PROCESSOR ACTIVITY INSTRUMENTATION PROCESSING FOR CRYPTOGRAPHIC INSTRUCTIONS
Dossier Overview
Applicant
INTERNATIONAL BUSINESS MACHINES CORPORATION
Inventor
Louis P. GOMES; Bruce Conrad GIAMEI
IPC Classification
CPC Classification
An instruction to perform cryptographic processing is executed. Executing the instruction includes performing a plurality of operations to generate a cryptographic result. Based on performing at least multiple operations of the plurality of operations, an access exception condition for a storage location used by an instrumentation counter is detected. Based on detecting the access exception condition, execution of the instruction is interrupted. The instruction is re-executed to obtain access to the instrumentation counter. The re-executing the instruction starts from where execution was interrupted and includes updating the instrumentation counter, based on the storage location used for the instrumentation counter being validated.
Original (Chinese)
An instruction to perform cryptographic processing is executed. Executing the instruction includes performing a plurality of operations to generate a cryptographic result. Based on performing at least multiple operations of the plurality of operations, an access exception condition for a storage location used by an instrumentation counter is detected. Based on detecting the access exception condition, execution of the instruction is interrupted. The instruction is re-executed to obtain access to the instrumentation counter. The re-executing the instruction starts from where execution was interrupted and includes updating the instrumentation counter, based on the storage location used for the instrumentation counter being validated.
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