Virtualization Technology; Vt) For Directed I/O; Vt-D) Features Supported; Intel Virtualization Technology Processor Extensions - Intel BX80619I73960X Datasheet

Technologies
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3.1.3.1

Intel

Virtualization Technology (Intel
Directed I/O (Intel
The processor supports the following Intel VT-d features:
• Root entry, context entry, and default context
• Support for 4-K page sizes only
• Support for register-based fault recording only (for single entry only) and support
for MSI interrupts for faults
— Support for fault collapsing based on Requester ID
• 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 upon IOTLB invalidation
• Support for page-selective IOTLB invalidation
• Support for ARI (Alternative Requester ID – a PCI SIG ECR for increasing the
function number count in a PCIe device) to support IOV devices
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3.1.3.2 Intel Virtualization Technology (Intel
Directed I/O (Intel
The following are new features supported in Intel VT-d on the processor:
• Improved invalidation architecture
• End point caching support (Address Translation Services)
• Interrupt remapping
• 2M/1G/512G super page support
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3.1.4 Intel
The processor supports the following Intel VT Intel
LGA-2011 socket Extensions features:
• Large Intel VT-d Pages
— Adds 2 MB and 1 GB page sizes to Intel VT-d implementations
— Matches current support for Extended Page Tables (EPT)
— Ability to share CPU's EPT page-table (with super-pages) with Intel VT-d
— Benefits:
• Transition latency reductions expected to improve virtualization performance
without the need for VMM enabling. This reduces the VMM overheads further and
increase virtualization performance.
Datasheet, Volume 1
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VT-d) Features Supported

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VT-d) Processor Feature Additions

Virtualization Technology Processor Extensions
• Less memory foot-print for I/O page-tables when using super-pages
• Potential for improved performance – Due to shorter page-walks, allows
hardware optimization for IOTLB
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VT) for
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VT) for
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Core™ i7 processor family for the
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