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

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