Intel BX80623I32100 User Manual

Datasheet, Volume 1 37
Technologies
3.1.4 Intel
®
Virtualization Technology (Intel
®
VT) for Directed
I/O (Intel
®
VT-d) Features
The processor supports the following Intel VT-d features:
• Memory controller and Processor Graphics comply with Intel
®
VT-d 1.2
specification.
•Two VT-d DMA remap engines.
— iGraphics DMA remap engine
—DMI/PEG
• Support for root entry, context entry, and default context
• 39-bit guest physical address and host physical address widths
• Support for 4K page sizes only
• Support for register-based fault recording only (for single entry only) and support
for MSI interrupts for faults
• Support for both leaf and non-leaf caching
• Support for boot protection of default page table
• Support for non-caching of invalid page table entries
• Support for hardware based flushing of translated but pending writes and pending
reads, on IOTLB invalidation
• Support for page-selective IOTLB invalidation
• MSI cycles (MemWr to address FEEx_xxxxh) not translated
— Translation faults result in cycle forwarding to VBIOS region (byte enables
masked for writes). Returned data may be bogus for internal agents, PEG/DMI
interfaces return unsupported request status
• Interrupt Remapping is supported
• Queued invalidation is supported.
• VT-d translation bypass address range is supported (Pass Through)
Note: Intel VT-d Technology may not be available on all SKUs.
3.1.5 Intel
®
Virtualization Technology (Intel
®
VT) for Directed
I/O (Intel
®
VT-d) Features Not Supported
The following features are not supported by the processor with Intel VT-d:
• No support for PCISIG endpoint caching (ATS)
• No support for Intel VT-d read prefetching/snarfing (that is, translations within a
cacheline are not stored in an internal buffer for reuse for subsequent translations).
• No support for advance fault reporting
• No support for super pages
• No support for Intel VT-d translation bypass address range (such usage models
need to be resolved with VMM help in setting up the page tables correctly)

Intel BX80623I32100 Specifications

General

Brand	Intel
Model	BX80623I32100
Category	Computer Hardware
Language	English