel 4 Series Chipsets, the key Intel Virtualization Technology for I/O devices
(device of virtualization) objectives are domain based isolation and virtualization. A
domain can be abstractly defined as an isolated environment in a platform to which a
subset of host physical memory is allocated. Virtualization allows for the creation of one
or more partitions on a single system. This could be multiple partitions in the same OS
or there can be multiple operating system instances running on the same system
offering benefits such as system consolidation, legacy migration, activity partitioning,
or security. Currently, the GMCH supports two partition approaches as shown in the EIT
usage model (see Figure 15).
Embedded IT Client Usage Model
Figure 15. Example of EIT Usage Model
Capability Partition
COS and Apps
Virtual Device
Management Parition
IT/Management Apps
IO Virtualization
Physical Device Driver
Virtual Machine Monitor (VMM)
DMA-Remapping Hardware
IO Device 1 assigned
to host OS
IO Device 2 assigned
to service OS
Figure 15 shows two different host partitions.
• Capability VM runs host OS Management. VM runs IT/management applications.
Virtual partition hidden from the user.
• A VMM is introduced to virtualized BIOS and other system components to the OS.
• DMA remap engine exists in hardware for on-the-fly address translations.
Datasheet
543