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test: allow use of nested KVM

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Introduce TEST_NESTED_KVM variable, which allows use of nested KVM for
QEMU VMs (which is disabled by default by KVM autodetection).
This commit is contained in:
Frantisek Sumsal 2019-09-26 23:29:38 +02:00 committed by Filipe Brandenburger
parent c4fed80522
commit 501deda1ce
2 changed files with 19 additions and 5 deletions
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5
test/README.testsuite
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@ -54,6 +54,11 @@ TEST_NO_KVM=1
Disable QEMU KVM autodetection (may be necessary when you're trying to run the
*vanilla* QEMU and have both qemu and qemu-kvm installed)
TEST_NESTED_KVM=1
Allow tests to run with nested KVM. By default, the testsuite disables
nested KVM if the host machine already runs under KVM. Setting this
variable disables such checks
QEMU_MEM=512M
Configure amount of memory for QEMU VMs (defaults to 512M)

19
test/test-functions
View File

@ -17,6 +17,17 @@ UNIFIED_CGROUP_HIERARCHY="${UNIFIED_CGROUP_HIERARCHY:-default}"
EFI_MOUNT="$(bootctl -x 2>/dev/null || echo /boot)"
QEMU_MEM="${QEMU_MEM:-512M}"
# Decide if we can (and want to) run QEMU with KVM acceleration.
# Check if nested KVM is explicitly enabled (TEST_NESTED_KVM). If not,
# check if it's not explicitly disabled (TEST_NO_KVM) and we're not already
# running under KVM. If these conditions are met, enable KVM (and possibly
# nested KVM), otherwise disable it.
if [[ -n "$TEST_NESTED_KVM" || ( -z "$TEST_NO_KVM" && $(systemd-detect-virt -v) != kvm ) ]]; then
QEMU_KVM=yes
else
QEMU_KVM=no
fi
if ! ROOTLIBDIR=$(pkg-config --variable=systemdutildir systemd); then
echo "WARNING! Cannot determine rootlibdir from pkg-config, assuming /usr/lib/systemd" >&2
ROOTLIBDIR=/usr/lib/systemd
@ -86,9 +97,7 @@ fi
function find_qemu_bin() {
# SUSE and Red Hat call the binary qemu-kvm. Debian and Gentoo call it kvm.
# Either way, only use this version if we aren't running in KVM, because
# nested KVM is flaky still.
if [[ $(systemd-detect-virt -v) != kvm && -z $TEST_NO_KVM ]] ; then
if [[ $QEMU_KVM == "yes" ]]; then
[ "$QEMU_BIN" ] || QEMU_BIN=$(which -a kvm qemu-kvm 2>/dev/null | grep '^/' -m1)
fi
@ -220,8 +229,8 @@ $QEMU_OPTIONS \
QEMU_OPTIONS="$QEMU_OPTIONS -initrd $INITRD"
fi
# Let's use KVM if it is available, but let's avoid using nested KVM as that is still flaky
if [[ -c /dev/kvm && $(systemd-detect-virt -v) != kvm && -z $TEST_NO_KVM ]] ; then
# Let's use KVM if possible
if [[ -c /dev/kvm && $QEMU_KVM == "yes" ]]; then
QEMU_OPTIONS="$QEMU_OPTIONS -machine accel=kvm -enable-kvm -cpu host"
fi