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z/VM: CP Commands and Utilities Reference - z/VM - IBM

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DETACH <strong>CP</strong>U<br />

►►<br />

DETach<br />

Authorization<br />

Purpose<br />

Oper<strong>and</strong>s<br />

<strong>CP</strong>U<br />

Usage Notes<br />

Responses<br />

ALL<br />

▼ cpuaddr<br />

cpuaddr1-cpuaddr2<br />

Privilege Class: G<br />

Use DETACH <strong>CP</strong>U to remove processors from your virtual machine configuration.<br />

ALL<br />

specifies all virtual processors currently defined.<br />

cpuaddr<br />

is the processor address of the processor that you want to detach from your<br />

virtual machine configuration.<br />

cpuaddr cpuaddr<br />

is a list of addresses <strong>and</strong>/or ranges delimited by spaces.<br />

cpuaddr1-cpuaddr2<br />

specifies a nonwrapping pair of addresses separated by a hyphen (-) <strong>and</strong> not<br />

separated by any blanks.<br />

1. You can detach any virtual processor from your virtual machine configuration<br />

except the base processor. You cannot detach the base processor from your<br />

virtual machine system.<br />

2. Whenever you detach a virtual processor, your virtual machine is reset as if a<br />

<strong>CP</strong> SYSTEM CLEAR comm<strong>and</strong> had been processed. The effects of this<br />

system-reset-clear function are described in detail in the description for the<br />

SYSTEM CLEAR comm<strong>and</strong>. The system-reset-clear function sets all of your<br />

virtual machine’s storage to binary zeros. Therefore, you must repeat your IPL<br />

procedure to proceed.<br />

3. When a virtual processor is detached, any associated virtual Vector Facility or<br />

Integrated Cryptographic Facility is also detached.<br />

4. SET IMSG OFF suppresses informational messages for this comm<strong>and</strong>.<br />

5. For more information, see “Usage Notes” on page 232.<br />

<strong>CP</strong>U nn DETACHED<br />

indicates that the comm<strong>and</strong> has been successfully processed.<br />

This response is followed by:<br />

DETACH <strong>CP</strong>U<br />

►◄<br />

Chapter 2. <strong>CP</strong> <strong>Comm<strong>and</strong>s</strong> 237

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