International Business Machines Corporation

Jing Ef Zhang

Jia Zhong Wu

Qing Feng Hao

Dong Jia Shi

Yi Min Ym Zhao

Examples of techniques for cache line cleanup for prevention of side channel attack are described herein. An aspect includes determining, by a rollback control unit, a start of a speculative execution in a computer processor. Another aspect includes setting a field in a speculative buffer of the computer processor based on a load or a store to a cache line of a cache being performed by the speculative execution. Another aspect includes determining a failure of the speculative execution. Another aspect includes, based on the failure of the speculative execution, traversing the speculative buffer to determine the set field and performing a cleanup of the cache line based on the set field in the speculative buffer.

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Beijing, China

Jing Ef Zhang