Flexible Return and Event Delivery (FRED) Draft Specification

Last updated: June 23, 2021
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Detailed Description

This is the specification of a new feature for the Intel® 64 instruction set called flexible return and event delivery (FRED).  The feature defines new control-flow transitions (generally between privilege levels) that replace existing transitions (such as event delivery through the IDT and return using IRET). This document is a work in progress and is subject to change based on customer feedback and internal analysis.

Product and Performance Information


Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.