privileged instruction

privileged instruction

[′priv·ə·lijd in′strək·shən]
(computer science)
A class of instructions, usually including storage protection setting, interrupt handling, timer control, input/output, and special processor status-setting instructions, that can be executed only when the computer is in a special privileged mode that is generally available to an operating or executive system, but not to user programs.

privileged instruction

A machine code instruction that may only be executed when the processor is running in supervisor mode. Privileged instructions include operations such as I/O and memory management.
References in periodicals archive ?
KFUPM also supplies students with privileged instruction and training to make them able to contribute to comprehensive development after graduation, the rector said.
Underlying hardware mechanisms, such as the MMU, privileged instruction access control (i.
Because the binary translation of privileged instructions is so cumbersome, hardware-assisted virtualization has been added to modern x86 chips from Intel (Intel VT) and AMD (AMD-V).
These include conditional moves, prefetch instructions, privileged instructions and other enhancements.