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#!/bin/sh
# Detect our host arch
arch=$(arch)
test -z "$arch" && exit 0
modlist=""
case "$arch" in
x86_64 | i686)
kvm=/usr/bin/qemu-system-x86_64
if grep -qs "^flags.* vmx" /proc/cpuinfo; then
modlist="kvm_intel $KVM_NESTED"
elif grep -qs "^flags.* svm" /proc/cpuinfo; then
modlist="kvm_amd"
fi
;;
ppc*)
SMT=$(/usr/sbin/ppc64_cpu --smt 2>&1 | grep "SMT=[248]")
if [ -n "$SMT" ]
then
if grep -q -e '^cpu\s*:\s*POWER8' /proc/cpuinfo; then
echo "Error: You must disable SMT if you want to run QEMU/KVM on Power8 based ppc64le architecture"
echo "In order to disable SMT, run: # ppc64_cpu --smt=off"
fi
fi
kvm=/usr/bin/qemu-system-ppc64
if [ "$(uname -m)" != "ppc64le" ]; then
exit 0
fi
if systemd-detect-virt --quiet --vm; then
echo "Info: second level virtualization not supported, kvm-hv load might fail"
fi
modlist="kvm-hv"
;;
esac
# Silently exit if the package isn't installed anymore
if [ -z "$kvm" -o ! -e "$kvm" ]; then
exit 0
fi
# shellcheck disable=SC1091
[ -r /etc/default/qemu-kvm ] && . /etc/default/qemu-kvm
start() {
if [ -n "$modlist" ]; then
modprobe -b $modlist || true
fi
if systemd-detect-virt --quiet --container; then
mknod /dev/kvm c 10 232 || true
chown root:kvm /dev/kvm || true
chmod g+rw /dev/kvm || true
fi
# Determine if we are running inside a VM
IS_VM=0
if command -v systemd-detect-virt >/dev/null 2>&1; then
systemd-detect-virt -vq && IS_VM=1
fi
# Enable KSM, respecting the default configuration file. If 'AUTO' is
# set, enable only if we aren't running inside a VM.
if [ "$KSM_ENABLED" = "1" ] || [ "$KSM_ENABLED" = "AUTO" ] && [ "$IS_VM" = "0" ]; then
# shellcheck disable=SC2015
[ -w /sys/kernel/mm/ksm/run ] && echo 1 > /sys/kernel/mm/ksm/run || true
if [ -w /sys/kernel/mm/ksm/sleep_millisecs ]; then
if [ -n "$SLEEP_MILLISECS" ]; then
echo "$SLEEP_MILLISECS" > /sys/kernel/mm/ksm/sleep_millisecs || true
fi
fi
else
# shellcheck disable=SC2015
[ -w /sys/kernel/mm/ksm/run ] && echo 0 > /sys/kernel/mm/ksm/run || true
fi
}
# See how we were called.
case "$1" in
start)
start
;;
*)
exit 0
;;
esac
exit $?
|
