# The following resources were useful in writing this script:
# . http://www.dmo.ca/blog/20080530151107
+# Do not allow unset variables, and set defaults.
+set -u
+root=''
+skip_qemu_kvm=false
+
VERSION="@VERSION@"
function fail {
- echo "virt-what: $1"
+ echo "virt-what: $1" >&2
exit 1
}
# Handle the command line arguments, if any.
-TEMP=`getopt -o v --long help --long version --long test-root: -n 'virt-what' -- "$@"`
+TEMP=$(getopt -o v --long help --long version --long test-root: -n 'virt-what' -- "$@")
if [ $? != 0 ]; then exit 1; fi
eval set -- "$TEMP"
# Check we're running as root.
-uid=`id -u`
-if [ "$uid" != 0 ]; then
+if [ "x$root" = "x" ] && [ "$EUID" -ne 0 ]; then
fail "this script must be run as root"
fi
# Many fullvirt hypervisors give an indication through CPUID. Use the
# helper program to get this information.
-cpuid=`virt-what-cpuid-helper`
+cpuid=$(virt-what-cpuid-helper)
# Check for various products in the BIOS information.
+# Note that dmidecode doesn't exist on non-PC architectures. On these,
+# this will return an error which is ignored (error message redirected
+# into $dmi variable).
+
+dmi=$(LANG=C dmidecode 2>&1)
-dmi=`LANG=C dmidecode 2>&1`
+# Architecture.
+# Note for the purpose of testing, we only call uname with -p option.
+
+arch=$(uname -p)
# Check for VMware.
# cpuid check added by Chetan Loke.
# Check for Hitachi Virtualization Manager (HVM) Virtage logical partitioning.
if echo "$dmi" | grep -q 'Manufacturer.*HITACHI' &&
- echo "$dmi" | grep -q 'Product.*HVM LPAR'; then
+ echo "$dmi" | grep -q 'Product.* LPAR'; then
echo virtage
fi
# Check for Parallels.
if echo "$dmi" | grep -q 'Vendor: Parallels'; then
echo parallels
+ skip_qemu_kvm=true
fi
# Check for Xen.
if [ "$cpuid" = "XenVMMXenVMM" ]; then
echo xen; echo xen-hvm
- is_xen=1
+ skip_qemu_kvm=true
elif [ -f $root/proc/xen/capabilities ]; then
echo xen
if grep -q "control_d" $root/proc/xen/capabilities; then
else
echo xen-domU
fi
- is_xen=1
+ skip_qemu_kvm=true
elif [ -f $root/sys/hypervisor/type ] &&
grep -q "xen" $root/sys/hypervisor/type; then
# Ordinary kernel with pv_ops. There does not seem to be
# enough information at present to tell whether this is dom0
# or domU. XXX
echo xen
+elif [ "$arch" = "ia64" ]; then
+ if [ -d $root/sys/bus/xen -a ! -d $root/sys/bus/xen-backend ]; then
+ # PV-on-HVM drivers installed in a Xen guest.
+ echo xen
+ echo xen-hvm
+ else
+ # There is no virt leaf on IA64 HVM. This is a last-ditch
+ # attempt to detect something is virtualized by using a
+ # timing attack.
+ virt-what-ia64-xen-rdtsc-test > /dev/null 2>&1
+ case "$?" in
+ 0) ;; # not virtual
+ 1) # Could be some sort of virt, or could just be a bit slow.
+ echo virt
+ esac
+ fi
fi
# Check for QEMU/KVM.
+#
+# Parallels exports KVMKVMKVM leaf, so skip this test if we've already
+# seen that it's Parallels. Xen uses QEMU as the device model, so
+# skip this test if we know it is Xen.
-if [ ! "$is_xen" ]; then
- # Disable this test if we know this is Xen already, because Xen
- # uses QEMU for its device model.
-
- if grep -q 'QEMU' $root/proc/cpuinfo; then
- if [ "$cpuid" = "KVMKVMKVM" ]; then
- echo kvm
- else
+if ! $skip_qemu_kvm; then
+ if [ "$cpuid" = "KVMKVMKVM" ]; then
+ echo kvm
+ else
+ # XXX This is known to fail for qemu with the explicit -cpu
+ # option, since /proc/cpuinfo will not contain the QEMU
+ # string. The long term fix for this would be to export
+ # another CPUID leaf for non-accelerated qemu.
+ if grep -q 'QEMU' $root/proc/cpuinfo; then
echo qemu
fi
fi