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ca50924acb
Add a new udev rule that is triggered when a KVM VM is started on the system the very first time. This rule reports over the sysfs CPI kernel interface that the system is a KVM host. Currently the cpi.service systemd unit already works with the CPI sysfs interface. Introduce a new internal utility script "cpictl" that is used by both the udev rule and the systemd unit to guarantee coordinated access to the kernel CPU interface. Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Reviewed-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com> Reviewed-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
41 lines
1.2 KiB
SYSTEMD
41 lines
1.2 KiB
SYSTEMD
# Service unit to apply control program identification (CPI) settings
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#
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# Copyright IBM Corp. 2017
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#
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# s390-tools is free software; you can redistribute it and/or modify
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# it under the terms of the MIT license. See LICENSE for details.
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#
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[Unit]
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Description=Apply Control Program Identification (CPI)
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DefaultDependencies=no
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Conflicts=shutdown.target
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After=local-fs.target
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ConditionPathIsReadWrite=/sys/firmware/cpi
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[Service]
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Type=oneshot
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#
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# Specify a file with the environment variables using the EnvironmentFile=
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# service property.
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#
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EnvironmentFile=/etc/sysconfig/cpi
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#
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# Alternatively, you can specify the environment variables directly,
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# using the Environment= service properties, which can be overridden by
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# "systemctl edit --full cpi".
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# In this case, the EnvironmentFile= needs to be commented out, otherwise
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# it would override the directly specified variables.
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#
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# The sysplex name, system name, and system type consist of up to eight
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# characters of the following set: A-Z, 0-9, $, @, #, and blank.
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#
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# Environment=CPI_SYSTEM_NAME=
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# Environment=CPI_SYSPLEX_NAME=
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# Environment=CPI_SYSTEM_LEVEL=
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# Environment=CPI_SYSTEM_TYPE=LINUX
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#
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# Sending data to the HMC/SE
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ExecStart=@toolslib_path@/cpictl -e
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