s390-tools/etc/udev/rules.d/90-cpi.rules at 11f2ccb9570569a57ac0ef0148efcd9b35d7a6b6 - s390-tools - Gitea: Git with a cup of tea

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Claudio Imbrenda ca50924acb cpi: Introduce new udev rule and integrate with systemd unit

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>

2017-09-15 05:03:04 +02:00

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 #
 # Rules to trigger cpictl when KVM is used
 # This file should be installed in /etc/udev/rules.d
 #
 SUBSYSTEM=="misc", KERNEL=="kvm", ENV{CREATED}=="1", ENV{EVENT}=="create", RUN+="/lib/s390-tools/cpictl -b kvm"