Selectively controlling instruction execution in transactional processing
First Claim
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1. A method of controlling execution of instructions within transactions of a computing environment, said method comprising:
- obtaining, by a processor, a machine instruction for execution, the machine instruction being defined for computer execution according to a computer architecture, the machine instruction comprising;
an operation code to specify a transaction begin operation; and
at least one control to be used in controlling execution of one or more types of instructions in transactional processing;
executing, by the processor, the machine instruction, the executing comprising;
initiating a transaction; and
using a first control of the at least one control of the machine instruction to determine a first value, the first value to control execution within the transaction of an instruction of a first type, wherein the first control is an allow access register modification control, and wherein based on the first control being the allow access register modification control, the first type comprises instructions that modify one or more access registers, the allow access register modification control to be used to indicate whether the transaction is permitted to execute an instruction that modifies an access register that includes an indirect specification of an address space control element to be used in address translation; and
controlling execution of a particular instruction of the transactional processing based on the first value, the first value determined using the allow access register modification control.
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Abstract
Execution of instructions in a transactional environment is selectively controlled. A TRANSACTION BEGIN instruction initiates a transaction and includes controls that selectively indicate whether certain types of instructions are permitted to execute within the transaction. The controls include one or more of an allow access register modification control and an allow floating point operation control.
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Citations
20 Claims
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1. A method of controlling execution of instructions within transactions of a computing environment, said method comprising:
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obtaining, by a processor, a machine instruction for execution, the machine instruction being defined for computer execution according to a computer architecture, the machine instruction comprising; an operation code to specify a transaction begin operation; and at least one control to be used in controlling execution of one or more types of instructions in transactional processing; executing, by the processor, the machine instruction, the executing comprising; initiating a transaction; and using a first control of the at least one control of the machine instruction to determine a first value, the first value to control execution within the transaction of an instruction of a first type, wherein the first control is an allow access register modification control, and wherein based on the first control being the allow access register modification control, the first type comprises instructions that modify one or more access registers, the allow access register modification control to be used to indicate whether the transaction is permitted to execute an instruction that modifies an access register that includes an indirect specification of an address space control element to be used in address translation; and controlling execution of a particular instruction of the transactional processing based on the first value, the first value determined using the allow access register modification control. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A computer program product for controlling execution of instructions within transactions of a computing environment, said computer program product comprising:
a non-transitory computer readable storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising; obtaining, by a processor, a machine instruction for execution, the machine instruction being defined for computer execution according to a computer architecture, the machine instruction comprising; an operation code to specify a transaction begin operation; and at least one control to be used in controlling execution of one or more types of instructions in transactional processing; executing, by the processor, the machine instruction, the executing comprising; initiating a transaction; and using a first control of the at least one control of the machine instruction to determine a first value, the first value to control execution within the transaction of an instruction of a first type, wherein the first control is an allow access register modification control, and wherein based on the first control being the allow access register modification control, the first type comprises instructions that modify one or more access registers, the allow access register modification control to be used to indicate whether the transaction is permitted to execute an instruction that modifies an access register that includes an indirect specification of an address space control element to be used in address translation; and controlling execution of a particular instruction of the transactional processing based on the first value, the first value determined using the allow access register modification control. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A computer system for controlling execution of instructions within transactions of a computing environment, said computer system comprising:
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a memory; and a processor in communications with the memory, wherein the computer system is configured to perform a method, said method comprising; obtaining, by the processor, a machine instruction for execution, the machine instruction being defined for computer execution according to a computer architecture, the machine instruction comprising; an operation code to specify a transaction begin operation; and at least one control to be used in controlling execution of one or more types of instructions in transactional processing; executing, by the processor, the machine instruction, the executing comprising; initiating a transaction; and using a first control of the at least one control of the machine instruction to determine a first value, the first value to control execution within the transaction of an instruction of a first type, wherein the first control is an allow access register modification control, and wherein based on the first control being the allow access register modification control, the first type comprises instructions that modify one or more access registers, the allow access register modification control to be used to indicate whether the transaction is permitted to execute an instruction that modifies an access register that includes an indirect specification of an address space control element to be used in address translation; and controlling execution of a particular instruction of the transactional processing based on the first value, the first value determined using the allow access register modification control. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification