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a048670bec
Reduce chances of unintended side-effects when evaluating hypervisor data which might have been corrupted. Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com> Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com> Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
71 lines
2.0 KiB
Bash
71 lines
2.0 KiB
Bash
#!/bin/sh
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#
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# Copyright IBM Corp. 2017,2021
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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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# 95zdev/parse-zdev.sh
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# Parse the kernel command line for rd.zdev kernel parameters. These
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# parameters are evaluated and used to configure z Systems specific devices.
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#
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# Format:
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# rd.zdev=no-auto
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#
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# where
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#
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# no-auto: Indicates that firmware-provided I/O configuration data
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# should not be applied. This also affects automatic
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# activation of PCI and crypto devices when running in a DPM
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# LPAR.
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#
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zdev_fw_file="/sys/firmware/sclp_sd/config/data"
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zdev_base_args="--force --yes --no-root-update --no-settle --auto-conf --quiet"
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zdev_id="/lib/s390-tools/zdev_id"
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if [ -e "$zdev_fw_file" ] ; then
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zdev_auto=1
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else
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zdev_auto=0
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fi
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for zdev_arg in $(getargs rd.zdev); do
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if [ "$zdev_arg" = "no-auto" ] ; then
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zdev_auto=0
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fi
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done
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if [ $zdev_auto -eq 1 ] ; then
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# shellcheck disable=SC2086
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chzdev --import "$zdev_fw_file" $zdev_base_args
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# Get information about DPM environment
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tmp="/tmp/zdev_id.env"
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if "$zdev_id" >"$tmp"; then
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while IFS='=' read -r key val; do
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case "$key" in
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ZDEV_*)
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val=${val#\"}
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val=${val%\"}
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export "$key=$val"
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;;
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esac
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done <"$tmp"
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fi
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rm -f "$tmp"
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if [ "$ZDEV_IS_DPM,$ZDEV_NEST_LEVEL,$ZDEV_HYPERVISOR_0" = "1,1,LPAR" ] ; then
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# Manually iterate over existing PCI devices - there is a udev rule
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# that handles this for PCI devices added at runtime but that doesn't
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# work for PCI devices defined before boot because there is no coldplug
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# trigger for /sys/bus/pci/slots
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for slot in /sys/bus/pci/slots/* ; do
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read -r power < "$slot/power"
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if [ "$power" = "0" ] ; then
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echo 1 > "$slot/power"
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fi
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done
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fi
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fi
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