Intel BB5520UR Product Specification - Page 95

Intel® Server Boards S5520HC, S5500HCV, and S5520HCT TPS BIOS Setup Utility Setup Item Intel® Virtualization Technology for Directed I/O Options Enabled Disabled Interrupt Remapping Enabled Disabled Coherency Support Enabled Disabled ATS Support Enabled Disabled Pass-through Support DMA Enabled Disabled Hardware Prefetcher Enabled Disabled Adjacent Cache Line Prefetch Enabled Disabled Direct Cache Access (DCA) Enabled Disabled Help Text Enable/Disable Intel® Virtualization Technology for Directed I/O. Report the I/O device assignment to VMM through DMAR ACPI Tables Enable/Disable Intel® VT-d Interrupt Remapping support. Enable/Disable Intel® VT-d Coherency support. Enable/Disable Intel® VT-d Address Translation Services (ATS) support. Enable/Disable Intel® VT-d Pass-through DMA support. Hardware Prefetcher is a speculative prefetch unit within the processor(s). Note: Modifying this setting may affect system performance. [Enabled] - Cache lines are fetched in pairs (even line + odd line). [Disabled] - Only the current cache line required is fetched. Note: Modifying this setting may affect system performance. Allows processors to increase the I/O performance by placing data from I/O devices directly into the processor cache. Comments Only appears when Intel® Virtualization Technology for Directed I/O is enabled. Only appears when Intel® Virtualization Technology for Directed I/O is enabled. Only appears when Intel® Virtualization Technology for Directed I/O is enabled. Only appears when Intel® Virtualization Technology for Directed I/O is enabled. Revision 1.8 81 Intel order number E39529-013